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PQA300 Picture Quality Analysis System Service Manual

1. Figure 6 2 Rear panel feet removal CAUTION Use care when touching the EMI shielding strips around the front of the chassis The fingers of the strip are easily bent and any protruding sharp edges become a potential cutting hazard when you handle the chassis to position it during the remaining remove and replace procedures m Place the protective front cover on the face of the POA300 Position the POA300 face down on a stable working surface with enough head room to install the cabinet Position the cabinet correctly to install it and slide the cabinet over the end of the mainframe chassis Slide the cabinet evenly down on the chassis making sure all the internal cables are clear and do not catch When the front of the cabinet comes in contact with the cabinet retaining tabs around the front of the chassis make sure the edges of th
2. Composite RS 232 Program SCSI SVGA Keyboard Mouse program COM Port 2 monitor decoder Figure 2 1 PQA300 system rear panel Table 2 1 Operating requirements Requirement Specification Source voltage 100 240 VACnys 50 60 Hz Steady State input current 6 Aus maximum 1 25 Arws typical Maximum power consumption 330 Watts max 145 Watts typical Temperature 5 C to 40 C 32 F to 104 F 30 C hr max gradient non condensing derated 1 C per 1 000 ft above 5 000 ft altitude Humidity 20 to 80 relative humidity non condensing Max wet bulb temperature 29 4 C or 84 9 F derates relative humidity to 46 at 40 C or 104 F Altitude 2 000 meters maximum 2 2 PQA300 Picture Quality Analysis System Service Manual Operating Information Standard Accessories The standard PQA300 is shipped with the accessories listed in Table 2 2 Table 2 2 Standard Accessories Description PQA300 Picture Quality Analysis System User Manual PQA300 Application Installation CD ROM Emergency repair disk use as described in the Windows NT System Guide Rack
3. 2000000000 O Figure 1 1 Components of the PQA300 Picture Quality Analysis System PQA300 Picture Quality Analysis System Service Manual 1 1 Specifications Features 1 2 The system consists of the following components m The key system components are the Analyzer DSP module and the Generator DSP module These are identical modules m The Option LC provides an integrated display touch screen U S keyboard keypad and three button mouse m The Composite video option consists of the composite decoder module for capture of composite video and the composite video encoder module for the generation of composite video test sequences m PQA300 Picture Quality Analysis System application software consists of the user interface video capture measurement and results presentation It also has the generate application Additional support features include setups printing and a 601 digital video signal output for external display The standard POA300 Picture Quality Analysis System can determine the picture quality of 601 serial digital video test sequences With the addition of Option 01 composite video you can test composite video test sequences You can use this system to
4. CD Stereo gt Display Controller I O Speaker Figure 6 8 Front panel interface circuit board connectors Removing the CD and The cabinet front bezel and keypad assembly must be uninstalled to remove the Floppy Disk Drive CD and disk drive assembly for service The front panel interface cover or the Assembly flat panel display assembly must be removed only if you need to change the floppy disk drive interconnection cable or the CD audio cable Remove the CD and Floppy Disk drive assembly as follows 1 Remove the mainframe cabinet see Removing the Cabinet on page 6 4 for the removal procedure Remove the front panel bezel refer to Removing the Bezel Trim Ring on page 6 4 for the removal procedure Remove the front panel interface circuit board cover or the flat panel display assembly as appropriate refer either to Removing the Interface Circuit Board Cover on page 6 9 or to Removing the Flat Panel Display on page 6 12 Remove the keypad assembly refer either to Removing the Blank Key Pad Assembly on page 6 11 or to Removing the Key Pad Assembly on page 6 13 for the removal procedure Remove the three screws attaching the CD and Floppy Disk Drive assembly to the chassis There are two screws on the front of the assembly and one on the rear inside the front panel compartment of the
5. Disconnect from Front Panel Interface circuit board Figure 6 6 Flat panel display removal Removing the Key Pad After removing the front panel bezel and flat panel display assembly remove the Assembly front panel keypad assembly as follows 1 Remove the six screws holding the keypad assembly to the mainframe chassis There are two across the top two across the bottom and two on the right side of the assembly see Figure 6 7 2 Disconnect the keypad interconnection cable from the front panel interface circuit board 3 Slide the keypad assembly out of the chassis PQA300 Picture Quality Analysis System Service Manual 6 13 Maintenance Keypad interconnection cable Figure 6 7 Keypad assembly removal m Position the keypad assembly to slide it into the chassis Replacing the Key Pad Assembly Carefully slide the keypad assembly into place and align the mounting screw holes 3 Connect the keypad assembly interconnection ribbon cable to the keypad connector on the front panel interface circuit board see Figure 6 8 4 Install the six attaching screws 6 14 PQA300 Picture Quality Analysis System Service Manual Maintenance Power supply Fan Keypad gt disk drive
6. Front of instrument Sen HIGH MID LOW LOCK ERROR O CO QO lo TOL 10 R151 Luma R115 Chroma Gain Rear of Gain instrument a Figure 5 7 Decoder board adjustment locations PQA300 Picture Quality Analysis System Service Manual 5 9 Adjustment Procedures Adjust Chroma Gain Run the Decoder Diagnostic 1 Set Mode switch to position 2 2 Adjust R115 Chroma Gain until the MID green LED indicator is on and the LOW and HIGH LED red indicators are equal or off The Chroma Gain adjustment is at the top of the board 3 Set Mode switch to 0 normal run mode 4 Check the blanking adjustment on the HIGH and LOW LED indicators Both red LED indicators should be off but it is normal for them to blink occasionally as the blanking level is adjusted 1 In the menu selections under the Other soft key click the Hardware Settings amp Diag selection You will get a message telling you that all PQA300 applications must be stopped to continue Click OK to continue 2 From the Hardware Settings menu select ENC DEC Diagnostics 3 In the ENC DEC Diagnostics menu select Decoder Diags 4 Verify that all diagnostics pass If they
7. 6 31 Figure 6 21 Location of J220 connections and wiring orientation EP E 6 32 Figure 6 22 Front panel interface circuit board connectors 6 33 Figure 6 23 Screw locations for the interface circuit board 6 34 Figure 6 24 Cut away view showing wire routing of fan and speaker wires eee eee hh hh hh 6 35 Figure 6 25 Backplane orientation and screw locations 6 37 Figure 6 26 CPU Jumper setting locations 6 39 Figure 6 27 Placement of bottom spacer pad in inner shipping box 6 42 Figure 6 28 Repackaging 6 43 Figure 8 1 Chassis parts 8 6 Figure 8 2 Modules and mounting hardware 8 9 Figure 8 3 Front panel parts 8 11 Figure 8 4 Cables ses tea sie SE ee 8 13 Figure 8 5 Cabinet parts and accessories 8 16 PQA300 Picture Quality Analysis System Service Manual vii Table of Contents List of Tables Table 1 1 DSP board Table 1 2 NTSC PAL Decoder board Table 1 3 NTSC PAL Encoder board Table 1 4 System components Table 1 5 Rear panel interface Table 1 6 Side panel interface characteristics Table 1 7 AC power source characteristics
8. passed A D 1 connection isolation test passed A D 2 connection isolation test passed End decoder diagnostics Figure 2 12 Encoder Decoder diagnostics and Encoder Auto Cal Use the mouse to select a content area and double click to open the book When you see a topic you want to read about either double click on the topic or select Display in the Help Topics screen to display the help about that topic Select the Index tab to do a search by topic or select the Find tab to do a search of words in the help file Refer to the Windows NT documentation for more information on using a Windows based help system Click on the Help button in a configuration menu to enter the help system at a screen related to that configuration menu Minimize Exit and About The Minimize choice reduces the PQA300 application to an icon but leaves the application running Exit terminates the application and saves the current configuration settings in the shutdown preferences preset file If the shutdown preset file is selected either as the startup preset or as the preset to be restored when the Preference soft key is clicked the configuration settings at the last application exit will be restored The About choice displays the copyright information for the application 2 18 PQA300 Picture Quality Analysis System Service Manual Operating Information Help Topics PQA300 Picture Quality Analysis System Contents
9. PQA300 Picture Quality Analysis System Service Manual 2 3 Operating Information 2 4 Optional Accessories The Option LC system is shipped with the items listed in Table 2 4 in addition to the items listed in Table 2 2 Table 2 4 Additional standard accessories for Option LC systems Description ne Keyboard U S One Mouse pointer Two Styluses for touch screen Part number 118 9402 00 119 4330 02 119 6107 00 The following accessories must be purchased separately Any one of the power cable options shown in Table 2 5 is provided at no charge when ordered with the instrument The optional power cord replaces the standard North American power cord Table 2 5 Optional Accessories Description PQA300 Picture Quality Analysis System Service Manual Video monitor with serial digital component interface Power cord options Part number 071 0914 00 User supplied accessory Opt A1 Universal Euro 230 V 161 0066 09 Opt A2 United Kingdom 230 V 161 0066 10 Opt A3 Australian 230 V 161 0066 11 Opt A5 Swiss 230 V 161 0154 00 Opt AC China 240 V 161 0304 00 PQA300 Picture Quality Analysis System Service Manual Operating Information First Time Operation After you install the PQA300 it is ready to operate First Time Power On Power on the POA300 for the first time as follows 1 Connect an SVGA monitor for a display and a keyboard and mouse for user command inputs See Figure 1 1 and
10. O 27 MHz Clk C285 Q Oscillator adjustment inside Figure 5 1 27 MHz clock test point for frequency adjustment adjustment access hole do not let it slip off the oscillator adjustment The metal tip can possibly short the 5 V to ground and cause an inductor on the reverse side of the board to open N CAUTION When inserting the metal bit of the adjustment tool in the oscillator 12 Adjust the frequency counter for a reading of 27 MHz 5 Hz 26 999 995 to 27 000 005 Hz NOTE The oscillator frequency specification is 27 Hz but you must adjust the frequency to 5 Hz or less to allow for temperature variations while operating 13 Turn off power to the PQA300 14 Remove the analyzer DSP module from the PCI extender board 15 Remove the extender board from the backplane board connector 16 Reinsert the analyzer DSP module in the backplane slot 17 Align the module connector with the backplane connector and press down firmly to seat the module 18 Reinstall the module hold down screw 19 Remove the generator DSP module 20 Insert the PCI circuit board extender into the generator DSP module slot 21 Insert the generator DSP module in the PCI extender board connector 22 Turn the power to the instrument back on and wait for the initialization process to complete and wait a few minutes for the oscillator temperature to stabilize PQA300 Picture Quality Anal
11. External Display SVGA Monitor An SVGA monitor can be attached for external display of the user interface Digital Picture Monitor Output An ancillary display can be attached The output protocol is ITU R BT 601 Front Panel Virtual front panel on external display monitor requires optional mouse and keyboard PQA300 Picture Quality Analysis System Service Manual 1 9 Specifications Table 1 4 System components Cont Characteristic Internal Display optional local control Size Resolution Touch Panel Table 1 5 Rear panel interface Characteristic Parallel interface port Supplemental information LCD 6 bit 250 NIT CCFL backlight 0 264 MM pixel 10 4 in Diagonal 800 X 600 SVGA Standard 10 4 in touch panel pointing device mounted on the surface of the TFT display connecting to the Front Panel Interface Board Description Port supports standard Centronics mode Enhanced Parallel Port EPP or Microsoft high speed mode ECP and utilizes a 25 pin D sub connector Compliant with IEEE P1284 C D2 for bi directional Parallel Peripheral Interface for Personal Computers draft style 1284 C Pin assignments for compatible mode 1 STROBE 14 AUTOLF 2 DO 15 ERR 3 D1 16 INIT 4 D2 17 SELECTIN 5 D3 18 STROBE 6 D4 19 GND 7 D5 20 GND 8 D6 21 GND 9 D7 22 GND 10 ACK 23 GND 11 BUSY 24 GND 12 PaperEnd 25 GND 13 SELECT Serial interface port 9 pin m
12. Replaceable Modules Recommended Tools Removing the Bezel Trim Ring Removing the Cabinet use au ae eue he Replacing the PQA300 Cabinet Replacing the Bezel Trim Ring Application Modules Removing a Plug In Module Reinstalling a Plug In Module Maitiframe Modules sus ses des bete he ee ns ew ees Removing the Interface Circuit Board Cover PQA300 Picture Quality Analysis System Service Manual 1 ARRRWWHWWNNNN ND WWRaAWNOONA AR PRESS 1 Un Un En Un CA CA CA I bog SONNARANHRKB QV ON NON ON GN NON SON ON GN SON ON ON ON A HP D KR RP Table of Contents Reinstalling the Front Panel Interface Circuit Board Cover 6 10 Removing the Blank Key Pad Assembly 6 11 Replacing the Key Pad Assembly 6 12 Removing the Flat Panel Display 6 12 Reinstalling the Flat Panel Display 6 12 Removing the Key Pad Assembly 6 13 Replacing the Key Pad Assembly 6 14 Removing the CD and Floppy Disk Drive Asse
13. Table 1 8 Mechanical characteristics Table 1 9 Environmental characteristics Table 1 10 Electromagnetic compatibility Table 1 11 Environmental limits and use classification for safety certification compliance Table 2 1 Operating requirements Table 2 2 Standard Accessories Table 2 3 Additional standard accessories for Option 01 systems Table 2 3 Additional standard accessories for Option LC Table 2 4 Optional Accessories Table 2 5 Soft key control behavior Table 4 1 Required equipment list Table 4 2 Impaired video test sequences disk Table 4 3 Mobile 601 525 impaired video test sequence results and correction values Table 4 4 Mobile 601 625 impaired video test sequence results Table 4 5 Test oscilloscope settings Table 4 6 Summary PQR for unimpaired sequence using a 601 digital reference sequence Table 4 7 Summary PQR for unimpaired sequence using a captured composite reference sssssss Table 4 8 Mobile NTSC and NTSC No Setup impaired video test sequence results for composite video Table 4 9 Mobile PAL impa
14. 3 14 A D Converters Decoder FPGA Color Lock Parallel to Serial Converter PCI Interface The analog inputs are attenuated to fill the A D converter full scale range and are anti alias filtered for application to the A D converters The output of the A D converters are buffered then decimated by half band filters before being applied to the decoder device When converted to 601 format the standard video input maps into decimal 16 to 235 output levels in 8 bit mode and 32 to 470 levels in 9 bit mode Signals with lower amplitudes will result in reduced decoder accuracy and signals exceeding the standard amplitude by a certain amount are clipped Conversion clocks are derived from a color lock circuit that compares burst from the input to an Fsc subcarrier signal developed by a DDS direct digital synthesizer device running on the 27 MHz oscillator frequency The Ch A and Ch B decoder inputs are 10 bit data from the FPGA The standard operating mode of the decoder uses an adaptive notch 3 line comb filter The field memory stores a field or frame of data used to develop the optional temporal filtering Luminance data always goes to channel A of the decoder device Channel B input can be the chrominance S Video mode or delayed luminance for field and frame comb filter modes The decoder output is fed back to the FPGA device for rounding dither and clipping The input and output of the decoder device goes to a field programm
15. Index Find Click a topic and then click Display Or click another tab such as Index Overviews e Operating Information Basic Operation Tutorial Print Cancel Figure 2 13 Help system contents screen Messages and Prompts Messages and prompts inform you of certain actions See Appendix F for a list of Option 01 and system error messages and their meanings Progress Indicator In the status bar at the bottom of the display a progress indicator shown in Figure 2 14 shows the name of the activity that is occurring and its progress If multiple actions are occurring for example obtaining the results for several test sequences the progress bar will restart with each new action When the final action has finished the progress bar is removed and the action line states that the action has completed The transcript window also displays the action that is occurring in text format Started results 7 PTT TLL 601525 PSNR INF Peak INF Field 56 Figure 2 14 Progress indicator shown across the bottom of the display PQA300 Picture Quality Analysis System Service Manual 2 19 Operating Information 2 20 Capture Mode Several different Capture Mode dialogs are displayed depending upon the choices made in the Capture Configuration menu Activity messages are displayed in the status bar The messages indicate such activity as waiting for a sequence capturing saving and time out The progress indicator sh
16. Location of all the supporting files for the encoder and decoder These files are a set of files that control the operating mode of the encoder and decoder modules Path D POA300 function Location of all the function files tcl for running automated testing sequences These files are the scripts needed to run functions Several function files are provided from Tektronix others are user generated files Path D PQA300 generate Location of all the generate gen test video sequences These files are the Tektronix provided test sequence loaded to the hard drive from CD ROM or from another networked source Path D PQA300 log Location of all the log files The log files are a set of files that record the activity of the application The normal activity is record in the log file User interface errors are recorded in the uierr file Path D PQA300 precompute Location of files that are precomputed as part of the measure process The precomputed files are held here until needed for the measurement Path D PQA300 preference Location of all the preference setup files prf These files are a set of text files that contain the setup information for the configuration files The factory preference file contains the factory configuration settings The shutdown preference file contains the configuration settings that were in effect at the time the PQA300 application was normally exited The other preference files are user generat
17. PQA300 Picture Quality Analysis System Service Manual Mfr code 80009 TK1943 80009 TK1943 00779 80009 TK1943 80009 0KB01 TK1943 TK1943 TK1943 TK1943 0KB01 5Y400 TK1943 9F560 9F560 TK2647 0KB01 0KB01 0KB01 TK1943 TK2250 TK2411 50356 80009 Mfr part number 671 4793 00 407 4699 00 672 1551 01 407 4705 00 205818 2 671 5392 50 407 4813 00 671 4797 00 ORDER BY DESCRIPTION 407 4716 00 671 5390 50 407 4752 00 407 4715 00 ORDER BY DESCRIPTION 407 4710 01 441 4841 00 25L1810 07N3220 97 521 19 10310188 0 0310248 0 211 1070 00 407 4721 02 FD 05HF5630 348 1432 00 CD 224E B93 671 4377 00 8 7 Replaceable Parts Replaceable parts list Cont Fig amp index Tektronix Serialno Serial no number partnumber effective discontd Qty Name amp description Mfr code Mfr part number 26 407 4515 01 1 BRACKET HARD DRIVE MTG 0 040 ALUMINUM TK1943 407 4515 00 ALLLOY 5052 H34 27 211 0721 00 2 SCREW MACHINE 6 32 X 0 375 PNH STL CDPL OKB01 ORDER BY T 15 TORX DR DESCRIPTION 28 119 5695 00 2 FAN DC TUBEAXIAL 12 V 3 24W 2300 RPM 83 TK1943 NMB CFM 119MM X 38MM 35 DBA W 2 PIN 4715KL 04W B10 P00 CONNECTOR 29 407 4700 00 1 BRACKET ASSY FAN MOUNTING TK1943 407 4700 00 8 8 PQA300 Picture Quality Analysis System Service Manual Replaceable Parts e AN bee Fig
18. Rainbow colored wire harness plugs onto J220 8 pin connector Figure 6 21 Location of J220 connections and wiring orientation Interface Board Removal Use the following procedure to remove the interface board and Replacement P Disconnect the speaker wire from the interface board J980 connector see Figure 6 22 2 Disconnect the right side fan wire from the interface board J420 right FAN connector 3 Disconnect the left side fan wire from the interface board J410 left FAN connector 4 Disconnect the floppy disk drive flexible circuit board from the interface board disk drive connector a Release the locking latch on the flexible circuit board connector Release bar A b Pull the flexible circuit board straight out of the connector 6 32 PQA300 Picture Quality Analysis System Service Manual Maintenance Power supply O Fan Keypad Floppy CD Stereo gt Display Controller I O Speaker Figure 6 22 Front panel interface circuit board connectors Disconnect the CD audio cable Disconnect the controller I O ribbon cable from the interface board Disconnect the power supply cable Disconnect the keypad assembly ribbon cable from the interface board SS e Ue cn Remove the five T15 screws from the fron
19. Removing the Flat Panel The flat panel display assembly of the PQA3FLC option comes as an assembled Display and tested unit Remove the flat panel display assembly as follows 1 Reinstalling the Flat Panel Display 6 12 m Remove the front panel trim ring see Removing the Bezel Trim Ring on page 6 4 for the removal procedure Remove the six screws attaching the display assembly to the chassis There are two screws at the top two at the bottom and two at the left side of the assembly see Figure 6 6 Pull the display assembly away from the chassis to expose the connector to the front panel interface circuit board see Figure 6 6 Disconnect the ribbon cable connector from the front panel interface circuit board Make sure that all the cables to the interface assembly are properly con nected see Figure 6 8 Position the flat panel display with the display assembly interconnection near the front panel interface circuit board Connect the cable to the display connector on the front panel interface circuit board Carefully slide the display assembly into the chassis to align it with the mounting screw holes Install the six attaching screws two on the top two on the side and two on the bottom of the chassis PQA300 Picture Quality Analysis System Service Manual Maintenance l Front Panel Interface board
20. r 1 2 3 4 WARNING Altering card locations will require you to reconfigure rear panel cable connections See Help for details Figure 4 18 Hardware settings menu Encoder Decoder Diagnostics amp Auto Cal E Encoder Diagnostics Encoder Auto Cal Results Data path from FPGA thru EDH eoproc test passed Comb memory connection lest passed A D 1 connection isolation test passed A D 2 connection isolation test passed End decoder diagnostics Figure 4 19 Encoder Decoder diagnostics and Encoder Auto Cal 4 36 PQA300 Picture Quality Analysis System Service Manual Performance Verification Setup for Auto Cal Verification Connect the test equipment and adapter cables as shown in Figure 4 20 PQA300 rear panel o Digital o o D Voltmeter o ie J 75 Q feed through terminator sla Input Encoder Composite Out 75 Q BNC to BNC coaxial cable BNC barrel BNC to dual binding connector post adapter Figure 4 20 Setup for Composite video luma Y and chroma C gain and offset 1 Connect a 75 Q cable to the Composite Output BNC connector on the encoder module 2 Connect a 75 Q feed through termination to the coaxial cable BNC connector Use a BNC female barrel connector to connect the termination to the adapter cable 3 Connect
21. Click OK to accept the changes and exit the menu Click on the 601 Display soft key to start the external video display of the Mobile signal After the sequence data is loaded from the hard drive the analyzer starts outputting the sequence Check that the video display on the external digital component video monitor is correct Disconnect the cable going to digital component video monitor from the analyzer Channel A Out BNC connector SVGA video module n 3 To 601 digital 601 Out video monitor 601 Out To SVGA monitor Figure 4 3 Connection for analyzer 601 Out check PQA300 Picture Quality Analysis System Service Manual 4 11 Performance Verification Analyzer 601 Out Amplitude The 601 Out signal amplitude is measured using a test oscilloscope and a 75 Q to 50 Q matching pad The test oscilloscope setup is very important in order to obtain a stable display of on pulse of the serial digital signal so that the positive and negative amplitude values of the waveform can be checked as accurately as possible The accuracy limits of the test equipment used precludes checking for the exact amplitude tolerance allowed for the Rec 601 output 800 mV 80 mV You can get a more accurate measurement if your test equipment is characterized to allow you to eliminate test equipment uncertainty from the measurement 1 Connect the analyzer 601
22. Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock switch off the instrument power then disconnect the power cord from the mains power Use Care When Servicing With Power On Dangerous voltages or currents may exist in this product Disconnect power remove battery if applicable and disconnect test leads before removing protective panels soldering or replacing components To avoid electric shock do not touch exposed connections PQA300 Picture Quality Analysis System Service Manual xiii Service Safety Summary xiv PQA300 Picture Quality Analysis System Service Manual Preface This manual contains the servicing information for the PQA300 Picture Quality Analysis System This information explains how to verify service troubleshoot and repair the system to the module level Specifications describes functional characteristics and performance require ments for the PQA300 Picture Quality Analysis System Operating Information tells you how to install and operate the instrument Theory of Operation provides descriptions of the PQA300 system modules Performance Verification describes how to verify the functional performance of the POA300 system Adjustment Procedures gives the adjustment procedures Maintenance contains the following information m How to safely handle static sensitiv
23. The vertical cursor that is displayed in the graphical results display can also be positioned using both the arrow keys and the mouse cursor The Windows NT operating controls provide access to any instrument configurations that must be made or changed Soft Key Controls The main control soft keys located to the right of and below the display provide access to the various configuration menus and processes These menus are used to control the operation of the PQA300 and to make any configuration changes to the parameters that control the various modes of operation You can remove the soft keys from the display by clicking in the bar at the bottom of the PQA300 screen Click in the bar again to make the soft keys reappear NOTE If you click on a soft key to start a process and the configuration for that process is not correct you will get an error message and the process will not start Correct the configuration and then the process will continue Soft Key Behavior Most of the main menu soft keys have left mouse button and right mouse button selections A click of the left mouse button activates or toggles a specific feature A small indicator in the soft key is turned on when the function associated with that soft key is active A click of the right mouse button on the major function soft keys displays the configuration menu associated with the soft key A press and hold of the left mouse button for longer than about 1 second has the same
24. m Runs CHKDSK EXE on the WINNT and SYSTEM partitions m Verifies each file in the installation and replaces any that are missing or corrupt m Replaces the System Security and Security Accounts Manager hives in the registry m Reinstalls the Boot Loader the boot sector BOOT INI etc PQA300 Picture Quality Analysis System Service Manual A 3 Appendix A Software Repair Reinstalling the PQA300 Picture Quality Analysis System Software Use the following procedures to reinstall your PQA300 software if it is accidently deleted or becomes corrupted The application software is supplied on CD ROM NOTE The following instructions are for reinstalling the PQA300 application software on a machine running Windows NT Workstation 4 0 only procedures for upgrading the software may be different If you are installing a software upgrade follow the instructions provided with the upgrade kit Installing the PQA300 Reinstalling the software involves the following procedures Application Program PP g 1 Place the software install disk in the CD player 2 The Install Wizard displays 3 Select either a full installation or a restoration of selected files depending on the instrument condition Standard Instrument The PQA300 application software supports both the standard instrument and the Encoder and Option 01 instrument but when reloaded into the instrument it is automatically Decoder Driver set up for Option 01 In the
25. power to provide for smooth user interface support and data flow The user interface is supported with the display mouse keyboard of the Option LC The hardware functionality is divided between the standard analyzer and generator DSP boards and the optional NTSC PAL composite video encoder and decoder boards The analyzer DSP board performs video processing Its functions are test sequence recognition and capture sequence normalization application of visual model filter algorithms and composing the output for visual inspection of 3 2 PQA300 Picture Quality Analysis System Service Manual Theory of Operation transported and original test sequences on an attached SVGA computer monitor The I O to the DSP board is implemented in serial 601 format If only serial 601 input is required for the instrument the NTSC PAL composite video option modules can be omitted When installed the NTSC PAL decoder board 601 serial digital output is linked to the analyzer DSP board using an active loop through input connection If the loop through is not continued to a 75 Q system the active loop through need not be terminated The 601 output of the generator DSP is connected to the composite encoder module to a 75 Q terminated SMB input connector You can use an external encoder and decoder to make composite measurements When testing against the 601 digital reference you will see the total effects of the encoder decoder and the system under test You
26. run the Encoder Diagnostics to check for pass or fail of the diagnostic tests 6 Ifthe encoder shows diagnostic failures after the auto calibration refer your PQA300 system to a qualified service person for repairs Decoder Board Adjustments Adjust Luma Gain The hardware of the decoder module supports a field calibration procedure The adjustments of the Luma and Chroma gain have built in indicators for showing the accuracy of the adjustments 1 Set the Mode switch to position 1 See Figure 5 6 2 Adjust R151 Luma Gain see Figure 5 7 until the MID green LED indicator is on and the LOW and HIGH LED indicators are either equal or off The Luma Gain adjustment is about one third of the way down from the top of the board PQA300 Picture Quality Analysis System Service Manual 5 7 Adjustment Procedures LED Indicators lt Rear of instrument R115 R151 Luma Chroma Luma Bandwidth Mode Gain Gain Do Not Adjust Switch LED Indicators t at lt Rear of instrument p m 2 3 HIGH MID LOW LOCK MODE SLOTID O O O e ERROR Figure 5 6 Decoder board LED indicator locations 5 8 PQA300 Picture Quality Analysis System Service Manual Adjustment Procedures LED Indicators
27. you have access to the PQA300 application menus and displays Double click on the PQA300 icon to start the application The PQA300 Picture Quality Analysis System user interface consists of a virtual front panel shown in Figure 2 3 with menus and other configuration control panels that provide access to all the configuration settings and operating control choices Start or stop Display the associated function configuration menu Flowers 601 525 PQA200 lud D oz or lh o 03 Generate Capture Measure 1 Results 601 Diy Pretrences I Place mouse cursor in the status EE Ready bar and use the left mouse This area displays a progress button to toggle the menu soft indicator and shows the PQR keys on or off in the display Selectthe 0 C See the or PSNR value the sequence next results Es choices type and the frame number Figure 2 3 Virtual front panel with soft key menus The displays are viewed on the monitor and all the controls are selected using the mouse pointer and activated by clicks or presses of the mouse buttons The keyboard can be used to input alpha or numeric information when appropriate 2 8 PQA300 Picture Quality Analysis System Service Manual Operating Information The arrow keys on the keyboard are used to step a changeable parameter up and down when that parameter is selected using the mouse cursor
28. you must run the Regedit registration edit program and set the HKEY_LOCAL_MACHINE SOFT WARE Microsoft Windows NT CurrentVersion Winlogon AutoAdminLog value to 0 It must be reset to 1 to enable automatic login See Configure for Auto Boot Up in Appendix C 4 Ifautologin is disabled as described in the preceding note use the key sequence CTRL ALT Delete to display the login dialog box There are three possible logins m You can log in as Administrator and use PQA300 as the password This user can load software change passwords assign users and make the Windows NT system setups for the network W Youcanlog in as PQA300 without entering any password Use this login for normal use of the system for testing picture quality m You can log in as Guest without entering any password A guest has only limited access to files and applications 5 Set the PQA300 clock to the correct system time If you have the ability to diagnose and repair module level defects the service manual will aid you in module level trouble isolation of the POA300 modules Once a problem module is identified you can order an exchange replacement module You will then have to install the module configure the instrument as necessary and do any system calibration that may be needed Troubleshooting of the instrument is not included in the service manual The PQA300 Picture Quality Analysis System supports saving and recalling instrument configuration set
29. 01 CA ASSY RF COAXIAL RFD 1 8 0 L 75 OHM SMB JACK BOTH ENDS OPT 01 TERMINATION COAXIAL 75 OHM BNC OPT 01 CABLE RF COAXIAL SVHS CABLE 4 75 OHM DUL COAX 72 0 L 6 FT MINI DIN 4 POS MALE STR GOLD OPT 01 Mfr code TK2480 80009 93907 12136 0KB01 0B445 TK1943 TK1943 TK2548 TK2548 TK2548 0B445 TK2548 060D9 80009 80009 80009 TK6159 Mfr part number 200 4408 00 348 1154 01 ORDER BY DESCRIPTION PT 3170 212 0213 00 ECM 161 0066 00 390 1176 00 348 1515 00 071 0909 00 063 3477 00 063 3484 00 016 1691 01 ECM 161 0066 00 063 3483 00 012 0159 01 174 3916 00 174 3915 00 011 0102 01 012 1554 00 PQA300 Picture Quality Analysis System Service Manual Replaceable Parts Replaceable parts list cont Fig amp index Tektronix Serialno Serial no number partnumber effective discont d 118 9402 00 119 4330 02 119 6107 00 161 0066 09 161 0066 10 161 0066 11 161 0154 00 161 0304 00 071 0914 00 Qty Name amp description STANDARD ACCESSORIES FOR OPTION LC ASSY 83 KKEYBOARD EY NOTEBOOK KEYBOARD IBM AT OR PS 2 COMPATIBLE GRAY POINTER ASSY MOUSE 400 DPI MOUSE LOGITECH SAW35 STYLUS STYLUS FOR TOUCH SCREEN OPTIONAL ACCESSORIES CA ASSY PWR 3 0 75MM SQ 250V 10A 99 INCH STR IEC320 RCPT EUROPEAN EUROPEAN OPTION A1 ONLY CA ASSY PWR 3 0 1MM SQ 250V 10A 2 5 ME TER STR IEC320 RCPT X 13A FUSED UK PLUG 13
30. A Loop Through Out BNC connector of the analyzer to the serial digital input of the external digital video monitor Set up the video monitor to view the serial digital input Right click the Preference soft key to display the Preference Configuration menu Click the down arrow in the Startup Presets name field a Click on the factory preset to select it Click OK to accept the change and exit the menu Click the Preference soft key to restore the factory configuration settings Right click the Generate soft key to display the Generate Configuration menu Select the correct signal type 601 525 or 601 625 Select to generate the Mobile sequence Click OK to accept the changes and exit the menu Right click the Capture soft key to display the Capture Configuration menu Select the correct signal type 601 525 or 601 625 This selection must be the same signal type as the sequence you selected to generate for the test Select Mobile as the reference to use or use the factory default Any Valid Sequence NOTE The stored reference sequence names are available for selection You may select Any valid sequence as a capture choice but if the captured sequence does not have a matching reference sequence stored in the reference directory you get an error message when you try to measure it You can add the matching reference to the hard disk later and select the sequence to be measured When you start the measurement again the m
31. Click on the locked application 4 Click on the End Task command button This should close the locked application If this does not close the locked application perform the following procedure 1 Press Ctrl Alt Del to access the Windows NT Security dialog box 2 Choose the Shutdown command button to bring up the Shutdown dialog box 3 Choose the Shutdown and Restart option button and then choose OK If this does not end the application or shut down the unit power the instrument down for a few minutes and then proceed with a normal power up NOTE It is not good practice to power down the instrument without first exiting Windows NT Use this method only if the instrument is not responsive Creating and Using an Emergency Repair Disk An emergency repair disk specific to the system is supplied with each PQA300 analyzer Whenever you upgrade the software or change your password it is strongly recommended that you also create a new emergency repair disk This will minimize the chances that you will need to completely reload the operating software for a minor problem PQA300 Picture Quality Analysis System Service Manual A 1 Appendix A Software Repair A Creating an Emergency Repair Disk A 2 Use the emergency repair disk to restore your system to its initial setup state if your system files become corrupt and you are unable to recover the previous start up configuration Last Known Good the Windows NT start
32. NW 1336 SE 51ST STREET 7025 WEST MARCIA RD 27929 SW 95TH SUITE 101 19400 SW TETON AVE PQA300 Picture Quality Analysis System Service Manual City state zip code SALEM OR 97303 PORTLAND OR 97223 BEAVERTON OR 97008 7163 MILPITAS CA 95035 BOTHELL WA 98021 MILPITAS CA 95035 OAKLAND CA 94601 TSUEN WAN N T HONG KONG CN CANBY OR 97013 ELK GROVE VILLAGE IL 60007 BEAVERTON OR 97005 PORTLAND OR 97224 HILLSBORO OR 97123 MILWAUKIE WI 53223 WILSONVILLE OR 97070 TUALATIN OR 97062 Replaceable Parts Replaceable parts list Fig amp index number 8 1 1 10 11 Tektronix part number 671 4778 00 671 4778 01 211 0722 00 351 1022 00 441 2180 00 011 0175 00 211 0722 00 119 5832 00 378 0454 00 119 5694 00 650 3760 01 174 3795 00 Serial no effective B010123 Serial no discont d B010122 Qty Name amp description 1 10 CIRCUIT BD ASSY PICMG BACKPLANE CIRCUIT BD ASSY PICMG BACKPLANE SCREW MACHINE 6 32 X 0 250 PNH STL CDPL T 15 TORX DR CARD GUIDES L 3 0 76 2 A 2 5 63 5 NYLON 6 6 RMS 48 CHASSIS ASSY AL ETCH amp CHROMATE TERMINATOR SCSI III SINGLE ENDED ACTIVE SHIELDED 68 POS MALE 0 05 CTR W JACK SCREWS SCREW MACHINE 6 32 X 0 250 PNH STL CDPL T 15 TORX DR FILTER RFI LINE FILTER 6A 50 60 HZ 115 260 VAC LEAKAGE CURRENT 0 4MA AT 250VAC 60HZ 06GENG FAN GUARD FAN GUARD 4 POSITION FAN DC TUBEAXIAL 12
33. Summary PQR for unimpaired sequence using a captured composite reference Test NTSC and NTSC no setup PAL PQR Luma 1 40 PQR Luma amp Chroma 1 40 PSNR Luma 48 00 45 00 PQA300 Picture Quality Analysis System Service Manual Performance Verification Composite Impaired After you have confirmed that the unimpaired composite video test is correct Sequence Test use the following procedure to test one or more of the impaired video sequences Measuring the impaired test sequence against the stored reference sequence provides a check on the operation of encoder and decoder modules with different levels of impairment in the video material 1 10 11 12 13 In the Generate Configuration menu select one of the impaired video test sequences for example Mobile3mbs In the Capture Configuration menu select the correct signal type for the test NTSC NTSC No Set Up or PAL Select Mobile as the reference sequence Set Capture As to Test Give the test capture a meaningful alias name so you can identify it in a list of captured files That name is also displayed on the results displays to identify the results Click on the Decoder soft key Select Adaptive Line processing Adaptive Line should be used in most cases when testing against the 601 digital reference Click OK to accept the changes and go to the Capture Configuration menu Click OK again to exit the Capture Configuration menu Click on the Generat
34. The controls for setting the slot locations for the analyzer DSP and generator DSP modules are in the Hardware Settings menu shown in Figure 2 11 Click a slot in the configuration menu to switch between Analyzer Generator and Empty undesignated If you switch the location of the Analyzer and Generator you must reconnect the rear panel signal cables appropriately The default configuration is m Slot 1 Option 01 composite decoder if installed m Slot 2 The analyzer DSP m Slot 3 The generator DSP m Slot 4 Option 01 composite encoder if installed m Slot 5 Video circuit card The video card is not a recognized POA300 system module and is shown as Unknown in the Hardware Settings menu 2 16 PQA300 Picture Quality Analysis System Service Manual Operating Information Hardware Settings amp Diagnostics Ed Card Locations G D a e E Cancel e a n n E 1 Help Oo I a dl 2 alia e t Enc Dec Y o E Diags r r L d 4 WARNING Altering card locations will require you to reconfigure rear panel cable connections See Help for details Figure 2 11 Hardware settings menu Encoder Decoder Diagnostics Click the Encoder Decoder soft key selection in the Hardware Settings menu to access the Option 01 user diagnostics shown in Figure 2 12 The diagnostic tests for each module are separately selectable They provide pass fail testing of the Encoder and Decoder module circuitry
35. a BNC to banana jack dual binding post adapter on the 75 Q feed through termination 4 Connect the digital voltmeter lead to the banana jack center conductor RED binding post and connect the lead to the ground BLACK binding post 5 Set the digital voltmeter to measure DC voltage on the 2 V range PQA300 Picture Quality Analysis System Service Manual 4 37 Performance Verification 4 38 Diagnostic Routine Run the supplied diagnostic routine to provide the reference DC voltage level inputs to the encoder 1 Use the Windows NT directory tools to locate the diagnostic executable file It is fount in the PQA300 bin support directory The diagnostic file name is mmcodecs exe 2 Double click on the file name to start the diagnostic routine A small PQA Encoder Decoder dialog box is displayed NOTE This version of the PQA Encoder Decoder diagnostics does not have a help file provided F PDA Encoder Decoder Iofs File Edit View Options Help ss E Meterman Encoder Decoder 2 Figure 4 21 PQA encoder decoder dialog box 3 In the dialog box hold the mouse button down on Option to display the choices and select the encoder diagnostics The Encoder diagnostic window appears PAL Luminance Gain and DC Offset 1 In the encoder diagnostics window select PAL Blanking and press GO see Figure 4 22 2 Record the composite blanking DC level indicated on the voltmeter The expected range is 0 50 mV 3 C
36. and Decoder Diagnostics menu shown in Figure 4 12 The diagnostic test for each module are separately selectable 4 Click the Decoder diagnostics selection As the tests run the test names are displayed in the Results box with the pass or fail result of the test Use the scroll bar to view the completed test results 5 Ifthe decoder shows diagnostic failures perform the decoder adjustment procedure refer to Decoder Board Adjustments on page 5 7 and rerun the Decoder diagnostics again If the decoder diagnostic failure persist the decoder module may need to be replaced 6 Click the Encoder diagnostics selection Encoder Decoder Diagnostics amp Auto Cal x Encoder Diagnostics Encoder Auto Cal Results Data path from FPGA thru EDH capros test passed a Comb memory connection lest passed A D 1 connection isolation test passed A D 2 connection isolation test passed End decoder diagnostics Figure 4 12 Encoder Decoder diagnostics and Encoder Auto Cal 7 All the diagnostic tests should show a pass result If the encoder does not pass any of the tests perform the Encoder Auto Cal and rerun the Encoder diagnostics 4 22 PQA300 Picture Quality Analysis System Service Manual Performance Verification Encoder Auto Cal Typically you would use the Encoder Auto Cal feature about every six months to maintain optimum encoder operation The automatic calib
37. before you service the instrument Before You Begin This manual is for servicing the PQA300 Picture Quality Analysis System To prevent injury to yourself or damage to the PQA300 system fulfill the following requirements m Repair should be performed only by a qualified service person m Read the Safety Summary at the beginning of this manual before beginning service m Read Service Strategy below before beginning service m When using this manual to service your PQA300 system be sure to heed all Service Strategy warnings cautions and notes This manual contains the following maintenance and repair procedures Periodic maintenance Performance verification Field adjustments Module removal and replacement Module level fault diagnosis Once you isolate a problem with a module use the Replaceable Parts List in this manual to determine the correct module part number to order from Tektronix PQA300 Picture Quality Analysis System Service Manual xvii Introduction Tektronix Service Offerings Warranty Repair Service Repair Service Self Service xviii Tektronix provides service to cover repair under warranty Other services are available that may provide a cost effective answer to your service needs Whether providing warranty repair service or any of the other services listed below Tektronix service technicians trained on Tektronix products are best equipped to service your PQA300 system Tektronix t
38. do not refer your instrument to a qualified service person for repairs 5 Disconnect all test equipment and reinstall the top instrument cover This completes the adjustments for the PQA300 system PQA300 Picture Quality Analysis System Service Manual NNNM MSS Maintenance iE Sa CI c2c4 Maintenance This section provides the service information for the PQA300 Picture Quality Analysis System Information about the following topics is provided Handling Static Sensitive Components Cleaning and Inspection Removal and Replace ment Instructions Repacking for Shipment and Obtaining Replacement Packaging Preparation These maintenance instructions are for qualified technicians Be sure to read the Safety Summaries at the front of the manual before beginning service Prior to removing the covers from the instrument read Handling Static Sensitive Components Handling Static Sensitive Components This instrument contains electrical components that are susceptible to damage from static discharge Static voltages from 1 kV to 30 kV are common in unprotected environments Table 6 1 shows the relative static discharge susceptibility of various semiconductor classes Table 6 1 Static susceptibility Semiconductor class Voltage ECL 200 V 500 V Shottky Signal Diodes 250 V Shottky TTL 500 V HF Bipolar Transistors 400 V 600 V JFETs 600 V 800 V Linear Microcircuits 400 V 1000 V Low Power Schottky TT
39. during a measure are grayed out When all the measurements have completed the Summary results are displayed 8 Check the Summary results for the correct measurement values for the captured impaired video test sequence against the values given either in Table 4 3 or in Table 4 4 as appropriate The values given in the tables after the POR and PSNR numbers are the detected parameter values The parameter values especially the levels are typical and can vary as the algorithm is adjusted PQA300 Picture Quality Analysis System Service Manual Performance Verification The PQR and PSNR values you measure should be very close to the values given in the tables If the POR and PSNR values are correct the measure algorithms are verified If there is a significant difference between the measured POR values or the PSNR values for an impaired sequence and the values given in the table for that sequence recheck your configuration and redo the test If the problem persists refer it to a qualified service person Table 4 3 Mobile 601 525 impaired video test sequence results and correction values Mobile at 3 MB s Mobile at 6 MB s Mobile at 9 MB s PQR Luma 8 10 PQR Luma 5 40 PQR Luma 4 20 PQR Luma amp PQR Luma amp PQR Luma amp Chroma 8 50 Chroma 5 70 Chroma 4 40 PSNR Luma 24 00 PSNR Luma 27 20 PSNR Luma 29 50 Y XShift 0 006 Y XShift 0 006 Y XShift 0 000 Cb XShift 0 006 Cb XShift 0 001 Cb XShift 0 00
40. dust and lint use a soft brush to complete the task Use extreme care not to disturb components on the plug in circuit boards during cleaning CAUTION This instrument contains static sensitive devices that can be damaged by static discharge Wear a wrist grounding strap when working on or with modules inside the instrument cabinet Removal and Replacement Instructions The following procedures tell you how to remove and replace the POA300 program monitor modules Part numbers for the modules are in the Replaceable Parts List In compliance with the EISA standard the PQA300 Picture Quality Analysis System modules are in the mainframe card bay Replaceable The standard PQA300 Picture Quality Analysis System consists of the following PQA300 Modules replaceable components m Program Monitor DSP module 1 to 8 modules Composite decoder module POA3FO01 1 to 4 modules The mainframe consists of the following replaceable components m Processor module controller board 1 O module controller input output board PQA300 Picture Quality Analysis System Service Manual 6 3 Maintenance 6 4 Recommended Tools Removing the Bezel Trim Ring Removing the Cabinet Front panel Interface module Two SCSI hard disk drives Power supply module Front panel keypad module circuit board only no keypad Floppy disk drive CDROM drive assembly Backplane circuit board The following tools are recommended for PQA300 Picture Q
41. in the working directory Use this window to select the working directory shown in Figure 2 5 by double clicking on a directory name Double click on the symbol to go up the directory tree one directory at a time You can also enter or edit the path directly in the Path edit field To save your changes either select the OK soft key or press the enter key The Working Directory window closes Working Directory Ed Cancel Path D PQA200 result Figure 2 5 Working directory selection screen PQA300 Picture Quality Analysis System Service Manual Operating Information NOTE The working directory must contain all the PQA200 subdirectories The application software expects to find the files in specific directories If you select a working directory that is not structured as needed for the application the supporting files for generate results and so on will not be available On the instrument the appropriate working directory is D PQA200 File Operations Use the File Operations screen to move files between the internal hard drive and the 1 44 Meg disk drive and to retrieve files from the CD ROM drive The dialog box for the File Operation menu is shown in Figure 2 6 Move down the directory tree by double clicking on a directory name in the top window Select a file by clicking on the name in the bottom window Move back ce 22 up the directory tree by double clicking on the selection Click on t
42. is being processed The progress indicator and the messages in the status bar show you what is happening along with the field number that is being processed After the PQR analysis finishes the PSNR measurement is started The PSNR map of each field is also displayed as the measurements are made When the measurements have completed the Summary results are displayed 6 Check the Summary results for the correct measurement values for the unimpaired video test sequence POR Luma 0 00 POR Luma amp Chroma 0 00 PSNR Luma Infinite 7 Click the soft key at the bottom right of the soft key menu selections now labeled Summary The label changes to Details and Details table is displayed 8 Check that the Details results POR fields are all 0 00 and the PSNR fields are all INFINITE 9 Click the soft key at the bottom right of the soft key menu selections now labeled Details The label changes to Graph and the results graph is displayed 10 Check the PSNR graph for a row of Xs at the bottom of the graph X signifies infinite PQA300 Picture Quality Analysis System Service Manual 4 7 Performance Verification Impaired Sequence Test 4 8 11 In the Legend box select the POR graph Check the POR graph results for a straight horizontal line graph at 0 12 Select the POR YC graph Check the POR graph results for a straight horizontal line graph at 0 If PSNR and PQR values are correct the generate capture measure a
43. must use the Tektronix Option 01 encoder and decoder to capture a composite testing reference for the comparison to de embed the encoder and decoder effects from the measurement Composite video sequences have a different color phase for each field All possible color phases for the selected format NTSC or PAL are sent If a captured composite test reference is selected as the reference sequence the Option 01 decoder looks for the sequence with field color phasing that matches the captured reference color phasing and signals the analyzer to capture the sequence The correct color phase must be captured so that a correct comparison can be made Refer to Creating a Testing Reference in the PQA300 Picture Quality Analysis System User Manual for more information on testing against a captured reference Data Flow The data flow occurs in several phases These are as follows m Waiting for the test sequence m Capturing and saving the test sequence m Performing measurements and saving the results m Displaying results Waiting for a Sequence In this phase the PQA300 analyzer is monitoring the input and waiting to recognize the presence of an embedded test sequence The serial digital signal arrives at the DSP board at 270 Mb s The arriving video fields are scanned in real time for the presence of a keying pattern embedded into the active video portion of a PQA300 system video test sequence In the mode where the PQA300 system is looking for a specific
44. pattern as opposed to any valid test sequence pattern downloading of the copy of the corresponding original sequence into DSP memory begins even before the arrival of the test sequence is detected PQA300 Picture Quality Analysis System Service Manual 3 3 Theory of Operation Capturing the Test Sequence When the arrival of the specified test sequence is detected two seconds of active video are captured into the DSP board memory and saved to the server hard disk drive Performing the Measurement In this phase the captured test sequence and the reference sequence are compared passing them through a variety of DSP filters and deriving measures using various algorithms The results are communicated to the server for display and archival Displaying the Results Finally the statistics of measures are displayed This process also allows for qualitative visual comparison of incoming and reference test sequences by playing them into a high resolution external serial digital video monitor Functional Block Overview 3 4 The PQA300 system is shown in block form in Figure 3 3 The composite video option is included in this discussion A Rec 601 digital video signal source from either the generator or user supplied equipment is applied to a system under test The system under test injects its output into the PQA300 system analyzer DSP Main loop through input BNC connector When a test sequence is recognized the sequence is captured by t
45. result as clicking the right mouse button The soft key functions are shown in Table 2 6 Table 2 6 Soft key control behavior Soft key name Left mouse button click Right mouse button click Generate Activates or terminates a generate task Displays the Generate Configura tion menu Capture Activates or terminates a capture task Displays the Capture Configuration menu Start Starts capturing a user sequence for striping Measure Activates or terminates a measurement Displays the Measure Configura task tion menu Set Region Sets crop limits for a defined sub region Function Activates or terminates a function task Displays the Function Configura tion menu Learning Starts and stops a Learn Mode function creation PQA300 Picture Quality Analysis System Service Manual 2 9 Operating Information Text Editing and Keyboard Controls Display Behavior 2 10 Table 2 6 Soft key control behavior cont Soft key name Print Summary De tail Graph Video Preference 601 Display Results Playback Other Left mouse button click Displays the Print setup menu Cycles through the measurement results displays The label on the soft key changes to show the results type being displayed Restores the user preference setup any in process activity is terminated Activates or terminates the external monitor display Activates or terminates a results display activity Activates or ter
46. standard instrument without the encoder and decoder circuit boards the device driver for those boards must be disabled to prevent an error message about the modules not being installed If the error message appears when starting the POA300 application click OK to continue Turning off the driver stops the message from appearing Use the following procedure to turn off the encoder and decoder device driver in the standard instrument 1 In the Windows NT screen use the Start button in the task bar to select the Windows NT Control Panel Start Settings Control Panel 2 In the Control Panel click on Devices two times quickly to open the device drivers control menu 3 Scroll down the list of device drivers to the POA Encoder Decoder Driver and select it 4 On the right side of the drivers list select Disabled and close the window 5 Close the Control Panel window When you start the PQA300 application with Version 2 0 firmware in a standard instrument the error message about no encoder and decoder modules being installed will not be displayed with the device driver disabled A 4 PQA300 Picture Quality Analysis System Service Manual Appendix A Software Repair Installing the Generator The test sequences are supplied on CD ROM disks in Header Only and Header and Reference Sequences Plus generator sequences The reference sequences are extracted from the generator sequences in the installation process During installation y
47. test video sequence is also captured as a new testing reference and the measurements are redone using the new reference sequence The second test eliminates the artifacts introduced by the encoder and decoder from the picture quality measurement and verifies capturing the correct color phase of the test video sequence Finally the test is done using an impaired test sequence as the test video sequence to capture In each of the tests you check the measurement results against the expected values to verify the functionality of the encoder and decoder modules The following procedure requires the PQA300 to be running and has passed the serial digital functional check 1 Click the Other soft key to display the selection menu and click on Hardware Settings and Diags to display the Hardware Settings menu seen in Figure 4 11 Hardware Settings amp Diagnostics Ed Card Locations G D a E E Cancel a n n 1 e Help a Pu a zie Mas es ek e t Enc Dec r E o r Diags E T 1 3 4 WARNING Altering card locations will require you to reconfigure rear panel cable connections See Help for details Figure 4 11 Hardware settings menu PQA300 Picture Quality Analysis System Service Manual 4 21 Performance Verification 2 A message stating that all the PQA300 applications must be stopped to continue appears Continue with the hardware setup 3 Click on the Enc Dec Diags soft key to display the Encoder
48. the PQA300 The impaired test sequences are provided as Mobile Header Plus sampled at different bit rates When they are measured the reference used in all cases is the Mobile reference sequence as identified from the header ID of the captured test sequence Table C 3 Impaired video test sequences disk Sequence format Sequence title Sample rate 601 525 Mobile3mbs 601 3 Mbits sec 601 525 Mobile6mbs 601 6 Mbits sec 601 525 Mobile9mbs 601 9 Mbits sec 601 625 Mobile3mbs 601 3 Mbits sec 601 625 Mobile6mbs 601 6 Mbits sec 601 625 Mobile9mbs 601 9 Mbits sec C 2 PQA300 Picture Quality Analysis System Service Manual
49. the characteristics of the video in the test sequences are shown in Table C 1 for 601 525 format and in Table C 2 for 602 625 format Each of the files is provided as Header Only and Header Plus video test sequences for the generator The analyzer references are extracted from the generator video sequences during loading NOTE Sequence of the same name in 525 and 625 formats do not necessarily have exactly the same content Though very similar the test sequences were acquired at different times they were not converted from one format to another Table C 1 Video test sequences for 601 525 format Disk File number name Sequence title Characteristic Motion Source 1 Flower Flower Garden Color details landscape Slow Pan CCIR 15 Cheer Cheerleaders Fast complex sports rich back Sports CCIR 39 ground Kiel Kiel Harbor 4 Luminance detail landscape Zoom CCIR 26 2 Tempete Tempete Horizontal vertical luminance color Random motion CCIR 44 detail Susie Susie Skin tone talking head Slow CCIR 16 Tennis Table tennis Multiple random motion sports Pan CCIR 29 3 Football1 Football1 Sports busy large objects Rapid motion CCIR 38 Football2 Football2 Slowly milling people sports Slow moving objects CCIR 38 Ferris Ferris Wheel Luminance and color details Fast complex CCIR 36 4 Diva Diva Titles on busy scene Slow CCIR 43 Mobile Mobile and Calendar Random motion of objects Slow CCIR 30 Shinj
50. 0 A 81 0 DSP Buffer Bidirectional BURN GLUE PLD LS Data 81 0 To from 1 0 ASIC LS Addresses 18 0 um Dual Port ner V Status Control E Registers To PCI FIFO E Asc ee ASIC Reset PCI PLD ee 1 em 4 PCI Bus BOOT ROM Figure 3 8 Digital signal processor module DSP section simplified block diagram Dual Port Bypass PQA300 Picture Quality Analysis System Service Manual 3 11 Theory of Operation Composite Decoder 3 12 PCI Bus Interface Boot ROM Input PCT is the bus interface between the plug in modules and the server The PCI system is made up of a PCI interface chip 64 KB of Dual Port shared memory a discrete status register PCI FIFOs and a PCI control circuit PLD The DSP system can generate interrupts onto the PCI bus The PCI system can also generate interrupts to the DSP system The PCI system provides setup and control messages to the DSP processors through the Dual Port shared memory system DMA transfers that bypass the Dual Port shared memory can be initiated by the PCI host or by the on board DSP processors The Boot ROM is a 4 Mbit Flash EPROM 8 bits wide It contains the boot steps used to start up the DSP module when the server is started The DSP start up diagnostics are contained in the Boot ROM The Boot ROM is not programmable on board the module It is installed in its socket after programming The programming stored in the B
51. 0 036 Y Level 0 116 Cb Level 0 296 Cb Level 0 119 Cb Level 0 011 Cr Level 0 455 Cr Level 0 180 Cr Level 0 111 Y Gain 1 000 Y Gain 0 999 Y Gain 1 000 Cb Gain 0 972 Cb Gain 0 998 Cb Gain 0 992 Cr Gain 0 994 Cr Gain 0 998 Cr Gain 0 999 10 If you want additional verification of the measure algorithm you can repeat the impaired video sequence test using another of the impaired video test sequences The expected test results for the impaired video sequences are given either in Table 4 3 or in Table 4 4 as appropriate for the video format Check Analyzer DSP The following procedure checks that the 601 Out connector provides a serial 601 Out Signal digital signal to the external serial digital monitor 1 Disconnect the main loop through out connection to the external digital monitor You can also disconnect the generator 601 output from the analyzer Channel A In connector 2 Connect the analyzer module 601 Out signal to the external monitor serial digital input connector as shown in Figure 4 3 4 10 PQA300 Picture Quality Analysis System Service Manual Performance Verification Analyzer Generator module module Seo mw Un cdm 10 Right click the 601 Display soft key to display the External 601 Display Configuration menu Select Sequence as source of the video test sequence Select Mobile as the sequence to playback Check that Forward and Continuous are enabled
52. 0 MHz PQA300 Picture Quality Analysis System Service Manual 1 7 Specifications Table 1 3 NTSC PAL Encoder board cont Characteristic Serial receiver equalization range Serial Black Out Format Output type Amplitude Rise Fall time Return loss Jitter Encoder Conversion Accuracy at Output Amplitude accuracy Frequency response Group delay Luminance Linearity Differential Gain Performance requirement 270 MB s serial component video 800 mV 100 mV Within 1 Supplemental information Proper operation with coaxial cable up to 14 5 dB loss at 135 MHz using coaxial cable with 1 VF loss characteristics Nominally 150 meters of Belden 8281 coaxial cable Complies with ITU R BT 601 BT 656 and SMPTE 259M 75 Q SMB 0 3 ns to 1 2 ns measurement 20 to 80 215 dB from 5 MHz to 270 MHz lt 0 2 UI above 10 Hz Only when burst genlocked Within 1 to 5 MHz relative to 400 kHz 10 ns or less at 5 MHZ relative to luma transition lt 1 measured with a 5 step staircase lt 0 5 Differential phase lt 0 5 degree Chrominance to Luminance Gain Error lt 2 Chrominance to Luminance Delay lt 7 ns Error Field and Line Tilt lt 0 5 S N Ratio 260 dB unweighted 5 MHz low pass filtered Composite DC offset lt 50 mV 1 8 PQA300 Picture Quality Analysis System Service Manual Specifications System Components Table 1 4 System components Cha
53. 10 Connect the Generator Channel A Out loop through connector to the matching pad on the test oscilloscope CH 1 input Right click the 601 Display soft key to display the External 601 Playback Configuration menu ChA In SVGA video module Ch A Out 601 Out To test oscilloscope To SVGA monitor Figure 4 10 Connections for the Generator Channel A Out loop through check PQA300 Picture Quality Analysis System Service Manual 4 19 Performance Verification Analyzer and Generator Channel B Out Loop Through Connectors 4 20 Mo e A cm 11 12 Select the Mobile sequence in 601 525 or 601 625 as appropriate to play back to the 601 out connector Check that the playback is set for Continuous Looping Click on the OK button to accept the changes and exit the menu Click the 601 Display soft key to start the playback From the test oscilloscope record the CH 1 Low amplitude of the digital waveform The value is approximately 400 mV In the test oscilloscope Trigger menu set the polarity to positive Let the measurement stabilize Record the CH 1 High amplitude of the digital waveform Check that the sum of the high and low amplitude measurements is within the range of 738 mV to 862 mV This ends the functional verification procedure for the analyzer and generator BNC connections Disconnect the cables and test equipment Th
54. 2 Cr XShift 0 003 Cr XShift 0 005 Cr XShift 0 002 Y Y Shift 0 000 Y Y Shift 0 000 Y Y Shift 0 000 Cb YShift 0 000 Cb YShift 0 000 Cb YShift 0 000 Cb YShift 0 000 Cr YShift 0 000 Cr YShift 0 000 Left Crop 8 Left Crop 8 Left Crop 8 Top Crop 4 Top Crop 4 Top Crop 4 Right Crop 8 Right Crop 8 Right Crop 8 Bottom Crop 4 Bottom Crop 4 Bottom Crop 4 Y Level 1 606 Y Level 0 782 Y Level 0 134 Cb Level 0 089 Cb Level 0 087 Cb Level 0 058 Cr Level 0 463 Cr Level 0 045 Cr Level 0 429 Y Gain 0 978 Y Gain 0 993 Y Gain 0 999 Cb Gain 0 986 Cb Gain 0 992 Cb Gain 0 992 Cr Gain 0 992 Cr Gain 1 000 Cr Gain 0 995 PQA300 Picture Quality Analysis System Service Manual 4 9 Performance Verification Table 4 4 Mobile 601 625 impaired video test sequence results Mobile at 3 MB s Mobile at 6 MB s Mobile at 9 MB s PQR Luma 7 80 PQR Luma 5 30 PQR Luma 4 20 PQR Luma amp PQR Luma amp PQR Luma amp Chroma 8 20 Chroma 5 60 Chroma 4 40 PSNR Luma 24 90 PSNR Luma 28 30 PSNR Luma 30 60 Y XShift 0 001 Y XShift 0 005 Y XShift 0 001 Cb XShift 0 004 Cb XShift 0 001 Cb XShift 0 001 Cr XShift 0 005 Cr XShift 0 002 Cr XShift 0 000 Y YShift 0 000 Y YShift 0 000 Y YShift 0 000 Cb YShift 0 000 Cb YShift 0 000 Cb YShift 0 000 Cr YShift 0 000 Cr YShift 0 000 Cr YShift 0 000 Left Crop 8 Left Crop 8 Left Crop 8 Top Crop 0 Top Crop 0 Top Crop 0 Right Crop 8 Right Crop 8 Right Crop 8 Bottom Crop 0 Bottom Crop 0 Bottom Crop 0 Y Level 0 085 Y Level
55. 6 PACIFIC ELECTRICORD CO 82692 INTERMEC TECHNOLOGIES CORP 93907 CAMCAR DIV OF TEXTRON INC 9F560 IBM CORPORATION TKOAT AMP INC TK0588 UNIVERSAL PRECISION PRODUCT TK1163 POLYCAST INC TK1562 XPEDX TK1935 ACCRA FAB INC Address 312 EAST MAIN STREET 9730 INDEPENDENCE AVE 810 SE SHERMAN 5750 NE MOORE COURT 1643 HADDON AVE PO BOX 1448 4300 SOUTH RACINE AVENUE 2040 15TH AVE WEST 1161 E SANDHILL AVE D PO BOX 5228 6136 NE 87TH AVENUE 2200 US HWY 27 SOUTH PO BOX 1980 SHIELDING WAY PO BOX 650 6520 N BASIN AVE 6505 KAISER DR 2880 SCOTT BLVD PO BOX 58062 7733 TELEGRAPH RD PO BOX 750 INDUSTRIAL TAPE DIVISION 3M CENTER 740 CALLE PLANO PO BOX 115 1880 SW MERLO DRIVE PANASONIC INDUSTRIAL CO DIV TWO PANASONIC WAY 476 HIGHLAND COLONY PKY PO BOX 748 5720 C NE 121ST AVE STE 110 14150 SW KARL BRAUN DR PO BOX 500 747 WEST REDONDO BEACH PO BOX 10 9290 LESAINT DRIVE ATTN ALICIA SANFORD 516 18TH AVE 420 E SOUTH TEMPLE ST 7 15 14 ROPPONGI MINATO KU 1775 NW CORNELIUS PASS RD 14140 SW 72ND AVE SUITE 100 9111 NE COLUMBIA BLVD 11007 NE 37TH CIRCLE PQA300 Picture Quality Analysis System Service Manual City state zip code WESTFIELD PA 16950 CHATSWORTH CA 91311 PORTLAND OR 97214 4657 HILLSBORO OR 97124 6474 CAMDEN NJ 08103 CHICAGO IL 60609 SEATTLE WA 98119 2783 CARSON CA 90746 PORTLAND OR 97220 RICHMOND IN 47374 DELAWARE WATER GAP PA 18327 PORTLAND
56. 9 d Video ChBOut Ref out To Serial 601 digital black out video monitor Figure 4 13 Connections for the encoder and decoder functional check Composite To SVGA monitor 1 Connect the Generator 601 Out BNC connector to the encoder 601 In SMB connector using the 75 2 coaxial interconnection cable provided 2 Do not connect the encoder Serial Black Out connector to the generator DSP Channel B In connector If it is connected disconnect it Genlock synchro nizing the encoder to the generator is derived from the serial digital video signal from the generator DSP 3 Connect the decoder 601 Out SMB connector to the analyzer DSP Channel B In SMB connector using one of the 75 2 coaxial interconnection cables provided 4 24 PQA300 Picture Quality Analysis System Service Manual Performance Verification 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Use the BNC to BNC coaxial cable to connect the encoder Composite Out BNC connector to the decoder Composite loop through input Terminate the decoder Composite loop through connector using a 75 Q BNC termination Use a BNC to SMB adapter coaxial cable to connect the analyzer Channel B Out SMB connector to the 601 serial digital video monitor Set up the video monitor to view the serial digital input Doubl
57. A FUSE UNIT UNITED KINGDOM OPTION A2 ONLY CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 ME TER STR IEC320 RCPT AUSTRALIA AUSTRALIA OPTION A3 ONLY CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 ME TER STR IEC320 RCPT SWISS SWISS OPTION A5 ONLY CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 METER STR IEC320 RCPT CHINA CHINA OPTION AC ONLY MANUAL TECH SERVICE PQA300 PICTURE QUALITY ANALYSIS SYSTEM PQA300 Picture Quality Analysis System Service Manual Mfr code 01963 46628 03ZT7 2W733 TK2541 80126 5F520 0B445 TK2548 Mfr part number 684 4100PAU 850448 0001 T1100 ORDER BY DESCR ORDER BY DESCR ORDER BY DESCR 86515030 E13 900 098 A01 071 0914 00 8 15 Replaceable Parts Figure 8 5 Cabinet parts and accessories 8 16 PQA300 Picture Quality Analysis System Service Manual Appendices ER Appendix A Software Repair The information in this appendix explains how to create and use an Emergency Repair Disk gives instructions on reloading the PQA300 software and how to load the video test sequences If an Application Locks As with all software the application may lock up In most cases the best solution is to use the Windows NT End Task utility The following procedure uses this utility to unlock the application 1 Press Ctrl Alt Del to access the Windows NT Security dialog box 2 Choose the Task List command button to bring up the Task List dialog box 3
58. A xS 3 9 Figure 3 8 Digital signal processor module DSP section simplified block diagram ect eR REESE RA se die ele die eee 3 11 Figure 3 9 Decoder simplified block diagram 3 13 Figure 3 10 Encoder simplified block diagram 3 16 PQA300 Picture Quality Analysis System Service Manual V Table of Contents vi Figure 4 1 On Stby switch Figure 4 2 Initial connections for the functional check Figure 4 3 Connection for analyzer 601 Out check Figure 4 4 CH 1 high amplitude Figure 4 5 CH 1 low amplitude Figure 4 6 CH 1 fall time Figure 4 7 CH 1 rise time 2 ore E ceee Ure thx Figure 4 8 Connection for analyzer Channel A Out loop through CHECK PPP Figure 4 9 Connection for generator output check Figure 4 10 Connections for the Generator Channel A Out loop through check receno cenene A ERR AE ERE RI EU A eee Figure 4 11 Hardware settings menu Figure 4 12 Encoder Decoder diagnostics and Encoder Auto Cal e erede ot tem te ota ee eram wie wae Figure 4 13 Connections for the encoder and decoder functional CHECK m cere seins een ne terne Sd are re ets Figure 4 14 Decoder Configuration menu Notch processing Sel CUOTL serea nee Le s en ya ox Ie hem doe e e RT a is Figure 4 15 Decoder Configur
59. ABLE CLAMP RIBBON 1 0 X 1 0 GRAY 52152 80610029243 3484 10 POLYVINYL W URETHANE FOAM TAPE BACKING 00 RETAINS 6 RIBBON CABLES 12 174 4261 00 1 CA ASSY SCSI CONTROL SCSI 68POS MALE X 3 060D9 174 4261 00 SCSI 68 POS FEMALE PANEL MOUNT 13 174 3786 01 1 CA ASSY SP LEC HIGH DENSITY FLOPPY DRIVE 060D9 174 3786 01 ZIF 6 039 CTR IN PLATED END FOR ZIF LINE CONNECTOR 14 174 4223 00 1 CABLE ASSEMBLY FRONT PANEL INTERFACE 2 X 060D9 174 4223 00 50 15 0 INCHES 15 174 3814 00 1 CA ASSY SP ELEC RIBBON IDC 4 26 30 AWG 060D9 174 3814 00 15 0 L FEMALE STR 2 X 2 0 079 CTR 2MM BERG 69307 004 16 174 3787 00 1 CA ASSY SP ELEC RIBBON DISPLAY ADAPTOR 060D9 174 3787 00 BOARD FLX 50 28AWG 6 5 L RCPT 2 X 50 FEMALE STR 0 079 C 17 174 3789 00 1 CAASSY SP ELEC RIBBON FRT PNL POWER 060D9 174 3789 00 IDC 30 28AWG PVC 3 FOLDS 2 25 L 8 5 L 5 5L 2 5L RCPT F 18 174 4237 00 1 CA ASSY SP BR RIBBON USB SPEAKER 26 AWG 060D9 174 4237 00 1X60 1 CTRX2 1X40 1CTR 19 174 4224 00 1 CABLE ASSEMBLY IDE TO CD ROM 11 200 X 060D9 174 4224 00 10 400 X 6 800 X 2 850 20 174 4262 00 1 CA ASSY RIBBON SCSI LED 26 AWG 6 500L 2X 060D9 174 4262 00 BERG P N 65039 35 21 211 0722 00 7 SCREW MACHINE 6 32 X 0 250 PNH STL CDPL 0KB01 ORDER BY T 15 TORX DR DESCRIPTION 8 12 PQA300 Picture Quality Analysis System Service Manual Replaceable Parts NS CESSES 1 oe fan ata 4 Xf TEE AL a
60. C NTSC No Setup PAL B D G H and I 0 5 V peak to peak 270 MB s serial component only 800 mV 80 mV 0 4 ns to 1 2 ns measured 2096 to 8096 lt 0 2UI above 10 Hz Supplemental information Passive loop through 75 Q compensated BNC 40 dB up to 6 MHz on composite video 0 6dB Max to 6MHz for composite video 4596 20 typical 20 ppm 0 5 degree on 0 dB signal 20 dB hum 50 dB SNR Standard S Video and connector No loop through terminated 25 dB typical One BNC one SMB Identical signals on both output connectors Complies with ITU R BT 601 BT 656 and SMPTE 259M Output impedance 75 Q 15 dB return loss 5 to 270 MHz Frequency 270 Mbit s nominal tracks input signal Output mode 8 bit or 9 bit not user selectable Conversion Accuracy Gain 1 2 low frequency Flatness 1 to 5 MHz for luma relative to 500 kHz Luma linearity 2 Differential Gain 1 Differential Phase 1 degree Black Level Error 10 mV 1 6 PQA300 Picture Quality Analysis System Service Manual Specifications Table 1 3 NTSC PAL Encoder board Characteristic Genlock analog black burst input Format Input type Return loss Loop through insertion loss Color Framing Genlocked to input reference Burst lock jitter Genlock noise performance Burst lock phase change with input burst amplitude Burst lock phase change with input Performance requirement B
61. Carefully pull up on the controller board to loosen it from the backplane connectors 8 When the board is loose from the backplane connectors lift the assembly up and out of the module bay Place the removed circuit board on a static free surface or in a protective anti static bag PQA300 Picture Quality Analysis System Service Manual 6 25 Maintenance 6 26 Controller 1 0 Board Removal and Replacement Reinstall the Controller Board Use the following procedure to reinstall the controller circuit board Refer to CPU Jumper Settings on page 6 37 to verify the correct positions of all the jumpers on the Controller board 1 Position the controller board in the card bay in slot 11 the second slot from the right when looking at the rear of the mainframe chassis CAUTION While handling and installing the controller board do not press on the memory SIMMs single inline memory modules 2 Lower the controller board into the mainframe while dressing the I O board to controller board wiring harnesses away from the slot position 3 Align the controller board edge connectors with the backplane slot connec tors and press down firmly on the top edge of the circuit board to seat the controller board in the backplane connectors 4 Attach the controller board bracket to the mainframe chassis with two T15 screws Torque the screws to 8 in lbs 5 Reconnect the I O board to controller board cables Refer to Connect I O board t
62. Carefully slide the cover assembly into the chassis to align it with the mounting screw holes 2 Install the six attaching screws two on the top two on the side and two on the bottom of the chassis Torque to 8 in lbs 6 10 PQA300 Picture Quality Analysis System Service Manual Maintenance Removing the Blank Remove the blank keypad circuit assembly as follows keypad Assembly Remove the front panel bezel see Removing the Bezel Trim Ring on page 6 4 for the removal procedure 2 Remove the six screws holding the keypad assembly to the mainframe chassis There are two across the top two across the bottom and two on the right side of the assembly see Figure 6 5 Figure 6 5 Blank keypad assembly removal 3 Slide the keypad assembly out of the chassis far enough to access the interconnection cable connector on the back of the keypad circuit board 4 Disconnect the keypad interconnection cable to the interface circuit board from the keypad circuit board PQA300 Picture Quality Analysis System Service Manual 6 11 Maintenance Replacing the keypad 1 Assembly Position the keypad assembly to slide it into the chassis Connect the keypad assembly interconnection ribbon cable to the keypad connector on keypad circuit board Carefully slide the keypad assembly into place and align the mounting screw holes Install the six attaching screws
63. Description A statement that describes a characteristic usually in limit form This statement is considered to be binding on the company seller and can be verified by performing the appropriate portion of the Performance Verification Procedure or by a separate and available procedure Supplemental information Statements that explain performance require ments or provide performance information These are not considered to be statements of guaranteed performance and are not ordinarily supported by a performance check The Performance requirements are valid within the environmental limits if the instrument is adjusted at 25 C 5 C and you allow a minimum warm up time of 20 minutes PQA300 Picture Quality Analysis System Service Manual Specifications Hardware Specifications Table 1 1 DSP board Characteristic Description Supplemental information Input Signal Format Complies with ITU R BT 601 BT 656 and Channel A 601 In and 601 Out Channel 2 Ref In and Ref Out Channel 1 to Channel 2 Isolation Input Return Loss Serial Receiver Equalization Range Active loop through output characteristics Loop Output Return Loss Output Signal Format Output impedance Return Loss Receives 270 MB s serial digital signal 270 MB s serial digital signal SMPTE 259M Active loop through BNC 75 terminating Active loop through SMB 75 Q terminating 30 dB to 300 MHz At least 15 dB 1 MHz to 270 MHz with p
64. ESISTIVE 10 4 INCH DISPLAY OPT LC 8 10 PQA300 Picture Quality Analysis System Service Manual Replaceable Parts Figure 8 3 Front panel parts 8 11 PQA300 Picture Quality Analysis System Service Manual Replaceable Parts Replaceable parts list Fig amp index Tektronix Serialno Serial no number partnumber effective discontd Qty Name amp description Mfr code Mfr part number 8 4 1 343 1652 00 1 RETAINER CIRCUIT BOARD TK1943 343 1652 00 2 174 4229 00 1 CABLE ASSEMBLY PARALLEL PORT 2 500 INCHES 060D9 174 4229 00 3 174 4226 00 1 CABLE ASSEMBLY PARALLEL PORT 2 X 13 2 500 060D9 174 4226 00 INCHES 4 174 4227 00 1 CABLE ASSEMBLY FLOPPY 2 X 17 2 500 INCHES 060D9 174 4227 00 5 174 4225 00 2 CABLE ASSEMBLY KEYBOARD MOUSE COM1 2 X 060D9 174 4225 00 5 3 850 INCHES 6 174 3940 00 1 CA ASSY RF COAXIAL RFD 1 75 OHM 060D9 174 3940 00 RG179 DOUBLE SHIELDED 10 0 L 7 174 3939 00 1 CA ASSY RF COAXIAL RFD 1 75 OHM 060D9 174 3939 00 RG179 DOUBLE SHIELDED 12 5 L 8 174 3761 00 1 CA ASSY SP RIBBON RS232 IDC 9 3 5 L END TO 060D9 174 3761 00 END DSUB MALE RTANG 9 POS 0 109 CTR W THD INSER 9 131 0890 01 2 CONN HARDWARE DSUB JACK SCREW 4 40 X 0KB01 131 0890 01 0 312 L HEX HD STL CD PL W 2 FLAT WASHERS 1 LOCK WASHER 4 10 174 4260 00 1 CA ASSY DESCRETE SCSI POWER 16AWG 19 5L 060D9 174 4260 00 2 DRIVE VERSION 11 343 0775 00 2 C
65. Figure 1 2 for the connector locations If you have the local control flat panel display installed option LC use the local display You do not have to connect an external SVGA monitor You can connect the keyboard and mouse either to the rear panel connectors or to the left side connectors 2 Press the On Stby switch to power on the instrument see Figure 2 2 for the switch location Whenever you power on the POA300 it initializes and starts the POA300 application without the need to enter a user name and password as normally required for a Windows NT operating system For more information on the Windows NT initialization process refer to Windows NT documentation Tektronix PQA300 Picture Quality Analysis System On Stby switch Figure 2 2 On Stby switch 3 When the PQA300 application starts click on the X in the upper right corner of the PQA300 application window to stop the PQA300 application PQA300 Picture Quality Analysis System Service Manual 2 5 Operating Information Preference Preset 2 6 NOTE The PQA300 uses automatic login with the user name of Administrator and the password of PQA300 No other user can log in while the autologin property of the application is enabled If it becomes necessary to disable the automatic login
66. L 900 V TTL 1200 V PQA300 Picture Quality Analysis System Service Manual 6 1 Maintenance Observe the following precautions to avoid damaging static sensitive devices 1 Minimize handling of static sensitive components 2 Transport and store static sensitive components or assemblies in their original containers on a metal rail or on conductive foam Label any package that contains static sensitive components or assemblies 3 Discharge the static voltage from your body by wearing a wrist grounding strap when handling static sensitive components Service assemblies containing static sensitive components at static free work stations 4 Remove any device capable of generating or holding a static charge from the work station surface Whenever possible keep the component leads shorted together Pick up components by the body never by the leads Do not slide components over any surface Spe cw Avoid handling components in areas where the floor or work surface covering is capable of generating a static charge 9 Use a soldering iron that is connected to earth ground 10 Use only special antistatic suction or wick type desoldering tools Cleaning and Inspection Preventive maintenance consists of cleaning and visual inspection The schedule depends on the severity of the operating environment Under average conditions perform preventive maintenance after 2000 hours of operation Clean the entire Test System ofte
67. OR 97217 FREMONT CA 94555 SANTA CLARA CA 95052 8062 MONTEBELLO CA 90640 6537 ST PAUL MN 55144 1000 CAMARILLO CA 93010 OSKALOOSA IA 52577 0115 BEAVERTON OR 97006 SECAUCUS NJ 07094 RIDGELAND MS 39158 0748 VANCOUVER WA 98682 BEAVERTON OR 97077 0001 GARDENA CA 90247 4203 FAIRFIELD OH 45014 ROCKFORD IL 611045181 SALT LAKE CITY UT 84145 TOKYO JAPAN HILLSBORO OR 97124 TIGARD OR 97224 PORTLAND OR 97220 VANCOUVER WA 98682 8 3 Replaceable Parts Manufacturers cross index Cont Mfr code TK1943 TK2172 TK2250 TK2383 TK2376 TK2383 TK2385 TK2411 TK2480 TK2541 TK2548 TK2607 TK2647 TK6074 TK6108 TK6181 8 4 Manufacturer NEILSEN MANUFACTURING INC WYLE ELECTRONICS INC ARROW ELECTRONICS INC PANASONIC INDUSTRIAL CO CONDUCTIVE RUBBER TECH PANASONIC INDUSTRIAL CO METALCAST ENGINEERING INC TEKTRONIX HONG KONG WILLAMETTE PLASTIC AMERICOR ELECTRONICS LTD XEROX CORPORATION VANSTAR CORPORATION INSTRUMENT SPECIALTIES CO INC DYNAPRO THIN FILM PRODUCTS KENT H LANDSBERG CO IMC PLASTICS INC Address 3501 PORTLAND RD NE 10300 SW NIMBUS AVE BLDG P SUITE B 9500 SW NIMBUS AVE BLDG E 1600 MC CANDLESS DR 22125 17TH AVE SE SUITE 117 1600 MC CANDLESS DR 4800 COLISEUM WAY 8 F MAPPIN HOUSE 98 TEXACO RD 1111 NW 5TH PLACE UNIT H 2682 W COYLE AVE 14181 SW MILLIKAN WAY OREGON CORP ACCOUNTS DIVISION 16280 SW UPPER BOONES FERRY RD C O TEMCO
68. Out connector through a 75 Q coaxial cable and the 75 Q to 50 Q matching adapter to the CH1 input of the test oscilloscope Set the test oscilloscope for the settings given in Table 4 5 The parameters shown are for the example test oscilloscope given in the test equipment list If you use an equivalent oscilloscope of a type other than the example refer to the operating manual of that oscilloscope to determine the settings Table 4 5 Test oscilloscope settings CH 1 Vertical controls Setting Coupling DC Bandwidth Full Vertical Scale 250 mV div Position 0 div Offset OV Deskew 0s Impedance 50 Q CH 1 On Horizontal controls Setting Time Base Main at 2 ns Trigger Position 5096 Record Length 500 Acquisition controls Setting Mode Average at 24 Repetitive Off Stop After RunStop Button Cursors Setting Function V Bars Mode Independent Time Units Seconds PQA300 Picture Quality Analysis System Service Manual Performance Verification Table 4 5 Test oscilloscope settings cont mately as shown in Figure 4 4 Cursors Setting Amplitude Units Base Position 1 5 7 ns Position 2 5 6 ns Measurement Setting Gating On Cursor Type V Bar Cursors Measure 1 Type High Measure 2 Type Low Measure 3 Type C1 Rise 20 to 80 Measure 4 Type C1 Fall 20 to 80 Measure 1 Source CH 1 Measure 2 Source CH 1 Measure 3 State ON Measure 4 State ON Method Minimum Trigger controls Setting Ty
69. STOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES Table of Contents General Safety Summary ccc cece cece cece cece cees Service Safety Summary Preface Related Manuals Manual Conventions Introduction Before You Begin Service Strategy Tektronix Service Offerings Warranty Repair Service Repair Service Self Service Contacting Tektronix Specifications Product Description Operating Features Specification Tables Performance Conditions Hardware Specifications System Components Power Specifications Mechanical Physical Characteristics Environmental Characteristics Certification and Compliances Operating Information Installation First Time Operation First Time Power On Preference Preset Virtual Front Panel Controls Soft Key Controls Indicators and Display Text Editing and Keyboard Controls Display Behavior Configuration Menus Other Soft Key Choices Messages and Prompts
70. Service Manual Tektronix PQA300 Picture Quality Analysis System 071 0914 00 This document applies to firmware version 1 00 and above Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service www tektronix com Copyright Tektronix Inc All rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved JNDmetrix is a trademark of Sarnoff Corporation Tektronix Inc P O Box 500 Beaverton OR 97077 TEKTRONIX and TEK are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If a product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be r
71. Theory of Operation Functional Operation Hardware Implementation Data Flow Functional Block Overview PQA300 Picture Quality Analysis System Service Manual xi xiii XV XVI XVI xvii xvii xvii xvili xvili xvili xvili xix oboe eR Ree Odo dod o 1 5 DD LUE EL D PRR PR PRR PR insta WWWNNRFPOAMNNKNFE DDRRRD D NR RP RRP Re Table of Contents Composite Generator Configurations 3 Composite Analyzer Configuration 3 DSP System Operation 00 cece cee n hn 3 Serial Digital I O Block Description 3 DSP Block Description PELBIS TOEIC ng h iste 0 0 weds adore dees Gide okt sr Boot ROM Por m Composite Decoder Input 255 eret d ram Aland a ns Gb anim EA oq rad Calibration Generator SYO SIPPE P dre ren a ire autant tr renal A D Converters WC COGEK 52 24 Ko teacher ei ornare ds ce D ed drone eee ose FPGA P Em COLOR Lock 5 T A us ed ah da due A Parallel to Serial Converter PCLI Intetfaee 252 iere tO Ide cie ed etta mac edo era d Composite Encoder Serial Receiver Encoder ANUA EE LE D D ND ND H 9 0 JS 02 029 02 U2 02 02 O2 02 WWW WW Ww i fe ee p
72. U Poe Ne Em Torque the screws to 8 in Ibs Mainframe Modules Removing the bezel permits access to the retaining screws that hold the front panel components in place so that you can remove and replace them without removing the mainframe cabinet The standard instrument has a blank front panel The local control option instrument has a flat panel display and keypad installed The procedures for these two configurations are similar use the correct procedure for your PQA300 configuration Removing the Interface Remove the front panel interface circuit board cover assembly as follows Circuit Board Cover 1 Remove the front panel bezel see Removing the Bezel Trim Ring on page 6 4 for the removal procedure 2 Remove the six screws attaching the front panel circuit board cover to the chassis There are two screws at the top two at the bottom and two at the left side of the assembly see Figure 6 4 3 Pull the cover assembly away from the chassis PQA300 Picture Quality Analysis System Service Manual 6 9 Maintenance Figure 6 4 Front panel circuit board cover removal Reinstalling the Front Make sure all the cables to the interface assembly are properly connected before Panel Interface Circuit replacing the interface circuit board cover assembly After that use the following Board Cover procedure to replace the cover assembly 1
73. V 2 7W 83 CFM 56 8 DBA 2850 RPM 92MM X 92MM X 25MM W 2 PIN CONNECT PWR SUPPLY ASSY CABLE ASSY SP SPEAKER CPD 30 26AWG 10 0 L 1X2 0 1 CTR RCPT FEMALE LATCHING PLZ MTE AMP 103961 PQA300 Picture Quality Analysis System Service Manual Mfr code 80009 80009 0KB01 06915 TK1943 TKOAT 0KB01 OADN8 0D1M6 61058 80009 060D9 Mfr part number 671 4778 00 671 4778 01 ORDER BY DESCRIPTION RN 300 2 441 2180 00 869516 1 ORDER BY DESCRIPTION 06GENGS3E 055013 FBA09A12H 650 3760 01 174 3795 00 8 5 on b Qc T CAW e eX A e e Ly 6 Replaceable Parts PQA300 Picture Quality Analysis System Service Manual Figure 8 1 Chassis parts 8 6 Replaceable Parts Replaceable parts list Fig amp index number 8 2 1 a A wo N N Q 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Tektronix part number 671 4793 00 407 4699 00 672 1551 01 407 4705 00 131 0890 01 671 5392 50 407 4813 00 671 4797 00 211 0722 00 407 4716 00 671 5390 50 407 4752 00 407 4715 00 211 0747 00 407 4710 01 407 4841 00 119 6175 00 119 6175 01 348 1567 00 211 1079 00 211 0950 00 211 1070 00 407 4721 02 119 6106 00 348 1432 00 119 5728 01 671 4377 00 Serial no effective B010119 B010108 Serial no discont d B010118 B010107 Qty Name amp de
74. When you run the tests the results are displayed in the Results box with the name of the test and the pass or fail result of the test The Encoder Diagnostics need more time to complete than the Decoder diagnostics Use the scroll bar to view the completed test results Encoder Auto Cal The automatic calibration routine compensates the adjustments of the encoder module for temperature changes and aging Typically you would use this feature about every six months to maintain optimum encoder operating Another good time to use it would be if the Encoder diagnostic tests start showing soft failures failures that occur with temperature changes The PQA300 must be allowed to completely warm up about 20 minutes before the using the automatic calibration feature Help Menu The POA300 Picture Quality Analysis System has a Windows based help system You can obtain general help on the PQA300 using the Help choice in the Other soft key selection list The Help Topics contents screen shown in Figure 2 13 is displayed You can use the contents help screen to navigate through the user interface for information entirely within the help system PQA300 Picture Quality Analysis System Service Manual 2 17 Operating Information Encoder Decoder Diagnostics amp Auto Cal x Decoder Diagnatics eee plaa coe Help Encoder Diagnostics Encoder Auto Cal Results Data path from FPGA thru EDH coproc test Comb memory connection lest
75. able gate array FPGA device that handles switching clipping and dithering to reduce truncation effects The FPGA device is programmed with the logic to handle the operation of the decoder module Operating modes of the decoder module are set by filling the appropriate registers on the decoder board through the PCI bus at the time a decoder operation is started The Chroma portion of the clamped video or the chroma from the S Video signal is applied to a Color Lock ASIC that controls the phase of the 27 MHz VCO voltage controlled oscillator The VCO output is then used throughout the decoder module as the clocking signal The 27 MHz clock signal also drives a circuit DDS direct digital synthesizer that develops the Fsc subcarrier frequency The Fsc circuit is reset every color frame to correct for any slight frequency errors The Fsc output completes the phase lock loop back to the Color Lock ASIC The data bits are serialized in Rec 601 format and applied to the 601 Out connector on the rear panel of the decoder module The 601 serial digital signal is externally connected to analyzer DSP input for capture and analysis The PCI Interface circuitry connects the encoder module to the host processor A programmable logic device contains the logic circuitry to address the chips on the decoder module Addressing and data transfers to the devices on the module from the host processor is handled by the PCI interface The PCI interface is confi
76. ailed operating instructions refer to the Windows NT manuals and the PQA300 Picture Quality Analysis System User Manual Perform the procedure once every 2000 hours of operation or every 12 months to ensure that the performance is within tolerance The tests in this section comprise an extensive valid confirmation of perfor mance and functionality when the following performance conditions have been met m The instrument must be in an environment with temperature altitude humidity and vibration within the operating limits described in the Specifications section m The instrument must have had a warm up period of at least 20 minutes Table 4 1 lists the test equipment needed to complete the Performance Verifica tion procedure The table identifies examples and minimum tolerances where applicable If you substitute other equipment for the examples listed in Table 4 1 the equipment must meet or exceed the tolerances PQA300 Picture Quality Analysis System Service Manual 4 1 Performance Verification 4 2 Table 4 1 Required equipment list Test equipment Serial digital video monitor Test Oscilloscope Matching Pad Frequency Counter with 1 MQ probe 75 Q coaxial cables 2 75 Q SMB to BNC adapter cables 2 S Video signal cable S Video to dual BNC adapter cable 75 feed through termination BNC dual female connector BNC to dual binding post adapter Minimum requirement Receives and displays
77. ale D sub connector to support RS232 serial port Compliant to EIA TIA 574 Pin Assignments RS232 1 DCD 6 DSR 2 RXD 7 RTS 3 TXD 8 CTS 4 DTR 9 RI 5 GND Pin Assignments RS485 1 RXD 6 CTS 2 RXD 7 RTS 3 TXD 8 CTS 4 TXD 9 RTS 5 GND 1 10 PQA300 Picture Quality Analysis System Service Manual Specifications Table 1 5 Rear panel interface Cont Characteristic SVGA Output Port USB Port Ethernet Port Description 15 pin female high density D sub SVGA connector Compliant with EIA RS 343A Selectable 640 X 480 VGA 800 X 600 and 1024 X 768 SVGA Pin assignments 1 Red 2 Green 3 Blue 4 NC 5 GND 6 AGND 7 AGND 8 AGND Series A USB receptacle Pin assignments 1 Vbus 2 Data 9 key 10 GND 11 NC 12 NC 13 HSYNC 14 VSYNC 15 NC 3 Data 4 GND 10 Base T 100 Base T on PCI bus RJ45 Connector Plug amp Plan compatible Bus master mode RJ45 Pin assignments 1 TX 5 NC 2 TX 6 RX 3 RX 7 NC 4 NC 8 NC Table 1 6 Side panel interface characteristics Characteristic Description Mouse Port PS2 compatible mouse port utilizing a mini DIN connector Pin assignments 1 data 4 45 V 2 NC 5 clock 3 ground 6 NC Keyboard Port PS2 compatible keyboard port utilizing a mini DIN connector Pin assignments 1 data 4 45 V 2 NC 5 clock 3 ground 6 NC USB Port Series A USB receptacle Pin assignments 1 Vbus 3 Data 3 d
78. allel video Loop ChB Out Through Ch A In Active Loop Ch A Out Through 601 Out A Reclocking Deserializer 1 0 ASIC Parallel video Main Deserializer Input Multiplexer Reclocking Serializer Clk Video Data 63 0 Figure 3 7 Digital signal pro PCI FIFO Host Data 81 0 cessor module I O section simplified block diagram Ch A In The Ch A In connector feeds a cable equalizer through a return loss matching network A carrier detect output from the cable equalizer is fed to the status port so the system can determine if an input is present The software looks at the carrier detect bits before attempting to use either the Ch A In or the Ch B In input as the signal source PQA300 Picture Quality Analysis System Service Manual 3 9 Theory of Operation The output of the cable equalizer drives the active loop through output driver and the input multiplexer The other inputs to the input multiplexer are from the other channel and from the output to allow loopback for self test Only the primary input to the I O ASIC has timing extraction There is a 3 1 input multiplexer into the main deserializer This allows either input to be used in single channel mode with the data coming through the main deserializer The second deserializer will only be active in two channel mode If both input channels are being used simultan
79. and frame indicators and provides the information needed for shift correction and normalization of the captured sequence The PQA300 analyzer compares the normalized captured sequence with a stored reference sequence and derives the picture quality measurements The functional operation of the PQA300 system is shown in Figure 3 2 PQA300 User Supplied Picture Quality Analysis System pad SVGA Monitor Rec 601 NTSC or PAL Video sequence Special video test fidelity measurement sequence Pre recorded reference test sequence Figure 3 2 Functional operation diagram The PQA300 system receives transported video sequences encoded in serial Rec 601 NTSC PAL or S Video The system must have a copy of the original test sequence stored internally Video sequence fidelity measurements are performed by comparing the normalized transported sequence to the copy of the original sequence Live incoming video can also be displayed to monitor the transport stream Visual assessment of quality degradation can be made by displaying selected segments of the original test sequence and the transported test sequence along with associated difference maps on an optional external 601 digital monitor display Hardware Implementation The analyzer generator encoder and decoder card are implemented in plug in modules on a PCI bus connected to a PC NT system through a PCI bridge The PC NT system has enough memory disk space and mainframe computing
80. arallel video is clocked out of the FIFO circuit to an encoder ASIC using the internal 27 MHz clock The encoder develops the video as Y C component output The Y C output is processed through the DAC the low pass filter and the output amplifier The Y and C outputs are applied to a summing circuit to obtain the composite video output signal The genlock circuitry on the encoder board is similar to the color lock circuitry on the decoder board shown in Figure 3 9 A sync stripper circuit in the genlock circuitry develops a clamped video output along with composite sync The Chroma portion of the clamped video is stripped and applied to a Chroma subcarrier lock ASIC that controls the phase of the 27 MHz VCO voltage con trolled oscillator The VCO output is then used throughout the encoder module as the clocking signal PQA300 Picture Quality Analysis System Service Manual 3 15 Theory of Operation 601 In from Generator S Video Out Analog Composite Out Genlock Analog Ref In Serial Black Burst to Generator Serial Black Burst PCI Interface Data Serial Receiver Recovered Clk DAC Encoder Filters and Output Amplifiers Color Field Ref Genlock Burst lock and 27 MHz Clock Serial Black Burst Generator Parallel to Serial PCI Converter Interface PCI Bus Figure 3 10 Encoder simplified block diagram The 27 MHz clock signal also drives a circuit that develops the Fsc subca
81. ard into the slot 12 position in the mainframe card bay 1 PQA300 Picture Quality Analysis System Service Manual Dress both controller board wire harnesses so that you can insert the I O circuit board into the first slot as shown in Figure 6 16 Hold the SCSI ribbon cable against the side of the mainframe and insert the T O board into the slot Align the front end of the circuit board with the guide rail on the front of the card bay Lower the I O board into the mainframe slot but do not press the board into the backplane connector Route the CD drive ribbon cable over the I O board Lift up the I O board and with one hand bracing the circuit board on the backside plug the CD drive ribbon cable onto J250 of the I O board Place your fingers on the top of the I O board at the locations indicated in Figure 6 17 directly over the J11 backplane connector and press down to seat the board into the backplane connector 6 27 Maintenance CD Drive ribbon cable plugs onto J250 IO Circuit board with cables installed Figure 6 16 Insert 1 0 board into slot 12 6 28 PQA300 Picture Quality Analysis System Service Manual Maintenance M Press rm on I O boa at these two locations S LI o 0 u TUM SCSI Ribbon cable Figure 6 17 Installing the 1 0 circuit board Connect I O board to Controller board The interconnection cables between the I O board and the control
82. arness through mainframe chassis hole as shown in Figure 6 12 2 Attach the speaker to the chassis with four T15 screws Torque the screws to 8 in Ibs Plug speaker connector here Speaker Figure 6 12 Speaker installation and fan locations 3 Route the speaker wire harness through the top left opening in the front ventilation holes 4 Reconnect the speaker wire to the front panel interface board Speaker connector J980 see Figure 6 22 on page 6 33 6 20 PQA300 Picture Quality Analysis System Service Manual Maintenance Removing and Replacing The disk drives are installed in the lower compartment of the mainframe chassis the Dual SCSI Hard The mainframe cabinet must be removed to access the disk drive assemblies Disk Drives 1 Besure to wear a static grounding wrist strap 2 Shut down the mainframe and unplug the power cord 3 Remove the mainframe cabinet see Removing the Cabinet on page 6 5 for the removal procedure 4 Place the mainframe chassis on the work surface so that the bottom side with the SCSI disk drive assembly is facing up 5 Disconnect the SCSI disk drive cable from both hard disk drives Unclip the cable from the hold down clips on the assembly plate Note the routing and cable dress for reinstallation 6 Disconnect the power supply cable from both hard disk drives 7 Remove the six T 15 Torx screws that hold the ass
83. ata 4 GND PQA300 Picture Quality Analysis System Service Manual Specifications Power Specifications Table 1 7 AC power source characteristics Characteristic Description Source Voltage 100 VAC to 240 VAC 50 60 Hz continuous range CAT II Fuse Rating 8 A Fast 250 V Maximum Power Consumption 330 Watts max 145 Watts typical Steady State Input Current 6 Amps max 1 25 Amps RMS typical Inrush Surge Current 36 Amps maximum Power Factor Correction Yes Mechanical Physical Characteristics Table 1 8 Mechanical characteristics Characteristic Description Classification Transportable platform intended for either rackmount or bench lab based applications Overall Dimensions Height 8 5 inches w o feet 21 6 cm Width 17 inches 43 2 cm Depth 22 inches 55 9 cm Weight 42 Ib 19 1 kg Shipping Weight 64 Ib 29 1 kg Construction Materials Chassis parts are constructed of aluminum alloy and aluminized steel front panel and trim pieces are constructed of plastic circuit boards are constructed of glass and or ceramic glass laminate PQA300 Picture Quality Analysis System Service Manual Specifications Environmental Characteristics Table 1 9 Environmental characteristics Characteristic Cooling airflow Required Clearance Use Rating Atmospherics Temperature Operating Non operating Humidity Operating Non operating Altitude Operating Non Operating Description Intak
84. atching reference file is found and the measurements you have selected are done 15 16 17 Either give the test an alias name or leave the test name edit field blank If left blank a default file name is given to the captured sequence when it is saved Click the OK button to accept the changes and exit the menu Right click the Measure soft key to display the Measure Configuration menu PQA300 Picture Quality Analysis System Service Manual Performance Verification 18 The captured sequence is the default choice to measure 19 Select POR Luma POR Luma amp Chroma and PSNR Luma in the Picture Quality Measurement box 20 Click the OK button to accept the changes and exit the menu Unimpaired 1 Click the Generate soft key to start generating the Mobile test sequence Sequence Test Click the Capture soft key to start the capture operation 3 Check that the test sequence is displayed on the external serial digital monitor to verify the Channel A Out active loop through 4 Wait for the test sequence to be captured The message Captured sequence stored with the name format and file extension is displayed when the capture is done Note the time stamp of the sequence just stored for future reference If you have several sequences of the same name only the time stamp distinguishes one from another 5 Click the Measure soft key to start the measurement You should see the POR map of each field as it
85. ation menu for S Video Figure 4 16 Connections for the decoder 601 output check Figure 4 17 Encoder Configuration menu Figure 4 18 Hardware settings menu Figure 4 19 Encoder Decoder diagnostics and Encoder Au to Cal au 5 26 acaba boo be DO X OU EE RR E SUA RR Re Beg eae Figure 4 20 Setup for Composite video luma Y and chroma C gain and offset io vr eR C Ier er eR wer Figure 4 21 PQA encoder decoder dialog box Figure 4 22 Encoder diagnostics selection menu Figure 4 23 Setup for S Video luma Y and chroma C gain and Dime aya fou 1b ws N AN E T E NES Figure 4 24 Connections for Serial Black Out and Genlock check Figure 4 25 Oscillator test point for frequency check Figure 5 1 27 MHz clock test point for frequency adjustment Figure 5 2 Locating the decoder and encoder circuit boards Figure 5 3 Location of TP75 the 1 250 V encoder auto cal reference test point Figure 5 4 Hardware settings menu Figure 5 5 Encoder Decoder diagnostics and Encoder Auto Cal 4 24 4 27 4 31 4 33 4 34 4 36 4 36 4 37 4 38 4 39 4 40 4 42 4 44 5 3 5 5 5 5 5 6 5 7 PQA300 Picture Quality Analysis System Service Manual Table of Contents Figure 5 6 Decoder board LED indicator locations 5 8 Figure 5 7 Decod
86. ay and a keyboard and mouse for user command inputs See Figure 1 1 on page 1 1 for the connector locations You can connect the keyboard and mouse either to the rear panel connectors or to the left side connectors 2 Press the On Stby switch to power on the instrument see Figure 4 1 for the switch location When you power on the PQA300 it initializes and starts the PQA300 application without the need to enter a user name and password as normally required for a Windows NT operating system Tektronix P On Stby switch Figure 4 1 On Stby switch 3 When the PQA300 application starts click on the X in the upper right corner of the PQA300 application window to stop the PQA300 application PQA300 Picture Quality Analysis System Service Manual 4 3 Performance Verification Load the Impaired Test Sequences 4 4 NOTE The PQA300 uses automatic login with the user name of Administrator and the password of PQA300 No other user can log in while the autologin property of the application is enabled If it becomes necessary to disable the automatic login you must run the Regedit registration edit program and set the HKEY_LOCAL_MACHINE SOFT WARE Microsoft Windows NT CurrentVersion Winlogon AutoAdminLog value to 0 It must be reset to 1 to enable automatic login See Configure for Auto Boot Up in Appendix C 4 Ifautolog
87. cated on the digital voltmeter 11 Move the 75 Q feed through termination from the S Video Y channel connector back to the Composite Output cable connector PQA300 Picture Quality Analysis System Service Manual 4 39 Performance Verification 4 40 PQA300 rear panel 5 9 Digital O 3 Voltmeter oO R O o Ip 75 Q feed through terminator S Video Input Input Y channel Encoder S Video Out S Video to dual BNC adapter cable S Video BNC barrel BNC to dual binding C channel connector post adapter Figure 4 23 Setup for S Video luma Y and chroma C gain and offset 12 Record the composite luminance amplitude indicated on the digital voltmeter 13 Compute the net result the difference between composite blanking and composite luminance levels for Composite video Check that the result is 700 mV 7 mV 14 Compute the net result the difference between S Video blanking and S Video luminance levels for the S Video signal Check that the result is 700 mV 14 mV PAL Chrominance Gain and DC Offset 1 In the encoder diagnostics window select PAL Chroma Low and press GO 2 Record the composite output minus chroma level indicated on the digital voltmeter The expected value is near 350 mV 3 Move the 75 Q feed through termination from the Composite Output coaxial cable connector to the S Video C chan
88. ces for 601 625 format C 2 Table C 3 Impaired video test sequences disk C 2 PQA300 Picture Quality Analysis System Service Manual ix Table of Contents x PQA300 Picture Quality Analysis System Service Manual CE General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it To avoid potential hazards use this product only as specified Only qualified personnel should perform service procedures To Avoid Fire or Use Proper Power Cord Use only the power cord specified for this product and Personal Injury certified for the country of use Ground the Product This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor must be connected to earth ground Before making connections to the input or output terminals of the product ensure that the product is properly grounded Provide Proper Ventilation Refer to the manual s installation instructions for details on installing the product so that it has proper ventilation Observe All Terminal Ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Do Not Operate Without Covers Do not operate this product with covers or panels removed Use Proper Fuse Use only the fuse
89. chassis PQA300 Picture Quality Analysis System Service Manual 6 15 Maintenance 6 Disconnect the floppy drive cable from the floppy drive connector Lift up the locking latch on the floppy drive connector to release the interconnection cable and pull up on the cable to separate it from the connector 7 Disconnect the audio cable from the CD drive four pin connector see Figure 6 11 8 Disconnect the CD drive cable from the Controller board 9 Disconnect the CD drive cable from the CD drive connector adapter board 10 Slide the CD and Floppy Disk Drive assembly out through the front of the chassis You may have to lift the front of the assembly slightly to clear the EMI shielding fingers Removing and Replacing The floppy disk drive and the CD drive are assembled in the same unit but can the CDROM Drive be separately replaced 1 Remove the four crosstip screws that hold the CD drive to the chassis 2 Slide the CD drive out of the lower bay of the CD and floppy drive chassis Figure 6 9 Chassis screw locations for CD drive 6 16 PQA300 Picture Quality Analysis System Service Manual Maintenance Reinstall the CD Drive 1 2 3 4 Install the CD connector adaptor board Insert the CD drive into the lower bay of the CD and floppy drive chassis Align the CD drive mounting holes with the chassis holes Attach the CD drive to the chassis with four crosstip screws Torque the screws to 2 in lbs Removin
90. ckmount kit to install the rackmount cradle in a standard rack and to install the PQA300 in the cradle CAUTION For rack mounting the product must be installed in its specified rack cradle as listed in Table 2 2 For proper cooling the air temperature at all air intake vents inside the rack must not exceed 40 C Before you can operate the product you must connect the provided power cord Refer to Figure 2 1 to connect the power cord to the instrument Refer to Table 2 1 for the supply voltage rating and connect the other end of the power cord to the proper source Do not connect to any power sources other than those for which the instrument is rated For a complete specification list refer to Appendix A Specifications CAUTION Keep the bottom of the instrument clear of obstructions to ensure proper cooling PQA300 Picture Quality Analysis System Service Manual 2 1 Operating Information Power Input 1 Input 2 Input 3 Alarm relay Ethernet Printer outputs o 8 o Oe e 9o ee e oello
91. dard ANSI Y1 1 1972 The table titled Manufacturers Cross Index shows codes names and addresses of manufacturers or vendors of components listed in the parts list Address City state zip code CUSTOMER SERVICE DEPT HARRISBURG PA 17105 3608 PO BOX 3608 3000 COLUMBIA HOUSE BLVD SUITE 1 VANCOUVER WA 98661 17303 RIDGELAND AVE TINLEY PARK IL 60477 3048 5825 N TRIPP AVE CHICAGO IL 60646 P O BOX 804238 01963 CHERRY ELECTRICAL PRODUCTS CO 3600 SUNSET AVENUE WAUKEGAN IL 60087 3214 9175 DEERING AVE CHATSWORTH CA 91311 3000 COLUMBIA HOUSE BLVD SUITE 1 VANCOUVER WA 98661 4405 CUSHING PARKWAY FREMONT CA 94538 OADN8 DELTA PRODUCTS CORP DPZ PQA300 Picture Quality Analysis System Service Manual Replaceable Parts Manufacturers cross index Cont Mfr code Manufacturer 0B445 ELECTRI CORD MFG CO INC 0DiM6 NMB TECHNOLOGIES INC 0KBO1 STAUFFER SUPPLY CO 0KBO5 NORTH STAR NAMEPLATE INC 12136 PHC INDUSTRIES INC 1AW87 LEWIS SCREW CO 22670 GM NAMEPLATE INCORPORATED 26233 NYLOK FASTENER CORP 2K262 BOYD CORPORATION 2W733 BELDEN WIRE amp CABLE COMPANY 30817 INSTRUMENT SPECIALTIES CO INC 3M099 PORTLAND SCREW COMPANY 46628 LOGITECH INC 4T165 NEC ELECTRONICS INC 50356 TEAC AMERICA INC 52152 3M COMPANY 54407 POWER ONE INC 5F520 PANEL COMPONENTS CORP 5Y400 TRIAX METAL PRODUCTS INC 61058 MATSUSHITA ELECTRIC CORP OF AMERICA 64409 DIVERSIFIED TECHNOLOGY INC 7X318 KASO PLASTICS INC 80009 TEKTRONIX INC 8012
92. digital video The DSP module can output processed program output video in Rec 601 serial format The 601 Out connector of the generator DSP provides test video sequences to a device or system under test The 601 Out connector of the analyzer DSP provides serial digital component video that can be viewed on a high resolution external digital video monitor The DSP system is made up of two DSP processors a 128 MB of single cycle SDRAM main memory a boot ROM a 64 kB shared memory some control PQA300 Picture Quality Analysis System Service Manual Theory of Operation and status registers a PCI FIFO first in first out and an I O Video ASIC Video from the ASIC application specific integrated circuit is transferred in 1kB blocks into memory to form fields The analyzer and generator DSP modules are identical Their operation as an analyzer or as a generator is software controlled Serial Digital I O Block The serial digital I O system comprises two serial input connectors Ch A In and Description Ch B In Active Ch B In and associated deserializers two serial active loop through connectors Ch A Out and Ch BOut and associated amplifier a serial output connector 601 Out and associated serializer and a clock generator The Ch A In Ch A Out and 601 Out connectors are BNC The Ch B In and Ch B Out connectors are SMB A simplified block diagram of the I O section of the DSP module is shown in Figure 3 7 Ref Par
93. do the following tasks m Generate video test sequences in serial digital component and with Option 01 composite analog signal formats m Capture video test sequences in serial digital component and with Option 01 composite analog signal formats W Create generate and reference video sequences from your selected program material to use for POR and PSNR measurements m Make POR and PSNR picture quality measurements on captured and stored video test sequences m Compare results from multiple measurements m Select an area of the fields and or a range of fields on which to make picture quality measurements m Display live video on an SVGA monitor m Display reference video captured video and result maps POR and PSNR on screen with option LC on an SVGA monitor or on a serial digital video display monitor using the 601 serial digital output m Display a selected field of the reference sequence captured sequence or results map m Set the brightness and contrast of the picture difference results map displays PQA300 Picture Quality Analysis System Service Manual Specifications Display measurement results in various modes graphs details summary and picture difference maps with rapid switching through the results display modes to compare data Designate trace colors for the results graphs Choose to apply preprocessing corrections to the detected gain level shift and cropping prior to making measuremen
94. drive insert the cable into the floppy drive connector as shown in Figure 6 11 c Support the edge of the circuit board and push the locking latch closed Line up the attaching screw holes and install the three attaching screws two in the front and one in the rear of the assembly PQA300 Picture Quality Analysis System Service Manual Maintenance we Audio cable Floppy drive dc Audio connector adim CDROM Interface board Contacts face toward floppy drive Se Figure 6 11 Floppy disk drive and CD audio connector installation Speaker Removal The front bezel front panel interface cover and keypad assembly must be uninstalled to remove the speaker for replacement 1 Remove the front panel bezel refer to Removing the Bezel Trim Ring on page 6 4 for the removal procedure Remove the front panel interface circuit board cover refer to Removing Interface Circuit Board Cover on page 6 9 Remove the blank keypad assembly refer to Removing the Blank Key Pad Assembly on page 6 11 Disconnect the speaker connector from the front panel interface board see Figure 6 22 on page 6 33 Remove the four T15 screws that attach the speaker to the chassis and remove the speaker from the chassis Note the routing of the speaker cable for reinstallation PQA300 Picture Quality Analysis System Service Manual 6 19 Maintenance Speaker Replacement 1 Route the speaker wire h
95. e Video Sequences You can select live video a captured video sequence or a stored video sequence file to display using the menu choices associated with the playback configuration menu refer to Playback Configuration Menu in the PQA300 Picture Quality Analysis System User Manual for configuring informa tion PQA300 Picture Quality Analysis System Service Manual Operating Information Results Displays You can view measurement results as a summary as field by field details as a graphical display or as a video picture difference sequence You can use the measurement results to determine overall picture quality or to examine specific fields of a video sequence for problem areas External Display You can connect a serial digital component video monitor to the 601 digital picture monitor output to view the POR and PSNR picture difference maps at full resolution In addition you can view input signals and captured signals in full digital component video resolution You can configure the external digital picture monitor display in a display configuration menu Access the external display configuration menu by clicking the right mouse button on the 601 Display soft key to bring up the menu window Configuration Menus All the configuration menus are accessed by a click of the right mouse button a long click and hold of the left mouse button also works Refer to Soft Key Controls on page 2 9 Refer to the PQA300 Picture Quality Analy
96. e SMB Channel B In and Channel B Out connectors on the analyzer and generator are used for making connections to the Option 01 encoder and decoder modules You can check the Channel B In and Channel B Out loop through connectors for both the analyzer and the generator is the same manner as done for the Channel A In and Channel A Out loop connectors You need two BNC to SMB adapter cables to make the signal connections needed 1 Use the generator 601 Out connector to supply an input signal to the analyzer Channel B In Measure the peak to peak amplitude of the Chan nel B Out signal using the same procedure steps as in Check the Analyzer Channel A Out Loop Through Amplitude on page 4 16 Use the analyzer 601 Out connector to supply an input signal to the generator Channel B In Measure the peak to peak amplitude of the Channel B Out signal using the same procedure steps as in Check the Generator Main Loop Through on page 4 19 PQA300 Picture Quality Analysis System Service Manual Performance Verification Option 1 Performance Verification Run Encoder and Decoder Diagnostics Performance verification of the Option 01 encoder and decoder modules consists of running the encoder and decoder user diagnostics and then making POR and PSNR picture quality measurements on unimpaired and impaired video test sequences The measurements are first made using a supplied test video sequence as the reference to verify the overall system That same
97. e and to give you the benefit of the latest improvements Therefore when ordering parts it is important to include the following information in your order W Part number m Instrument type or model number m Instrument serial number Instrument modification number if applicable If you order a part that has been replaced with a different or improved part your local Tektronix field office or representative will contact you concerning any change in part number Modules can be serviced by selecting one of the following three options Contact your local Tektronix service center or representative for repair assistance Module Exchange In some cases you may exchange your module for a reman ufactured module These modules cost significantly less than new modules and meet the same factory specifications For more information about the module exchange program call 1 800 833 9200 Outside North America contact a Tektronix sales office or distributor see the Tektronix web site for a list of offices www tektronix com Module Repair and Return You may ship your module to us for repair after which we will return it to you New Modules You may purchase replacement modules in the same way as other replacement parts PQA300 Picture Quality Analysis System Service Manual 8 1 Replaceable Parts Using the Replaceable Parts List Parts List Column Descriptions Column Column name 1 Figure amp Index Number 2 Tektronix Part Numbe
98. e cabinet go under the tabs You may have to push on the sides of the cabinet to get all the edges under the tabs and over the EMI strips around the front of the chassis PQA300 Picture Quality Analysis System Service Manual Maintenance 6 At the rear of the chassis you may have to push on the sides of the cabinet to get the rear of the cabinet to fit over the edges of the chassis and EMI gasketing When the cabinet is completely in place on the chassis install the four rear feet Position the handle on the left side of the chassis and replace the two screws that attach the handle to the chassis see Figure 6 1 Replacingthe There are three snaps across the top and three across the bottom that hold the Bezel Trim Ring bezel to the cabinet Replace the front panel bezel as follows 1 If the light pipes are out replace them now Insert the light pipes in the light pipe holes and turn them clockwise until they snap into place Position the bezel trim ring over the front of the cabinet and engage the three snaps across the top of the cabinet first After you have engaged the snaps across the top firmly press the bottom of the bezel onto the cabinet to engage the snaps across the bottom of the bezel Press on the top of the bezel again to make sure the top snaps are all completely engaged Using smooth jaw pliers to hold the key cap position the On Stby key cap on the switch shaft Push straight in on the key cap to pre
99. e click on the PQA300 icon to start the application Right click the Preference soft key to display the Preference Configuration menu Click the down arrow in the Startup Presets name field Click on the factory preset to select it Click OK to accept the change and exit the menu Click the Preference softkey to restore the factory configuration settings Right click the Generate soft key Select the correct signal type for the test NTSC NTSC No Setup or PAL It is suggested that you do the first functional verification test using the format that you expect to use most or exclusively You can elect to test for each of the signal types for a more thorough functional check Select to generate the Mobile sequence Click OK in the Generate Configuration menu to accept the changes and exit the menu Right click the Capture soft key to display the Capture Configuration menu Select the correct signal type for the test NTSC NTSC No Setup or PAL Select Mobile as the reference sequence Set Capture As to Test Give the capture test an alias file name you can remember as you do the verification tests For example call the reference captured for NTSC Mobile NTSC Test and a reference captured for PAL Mobile PAL Test Click OK in the Capture Configuration menu to accept the changes and exit the menu Right click on the Measure soft key When a new test is captured it is the default choice to measure PQA300 Picture Qua
100. e composite video sequence is displayed correctly on the video monitor 13 Set up the test oscilloscope as shown in Table 4 5 on page 4 12 14 From the test oscilloscope record the CH 1 High amplitude of the digital waveform The value is approximately 400 mV 4 42 PQA300 Picture Quality Analysis System Service Manual Performance Verification 15 In the test oscilloscope Trigger menu set the polarity to negative After the measurement stabilizes record the CH 1 Low amplitude of the digital signal waveform 16 Add the absolute values of the low and high amplitudes of the waveform 17 Check that the sum of the high and low amplitude measurements is within the range of 723 mV to 877 mV The measurement uncertainty due the accuracy of the example test equipment is taken into consideration in this range to verify that the output is within the allowable limits of 800 mV 100 mV Check the DSP 27 MHz Clock Frequency Use the following procedure to check the oscillator frequency of the analyzer and generator DSP modules Test Equipment Setup 1 Set up the test equipment Table 4 14 Frequency counter setup Feature Mode Status Measure Freq Limits Run Channel 1 Connected Trigger Sensitivity OFF Input impedance 50 Q 1 M 1MQ Input coupling DC AC AC Attenuation x10 Atten OFF Filter 10 kHz Filter OFF 2 Be sure that you wear a static grounding wrist strap 3 Turn off power to the system 4 Re
101. e is from the front and sides of the instrument Exhaust is to the bottom and rear of the instrument 2 in 50 mm air space adjacent to the bottom of the instrument is required Rated for indoor use only 5 C to 40 C 41 F to 104 F 30 C 54 F hr max gradient non condensing derated 1 C or 1 8 F per 1 000 ft or 305 m above 5 000 ft or 1524 m altitude 20 C to 60 C 4 F to 140 F 30 C 54 F hr max gradient without disk media installed in disk drives 20 to 80 relative humidity non condensing Max wet bulb temperature 29 4 C or 84 9 F derates relative humidity to 46 at 40 C or 104 F 8 to 80 relative humidity non condensing Max wet bulb temperature 40 C or 104 F derates relative humidity to 54 at 50 C or 122 F 2000 meters maximum Up to 40 000 ft 12 190 m PQA300 Picture Quality Analysis System Service Manual 1 13 Specifications Certification and Compliances Table 1 10 Electromagnetic compatibility Category EC Declaration of Conformity EMC Australia Declaration of Conformity USA FCC Compliance Standards or description Meets the intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliances were demonstrated using EN 61326 1997 EMC Product Family Standard for Electrical Equipment for Measurement Control and Laboratory use Emissions EN 61326 Class A Radiated and Conducted Emissions EN 61000 3 2 A14 Conducted Power Li
102. e modules and components m How to remove and replace modules m Diagnostic and Troubleshooting information and procedures Options provides a brief description of the available options for the PQA300 system Replaceable Parts gives all module and mechanical parts that comprise the PQA300 system The appendices consist of the following items m Appendix A provides the procedure to follow if the operating system software needs to be repaired Installing the application software and loading the video test sequences are also explained m Appendix B describes the PQA300 application directory structure and the supporting files m Appendix C provides a listing of the 601 525 and 601 625 video test sequences on each of the CD ROM disks The scene characteristics are also given PQA300 Picture Quality Analysis System Service Manual xv Preface Related Manuals The PQA300 Picture Quality Analysis System user documentation consists of the following m The PQA300 Picture Quality Analyzer User Manual details how to operate this picture quality analysis system Manual Conventions The following terms and conventions are used throughout this manual m The terms instrument and system refer to the POA300 Picture Quality Analysis System xvi PQA300 Picture Quality Analysis System Service Manual Introduction This manual contains maintenance information for the PQA300 Picture Quality Analysis System You should read this introduction
103. e nor humidity is controlled The area is protected from direct sunshine rain or direct wind European Union Compliance Compliance was demonstrated to the following specification as listed in the Official Journal of the European Union Low Voltage Directive 73 23 EEC amended by 93 68 EEC EN 61010 1 A2 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use Listing by a U S Nationally ANSI ISA S82 01 Safety Standard for Electrical and Electronic Test Measuring Recognized Testing Laboratory Controlling and Related Equipment 1994 Canadian Certification CAN CSA C22 2 No 1010 1 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use PQA300 Picture Quality Analysis System Service Manual 1 15 Specifications Table 1 11 Environmental limits and use classification for safety certification compliance Cont Category Additional Compliance Installation Overvoltage Category Laser Classification 1 16 Standards or description UL3111 1 Standard for Electrical Measuring and Test Equipment IEC61010 1 A2 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use Terminals on this product may have different installation overvoltage category designations The installation categories are CAT IIl Distribution level mains usually permanently connected Equipment at this level is typically in a f
104. e one you use for the majority of your testing If you choose you can redo all the tests in each of the video formats to verify the operation In each step of the tests select a different format than you used for the original testing For example if you used PAL format for the first test select NTSC or NTSC No Setup The expected measurement results for the impaired sequence testing are provided for each level of impairment of the provided impaired test sequences PQA300 Picture Quality Analysis System Service Manual Performance Verification Decoder 601 Out The 601 Out signal amplitude is measured using a test oscilloscope and a 75 Q Amplitude to 50 Q matching pad The test oscilloscope setup is identical to that used to test the DSP module 601 output amplitude 1 Connect the decoder 601 Out connector through a 75 2 coaxial cable and the 75 Q to 50 Q matching adapter to the CH1 input of the test oscilloscope See Figure 4 16 for the PQA300 rear panel connections 2 Use the BNC to BNC coaxial cable to connect the encoder Composite Out BNC connector to the decoder Composite loop through input 3 Terminate the decoder Composite loop through connector using a 75 Q BNC termination 4 Setthe test oscilloscope for the settings given in Table 4 5 The parameters shown are for the example test oscilloscope given in the test equipment list If you use an equivalent oscilloscope of a type other than the example refer to the operating ma
105. e operations menu Generator video sequences are about 102 Mbytes each and reference video sequences are about 42 Mbytes each Click Next to begin installing the files A list of all the files you have selected for installation is displayed If those selections are not what you want go back to step 8 to correct the selection list If the list is correct click on the Continue soft key to install the files The generator and reference files you selected are automatically stored in the correct folders in the PQA300 directory generator and reference respectively PQA300 Picture Quality Analysis System Service Manual LSS ee eee Appendix B PQA300 Directories and Files The application software for the PQA300 consists of a number of directories and files Note that nine directories are installed on the system drive d and the application files are loaded into these directories The path is provided for each directory and file Path D PQA300 bin lt Dir gt capture lt Dir gt encdec lt Dir gt function lt Dir gt generate lt Dir gt log lt Dir gt precompute lt Dir gt preference lt Dir gt reference lt Dir gt results lt Dir gt temp lt Dir gt Path D PQA300 bin drivers lt Dir gt fonts lt Dir gt support gt Dir gt Mfc42 dll An executable file extension mfc42 dll An executable file extension msvert dll An executable file extension mfco42d dll An executable file extension msv
106. e soft key to start generating the test sequence Click on the Capture soft key to start the capture operation Wait for the test sequence to be captured The message Capture sequence saved with the name format and file extension is displayed when the capture is done Click on the Measure soft key to start the measurement The progress indicator and the messages in the status bar at the bottom of the POA300 display shows you what is happening When all the measurements have completed the Summary results are displayed Check the Summary results for the correct measurement values for the captured impaired video test sequence compared to the typical values given either in Table 4 8 or in Table 4 9 as appropriate Note that the NTSC and NTSC No Setup sequences are given as the same number There are some minor differences between the two sequence types but no more than the expected tolerance for either type The POR and PSNR values you measure can be different than the typical values given in the tables but they should be about the same If the POR and PSNR values are correct the measure algorithms are verified PQA300 Picture Quality Analysis System Service Manual 4 29 Performance Verification S Video Verification 4 30 14 If there is a significant difference between the PQR Luma value or the PSNR Luma values for an impaired sequence and the values given in the table for that sequence check your setup again and redo t
107. echnicians are appraised of the latest information on improvements to the product as well as the latest product options Tektronix warrants this product for one year from the date of purchase The warranty appears after the title page and copyright page in this manual Tektronix technicians provide warranty service at most Tektronix service locations worldwide Your Tektronix product catalog lists all service locations worldwide Tektronix offers single per incident and annual maintenance agreements that provide Depot Service repair of this product Of these services the annual maintenance agreement offers a particularly cost effective approach to service for many owners of the PQA300 Picture Quality Analysis System Such agreements can be purchased to span several years Tektronix supports repair to the module level by offering a Module Exchange program Module Exchange This service reduces down time for repair by allowing you to exchange most modules for remanufactured ones Tektronix ships you an updated and tested exchange module from the Beaverton Oregon service center Each module comes with a 90 day service warranty For More Information Contact your local Tektronix service center or sales engineer for more information on any of the repair or adjustment services previously described PQA300 Picture Quality Analysis System Service Manual Introduction Contacting Tektronix Phone Address Web site Sales suppor
108. ector when you use the serial black output signal of the encoder for genlock 601 ChB In NC Addresses Data Encoder Serial Data Receiver S Video Out to DUT R Composite Out to DUT Genlock NC Serial Black Data Serial Black Out NC Addresses Figure 3 5 Composite generator free run mode PQA300 Picture Quality Analysis System Service Manual 3 7 Theory of Operation DSP System Operation 3 8 Composite Analyzer Configuration The composite analyzer consists of the analysis DSP and the composite decoder A connection diagram is shown in Figure 3 6 Either composite video or S Video input signal is accepted not both at the same time You must connect the composite out loop through signal to an external 75 Q system or terminate it with a 75 Q termination Capture Analysis DSP Addresses Data Decoder User S Video In Addresses Data User Composite In gt Composite Out Serializer 601 Out SMB Figure 3 6 Composite analyzer block diagram The DSP card processes video data using two on board DSP processors The board has a PCI interface two serial digital video input interfaces with active loop through outputs and a serial digital video output interface The PCI interface is for control video data and DSP program code download The serial digital video interfaces are for real time capture and playback of
109. ed and named configuration settings PQA300 Picture Quality Analysis System Service Manual Appendix B PQA200 Directories and Files Recalling these configuration files and saving others is controlled in the Preference configuration menu Path D POQA300 reference Location of all the stored reference ref video sequences These files are the Tektronix provided reference sequences loaded to the hard drive from CD ROM or from a another networked source They may also be test sequences captured as a reference Path D POA300 results Location of all the measurement results files plm jlm jcm New results files are saved for each measurement done on a captured video test sequence The results files for a designated measurement or set of measure ments call be recalled for display using the Results Configuration menu selections Path D POA300 temp Location of the temporary files generated during the application processes These temporary files are cleared when the process that generates them has completed PQA300 Picture Quality Analysis System Service Manual B 3 Appendix B PQA200 Directories and Files B 4 PQA300 Picture Quality Analysis System Service Manual LSS CNN INIM nes Appendix C Video Test Sequences The video test sequences are provided on CD ROM disk in 601 525 and 601 625 digital video formats There are five disks for the 525 sequences and five disks for the 625 sequences The disk contents and
110. egain disk space delete unused user references alias named test captures and user named sequences Use the Recompute Database selection as part of the disk space clean up after deleting a large number of user files or after adding user files from another PQA300 When the database is recomputed the system updates database files to delete associations that are no longer in use and adds new associations of the user files copied to the PQA300 Save Values to Disk This selection saves the summary and detail results of the current results displays to a text file on the selected disk drive The Save As menu shown in Figure 2 8 is displayed when you select the Save Values to Disk feature You can name the file by clicking in the file name field and editing the default name You can use the Save in choice to select a drive where you want to save the files Click the arrow key in the Save in edit field to display the network selection menu shown in Figure 2 9 In this menu you can select any drive on the network you have access to for saving the results text files The Help in this menu accesses the instrument What s This help for information on the choices in the menu PQA300 Picture Quality Analysis System Service Manual Operating Information Save As Ed Savei C3 PQAgo0 e et fe bin C preference capture C3 reference I generate C3 result log C temp I not working precampute File name results txt Sa
111. embly plate to the mainframe chassis and lift the hard drive assembly out of the main frame Reinstall the Disk Drive Assembly The POA300 has two SCSI drives If replace ment is necessary one is replaced with a programmed hard disk drive the other is replaced with an unprogrammed blank hard disk drive The part numbers for both disk drives programmed and unprogrammed are in the Replaceable Part List section of this manual The programmed disk drive has a sticker with its version number on the outside to identify it from the unprogrammed disk drive The drives have unique jumper settings which are only visible from the underside The jumpers set a unique address for the SCSI devices The jumper configuration is as follows Programmed drive jumper configuration Connector J4 Jumper on row 5 only Connector J6 All jumpers removed Unprogrammed drive jumper configuration Connector J4 Jumpers on rows 4 and 5 Connector J6 All jumpers removed PQA300 Picture Quality Analysis System Service Manual 6 21 Maintenance Use the following procedure to replace the SCSI disk drive assembly 1 Place the mainframe chassis on the work surface so that the bottom side is facing up Insert the disk drive assembly into the chassis compartment and line up the mounting screw holes in the assembly plate with the screw holes in the chassis mainframe Install the six T 15 Torx screws that hold the assembly plate to the main frame chassi
112. enu 7 Click OK to accept the changes and exit the menu 8 Click the Capture soft key to capture of the test video sequence as a reference 9 Wait for the capture and store to finish 10 When the status bar indicates that the captured sequence is stored right click the Capture soft key to re display the Capture Configuration menu PQA300 Picture Quality Analysis System Service Manual 4 27 Performance Verification 4 28 11 In the Reference Sequence field select the alias name of the reference sequence you captured in step 8 NTSC Notch Mobile Ref or PAL Notch Mobile Ref 12 Select to capture as a test 13 Give the test capture an alias name that helps you remember the correct capture and reference to associate it with For example NTSC Notch Mobile Test or PAL Notch Mobile Test 14 Click OK to accept the changes and exit the menu 15 Click the Capture soft key to capture the Mobile sequence as a test 16 After the test sequence has been captured and stored click the Measure soft key to start the measurements This time the picture quality analysis is done with respect to the captured reference The effects of the encoder and decoder modules are eliminated de embedded from the analysis 17 Check the Summary results against the typical values for the unimpaired video test sequence given in Table 4 7 The values you get for the POR and PSNR numbers can be different but should be about the same Table 4 7
113. eously they must be identically timed and synchronized to the same clock The third multiplexer input is a feedback from the serializer that is used for diagnostic testing Serial to Parallel Converter The output of the input multiplexer goes to a reclocking circuit that drives a serial to parallel converter deserializer The serial to parallel converter also does the descrambling The circuit outputs are parallel video and clock Source terminations are used in the lines to the buffer ASIC The clock goes two places to the I O ASIC and to the clock multiplexer No precision clocks needed in the DSP section the I O functions drive the clock source decisions The input locks to the incoming stream provided it meets SMPTE 259M specifications There are no circuit provisions made to lock to very jittery input streams or to attenuate jitter on the active loop through outputs 27 MHz Oscillator An internal 27 MHz oscillator is used when there is no external video signal supplied The 2 1 clock multiplexer is under software control There are multiple clock outputs to allow each DSP in the module to have a dedicated clock line In internal clock mode also referred to as free run mode the program output must meet the SMPTE 259M frequency accuracy and jitter specifications To meet these requirements an accurate crystal oscillator is used as the internal clock source The oscillator is a 27 MHz 1ppm TCXO The oscillator drives the clock multip
114. er board adjustment locations 5 9 Figure 6 1 Right side handle screws 6 5 Figure 6 2 Rear panel feet removal 6 6 Figure 6 3 Circuit board retaining plate 6 8 Figure 6 4 Front panel circuit board cover removal 6 10 Figure 6 5 Blank key pad assembly removal 6 11 Figure 6 6 Flat panel display removal 6 13 Figure 6 7 Key pad assembly removal 6 14 Figure 6 8 Front panel interface circuit board connectors 6 15 Figure 6 9 Chassis screw locations for CD drive 6 16 Figure 6 10 Chassis screw locations for the floppy disk drive 6 17 Figure 6 11 Floppy disk drive and CD audio connector installation 3 45 ee vv vv EI UR US VES EARS Y OR dco 6 19 Figure 6 12 Speaker installation and fan locations 6 20 Figure 6 13 Power supply large and small screws locations 6 23 Figure 6 14 Controller board orientation and screw locations 6 25 Figure 6 15 SCSI ribbon cable connection location 6 27 Figure 6 16 Insert I O board into slot 12 6 28 Figure 6 17 Installing the I O circuit board 6 29 Figure 6 18 I O to controller board top interconnections 6 30 Figure 6 19 I O to controller board bottom interconnections 6 31 Figure 6 20 Top connection to controller board
115. ertd dll An executable file extension pqa300 exe The PQA300 application executable file pqa300ip exe An application initialization executable file pqa300ui cnt The online help contents file pqa300ui exe The PQA300 user interface executable file pqa300ui GID A file generated by the online help system pqa300ui hlp The online help file tekseqs map caprefs map userseqs map startup prf iptools ZIP Mfc42 dll PQA300 Picture Quality Analysis System Service Manual A list of the Tektronix video test sequences recognized A list of the user named captured references The user named references map to the user named test sequences A list of the user named captured test sequences The startup preference file Path D PQA300 bin support An executable file extension B 1 Appendix B PQA200 Directories and Files B 2 mfc42 dll An executable file extension mfc4042 dll An executable file extension mmcodecs exe The encoder and decoder diagnostics executable file msvcrt dll An executable file extension msvertd dll An executable file extension testdsp exe The DSP diagnostics executable file Path D PQA300 capture Location of all the captured cap test video sequences A new capture file is saved to this directory every time a captured file is saved to hard disk Each file will have a time stamp to show the date and time of capture as well as the captured test sequence name and format id Path D POQA300 encdec
116. esponsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment c to repair any damage or malfunction caused by the use of non Tektronix supplies or d to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CU
117. ference 601 Test Sequence Out to DUT or to Encoder 601 Serial In From Decoder 601 Serial In Ch A Out Addresses Data Addresses 601 Out 270 MB s 601 Monitor S Video In Data Encoder Data Encoder Genlock Serial Black Data Addresses PCI Composite In Composite Out 601 Out BNC 601 Out SMB to analyzer DSP Ch B In 601 Serial In from Generator S Video Out to DUT Composite Out to DUT Genlock In Analog Reference Genlock Loop Through Serial Black Out to Generator Ch B In Figure 3 3 PQA300 Picture Quality Analysis System block diagram with encoder decoder option PQA300 Picture Quality Analysis System Service Manual 3 5 Theory of Operation Composite Generator Configurations The composite generator consists of the generator DSP and the composite encoder Option 01 You have several options regarding synchronization of the generator to the encoder Black Burst Lockup Serial Video Lockup with the generator in the free run mode and Serial Video Lockup with the generator synchronized to an external serial digital video reference Black Burst Lockup To use an analog composite signal to the encoder for genlock make the connection between the encoder serial black out connector and the generator DSP Ch B In connector as shown in Figure 3 4 Connect the analog composite signal used as a reference to one of the Genlock loop through BNC connector
118. following procedure to remove the cabinet PQA300 Picture Quality Analysis System Service Manual Maintenance 1 Be sure that you are wearing a static grounding wrist strap 2 Before removing the cabinet shut down the PQA300 and unplug the power cord 3 Disconnect any cables connected to the rear panel connectors of the PQA300 system Note their locations for reinstallation 4 Put the protective front cover on the PQA300 system and set the cabinet upright on the working surface with the rear panel up 5 Remove the two screws from the handle on the left side of the cabinet see Figure 6 1 These screws attach to post mounted on the power supply module Handle mounting screws EL Figure 6 1 Right side handle screws 6 Remove the screws from the four feet on the rear of the mainframe chassis 7 Use either an adjustable wrench or appropriate size open end wrench as a lever to pry the cabinet loose from the chassis Loosen each side alternately until the cabinet is released from the EMI gasketing 8 Slide the cabinet up and off the chassis PQA300 Picture Quality Analysis System Service Manual 6 5 Maintenance 6 6 A Replacing the PQA300 Cabinet Rear feet screws
119. g and Replacing The floppy disk drive and the CD drive are assembled in the same unit but can the Floppy Disk Drive be separately replaced 1 2 Remove the four cross tip screw holding the floppy disk drive to the assembly Lift the floppy disk drive up off the chassis as shown in Figure 6 10 Figure 6 10 Chassis screw locations for the floppy disk drive Replace the Floppy Disk Drive 1 Place the replacement floppy drive onto the chassis CD drive as shown in Figure 6 10 Attach the floppy drive to the chassis with three crosstip screws Torque each screw to 2 in lbs PQA300 Picture Quality Analysis System Service Manual 6 17 Maintenance Reinstalling the CD and Floppy Disk Drive Assembly When the CD and Floppy drive assembly is assembled it can be reinstalled into the chassis 1 2 Align the assembly with the slot in the chassis Slide the assembly part way into the compartment and install the CD cable Connect the CD drive cable to the CD drive connector adapter board Attach the audio cable to the CD drive four pin connector a Align the audio cable white colored dot with pin 1 of the CD drive four pin connector b Plug the audio cable onto the CD drive connector see Figure 6 11 Attach the floppy drive cable to the floppy drive connector a Lift up the floppy drive connector locking latch b With the contacts of the short end of the floppy drive cable facing towards the floppy
120. ge Option number Tektronix part number North America Standard 161 0216 00 125 V 15 A Europe A1 161 0066 09 230 V 16 A United Kingdom A2 161 0066 10 230 V 15 A Australia A3 161 0066 11 230 V 10 A Switzerland A5 161 0154 00 230 V 10 A China AC 161 0304 00 240 V 10 A PQA300 Picture Quality Analysis System Service Manual 7 1 Options Option 01 Composite Video Option LC Display 7 2 The composite video option adds an encoder module for use in generating NTSC or PAL composite video and S Video PQA200 test video sequences The encoder module accepts 601 digital video from the generator DSP and performs the encoding to composite video A decoder module is used with the analyzer DSP to capture NTSC and PAL composite video or S Video Composite video signals are converted to 601 digital video for application to the analyzer DSP for processing The Option LC provides an integrated display touch screen U S keyboard keypad and three button mouse PQA300 Picture Quality Analysis System Service Manual Replaceable Parts aS a a Replaceable Parts This section contains a list of the replaceable modules Use this list to identify and order replacement parts Parts Ordering Information Module Servicing Replacement parts are available through your local Tektronix field office or representative Changes to Tektronix products are sometimes made to accommodate improved components as they become availabl
121. gured from the Boot ROM PQA300 Picture Quality Analysis System Service Manual Theory of Operation Composite Encoder Serial Receiver Encoder Genlock The composite generator is formed by a DSP and an optional composite video encoder module The encoder block diagram is shown in Figure 3 10 As are the other modules the encoder is a plug in circuit board that communicates with the server and the generator DSP through the PCI bus The NTSC PAL Encoder module accepts 601 video at 270 MHz and converts it to NTSC with or without setup or PAL The outputs are composite video and S Video The following are requirements of the encoder module for the generator m The mode is set by filling the appropriate registers on the encoder board through the PCI bus interface m The module requires standard Rec 601 input serial digital signals m The module is genlocked either through the passive analog loop through input or by the recovered clock from the serial digital video input The serial digital input signal from the generator DSP is applied to a serial receiver for cable compensation From the receiver the serial digital signal is applied to a serial to parallel converter The recovered parallel 10 bit video data is clocked into a FIFO circuit From the FIFO circuit the data is clocked out with a 27 MHz clock that is locked either to the analog black burst input or the recovered clock from the serial digital signal input The p
122. hange soft key If you want to store all the sub components go to step 10 8 The window displayed when Change is selected permits you to clear any of the sub components of a test sequence you do not want to install Click in the check box to deselect any part of the test sequence Note that if you deselect them all the main test sequence selection also becomes deselected 9 Click on the Continue soft key to continue the installation after you have completed the sub component selections PQA300 Picture Quality Analysis System Service Manual A 7 Appendix A Software Repair select Sub components 10 11 Select the components you want to install clear the components you da not want ta install Sub components Generator Header Only TEE TE 102523 K 41014 K 41014 K y Generator Header Plus w Reference Header Only w Reference Header Plus Description Install generator header only sequence Space Required 287075 K Space Available OK Continue The amount of disk space needed to store the selected test sequence components is displayed along with the amount of space available If there is not enough disk storage space available you will get a message to that effect with a suggestion to either make more disk space or modify your selection to reduce the storage space required You can delete unneeded generator and reference sequences using the Windows NT file manager or the PQA300 fil
123. hannel A Out loop through check er o In the test oscilloscope Trigger menu set the polarity to negative After the measurement stabilizes record the CH 1 Low amplitude of the digital signal waveform The low value should also be approximately 400 mV Add the absolute values of the high and the low amplitudes of the waveform Check that the sum of the high and low amplitude measurements is within the range of 738 mV to 862 mV Move the right most cursor to a position just after the falling edge as shown in Figure 4 6 The falling edge will be between the two cursors Verify that the Fall measurement is 1 2 ns or less Change the TDS784 Trigger Polarity to Negative The display will look approximately as shown in Figure 4 7 Verify for that the Rise measurement is 1 2 ns or less PQA300 Picture Quality Analysis System Service Manual 4 17 Performance Verification Check Generator Check the generator output for the correct serial digital format at 270 MB s and 601 Output for the correct output level 1 Un de ES Analyzer Generator module module 9 99 9 Connect the generator module 601 Out connector to the serial digital input of the external video monitor as shown in Figure 4 9 Check that the video display on the external video monitor is correct Click on the Generate soft key to stop generating the video test signal Verify that the external video monitor display is fr
124. he DSP module The JND and or PSNR differencing algorithms compare the captured video test sequence with the previously stored matching reference test sequence obtained from the server hard disk drive The field by field differences between the two sequences artifacts of the processing by the system under test are determined For many applications the inputs are analog composite video signals In that case the generator DSP output is fed to an encoder that converts the Rec 601 serial digital signal to composite video either NTSC or PAL as selected by the user The analog signal is then injected into the system under test The resulting output from the system under test is then fed to a composite decoder to be converted back to a serial digital signal for application to the analyzer DSP The composite encoder and decoder may be user provided equipment or the modules provided with the Option 01 Composite Video option of the PQA300 system PQA300 Picture Quality Analysis System Service Manual Theory of Operation 1 44 MB Disk Drive CD ROM Drive Ethernet Evo Mouse Sequence 9 GB Hard drive PCI Bus Test Server CPU SVGA Display Monitor Lames 1 Sequence Generator Addresses Data Ch B In Ch B Out ChA In Ch A Out ChB In Ch B Out ChA In Serial Black from Composite Encoder System Serial Re
125. he arrow to display the Network Drive Selection screen 7S Ss v F PQA200 capture Ii D PQA200 capture i MkDir Rename Le feris BD1 525 15370303 031323 cap ferris 601 525 1997 0906 067 626 cap flower 601 25 19970903 031323 cap flower 601 525 19970906 061626 cap Delete Help 1 Files Selected O Files Selected 42011 KBytes Selected OK Bytes Selected Read Only Figure 2 6 File Operations menu under the Other soft key Select Network Drive Access the Select Network Drive dialog screen shown in Figure 2 7 by clicking on the selection arrow next to the directory label field shown in Figure 2 6 The choices include the hard disk drive the floppy disk drive the CD drive and any available network drives Select both the source directory and target directory for file transfers as appropriate Files can be transferred in either direction between currently selected drives PQA300 Picture Quality Analysis System Service Manual 2 13 Operating Information Select Network Drive x H L M N D Fs Q R T U W xX Cancel Figure 2 7 Select Network Drive menu Recompute Database As user references alias named test sequences and user sequence files are captured the information about the names assigned to the files and the references that are associated with the files is stored in text files in the PQA200 bin directory To r
126. he measurements are made When the measurements have completed the Summary results are displayed 9 Check the Summary results against the typical values given for the unim paired video test sequence in Table 4 6 The values you get for the POR and PSNR numbers can be different but should be about the same Table 4 6 Summary PQR for unimpaired sequence using a 601 digital reference 4 26 sequence Test NTSC and NTSC no setup PAL PQR Luma 5 30 8 30 PQR Luma amp Chroma 5 70 8 60 PSNR Luma 27 00 26 00 PQA300 Picture Quality Analysis System Service Manual Performance Verification Composite Sequence Test 1 Right click on the Capture soft key to re display the Capture Configuration Using a De embedded Ref menu 2 Select to capture as a reference Mobile should still be the Reference Sequence selected 3 Give the reference capture an alias name that helps you remember the correct capture and reference to associate it with For example NTSC Notch Mobile Ref or PAL Notch Mobile Ref 4 Click the Decoder soft key to display the menu shown in Figure 4 14 Decoder Configuration x Input Selection Composite CE C S Video Y C E M Help Processing Selection AdaptiveLine Comb AdaptiveField AdaptiveFrame Figure 4 14 Decoder Configuration menu Notch processing selection 5 Select Notch processing 6 Click OK button to accept the changes and go to the Capture Configuration m
127. he screw locations Lift the back plane board assembly out of the chassis Reinstall the Backplane Use the following procedure to reinstall the backplane circuit board into the mainframe card bay 1 6 36 Place the backplane board assembly into the mainframe chassis See Figure 6 25 for orientation of back plane to chassis Attach backplane board assembly to the chassis with fifteen T15 screws Torque the screws to 8 in lbs Connect the RS232 cable connector to the backplane circuit board Reinstall the PCI plug in modules using their reinstallation instructions refer to Reinstalling a Plug In Module on page 6 9 and Controller I O Board Removal and Replacement on page 6 26 Reinstall the power supply assembly using its reinstallation instructions refer to Power Supply Removal and Replacement on page 6 22 Reinstall the circuit board retaining plate Reinstall the cabinet and front bezel to complete the assembly refer to Replacing the PQA300Cabinet on page 6 6 and Replacing the Bezel Trim Ring on page 6 7 PQA300 Picture Quality Analysis System Service Manual Maintenance Ld me S WwW A N Power supply connectors Figure 6 25 Backplane orientation and screw locations CPU Jumper Settings Jumper positions set the CPU clock speed enable or d
128. he test If the problem persists refer the PQA300 system to a qualified service person Table 4 8 Mobile NTSC and NTSC No Setup impaired video test sequence results for composite video Mobile at 3 MB s PQR Luma 9 00 PQR Luma amp Chroma 9 50 PSNR Luma Mobile at 6 MB s PQR Luma 7 00 PQR Luma amp PQR Luma amp Chroma 7 5 Chroma 6 75 23 00 PSNR Luma 25 00 PSNR Luma 25 70 Mobile at 9 MB s PQR Luma 6 30 Table 4 9 Mobile PAL impaired video test sequence results for composite video Mobile at 3 MB s Mobile at 6 MB s Mobile at 9 MB s PQR Luma amp PQR Luma amp 9 50 PQR Luma amp 9 00 Chroma 10 80 Chroma Chroma PSNR Luma 25 00 15 If you want additional verification of the measure algorithm you can repeat the impaired video sequence test using another of the impaired video test sequences You can check the S Video functionality if you have an S Video interconnection cable The following procedure assumes that the composite video testing for Option 01 passed and that the configuration settings are as made for those tests Make the following changes to test the S Video operation 1 Connect the encoder S Video out connector to the decoder S Video input connector In the Capture Configuration menu click on the Decoder button to display the Decoder Configuration menu shown in Figure 4 15 Select S Video as the input selection and Simple as the processing selection Simple is the
129. igure 6 13 Power supply large and small screws locations 4 Disconnect the backplane ribbon cable from the power supply module connector 5 Release the connector latches on the wide ribbon cable housing and disconnect the front panel ribbon cable from the front of the power supply module 6 Disconnect the SCSI hard disk drive power cable from the front of the power supply module 7 Slide the power supply module out of the chassis Use a flat blade screw driver as a lever if needed to disconnect the power supply connectors from the backplane connectors PQA300 Picture Quality Analysis System Service Manual 6 23 Maintenance A Controller Board Removal and Replacement 6 24 Reinstall the Power Supply Use the following steps to reinstall the power supply module 1 Align the power supply connectors with backplane connectors as shown in Figure 6 13 2 Press the power supply module onto the backplane connectors main chassis 3 Attach the power supply module to the chassis with five short and two long T15 screws Torque the screws to 8 in lbs a At the front of the power supply module attach the power supply to the chassis with one short T15 screw b Attach the top of the power supply to the chassis with two short T15 screws NOTE The long T15 screws are used for attaching the power supply to the chassis at either side of the line filter opening c At the rear of the power supply attach the power su
130. in is disabled as described in the preceding note use the key sequence CTRL ALT Delete to display the login dialog box There are three possible logins m You can log in as Administrator and use PQA300 as the password This user can load software change passwords assign users and make the Windows NT system setups for the network m You can log in as PQA300 without entering any password Use this login for normal use of the system for testing picture quality m You can log in as Guest without entering any password A guest has only limited access to files and applications The following procedure loads the impaired video test sequences that are used for testing the system 1 Place the impaired video test sequence CD ROM in the CD drive As soon as the CD is recognized an Install Wizard is initiated to assist you in loading the test sequences Refer to Installing the Generator and Reference Sequences on page A 5 for the procedure for installing files from the CD ROM disc 2 Load the three impaired video test sequences Mobile 601 525 or Mobile 601 625 as needed for your system from the Impaired Video Test Sequence CD ROM to the hard disk drive NOTE To make the verification procedure shorter load only the reference and generate video sequences of the format that you expect to use most 601 625 or 601 525 The following procedure uses the Mobile3mbs impaired video test sequence to run the first impaired video measuremen
131. in the bottom of the inner box Position the side of the pad with the smaller square holes against the side of the box as shown in Figure 6 27 2 Remove the optional accessory pouch if installed and place the protective front cover on the front of the POA300 3 Place the POA300 in the protective bag The bag prevents dust moisture or other small packaging debris from entering the cabinet 4 Fold the top of the bag neatly over the top of the PQA300 to make it as flat as possible and seal with packing tape 5 Place the bagged PQA300 in the inner shipping box The small feet on the bottom of the cabinet go in the square holes in the spacing pad and the larger feet near the front of the POA300 go in the larger rectangular holes The bezel end of the cabinet fits over the edge of the spacer pad PQA300 Picture Quality Analysis System Service Manual 6 41 Maintenance D lt gt D Bottom spacer pad 1 2 of 004 4925 00 Outside edge of box gt Spacer pad positioned inside the bottom of the box Figure 6 27 Placement of bottom spacer pad in inner shipping box 6 Place the other spacer pad on top of the POA300 Again place the side with the small square holes against the side of the box The protective front cover on the bezel of the PQA300 is not covered by the top spacer pad 7 Close and tape the inner shipping box 8 Place one of the support inserts
132. in the bottom of the outer shipping box film side up as shown in Figure 6 28 9 Place the sealed inner shipping box in the center of the bottom support insert in the outer shipping box 10 Put the second support insert over the inner shipping box film side down 6 42 PQA300 Picture Quality Analysis System Service Manual Maintenance NOTE If you are using new packing material purchased from Tektronix pre stretch the film in the support inserts by pushing down firmly several times on the top support insert 11 Place the top tray in the box If you are not shipping accessories with the PQA300 system close and tape the outer shipping box 12 When shipping the accessories place the two accessory trays in the top tray arrange the accessories in the trays and then close and tape the outer shipping box 13 Attach the appropriate shipping documents needed to ship the PQA300 system to its destination either to Tektronix for repair or to another location Note The keyboard mouse and manual boxes do not need to be returned with the PQA300 for servicing Figure 6 28 Repackaging PQA300 Picture Quality Analysis System Service Manual 6 43 Maintenance 6 44 PQA300 Picture Quality Analysis System Service Manual ey DIN Options The power cord options shown in Table 7 1 are available for the PQA300 Picture Quality Analysis System Table 7 1 Power Cord Options Plug configuration Nominal usa
133. ing Pollution Degree Definition Standards or description 5 C to 40 C 2000 meters Test and measuring Class 1 as defined in IEC 61010 1 Annex H grounded product Overvoltage Category II as defined in IEC 61010 1 Annex J Pollution Degree 2 as defined in IEC 61010 1 Note Rated for indoor use only 100 VAC to 240 VAC 50 60 Hz single phase Mains fuse is 8A 250 V Fast Not operator replaceable Refer servicing to qualified service personnel 6 0 Amps maximum 80 for temperatures up to 31 C decreasing linearly to 50 at 40 C A measure of the contaminates that could occur in the environment around and within a product Typically the internal environment inside a product is considered to be the same as the external Products should be used only in the environment for which they are rated Pollution Degree 1 No pollution or only dry nonconductive pollution occurs Products in this category are generally encapsulated hermetically sealed or located in clean rooms Pollution Degree 2 Normally only dry nonconductive pollution occurs Occasionally a temporary conductivity that is caused by condensation must be expected This location is a typical office home environment Temporary condensation occurs only when the product is out of service Pollution Degree 3 Conductive pollution or dry nonconductive pollution that becomes conductive due to condensation These are sheltered locations where neither temperatur
134. ing a De embedded Ref Composite Impaired Sequence Test S Vid o Verification cues rne dene eet Rx nd a Re Bla as ace Format Verification ss min eese ce santa ap ERA m ste Da aux Decoder 601 Out Amplitude Check Encoder Output Amplitude Accuracy Check Encoder Serial Black Out Genlock Check the DSP 27 MHz Clock Frequency Test Equipment Setup Adjustment Procedures Equipment Required use ses sue ele ree rentre ree edes DSP 27 MHz Oscillator Frequency Adjustment Test Equipment Setup isses esse ele ssi ret e hy ere ree Sel eas Encoder Auto Cal 2 3 tes de aad tek Seat Weta te nn Re Check the Encoder Reference Voltage Run the Encoder Auto Calibration Routine Decoder Board Adjustments Adjust Luma Gain setis ree tre mr eme ee re ee aie e Adjust Chroma Gain Run the Decoder Diagnostic Maintenance Preparation obe Maia Sowa Rh mate adu eee Red d Handling Static Sensitive Components Cleaning and Inspection Removal and Replacement Instructions
135. ired video test sequence results for composite video lee hh hn Table 4 10 Summary picture quality values for unimpaired sequence against 601 serial digital reference 1 5 1 6 1 7 1 9 1 10 1 11 1 12 1 12 1 13 1 14 1 15 2 2 2 3 2 3 2 4 2 4 2 9 4 2 4 5 4 9 4 10 4 12 4 26 4 28 4 30 4 30 4 31 viii PQA300 Picture Quality Analysis System Service Manual Table of Contents Table 4 11 Summary picture quality values for unimpaired sequence against captured S Video reference using Simple processing 4 32 Table 4 12 Mobile NTSC and NTSC No Setup impaired video test sequence results for S Video 4 32 Table 4 13 Mobile PAL impaired video test sequence results for D VIA D 53 5 129 4 Fe eus eee der uen Ree a Ce LE 4 32 Table 4 14 Frequency counter setup 4 43 Table 5 1 Required equipment list 5 1 Table 5 2 Frequency counter setup 5 2 Table 6 1 Static susceptibility 6 1 Table 6 2 CPU Speed settings 6 37 Table 6 3 Flat panel jumper settings 6 38 Table 6 4 Packaging material 6 39 Table 7 1 Power cord options 7 1 Table C 1 Video test sequences for 601 525 format C 1 Table C 2 Video test sequen
136. isable CPU features or make operational settings for the CPU The following tables show the jumper settings Figure 6 26 shows the jumper locations on the CPU board with the jumpers in their factory settings CPU and Bus Speed Settings The CPU speed setting is 266 MHz with a bus speed of 66 MHz PQA300 Picture Quality Analysis System Service Manual 6 37 Maintenance Table 6 2 CPU Speed settings CPU Speed Bus E1 E2 E3 E4 233 MHz 66 MHz OFF OFF ON ON 266 MHz 66 MHz ON ON OFF ON 300 MHz 66 MHz OFF ON OFF ON 333 MHz 66 MHz ON OFF OFF ON 350 MHz 100 MHz OFF OFF ON ON 400 MHz 100 MHz ON ON OFF ON 450 MHz 100 MHz OFF ON OFF ON VGA Display Settings The VGA display jumpers on the CPU board are set for the default LCD flat panel display provided with Option LC This is an 800 X 600 LCD display only To use a 1024 X 768 TFT flat panel display you need to change the jumper at E10 to short If you attempt to use a DSTN flat panel at 1024 X 768 the four jumpers at E10 E11 E12 and E13 must all be on or in the short position Table 6 3 Flat panel jumper settings VGA Display E10 E11 E12 E13 640 X 480 TFT Sharp OFF ON OFF ON 800 X 600 TFT OFF OFF OFF ON 1024 X 768 TFT ON OFF OFF ON 1280 X 1020 TFT OFF ON ON ON 640 X 480 DSTN ON OFF ON ON 800 X 600 DSTN OFF OFF ON ON 1024 X 768 DSTN ON ON ON ON Default setting for the PQA3FLC flat panel display 6 38 PQA300 Pictu
137. ixed industrial location CAT II Local level mains wall sockets Equipment at this level includes appliances portable tools and similar products Equipment is usually cord connected CATI Secondary signal level or battery operated circuits of electronic equipment This product contains a CD ROM drive which utilizes a Class 1 laser and complies with EN60825 1 94 as well as with the U S FDA regulations The drive is marked with the laser s classification and the date of manufacture as well as the following information Complies with the DHHS rules 21 CFR Chapter 1 Subchapter J applicable at the date of manufacture PQA300 Picture Quality Analysis System Service Manual Di Operating Information SSS SS Operating Information Installation A Software Installation Hardware Installation A This section provides installation instructions and gives a brief overview of how to operate the PQA300 Picture Quality Analysis System CAUTION To avoid damage to the PQA300 system during shipping retain the original shipping carton Shipping the PQA300 system in any other packaging may void the warranty All software is installed at the factory If you need to reinstall it refer to Appendix C Software Installation The standard instrument is shipped with a rackmount kit For proper cooling allow at least 2 inches 5 1 cm of clearance on the rear and sides of the mainframe Use the instructions provided with the ra
138. ler board have to be connected in sequence that permits all the cables to be attached Use the following step to make the cable connections 1 Plug the ribbon cable from J290 of the I O board to the center 10 pin connector on the controller board as shown in Figure 6 18 2 Plug the ribbon cable from J271 of the I O board to the top 34 pin connector of the controller board PQA300 Picture Quality Analysis System Service Manual 6 29 Maintenance LIEN TRES pg zz us 1 0 J260 cable plugs onto IO J271 Cable plugs onto fF top 40 pin connector top 34 pin connector Figure 6 18 1 0 to controller board top interconnections 3 Plug the ribbon cable from J260 of the I O board to the top 40 pin connector of the controller board 4 Plug the ribbon cable from J190 of the I O board to the bottom 10 pin connector as shown in Figure 6 19 5 Plug the ribbon cable from J170 of the I O board to the bottom 26 pin connector 6 Plug the SCSI ribbon cable to the controller board bottom connector 7 Ifthe local display option is installed connect the flat ribbon cable from J4 on the controller board to the LCD IN connector on the I O board 6 30 PQA300 Picture Quality Analysis System Service Manual Maintenance Brown wire connects to pin 1 Brown Red wire harness plugs onto J240 2 pin connector Figure 6 20 Top connection to controller board PQA300 Picture Quality Analysis System Service Manual 6 31 Maintenance
139. lexer as one of the two possible inputs The output of the clock multiplexer drives a clock buffer Decoder Valid Status bits from the reclocking circuit and the serial to parallel converter are combined to derive the main decoder valid signal MAIN DECVAL This signal is checked by the software before attempting to use the clock or video from the channel A input If the system is deriving the clock from this input and MAINDECVAL goes low the clock multiplexer automatically reverts to the internal clock source Output The output serializer drives a connected cable directly One output of the serializer is fed back to the input multiplexer to for use in a loop back self test PQA300 Picture Quality Analysis System Service Manual Theory of Operation DSP Block Description The DSP devices are two TMS320C80 microcircuits with five processors each These processors share 128 MB of fast SDRAM The analyzer DSP accepts serial digital component video inputs that adhere to TU Recommendation 601 coding formats The DSP does the signal matching and normalization of the captured video sequence prior to making the POR calculations relative to stored references PSNR picture difference calculations are done by the server CPU after normalization by the DSP A simplified block diagram of the DSP portion of the module is shown in Figure 3 8 D 63 0 128 MB Master SDRAM ial A 31 0 DSP Video Data 63 0 Bidirectional D 63
140. lity Analysis System Service Manual 4 25 Performance Verification 25 Select PQR Luma POR Luma amp Chroma and PSNR Luma in the Picture Quality Measurement box 26 Click the OK button to accept the changes and exit the menu Composite Sequence Test 1 Using a 601 Ref Click the Generate soft key to start generating the Mobile test sequence Right click the Playback soft key to display the Playback Configuration menu 3 Select Live as the choice to play back Select the video format you have selected to capture in the Capture Configuration menu 4 Click OK to accept the changes and exit the menu 5 Click the Playback soft key to start the playback The display is black until the generator starts the test sequence 6 Click on the Capture soft key to start the capture operation 7 Wait for the test sequence to be captured The captured reference name format and file extension are displayed when the capture is done 8 Click the Measure soft key to start the measurement The captured test sequence is compared against the Mobile 601 reference and the encoder and decoder effects are included in the measurements The POR map of each field is displayed as it is being processed The progress indicator and the messages in the status bar show you what is happening and the field number that is being processed After the POR analysis finishes the PSNR measurement starts The PSNR map of each field is also displayed as t
141. m gun p 0e nt ae Re dh ov ove el dis ere Serial Black B tst uentos moe Wehr adore diate PEU E eR NR PCH Interface si seras ti ee edle e eres e e re et rn Performance Verification Test Intetyal sever eben eee UP eee eletto e oe receta 4 1 Pr T QUISIES san nn ewe e b ee e etd e oe rre tees 4 1 Equipment Required olent ehe eere ree es 4 1 Procedure bas rerai t En eEVU qb Cede e ees 4 3 Load the Impaired Test Sequences 4 4 Set Up the PQA300 System for Serial Digital Testing 4 5 Unimpaired Sequence Test 4 7 Impaired Sequence Test 4 8 Check Analyzer DSP 601 Out Signal 4 10 Analyzer 601 Out Amplitude 4 12 Check Analyzer Channel A Out Loop Through Amplitude 4 16 Check Generator 601 Output 4 18 Check Generator Main Loop Through 4 19 Analyzer and Generator Channel B Out Loop Through Connectors 4 20 Option 1 Performance Verification 4 21 PQA300 Picture Quality Analysis System Service Manual Table of Contents Run Encoder and Decoder Diagnostics Set Up the PQA300 System for Composite Video Testing Composite Sequence Test Using a 601 Ref Composite Sequence Test Us
142. mbly 6 15 Removing and Replacing the CDROM Drive 6 16 Removing and Replacing the Floppy Disk Drive 6 17 Reinstalling the CD and Floppy Disk Drive Assembly 6 18 Speaker Removal 4 2 ciendum nr Me dde tite elt eg eed 6 19 Speaker Replacem nt ss aiae s T menda emp We RUN eed een n 6 20 Removing and Replacing the Dual SCSI Hard Disk Drives 6 21 Power Supply Removal and Replacement 6 22 Controller Board Removal and Replacement 6 24 Controller I O Board Removal and Replacement 6 26 Interface Board Removal and Replacement 6 32 Backplane Circuit Board Removal and Replacement 6 36 CPU Jumper Settings a ns Gute vs TR ee nei ew qr sre eee eR 6 37 Repacking for Shipment 6 40 Obtaining Replacement Packaging 6 40 Repackaging Instructions 6 41 Options Option 01 Composite Video 7 1 Option LC Display seco cetera ee er eee e eee etes nee nettes ne 7 2 Replaceable Parts Parts Ordering Information 8 1 Module Servicing sis seis ee BA ee Ra eurent 8 1 Module Exchange 44h ape erra ra teen 8 1 Module Repair and Return 8 1 New Mod
143. minates a playback activity Accesses the menu choices of Video Controls on off View Graph Legend on off View Transcript Working Directory File Operations Update Database Display Settings Hardware Settings and Diagnostics Save Values to Disk Help Minimize and Exit Right mouse button click Displays the Page Setup menu Displays a popup menu showing the results displays that you can select Unavailable choices are grayed out Displays the Preference Configura tion menu Displays the External 601 Display Configuration menu Displays the Result Configuration menu Displays the Playback Configura tion menu Same as a left mouse button click The instrument keyboard is used to enter file names directory locations and various alpha or numeric variables Any parameter field in the configuration menus permitting alpha or numeric entries can be edited using the edit features of the keyboard Use the tab and shift tab keys to select the button choices in the configuration menus Use the enter key to activate a selected button a small outline is shown around the button label when the button is selected The Esc button exits an active configuration menu All the PQA300 displays are in windows In each of the four measurement views summary detail graph video the sequence name the measurement name POR PSNR and the format 601 525 601 625 NTSC NTSC No Setup or PAL D are displayed for the current test sequenc
144. mount kit with instructions Standard North American power cable CD ROM set of 11 compact discs 10 discs containing selected video test sequences for 525 line and 625 line video formats 1 disc containing impaired video test sequences in 525 line and 625 line video formats with known and quantified impairments for testing the functional performance of the PQA300 One low loss 75 2 double shielded coaxial cable length 72 inches with BNC connectors for use in video signal interconnections Part number 071 0909 00 063 3477 00 063 3484 00 016 1691 01 161 0066 00 063 3483 00 012 0159 01 The Option 01 system is shipped with the items listed in Table 2 3 in addition to the items listed in Table 2 2 Table 2 3 Additional standard accessories for Option 01 systems Description Part number One 75 Q adapter coaxial cable length 9 inches with a male BNC 174 3916 00 connector on one end and a female SMB connector on the opposite end for encoder to generator DSP interconnection Two 75 Q coaxial cables length 8 inches with female SMB 174 3915 00 connectors on both ends for encoder to generator DSP and decoder to analyzer DSP interconnections Two 75 Q BNC terminations for use in terminating the passive 011 0102 01 loop through connections of the encoder and decoder modules Two S Video cables length 72 inches with standard S Video 012 1554 00 connectors on both ends for use in S Video signal interconnections
145. move the PQA300 cabinet Refer to Removing the Cabinet on page 6 5 for the procedure 5 Connect a 1 MQ probe to the frequency counter Channel 1 input connector 6 Connect the probe ground lead to chassis ground 7 Carefully touch the probe tip to the oscillator 27 MHz Clk test point of the generator DSP module See Figure 4 25 for the location of the test point PQA300 Picture Quality Analysis System Service Manual 4 43 Performance Verification lt Rear of instrument Clock test point 27 MHz Ck o B N O Figure 4 25 Oscillator test point for frequency check NOTE This oscillator is temperature sensitive Allow the system to warm up for 20 minutes before checking the frequency 8 Check the frequency counter for a reading of 27 MHz 27 Hz 26 999 973 to 27 000 027 Hz 9 Move the counter probe tip to the analyzer DSP oscillator test point 10 Check the frequency counter for a reading of 27 MHz 27 Hz 26 999 973 to 27 000 027 Hz 11 Disconnect the test equipment and reinstall the PQA300 cabinet 4 44 PQA300 Picture Quality Analysis System Service Manual Di Aa Adjustment Procedures ae NE Adjustment Procedures This section provides the recommended field adjustments for the POA300 Picture Quality Analysis System Equipment Required Table 5 1 lists the test equipment needed to perform the adjustment procedure The table identifies examples and provides the minimum
146. mp WA WE Figure 8 4 Cables 8 13 PQA300 Picture Quality Analysis System Service Manual Replaceable Parts Replaceable parts list Fig amp index Tektronix Serialno Serial no number partnumber effective discont d 8 5 1 200 4408 00 2 348 1154 01 3 211 0738 00 4 367 0477 00 5 212 0213 00 6 161 0066 00 7 390 1176 00 8 348 1515 00 071 0909 00 063 3477 00 063 3484 00 016 1691 01 161 0066 00 063 3483 00 012 0159 01 174 3916 00 174 3915 00 011 0102 01 012 1554 00 8 14 Qty Name amp description COVER PROTECTIVE FOOT CABINET SCREW MACHINE 6 32 X 0 625 PNH STL BLK ZI TORX HANDLE CARRYING SCREW MACHINE 8 32 X 0 75 L PNH STL BLACK OXIDE PL TORX CA ASSY PWR 3 18 AWG 250V 10A 98 INCH US CABINET WRAP AROUND W HANDLE AND FEET FOOT CABINET STANDARD ACCESSORIES MANUAL TECH USER PQA300 PICTURE QUALITY ANALYSIS SOFTWARE PKG APPLICATION PICTURE QUALITY ANALYSIS PQA300 SOFTWARE PKG OPERATING SYSTEMS RECOVERY CD PQA300 RACKMOUNT KIT W 075 0372 01 INSTRUCTION SHEET JAMAICA PLATFORM CA ASSY PWR 3 18 AWG 250V 10A 98 INCH STR IEC320 RCPT X NEMA 5 15P US SAFETY CONTROLLED SOFTWARE PKG VIDEO TEST SEQUENCES PQA300 CA ASSY RF COAXIAL LOW LOSS RFD 75 OHM DUAL SHIELD 2 TINNED COPPER 72 L BNC MALE STR BOTH ENDS CRIMP STANDARD ACCESSORIES FOR OPTION 01 CA ASSY RF COAXIAL RFD 1 75 OHM 9 0 L BNC PLUG X SMB JACK OPT
147. n enough to prevent dust and dirt from accumulating Dirt can act as a thermal insulating blanket that prevents effective heat dissipation In addition dust buildup can provide high resistance electrical leakage paths between conductors or components in a humid environment Exterior Cleaning the exterior consists of an occasional wiping of the outside surfaces with a damp soft cloth Do not use commercial cleaners because they could discolor or damage the finish Check all the instrument air vents on a regular schedule to ensure that there is not a dust buildup that could impede the flow of cooling air PQA300 Picture Quality Analysis System Service Manual Maintenance Keyboard The optional keyboard may require occasional cleaning to remove lint or oil buildup Use the following procedure to clean the keyboard 1 Turn off the main power switch 2 Unplug the keyboard from the instrument 3 Clean all lint and loose debris from the keyboard with either clean dry low velocity air or with a clean soft brush 4 Clean the external surfaces with a soft cloth dampened with a solution of mild detergent and water Do not allow solution to run into the keyboard WARNING To avoid any potential of electrical shock disconnect power before removing the instrument side panels Interior Interior cleaning is not recommended but if necessary use low velocity dry air to blow away dust or lint If air alone does not remove all the
148. nce sequence and the captured test sequence are applied to an algorithm that predicts how a human viewer would perceive the changes in the video due to the system under test This process normalizes the two sequences After normalization the two sequences are compared to develop the JND numbers from which the PQR rating is determined For the PSNR comparison the PQA300 system directly determines the differences introduced by the processing system impairments artifacts or degradations These differences are used to calculate the PSNR value The PSNR number is a raw data comparison of the two sequences without regard to how a human viewer might perceive the picture quality The PQA300 Picture Quality Analysis System provides quantitative objective measures of degradation in quality of video sequences as they are transported Compression coding decoding may be employed in such transport How the PQA300 Analyzer is used is depicted in the following diagram System under test F me Decoder Tektronix video Tektronix video test sequence test sequence Test sequence generator Test sequence analyzer Figure 3 1 Test setup for direct measurement of system fidelity PQA300 Picture Quality Analysis System Service Manual 3 1 Theory of Operation To measure impairments a transport system causes special video test signals with calibration striping are used The striping is encoded with the test sequence identification
149. nd results display functions of the DSP modules are verified for the unimpaired video sequences After you have confirmed that the unimpaired video test is correct use the following procedure to test one or more of the impaired video sequence Measuring the impaired test sequence against the stored reference sequence provides a check on the operation of the measurement algorithm with different levels of impairment in the video material 1 In the Generate Configuration menu select one of the impaired video test sequences for example Mobile3mbs 2 Inthe Capture Configuration menu select the correct signal type 601 525 or 601 625 3 Select the Mobile reference sequence This reference matches the name in the header ID for all the Mobile impaired video test sequences 4 Click the Generate soft key to start generating the impaired test sequence 5 Click the Capture soft key to start the capture operation 6 Wait for the test sequence to be captured The message Capture sequence saved with the name format and file extension is displayed when the capture is done Note the time stamp of the sequence just saved for future reference If you have several sequences of the same name only the time stamp distinguishes one from another 7 Click on the Measure soft key to start the measurement The progress indicator and the messages in the status bar show you what is happening As with a capture features that become unavailable
150. ne Harmonic Current Immunity IEC 61000 4 2 Electrostatic Discharge Immunity Performance Criterion B IEC 61000 4 3 Radiated RF Electromagnetic Field Immunity 4 Performance Criterion A IEC 61000 4 4 Electrical Fast Transient Burst Immunity Performance Criterion B IEC 61000 4 5 Power Line Surge Immunity Performance Criterion B IEC 61000 4 6 Conducted RF Immunity Performance Criterion A IEC 61000 4 11 Voltage Dips and Short Interruptions Immunity Performance Criterion B Complies with EMC Framework and demonstrated per Emission standard AS NZS 2064 Industrial Scientific and Medical Equipment Emissions comply with FCC Code of Federal Regulations 47 Part 15 Subpart B Class A Limits Performance Criterion Product continues to operate properly and display remains readable 1 Compliance demonstrated using high quality shielded interface cables Minimum immunity test requirement except where noted Controlled EM environment requirement 1V M 1 14 PQA300 Picture Quality Analysis System Service Manual Specifications Table 1 11 Environmental limits and use classification for safety certification compliance Category Safety Certification Compliance Temperature operating Altitude maximum operating Equipment Type Safety Class Installation Overvoltage Category Pollution Degree Supply Voltage Range Fuse Rating Current Rating Relative Humidity maximum operat
151. nel B Out connector through the 75 Q to 50 2 matching pad to the CHI input of the test oscilloscope Connect the encoder Composite output to a composite video monitor setup to display the video format NTSC NTSC No Setup or PAL you want to use for the test Right click the Generate soft key to display the Generate Configuration menu PQA300 Picture Quality Analysis System Service Manual 4 41 Performance Verification Analyzer Generator Decoder DSP DSP Encoder 601 In Video S lt UJ a e ao e S my To test Serial Composite Composite oscilloscope Black Out Genlock to video monitor To SVGA monitor Figure 4 24 Connections for Serial Black Out and Genlock check 6 Inthe Generate Configuration menu select to generate a video sequence of the correct format for your test NTSC NTSC No Setup or PAL continu ously 7 Click on the Encoder soft key to display the Encoder Configuration menu 8 In the Encoder Configuration menu select Gaussian filtering and Serial Black lockup for the Genlock 9 Click OK to accept the changes and exit to the Generator Configuration menu 10 Click OK again to accept all the changes and exit the Generator Configura tion menu 11 Click the Generator soft key to start outputting the test sequence 12 Check that th
152. nel cable connector 4 Record the S Video C channel minus chroma level indicated on the digital voltmeter The expected value is near 350 mV 5 In the encoder diagnostics window select PAL Chroma High and press GO 6 Record the S Video C channel plus chroma level indicated on the digital voltmeter The expected value is near 350 mV PQA300 Picture Quality Analysis System Service Manual Performance Verification 10 Move the 75 Q feed through termination from the S Video C channel connector back to the Composite Output cable connector Record the composite output plus chroma level indicated on the digital voltmeter The expected value is near 350 mV Compute the composite video net results add composite chroma plus and minus amplitude for the peak to peak value Check that the result is 700 mV 7 mV Compute the S Video net results add S Video chroma plus and minus amplitude for the peak to peak value Check that the result is 700 mV 14 mV Check Encoder Serial This procedure checks the encoder module genlock function and the Serial Black Black Out Genlock Output amplitude 1 Connect a composite reference video source of the format you are testing with burst to the encoder Genlock feed through Terminate the feed through using a 75 Q BNC termination Connect test oscilloscope to the generator DSP Channel B Out SMB connector Using the SMB to BNC 75 Q coaxial adapter cable connect the generator Chan
153. nu Select Notch processing Click the OK button to accept the changes and exit to the Capture Configura tion menu Click OK in the Capture Configuration menu to accept the changes and exit the menu PQA300 Picture Quality Analysis System Service Manual Performance Verification 19 20 21 22 23 24 25 Click the Generate soft key to start generating the test signal The display that results when the setup is completed should look approxi mately as shown in Figure 4 4 From the test oscilloscope record the CH 1 High amplitude of the digital waveform The value is approximately 400 mV In the test oscilloscope Trigger menu set the polarity to negative After the measurement stabilizes record the CH 1 Low amplitude of the digital signal waveform The low value should also be approximately 400 mV Add the absolute values of the high and the low amplitudes of the waveform Check that the sum of the high and low amplitude measurements is within the range of 738 mV to 862 mV The measurement uncertainty due the accuracy of the example test equipment is taken into consideration in this range to verify that the output is within the allowable limits of 800 mV 80 mV If the 601 output peak to peak amplitude is not with the expected limits perform the Decoder Adjustment procedure Refer to Decoder Board Adjustments on page 5 7 Check Encoder Output This check verifies the operation of the Encoder Auto Cal ro
154. nual of that oscilloscope to determine the settings 5 Double click on the POA300 icon to start the application 6 Right click the Generate soft key Analyzer Generator Decoder DSP DSP Encoder 601 In Video To test Composite oscilloscope To SVGA monitor Figure 4 16 Connections for the decoder 601 output check PQA300 Picture Quality Analysis System Service Manual 4 33 Performance Verification 4 34 Select PAL format for the test Select to generate the Mobile sequence Select Continuous Looping Click the Encoder soft key to display the Encoder Configuration menu shown in Figure 4 17 a Select Gaussian filter b Select the Serial Video Lockup genlock choice c Click the OK button to accept the choices and exit back to the Generate Configuration menu Encoder Configuration x Filter Selection Gaussian C Brickwall Cancel Lockup Help Serial video Black Burst Figure 4 17 Encoder Configuration menu 11 12 13 14 15 16 17 18 Click OK in the Generate Configuration menu to accept the changes and exit the menu Right click the Capture soft key to display the Capture Configuration menu Select PAL format for the test Select Mobile as the reference sequence Click the Decoder soft key to display the Decoder Configuration me
155. o Controller board on page 6 29 for the connection sequence The Controller I O board has many interconnection cables to the controller board that must be disconnected for removal After removing the cabinet and circuit board retaining plate use the following procedure to remove the I O circuit board 1 Remove the two T15 screws that hold the controller I O board to mainframe chassis one on top and the other in the rear panel 2 Disconnect the SCSI disk drive ribbon cable from the controller board see Figure 6 15 for location 3 Disconnect the two 10 pin connectors from J290 and J190 on the I O circuit board from the controller board 4 Disconnect the 26 pin connector from J170 on the I O circuit board from the bottom 26 pin connector on the controller board 5 Ifthe local display option is installed disconnect the ribbon cable from the LCD IN connector on the I O board 6 Carefully pull up on the I O board to loosen it from the backplane connec tors 7 When the board is loose from the backplane connectors lift the assembly up to gain access to the remaining interconnection cables PQA300 Picture Quality Analysis System Service Manual Maintenance wine 1 J Si re T d Si m mme Figure 6 15 SCSI ribbon cable connection location 8 Disconnect the CD drive ribbon cable from J250 of the I O circuit board Reinstall the 1 0 Board Use the following steps to insert the I O circuit bo
156. only available selection for PAL video format Click OK to accept the change and exit to the Capture Configuration menu Click OK in the Capture Configuration menu to exit the menu PQA300 Picture Quality Analysis System Service Manual Performance Verification 6 Rerun both composite unimpaired sequence tests 601 ref and de embedded starting on page 4 26 and the composite impaired sequence test starting on page 4 29 You have to recapture a new reference to eliminate de embed the effects of the encoder and decoder The measurement values for the unimpaired S Video tested against the 601 serial digital reference are shown in Table 4 10 The measurement values for the unimpaired S Video tested against a captured S Video reference that de embeds the encoder and decoder effects are shown in Table 4 11 Decoder Configuration x Input Selection Composite EE f Video Y C Help Processing 5 election Adaptivel ine Figure 4 15 Decoder Configuration menu for S Video Table 4 10 Summary picture quality values for unimpaired sequence against 601 serial digital reference Test NTSC and NTSC no setup PAL PQR Luma 2 10 2 20 PQR Luma amp Chroma 2 30 2 40 PSNR Luma 47 60 43 50 The testing results for S Video shown in Table 4 10 are better than the same tests made on the composite video reference S Video has its luminance and chrominance already separated and the encoder and decoder proce
157. onnect the S Video to BNC adapter cable to the S Video connector of the encoder module 4 Move the 75 Q feed through termination from the composite video coaxial cable to the Y channel BNC connector of the S Video to BNC adapter cable Use a BNC female barrel connector to connect the termination to the adapter cable See Figure 4 23 for the setup connections PQA300 Picture Quality Analysis System Service Manual Performance Verification Diagnostics TEST PASS FAIL z F P Regse n fo 100 Luma DAC poH IEEE S88 Chroma DAC Jo IE Num ops j j rt Reference Poo oc 100 Lock Tests tS BILD F RedSwihe m Loop Condition Once NTSC Luma Amp NTSC Chroma Low NTSC Chroma High PAL Blanking PAL Luma Amp PAL Chroma Low P amp L Chroma High Figure 4 22 Encoder diagnostics selection menu 5 Record the S Video Y channel blanking DC level indicated on the digital voltmeter The expected range is 0 V 25 mV 6 Move the 75 Q feed through termination from the S Video Y channel connector to the S Video C channel connector 7 Record the S Video C channel blanking DC level indicated on the digital voltmeter The expected range is 0 V 25 mV 8 Move the 75 Q feed through termination from the S Video C channel connector back to the S Video Y channel connector 9 In the encoder diagnostics window select PAL Luma AMP and press GO 10 Record the S Video Y channel luminance level indi
158. oot ROM performs the following functions m Initializes all hardware devices for example it resets the INO Video ASIC m Initializes the DSP processors m Performs minimal diagnostics Control port read write m Quick Dual Port Read Write m Quick SDRAM Read Write After the reset the DSP processors wait for a signal from the server PCI to start download operation Once the download is complete the DSP vectors to the starting address of the downloaded programming The composite analyzer is formed by a DSP and an optional composite video decoder module that accepts composite video or S Video and converts it to 601 video at 270 MHz The decoder block diagram is shown in Figure 3 9 As are the other modules the decoder is a plug in circuit board that communicates with the server and the analyzer DSP through the PCI bus The decoder module input accepts standard level analog video Input can be composite or S Video The input consist of clamping circuitry buffering and multiplexing switching Composite video input is buffered and goes to the Luma output that is applied to the sync stripper With an S video input signal the separate chroma and luma video information are buffered outputs A calibration signal is applied to the third input to the multiplexer PQA300 Picture Quality Analysis System Service Manual Theory of Operation Chroma 5 Decoder S Video In Composite loop through Calibration Generator 601 O
159. ou have to select which generator sequences and reference you want to install l Place the disk containing the sequences you want to install in the CD drive 2 As with the Application Program disk the CD reads automatically and the Install Wizard displays The first installation window shows the standard warning that you should close any programs you have running and it shows the copyright warning Click on Next to continue the installation procedure LT PQA2Z00 Sequence Setup Cheer Flower Soccer PQA300 Sequence Setup 3 The second window shows the default destination folder where the files you select later are to be saved The default for normal installation of the files is the D drive in the PQA300 directory If that selection is appropriate for your system click on Next to continue the installation and skip to step 5 PQA300 Picture Quality Analysis System Service Manual A 5 Appendix A Software Repair PQA300 Sequence Setup Setup will install the PQA300 sequences in the following application folder To install to this folder click Next To install to a different folder click Browse and select another folder If you choose nat to install any sequences click Cancel ta exit Setup Destination Folder D PQA300 Browse Cancel lt Back 4 Click the Browse soft key to select other destinations for the files including any network drives that are accessible After you make your selec
160. ower on Proper operation with coaxial cable up to 14 5 dB loss at 135 MHz Typical operation to 300 meters with Belden 8281 coaxial cable Meets SMPTE 259M levels and rise and fall times No reclocking is done on loop through output At least 15 dB 1 MHz to 270 MHz with power on Complies with ITU R BT 601 BT 656 and SMPTE 259M Exception output frequency accuracy only specified when not refer enced to an external input signal 75 Q At least 15 dB 1 to 270 MHz with power on Output level 800 mV 80 mV Rise Fall 0 3 ns to 1 2 ns measured 20 to 80 Jitter Internal Reference Less than 0 2 UI typically 0 3 ns peak to peak Jitter External Reference Depends on the reference input Typically peaking at 0 05 dB Jitter attenuation 3 dB point is typically at 650 kHz Frequency 270 Mbit s Frequency accuracy 1 5 ppm over temperature range plus 1 ppm per year drift when using the internal oscillator Output Connector BNC PQA300 Picture Quality Analysis System Service Manual 1 5 Specifications Table 1 2 NTSC PAL Decoder board Characteristic Input Channels Video Format Composite Input type Return loss Loop through insertion loss Input amplitude range Hum range Frequency range Genlock jitter S Video Input type Return loss 60 Out serial digital video Connectors Format Output level Rise Fall Jitter Performance requirement NTS
161. ows the state of the named activity when appropriate Measure Mode During a picture quality measurement the status bar displays the progress of the measurement To the right of the progress indicator you will see the measured value for the field the peak measurement that occurs during the measurement and a field indicator showing the current field being measured The peak value found as all the fields are measured is held when the measure ment is finished The same messages are displayed when a measurement results file is restored for viewing Configuration Errors If you click the left mouse button on any of the PQA300 function soft keys that have associated configuration menus you will get an error message if the configuration is incorrectly set up to produce the action you selected For example if you click on the Results soft key and there are no results selected an error message displays PQA300 Picture Quality Analysis System Service Manual he Theory of Operation Se E Theory of Operation Functional Operation The PQA300 Picture Quality Analysis System is a picture quality measurement instrument that produces repeatable objective measurement of picture quality impairment Measurement results are based on a frame by frame comparison between the original reference video material and the reconstructed video obtained after the digital data has been processed by a variety of methods For POR measurements both the refere
162. ozen Disconnect the video test signal cable from the external digital component video monitor SVGA video 601 Out module To 601 digital To SVGA monitor video monitor or test oscilloscope Figure 4 9 Connection for generator output check 6 Using the 75 Q coaxial cable connect the Generator 601 Out connector 4 18 through the 75 Q to 50 Q matching pad to the CH1 input of the test oscilloscope If the test oscilloscope is not already set up as shown in Table 4 5 make those setups and then go to step 8 PQA300 Picture Quality Analysis System Service Manual Performance Verification Check Generator Channel A Loop Through 9 Analyzer Generator module module 10 11 Click on the Generate soft key to start sending the video test sequence From the test oscilloscope record the CH 1 Low amplitude of the digital waveform The value is approximately 400 mV In the test oscilloscope Trigger menu set the polarity to positive After the measurement stabilizes record the CH 1 High amplitude of the digital signal waveform Check that the sum of the high and low amplitude measurements is within the range of 738 mV to 858 mV Disconnect the Generator 601 Out signal from the matching pad Connect the Analyzer 601 Out connector to the Generator Channel A In connector using a 75 2 coaxial cable See Figure 4
163. pe Pulse Class Width Source CH1 Polarity Positive Trigger When Within Limits High Limit 35 ns Low Limit 14 ns Level OV Mode Normal Holdoff 250 ns 3 The display that results when the setup is completed should look approxi From the test oscilloscope record the CH 1 High amplitude of the digital waveform The value is approximately 400 mV PQA300 Picture Quality Analysis System Service Manual 4 13 Performance Verification Figure 4 4 CH 1 high amplitude 5 In the test oscilloscope Trigger menu set the polarity to negative After the measurement stabilizes record the CH 1 Low amplitude of the digital signal waveform The low value should also be approximately 400 mV Figure 4 5 CH 1 low amplitude 6 Add the absolute values of the high and the low amplitudes of the waveform PQA300 Picture Quality Analysis System Service Manual Performance Verification 7 Check that the sum of the high and low amplitude measurements is within the range of 738 mV to 862 mV The measurement uncertainty due the accuracy of the example test equipment is taken into consideration in this range to verify that the output is within the allowable limits of 800 mV 80 mV 8 Move the right most cursor to a position just after the falling edge as shown in Figure 4 6 The falling edge will be between the two cursors Figure 4 6 CH 1 fall time 9 Verify that the Fall measurement is 1 2 ns or less 10 Change the tes
164. porting functions under the Other soft key 2 11 Figure 2 5 Working directory selection screen 2 12 Figure 2 6 File Operations menu under the Other soft key 2 13 Figure 2 7 Select Network Drive menu 2 14 Figure 2 8 The Save As menu for saving results text files 2 15 Figure 2 9 The network selection menu for choosing the location to store results text files 2 15 Figure 2 10 Display settings controls 2 16 Figure 2 11 Hardware settings menu 2 17 Figure 2 12 Encoder Decoder diagnostics and Encoder PATI Cala seras EET 2 18 Figure 2 13 Help system contents screen 2 19 Figure 2 14 Progress indicator shown across the bottom of the display ie cei aee EO er Ra ORCI dece ce 2 19 Figure 3 1 Test setup for direct measurement of system fidelity ye Sale eas ewe ERREUR ROUTER S068 ee 3 1 Figure 3 2 Functional operation diagram 3 2 Figure 3 3 PQA300 Picture Quality Analysis System block diagram with encoder decoder option 3 5 Figure 3 4 Composite generator with external analog reference 3 6 Figure 3 5 Composite generator free run mode 3 7 Figure 3 6 Composite analyzer block diagram 3 8 Figure 3 7 Digital signal processor module I O section simplified block diagram yo vi LA YA RIA AR
165. pply to the chassis with two short screws and two long T15 screws 4 Plug in the backplane ribbon cable on the side of the power supply 5 Plug the wide ribbon cable onto the power supply module connector on the front of the power supply CAUTION The power supply ribbon cable connector is difficult to fully plug on Make sure both retaining latches are fully closed over the connector housing 6 Plug the SCSI power cable onto the power supply connector located beneath the large ribbon cable connector on the front of the power supply chassis Use the following procedure to remove the controller board 1 Remove the circuit board retaining plate see Figure 6 3 on page 6 8 2 Remove the two T15 screws that hold the controller board to mainframe chassis see Figure 6 14 for the screw locations PQA300 Picture Quality Analysis System Service Manual Maintenance 3 Disconnect the SCSI disk drive ribbon cable from the controller board see Figure 6 19 T15 screws Figure 6 14 Controller board orientation and screw locations 4 Disconnect the two 10 pin connectors from J290 and J190 on the I O circuit board from the controller board 5 Disconnect the 26 pin connector from J170 on the I O circuit board from the bottom 26 pin connector on the controller board 6 Ifthe local display option is installed disconnect the ribbon cable from the J4 connector on the controller board 7
166. q Channel 1 Input impedance 1 MQ Input coupling AC Attenuation OFF Fiter OFF 2 Be sure that you wear a static grounding wrist strap 3 Turn off power to the instrument 4 Remove the PQA300 cabinet and circuit board retainer Refer to the Removing the Cabinet on page 6 5 for the procedure 5 Remove the analyzer DSP module For the removal procedure refer to Removing a Plug In Module on page 6 8 6 Insert the PCI circuit board extender into the analyzer DSP module slot 7 Insert the analyzer DSP module in the PCI extender board connector 8 Turn the power to the instrument back on and wait for the initialization process to complete It is not necessary to log in or start the PQA300 application NOTE This adjustment is temperature sensitive The instrument should be allowed to warm up for 20 minutes before attempting to make the final adjust ment to the limits given in step 12 This centers the operating range of the oscillator so that it will remain in specification with aging and temperature variations 9 Connect a 1 MQ probe to the frequency counter Channel 1 input connector 10 Connect the probe ground lead to chassis ground of the instrument 11 Carefully touch the probe tip to the oscillator 27 MHz Clk test point of the analyzer DSP module See Figure 5 1 for the test point location PQA300 Picture Quality Analysis System Service Manual Adjustment Procedures lt Rear of instrument Clock test point
167. r 3and4 Serial Number 5 Qty 6 Name amp Description 7 Mfr Code 8 Mfr Part Number Abbreviations Mfr Code to Manufacturer Cross Index Manufacturers cross index Mfr code Manufacturer 00779 AMP INC 060D9 UNITREK CORPORATION 06383 PANDUIT CORP 06915 RICHCO 03ZT7 MOBILE PLANET 060D9 UNITREK CORPORATION This section contains a list of the mechanical and or electrical components that are replaceable for the POA300 Picture Quality Analysis System Use this list to identify and order replacement parts The following table describes each column in the parts list Description Items in this section are referenced by figure and index numbers to the exploded view illustrations that follow Use this part number when ordering replacement parts from Tektronix Column three indicates the serial number at which the part was first effective Column four indicates the serial number at which the part was discontinued No entries indicates the part is good for all serial numbers This indicates the quantity of parts used An item name is separated from the description by a colon Because of space limitations an item name may sometimes appear as incomplete Use the U S Federal Catalog handbook H6 1 for further item name identification This indicates the code of the actual manufacturer of the part This indicates the actual manufacturer s or vendor s part number Abbreviations conform to American National Stan
168. racteristic Mainframe Form Factor Processor System Memory Real Time Clock Retention Time Real time clock CMOS setup and PnP NVRAM BIOS Bus Expansion Slots Graphics External VGA connector Optional local display Non volatile Storage Floppy Disk drive CD ROM drive Hard Disk Drives Mainframe Interfaces Supplemental information Tektronix manufactured common platform mainframe Rack mountable in standard 19 inch rack Optional local display mouse and keyboard Two 400 MHz Pentium II processors 256 MB Real time clock calendar with a resolution of 1 second or less Projected battery life is typically 10 years Phoenix BIOS field upgradable 32 bit PCI 8 PCI slots 1024 x 768 SVGA resolution with 32 k colors minimum 800 x 600 resolution with 32 k colors minimum Standard 3 5 inch PC compatible disk drive 1 44 MB high density double sided 2HD PC compatible half height IDE CD ROM drive 8X Standard PC compatible Small Computer Systems Interface SCSI HDD Two drives of 9 1 Gbyte capacity each Captured video sequences and other user files are striped on both hard drives m One loop through ethernet port W One bi directional RS 232 RS 422 RS 485 port m One parallel port printer W Two hot pluggable keyboard ports on the rear panel and the left front side panel m Two hot pluggable mouse ports on the rear panel and the left front side panel Use either connector to connect only one keyboard and only one mouse
169. ration routine compensates the adjustments of the encoder module for temperature changes and aging Run the Encoder Auto Cal procedure using the following steps 1 Allow the PQA300 to completely warm up about 20 minutes before the using the automatic calibration feature This time permits all the circuitry to stabilize and the auto cal adjustments are then optimized for the normal operating temperature 2 Click the Encoder Auto Cal selection 3 After the auto calibration has finished rerun the Encoder Diagnostics to check for pass or fail of the diagnostic tests 4 Ifthe encoder still shows diagnostic failures after the auto calibration refer your PQA300 system to a qualified service person for repairs PQA300 Picture Quality Analysis System Service Manual 4 23 Performance Verification Set Up the PQA300 System for Composite Video Testing The following procedure sets up the PQA300 Picture Quality Analysis System to generate an analog video test sequence capture that same test sequence measure the captured test sequence against the stored reference sequence and display the measurement results The cable connections required to interconnect the DSP modules with the encoder and decoder modules are shown in Figure 4 13 The encoder to generator DSP and decoder to analyzer DSP interconnection cable are standard accessories for Option 01 Analyzer Generator Decoder DSP DSP Encoder 601 In ChB In A 3
170. re 6 24 Connect the disk drive flexible circuit board to the interface board disk drive connector PQA300 Picture Quality Analysis System Service Manual Maintenance connector o Figure 6 24 Cut away view showing wire routing of fan and speaker wires 10 Connect the ribbon cable connector from the controller I O to the interface board controller connector 11 Connect the CD stereo cable 12 Connect the power supply cable 13 Connect the ribbon cable connector from the keypad assembly to the interface board 14 Reinstall the interface circuit board cover assembly PQA300 Picture Quality Analysis System Service Manual 6 35 Maintenance Backplane Circuit To remove the backplane you must first remove the power supply and all of the Board Removal and plug in modules Replacement Remove the Backplane With the cabinet off the chassis use the following procedure to remove the backplane 1 Remove the power supply module see Power Supply Removal and Replacement on page 6 22 Remove all of the plug in modules from the card bay see the PQA300 module removal instructions starting with Removing a Plug in Module on page 6 8 Disconnect the RS232 cable connector from the backplane circuit board Remove the 15 screws holding the backplane board assembly to the chassis with a T15 screw tip screwdriver see Figure 6 25 for t
171. re Quality Analysis System Service Manual Maintenance EE EE HEB seg ai E1 E2 E3 E4 E5 E6 E7 E8 E9 E10 E11 E12 E13 Figure 6 26 CPU Jumper setting locations PQA300 Picture Quality Analysis System Service Manual 6 39 Maintenance Repacking for Shipment Before shipping an instrument to a Tektronix field office for repair attach a tag to the instrument showing the following m Owner s name and address m Serial number m Description of the problem s encountered and or service required The PQA300 Picture Quality Analysis System is shipped in cartons designed to provide it with the maximum protection If you ship the instrument subsequently you will need to use these cartons the spacer pads the protective bag and the instrument support inserts to provide adequate protection NOTE The PQA300 Picture Quality Analysis System shipping carton in good condition must be used to return the instrument to Tektronix service centers We cannot honor the warranties if the PQA300 is not shipped in its original carton or in a replacement carton and its supporting packaging material purchased from Tektronix Contact your Tektronix representative to obtain new packaging Obtaining Replacement Packaging 6 40 New packaging material is available from Tektronix The part numbers are in Table 6 4 and in the Replaceable Mechanical Parts List in the service manual Packaging components are shown in Figure 6 28 Each component ha
172. rrier frequency The Fsc circuit is reset every color frame to correct for any slight frequency errors The Fsc output completes the phase lock loop back to the Chroma subcarrier lock ASIC A programmable gate array device is used to generate the timing detect Color Field and generate the 601 serial black burst The serial black burst signal is applied to the generator DSP to provide a genlock signal to that module The external analog black burst signal has less jitter than the recovered clock from the serial digital input signal If the encoder is locked to the analog black burst input signal the recovered clock from the serial digital video is at the same rate but the two are not phase locked The FIFO circuit accommodates the phase difference The PCI Interface circuitry connects the encoder module to the host processor PQA300 Picture Quality Analysis System Service Manual Performance Verification en aaa Performance Verification Test Interval Prerequisites Equipment Required This section contains procedures for verifying that the instrument performs according to the characteristics stated in the Specifications section If the instrument is not able to pass these tests refer to the Maintenance section for troubleshooting procedures NOTE To complete the procedures in this section you need a basic understanding of the Windows NT operating system and thePQA300 Picture Quality Analysis System application For det
173. s Tighten to 8 inch pounds of torque Connect the power supply cable to both hard disk drives Reroute the SCSI drive ribbon cable and connect the cable connectors to the hard disk drives Dress the ribbon cable flat and clip the SCSI drive cable into the hold down clips on the assembly plate NOTE If you are replacing a hard disk drive follow the instructions provided with the replacement disk drive to restore the software and disk partitioning required for the operating system Power Supply Removal Use the following steps to remove the power supply module and Replacement 6 22 Turn off and disconnect the main power from the PQA300 Remove the measurement set cabinet refer to Removing the Cabinet on page 6 5 for the removal instructions Remove the five short and two long T15 screws that attach the power supply module to the chassis see Figure 6 13 for the screw locations a Atthe front of the power supply module remove one short T15 screw Use a long shafted screwdriver to access the front screw through the hole in the chassis b Atthe top of the power supply remove two short T15 screws c Atthe rear of the power supply remove two short screws and two long T15 screws PQA300 Picture Quality Analysis System Service Manual Maintenance Front panel ribbon cable SCSI hard disk drive power connector F
174. s You must connect the Genlock loop through output to a 75 Q system or terminate it with a 75 Q BNC termination If you choose not to connect a genlock signal to the encoder module the serial black output from the encoder continues but becomes invalid When the serial black out signal is not a valid synchronization signal or if you are not going to use Black Burst lockup you must disconnect the serial black signal from the generator DSP Ch B In connector The configuration is then valid for the Serial Video lockup mode of composite generator operation ChB In Addresses Data Encoder Data S Video Out to DUT A Composite Out to DUT Analog Reference Genlock Loop Through Serial Black Data Addresses Serial Black Out Figure 3 4 Composite generator with external analog reference PQA300 Picture Quality Analysis System Service Manual Theory of Operation Serial Video Lockup When connected as shown in Figure 3 5 the serial digital video signal from the generator is the source of the synchronizing signal to the encoder board You can choose to allow the generator DSP to free run on its internal reference or you can synchronize the generator DSP to a serial video reference The external serial digital is connected to the generator DSP Ch A In BNC connector To avoid a synchronization conflict do not connect a serial digital video signal to the generator DSP Ch A In conn
175. s an index number which also appears in Table 6 4 To obtain these items contact your nearest Tektronix office or representative Table 6 4 Packaging material Item Tektronix part number Index number Accessory tray keyboard 004 4851 00 Accessory tray 004 4852 00 Spacer pad makes two pads for 004 4925 01 inner shipping box Anti static pouch 006 2427 01 Protective bag 006 8164 00 Top tray cardboard insert 004 4912 00 1 Instrument support inserts top and 004 4913 00 2 bottom PQA300 Picture Quality Analysis System Service Manual Maintenance Table 6 4 Packaging material Cont Item Tektronix part number Index number Inner shipping box 004 4926 00 3 Shipping box 004 491 4 00 4 Repackaging Instructions When the PQA300 is shipped it is important to provide it with the maximum protection Figure 6 27 shows how to repackage the PQA300 for shipment As the figure shows it is not necessary to send the accessories with the PQA300 for reshipment to repair If you are shipping to another site for reinstallation pack the accessories last in accessory trays at the top of the box The inner shipping box pads and protective bag provide the necessary protection to allow the shipping materials of the outer shipping box to correctly support the product for shipment Pack the inner shipping box as follows 1 If you have the original packaging material start by placing one of the spacer pads
176. scription CIRCUIT BD ASSY PROCESSOR IO BRACKET PCI PROCESSOR 1 0 BOARD 18 GA CRS CIRCUIT BD ASSY PICMG PCI CONTROLLER BRACKET PCI 18 GA CRS DTI PROCESSOR CONN HARDWARE DSUB JACK SCREW 4 40 X 0 312 L HEX HD STL CD PL W O WASHERS amp NUT CIRCUIT BD ASSY ENCODER PQA300 BRACKET REAR PANEL MOUNT ENCODER CIRCUIT BD ASSY DSP PQA300 SCREW MACHINE 6 32 X 0 25 OPN HST LCDP LT 15 TORX DR BRACKET REAR PANEL MOUNT DSP CIRCUIT BD ASS DECODER PQA300 BRACKET REAR PANEL MOUNT DECODER BRACKET 0 062 AL SIDE MOUNTING 5 0L X 0 750 ETCH CHROMATE SCREW MACHINE 6 32 X 0 188 PNH STL CDPL T 15 TORX DR BRACKET SCSI DRIVE MTG 15 580 X 10 250 0 062AL CHROMATE BRACKET HARD DRIVE CABLE RETAINER 0 050 AL DISK DRIVE WINCHESTER 3 5 INCH 9 GBYTE SCSI 25L1810 DISK DRIVE WINCHESTER 3 5 INCH 9 1 GBYTE SCSI 07N3220 GASKET ELEC CLIP ON 16 X 0 51 BE CU BRIGHT NI PLT SCREW MACHINE 2 6 X 0 45 MM 3 0L PNH STL NICKEL PL PHILLIPS JCIS SCREW MACHINE M2X3MM PHL PNH STL NI PL SCREW MACHINE M2X2MM PHL PNH STL NI PL BRACKET ASSY DRIVE MOUNTING 0 040 AL ALLOY 5052 H32 ETCH CHROMATE DISK DRIVE FLOPPY 3 5INCH 1 44 MB 0 5 IN HIGH BLACK BEZEL DDDS 96 X 126 X 12 7MM FD 05HF563 FOOT 6 5MM W X 43 50MM L 2MM THK RUBBER BLACK INSTRUMENT SUPPORT DISK DRIVE OPTICAL 644MB CD ROM 16 7 MB SEC IDE ATAPI CD 224E 93 CIRCUIT BD ASSY CD ROM INTERFACE 389 2561 00 WIRED
177. serial digital video signals in ITU R BT 601 format Bandwidth DC to 1 GHz 75 Q to 50 Q matching pad Frequency 100 MHz 10 digit resolution accuracy 0 1 ppm referenced to WWV GPS or with a high accuracy time base Low loss video cable double shielded BNC male to BNC male 72 in BNC male to SMB female test equipment interconnection 39 5 in Standard S Video cable 72 in 4 pin DIN connectors on both ends Standard S Video connector to dual BNC male connector for Y and C outputs Termination impedance 75 2 connec tors BNC male to BNC female BNC barrel connector BNC female to BNC female BNC male connector with dual banana jack binding post with center and ground indicated Example Sony video monitor with serial digital interface BVM 14F5U with Option BKM 21D Tektronix TDS784 Oscilloscope Tektronix AMT75 Hewlett Packard Model 53131A Tektronix part number 012 0159 01 Tektronix part number 174 3579 00 Tektronix part number 012 1554 00 Pacific Radio Electronics S4P Y BNC 6 Tektronix part number 011 0051 01 Tektronix part number 103 0028 00 Tektronix part number 103 0035 00 Impaired Video Test Sequence CD Video test sequence with known impairments Tektronix part number 063 3025 00 PQA300 Picture Quality Analysis System Service Manual Performance Verification Procedure Power on the POA300 as follows 1 Connect an SVGA monitor for a displ
178. sis System Service Manual for a description of the configuration menus and the user configuration choices Other Soft Key Choices Press the Other soft key to access some operation supporting functions The choices are shown in Figure 2 4 Refer to the PQA300 Picture Quality Analysis System User Manual for further information on the Other soft key vew aapn legend v View Video Controls View Transcript Window Working Directory File Operations Recompute Database Save Yalues To Disk Hardware Settings amp Diags Display Settings Help About Minimize Exit Figure 2 4 Supporting functions under the Other soft key PQA300 Picture Quality Analysis System Service Manual 2 11 Operating Information 2 12 View Graph Legend The graph legend is available for display only while graph results are displayed Turn the legend on or off using the selection on the Other soft key or with the Legend soft key in the graph display View Video Controls The Video Controls are available during playback operation and when viewing video of either test sequences or maps Turn it off by deselecting the choice in the Other soft key choices View Transcript Window The transcript window lists the application activities that have occurred and are occurring for use as a debugging tool Use the scroll bar to move through the list of events if necessary Working Directory The PQA300 application searches for its files
179. ss it onto the switch shaft PQA300 Picture Quality Analysis System Service Manual 6 7 Maintenance Application Modules The PQA300 plug in modules are located in the mainframe module bay The SCSI hard disk drives are located in the mainframe bottom compartment The following procedures start after removal of the cabinet from the mainframe Removing a 1 Remove the circuit board retaining plate see Figure 6 3 Plug In Module Remove the holding screws from the top and bottom of the plug in module you are going to remove 3 Carefully pull up on the module to loosen it from the backplane module connectors You may have to alternate lifting on the front and the rear of the module to work it loose from the from the connectors and the card bay Circuit board retaining plate Figure 6 3 Circuit board retaining plate 6 8 PQA300 Picture Quality Analysis System Service Manual Maintenance 4 When the module is loose from the connector lift the module out of the module bay 5 Place the removed module on a static free work surface or in a anti static protection bag Reinstalling a Plug In Module Insert the module into the module bay at the correct slot position Carefully align the module edge connector with the backplane connectors Apply firm pressure to completely seat the module in the connectors Replace the module holding screws to hold the module in the card bay Q
180. ssing is less of a factor on the measurement values obtained Notice that the results shown in Table 4 11 obtained using the de embedding technique are similar to the results of the composite video tests shown in Table 4 7 PQA300 Picture Quality Analysis System Service Manual 4 31 Performance Verification Format Verification 4 32 Table 4 11 Summary picture quality values for unimpaired sequence against captured S Video reference using Simple processing Test PQR Luma PQR Luma amp Chroma PSNR Luma 7 Verify the measured results for the unimpaired video sequence and the impaired video sequence against the typical expected results shown in Table 4 12 or Table 4 13 as appropriate for the video format of the test Table 4 12 Mobile NTSC and NTSC No Setup impaired video test sequence results for S Video Mobile at 3 MB s Mobile at 6 MB s Mobile at 9 MB s PQR Luma 8 10 PQR Luma 5 50 PQR Luma 4 40 PQR Luma amp PQR Luma amp 5 80 PQR Luma amp Chroma 8 60 Chroma Chroma 4 70 PSNR Luma 24 00 PSNR Luma 27 20 PSNR Luma 29 40 Table 4 13 Mobile PAL impaired video test sequence results for S Video Mobile at 3 MB s Mobile at 6 MB s Mobile at 9 MB s PQR Luma 8 00 PQR Luma 5 60 PQR Luma 4 50 PQR Luma amp PQR Luma amp 5 90 PQR Luma amp Chroma 8 35 Chroma Chroma 4 90 PSNR Luma 24 90 PSNR Luma 28 30 PSNR Luma 30 50 The functionality is verified using only one format preferably th
181. t Service support Technical support 1 800 833 9200 Tektronix Inc Department or name if known 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA www tektronix com 1 800 833 9200 select option 1 1 800 833 9200 select option 2 Email techsupport tektronix com 1 800 833 9200 select option 3 6 00 a m 5 00 p m Pacific time This phone number is toll free in North America After office hours please leave a voice mail message Outside North America contact a Tektronix sales office or distributor see the Tektronix web site for a list of offices PQA300 Picture Quality Analysis System Service Manual xix Introduction XX PQA300 Picture Quality Analysis System Service Manual he A Specifications Sa CINES ONSE Specifications This section lists the electrical physical and environmental characteristics of the PQA300 Picture Quality Analysis System Product Description The PQA300 analysis system uses Microsoft Windows NT Workstation 4 0 as its operating system see Figure 1 1 The POA300 Picture Quality Analysis System has a standard configuration that can be used to determine the picture quality of 601 serial digital video test sequences The addition of Option 01 the composite video option permits the testing of composite video test sequences User provided PQA300 rear panel SVGA Monitor
182. t If you want to test all the impaired video sequences load them all now PQA300 Picture Quality Analysis System Service Manual Performance Verification Set Up the PQA300 System for Serial Digital Testing Table 4 2 Impaired video test sequences disk Sequence format Sequence title Sample rate 601 525 Mobile3mbs 601 3 Mbits sec 601 525 Mobile6mbs 601 6 Mbits sec 601 525 MobileQ9mbs 601 9 Mbits sec 601 625 Mobile3mbs 601 3 Mbits sec 601 625 Mobile6mbs 601 6 Mbits sec 601 625 Mobile9mbs 601 9 Mbits sec The following procedure sets up the PQA300 Picture Quality Analysis System to generate a test sequence capture that same test sequence measure the captured test sequence against the stored reference sequence and display the measurement results 1 Connect the Generator 601 Out BNC connector to the Analyzer Channel A In BNC connector using 75 Q coaxial cable as shown in Figure 4 2 Analyzer Generator SVGA video 601 out module module module 601 in 9 E Oo 5 4 5 6 7 8 9 10 11 12 lje To 601 digital 601 Out To SVGA video monitor monitor Figure 4 2 Initial connections for the functional check PQA300 Picture Quality Analysis System Service Manual 4 5 Performance Verification 4 6 10 11 12 13 14 Use the BNC to BNC coaxial cable to connect the Channel
183. t of the board and the two metric screws on the left side that attach the interface board to the chassis see Figure 6 23 for the screw locations Reinstall the Interface Board Install the interface board onto the mainframe chassis as shown in Figure 6 23 1 Orient the interface board so that the board components are facing up and the mouse keyboard connectors are to the left 2 Align the interface board mounting holes with the chassis studs and place the board onto chassis PQA300 Picture Quality Analysis System Service Manual 6 33 Maintenance 6 34 VAN NN NANNAXAS O Figure 6 23 Screw locations for the interface circuit board Attach the interface board to the chassis with five T15 screws through the front of the board and two metric screws at the side connectors Torque the T15 screws to 8 in lbs Torque the metric screws to 2 in lbs Route both fan wire harnesses through the slot in the chassis as shown in Figure 6 24 Plug the left side fan wire harness into the interface board J410 left FAN connector as shown in Figure 6 24 Plug the right side fan wire harness into the interface board J420 right FAN connector as shown in Figure 6 24 Route the speaker wire harness through the top right chassis ventilation hole as shown in Figure 6 24 Plug the speaker wire harness into the interface board J980 connector as shown in Figu
184. t oscilloscope trigger polarity to negative The display will look approximately as shown in Figure 4 7 11 Verify for that the Rise measurement is 1 2 ns or less PQA300 Picture Quality Analysis System Service Manual 4 15 Performance Verification Check Analyzer Channel A Out Loop Through Amplitude 4 16 Figure 4 7 CH 1 rise time m Using the 75 Q coaxial cable connect the analyzer Channel A Out connector through the 75 Q to 50 matching pad to the CH1 input of the test oscilloscope Connect the generator 601 Out connector to the analyzer Channel A In connector as shown in Figure 4 8 If the test oscilloscope is not already set up as shown in Table 4 5 make those setups now then go to step 4 Click on the Generate soft key to start sending the video test sequence The display that results when the setup is completed should look approxi mately as shown in Figure 4 4 From the test oscilloscope record the CH 1 High amplitude of the digital waveform The value is approximately 400 mV PQA300 Picture Quality Analysis System Service Manual Performance Verification Analyzer Generator SVGA video CH A out module module module ChAin E Q O one gt D ol E 4 5 6 7 8 9 10 11 12 o To 601 digital 601 Out To SVGA video monitor monitor Figure 4 8 Connection for analyzer C
185. the location of the test point Set the DVM to measure DC voltage on the 2 V range Connect the GND lead of the DVM to instrument chassis and the lead to TP75 Check for a reference voltage of 1 250 V 3 mV If the reference voltage is correct continue with the encoder auto calibration routine If the reference voltage is out of tolerance do not run the auto cal ibration routine Refer the problem to a qualified service person Replace the PQA300 cabinet to allow the operating temperature to stabilize PQA300 Picture Quality Analysis System Service Manual Adjustment Procedures Decoder circuit board Encoder circuit board Board Guides ms r f I d ii gr m t A Figure 5 2 Locating the decoder and encoder circuit boards 1 250 V Reference lt Rear of instrument Figure 5 3 Location of TP75 the 1 250 V encoder auto cal reference test point PQA300 Picture Quality Analysis System Service Manual 5 5 Adjustment Procedures Run the Encoder Auto 1 Allow the PQA300 to completely warm up about 20 minutes before using Calibration Routine the automatic calibra
186. tion click the OK button to accept the change and exit the menu Choose Folder Ed Please choose the installation folder Path c Projects PQA300 Directories 4 Projects X Paasoo Cancel Network Drives amp J c c doclab3 5 Click the Next button to continue the process The next window is the selection window for choosing the test sequence or sequences you want to store on the hard drive A 6 PQA300 Picture Quality Analysis System Service Manual Appendix A Software Repair 6 Click in the check box to select a test sequence for installation At this point all of the sub components of the selected test sequence generator generator plus reference and reference plus are selected for installation NOTE The selections available under the Change soft key apply only to the highlighted test sequence name If you want to make change selections for another sequence highlight the sequence name before you click on the Change soft key Select the components you want to install clear the components you do not want to install Components Cheer 601 525 287075 K Flower 601 525 OK Soccer 601 525 OK Description Click change to select from Generator _Change _ Reference Header Only and Header Plus sequences Space Required 287075 K Space Available OK 7 If you do not want to install all of the sub components of a test sequence click on the C
187. tion feature This permits all the circuitry to stabilize The auto cal adjustments are then optimized for the normal operating temperature 2 Click the Other soft key to display the selection menu and then click on Hardware Settings and Diags to display the Hardware Settings menu shown in Figure 5 4 You will get a message telling you that all PQA300 applica tions must be stopped to continue Click OK to continue Hardware Settings amp Diagnostics Ed Card Locations 7 G D h e E Cancel e a n n c 1 e c Help a T a gu EE aq rd e t E Enc Dec T o s Diags E T 1 3 4 WARNING Altering card locations will require you to reconfigure rear panel cable connections See Help for details Figure 5 4 Hardware settings menu 3 Click on the Enc Dec Diags soft key to display the Encoder and Decoder Diagnostics menu shown in Figure 5 5 5 6 PQA300 Picture Quality Analysis System Service Manual Adjustment Procedures Encoder Decoder Diagnostics amp Auto Cal x Encoder Diagnostics Encoder Auto Cal Results Data path from FPGA thru EDH coproc test passed Comb memory connection test sss passed A D 1 connection isolation test passed A D 2 connection isolation test passed End decoder diagnostics Figure 5 5 Encoder Decoder diagnostics and Encoder Auto Cal 4 Click the Encoder Auto Cal selection 5 After the auto calibration has finished
188. tolerances where applicable If equipment is substituted it must meet or exceed the tolerances listed Table 5 1 Required equipment list Test equipment Characteristic Example Frequency counter with 1 MG Frequency 100 MHz Hewlett Packard Model test probe 10 digit readout accuracy 0 1 53131A ppm Referenced to WWV GPS or with a high accuracy time base Screwdriver with T 15 Torx Tip Standard tool Adjustment tool Plastic handle small metallic Tektronix part number bit Less than three inches 003 1433 01 overall Digital Voltmeter DC 1 V to 20 V accuracy Tektronix DM2510 0 596 Programmable Multimeter PCI circuit board extender 5 V 32 bit PCI bus extender Kaitek Engineering card Model 34 06 TP Tektronix part number 018 0226 00 DSP 27 MHz Oscillator Frequency Adjustment Use the following procedure to adjust the oscillator frequency of the analyzer and generator DSP modules NOTE It is not necessary to do this adjustment and it should not be attempted if the oscillator frequency is within specification when checked in the performance verification procedure If the oscillator is not working or cannot be adjusted refer to the Maintenance section on page 6 8 for POA300 module replacement instructions PQA300 Picture Quality Analysis System Service Manual 5 1 Adjustment Procedures 5 2 Test Equipment Setup 1 Set up the test equipment Table 5 2 Frequency counter setup Measure Fre
189. ts Create function files that perform a complete measurement generate a sequence capture and measure it and display the measurement results Define preference setups that restore often used application configurations Load reference and generator video test sequences from CD ROM Store and retrieve results to and from a floppy disk the hard disk or the network file systems when connected to a network Configure system settings such as time outs measurement limits and display model parameters Enter control commands through the keyboard and with mouse clicks on the virtual front panel display Print results and screen captures or save them as PostScript or ASCII text files for later printing or transfer to other applications such as a spreadsheet or database program Access online help for the system PQA300 Picture Quality Analysis System Service Manual 1 3 Specifications Specification Tables Performance Conditions 1 4 The tables list the specifications for the PQA300 Picture Quality Analysis System Refer to the following definitions for an explanation of each specifica tion table column heading The following definitions describe the information you will find in the specifica tion tables Specification A document or a section of a document that lists and describes characteristics and performance requirements of equipment and certain programming material Characteristic A property of the product
190. type and rating specified for this product Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by qualified service personnel Do Not Operate in Wet Damp Conditions Do Not Operate in an Explosive Atmosphere Keep Product Surfaces Clean and Dry PQA300 Picture Quality Analysis System Service Manual xi General Safety Summary xii Symbols and Terms A A Terms in this Manual These terms may appear in this manual WARNING Warning statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product Symbols on the Product The following symbols may appear on the product A CAUTION Protective Ground Refer to Manual Earth Terminal PQA300 Picture Quality Analysis System Service Manual RE Service Safety Summary Only qualified personnel should perform service procedures Read this Service Safety Summary and the General Safety Summary in the product service manual or the instruction manual Do Not Service Alone
191. uality Analysis System assembly removal and replacement An anti static wrist strap for safe handling of assemblies containing static sensitive devices A screwdriver with T10 T15 and T20 Torx tips to remove the cabinet cover and the module mounting screws A 1 4 inch or larger flat tip screwdriver An 8 inch adjustable wrench or appropriate size open end wrench an aid for cabinet removal Smooth jaw pliers example KLEIN D306 51 2C Remove the bezel trim ring to permit removal of the the keypad assembly the interface circuit board and the CD floppy disk drive assembly The front bezel snaps onto the chassis There are three snaps across the top and three across the bottom Remove the front panel bezel as follows 1 Use smooth jaw pliers to grasp the On Stby key and pull straight out on the key to disconnect the key cap from the switch Use your fingers to lift up on the back edge at the top of the bezel to release the bezel from the snaps If you use a tool for leverage be careful not to bend the fingers of the EMI shielding strips After you have released the snaps across the top pull the top of the bezel toward you slightly to clear the chassis This should release the bottom of the bezel from the chassis Lift the bezel off the front of the chassis The cabinet must be removed to access any of the POA300 application modules and to access the mainframe modules and cable connectors to the controller board Use the
192. uku Shinjuku Horizontal and vertical detail Slow pan CCIR 37 5 Wool Balls of wool Moving colors Medium CCIR 27 Popple Popple Moving colors Pan rotate CCIR 28 Lily Lily Pond Luminance resolution Still CCIR 1 PQA300 Picture Quality Analysis System Service Manual C 1 Appendix C Video Test Sequences Table C 2 Video test sequences for 601 625 format Disk File number name 1 Flower Soccer Kiel 2 Tempete Susie Tennis 3 Ski Auto BBC 4 Diva Mobile Sailboat 5 Wool Popple Lily Sequence title Flower Garden Soccer Kiel Harbor 4 Tempete Susie Table tennis Ski race Auto race BBC disc Diva Mobile and Calendar Sailboat Balls of wool Popple Lily Pond Characteristic Color details landscape Sports action Luminance detail land scape Horizontal vertical lumi nance color detail Skin tone talking head Multiple random motion sports Sports moving objects Sports moving objects Random movement Titles on busy scene Random motion of objects Moving colors Moving colors Moving colors Luminance resolution Motion Slow Pan Fast Zoom Random motion Slow Pan Pan zoom Fast Circular Slow Slow Slow Medium Pan rotate Still Source CCIR 15 RAI CCIR 26 CCIR 44 CCIR 16 CCIR 29 RAI RAI CCIR 23 CCIR 43 CCIR 30 CCIR 14 CCIR 27 CCIR 28 CCIR 1 The impaired video test sequences are provided to check the functionality of
193. ules i i epar eb ME a amas tree 8 1 Using the Replaceable Parts List 8 2 Abbr vi tiOns i uoo nas sara Pons ba bai ative e pene eret rtere dea 8 2 Mfr Code to Manufacturer Cross Index 8 2 Appendices Appendix A Software Repair aes eA Re era a EST A 1 If an Application Locks A 1 Creating and Using an Emergency Repair Disk A 1 Creating an Emergency Repair Disk A 2 Using the Emergency Repair Disk A 3 Reinstalling the PQA300 Picture Quality Analysis System Software A 4 Installing the PQA300 Application Program A 4 Standard Instrument Encoder and Decoder Driver A 4 Installing the Generator and Reference Sequences A 5 Appendix B PQA300 Directories and Files B 1 Appendix C Video Test Sequences visui os Spi s En C 1 iv PQA300 Picture Quality Analysis System Service Manual Table of Contents List of Figures Figure 1 1 Components of the PQA300 Picture Quality Analysis System ucro eme een na ya oe an ete de ede a nie ase nette 1 1 Figure 2 1 PQA300 system rear panel 2 2 Figure 2 2 On Stby switch 2 5 Figure 2 3 Virtual front panel with soft key menus 2 8 Figure 2 4 Sup
194. up screen option If you don t have the emergency repair disk you will have to reinstall Windows NT Refer to the Windows NT System Guide for the procedure required to restore your system You may also need the emergency repair disk to restore user passwords if they are forgotten Be sure to update the emergency repair disk each time you add a user or change a password CAUTION The files on the Emergency Repair Disk are PQA300 specific that is the disk shipped with an PQA300 is the ONLY one that will work with that unit Do not lose this disk If you lose the Emergency Repair Disk provided with your PQA300 create a new one as described below To create an emergency repair disk mark a High Density 3 5 inch disk clearly as the emergency repair disk for PQA300 serial number BOxxxxx and then perform the following steps NOTE The emergency repair disk is PQA300 specific Make sure that the emergency repair disk is clearly marked with its PQA300 serial number The serial number of your PQA300 analyzer appears on the original emergency repair disk and on the instrument rear panel 1 Choose Run from the Windows NT Start menu 2 Type rdisk in the Run dialog box The Repair Disk Utility dialog box as shown below opens r Repair Disk Utility ate This utility updates the repair information saved when you installed the system and creates an Emergency Repair disk The repair information is used to recovera bootable s
195. ups A preference preset file contains all of the static configuration elements defining the POA300 behavior Once saved to the preference directory a preset file can be used to restore that configuration of the instrument settings From the factory there is one preset installed and one created at the first shutdown of the POA200 application These are called factory and shutdown The factory preset is a read only file which is used to set up the PQA300 for factory and service testing procedures Use the factory preset to remove any settings remaining from previous operation and begin a new setup with known PQA300 Picture Quality Analysis System Service Manual Operating Information settings After making new configuration settings give the preset a new name and save it to make a new preference preset At shutdown of the PQA300 application the present settings are saved for restoration in a preference preset file called shutdown If the shutdown preset is the selected preference preset for startup those shutdown settings are restored the next time the application is started For additional information on creating and activating preference presets refer to Preference Configuration Menu in the PQA300 Picture Quality Analysis System Service Manual PQA300 Picture Quality Analysis System Service Manual 2 7 Operating Information Virtual Front Panel Controls Indicators and Display Once you have correctly completed the login
196. ure 8 2 Modules and mounting hardware 8 9 PQA300 Picture Quality Analysis System Service Manual Replaceable Parts Replaceable parts list Fig amp index Tektronix Serialno Serial no number partnumber effective discontd Qty Name amp description Mfr code Mfr part number 8 3 1 211 0895 00 2 SCREW MACH M2 6 X 0 45 X 8MM PHILLIPS PNH 0KB01 211 0895 00 ZINC YELLOW 2 211 0722 00 80 SCREW MACHINE 6 32 X 0 250 PNH STL CDPL OKB01 ORDER BY T 15 TORX DR DESCRIPTION 3 679 4125 01 1 CIRCUIT BD ASSY KEYPAD TESTED WIRED 80009 671 4125 01 4 260 2691 00 1 SWITCH KEYPAD ELASTOMEC TV GRAY amp TK2376 260 2691 00 TRANSLUCENT RESISTANCE gt 10000HMS JAMAICA 5 614 0943 01 1 KEYPAD ASSY RFA300 80009 614 0943 01 6 366 0790 00 1 KNOB TV GRAY 0 920 ID X 0 9250 OD X 0 4750 TK1163 366 0790 00 H PC ABS BAYBLEND FR110 7 200 4384 00 1 BEZEL PC ABS 9 X 17 X 1 50 JAMAICA TK2385 JAMACIA FRONT TRIM HOUSING 8 366 0791 00 1 KEYCAP POWER 0 2X0 4X1 326 POLYCARBO 7X318 366 0791 00 NATE 9 334 9582 00 1 MARKER IDENT LABEL POWER BUTTON 2 000 X OKB05 334 9582 00 0 735 10 352 1068 00 2 LENS LIGHT CLEAR ACRYLIC LIGHT PIPE 1 729 7X318 352 1068 00 X0 140 11 407 4074 00 1 BRACKET DISPLAY ASSEMBLY TK1943 407 4704 00 12 679 4952 00 1 CIRCUIT BD ASSY INTERFACE 80009 671 4952 00 13 650 4004 01 1 DISPLAY ASSEMBLY 80009 650 4004 01 OPT LC 14 119 5934 00 1 TOUCH SCREEN TOUCH PANEL ASSEMBLY TK6074 9504 REV G 8 WIRE ANALOG R
197. urst locks to NTSC or PAL composite video NTSC NTSC No Setup PAL B D G H and I Supplemental information Does not lock to monochrome input video Passive loop through BNC 75 Q compensated 40 dB to 6 MHz on composite video 0 6 dB maximum to 6 MHz for composite video Correct color framing detected for signals having no greater than 45 degrees SCH phase error Color framing is maintained once obtained until the SCH phase error exceeds a nominal value of 125 degrees Burst must be present and be within 3 dB of nominal levels SNR gt 50 dB SNR is defined as the ratio of 0 714 Vp p video to the RMS value of white gaussian noise over a 5 MHz bandwidth Genlock will be maintained with a SNR gt 40 dB or 60 Hz hum lt 0 714 Vp p x2 5 degrees over a burst amplitude range of nominal value 3 dB x1 degree over input signal APL range of signal APL 10 to 90 Output Channels Analog video format NTSC NTSC No Setup NTSC SMPTE 170M with and without PAL B D G H and I pedestal PAL CCIR 625 Composite output 75 BNC Composite return loss gt 40 dB to 5 5 MHz at 75 Q S Video Y C output 75 Q Standard S Video Y C S video crosstalk 250 dB down S video return loss 25 dB typical to 5 5 MHz at 75 Q 601 In Format 270 MB s serial component video Complies with ITU R BT 601 BT 656 and SMPTE 259 M Input type Non loop through 75 2 terminated SMB Return loss 215 dB to 27
198. ut BNC ird 0 601 Out to Serial Analyzer SMB L oe Filter Chroma Parallel 601 Chroma 27 MHz Sync Stripper PCI Addresses Interface Data PCI Bus Figure 3 9 Decoder simplified block diagram Calibration Generator Sync Stripper The calibration circuitry applies accurate 2 and 3 volt DC levels to the video input circuitry The FPGA field programmable gate array device averages the resulting values from the converters and compares them to an internal constant The results of the comparison drives an LED indication circuit to show if the relative A D output value is high or low There is also a diagnostic mode signal a 2 V ramp that can be applied to the video output amplifiers for testing Calibration and diagnostics modes are normally manually selected by setting the mode switch on the board However when the mode switch is set to the run position the diagnostics routines can drive the DAC circuitry for closed loop testing The sync stripper ASIC outputs a signal during the sync portion of the video that is used for coarse timing The input clamp circuit must be running for this sync stripper to work correctly The chroma output is applied to 2 1 MUX that selects between the S Video chroma and the chroma stripped from the composite video signal for the color lock circuit The sync is applied to the FPGA device PQA300 Picture Quality Analysis System Service Manual 3 13 Theory of Operation
199. utine by first Amplitude Accuracy running the auto calibration feature then checking that the Luminance and Chrominance gain and DC offset values are within the specified ranges Both the composite video and S Video output are checked Run the Encoder Auto Cal Routine Allow the PQA300 to completely warm up about 20 minutes before the using the automatic calibration feature This time permits all the circuitry to stabilize and the auto cal adjustments are then optimized for the normal operating temperature 1 Click the Other soft key to display the selection menu and click on Hardware Settings and Diags to display the Hardware Settings menu seen in Figure 4 18 You will get a message telling you that all POA300 applica tions must be stopped to continue Click OK to continue Click on the Enc Dec Diags soft key to display the Encoder and Decoder Diagnostics menu shown in Figure 4 19 Click the Encoder Auto Cal selection After the auto calibration has finished run the Encoder Diagnostics to check for pass or fail of the diagnostic tests If the the encoder shows diagnostic failures after the auto calibration refer your PQA300 system to a qualified service person for repairs PQA300 Picture Quality Analysis System Service Manual 4 35 Performance Verification Hardware Settings amp Diagnostics Ed Card Locations G D i e E Cancel e a n n c 1 e c Help a T a A MEGA In IR e t Enc Dec r 5 o r Diags E
200. ve as type Text Files tet Cancel Figure 2 8 The Save As menu for saving results text files Save As Save jn E PQA300 c EE BH bin m Network Neighborhood a capture A Mbd cse generate gales og ponsoo not workin C3 Tektronix MPEG Test System C New Folder File name fresults tat Save as ype Text Files txt Cancel Figure 2 9 The network selection menu for choosing the location to store results text files Display Settings Click on the Display Setting selection in the Other menu choices to show the Display Settings controls see Figure 2 10 The display setting controls are used to adjust the brightness and contrast of the maps and video displays individually The controls adjust the display that is active when the Display Settings menu is activated The menu label changes to indicate the active display type Video POR Maps or PSNR Maps PQA300 Picture Quality Analysis System Service Manual 2 15 Operating Information Display Settings Video Ea Contrast Cancel Default Help Maintain Aspect Ratio v Brightness Figure 2 10 Display settings controls Select Maintain Aspect Ratio to have map or video displays keep the same vertical to horizontal ratio when you resize the POA300 window If Maintain Aspect Ratio in not checked the map and video displays resize in the same proportions as the POA300 window Hardware Settings
201. ysis System Service Manual 5 3 Adjustment Procedures Encoder Auto Cal Check the Encoder Reference Voltage 5 4 23 24 25 26 27 28 29 30 Touch the frequency counter probe tip to the generator DSP 27 MHz Clk test point Adjust the frequency counter for a reading of 27 MHz 5 Hz 26 999 995 to 27 000 005 Hz Turn off power to the PQA300 Remove the generator DSP module from the PCI extender board Remove the extender board from the backplane connector Reinsert the generator DSP module in the backplane module slot Align the module connector with the backplane connector and press down firmly to seat the module Reinstall the module hold down screw This completes the adjustment procedure for the DSP modules The adjustment procedure for the encoder module consists of checking the reference voltage for the correct level and running the encoder auto calibration routing The automatic calibration routine compensates the adjustments of the encoder module for temperature changes and aging Typically you should use this feature about every six months to maintain optimum encoder operation Use the following procedure to perform the encoder module adjustments Locate the 1 250 V reference voltage test point TP75 The loop of the test point is near the center of the encoder board just above the gray plastic shell of a test connector Figure 5 2 shows the location of the encoder circuit board and Figure 5 3 shows
202. ystem in case offailure This utility should not be used as a backup tool Create Repair Disk Exit Help PQA300 Picture Quality Analysis System Service Manual Appendix A Software Repair 3 Click Update Repair Info to save your current configuration A message appears to remind you that earlier repair information is overwritten Click Yes to continue 4 When the process is complete a message appears to ask if you wish to create an Emergency Repair Disk Click Yes The message shown below appears Repair Disk Utility ES Label a floppy disk Emergency Repair Disk and insert it into drive A Select OK when the disk is in the drive Warning All data in the floppy disk will be erased E Cancel 5 Insert a 3 5 inch disk in drive A and click OK Rdisk formats the disk and copies the configuration files onto it 6 When the operation is complete click Exit in the Repair Disk Utility dialog box Remove the disk from drive A and keep it in a safe place Using the Emergency Always refer to the Windows NT documentation if you need more information Repair Disk Verify that you have a source of setup information available the Win dows NT back up software package Insert the Windows NT Setup disk Restart the PQA300 When the Windows NT Setup Screen appears press R repair When prompted insert the emergency repair disk Sy Me ee OA NS The emergency repair disk performs the following

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