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Section 6:Measure Mode - Advanced Test Equipment Rentals

1. VM700A Pin No 20 Terminal Pin No Modem Pin No VM700A Pin No 6 DSR connection poss ibly not needed Connecting Printers Connecting an EPSON LQ 570 This section discusses connecting an EPSON LQ 570 Apple LaserWriter HP LaserJet HP DeskJet HP ThinkJet or generic ASCII printer to the VM700A The default configuration files are set for use with the EPSON LQ 570 letter quality printer with serial interface C 823051 The default configuration of the LQ 570 printer is adequate for use with the VM700A Refer to the user s manual for the printer for information on any changes you might wish to make to the printer setup With the VM700A and printer power off connect the serial printer cable from the 25 pin DB 25 female connector on the printer rear panel to PORT 1 on the back of the VM700A a 25 pin DB 25 male connector If you have not changed the factory default values in the Communication Setup file all you need to do now is turn on the VM700A and the printer If you have changed some factory default values be sure the file contains the values shown in the following example The following partial listing shows the values that should be set in the Commu nications Setup file in order to use an Epson LQ 570 printer Copy Port 1 Port Serial Port 1 Protocol None Format Epson LQ Baud Rate 9600 Report Flow Control CTS RTS Port Serial Port 1 Character Size 8 Format Epson LQ Parity None
2. Tektronix VM700A MEASUREMENT ser IRE FIX 100 0 116 Waveform Vector Picture Measure OURCE e A B e e u Help Configure Select Line O Move O4 O Expand O ise reduction RESET 525 line NTSC No Filtering Slow clamp to 0 00 V at 6 63 us Display Graticule Intensity Figure 2 2 VM700A front panel Touch Screen Manual and Auto Operational Mode Buttons The display CRT area of the VM700A is also a touch screen for user input The screen displays input waveform signals the digital vectorscope a low quality television picture of the input signal graphic measurement displays and automatic measurement results Many operations are performed by selecting soft keys menu controlled touch screen controls at the bottom of the display when applicable selection values are changed by rotating the control knob The top row of buttons controls the operational modes the major functions The VM700A has five operational modes four manual modes and Auto mode The VM700A Option 01 NTSC amp Option 11 PAL User Manual 2 3 Section 2 Installation and Operation Freeze Source Selection and Average Functions Support Functions manual modes are Waveform Vector Picture and Measure The power on default mode is Wavefor
3. Tektronix yM700A Wie MEASUREMENT SET Waveform Vector Picture Measure Auto SOURCE B Cc y Configure Function Select Line O Move ot O ExpandO y 30 0 Noise reduction RESET MicroSeconds APL 49 9 Precision Mode off 525 line NTSC No Filtering Synchronous sync Source Slow clamp to 0 00 V at 6 63 us Frames selected 1 2 1H cursors sync Noise Extra Filter Clamp Display 15 05 dB Functions select Couple Display Graticule Intensity Volts TRE FIx Volts ZIRE FLT j 1 4 0 04 1 1 i 1 i 4 0 1 1 j 1 1 20 0 1 0 2 1 1 0 3 40 0 4 LO 1 i F1 j i L17 e pete 0 3 0 2 0 1 0 0 0 1 0 2 0 3 0 4 Noise reduction RESET MicroSeconds Pra ore SE ee APL 50 1 Precision Mode Off T TUS 525 line NTSC No Filtering Synchronous Sync Source 10 0 20 0 30 0 40 0 50 0 60 0 Slow clamp to 0 00 V at 6 63 us Frames selected 1 2 Noise reduction RESET MicroSeconds Sinewave at middle of screen is too small or frequency too low for measurement APL 49 9 Precision Mode Off Time from L to R 0 142 MicroSeconds Vertical delta 0 000 volts 525 line NTSC No Filtering Synchronous Sync Source Frequency 1 T 7 040347 MHz 10 4 point Slow clamp to 0 00 V at 6 63 us Frames selected 1 2 EN
4. Vector Line L 17 F2 Angle deg 0 3 Gain x 1 000 0 000 dB 525 line NTSC Burst from source In nvramO E xecutable F les Video 0 ptions n I r Audio Video Component Timing Camera_Testing pi n Echo_Rounding Teletext i i i Video Previous Leav Video Audio Diags Options Selecton Directory Setup 7 5 The VM700A Video Measurement Set EC Declaration of Conformity Tektronix Holland N V Marktweg 73A 8444 AB Heerenveen The Netherlands declare under sole responsibility that the VM700A meets the intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities EN 50081 1 Emissions EN 55022 Class B Radiated and Conducted Emissions EN 50082 1 Immunity IEC 801 2 Electrostatic Discharge Immunity IEC 801 3 RF Electromagnetic Field Immunity IEC 801 4 Electrical Fast Transient Burst Immunity High quality shielded cables must be used to ensure compliance to the above listed standards Table of Contents TISCOL FISULOS ie A sap sin iv List Of Tables 2 2 eu a v Safety Summary 2c 02 2 4 teret E ie ek ee VEO CREE seele vii Section 1 Introduction and Specification Manual Overview nr DN e e EA aa EE AE 1 1 Instrument Overview eeeeeee ee RR e e e s 1 1
5. tx1 which would define a measure ment environment associated with the signal from your primary transmitter To avoid confusion you should give all the files associated with this environment the same name They reside in different directories so there is no risk of name collision This arrangement whereby the file in the Video Source Files directory defines the measurement environment while the Video Source file assigns the environ ment to a channel gives the VM700A maximum flexibility in meeting a variety of signal monitoring needs Pre defining a number of different environments one for each configuration of equipment to be monitored allows you to set up the VM700A for different measurement assignments by simply changing entries in the Video Source file VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 13 Section 3 Configuring the VM700A 3 14 Auto_Limit Files Directory The Auto_Limit Files directory contains limit files used by Auto mode A limit file lists all the measurements available for the Auto mode Each measurement has limits that when exceeded produce Caution or Alarm messages on the display and can generate error logging Both Caution and Alarm limits can be set for every measurement The Auto Limit file in use is specified by the active file in the Video_Source Files directory A file from the Selected Measurements directory is used in conjunction with a file from the Auto_Limit Files direc
6. Instrument Specifications oso Res a dr eich 1 3 Section 2 Installation and Operation Power Requirements ooo 2 1 Changing Line Voltage Range and Fuse 0 0 0 e cee eee eee 2 1 Power Cord ee eb exte eerie dedit Ure eut eda 2 1 Calibrating the Touch Screed o ooooooococccco ee 2 2 Front Panel Operation es elo Rp een re tee ek ge ME NE Hee 2 3 Touch Screen costera A ER es ead 2 3 Manual and Auto Operational Mode Buttons 0 eee eee eee eee 2 3 Freeze Source Selection and Average Functions 0 0 0 e eee eee eee eee eee 2 4 Support Functions u mr bed ei ee bd Ag dd deh byt is 2 4 Control Knob crt bs bI RA Geel EB a are S 2 5 Equipment Signal Sources Required ooooococoococooooo eee 2 6 Bandwidth a Es URN an E ee Net dus e 2 6 Connecting Inputs and Outputs 0 eee cette eben eee 2 6 Connecting PHntets ee el ren RR BIA Rag AEA EPOR S 2 9 Connecting an EPSON LQ 570 0 cc nent eens 2 9 Connecting an Apple Laser Writer 0 0 2 ec cee eee 2 10 Connecting an HP LaserJet HP ThinkJet or HP DeskJet o ooooooooooooo o 2 10 Connecting amASEM Printer oes bes cities wee see CERO SEWERS bea aha 2 11 Section 3 Configuring the VM700A Configure Operations ny ss ur nes ee e be eee dah ran edad es 3 3 The Configure Directory Structure 0 0 ee 3 3 Supplied Directories and Files ee cece cence 3 5 Creating and Deleting Files v
7. Log Reset Character None Port None Carrier Detect disabled Format Epson LQ Remote Port None Serial Port 0 Making Your Own LQ 570 Cable If the correct printer cable is not readily available one can be easily constructed A male 25 pin DB 25 connector a VM700A Option 01 NTSC amp Option 11 PAL User Manual 2 9 Section 2 Installation and Operation female DB 25 connector and an appropriate length of four conductor cable are the materials needed for the cable Table 2 2 lists the wiring connections for making a cable to use with an LQ 570 Table 2 2 LQ570 Cable Connections Male DB 25 Connector Pin Number LQ 570 end 1 shield ground Female DB 25 Connector Pin Number VM700A end 1 shield ground 3 RXD 2 TXD 20 DTR 5 CTS 7 signal ground 7 signal ground Connecting an Apple Laser Writer Note the following setups when connecting an Apple LaserWriter to a VM700A serial port Setting up the VM700A In Configure mode set the Copy Format Report Format and Log Format in the Communication Setup file to PostScript Set the Copy Port and Report Port to Serial Port 0 or Serial Port 1 as appropriate Set the selected port s Baud Rate to 9600 Flow Control to XON XOFF Character Size to 8 Reset Character to Ctrl D and Carrier Detect to Disabled Setting up the LaserWriter Set the rear panel switch to the 9600 position The cable connecting the VM700A and the LaserWriter shoul
8. amp Exit Rename Delete or Create a directory or file Once a password is set it will be requested when you attempt to Update amp Exit Rename Delete or Create a directory or file i e every time you change the contents of non volatile memory If the correct password is entered the requested action is completed The VM700A allows three unsuccessful attempts to enter a password before displaying the message No Password no access and canceling the requested action Changing the password to null has the same effect as disabling the Password function with the DIP switches File s in the Selected Measurements directory contain a list of all the measure ments Auto mode can perform They allow you to select a subset of measure ments for the VM700A to perform The current Selected Measurements file provides Auto mode with a list of measurements to perform while the current Auto Limit file provides the limits at which those measurements generate Caution and Alarm messages The Selected Measurements System Default file is the only file available for selection when the instrument is shipped This file cannot be edited and all the VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A measurements within it are Selected You must use the Create File function to copy the contents of the System Default file into a new file and then select the new file before you can select a subset from the measu
9. i i 3 3 0 3 0 2 0 1 0 0 0 1 0 2 0 3 2 4 Noise reduction RESET MicreSeconda APL 50 1 Preciaion Mode Off 525 line NTSC Ne Filtering SYnchronoua Sync Source Slew clamp te 0 00 V at 6 63 us Framea selected 1l 2 Sinewave at middle of acreen ia tes amall or Frequency too low for measurement Time from L te Rs 0 142 MicroSeconda Vertical delta 0 000 Volta Frequency l T 7 040347 MHz 10 4 point Center Center Lack Reset Reset Curaora Left a Right Right Curacra Diffa Stay On Figure 4 3 Left cursor locked to 90 point of sync edge right cursor to 10 point NOTE Always make sure the Left cursor is to the left of the Right cursor If it is not the Time from L to R readout will indicate the time duration of a frame of video minus the time interval between the cursors Also measuring time durations with cursors is not limited to a single line width or a field Cursors can measure up to one full frame before they wrap around Using Cursors to Measure Sine wave frequencies can be easily measured with cursors The following 4 14 Frequency procedure produces the best accuracy using asynchronous sampling and with averaging on to reduce the noise To Measure a Sine Wave Frequency Expand the desired sine wave for example color burst so two cycles fill the majority of the screen Position the sine wave zero crossings to occur at the horizontal reference line Select the Cursors soft key and position a zero cros
10. the current video source as indicated by the front panel Source button determines which entry is read from the Source Selection Video file This in turn determines which file is read from the Video Source Files directory This file determines which files to use to get operating information from each of several directories VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 11 Section 3 Configuring the VM700A Video Source A B or C Front Panel Button Source Selection Video File Video Source F iles Directory Auto Sync Source Source Name Printout Title Auto Limit Files Directory Measure Limit Files Directory Measurement Locations Directory Selected Measurements Directory Figure 3 4 How the VM700A gets parameter information 3 12 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A Video Source Files Files in the Video_Source Files directory tell the VM700A where to find Directory important parameter information These files contain the following entries Auto Limits File the name of the file in the Auto Limits directory that specifies the limits used for Auto mode measurements Measure Limits File the name of the file in the Measure Limits directory that specifies the limits used for Measure mode measurements Measurements Location File the name of the file in the Measurements Loca tion directory that speci
11. 04 Option 30 Component Version 1 01 Option 20 Teletext Version 1 01 Option 1G Echo Rounding Version 1 00 Option 21 Camera Testing Version 1 02 Configure Function Time Files Keys Figure 3 1 Typical main Configure menu VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 1 Section 3 Configuring the VM700A The password if any that must be used for controlling access to the configuration files The Configure button provides access to utilities that allow you to edit files that control these and other aspects of the VM700A operating environment Pressing the Configure button brings up the main Configure display showing the firmware option number and version the amount of non volatile memory used and free in bytes and three soft keys menu controlled touch panel controls labeled Time Configure Files and Function Keys If a copy is queued for printing in the printer spooler another soft key labeled Cancel Copy is also displayed These soft keys are defined as follows Time Pressing this soft key brings up a display and submenu that allows you to set the internal clock of the VM700A This procedure is described later in this section of the manual Configure Files Pressing this soft key brings up a display of the nvramO ConfigFiles directory which gives you access to files and directo ries that control VM700A operations Function Keys Pressing this s
12. 1 Typical Measure Mode menu choices 0 0 0 e eee eee eee 6 1 Figure 6 2 Measure menu of Camera Video Option 00 0 0 e eee eee 6 2 Figure 9 1 Power Up Diagnostics Selection display 0 0 0 0 00 00 9 8 Figure 9 2 Debug mode terminal screen display 0 0 cee eee eee eee 9 12 iv VM700A Option 01 NTSC amp Option 11 PAL User Manual Contents List of Tables Table 1 1 Physical Characteristics 2 cece cece eens 1 3 Table 1 2 Power Requirements 0 ccc eee eee cence 1 3 Table 1 3 Environmental Characteristics 1 3 lable 1 4 Remote Relay ici dd un Saito elle an bie 1 3 Table 1 5 Optional Power Cords ooooocoocoooooror eh 1 4 Table 2 1 Typical RS 232C Cable Wiring 0 0 0 2 cece cee eee 2 8 Table 2 2 LQ570 Cable Connections 0 0 0c eee ens 2 10 Table 2 3 Apple LaserWriter Connections 0 0 cee eee ee eee 2 10 Table 2 4 HP LaserJet Cable Connections 2 11 Table 9 1 VM700A Power Up Diagnostics 0 0 0 cece eee eee 9 2 Table 9 2 Individual Diagnostics eee 9 3 Table 9 3 Diagnostic Measurements 0 0 0 eee e 9 6 Table 9 4 A5 CPU Board Jumper Settings 0 0 cece eee 9 14 Table 9 5 Start Up Shortcuts ooo oooooocoorororr ee eee nee 9 14 VM700A Option 01 NTSC amp Option 11 PAL User Manual V Contents vi VM700A Option 01 NTSC amp Option 11 PAL User Manual Safety
13. Checks the input selection switch by setting the channel bias DACs to different levels on each channel and measuring the net bias for each switch setting Bias Control Range for each channel Checks each channel s bias control DAC for range and bit weights Verifies each DAC for independence by changing the other two and monitoring the one being tested to verify that its range and bit weight remain unchanged VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 9 Diagnostics Table 9 2 Individual Diagnostics Cont Board Tested Analog Input cont Test Name Clamp for each channel Filter Times 8 Gain Filter Slot n for slots 0 through 5 Successful completion of these tests requires that Genlock A2 Controller A8 Acquisition A7 and Analog Input A1 boards be operating correctly Description Checks each channel s clamp level DAC for range and bit weights Verifies each DAC for independence by changing the other two and monitoring the one being tested to verify that its range and bit weight remain unchanged Measures fast and slow clamp response time by timing a 100 mV clamp level change Verifies fast clamping at each possible clamp pulse width Using the ADC two Cal DAC DC levels are measured with x8 gain off two more with it on and the gain is calculated from the ratio of the differences Slot 0 is a bypass path rather than a filter slot These
14. Function Execution in Progress Press the Function button This leaves the VM700A in whatever state it was in during function execution when you pressed the button 3 24 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A Video Source The Video Source Identification file contains a series of number and text string Identification File pairs used to identify signal sources in Auto mode The number is encoded in binary format onto the line of the frame specified by the Source ID line in the Measurement Locations file the default Source ID video line is line 16 During Auto mode operation if an encoded ID number is found on the Source ID line the VM700A decodes the number and searches the Video Source Identification file for a matching number entry If a match is found the accompa nying text string is printed on the line labeled Source ID in the Auto mode display If no match is found the message Not Found is printed The Video Source Identification file can contain multiple lines The range for identifying numbers is 0 to 16383 14 bits The text string that accompanies each number can be up to 20 characters long Inserting a Video Source Identification Number The Video Source Identification number is inserted using a 148 Insertion Test Signal Generator a VITS 201 PAL Insertion Generator or similar device Pulses 1 usec wide and 1 usec apart represent binary 1 s The encoding begins
15. Measure button to select a different diagnostic or Measure mode measure ment Press any other major mode button to put the VM700A into a different mode 3 Touching Interactive Mode runs the diagnostic one group at a time Results of individual tests as well as a summary for each group of tests appear on the display Four soft keys labeled Continue Loop On Test Rerun Test and Change Run Mode respectively appear at the bottom of the display Continue runs the next group of tests VM700A Option 01 NTSC amp Option 11 PAL User Manual 9 9 Section 9 Diagnostics Diagsloop Loop On Test loops on the latest group of tests and displays the number of times the test group has been run as well as the total number of failures found Touching the Change Run Mode softkey when looping on a diagnostics test halts the test and returns the SELECT RUN MODE display Rerun Test re runs the latest group of tests Change Run Mode returns you to the SELECT RUN MODE display The Diagsloop diagnostic runs each diagnostic selected in the Diagnostics Selection file in PowerUp mode The diagnostics are run consecutively and continuously looping back to the first diagnostic after the last is completed The current loop number appears in the upper right corner of the display The message FAIL FOUND appears in the upper left corner of the display if a failure is found by any of the selected diagnostics You can either monitor the Diagsloop ex
16. Registers Description Verifies thatthe Genlock status register correctly represents the hardware configuration These tests must pass to run the lock tests Checks the board s ability to acquire and hold lock using each VCO The test forcefully breaks lock by toggling rapidly between internal and external sync with the genlock configured for the opposite standard Then the genlock is configured for the standard being tested and time to lock is measured Checks mode Genlock configuration Genlock status and filter control registers with 8 bit walking 1 and walking 0 patterns Checks analog input register for writeability no bus errors Checks DVM readback register for readability Overrange Detector Clock Detector Clamp Counters A C and Acq Sig Counters Sig0 Sig2 Checks bit4 ofthe Controller interrupt register ADC output is latched high to force the bit to set and latched low to clear it Checks bit 2 of the Controller interrupt register Disables the sample clock to cause the bit to set then re enables the sample clock to clear the bit Checks the counter chips Performs walking 1 and walking 0 tests read and write and checks countdown over several reads Register File State Machine Settings Trigger and Sequence RAM RAM FIFO Runs only on later Controller Acquisition boards Checks SRUN and TRUN lines of the settings RAM control data and address lines of the trigger RA
17. Requirements 1 3 2 1 power switches 2 1 Power Up Diagnostics 9 6 power up diagnostics bypassing 9 8 Precision Mode 4 8 Print File softkey 3 8 printer Apple LaserWriter 2 10 ASCII 2 11 EPSON LO 570 2 9 Index 3 Index HP DeskJet 2 10 HP LaserJet 2 10 HP ThinkJet 2 11 printer cable 2 9 printer cable configurations 2 8 printers 3 16 factory default 3 15 Printing Files 3 8 printout source text string 3 13 Printout Title 3 13 Protocol 3 16 Q QUICK START MODE 9 8 R read only directories and files 3 5 rear panel 2 6 Remote Control port 3 15 Remote Control Relay 1 4 Remote Operation 8 2 Report port 3 15 Report Time 8 5 Reset Character 3 17 root directory 3 4 RS 232 C serial ports 3 15 RS 232C DTE ports 2 6 Running diagnostics remotely 9 10 Running Individual Diagnostics and Measurements 9 9 S sampling asynchronous 3 18 synchronous 3 18 scheduled reports 3 21 Screen Memory 4 8 Select Line 2 5 4 1 4 10 Selected Measurements 3 20 8 5 Selected Measurements File 3 13 self diagnostic 9 1 Serial Port 0 3 15 Serial Port 1 3 15 Setting Alarm Limits 8 3 Setting Event Times 8 5 Setting the Internal Clock 3 9 signal sources A B and C 3 10 Sound in Sync 3 18 4 7 Index 4 Source and Polarity Selection 2 4 Source Name 3 13 Source Selection Video file 3 10 specifications 1 3 spooler 3 8 Start Up shortcuts 9 14 Statu
18. Then attach the right amplitude reference marker to a stable spot on the sync tip by moving the waveform to the left until the sync tip reaches the cursor This establishes the 0 point of sync Live video may require moving the sync edge a little further in both directions to find an average or stable level for the 100 and 4 12 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 4 Waveform Mode 0 points When the sync edge is now moved past the cursors the point readout is calibrated and indicates the sync edge point that intersects the cursors NOTE If the waveform point that the amplitude reference marker is attached to is moved off the display the amplitude reference marker does not remain attached to the waveform Instead it locks to the vertical scale at the point where the waveform left the display So if the level of the signal at the point where the amplitude reference marker was formerly anchored which is now off screen changes the amplitude reference marker will not track that change It may sometimes be necessary to decrease the horizontal expansion to keep both amplitude reference markers on the display when trying to find a stable point on live video to anchor them Position the sync edge under the cursors so the point readout is 90 and select the Lock Left soft key This locks the left cursor to the 90 point of the sync edge Now when you move the sync edge horizontally the left cursor
19. Timed Events File daily_events Time Channel Type Selected File Name 9 30 B function mid_morn 15 30 B report mid_pm Timed Events files use a 24 hour clock to specify event occurrences When this file is the current Timed Events file the following events are set to occur daily 1 A function called mid_morn is executed at 9 30 a m and 2 A report is generated at 3 30 p m using the Video Source file named mid_pm Two Kinds of timed events can occur a report can be generated designated as event type report in the Timed Events file or a function can be executed designated as event type function in the Timed Events file For report events the VM700A looks in the nvramO ConfigFiles Video_Source Files directory for the file named in the Timed Events file For function events the VM700A looks for the function named in the Timed Events file in directory nvram0 FunctionKeys Timed Functions The function selected as a Timed function must reside in the Timed Functions subdirectory displayed by the Function Keys soft key in the Configure menu The parameters for the Auto report selected measurement limits measurement locations etc are specified by the selected file in the Source_Selection Video file When a report time occurs the VM700A screen shows the Timed Report display unless the VM700A is in remote mode see note below The Timed Report display includes a status line showing the chan
20. digitally derived a single line is displayed with full brightness The Vector mode has an electronic graticule accompanied by digital readouts of the line selection mode System Line or Vector Line which are explained at the end of this section displayed field and line number phase Angle in degrees Gain in both dB and times gain APL level and Setup level Figure 5 1 shows a typical color bar signal on a vertical interval line of an NTSC test signal Vector Line L 17 F2 Angle deg 0 3 Gain x 1 000 0 000 dB 525 line NTSC Burst from source ran c Q 7 Ly E y E THLUULLLL I aM Y L Setup 7 5 Figure 5 1 Vector display of a color bar signal VM700A Option 01 NTSC amp Option 11 PAL User Manual 5 1 Section 5 Vector Mode 5 2 Control Knob Menu Additional information is included on the left side of the display to indicate the noise reduction if Average is on and for the PAL vector display if Sound in Sync is ON or OFF Also for the PAL vector display there is a line added to the information on the right side of the display to indicate the V axis being displayed The control knob is used in conjunction with the Move Expand button to vary the display phase Angle and Gain and with the Display and Graticule buttons to set the display s Intensity When the Select Line button is pressed the control knob performs a digital line select function Display Phase Angle When entering Vector mod
21. moves with it Notice that the left cursor is a solid vertical line and the right cursor which is still centered in the display is a dashed line Now simply move the waveform so the point readout indicates 10 The Time from L to R readout now indicates the rise time of the leading edge of sync Figure 4 3 illustrates the right cursor sitting at the 10 point and the left cursor locked to the 90 point of the sync edge Note that touching either the Center Left or Center Right soft key will move the corresponding cursor to the center of the display From this point to measure sync width from the leading edge 90 point 10 down from blanking to the trailing edge 90 point 10 down from blanking you will need to locate the 90 point on the trailing edge by repeating the above procedure First move the waveform to the left until the trailing edge of sync is in the center of the screen Next touch the Center Right soft key Move the waveform to the left and right to position the amplitude reference markers on the 100 point and 0 point of sync Position the trailing sync edge so the point readout indicates 90 The Time from L to R readout now indicates sync width from the 10 point of the leading edge of sync to the 10 point on the trailing sync edge VM700A Option 01 NTSC amp Option 11 PAL User Manual 4 13 Section 4 Waveform Mode Volta IRE ELT Ere ec us andaba acad L L L L L 3 E E 3 1 j 2 P a a 4
22. of the cursors is limited by the one percent vertical accuracy of the VM700A display Accuracy may be improved at the expense of update speed if Precision mode is on Cursor Appearance The cursors which are displayed when the Cursors soft key is selected are two vertical bars The Left cursor is a solid vertical line and the Right cursor is a dashed vertical line When both cursors are on the same point they appear as a dotted vertical line The default position for the cursors is the center of the display Each cursor has a pair of horizontal amplitude reference markers that extend from the cursor to the furthest left or right point the cursor touched on the waveform The anchor point of each amplitude reference marker is a short vertical line on the waveform The amplitude reference markers are cleared and reset when the Reset Cursors Center Left or Center Right soft keys are selected Amplitude reference markers are used to establish 0 and 100 reference levels so that the cursor can be positioned at a specific level e g 50 as needed for a measurement Cursor Status Lines Selecting the Cursors soft key displays the cursors and the submenu shown in Figure 4 3 When cursors are on three additional status lines appear 1 Sine pk pk mV freq MHz and offset mV 2 Time from L to R and Vertical Delta and 3 Frequency 1 T and point point appears as UNDEFINED point when cursors are first turned on or when the Rese
23. port The configuration parameters for Serial Port 0 and Serial Port 1 and their possible values are as follows Protocol can be set to None or SLIP serial line internet protocol Baud Rate can be set to 300 600 1200 2400 4800 9600 19200 or 38400 Flow Control can be set to XON XOFF software handshaking to control data flow CTS RTS hardware handshaking to control data flow or NONE no flow control Character Size can be set to 7 or 8 bits Parity can be set to None Odd Even Zero or One VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A Reset Character can be set to None or Ctrl A through Ctrl Z Note the Reset Character for an Apple LaserWriter is Ctrl D Carrier Detect can be enabled or disabled The default Port 1 settings are suitable for an Epson LQ 570 printer To Change a Port Configuration Oarameter Value Select the parameter you wish to change by rotating the knob until the parameter is highlighted then touching the screen over the parameter value Rotate the control knob until the desired parameter value appears Press the Accept Input soft key or Touch the screen anywhere inside the window then press the Update amp Exit soft key to save the changes Diagnostic Errors When high level diagnostics are run any errors detected are written to the File Diagnostic Errors file The contents of this file can be printed using the Print Fi
24. r a E 4 6 C FSOIS x6 eot ee Le ie uae a ERS A REECE OES SRE ES 4 6 MCArte ER 4 7 Noise O dB 30 10 dB ease del LR Ie en ne ERES 4 8 Extra Functions u a a teen A RA eee 4 8 Filter Select Jyrin irea n Bar ieh 4 9 Clamp Couples 2 2 Sooke PEE met basic Sheet 4 9 Select Eine 24 0 9 2a E te stone EE A Se AA BO eRe 4 10 System Liner na san nass Aes aes RES bares 4 10 O Bra oc dee act eot oett pto Lebe phot tbe ace ee 4 11 Cutsor Appearance s o anal a ae 4 11 Cursor Status Tanesc 23s a Lets tbt ete tat ct ade ols 4 11 Moving Cursors Lock Left Lock Right Center Left and Center Right 4 12 Using Cursors to Measure Timing 0 0 eee ee 4 12 Using Cursors to Measure Frequency 0 cee eee teens 4 14 Using Cursors to Measure Amplitude 0 00 0 eee eee eee 4 15 Section 5 Vector Mode Introductioti zu eat Lern Ran ieee ooo ea fees A ea 5 1 Display as se a ee Be 5 1 Control Knob ar a a RAs Dee ee ee tne eh 5 2 Men a ta Eee 5 2 Select Eine san do Ce Sa cite eh ne S iste DEN De OI 5 4 ii VM700A Option 01 NTSC amp Option 11 PAL User Manual Contents Section 6 Measure Mode Measure Mode Menu Operation 0 0 0 0 c eee n 6 1 Video Option Measurement Menu Operation 0 00 0 c eee 6 2 Section 7 Picture Mode Section 8 Auto Mode Introduction 34 2 Here rain 8 1 Display eonun cese IE Sons AR trm fe 8 1 Measurement Identification sleleeeeeeee e
25. the Menu button Select Line which describes the operation of the digital line selection feature Figure 4 1 shows a typical Waveform display Refer to this figure as you read the descriptions that follow The VM700A Waveform mode can present a real time Waveform display with 25 updates per second when half a video line or less is displayed With a greater number of lines a very full display or a display of VITS on the first field in a frame the display is slowed slightly from real time For NTSC the VM700A may display any part of the two frames of two fields each Select the frame displayed by selecting Field 1 or Field 2 for frame 1 or Field 3 or Field 4 for frame 2 The default display is both frames Use the Select Line menu discussed later in this section to move to the desired field within a frame For PAL the VM700A may display any part of the four frames of an eight field color sequence You can select which frames are displayed in the Select Line menu the default is all four frames displayed There is no implicit field selection Again use the Select Line menu discussed later in this section to move to the desired field within a frame The Waveform mode graticule scale tracks as the waveform expands contracts or moves in both the horizontal and vertical directions This ensures the graticule scale is always calibrated regardless of the gain expansion factor VM700A Option 01 NTSC amp Option 11 PAL User Manu
26. the line that will be displayed when switching between the manual modes Waveform Picture Measure and Vector mode when System Line is selected Horizontal Reference The horizontal reference line is a stationary line across the display provided for Line checking and comparing signal levels It also provides a reference for measuring amplitudes in Cursors mode and can be used to get a quick measure of tilt on a bar top Status Lines The lines of text directly below the horizontal graticule scale are referred to as the status lines The first line of text displays the units for the horizontal graticule scale microseconds or nanoseconds This line also indicates when the VM700A is performing self calibration The second line gives the APL Average Picture Level and the on off status of Precision mode and Sound In Sync PAL only The third line shows the television standard in use the type of Filtering in effect or No Filtering if none is in effect the method of sampling in use Synchronous Asynchronous and the selected Sync source The fourth line describes the clamping status and which frames are currently selected Two additional lines appear with cursors showing the cursor measurements Any menu called up will appear below the status lines and will cause the status lines to move upward to make room for the menu selections Control Knob The control knob is used with the toggling Move Expand and Vertical Horizontal buttons to control wave
27. the selected parameter box to return the control knob to its scrolling function Note that setting a pair of limits backward setting an upper limit lower than its lower limit will always display an error flag on the Auto mode display Alarm Limits may be set inside Caution Limits but then only Alarm Limit violations will be flagged The limit file used by Auto mode is designated in the configuration file Channel A B C Configuration for each channel A file from the Selected Measurements directory is used in conjunction with a file from the Auto Limit Files directory to provide Auto mode with a list of desired measurements and limits for those measurements You can specify the zero carrier pulse location and or whether or not you wish to use it as a reference and define the locations of test signals on VITS lines or in a full field signal within a file in the Measurement Locations directory The files found in this directory contain information used by both Auto and Measure modes The measurement locations file used by Auto and Measure modes is designated in the configuration file Channel A B C Configuration for each channel The System Default file is the only file available for selection when the instrument is shipped Any additional files you create to customize your applications will be available for selection The files used to designate which subset of measurements you wish Auto mode to perform are found in the Selected Measurem
28. the source button approximately one second until the instrument beeps When a source is inverted the LED on the source button blinks To invert a second source and add it to another press and hold the normal non inverted source and while holding it quickly press and release the inverted source The LED on the inverted source will flash In Waveform and Vector modes an inverted source can be the sole input or it can be added to another input In Measure mode an inverted source can only be added to another source Average The Average button enables noise reduction averaging on the signal in Waveform Vector and Measure modes The amount of noise reduction up to 30 10 dB is set with the Noise soft keys The number of averages up to 256 is set with the Average Num soft keys The third row down in the keypad contains support functions Menu Help Configure Function and Copy All of these functions except Copy are toggled VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 2 Installation and Operation on and off either by pressing the button twice that is press once to turn on press again to turn off or by selecting a different operational mode in the top row except Help which must be pressed a second time to turn it off Menu The Menu button displays a menu of soft keys on screen In some cases touching a soft key displays a submenu of additional soft keys when it is selected Help The Help b
29. 5 Riser Chroma Amplitude 3 19 A Abort diagnostics 9 9 Accept Input softkey 3 8 alarm limits 3 14 amplitude reference markers 4 11 Apple LaserWriter 2 10 ASCII Printer 2 11 Auto Alarm Limit 8 1 Caution Limit 8 1 Comments Column 8 1 logging 8 2 Measurement Identification 8 1 Timed Events 8 2 Violated Limits Indication 8 1 Violated Limits Logging 8 2 Auto Limit File lines 3 14 title 3 14 Auto Limits File 3 13 Auto Mode Configuration 8 2 Auto mode display 8 1 Auto Sync Source 3 13 Auto_Limit Files 8 3 Auto_Limit Files directory 3 14 Average 2 4 5 2 Bandwidth 2 6 Baud Rate 3 16 Bypassing Power Up Diagnostics 9 8 C calendar and clock 3 9 Cancel Copy 3 2 Cancel Copy soft key 3 8 VM700A Option 01 NTSC amp Option 11 PAL User Manual Carrier Detect 3 17 Changing a Caution limit 8 3 Changing a File Parameter 3 8 changing a port configuration parameter 3 17 changing a port or format assignment 3 16 Changing an Alarm limit 8 3 Character Size 3 16 Clamp Couple 4 9 Clamp Fast 4 9 Clamp Slow 4 9 Communication Setup file 2 7 3 15 Configure button 2 5 3 1 Configure Files 3 2 Configure Files directory 2 7 Configuring the VM700A configuration 3 1 Connecting Printers 2 9 consecutive alarms 3 14 Console File 9 15 Control Knob 2 5 4 3 Control port 3 15 Copy button 2 5 Copy Port 3 8 Copy port 3 15 Creating and Deleting Files 3 5 Cursor Appearance 4 11 Cur
30. Acquisitions Sample Dropping Mode Checks Runs long acquisitions to verify interaction of the Controller and the Acquisition state machines Uses Controller state machine to toggle offset level a dynamic setting on the Analog Input board while a long acquisition runs Analyzes the acquired data to detect missing samples Output latches in all zeros all ones normal and overflow bit modes and checks the ADC output by running an acquisition and scanning acquired data The overflow bit test generates a drive level to overrange the board then acquires data and checks to verify that the board s overrange bit was set Bit Patterns DC Paths Generates a calibration DAC drive level that produces an ADC level corresponding to the bit pattern shown in the individual test The diagnostic runs a long acquisition and searches the acquired data for the individual test s bit pattern Calibrates the DVM to the standard gating patterns for both TV standards and the gating pattern that enables the DVM for all video lines using a precise 1 000 volt reference and ground Checks that a nominal DC voltage can be routed through each input channel to the ADC Gain Control Checks gain control range and bit weights Calibration DAC Offset Control Input Selection Checks the range and bit weights of the calibration DAC Checks the range and bit weights of the offset control DAC
31. Advanced Test Equipment Rentals A ished 1981 www atecorp com 800 404 ATEC 2832 User Manual Tektronix Pi VM700A Video Measurement Set Option 01 NTSC amp Option 11 PAL 070 8166 05 User Manual Tektronix P VM700A Video Measurement Set Option 01 NTSC amp Option 11 PAL 070 8166 05 This document supports firmware version 2 09 01 Copyright 1992 1993 Tektronix Inc Beaverton Oregon Printed in the United States of America All Rights Reserved Contents of this publication may not be reproduced in any form without the written permission of Tektronix Inc Specification and price change privileges are reserved This instrument in whole or in part may be protected by one or more U S or foreign patents or patent applications Information provided upon request by Tektronix Inc P O Box 1000 Wilsonville Oregon 97070 1000 Tektronix and Tek and are registered trademarks of Tektronix Inc IBM AT and IBM XT are registered trademarks of International Business Machines Inc Epson is a registered trademark of Epson Inc HP LaserJet HP ThinkJet and HP DeskJet are registered trademarks of Hewlett Packard Inc Apple LaserWriter is a registered trademark of Apple Computer Inc Mention of third party products is as an example of a type of equipment that a user might employ and is not an endorsement for that product WARRANTY Tektronix warrants that this product that it manufactures and sells will be free fr
32. CALLY continues in XX seconds then counts down from 60 seconds The procedure continues when the count down is complete or when a response from the user is detected in the form of a front panel button press or the toggling of a CPU mode switch see below The VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 9 Diagnostics first line of the message Press any Front Panel Button only appears if the VM700A has passed enough tests that the front panel buttons are operative CAUTION The following procedure involves opening the instrument cabinet to access internal switches It should be performed only by a qualified service person If the front panel buttons do not operate you can use the following procedure to allow the VM700A to continue powering up 1 Switch the VM700A power off 2 Remove the VM700A from the equipment rack if rack mounted 3 Remove the two screws from the rear panel that retain the left side cover as viewed from the front of the instrument 4 Slide the left side cover about two thirds of the way back 5 On the A5 CPU board the bottom board locate the six section DIP switch with the markings FACIMODE printed on the circuit board in front of it 6 Power the VM700A back on 7 When the error message is displayed click any of the three switches above the word MODE the three closest to the front of the instrument up then back down to continue After foll
33. Diagnostic ADC Diagnostic AnalogInput Diagnostic FilterBoard Diagnostic GPIB Diagnostic AudioProcessor Diagnostic AudioAnalog Diagnostic Selected Line 6 Not Selected See Section 9 Diagnostics for more information on using and controlling the diagnostic choices The Measure_Limit Files directory contains limit information for Measure mode manual measurements The limits in these files perform two functions 1 They place graphic limit markers on the screen in measurements where applicable and 2 They appear on printouts from the Measurement Results directory when the measurement exceeds the limits The measurement limits file used by Measure mode is designated in the active file in the Video_Source Files directory The file s in the Measurement Locations directory contain information used by both Auto and Measure modes The measurement locations file for each channel is designated in the active file in the Video_Source Files directory For PAL the SIS Present parameter tells the VM700A whether Sound in Sync is present yes or absent no When SIS Present is yes measurements are made using Synchronous sampling The Measure mode parameter determines whether manual measurements are made with Asynchronous the default or Synchronous sampling NOTE Measure mode manual measurements normally use Asynchronous sampling Auto measurements always use Synchronous sampling Synchronous sampling is
34. M Runs a checkerboard pattern test on the trigger RAM Tests state machine sequence RAM Fills RAM with psuedo random sequence then reads and verifies it Checks that data moves through the FIFO without overflow even with processor bus contentions Load Looping Optional Hardware VM700A Option 01 NTSC amp Option 11 PAL User Manual Checks that acquisition state machine can be programmed to write the contents of temporary store into acquisition memory locations and that it can process acquisition program GOTO instructions Pass indicates hardware present and working NA indicates hardware not available 9 3 Section 9 Diagnostics Table 9 2 Individual Diagnostics Cont Board Tested Acquisition cont ADC Successful completion of these tests requires that Genlock A2 Controller A8 and Acquisition A7 boards be operating correctly Tests involving the Calibra tion DAC require that the Analog Input A1 board be operating correctly Analog Input Successful completion of these tests requires that Genlock A2 Controller A8 and Acquisition A7 boards be operating correctly 9 4 Test Name External Triggers Description Checks that Controller trigger RAM can be used to recognize when certain bits in the ADC data stream are set Causes signal interrupts that are counted by the Controller s Sig0 Sigl Sig2 counters Long
35. M NVRAM Probe Board Type Determines type of board Possible board types are 1 5 Board Type 3 0 6 0 or 12 0 Mbyte Information contained in each Parts in Set EPROM determines quantity of EPROMs on the board Total CRC Check Runs 32 bit CRC check on ROM space and compares the result with a CRC stored in the CPU board s NVRAM PartCRC Check Runs only if total CRC check fails This test runs a 16 bit CRC check of each EPROM on the board Test also checks for correct part location on board Total CRC Store Runs only if total CRC check fails If total CRC check fails but part CRC check passes this test computes a 32 bit CRC based on the results of the 16 bit CRCs for each PROM and stores it in the CPU board s NVRAM a Contents of RAM are copied to main system RAM before the test runs This preserves the contents of RAM If main system RAM is bad the test returns indicating it did not run 9 2 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 9 Diagnostics Individual Diagnostics Table 9 2 lists and describes the VM700A individual diagnostics Table 9 2 Individual Diagnostics Board Tested Genlock Successful completion of these tests requires that the Controller A8 be operating correctly Controller Acquisition Successful completion of these tests requires that Genlock A2 and Controller A8 boards be operating correctly Test Name Status Checks NTSC or PAL VCO Lock Control
36. None 3 Ifa function is to execute a screen copy make sure that the Copy Port in the Communication Setup file has a value other than None To Delete a Timed Events File 1 Press the Configure button Touch the Configure Files soft key Touch the icon for Timed Events Touch the Delete File soft key Uic ume tu ibl Touch the icon containing the name of the file you wish to delete The icon of the selected file disintegrates over a period of five seconds To stop file deletion touch the screen anywhere inside the directory window before the disintegration completes Stopping the disintegration part way through has no effect on the file To Add a Report or Function to a Timed Events File Touch the icon of the file to display it for editing if it is not displayed already With the file opened turn the knob so that the insertion point of the file is highlighted touch either the Enter Report or Enter Function soft key as required The VM700A inserts a copy of the selected type above the highlighted line That may then be edited for the new event or function to be timed VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 23 Section 3 Configuring the VM700A To Remove an Event From a Timed Events File Touch the icon of the file to display it for editing if it is not displayed already turn the knob to highlight the line you wish to delete press the Delete Line soft key To Edit an Event in a Tim
37. ON OFF switch and Line Selector 2 2 Instruments are shipped with the power cord required for the country of destination Available power cord option information is given in Section 1 Introduction and Specification of this manual Contact your Tektronix represen tative or local Tektronix field office for additional power cord information Calibrating the Touch The VM700A is shipped from the factory with its touch screen fully calibrated Screen Although it will seldom be necessary the touch screen can easily be recalibrated To calibrate the touch screen m Switch off power to the VM700A at the front panel m Press and hold the Configure button and switch the power back on VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 2 Installation and Operation Front Panel Operation After about three seconds the VM700A displays the touch screen calibration display Full instructions for calibration are given on the screen A small circle with a dot 1 pixel is lit in each corner one corner at a time top left top right bottom left bottom right Hold your finger on the touch screen directly over the dot until the VM700A beeps and lights the dot in the next corner When the calibration is completed the VM700A finishes the power up sequence then the Waveform mode display appears The VM700A front panel Figure 2 2 consists of a touch screen and a 20 button keypad with a control knob
38. Stop File Printing Press the Configure button twice Touch the Cancel Copy soft key This soft key only appears when the Copy button LED is flashing Touching this soft key cancels printouts in progress and deletes all files queued for printing including printouts generated by pressing the Copy button or the Print File soft key To View the Contents of the Spooler From the main Configure directory touch Leave Directory twice to move to the top directory window Select the Spooler directory If any copies are pending they will appear as numbered files VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A Touch the icon representing the file to view it on the display The file cannot be edited but can be scrolled through using the control knob Setting the Internal Clock The Time function allows you to set the VM700A internal calendar and clock shown in Figure 3 3 to the current time and date The time and date are placed on all printouts generated by the VM700A Perform any or all the following steps to enter the correct time and date into your VM700A MO Aug 07 17 44 58 1995 S ay gt ron zn j Load Time Second 17 44 45 1995 Month Date Aug 07 Hour Minute Year Figure 3 3 Time Configure menu To Set the Time and Date Select touch the Time soft key to display the VM700A calendar and clock The clock continues t
39. Summary Please take a moment to review these safety precautions They are provided for your protection and to prevent damage to the product This safety information applies to all operators Symbols and Terms These two terms appear in manuals statements identify conditions or practices that could result in damage to the equipment or other property m statements identify conditions or practices that could result in personal injury or loss of life These two terms appear on equipment m CAUTION indicates a personal injury hazard not immediately accessible as one reads the marking or a hazard to property including the equipment itself m DANGER indicates a personal injury hazard immediately accessible as one reads the mark ing This symbol appears in manuals Static S ensitive De vices These symbols appear on equipment Y A DANGER Protective ground ATTENTION High Voltage earth terminal Referto manual Specific Precautions Power Source This product is intended to operate from a power source that applies no more than 250 V ms between the supply conductors or between either supply conductor and ground A protective ground connection through the grounding conductor in the power cord is essential for safe system operation VM700A Option 01 NTSC amp Option 11 PAL User Manual vii Safety Summary Grounding the Product This product is grounded through the power cord To avoid electric shock plu
40. TSC amp Option 11 PAL User Manual section 3 Configuring the VM700A Section 3 Configuring the VM700A The Configure button brings up a display shown in Figure 3 1 that provides access to utilities that allow you to edit files that control many aspects of the VM700A operating environment and information on the firmware installed in your instrument This section describes the use of these utilities The VM700A gets important operating information from configuration files stored in its non volatile memory These files are arranged in a directory structure accessed using the front panel Configure button and the touch screen menu choice These files control such areas of VM700A operation as Which measurements are performed in Auto mode What measurement limits should be in effect for Auto mode measurements for example what values should be used as upper and lower bounds before a caution or alarm is triggered The timing of Auto mode reports and timed functions Which line s each Auto or Measure mode measurement will be made on and where applicable at what position within the line s Which output ports to send printouts screen dumps periodic reports or error logs to and in what formats used 51 Non volatile memory used 133694 bytes free 128460 bytes free 49 VM700A Video Measurement Set XXxXXX XXXX Option 01 NTSC Version 2 08 Option 11 PAL Version 2 08 Option 40 Audio Version 1
41. The higher the noise reduction requested the longer it takes to settle 75 Bar Cal Rotating the knob in Vector mode changes the gain or phase angle which can leave the VM700A uncalibrated for angle or amplitude Touching this softkey returns Vector mode to a default calibrated state with phase angle set to 0 0 degrees gain to 1 000 0 0 dB VM700A Option 01 NTSC amp Option 11 PAL User Manual 5 3 Section 5 Vector Mode 5 4 Select Line In the Vector mode pressing the Select Line button changes the control knob function to digital line select and displays the following menu Field Toggle displays the system line in the other field For PAL if the current line is between 1 and 313 it adds 313 if the current line is between 314 and 625 it subtracts 313 Find Colorbars searches from the system line through the frame for a line containing color bars and displays it if found Vector Line when highlighted changes the Vector mode line independently of the system line Field n Line nn NTSC Line n PAL displays the line specified by the softkey To change the line number select and hold the softkey to be changed turn the knob until the new line number is found and release the softkey VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 6 Measure Mode Section 6 Measure Mode Pressing the Measure button on the front panel puts the VM700A into Measure mode In this mode the VM700A provides in
42. Video Measurement Set Those features that generally apply across the full range of possible options are explained For specific information on the installed options see the applicable option manual supplied with this manual set The VM700A operator s documentation now comprises the following manuals VM700A Video Measurement Set Operator Manual VM700A Programmer Reference Manual Option 01 NTSC Measurements Operator Manual Option 11 PAL Measurements Operator Manual Option 1G Echo and Rounding Error Measurements Operator Manual Option 20 Teletext Measurements Operator Manual Option 21 Camera Measurements Operator Manual Option 22 Video Wander Measurements User Manual Option 30 Component Measurements Operator Manual Option 40 41 42 Audio Measurements Operator Manual Option 48 GPIB Interface Programmer Manual Your manual set includes the VM700A Video Measurement Set Operator Manual the VM700A Programmer Reference Manual and the applicable option manuals for your instrument Some additional software packages that may be of special interest to you are VMBKUP Software to assist in backing up the VM700A user created files These files can be reloaded to the same instrument or to another VM700A to generate a common set of configuration files VMRMGR This software aids you in handling the graphic displays and transferring them to a personal computer for filing display or printing VMTerminal This useful software package assists in remote cont
43. al 4 1 Section 4 Waveform Mode Vertical Scale Units y N Volts IRE FLT a Vertical Graticule Units Horizontal Reference Line Field Line Readout L16 Horizontal Graticule Scale Kaas EN NEIGE zz Buzz ze Be 10 0 20 0 30 0 40 0 50 0 60 0 Noise reduction RESET MicroSeconds Horizontal Scale Units APL 50 3 Precision Mode Off 525 line NTSC No Filtering Synchronous Sync Source Status Slow clamp to 0 00 V at 6 63 uS Frames selected 1 2 Lines Figure 4 1 Typical NTSC Waveform display The Waveform mode vertical graticule scale is in mV or Volts depending on the vertical gain setting The horizontal graticule scale is calibrated in us microseconds or ns nanosec onds as appropriate for the horizontal gain setting The horizontal scale units indication is centered in the topmost status line just below the horizontal scale Line Identification A readout of the displayed line number is always shown If a single line or a fraction of a line of video is displayed the readout is located just above the horizontal graticule scale and somewhere to the right of the vertical scale wherever it fits best If more than one line is displayed the indicator is found to the right of sync tip for each line VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 4 Waveform Mode When multiple lines are displayed the leftmost line number is the system line The system line is
44. al Vertical button In Expand mode the normal expansion horizontal or vertical depending on the arrow button selection is around the center of the display A specific point for expansion is selected by touching the screen at the expansion point wanted Expansion or contraction is around the touched point while the screen is touched It reverts to the center of the screen when your finger is removed from the touch screen Select Line The Select Line button assigns the function of the control knob to video signal line selection The LED in the Select Line button is on when Select Line is active To scroll through the field line by line press the Select Line button and rotate the control knob Depending on the operational mode a menu of soft keys may also appear The Select Line soft keys and the specific control knob functions are described in the relevant sections of this manual VM700A Option 01 NTSC amp Option 11 PAL User Manual 2 5 Section 2 Installation and Operation Equipment Signal Sources 2 6 Required Bandwidth Connecting Inputs and Outputs Display and Graticule Intensity Control To change the intensity of the display or the graticule hold down the Display or Graticule button and rotate the control knob Most VM700A measurements can only be done using either off air live signals or signals from a generator that have the appropriate test signals in the vertical interval Without the correct signal being app
45. al diagnostics running at power up touch the Abort softkey when the diagnostic is running The VM700A proceeds to the next diagnostic selected in the Diagnostics Selection file If you abort the last selected diag nostic the VM700A proceeds with system initialization Individual Diagnostics and Measurements Running Individual Diagnostics and Measurements Individual diagnostics and diagnostic measurements can be run at any time To run an individual diagnostic or measurement Press the Measure button 2 Touch the Diags softkey if the diagnostics directory is not already displayed 3 Touch the icon of the diagnostic or measurement you want to run Diagnostic measurements simply display the value of the item they are measuring until you press a front panel button Individual diagnostics however have a few more options When running individual diagnostics behave as follows 1 The display shows the name of the diagnostic the message SELECT RUN MODE and two soft keys labeled PowerUp Mode and Interactive Mode 2 Touching PowerUp Mode runs the diagnostic in the same way as if the machine were powering up There is no user interaction and each line written to the display summarizes the results of a group of tests A softkey appears at the bottom of the display to allow you to change the Run mode while the diagnostic is running if you so choose When the diagnostic is complete the SELECT RUN MODE screen appears again Press the
46. ames on the left hand side of the Identification display Each name is followed by the measurement result and a notation of the measurement s reference where applicable Violated Limits Indication When the user definable limits are violated the violated limits are printed on the screen and an indicator appears between the measurement result readout and the Violated Limits Lower column If the indicator is a single asterisk a Caution Limit has been violated If the indicator is a double asterisk an Alarm Limit has been violated If a measurement cannot be made for some reason the result readout is replaced with a line of dashes and is considered a limit violation Setting the Caution and Alarm Limits is discussed later in this section VM700A Option 01 NTSC amp Option 11 PAL User Manual 8 1 Section 8 Auto Mode Comments Column Timed Events Violated Limits Logging Remote Operation Beyond the Violated Limits columns Auto mode prints messages primarily for measurements that cannot be performed The comment describes the nature of the problem the VM700A has in making the measurement to assist you in rectifying the problem If the measurement is one that will not normally be available from the signal being measured a new Selected Measurement file can be created to customize the measurements list to those of interest in your application Auto mode has a utility for generating reports of specifi
47. anual Consult either of those manuals for more information about individual measurements Measurement provided with additional installed options are described in the manuals supplied for the options When the Picture front panel button is pressed the VM700A functions as a low resolution picture monitor This display is to assist you in identifying the input source for other operational modes Picture mode operation is described in Section 7 When the Auto front panel button is pressed the VM700A cycles through the selected set of automated measurements A general description of Auto mode operation is given in Section 8 Detailed information about individual auto mode measurements is included in the VM700A Option 01 NTSC Measurements Operator Manual and the VM700A Option 11 PAL Measure ments Operator Manual Consult either of those manuals for more information about individual measurements The VM700A features a large set of diagnostics to allow you to verify that the instrument is operating properly as well as to localize malfunctions if they occur Diagnostics are described in Section 9 The VM700A features the ability to record sequences of operations functions and execute them by touching a soft key on the front panel See the VM700A Programmer Reference Manual for details on how to record edit and execute functions The functions can also be called remotely once they have been created The VM700A is capable of being remotely contr
48. anual 3 19 Section 3 Configuring the VM700A 3 20 Selected Measurements Directory To Enable or Reset the Password Function Turn off the VM700A and remove the holding screws for the left side panel Slide the left side cover of the VM700A back to expose the 6 section DIP switch on the A5 circuit board To enable Password set position 3 from the front of the DIP switch UP When power is turned on again the Password function is enabled and you can set a password using the procedure given previously To either reset the password if it should become unknown for some reason or disable the function set position 3 of the DIP switch DOWN turn on the VM700A and let it complete its power up routine The Password function is now disabled and the unknown password is visible in the Password file and may be edited To re enable Password turn off the VM700A and set position 3 of the DIP switch UP Close the side panel and replace the holding screws for the panel To Change the Current Password Select touch the Password file icon Type in the current password and press Done or Return Touch the current password Type in the new password up to 15 characters Press Return or Done and select the Update amp Exit soft key to put the new password into effect or press Cancel or No Change amp Exit to keep the old password When the Password function is first enabled the default password is null no password is needed to Update
49. available for manual measurements in the case of very noisy signals negative going pulses or other conditions that prevent using Asynchronous sampling However Synchronous sampling cannot be used to measure VCR VTR devices The Line parameter contains the default line on which the measurement is made The Line value is used in the Default Line Sel soft key in the Select Line menu in Measure mode For PAL the Time offset from leading edge of sync parameter defines the actual measurement position The numeric Line values and Time VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A values can be changed by highlighting the desired line and selecting the parameter you want to change Rotate the control knob to obtain the new value then select the Accept Input soft key or touch the screen anywhere inside the directory window Finish by selecting the Update amp Exit soft key For PAL two of the measurement descriptors can also be modified The 20T value on the Modulated Pulse F HAD line can be changed to 10T by selecting the parameter and rotating the control knob The 40 value of the 5 Riser Chroma Amplitude line can be changed to 20 by selecting the parameter and rotating the control knob Measurement Results Files are written into the Measurement Results directory Directory when you exit a measurement in Measure mode when you exit Auto mode assuming that Auto mode has had time
50. aveform menu Select Line always disables the Move Expand function of the control knob but does not disable the Display and Graticule Intensity control functions Changing the displayed line in Waveform mode or any of the manual modes Waveform Vector Picture and Measure changes the current line for all the manual modes This line is referred to as the system line The leftmost line number on the display is the system line However both Vector mode and Measure mode can operate independently of the system line In Vector mode you can select an independent Vector Line found in the Select Line menu in Vector mode See Section 5 for more information on the Vector Line In individual measurements the Default Line Sel soft key changes the displayed line to the measurement line specified in the Measurement Locations file VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 4 Waveform Mode Cursors The VM700A provides a set of cursors that enable you to make custom measurements manually with a high degree of accuracy You can use the cursors to Measure time duration Measure frequency Measure luminance or chrominance amplitudes Measure rise or fall times Toggle quickly between any two points in a frame Primarily cursors are used to make measurements not automatically made in Auto mode or Measure mode They can also be used to verify some of the automated measurements should the need arise The accuracy
51. chwetzervischer Elektrotechischer Versin UL Underwriters Laboratories Inc 2A 6 A type C fuse is also installed inside the plug of the Option A2 power cord 1 4 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 2 Installation and Operation Section 2 Installation and Operation Power Requirements A Changing Line Voltage Range and Fuse A Power Cord The VM700A operates with line frequencies from 48 Hz to 66 Hz over two line voltage ranges The nominal setting of the low voltage range is 115 VAC The nominal setting of the high voltage range is 230 VAC There are two power switches on the VM700A one on the rear panel above the power cord receptacle and one on the front panel Both must be on to operate the instrument The rear panel switch is the master power switch The switch on the front panel remotely enables the voltage supply outputs WARNING Dangerous voltages are present within the Power Supply module when the rear panel power switch is on regardless of the position of the front panel power switch Do not operate the VM700A with any covers removed Refer all servicing of the instrument to a qualified service person The voltage range selection switch and fuse holder are located in the lower left corner of the rear panel see Figure 2 1 The VM700A is shipped from the factory set for the operating voltage of the destination nation 115 VAC or 230 VAC If the setting is not correct it
52. ctory the path line would read In nvram0 ConfigFiles Measure_Limit Files This indicates that the path from the root of the directory structure designated by the initial goes through directory nvramo0 then through a subdirectory of nvramO named ConfigFiles to the current directory which is a sub directory of ConfigFiles named Measure_Limit Files When editing a limits file for the Measure mode named User s_Measure Limits_File the path line would read Editing User s_Measure Limits_File The tilde in a directory or file name represents a carriage return and is used to join the first and second lines of directory function key or file names VM700A Video Measurement Sets equipped with both Option 01 NTSC and Option 11 PAL dual standard provide a soft key labeled Switch NTSC PAL in many of the Configure mode menus Touching this key toggles between the NTSC and PAL configuration file structures A read out below the directory window indicates which standard NTSC or PAL files you are currently viewing or editing 3 4 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A Supplied Directories All the directories and most of the files supplied with the VM700A are read and Files only they cannot be edited renamed or deleted However files can be copied to create new editable files Only files that you have created can be renamed or deleted Supplied r
53. d be wired as described in Table 2 3 The cable must have a female DB 25 connector on the VM700A end and a male DB 25 connector on the LaserWriter end Table 2 3 Apple LaserWriter Connections Male DB 25 Connector Pin Number Female DB 25 Connector Pin Number Apple LaserWriter end VM700A end 1 shield GND 1 shield GND 3 RXD 2 TXD 2 TXD 3 RXD 5 CTS 4 RTS 4 RTS 5 CTS 1 signal GND 1 signal GND Connecting an HP LaserJet HP ThinkJet or HP DeskJet Setting Up the VM700A In Configure mode set the Copy Format Report Format and Log Format in the Communication Setup file to HP LaserJet HP DeskJet or 2 10 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 2 Installation and Operation HP ThinkJet as appropriate for your printer plotter Set the Copy Port and Report Port to Serial Port 0 or Serial Port 1 as needed for your application For the selected port set the Baud Rate to any value from 300 to 19200 9600 is recommended set Protocol to None Flow Control to XON XOFF Reset Character to None Parity to None Character Size to 8 and Carrier Detect to Disabled Setting up the HP LaserJet ThinkJet or DeskJet Set the baud rate to the same as the VM700A Refer to the appropriate user manual for the printer setups Connect the serial printer cable between the VM700A and the printer An optional accessory cable is available from Tektronix The part number for that cab
54. e the default function of the control knob is to vary the display phase Angle the Move LED is on As a phase shifter the control knob rotates the display in one tenth degree increments as indicated by the Angle deg readout in the upper right corner of the display Expand Gain Range When the Expand button is pressed the control knob becomes a calibrated vector Gain control Expand is also temporarily selected when the screen is touched inside or near the graticule The Gain readout in the upper right corner of the display indicates the current Gain setting with a multiplier x and in dB The default Vector Gain is x1 000 0 000 dB and can be compressed or expanded from x0 250 12 195 dB to x50 000 34 055 dB in 0 023 dB increments Display and Graticule Intensity Display and graticule intensity adjustments are also made with the control knob While the Display button is held in the control knob varies the intensity of the vector menu information and any other text on the display not associated with the graticule While the Graticule button is held in the control knob varies only the intensity of the graticule Pressing the Menu button either displays the Vector menu or toggles it off if it is already displayed The Vector Menu is shown in Figure 5 2 V Axis Switch PAL only inverts the vector around the V axis for a line with a V axis burst It has no effect on lines with a V axis burst Display Select V PAL on
55. e 8 1 Violated Limits Indication ooooooooooorrcoro e 8 1 Gommnients Col mn sarre eta E AE ae edente vues eg Reda 8 2 LME EYents botte eT ct eae a ls ERU Qe Ub RA erae 8 2 Violated Limits Logging o ooooooooooorrrr II 8 2 Remote Operation cette eben rn EET Re Gad CAE eS 8 2 Configuring Auto Mode zu Wa eee bas RURSUS Rt Be oY ROG Ss HAN eS aes NEN RETE 8 2 Defining Measurement Locations 0 0 0 cee eee teens 8 4 Selecting a Group of Measurements 0 0 cece cece eee eee 8 4 Setting Event Times s salo et e E IRE ee eh iad ete ess 8 5 Section 9 Diagnostics Introduction o seen e Ie ehe EP EV a 9 1 Low Level Diagnostics ree ass oe IRR SS WORE AE RENE MSS 9 1 Individual Diagnostics un cn sh ee eb obi alee Maat ann hades NaN gu ste 9 3 Diagnostic Measurements o eesotsa a a eee eee aa 9 6 Power Up Diagnostics nn a E ee Pee wee 9 6 Power Up Diagnostic Errors oooooooococco Ie 9 6 Individual Diagnostics 5o A Soe be ke E ERR ene 9 7 Bypassing Power Up Diagnostics 0 0 eee III 9 8 Individual Diagnostics and Measurements 0 00 00 eee cee eh 9 9 Running Individual Diagnostics and Measurements 00 0000 e eee eee eee 9 9 Di gsloop u seth an ee Ge ets ee Cas edes Vah esee 9 10 Running Diagnostics Remotely 0 00 eee ccc cence eee eens 9 10 Connecting a Terminal or PC zer se AR Ries here 9 10 Entering Debug Mode sumaria ker RE RR bees Bin et Samet b
56. e example Source_Selection Video file the VM700A reads the file named tx1 in the Video_Source Files directory for parameter information when Channel A is selected the file tx2 when Channel B is selected and the file studiol when Channel C is selected The occurrence of VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A timed events periodically scheduled reports and functions is determined by the contents of file My_Events in the Timed Events subdirectory When the VM700A is shipped all three channel parameters and the Timed Events parameter are set to System Default For a dual standard VM700A those equipped with both Option 01 NTSC and Option 11 PAL the Source Selection Video file is a little different For each channel it indicates the current standard in effect along with a separate file from the Video Source Files directory for each of NTSC and PAL When the NTSC standard is in effect the file listed under the NTSC column is used when the PAL standard is in effect the file listed under the PAL standard is used To change the standard in effect for a channel rotate the control knob until that channel s line is highlighted intensified then select the entry under the Video Std column by touching it Rotate the control knob until the desired standard appears Touch the Update amp Exit soft key to enter the change into the file In Figure 3 4
57. e nod cece eee 3 5 Editing Files eet A AS an ae A aig A bte san 3 6 Printing Piles serait vuU RUE Pei EAE 3 8 Setting the Internal Clock 0 0 III 3 9 Directory Structure cia e RR ERE ee Veen gr REM es S 3 10 Source Selection Video File pescari re perac ieoa ee o i e 3 10 Video_Source Files Directory 2 0 0 0 cece eee cnet een en eee 3 13 VM700A Option 01 NTSC amp Option 11 PAL User Manual i Contents Auto Limit Files Directory 0 0 0 cece cnet teen beeen 3 14 Communication Setup File 0 e hee 3 15 Diagnostic Errors File ee cen ence enn m mere 3 17 Diagnostics Selection File 0 0 0 cece ee mee 3 17 Measure Limit Files Directory 0 0 cece cent e 3 18 Measurement Locations Directory 0 0 c eee eet eee nen ence 3 18 Measurement Results Directory 20 cece ee hee 3 19 Selected Measurements Directory 0 0 cece nett he 3 20 Video Source Identification File 0 0 cece een e 3 25 Section 4 Waveform Mode Introduction k iie eo Reed kr en aan HSA wee aa eee AUR S 4 1 Display 2 82 Ae ee a tr e Eb rA 4 1 Wav efori sss ceri ss acts ueber ben M ee a 4 1 Gratic le ocu eset per release rare 4 1 Line Identification cei hee db A Se ed 4 2 Horizontal Reference Line 0 cece hh mee 4 3 STATUS LANES MR m 4 3 Control Knob Iii it Ra er BE RAR Aa Aa aa ne ates ee 4 3 Breeze ns ee eel a oak UBI IURIS 4 4 A A a a a a a a a n a
58. ead only files can be viewed by selecting them which displays the file contents All read only files are stored in ROM while all editable files are stored in non volatile memory NVRAM Six files supplied with the VM700A can be edited without first copying them Five of these are in the main Configure Files directory Communication Setup Diagnostics Selection Password if enabled in hardware Video_Source Identification and Video Source The sixth file is the IpConfig file in the nvramO directory one level higher than the main Configure Files directory The IpConfig file contains system addresses used for remote file transfer FTP and is discussed in the VM700A Programmer s Reference Manual Creating and You create a file in the Configure Files directory by copying the contents of one Deleting Files file to another named file Since the factory installed default files are not editable you must create your own file to make a configuration change To Create a File Enter the Configure Files directory by pressing the Configure button followed by the Configure Files soft key then touch the icon corre sponding to the directory in which you want to add the new file Press the Create File soft key Doing so displays the prompt Please select a file as template at the top of the display Touch the icon corresponding to the file you want to copy This copies the contents of the selected file To allow you to name the new copy a box appears in t
59. ecution to spot the failure or if the failure is intermittent examine the contents of the Diagnostic Errors file in the nvram0 ConfigFiles directory To exit Diagsloop touch the Abort Looping softkey Running Diagnostics Remotely Connecting a Terminal or 9 10 PC Entering Debug Mode If the VM700A display is not operating or is operating improperly you will not be able to view diagnostic results The VM700A supplies a method known as Debug mode to view diagnostic results on a terminal or PC should the display be malfunctioning In Debug mode the VM700A redirects low level power up diagnostic display output to the rear panel PORT 0 serial connector by default See Section 2 Installation and Operation for information about connecting a terminal or PC to the PORT 0 connector of the VM700A In particular see the text entitled Connecting Outputs for details on the required cable wiring If you are connecting a PC to the VM700A you will also have to run a terminal emulator program in order to read the information output by the VM700A To enter Debug mode 1 Switch the VM700A power off 2 Press and hold the Help button and switch the VM700A power on 3 After about 5 seconds release the Help button The terminal now displays the same menu as when Debug mode is forced VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 9 Diagnostics CAUTION The following procedure involves opening the ins
60. ed Events File Touch the icon of the file to display it for editing if it is not displayed already Turn the knob to highlight the line you wish to edit Touch the item time channel type or file name on the line you wish to edit Turn the knob until the desired value appears Press the Accept Input soft key or touch the screen anywhere within the window You can enter a time of Undefined for an event by pressing the Enter undefined soft key when the event s time field is highlighted An event with a time of undefined is ignored This function is handy when you want to skip an event temporarily but don t want to re enter its associated values later To Create a Function for Timed Execution Press the Configure button press the Function Keys soft key press the Timed Functions icon press the Create Function soft key give the new function a name using the on screen keyboard press Done when you have finished entering the name From this point you can define a timed function The steps for defining a timed function are found in the VM700A Programmer s Reference Manual Basically creating a function is a learn mode operation that records into the named file all the front panel button presses soft key presses and delay times used to create the function Once created the Function Key file is then available for playback To Cancel a Timed Report in Progress Press the Cancel Report soft key To Cancel a Timed
61. ed measurements at specified times or for automatically executing functions at specified times The report is in the same format as the Auto mode display Configuring the report generation function execution process is discussed in detail later in this section The VM700A can be set to log print limit violations A one line report from the Auto mode display is logged any time a measurement result crosses the Alarm Limit boundary a specified consecutive number of times both when the measurement goes outside the limit or comes back within the limit Enabling Disabling Logging The automatic logging of violated limits can be enabled or disabled by setting the Serial And Printer Setup file found in Configure mode Log Port entry to Port 0 or Port 1 enabled or None disabled the default setting If Option 48 the GPIB Interface is installed the logging port may be set to GPIB The VM700A Auto mode measurements may be executed individually or as reports while in remote operation Details of making Auto mode measurements remotely are discussed in the VM700A Programmer s Reference Manual Configuring Auto Mode 8 2 Each input SOURCE channels A B and C has a file assigned to it in the Video_Source Files directory that specifies other files to use for defining measurement limits measurement signal locations and selected measurements System default files are provided that may be used as templates to create customized measurement confi
62. ene oat 9 10 Running Remote Diagnostics in Debug Mode 0 0 00 eee eee eee 9 11 Serial Port Setup for Low Level Diagnostics Debug Mode 0005 9 13 Start Up Shortc ts ci stags 22 25 sas de a ea a 9 14 Getting Technical Support Hinssen a E E a e 9 15 Console Fles 2 2 pis ege E en re el ean ee 9 15 Diagnostic Errors Flle IB E A E 9 15 Index VM700A Option 01 NTSC amp Option 11 PAL User Manual iii Contents List of Figures Figure 2 1 Rear panel fuse power connector ON OFF switch and Line Selector 2 2 Figure 2 2 VM700A front panel eee eens 2 3 Figure 2 3 VM700A rear panel 0 2 eee eect een ee 2 7 Figure 3 1 Typical main Configure menu 3 1 Figure 3 2 Configure Directory 00 0 cece cece eee cence 3 3 Figure 3 3 Time Configure menu ooo 3 9 Figure 3 4 How the VM700A gets parameter information 04 3 12 Figure 4 1 Typical NTSC Waveform display 0 20 0 cee eee eee eee eee 4 2 Figure 4 2 Waveform menu tree 4 5 Figure 4 3 Left cursor locked to 90 point of sync edge right cursor to 10 point 4 14 Figure 4 4 Color burst aligned with horizontal reference line 4 15 Figure 4 5 Cursors mode indicating color burst amplitude 0 4 16 Figure 5 1 Vector display of a color bar signal 0 0 cece eee eres 5 1 Figure 5 2 Vector mode menu 1 eee rruen urner 5 3 Figure 6
63. ent Time 8 5 Exit a File Without Change 3 8 Expand 4 3 Expand Gain Range 4 4 Expand while the screen is touched 4 4 Expansion Waveform 2 5 Expansion point 2 5 Extra Functions 4 8 Index 2 F FAIL FOUND 9 10 Field 1 or 2 Field 3 or 4 NTSC 4 10 Field n Line nn NTSC Line nn PAL 4 10 Field Toggle 4 10 file 3 4 files creating 3 5 deleting 3 6 editing a line 3 6 Editing Files 3 6 editing keyboard 3 7 rules for naming 3 5 saving changes to a file 3 8 start printing 3 8 stop printing 3 8 Filter Select 4 9 Fixed IRE NTSC Only 4 9 Flow Control 2 8 3 16 Format changing assignment 3 16 Frame 1 2 3 4 PAL 4 10 Freeze 2 4 4 4 front panel 2 3 Function button 2 5 Function Keys 3 2 Fuse 2 1 G Gain 4 8 gating widths 4 10 Getting Technical Support 9 15 Graticule 4 1 Graticule Intensity 2 6 4 4 graticule scale 4 2 H Help button 2 5 high level diagnostics 3 17 High pass Filter 4 9 Horizontal Reference Line 4 3 Individual Diagnostics 9 3 9 7 Individual Diagnostics and Measurements 9 9 inputs 2 6 Instrument Overview 1 1 VM700A Option 01 NTSC amp Option 11 PAL User Manual Index Instrument Specifications 1 3 intensity 2 6 internal calendar and clock setting 3 9 inverted source 2 4 K keyboard character set shifting 3 5 Set1 3 5 Set2 3 5 Shift key 3 5 L Leave Directory soft key 3 4 LF Noise 7 5 kHz 10 kHz 15 kHz 4 9 line
64. ents directory The files found in this directory contain a list of all the measurements Auto mode can perform The purpose of the files is to allow you to select a subset of measurements you wish to perform from the entire list of measurements available A selected measurements file is used in conjunction with an auto limit file to provide Auto mode with a list of desired measurements and the limits at which those measurements generate caution and alarm messages Note that the mnemonic of each measurement name used in remote operation is listed to the left of the measurement name The Selected Measurements system default file is the only file available for selection when the instrument is shipped Use the Create File softkey to create a new file you can customize Selecting or deselecting a particular measurement is simple After opening the desired file use the control knob to scroll the file so the desired measurement is highlighted Note that the labels Selected and Not Selected are printed below the directory window Touch the highlighted line on the Selected side of the screen VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 8 Auto Mode to select a measurement or on the Not Selected side of the screen to deselect a measurement If you wish to select a small subset of the available measurements select the Select None softkey and then make your measurement selections Touching the Select All softkey selects al
65. essed by the appropriate front panel button or softkey as needed for the application in use VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 7 Picture Mode Section 7 Picture Mode Picture mode is intended solely to assist in input source identification of TV video picture signals If non picture test signals are viewed the signal patterns will be displayed but no meaningful information may be extracted from the display Pressing the Picture button brings up a low resolution TV display with a software generated pseudo gray scale The number of the system line is always displayed and Select Line is always on A bright line indicates the position of the system line on the display You may quickly set the line selection to a visual reference point in the picture display and then switch to the waveform mode to view the contents of that line Two soft keys are available for use in adjusting the display When Picture mode is active the Display and Graticule hard keys change their action Turning the knob while holding the Display button in adjusts the picture brightness When the Graticule hardkey is held in turning the control knob adjusts the picture contrast Both brightness and contrast can be reset to their default values using the Adjust Default Brightness and Adjust Default Contrast soft keys VM700A Option 01 NTSC amp Option 11 PAL User Manual 7 1 Section 7 Picture Mode 7 2 VM700A Option 01 NTSC am
66. ffset hum and bounce effects from the signal DC Coupling selects DC coupling no clamping Duration selects 0 5 ms 0 67 ms 1 0 ms or 2 0 ms clamp gating widths Wide gating widths provide better noise immunity but signal distortions may not provide a wide enough sustained level In Waveform mode pressing the Select Line button switches the control knob to a digital line select function When either no menu or the Waveform menu is displayed pressing Select Line also displays the Select Line menu which is structured as follows Field Toggle toggles the system line to the other field for PAL 313 lines if the system line was from 1 to 313 313 lines if the system line was from 314 to 625 In freeze mode the change is limited to the acquired area Field n Line nn NTSC Line nn PAL displays the system line specified by the soft key To change the line number select and hold the soft key to be changed turn the knob until the new line number is found and release the soft key In Freeze mode the change is limited to the acquired area Field 1 or 2 Field 3 or 4 NTSC When selected default color frame 1 fields 1 or 2 or color frame 2 fields 3 or 4 are displayed Frame 1 2 3 4 PAL When selected the corresponding frame is included in the display The default is all four frames selected Although the Select Line button responds in all submenus the Select Line menu will not replace any submenus only the main W
67. fies the default frame lines and intra line positions from which to make measurements as well as other measurement related information Selected Measurements File the name of the file in the Selected Measurements directory that defines which measurements are to be monitored i e potentially generate Caution and Alarm messages when the VM700A is in Auto mode Auto Sync Source specifies the synchronization source for Auto mode Possible values are Channel A Channel B Channel C External or Locked to Source The first four use the specified sources for synchronization Locked to Source uses whichever source is selected when the VM700A goes into Auto mode Source Name specifies text to be printed across the top of printouts generated by Auto mode or the Copy button This text may be set to any appropriate string up to 33 characters that helps identify the source Printout Title specifies text to be printed above the Source Name text across the top of printouts generated by pressing Copy This text may be set to any appropriate string up to 49 characters that helps identify the source Taken together the file names and parameter values contained in files in the Video Source Files directory define a complete measurement and reporting environment This environment is usually associated with a particular configura tion of equipment being monitored Thus for example you might create a file in the Video Source Files directory called
68. form positioning and gain and with the Graticule and Display Intensity buttons to set the brightness of the display When the end of range for a control knob assignment is reached a slight clicking noise will be heard if the knob rotation is continued in the out of range direction Display and Graticule intensity adjustment is controlled by the knob only when either of those buttons is held When the intensity buttons are released the control knob assignment reverts back to the Move Expand positioning function Move Expand When entering Waveform mode the control knob s default function is Horizontal Move positions left and right When Expand is selected by pressing the Move Expand button the waveform expands around the center of the screen Expand is also selected when the active area of the screen is touched The active area of the screen is that area above the horizontal graticule scale line The point touched becomes the point about which the display expands To move or expand the display vertically be sure the direction button indicator is Vertical and then rotate the control knob Note that selecting Expand with the button is only necessary for one handed operation Using the two hand touch and zoom method is much easier The VM700A Option 01 NTSC amp Option 11 PAL User Manual 4 3 Section 4 Waveform Mode Freeze 4 4 touch and zoom method makes use of the switching to Expand from Move feature Leave t
69. frequencies 2 1 Line Identification 4 2 line number display 4 2 Line parameter 3 18 Line Voltage Range Switch 2 1 line voltage ranges 2 1 Load Time soft key 3 9 Lock Left 4 12 Lock Right 4 12 Locked to Source 3 13 Locked Waveform 4 8 Log port 3 15 logical ports 3 15 loop through inputs 2 6 Low level diagnostics 9 1 Low pass Filter 4 9 Manual Adjust 4 9 Clamp Fast 4 10 Clamp Slow 4 9 DC Coupling 4 10 Duration 4 10 Level 4 9 Position 4 9 Manual Gain 4 8 Manual Overview 1 1 Measure Limits File 3 13 Measure_Limit Files directory 3 18 measurement deselection 3 21 selection 3 21 Measurement Locations Defining 8 4 VM700A Option 01 NTSC amp Option 11 PAL User Manual Measurement Locations directory 3 18 Measurement Results directory 3 19 Measurements Location File 3 13 Menu button 2 5 Mode Buttons 2 3 Move 4 3 Move Expand 4 3 N No Filter 4 9 Noise 0 dB 30 10 dB 4 8 noise reduction 5 3 O Offset 4 8 Option 48 1 2 Option 74 1 2 Option Power Cord Data 1 4 outputs 2 7 P parameter change in a file 3 7 Parity 3 16 password changing 3 20 enabling 3 20 resetting 3 20 setting 3 19 Password file 3 19 Physical Characteristics 1 3 physical ports 3 15 Picture Mode 7 1 Port changing assignment 3 16 Port and Format Assignments 3 15 port configuration 3 16 Position Backporch 4 9 Position Sync Tip 4 9 Power Cord 2 1 Power
70. g the power cord into a properly wired receptacle where earth ground has been verified by a qualified service person Do this before making connections to the input or output terminals of the product Without the protective ground connection all parts of the monitor are potential shock hazards This includes knobs and controls that may appear to be insulators Use the Proper Power Cord Use only the power cord and connector specified for this product Use only a power cord that is in good condition Use the Proper Fuse To avoid fire hazard use only the fuse specified in the parts list for this product matched by type voltage rating and current rating Do Not Operate Without a Cabinet To avoid personal injury do not operate the AM700 with its cabinet removed When power is supplied to the AM700 and the rear panel power switch is on line voltage will be present in the instrument even when the POWER switch is set to STANDBY Do Not Operate in Explosive Atmospheres To avoid explosion do not operate this product in an explosive atmosphere Do Not Service Alone Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and resuscitation is present viii VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 1 Introduction and Specification Section 1 Introduction and Specification Manual Overview This manual describes the front panel operation of the VM700A
71. ghted If it is not increase the Display Intensity until it is brighter than the other lines To edit a line within a file turn the control knob until the item you wish to edit is highlighted then touch the line on the screen There are four possible responses to this touch VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A 1 If the item that you touch is not editable the VM700A produces a click sound but the screen is not changed 2 If the item that you touch is to be edited alphabetically a keyboard appears on the lower half of the VM700A display screen 3 If you are to choose a new value for the item that you touch from a limited number of choices a box appears around the element to be edited You can then cycle through the available choices by turning the control knob 4 If you are editing a file that specifies whether elements are selected or unselected such as the Selected Measurements file you edit the file by touching the screen next to an element to place the element in the selected or unselected group NOTE The first line of a file is often an title line You may edit this line to provide a more descriptive identifier about the content or purpose of the file you are creating Editing the title line of a file does not change the file name To Change a Text Line Touch the line A box appears around the line and the soft key keyboard appear
72. guration files Basic information on each of these files and how to use the Configure mode directory structure is found in Section 3 Configuring the VM700A The following aspects of Auto mode can be configured by the user Caution and Alarm Limits can be user defined Auto Limit Files Locations of test signals on VITS lines and presence of zero carrier should be defined Measurement Locations file VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 8 Auto Mode A subset of the available measurements may be selected Selected Measure ments file A Timed Events file containing times for reports to be generated and the Selected Measurements file to be used at each report time can be specified Setting Alarm Limits Limit files for Auto mode are located in the Auto_Limit Files directory This directory is accessed by pressing the Configure button selecting the Configure Files softkey and then selecting the Auto_Limit Files directory There are five limits file in the directory when the instrument is shipped from the factory Each limit file contains a list of all the measurements available for the Auto mode Each measurement can have limits that when exceeded produce caution or alarm messages on the display Both Caution and Alarm Limits can be set for each measurement The supplied limit files cannot be edited Their contents can be viewed by selecting touching a file Only the Exit softkey is available to clo
73. hat a phone connection is made Pin 20 DTR Data Terminal Ready This pin is always high when the VM700A is turned on Modems typically require this signal to be a high level or they won t answer the phone Table 2 1 gives cable configurations that should work in most instances The pin numbers given for the Terminal DTE are the most common locations for the corresponding signals Note that there is considerable deviation from this common configuration and that not all devices use control lines in the manner described under this topic Refer to the instruction manual of the equipment you are connecting to the VM700A to determine exactly how it should be connected Note also that both ends of the DTE to DTE cable are typically female DB 25 connectors The DTE to DCE cable is female on the VM700A DTE end and typically male on the modem DCE end See the VM700A Programmer s Reference Manual for more information on connecting the VM700A for remote operation and cable wiring diagrams Table 2 1 Typical RS 232C Cable Wiring VM700A DTE to Terminal DTE VM700A DTE to Modem DCE VM700A Pin No Terminal Pin No VM700A Pin No Modem Pin No 1 1 Chassis GND 1 1 j 3 1 3 3 2 gt A 3 4 5 CTS 4 5 4 RTS po 0535 5 7 7 Signal GND 7 7 2 8 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 2 Installation and Operation Table 2 1 Typical RS 232C Cable Wiring Cont
74. hat information in the display memory Therefore it is not possible to scroll through the entire field when Freeze is selected only the acquired lines may be displayed VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 4 Waveform Mode Waveform Menu Sync Clam 1H Cursors Sync Noise Extra Filter Clamp Display 30 10 dB Functions Select Couple Cursors Submenu eee Center Lock Center Lock Reset Reset Cursors Left Left Right Right Cursors Diffs StayOn i Submenu ke rs qf HL IN CES CI HIER PUR mer ea MP A A M Ben i Sync Sync Sync External Locked to Change A B C Sync Source Sampling i Extra Functions Submenu i Gain Offset Manual Screen Precision Locked Fixed i x 1 00 0 21V Gain Memory Mode Waveform IRE E Filter Select Submenu i ERA TOE are er Dr Ser az jo ES ENS ae ee edi aec z No Highpass Lowpass Diff Step LF Noise LF Noise LF Noise Filter Filter Filter Filter 7 5 KHz 10 KHz 15 KHz p Couple Submenu Position Position Clamp Clamp DC Manual Backporch Sync Tip Slow Fast Coupling Adjust Manual Adjust Submenu Position Level Clamp Clam
75. he Move Expand choice in Move and select the direction either vertical or horizontal Move the waveform to the point of interest then touch the screen at the point about which you wish the waveform to expand or compress The function of the control knob switches to Expand while the screen is touched and defaults back to Move when you lift your finger from the screen Expand Gain Range The horizontal gain of the default 1H Waveform display can be continuously compressed or expanded to display from 10 ns to 704 us 11 lines across the screen Vertically the Volts scale ranges from 1 mV full scale to 10 V full scale The calibrated graticule scale tracks the waveform as it expands compresses or moves both vertically and horizontally NOTE Using the Expand function to change the display gain does not affect the analog processing of the signal Signals of up to 4V peak to peak may be received Display and Graticule Intensity Display and Graticule intensity adjustments are also made with the control knob While the Display button is depressed the control knob varies the intensity of the waveform menu information and any other text on the display not associated with the graticule While the Graticule button is held in the control knob varies only the intensity of the graticule and the background text displays When Freeze is selected by pressing the Freeze button the VM700A acquires consecutive frames of 50 lines each and holds t
76. he center of the directory window and a keyboard appears below it The characters you select type appear in this box Type the new file name observing the following rules and noting the special uses of some characters and keys 1 Spaces are not allowed in file or directory names use an _ underline or dot to separate words in a name 2 Pressing the Setl soft key allows you to enter numerals and punctuation characters Pressing the Set2 soft key allows you to enter various special characters Pressing the Shift soft key allows you to enter uppercase characters or more punctuation characters in the case of the shifted version of Set1 Both the Set1 and Set2 character keys and the Shift soft key lock when selected Set1 and Set2 are unlocked by touching the same key again or touching the un selected key of the pair Shift is unlocked by touching Shift again VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 5 Section 3 Configuring the VM700A 3 6 Editing Files 3 A maximum of 31 characters are allowed in a file or directory name 4 Use only uppercase and lowercase letters numbers and the following punctuation characters _ underline dot minus sign plus sign colon and tilde in names Avoid using punctuation characters other than those mentioned above in a directory or file name Multi line directories and file names can be entered using the RETURN key Touch RETURN o
77. highlighted Touch the limit you wish to change or remove Scroll the control knob to display the desired value or select Make it undefined if you wish to remove the limit Select the Accept Input soft key or touch the screen anywhere inside the directory window to return the control knob to its scrolling function VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A Setting a pair of limits backwards setting an upper limit lower than its lower limit always generates an alarm flag on the Auto mode display Alarm limits may be set inside Caution limits but then only Alarm limit violations are flagged Communication The VM700A has two RS 232 C serial ports Either port can be attached to an Setup File ASCII Epson HP LaserJet or PostScript printer or to a modem or terminal for serial communication during remote operation The Communication Setup file tells the VM700A how the RS 232 C ports are configured The factory default settings are the proper settings for an Epson LQ 570 printer connected to Serial Port 1 NOTE Option 48 the GPIB Interface option adds a parallel GPIB port Any or all of the logical ports may be set to GPIB when the option is installed Port and Format Assignments The VM700A has two physical ports Serial Port 0 Serial Port 1 and five logical ports Copy the port to which screen dumps generated by pressing the Copy button as well as printo
78. if the waveform is moved by the knob NOTE Calibration is suppressed in Screen Memory mode Precision Mode provides a higher accuracy display for waveforms with rise times between 5 MHz and 6 MHz However the system update rate is slowed when Precision mode is on This mode is useful for cursor measure ment of fast edges 1T pulses etc Locked Waveform When highlighted this key disengages knob movement Moving the knob resets the calculation when accumulating averages and resets the screen when in Screen Memory mode This soft key prevents this from happening accidentally It also changes cursor mode to make the knob move the cursors if they are unlocked from the waveform VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 4 Waveform Mode Fixed IRE NTSC Only When highlighted overrides the Zero Carrier Pulse and Bar Reference selections in the current Measurement Locations file and fixes the IRE scale to 0 IRE 0 Volts 140 IRE per Volt Filter Select This choice provides soft keys to select any of six filter characteristics or no filter When filters are engaged measurement or timing information may become less reliable Pressing the Filter Select soft key brings up the following submenu No Filter displays the waveform without any filtering default High pass Filter removes luminance from the signal The pass band is approximately 2 5 MHz to 6 MHz Low pass Filter removes chrominance fro
79. iles sub directories except Measurement Results contain a file named System Defaults System Defaults files are used as templates to create new files in a directory For more information about creating customized files for a directory see the discussion of Configure Operations earlier in this section The following pages describe the nvramO ConfigFiles hierarchy and how it controls VM700A operation The Source_Selection Video file and the Video_Source Files subdirectory are discussed first This is followed by a description of the contents and function of the other files and sub directories in nvramO ConfigFiles The Source Selection Video file assigns a file in the Video Source Files directory to each of the VM700A signal sources A B and C When a given source is selected that is when its front panel Source button is on the VM700A gets parameter information from the file in the Video Source Files directory pointed to by the corresponding entry in the Source Selection Video file Figure 3 4 illustrates the relationship between the current signal source as indicated on the VM700A front panel the Source Selection Video file and the contents of the Video Source Files directory The following text is an example of a typical Source Selection Video file Station XYZ s video source file Channel A Video Source tx1 Channel B Video Source tx2 Channel C Video Source studiol Timed Events My_Events With the text of th
80. ing in erratic behavior if WARNING If the Locked to Source soft key is not highlighted the sync source the relative timing between the two inputs is not close External Sync sets the sync source to external sync This input cannot be displayed or measured Locked to Source When highlighted indicates that the sync source and the input source are the same Changing the signal source also switches the sync to the new signal source Sound in Sync PAL only not shown in Figure 4 2 enables the VM700A to lock or sync to signals that contain digitally encoded sound information in the sync pulse When sound information is contained in the sync pulse Sound In Sync must be selected or else the VM700A will display the message Loss of sync When Sound In Sync is selected less of the sync pulse is available for synchronization which makes the signal timing more susceptible to noise and jitter The Sound In Sync soft key only affects Waveform mode For all other manual modes Sound In Sync is enabled with the SIS Present yes parameter in the active Measurement Locations file VM700A Option 01 NTSC amp Option 11 PAL User Manual 4 7 Section 4 Waveform Mode 4 8 Noise 0 dB 30 10 dB Extra Functions Change Sampling toggles between synchronous asynchronous and free run sampling For a stable source use synchronous mode for an unstable source VCRs etc first use asynchronous mode and if this does not
81. ion 6 Measure Mode Video Option Measurement Menu Operation Figure 6 1 shows the Measure mode menu with Video Options selected Notice that a directory for each installed Video option is displayed This menu feature was added in the Version 2 08 firmware release to assist a user in making a option measurement choice Previous versions of firmware provided a complete list of all the installed option measurements in an alphabetical arrangement This arrangement allowed menu choices for the measurements of the different options to be intermingled The new arrangement separates the option measurements to assist the user in making a selection from a shorter list of measurements for a single option as illustrated in Figure 6 2 Colorimetry Defects Detail Fixed_Pattern Frequency Gamma Noise Response Geometry Shading Vertical Smear Registration Video Previous Leave Video Audio DS Options Selection Directory Figure 6 2 Measure menu of Camera Video Option 6 2 The menu choice of Previous Selection returns the VM700A back to the previously selected measurement The menu choice of Leave Directory displays the next higher level of the menu hierarchy The directories and files in the higher level menu displays are not accessed via this route in normal operation They are normally acc
82. k tests CalDac Adjustment Adjusts gain of internal CalDac Used as reference for internal self calibration Measure S inewave Allows you to input external sine waves and measure them Used for verifying system flatness See the VM700A Video Measurement Set Service Manual for details Measure S quarewave Allows you to input a chopped calibrated square wave and measure it Used for verifying system DC accuracy See the VM700A Video Measurement Set Service Manual for details Measure Temperature Measures internal instrument temperature Can be used to relate instrument internal temperature to ambient temperature Warm_Reboot Simulates cycling power Can be used to copy contents of console buffer which may contain useful diagnostic information from main memory into file console where it can be accessed printed etc Power Up Diagnostic Errors When the VM700A is powered up normally it first runs the low level diagnos tics then runs the individual diagnostics selected in the Diagnostics Selection file in directory nvramO ConfigFiles While running low level diagnostics the VM700A displays the name of each low level test in progress When low level diagnostics are completed the VM700A displays the message LOW LEVEL DIAGNOSTICS COMPLETE When a low level diagnostic routine detects an error the VM700A displays the message Press any Front Panel Button or Toggle 1 of 3 CPU MODE switches to CONTINUE AUTOMATI
83. l measurements Setting Event Times Files in the Timed Events directory provide a facility for producing scheduled reports of Auto mode measurements or executing functions at specified times Reports consist of a set of measurements designated by a selected measurements file A few lines from a user generated New Timed Events file follow New Timed Events file Time Type Channel Standard Selected File Nam 12 00 report A NTSC System Default 23 00 function B PAL Night_reset The active Timed Events file is specified on the last line of the Video Source file When the VM700A senses an event time specified in the active Timed Events file it does one of two things If the event is a report it selects the channel and standard then runs the measurements included in the Selected Measurements file specified by the active Timed Events file If the event is a function it selects the channel and standard then executes the function specified by the active Timed Events file The Report Time is entered in 24 hour format Any file in the Selected Measure ments directory may be specified at any Report Time At any Event Time regardless of what mode it is in the VM700A screen will blank and display a message indicating that a Timed Event is occurring You will see the LED in a SOURCE channel button light when measurements are being made for a report on that channel Report generation can also be overridden only by entering Remote Operati
84. le is 012 1285 00 Should you want you may wire your printer cable for the HP to VM700A connection The necessary wiring information is provided in Table 2 4 Making Your Own Printer Cable Table 2 4 lists the wiring connections for making a cable to use with an HP LaserJet ThinkJet or DeskJet printer plotter Table 2 4 HP LaserJet Cable Connections Connecting an ASCII Printer Male DB 25 Connector Pin Number HP LaserJet ThinkJet or DeskJet end 1 shield ground Female DB 25 Connector Pin Number VM700A end 1 shield ground 3 RXD 2 TXD 2 TXD 3 RXD 7 signal ground 7 signal ground 20 DTR 5 CTS 1 The pin 20 to pin 5 connection is required only for hardware flow control It may be omitted for XON XOFF flow control The VM700A can also be configured to operate with a generic ASCII printer In the Communication Setup file set the Report Format and Log Format to ASCII Printer A generic ASCII printer is assumed to only print text graphic functions are not supported NOTE When Copy Format is set to ASCII Printer the Copy function is disabled in Waveform Vector Picture and Measure modes only the text from Auto mode text from Measurement Results files in Configure mode and the Print File soft key function in Configure mode are enabled VM700A Option 01 NTSC amp Option 11 PAL User Manual 2 11 Section 2 Installation and Operation 2 12 VM700A Option 01 N
85. le soft key or the file can be deleted using the Delete soft key When diagnostic errors appear refer to the appropriate servicing information to locate the possible cause of the problem This information may be found in the VM700A Service Manual The maximum capacity for the Diagnostic Errors file is 100 lines in a circular file scrolling past the last entry returns to the top line of the file If the number of errors detected causes the file to exceed this length the earlier results are scrolled out of the file buffer When this occurs the Diagnostic Errors file includes a message stating that some of the text has been scrolled out of the file Diagnostics The Diagnostics Selection file lists the diagnostics the VM700A can perform at Selection File power up If installed options require additional diagnostics those are also listed As received from the factory all diagnostics are performed by default Any diagnostic can be deselected by rotating the control knob until the diagnostic is highlighted then touching the right side of the highlighted line above the words Not Selected In the following example the FilterBoard Diagnostic routine will not be performed VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 17 Section 3 Configuring the VM700A Measure_Limit Files Directory Measurement Locations Directory 3 18 Power Up Diagnostics Selection Genlock Diagnostic Controller Diagnostic Acquisition
86. lied the displays contain no useful information The bandwidth of the VM700A is 0 Hz DC to approximately 6 8 MHz The VM700A has three video loop through inputs one external sync loop through and two RS 232C DTE ports on its rear panel Figure 2 3 The audio options 40 and 41 add appropriate connectors for application of the audio signals to the option circuitry The GPIB Interface Option 48 add a standard GPIB connector for remote control and GPIB hardcopy output Any video signal of the appropriate format may be connected to any video input for normal operation Certain options Camera and Component being examples require connections to specific inputs for correct operation Refer to the option manual when connecting signals to make those option measurements VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 2 Installation and Operation CAUTION TO AVOID ELECTRICAL SHOCK Poi PROTECTIVE GROUND MUSTBE CONNECTED TO EARTH GROUND Figure 2 3 VM700A rear panel Fan Exhaust RS 232 Ports RS 232C Connections The two RS 232C DTE ports of the VM700A are used to output graphics and reports to a printer as well as for remote operation via a modem or direct serial connection Both connectors are located on the A5 CPU board and are accessible on the rear panel Both are 25 pin male D connectors The Communications Setup file is found in the Configure Files direc
87. ly toggles between display of lines with a V axis a V axis or both axes default VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 5 Vector Mode Vector Menu Change Burst Noise 75 Bar Setup Reference 15 05 dB Col Burst Reference Submenu Burstin Burstin Burst in Burst in Source Ch A Ch B Ch C Figure 5 2 Vector mode menu Change Setup NTSC only toggles the graticule for a proper display of a color bar signal with either 7 5 setup Setup 7 5 or no setup Setup 0 Burst Reference brings up the following submenu to select the reference source for color burst Burst in Source sets the color burst reference to the current signal source Burst in Ch A B C the color burst reference is set to the specified channel When a color burst reference is set to a channel other than the source channel an additional readout is provided at the top of the vector display screen The timing difference between the two channels is provided in time and degrees The two channels must have a common burst reference to provide any useful information about the time difference between channels A typical readout is this case is ChA after ChB xx ns degrees xx where xx represents the measured timing difference Noise sets the amount of noise reduction in decibels when the Average button is pressed For PAL each V axis is averaged separately
88. m The manual modes perform the specified operation and provide a graphic display with digital readouts plus status information Auto mode makes measurements automatically and provides a tabular listing of the measurement results Reporting of measurement results can be performed in both manual and Auto mode Parameters such as clamping sync source and the displayed line system line are common for all the manual modes of operation However manual mode parameters do not carry over to Auto mode Parameters for both Auto mode and the manual modes are set through the directory and file structure accessed through the Configure button The second row down in the keypad contains the Freeze button the input channel selection buttons grouped as SOURCE A B and C and the Average button Freeze When Freeze is selected signal acquisition is halted The frozen display may be repositioned or resized according to the application as described below under Control Knob but the display is not updated Starting a new measurement or operation unfreezes the display Source and Polarity Selection For all operational modes one of the input sources is always selected Selected sources are indicated by a lighted LED in the panel button For some modes an input source can be inverted This feature may be used to invert a positive sync video signal to obtain the correct polarity for measurement by the VM700A To invert a single source press and hold
89. m the signal The pass band is approximately 0 MHz to 1 MHz Diff Step Filter removes chrominance from the signal then displays the direction and relative size of signal transitions LF Noise 7 5 KHz 10 kHz 15 kHz removes all signal information above the specified frequency Clamp Couple Pressing the Clamp Couple soft key brings up the following submenu Position Backporch sets the clamp position to the back porch and the clamp level to 0 0 Volts Position Sync Tip sets the clamp position to the sync tip and the clamp level to 0 3 Volts 0 29 V for NTSC Clamp Slow selects slow clamp speed This allows hum effects to be visible but is useful for coping with large DC offsets on an input signal Clamp Fast selects fast clamp speed This removes DC offset hum and bounce effects from the signal DC Coupling selects DC coupling no clamping Manual Adjust brings up the following submenu Position adjusts the horizontal clamp position within a line Level adjusts the clamp voltage level from 1 28 V to 1 27 V in 10 mV steps Adjustments outside 300 mV may cause APL measurement problems Clamp Slow selects slow clamp speed This allows hum effects to be visible but is useful for coping with large DC offsets on an input signal VM700A Option 01 NTSC amp Option 11 PAL User Manual 4 9 Section 4 Waveform Mode Select Line System Line 4 10 Clamp Fast selects fast clamp speed This removes DC o
90. must be changed before connecting the power cord to the power source Simply set the voltage range selection switch located on the rear panel of the VM700A to the correct position for operation CAUTION When changing the line voltage selector switch you must also change the fuse to provide proper protection for the operating voltage in use The 3A slow blow fuse provides the proper protection in the 230 VAC range and the 6A slow blow fuse provides protection for operation in the 115 VAC range A detachable three wire power cord with a three contact plug is provided with each instrument for connecting to both the power source and protective ground The protective ground connector in the plug connects through the protective ground conductor to the accessible metal parts of the instrument For electrical shock protection insert this plug only into a power source outlet that has a properly grounded protective ground contact VM700A Option 01 NTSC amp Option 11 PAL User Manual 2 1 Section 2 Installation and Operation CAUTION TO AVOID ELECTRICAL SHOCK POWER CORD PROTECTIVE GROUND MUST BE CONNECTED TO EARTH GROUND LINE FUSE VOLTAGE RATING SETTING 250V REPLACE 115V FUSE AS 905 192 ES SPECIFIED 230V 3A S 180 250V 400 VA MAX 44 68 HZ LINE SELECTOR Figure 2 1 Rear panel fuse power connector
91. n the touch screen keyboard to get to the second line When the VM700A is in remote mode the return character becomes a tilde character for purposes of file name reference Thus a directory whose name is displayed as JOHN SMITH in the directory display becomes JOHN SMITH when referred to in a remote operation After typing the name touch Done to complete the creation of the file or press Cancel to quit the process and not create the file To Delete a File Press the Delete soft key The VM700A prompts you to select a Select touch the icon corresponding to the file to be deleted Note only user created files can be deleted The icon containing the name of the selected file switches to reverse video and begins to disintegrate from the display while the VM700A beeps at one second intervals The disintegration deletion process lasts six seconds It can be stopped by touching the screen inside the directory window or by touching the Delete soft key a second time Halting the deletion process before its completion has no effect on the file To edit a file simply touch the icon corresponding to the file you wish to edit This displays the contents of the file for editing Within the file there are only certain fields that a user may change the value of edit You can view the contents of the file by rotating the control knob to scroll the file lines up or down The line in the center of the window should appear highli
92. nel and the Selected Measure ments file in use a soft key labeled Cancel Report and the measurements being made Pressing the Cancel Report soft key halts the timed report execution Once the report is complete the VM700A returns to the mode it was in when the report began The Copy button flashes until the report is either printed or canceled with the Cancel Copy soft key in the initial Configure menu When a function time occurs the VM700A executes the function When the function has been executed the VM700A remains in the state specified by the body of the function it does not return to the state it was in when function execution began NOTE If the VM700A is in remote mode during a scheduled timed event the scheduled event is not performed VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A To Create a Timed Events File 1 Press the Configure button Touch the Configure Files soft key Touch the icon for Timed Events Touch the Create File soft key Touch the icon of an existing file to use as a template nn Pp m Give the new file a name using the on screen keyboard press Done when you have finished entering the name The contents of the new file appear on the screen ready for editing To Setup Timed Events 1 Create a Timed Events file 2 If any reports are to be generated make sure the Report Port in the Commu nication Setup file has a value other than
93. o run but the numbers in the soft keys do not advance with the time and display the time that was present when the Time Configure menu was selected Select the Year Month Date Hour Minute or Second soft key Rotate the control knob to set the year month date hour minute or second Set the minute and second time 30 seconds or so slightly ahead of the reference clock time so that you can set the time exactly to your reference time Select the Load Time soft key to enter the new time and date at the exact time you have set for the clock This enters the time and restarts the clock at that time VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 9 Section 3 Configuring the VM700A Directory Structure Source_Selection Video 3 10 File After the new time and date have been loaded press the Configure button to exit the Time display and return to the mode previously in effect Press Configure again to return to the top Configure display VM700A operations are controlled by means of a hierarchy of files and directories that starts with the Video Source file in the nvram0 ConfigFiles directory and extends to other files in sub directories of nvramO ConfigFiles You can customize the operation of the VM700A to suit your specific measure ment requirements and switch quickly between VM700A setups as needed to perform different operations by varying the contents of these files and sub directories All ConfigF
94. oft key brings up a display of the nvram0 FunctionKeys directory along with a submenu that lets you create rename edit delete and print out function keys Use of the Function Keys feature is fully explained in the VM700A Programmer s Reference Manual Cancel Copy Pressing this soft key clears all copies in the spooler The Cancel Copy soft key appears as a choice in the Configure menu only if there are files in the printer queue Touching it deletes the files from the queue Configure mode like other modes may be selected at any time When the Configure button is pressed again to deselect Configure the VM700A returns to the mode or application for example measurement that was active when Configure was selected The remainder of this section is divided into two parts The first part describes the operations available in Configure mode it tells you how to create or delete files in a directory how to edit files etc The second part describes the Configure mode directory structure and the files it contains 3 2 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 3 Configuring the VM700A Configure Operations This section covers basic information on how to traverse directories and edit files in Configure mode The Configure Directory Structure After you press the Configure button and touch the Configure Files soft key the VM700A displays the files and sub directories in the nvramO ConfigFiles direct
95. olled You can operate the instrument via a computer or terminal connected through a rear panel RS 232C port See the VM700A Program mer Reference Manual for information on remote programming and operation If Option 48 GPIB interface is also installed the VM700A may be operated remotely via the GPIB port See the VM700A Option 48 GPIB Interface Programmer Manual for information about GPIB remote control An added display option is available for the VM700A Option 74 provides a display module with a white phosphor CRT instead of the standard green phosphor when a VM700A is ordered with the option 1 2 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section Introduction and Specification Instrument Specifications Table 1 1 Physical Characteristics Characteristics Dimensions WxHxD Description 19 0 inches x 8 75 inches x 21 9 inches 483 mm x 222 mm x 556 mm Weight 45 lb 20 Kg Table 1 2 Power Requirements Characteristics Description Mains Voltage 90 to 132 VAC 115 VAC nominal 180 to 250 VAC 230 VAC nominal Mains Frequency 47 to 63 Hz Power Consumption 250 Watts Fuse 115 VAC 6 A 250 V Slow Blow 0 250 X 1 250 230 VAC 3 A 250 V Slow Blow 3AG MSL 3 Table 1 3 Environmental Characteristics Characteristics Temperature Operating Non operating storage Altitude Operating Non operating EMI Table 1 4 Remote Relay Characteristics Remote Contact Cl
96. om defects in materials and workmanship for a period of one 1 year from the date of shipment If any such 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 responsible 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 service a product that has been modified o
97. on mode The Event Times System Default file is the only file available for selection when the instrument is shipped Any additional files you create to provide time events for your application are also available for selection VM700A Option 01 NTSC amp Option 11 PAL User Manual 8 5 Section 8 Auto Mode 8 6 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 9 Diagnostics Section 9 Diagnostics Introduction Low Level Diagnostics The VM700A self diagnostic routines evaluate each of the instrument s major hardware components The primary intent of the diagnostics is to provide a high degree of confidence that measurement results produced by the instrument are correct The diagnostics can also supply useful information for board level fault isolation The diagnostic description and operation is provided here to assist in determining the need for servicing and aid in configuring the diagnostic tests files Refer all servicing to a qualified service person There are three groups of diagnostic routines on the VM700A Low level diagnostics run during the instrument s power up cycle and test basic elements of the hardware specifically the CPU EPROM board and Display Memory board needed to ensure the validity of the remaining diagnostics Individual diagnostics test other VM700A hardware components The tests in this group can be selected to run at power up after the low level diagnostics in a continu
98. ontrol knob to scroll through the values or selections available for that parameter Touch the Accept Input soft key or touch the screen anywhere inside the directory window to accept the new selection NOTE In the Selected Measurements file s and the Diagnostics Selection file parameters are either Selected on the left side of the display or Not Selected on the right side of the display To Select Unselect a Paramter Touch the line that the parameter appears on on either the Selected left or Unselected right side of the display To Save Changes to a File and Exit Touch the Update amp Exit soft key To Exit Without Saving Changes Touch the No Change amp Exit soft key If the file has been modified a message box appears warning you that the file has been modified Press No Change amp Exit or any hardkey to exit without saving the file press Update amp Exit to save changes to the file and exit the edit session Any VM700A file can be printed by selecting the Print File soft key and selecting the file The file is printed from the serial port designated as the Copy Port The LED in the Copy button lights continuously while the VM700A creates a print file and flashes until the entire print file has been sent to the printer To Start File Printing Display the directory containing the file you want to print Press the Print File soft key Press the icon containing the name of the file you want to print To
99. order from left to right top to bottom Each of the VM700A option manuals provides details on configuring the files for the options VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 3 Section 3 Configuring the VM700A If you are unfamiliar with the terms file and directory the following may help A file is a collection of information A directory is a structure that can contain zero or more files or other directories Directories are organized in a tree structure Touching the icon of a directory displayed in a window opens that directory This is also known as going down the directory tree Pressing the Leave Directory soft key closes the directory and displays the next higher directory in the directory structure This is also known as climbing up the directory tree To Enter a Directory Touch the icon showing the name of the directory you wish to enter Whenever a directory is open another soft key labeled Leave Directory appears below the directory window To Leave a Directory Select the Leave Directory soft key This closes the current directory and opens the next higher directory in the directory structure When you open a directory a line appears below the directory window but above the soft keys indicating the path the directory or file location in the directory structure to the displayed directory For example if you were viewing the contents of the Measure_Limit Files dire
100. orm Mode To Make an Amplitude Measurement Vertically expand the desired portion of the signal to give adequate resolution Use the control knob to position the bottom or top of the portion of the waveform to be measured on the horizontal reference line See Figure 4 4 Select the Reset Diffs soft key to reset the Vertical delta readout to 0 000 Volts Use the control knob to position the top of the portion of the waveform to be measured on the horizontal reference line See Figure 4 5 The Vertical delta readout now indicates the absolute amplitude of the waveform 2 0 2 0 6 0 5 0 10 0 12 0 Noise reduction 15 05db MicroSeconda APL 100 0 Preciaion Mode OFF 525 line NTSC Na Filtering Synchroneua Sync Source Slow clamp to 0 00 V at 6 63 us Frames selected 1 2 Sine pk pkim 285 freg MHzj 3 58 offaetim 5 Time From L to R 0 000 MicroSeconda Vertical delta 0 288 Volta Frequency 1 Tj UNDEFINED UNDEFINED peint Center Lock Center Lack Reset Reaet Curaora Left Left Right Right Curasra Diffa j Stay on Figure 4 5 Cursors mode indicating color burst amplitude 4 16 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 5 Vector Mode Section 5 Vector Mode Introduction This section provides a detailed description of the capabilities of Vector mode and tells how to operate the VM700A as a vectorscope Display Vector mode provides a conventional vector display Because the display is
101. ory see Figure 3 2 Files and directories are displayed as icons enclosing the file or directory name Directory icons consist of two overlapping rectangles file icons consist of single rectangles Below the directory display is the path line indicating the displayed directory s location in the directory structure and two soft keys Print File and Leave Directory A dual standard instrument also has the additional soft key of Switch NTSC PAL displayed with the selected choice identified as either NTSC Files or PAL Files Audio_Limit Audio_Source Audio_Source Files Files Identification Auto_Limit Communication Component Files Setup Diagnostics Diagnostic Echo_Rounding Selection Errors Measure_Limit Measurement Measurement Files Locations Results FR NTSC Files In nvram C onfigF iles Switch Print Leave NTSC PAL File Directory Figure 3 2 Configure Directory If there are more directories or files than can be displayed in the window area of the screen designated for directory icon displays use the control knob to scroll up or down to display the remaining choices The exact number of directories and their names depends on the installed options All the directories are given in alphabetical
102. osure Relay Maximum Current Description 0 to 50 C ambient 55 C to 75 C To 4 570 meters 15 000 feet Maximum operating temperature decreases 1 C per 1 000 ft above 5 000 ft To 15 240 meters 50 000 feet Meets FCC CFR Part 15 Sub part B Class A Description Contacts are not debounced 50 mA VM700A Option 01 NTSC amp Option 11 PAL User Manual 1 3 Section 1 Introduction and Specification Table 1 4 Remote Relay Cont Characteristics Maximum Voltage Control Logic 30 VACrms or 30 VDC set GRLY 1 closes the relay set GRLY 0 opens the relay Table 1 5 Optional Power Cords Power Plugs Reference Standards Standard ANSI C73 11 North American NEMA 5 15 P 120 V plug IEC 83 15A UL 198 6 Option A1 CEE 7 Universal Euro Il IV VII 220 V plug IEC 83 10 16A IEC 127 Option A22 BS 1363 United Kingdom IEC 83 240 V plug IEC 127 6A Option A3 AS C112 Australian IEC 127 240 V plug 10A Option A4 ANSI C73 20 North American NEMA 6 15 P 240 V IEC 83 15A UL 198 6 Option A5 SEV Switzerland IEC 127 220 V plug 6A Reference Standards Abbreviations ANSI American National Standards Institute AS Standards Association of Australia BS British Standards Institution CEE International Commission on Rules for the Approval of Electrical Equipment IEC International Electrotechnical Commission NEMA National Electrical Manufacturer s Association SEV S
103. ous loop or one at a time Diagnostic measurements measure various VM700A operating parameters The tests in this group always run one at a time The remainder of this section lists and describes the diagnostics in each of the three groups then discusses how diagnostics are run at instrument power up how to run individual diagnostics and diagnostic measurements and concludes with other diagnostic related information Low level diagnostics perform basic tests on the operation of the A5 CPU board the A6 EPROM board and the A9 Display Memory board Table 9 1 lists and describes the VM700A low level diagnostics VM700A Option 01 NTSC amp Option 11 PAL User Manual 9 1 Section 9 Diagnostics Table 9 1 VM700A Power Up Diagnostics Board Tested Test Name Description CPU Math Co processor Checks for exception errors when the math co processor performs floating point computations CPU NVRAM Standard RAM test Decoding Checks decoded address space size SegmentSize Checks the size ofthe RAM segment Address Lines Checks address integrity Data Lines Checks data bus integrity Valid Memory Performs checkerboard pattern to testRAM Display F ront P anel Shared RAMa Standard RAM test Decoding Checks decoded address space size Segment Size Checks the size of the RAM segment Address Lines Checks address integrity Data Lines Checks data bus integrity Valid Memory Performs checkerboard pattern to test RAM EPRO
104. owing either of these procedures refer to the appropriate servicing information to locate the source of the malfunction Individual Diagnostics In addition to the low level diagnostics any combination of individual diagnos tics can be made to run automatically at power up In order for an individual diagnostic to run automatically at power up the diagnostic must be designated as selected within the Diagnostics Selection file located in directory nvramO ConfigFiles When the VM700A is powered up the diagnostic applications selected in the Diagnostics Selection file are automatically executed after the low level diagnostics are completed Results of individual diagnostics are displayed in Power Up mode each line in the display summarizes a group of tests performed by the diagnostic Diagnostics Selection File When the VM700A is powered on the diagnostic routines selected in the Diagnostics Selection file are executed The contents of the Diagnostics Selection file are shown in Figure 9 1 VM700A Option 01 NTSC amp Option 11 PAL User Manual 9 7 Section 9 Diagnostics Power Up Diagnostics Selection Genlock Diagnostic Controller Diagnostic Acquisition Diagnostic ADC Diagnostic AnalogInput Diagnostic FilterBoard Diagnostic GPIB Diagnostic AudioProcessor Diagnostic AudioAnalog Diagnostic Selected Line 6 Not Selected Figure 9 1 Power Up Diagnostics Selection display All diagnostic routine
105. p Option 11 PAL User Manual Section 8 Auto Mode Section 8 Auto Mode Introduction Auto mode of the VM700A executes a configurable list of continuously performed measurements Whereas Measure mode makes individual measure ments that are graphically displayed Auto mode performs all the selected measurements and generates the measurement results in tabular format The measurements to be made and the limits to measure to are obtained from the configuration files The Auto mode measurements provide a large amount of information about the signals being measured and indications of violations of user selectable measurement limits This section discusses Auto mode operation and how to configure it Display When you press the Auto button the VM700A displays the measurements being made in Auto mode Due to the large number of measurements made by Auto mode not all of them can be displayed on the screen at once The control knob is used to scroll the display to view all of the list of measurements and results As each measurement is made the measurement s name the measured value measurement units and the limit values for the measurement are highlighted When the complete list of measurements has been made the highlighted text returns to normal display The Auto mode measurements are not affected by the sync and clamping parameters set in Waveform mode for the manual measurements Measurement In Auto mode the VM700A lists measurement n
106. p DC Duration 6 635 ms 0 00 V Slow Fast Coupling 2 00 ms Figure 4 2 Waveform menu tree VM700A Option 01 NTSC amp Option 11 PAL User Manual NOTE The LED in the Menu button is on when the Waveform menu is displayed If the Menu button is pressed when the Menu LED is on the menu is unselected removed from the display and the Menu LED goes off Section 4 Waveform Mode Menu 4 6 Cursors Pressing the Menu button while in the Waveform mode displays a row of soft keys along the bottom of the display This row of soft keys is known as the Waveform menu The entire Waveform mode menu tree is shown in Figure 4 2 Pressing the Menu button when the VM700A is in Waveform mode displays the Waveform menu which is structured as follows 1 11 H Display resets the Waveform display to fit a specified number of lines 1 to 11 into the display When possible it aligns the front porch of the system line to the left edge of the display and 0 volts is aligned with the horizontal reference line To select the number of lines to display hold the soft key while turning the knob This choice provides a set of cursors centered on the waveform display To position the cursors move the waveform over the cursor and lock the cursor to the desired point of the waveform When cursors are on the lower part of the display contains three additional status lines for cursor measurement results Pre
107. pport If the VM700A diagnostics detect a problem the Console and the Diagnostic Errors files may contain information that could be of use to service personnel Console File Whenever the VM700A initializes information is stored in the console file located in the topmost directory If the VM700A performs an auto reset due to a malfunction the console file may contain information useful to a service person You can use the Print File softkey to make a copy of the console file The contents of this file are overwritten each time the VM700A is powered on Diagnostic Errors File When user selectable diagnostics are run at power up or during DiagsLoop all errors detected are written to the Diagnostic Errors file found in directory nvram0 ConfigFiles The Diagnostic Errors file is automatically created when an error is detected by user selectable diagnostics Its contents may be printed using the Print File softkey The maximum capacity for the Diagnostic Errors file is 100 lines If the number of errors detected produces a file whose length exceeds this limit the earliest results are scrolled out of the file When this occurs the file includes a message stating that some of the text has been scrolled out VM700A Option 01 NTSC amp Option 11 PAL User Manual 9 15 Section 9 Diagnostics 9 16 VM700A Option 01 NTSC amp Option 11 PAL User Manual Index Index Symbols 1 11 H Display 4 6 Numbers 20T value 3 19
108. r 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 WITH RESPECT TO THIS PRODUCT 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 CUSTOMER 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 Contacting Tektronix Product Support Service Support For other information To write us For application oriented questions about a Tektronix measure ment product call toll free in North America 1 800 833 9200 6 00 a m 5 00 p m Pacific time Or contact us by e mail support tek com For product support outside of North America contact your local Tektronix distributor or sales office Contact your local Tektronix distributor or sales office Or visit our web site for a listing of worldwide service locations http www tektronix com In North America 1 800 833 9200 An operator will direct your call Tektronix Inc P O Box 500 Beaverton OR 97077
109. rements available To Select or Unselect a Measurement Open the Selected Measurements file for editing by touching its icon in the display of the nvrar0 ConfigFiles Selected_Measurements directory Scroll the file using the knob until the desired measurement is highlighted Note that the labels Selected and Not Selected are printed below the directory window Touch the highlighted line on the Selected side of the screen to select the measurement or on the Not Selected side of the screen to deselect the measurement If you wish to select only a small subset of the available measurements press the Select None soft key and then make your measurement selections If you wish to unselect only a small subset of the available measurements press the Select All soft key then unselect the measurements of your choice Timed Events Directory Files in the Timed Events directory provide a facility for producing scheduled reports of Auto mode measurements and performing operations in the form of functions to be played back at specified times Events occur at times specified by the current Timed Events file The Report Port setting in the Communication Setup file must be set to Port 0 or Port 1 not None for reports to be generated VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 21 Section 3 Configuring the VM700A 3 22 Consider the following lines from a user generated Timed Events file named daily_events
110. rol of the VM700A via a pc Instrument Overview The VM700A Video Measurement Set is a multifunction television test and measurement device with an easy to use interface The VM700A combines the functions of a waveform monitor vectorscope automatic measurement set and noise measurement set in a single instrument Input signals can be broadcast or generated by test equipment The VM700A can be operated by using its front panel controls or by using one of the rear panel RS 232C ports or the GPIB port if Option 48 is installed to send it commands The VM700A can be operated as an NTSC standard instrument Option 01 a PAL standard instrument Option 11 or as a dual standard instrument when both options are included VM700A Option 01 NTSC amp Option 11 PAL User Manual 1 1 Section 1 Introduction and Specification The VM700A functions as a waveform monitor when its Waveform front panel button is pressed Waveform monitor operation is described in Section 4 The VM700A functions as a vectorscope when its Vector front panel button is pressed Vector scope operation is described in Section 5 When the Measure front panel button is pressed the VM700A displays a list of available measurements A general description of Measure mode operation is given in Section 6 Detailed information about individual measurements is included in the VM700A Option 01 NTSC Measurements Operator Manual and the VM700A Option II PAL Measurements Operator M
111. rtcuts are available to power up the VM700A and put it immediately into a specific mode Each of these shortcuts involves powering up the VM700A while pressing certain combinations of front panel keys To use a shortcut power down the instrument press and hold the indicated key s on the VM700A and power up Hold the keys for approximately 3 seconds after powering up to select the desired mode Table 9 5 summarizes shortcuts and the keys that enable them Table 9 5 Start Up Shortcuts Front Panel Key s Mode Effect Waveform Quick Start Ignores all diagnostics Auto Auto Reset Forces all diagnostics to run Help Low Level Debug Allows serial interface with low level diagnostics Measure High Level Debug Allows access to individual diagnostics and diagnostic measurements and to Configure Configure Cal T Pnl Runs Touch Panel Calibration u Waveform Auto Clear File System Clears NVRAM file system a When you start up in Clear Filesystem mode this message appears VM700A Opti on 01 NTSC amp Option 11 PAL User Manual Section 9 Diagnostics CLEAR NVRAM FILESYSTEM Ready to clear nvram0 filesystem on EPROM NVRAM board at base address 0x44000000 Reset instrument to Abort or Press C key to Continue Powering down the VM700A at this point aborts the Clear NVRAM Filesystem procedure Pressing the C front panel button clears the NVRAM file system Getting Technical Su
112. s timed events setup files the works Any files you may wish to use later should be backed up to a PC disk using remote operations capability of the VM700A and a utility such as VM BACKIT before this option is invoked When you choose the Clear NVRAM Filesystem option the following message appears on the computer terminal screen 9 12 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 9 Diagnostics CLEAR NVRAM FILESYSTEM Ready to clear nvram0 filesystem on EPROM NVRAM board at base address 0x44000000 Reset instrument to Abort or Press a Terminal key to Continue Powering down the VM700A at this point aborts the Clear NVRAM Filesystem procedure Pressing any key on the computer terminal keyboard clears the NVRAM file system 1 CPU board 2 Display FP board 3 Main ROM board these selections run the specified low level diagnostics in a manner similar to the Interactive mode of user selectable diagnostics Upon completion of each test the VM700A pauses with the prompt message Press a Terminal key to continue While each low level diagnostic runs in Debug mode the terminal display is nearly identical to the corresponding VM700A display during a normal non Debug mode power up When the diagnostic routine completes all its tests the terminal displays the Debug mode main menu once more H High Level Debug mode powers up the VM700A without running any diagnos
113. s Lines 4 3 Support Functions 2 4 Configure and Function 2 5 Copy 2 5 Help 2 5 Menu 2 5 Sync Change Sampling 4 8 External Sync 4 7 Locked to Source 4 7 Sound in Sync PAL only 4 7 Sync A B C 4 7 Sync source 4 7 sync loop through 2 6 system line 4 3 5 4 T tilde 3 4 Time 3 2 3 9 time and date setting 3 9 Timed Events 3 21 Timed Events file 8 5 timed events file creating 3 23 deleting 3 23 timed execution 3 24 touch and zoom 4 4 Touch Screen Calibrating 2 2 touch screen 2 3 tree 3 4 V Vector 75 Bar Cal 5 3 Angle deg readout 5 2 Burst in Ch A B C 5 3 Burst in Source 5 3 Burst Reference 5 3 calibrated state 5 3 Change Setup NTSC only 5 3 color bar signal 5 1 Display Select V PAL only 5 2 Field n Line nn NTSC Line n PAL 5 4 VM700A Option 01 NTSC amp Option 11 PAL User Manual Index Field Toggle 5 4 Find Colorbars 5 4 Menu 5 2 Noise 5 3 V Axis Switch PAL only 5 2 Vector Line 5 4 Vector Gain 5 2 Vector mode display 5 1 Vertical interval automatic scan 8 4 Video Source 3 10 Video Source Identification Number inserting 3 25 Violated Limits 8 2 VM700A Option 01 NTSC amp Option 11 PAL User Manual VMBKUB 1 1 VMRMGR 1 1 VMtTerminal 1 1 Volts scale 4 4 W Waveform 4 1 waveform expansion 2 5 Waveform mode menu 4 6 Waveform Positioning 2 5 Index 5
114. s below the directory window Type the new text keeping the following things in mind a Typing always inserts characters at the cursor position The cursor can be moved left or right by turning the control knob b To delete characters move the cursor to the right of the character to be deleted then press the Back Space key c Pressing the Set1 soft key allows you to enter numerals and punctuation characters Pressing the Set2 soft key allows you to enter various special characters Pressing the Shift key allows you to enter uppercase characters or more punctuation characters in the case of the shifted versions of Set1 Both the Set1 and Set2 character keys and the Shift key lock when selected Set1 and Set2 are unlocked by touching the same key again or touching the unselected key of the pair Shift is unlocked by touching Shift again d Touch Cancel to quit the editing process without entering the new text e Touch Done when you are finished to enter the new title line text To Change a Parameter in a File Use the control knob to scroll the line containing the parameter use wish to change to the center of the display window The active line to edit is highlighted made brighter VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 7 Section 3 Configuring the VM700A Printing Files 3 8 Touch the parameter in the highlighted line you wish to change A box appears around the selected parameter Rotate the c
115. s on the Selected side execute at power up To select or unselect a diagnostic from the Diagnostics Selection file 1 Press the Configure button Press the Configure Files softkey Select the Diagnostics Selection file Bow m Turn the knob until the diagnostic s name is highlighted Touching the vertical center of the left half of the screen selects the highlighted diagnostic touching the vertical center of the right half unselects it 5 Press the Update amp Exit softkey to write out save any changes to the file press the No change amp Exit softkey to leave the file as it was when it was last saved Bypassing Power Up To bypass all power up diagnostics both low level and high level press and Diag nostics hold the Waveform button when you switch the VM700A on If the VM700A is being started cold hold the button for three to five seconds if the VM700A is already warmed up one or two seconds should do it 1 The AudioProcessor Diagnostic and AudioAnalog Diagnostic selections are available only with the VM700A Audio option GPIB Diagnostic is available only when Option 48 the GPIB Interface is installed Refer to the Option 48 Programmer s Reference manual for diagnostic information 9 8 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 9 Diagnostics The VM700A displays the message INITIALIZING IN QUICK START MODE then proceeds with system initialization To bypass individu
116. se these files Use the Create File softkey to copy the contents of one of the supplied files to create a limit file you can customize The first line of the file is the title line The second line of the file 2 consecu tive error s before reporting sets the number of times the VM700A must make consecutive measurements of a value that is outside the Alarm Limits before logging the error to the printer To change the consecutive error s before reporting value 1 Rotate the control knob to scroll the screen and highlight the 2 consecutive error s before reporting line 2 Touch the number at the front of the line 3 Rotate the control knob to select either 1 2 or 3 4 Select the Accept Input softkey or touch the screen inside the directory window other than the selected parameter box to return the control knob to its scrolling function To change a Caution or Alarm Lower or Upper Limit 1 Rotate the control knob to scroll the screen and highlight the line with the limit you wish to change 2 Touch the limit you wish to change or remove 3 Scroll the control knob to display the desired value or select Make it undefined if you wish to remove the limit VM700A Option 01 NTSC amp Option 11 PAL User Manual 8 3 Section 8 Auto Mode 84 Defining Measurement Locations Selecting a Group of Measurements 4 Select the Accept Input softkey or touch the screen anywhere inside the directory window other than
117. sing on the cursors VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 4 Waveform Mode Select Lock Left and move the waveform to the left one full cycle two zero crossings and position the zero crossing on the right cursor Select Lock Right The sine wave frequency is now displayed in the Frequency 1 T readout Compare this value with the freq MHz value in the first cursor status line third line from the bottom in the status area Using Cursors to Measure The Cursors mode provides a quick tool to make amplitude measurements and Amplitude indicates measurement results in the same units as the vertical scale to three decimal places The following example discusses the Vertical delta readout and its use in measuring amplitude of the color burst Valta IRE FLT 5 4 60 0 0 2 a 1 a a 1 a j4 pM i E 2 0 10 0 12 0 Noise reduction 10 79db Micrefecenda APL 100 0 Precision Mode Off 525 line NTSC Ns Filtering Syr chronsua Syne Source Slew clamp to 0 00 V at 6 63 us Framea selected 1 2 Sine pk pkimv 286 freq MHz 3 58 offaetim 7 Time from L to R 0 000 MicreSeconda Vertical delta 0 000 Volta Frequency 1 T UNDEFINED UNDEFINED amp point Center Lock Center Leck Reset Reset Curasra Left Left Right Right Curacra Diffa Stay Un Figure 4 4 Color burst aligned with horizontal reference line VM700A Option 01 NTSC amp Option 11 PAL User Manual 4 15 Section 4 Wavef
118. sor Status Lines 4 11 Cursors 4 6 4 11 Center Left Right 4 6 Cursors Stay On 4 7 Lock Left Right 4 6 Measure Frequency 4 14 Measure Timing 4 12 Measuring Amplitude 4 15 measuring rise time 4 12 Reset Cursors 4 6 Reset Diffs 4 7 D DC Coupling 4 9 Debug 1 CPU board 9 13 2 Display FP board 9 13 3 Main ROM board 9 13 A Auto Reset mode 9 11 C Clear the Filesystem NVRAM 9 12 D Run the Debugger 9 12 H High Level Debug mode 9 13 N Normal Power Up mode 9 11 Index 1 Index Q Quick start mode 9 11 serial port setup 9 13 T Calibrate the Touch Panel 9 11 Debug mode 9 10 Diagnostic Change Run Mode 9 10 Continue 9 9 Interactive Mode 9 9 Loop On Test 9 10 PowerUp Mode 9 9 Rerun Test 9 10 Diagnostic Errors 3 17 9 6 Diagnostic Errors file 3 17 9 15 Diagnostic Measurements 9 6 diagnostics 9 1 Diagnostics Selection 3 17 Diagnostics Selection File 9 7 Diagsloop 9 10 Diff Step Filter 4 9 directory 3 4 entering 3 4 leaving 3 4 Directory Structure 3 3 3 10 directory tree 3 4 Display 4 1 Display and Graticule Intensity 5 2 Display Intensity 2 6 4 4 Display Phase Angle 5 2 DTE to DCE cable 2 8 DTE to DTE cable 2 8 E editable files creating 3 5 storage 3 5 supplied 3 5 editing a file 3 6 editing keyboard 3 7 Enabling Disabling Logging 8 2 Entering Debug Mode 9 10 Environmental Characteristics 1 3 EPSON LO 570 printer 2 9 Ev
119. ssing the Cursors soft key brings up the following submenu Center Left Right centers the left or right vertical cursor on the screen If the cursor is locked to the waveform the two will move together If the left and right cursors overlie each other they appear together as a single dotted line The vertical amplitude reference marker positions are reset if the cursor is unlocked Lock Left Right locks the left or right vertical cursor to the waveform so that the cursor and waveform move together The cursor may be moved anywhere within a frame The Time from L to R reading indicates the time interval between the left solid cursor and right dashed cursor The Frequency reading is the reciprocal of the time 1 T and is useful when the cursors are aligned to exactly one period of a waveform The amplitude reference markers associated with the cursors are not displayed when both cursors are locked to the waveform NOTE If you position the left solid cursor to the right of the right dashed cursor you will be measuring the time from one frame to the next Reset Cursors unlocks the left and right vertical cursors from the wave form and positions both at the center of the display The amplitude reference markers are also reset so moving the waveform to the 0 and 100 positions of the waveform again pushes the amplitude reference markers back to those positions on the waveform You can then adjust the cursor on the
120. t Cursors soft key is touched The values in the first Cursor status line are measured at the center of the display The message Sine wave at middle of screen has frequency above 1 5 x Subcarrier not measurable is displayed when no sine wave is found at the center This condition occurs when measuring noise VM700A Option 01 NTSC amp Option 11 PAL User Manual 4 11 Section 4 Waveform Mode and when the signal frequency is actually too high to measure The formula used for calculating the Sine pk pk mV freq MHz and offset mV values is f t A sin Xt B where A pk pk 2 X 2xfreq and B offset The second and third cursors status lines display values relative to the cursor positions and to the horizontal reference line Moving Cursors Lock Left When cursors are displayed a cursor can be moved from its default position in Lock Right Center Left the middle of the display by locking it to a point on the waveform Use the and Center Right control knob to position the waveform under the cursors then lock one of the cursors with the Lock Left or Lock Right soft key You can now move both cursor and waveform horizontally If the Left or Right cursor is moved off the screen and lost from view it can be easily brought back on the display by selecting the Center Left or Center Right soft key as appropriate With a cursor locked to the waveform selecting the corresponding Center soft key will horizontally center the c
121. t settings for the Copy Report Log and Remote Control ports are Epson LQ PostScript ASCII Printer HP LaserJet HP DeskJet and HP ThinkJet If you have an Epson LQ PostScript compatible or HP LaserJet printer you can use the Copy function to capture any VM700A display from the Waveform Vector Picture Measure or Auto modes If you have only an ASCII printer available set Copy Format to ASCII Printer Then the Copy function is enabled only in Auto mode which displays only text If the Copy button is pressed in Waveform Vector Picture or Measure modes when Copy Format is set to ASCII Printer the VM700A will beep indicating the Copy function is not available To change a Port or Format Assignment Select the parameter you wish to change by rotating the knob until the parameter is highlighted then touching the screen over the parameter value Rotate the control knob until the desired parameter value appears Press the Accept Input soft key or Touch the screen anywhere inside the window then press the Update amp Exit soft key to save the changes Port Configuration Two groups of eight lines appear in the Communication Setup file after the lines that control port and format assignments These two groups constitute the port configuration lines of the Communication Setup file These lines control the formatting of data when the VM700A is being operated remotely and when it is being used to control a remote device on the Control
122. teractive control of measurement parameters as well as graphical display and digital readouts of measurement results Measure Mode Menu Operation Measure mode is used for making interactive measurements of NTSC and PAL signal properties and accessing the measurements of any installed options as shown in Figure 6 1 This is different from Auto Mode which is used for automatic non interactive and continuous execution of user specified measure ments NTSC and PAL video measurements available through Measure mode are described in detail in the VM700A Option 01 NTSC Measurements Manual and the VM700A Option 11 PAL Measurement Manual The Video Option and Audio Option measurements are described in the individual option operator s manuals In nvramO E xecutable F iles Video O ptions Timing Camera_Testing p Echo_Rounding Teletext Video Previous Leave Video Audio Diags Options Selection Directory Note In the first Measure mode menu display the Video soft key is visible when Video Options are selected and the Video Options soft key is visible when when Video is selected The Audio soft key is seen only if Audio Options are installed Figure 6 1 Typical Measure Mode menu choices VM700A Option 01 NTSC amp Option 11 PAL User Manual 6 1 Sect
123. tests include filter ID and frequency response sub tests The filter ID sub test checks instrument firmware to determine the TV standard and release version This information is used by the diagnostic to determine valid filter IDs for each slot The frequency response sub test generates a psuedo square wave signal by switching channel input between A and B with each channel input clamped to a different DC level The signal is routed through the filter slot under test to the ADC acquired and analyzed Discrepancies are displayed on screen When an empty Slot is correctly identified this test displays NA 4 Each gating pattern has a different number of active video lines so the ratio of the NTSC pattern cal factor to always on pattern equals the ratio of NTSC pattern active lines to the always on pattern number Likewise for PAL b Range is the arithmetic sum of the measured bit weights and bit weights are measured as the effect of toggling only the indicated bit VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 9 Diagnostics Diagnostic Measurements Power Up Diagnostics 9 6 Table 9 3 lists and describes the VM700A diagnostic measurements These measurements can only be run individually Table 9 3 Diagnostic Measurements Test Name Description AdcGain Adjustment Verifies that the Genlock status register correctly represents the hardware configuration These tests must pass to run the loc
124. tics and takes you straight to the nvram0 VM700A Diagnostics directory From this point you can run any diagnostic or use the soft keys to get to the Console or Diagnostic Error files NOTE If you want to use the VM700A after running it in High Level Debug mode power the instrument down and start it back up again normally to guarantee that all internal constants set during the power up procedure are correct Serial Port Setup for In Debug mode the low level diagnostics use the four possible settings of two Low Level Diagnostics jumpers on the AS CPU board to determine the transmit and receive baud rates Debug Mode when the instrument is initialized Table 9 4 specifies the baud rates available with these jumpers VM700A Option 01 NTSC amp Option 11 PAL User Manual 9 13 Section 9 Diagnostics Table 9 4 A5 CPU Board Jumper Settings Jumper 1 J308 Jumper 2 J307 Transmit Baud Rate Receive Baud Rate On If settings are stored in non volatile memory Commu nication Setup file they are used Otherwise both transmit and receive defaultto 19200 baud On Off 19200 19200 of On 300 19200 of lot 300 300 Note that whenever you use one of the non default jumper states such as J307 or J308 set to OFF the following communication parameter settings are used Protocol None Character size 8 Flow control XON XOFF Parity None Reset character None Start Up Shortcuts Several sho
125. to go through one complete cycle of selected measurements when a getresults command has been sent from a remote or when a getresults request is part of a Function Key operation One file with an appropriate name Auto Bar LineTime etc is written for each Measure mode measurement or for Auto mode when it is exited If a file with that name existed previously the old file is overwritten Once a Measurement Results file contains results it can be printed by selecting the Print File soft key renamed deleted or viewed Password File The VM700A can be configured to require a password for permission to create rename edit and delete directories function keys and files When the Password function is enabled a Password file appears in the Configure_Files directory To initially set a Password Select touch the Password file Touch the screen to the right of the text Password Type in the new password up to 15 characters Press Return or Done and select the Update amp Exit soft key to put the new password into effect or press Cancel or Exit to leave without changing the new password NOTE Enabling the Password function requires partial removal of the left side cover of the VM700A Refer the instrument to a qualified service person to either change the Password enabled disabled state or to reset the password should it become unknown for some reason VM700A Option 01 NTSC amp Option 11 PAL User M
126. tory press Configure and then touch the Configure Files soft key and contains parameter settings for both ports Configuring the Communication Setup file is covered in Section 3 Configuring the VM700A The following list describes the signals the VM700A outputs and the input signals required on all the active pins of the serial ports Pin 1 Chassis Ground Pin 2 TX Transmit Data The VM700A transmits data on this pin Pin 3 RX Receive Data The VM700A receives data on this pin Pin 4 RTS Request To Send data to the VM700A With Flow Control CTS RTS selected normally RTS connects to the CTS line of a terminal and the line is active when the VM700A is ready to receive data When the receive buffers of the VM700A are nearing VM700A Option 01 NTSC amp Option 11 PAL User Manual 2 7 Section 2 Installation and Operation capacity RTS goes inactive indicating to the sending device to stop transmitting data With Flow Control None or XON XOFF selected RTS is always active Pin 5 CTS Clear To Send With Flow Control CTS RTS selected the VM700A is enabled to transmit data by a high level on pin 5 and is disabled by a low level It is normally connected to the RTS line of a terminal With Flow Control None or XON XOFF selected the VM700A transmits data regardless of the CTS level Pin 7 Signal Ground Pin 8 CD Carrier Detect This signal typically comes from a modem and indicates t
127. tory to provide Auto mode with a list of measurements to be made as well as the limits for those measurements The first line of each file in the Auto_Limit Files directory is the title line for identification of the file The second line sets the number of consecutive times the VM700A must find a value outside either of its Alarm limits before sending a report of the error to the Log Port NOTE All Cautions and Alarms encountered in Auto mode are displayed on the VM700A screen but only Alarms equal to or exceeding the consecutive errors number specified in the active Auto Limits file are sent to the Log port To Change the Consecutive Error s Before Logging Value Rotate the control knob to scroll the screen until the consecutive error s before logging line is highlighted Touch the number at the front of the line Rotate the control knob to select either 1 2 or 3 Select the Accept Input soft key or touch the screen anywhere inside the directory window to return the control knob to its scrolling function The next two lines after the consecutive errors before logging line contain non editable label information Each line of the rest of the file lists the name of an Auto mode measurement along with its lower and upper Caution limits and its lower and upper Alarm limits To Change the Lower or Upper Limit of a Caution or Alarm Rotate the control knob to scroll the screen until the line with the limit you wish to change is
128. trument cabinet to access internal switches It should be performed only by a qualified service person To force Debug mode when front panel buttons are inoperative 1 Switch the VM700A power off 2 Remove the VM700A from the equipment rack if rack mounted 3 Remove the two screws from the rear panel that retain the left side cover viewed from the front of the instrument 4 Slide the left side cover about two thirds of the way back 5 On the A5 CPU board bottom board locate the six section DIP switch with the markings FACIMODEI printed on the circuit board in front of it 6 Set the three rightmost switches nearest the front of the instrument to the UP position to enable Debug mode 7 Power up the VM700A Diagnostic information is redirected to serial port 0 To change Debug mode output to PORT 1 Set the switch above the C on the FACIMODEI DIP switch to the UP position Running Remote When the VM700A first enters Debug mode the following menu appears on the Diagnostics in Debug terminal screen as shown in Figure 9 2 Mode The following options are available from within Debug mode by pressing the indicated key N Normal Power Up mode causes the VM700A to initialize as though the instrument was just powered up This mode runs the low level diagnos tics starts the operating system then runs all high level diagnostics specified in the Diagnostics Selection file A Auto Reset mode exec
129. ursor and the point on the waveform to which it is locked This technique may be used to toggle between any two points in a frame Using Cursors to Measure Cursors can help you make extremely accurate time measurements over short or Timing very long intervals For example you can measure rise times or the length of up to two fields of video To familiarize you with cursors the following text explains how to measure the rise time of the leading edge of horizontal sync While learning to use cursors you ll find it much easier to use the stable output of a test signal generator than live video You can also select Freeze to stabilize the signal Note that the VM700A bandwidth limits the signal to 6 MHz To accurately display rise times of signals with significant frequency components between 5 MHz and 6 MHz select Precision mode To Use Cursors to Measure a Rise Time First use the control knob and the Vertical Horizontal buttons to position the leading edge of a sync pulse in the center of the screen and then expand the sync edge to fill 8096 of the screen Select the Reset Cursors soft key to center the cursors reset the amplitude reference markers and turn off any previously selected cursor Lock soft keys Attach the left amplitude reference marker to a stable spot on the blanking level prior to the leading edge of sync by moving the waveform to the right until the blanking level reaches the cursor This establishes the 100 point of sync
130. utes all user selectable diagnostic routines regardless of the state of the Diagnostics Selection file This mode operates just like Normal Power Up Mode except all high level diagnostics are run Q Quick start mode initializes the VM700A or attempts to without running any diagnostics low or high level T Calibrate the Touch Panel runs a routine that calibrates the touch screen to compensate for changes in thermal environment VM700A Option 01 NTSC amp Option 11 PAL User Manual 9 11 Section 9 Diagnostics LOW LEVEL DEBUG MODE Key Selection Press one of the indicated keys N Run Instrument in NORMAL Power Up mode A Run Instrument in AUTO RESET mode 0 Run Instrument in QUICK START mode T Calibrate TOUCHPANEL D Run DEBUGGER C CLEAR FileSystem Nvram 1 Do CPU BOARD Diagnostic 2 Do DISPLAY FP BOARD Diagnostic 3 Do MAIN EPROM NVRAM BOARD Diagnostic H Run Instrument in HIGH LEVEL DEBUG mode Reprint Menu Press on of the indicated keys Figure 9 2 Debug mode terminal screen display D Run the Debugger runs a troubleshooting aid Intended for qualified service personnel only C Clear the Filesystem NVRAM restores file system to original factory condition WARNING The Clear NVRAM Filesystem option deletes all user created files function
131. uts generated by the Configure mode s Print File soft key are sent Report the port to which Timed Event reports are sent Log the port to which error reports are sent Errors are logged when the VM700A running in Auto mode measures a parameter as being out of specification for more than the number of consecutive times designated in the active Auto Limits file Control the port used to connect a device to be controlled by the VM700A A typical example is the ASG 100 audio signal generator under control of the VM700A running Function Key commands that generate test signals for the Option 40 audio measurements Remote Control the port used to connect the VM700A to a modem terminal or PC for remote operation See the VM700A Programmer s Reference Manual for details on remote operation Copy Report Log Format should be set to match to type of printer connected The first five groups of lines of the Communication Setup file after the title line assign a physical port and a format to each logical port VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 15 Section 3 Configuring the VM700A 3 16 Possible Port settings for the Copy Report Log Control and Remote Control ports are Serial Port 0 Serial Port 1 and None Giving a port a setting of None disables the logical port s function e g setting the Copy port to None means that no screen dump will be produced when you press the Copy button Possible forma
132. utton activates the Help function When Help is turned on pressing a button or selecting a soft key displays a brief explanation of the button or soft key all buttons and soft keys except Help lose their normal function The LED on the Help button flashes while Help is active Help is turned off by pressing the Help button a second time Configure and Function The Configure button and its usage are discussed in Section 3 Configuring the VM700A The Function button and its usage are discussed in the VM700A Programmer s Reference Manual Copy The Copy button sends a copy of the display to the print spooler tempo rary memory space to queue for printing The LED in the Copy button will flash as long as the copy remains in the spooler To delete the copy from the spooler press the Configure button while the Copy LED is flashing and select the Cancel Copy soft key This soft key only appears in the Configure menu when a copy is pending in the spooler Control Knob The specific functions of the control knob in each mode are described in the relevant sections of this manual as the function of the control knob depends on the current mode of operation Its general operation is described here Waveform Expansion and Positioning In Waveform mode rotating the control knob affects horizontal or vertical movement of the display or horizontal or vertical expansion of the display depending on the selections of the Move Ex pand button and the Horizont
133. waveform to the point as indicated by the of waveform readout VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 4 Waveform Mode between the 0 and 100 points required for the cursor measurement e g 50 or 10 and 90 Reset Diffs resets the Vertical Delta readout to 0 0 at the current vertical position Any subsequent vertical displacement from the knob is displayed This capability is useful for measuring signal amplitudes The horizontal marker line across the middle of the active waveform area provides a useful reference level to align the waveform for voltage difference measurements Cursors Stay On keeps the cursor graphics up even when not in the Cursors submenu This is useful for keeping up sine wave measurement results which measure the amplitude frequency and offset of a sine wave in the center of the displayed area Sync This choice allows selection of Sync source A B C External or Locked to Source sync mode Also selects Sound in Sync mode and genlock mode selection between synchronous asynchronous and free run modes If incorrectly set for the input signal the waveform display may be replaced by the message lt Loss of sync gt Pressing the Sync soft key brings up the following submenu Sync A B C sets the sync source to input channel A B or C and clears un highlights the Locked to Source soft key will NOT change with changing input selections result
134. with a start bit pulse at the default location of 26 usec after the leading edge of sync You can change the start value in the Measurement Locations file but it should be an even number between 26 and 52 usec When a start pulse is found the VM700A checks that no part of the waveform preceding the start pulse is more than one half the bar amplitude If part of the waveform preceding the start pulse is more than one half the bar amplitude the encoded number is rejected Encoding always ends with a stop pulse whose trailing edge is at 57 usec The start and stop pulses are not used in the encoding scheme There are a maximum of 14 pulses between the start pulse and end pulse which are used to represent a binary number The pulse following the start pulse is the least significant bit and the pulse preceding the stop pulse is the most significant bit VM700A Option 01 NTSC amp Option 11 PAL User Manual 3 25 Section 3 Configuring the VM700A 3 26 VM700A Option 01 NTSC amp Option 11 PAL User Manual Section 4 Waveform Mode Section 4 Waveform Mode Introduction Display Waveform Graticule This chapter describes the capabilities of the VM700A as a waveform monitor and how the user interface controls its operation It is divided into three topics Display features which discusses basic characteristics of a Waveform mode display Menu which contains information on all the functions and controls accessed through
135. work use free run mode In free run mode line or field syncs are not used and you lose TV timing references The Noise choice sets the decibel value for noise reduction Highlight the soft key and rotate the knob to change the decibel value Noise reduction is enabled with the Average button Noise reduction up to 30 1 dB in 3 01 dB steps is available Larger noise reduction settings require a longer settling period Pressing the Extra Functions soft key brings up the following submenu Gain allows direct control of the hardware used in acquisition Gains of 0 25 to 7 75 in steps of 0 25 are available A larger gain gives a smaller input range but more resolution The input range is indicated by two horizontal cursors Signals beyond these cursor levels are clipped Offset used to bring the signal inside the cursors that appear when the Manual Gain mode is on Otherwise hard clipping may occur Manual Gain selects control of the input gain and offset used from the other soft keys in this submenu When deselected normal automatic gain control is in effect When highlighted two horizontal cursors appear in the waveform area showing the limits of the input range before hard clipping occurs Screen Memory When highlighted causes screen erasures to cease allowing a build up of displayed waveforms This is useful for looking at eye heights jitter or abnormal excursions of the signal over a period of time The screen is cleared

Section 6:Measure Mode - Advanced Test Equipment Rentals

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