Agilent Technologies 83480A User's Manual
Contents
1. 5 000 ns div 75 0 mU div 10 0 mu 1 Figure 1 7 Single choice softkey selection Eguipment Used in These Exercises 2 3 Exercise 1 Installing a Plug in Module 2 4 Exercise 2 Turning On the Instrument 2 5 Exercise 3 Connecting a Signal 2 6 Exercise 4 Finding the Signal 2 7 Exercise 5 Modifying the Setup 2 8 Exercise 6 Making Measurements on the Signal 2 13 Exercise 7 Using the Help Menu 2 17 Operating the Instrument Operating the Instrument Operating the Instrument Operating the Instrument This chapter contains several exercises that will familiarize you with the oper ation of the instrument Exercises 1 3 show how to get the instrument up and running Exercises 4 and 5 demonstrate the vertical horizontal and trigger menus by having you display a signal and then use the channel and time base menus to expand the signal Exercise 6 shows you how to use the markers and automatic measurement features to make a pulse width and voltage amplitude measurement Exercise 7 introduces you to the Help menu You will find it easier to perform these exercises if you are at least a little familiar with how to use the front panel The best way to learn how to use the front panel is to read Chapter 1 Introducing the Instrument Note Clean the cabinet using a damp cloth only 2 2 Operating the Instrument Eguipment Used in These Exercises Eguipment2. The Agilent 83480A Agilent 54750A At a Glance The Agilent 83480A series digital communications analyzer or Agilent 54750A series digitizing oscilloscope are modular high performance mainframes that contain digitizers timebases and display circuitry behind vertical channel plug in modules containing samplers IF amplifiers power monitoring circuitry and O E converter Agilent 83485A The Agilent 83480A series digital communications analyzer include these unique capabilities e A full range of custom and standard telecom and datacom masks and tem plates with automated conformance and margin testing e Automated extinction ratio and q factor measurements e The ability to set the timebase display to bit period select the appropriate telecom bit rate and enter the number of bits to be displayed If you wish to add these capabilities to an Agilent 54750A series digitizing oscilloscope or use the Agilent 83485A optical plug in module a firmware upgrade must first be installed Order the Agilent 83480K communications firmware kit and follow the installation instructions NOTE The Agilent 83480A and Agilent 54750A mainframes do not accept plug in modules designed for use with the Agilent 54710A and Agilent 54720A The instrument also has software modularity by having a 3 1 2 inch disk drive and flash ROMs to allow for simple firmware upgrades of the firmware fea tures The plug in modules provide optical and elec
3. For continued protection against fire hazard replace line fuse only with same type and ratings type T 0 315A 250V for 100 120V operation and 0 16A 250V for 220 240V operation The use of other fuses or materials is prohibited Verify that the value of the line voltage fuse is correct iv CAUTION CAUTION CAUTION CAUTION CAUTION CAUTION CAUTION General Safety Considerations Before this instrument is switched on make sure its primary power circuitry has been adapted to the voltage of the ac power source Failure to set the ac power input to the correct voltage could cause damage to the instrument when the ac power cable is plugged in This product is designed for use in Installation Category I and Pollution Degree 2 per IEC 1010 and 664 respectively VENTILATION REQUIREMENTS When installing the product in a cabinet the convection into and out of the product must not be restricted The ambient temperature outside the cabinet must be less than the maximum operating temperature ofthe product by 4 C for every 100 watts dissipated in the cabinet If the total power dissipated in the cabinet is greater than 800 watts then forced convection must be used Always use the three prong ac power cord supplied with this instrument Failure to ensure adequate earth grounding by not using this cord may cause instrument damage Do not connect ac power until you have verified the line voltage
4. chapter provides suggestions for you to follow if the mainframe or plug in module fails to operate For a complete listing of display messages refer to the Agilent S8480A 54750A User s Guide For complete service information refer to the optional Agilent 834804 54750A Service Guide Review the procedure being performed when the problem occurred A few minutes spent performing some simple checks before calling Agilent Technol ogies or returning the unit for service may save waiting for your instrument to be repaired Electrostatic discharge ESD on or near input connectors can damage circuits inside the instrument Repair of damage due to misuse is not covered under warranty Before connecting any cable to the electrical input momentarily short the center and outer conductors of the cable together Personnel should be properly grounded and should touch the frame of the instrument before touching any connector Refer to the Agilent S3480A 54750A User s Guide for further information regarding ESD 3 2 In Case of Difficulty If the Mainframe Does Not Operate If the Mainframe Does Not Operate If the mainframe does not operate check the following Is the line fuse good Does the line socket have power Is the unit plugged in to the proper ac power source Is the mainframe turned on Is the rear panel line switch set to on Will the mainframe power up without the plug in module installed If the mainframe still doe
5. in module 2 4 instant action key 1 5 instrument description 1 1 settings 1 5 L Level softkey 1 8 line voltage switch 2 5 list softkeys 1 9 Index 1 Index M manual marker measurements 2 15 manual softkey 2 13 Marker key 2 13 measuring the signal 2 13 menu display 1 6 key 1 5 softkeys 1 7 messages on display 3 2 milli key 2 9 mode softkey 2 13 modifying the setup 2 8 O offset 2 16 adjustment 2 4 Offset softkey 2 9 optical electrical plug in module 2 3 P plug in module 2 8 installing 2 4 Position softkey 1 8 2 11 power cord 2 5 pulse frequency 2 6 generator 2 3 2 6 level 2 6 R rear panel connector 2 5 line switch 2 5 Reference softkey 2 12 repetitive signals 2 7 Run key 1 5 3 4 S safety iiv laser classification iiv scale increments 2 8 Scale softkey 1 8 2 8 2 10 Setup key 2 6 setup modification 2 8 Shift key 1 9 signal connection 2 6 markers 2 8 measurement 2 13 single choice softkeys 1 10 softkey overview 1 6 square wave signal 2 6 Sweep softkey 1 6 3 4 System configuration softkey 3 5 T Time base key 1 5 time base scale 1 9 toggle softkeys 1 6 trigger display 2 7 level 2 6 signal 2 6 Trigger key 1 5 1 6 3 4 triggered softkey 3 4 troubleshooting 3 2 3 5 turning on the instrument 2 5 U Undo Autoscale key 2 7 unit of measure 2 9 using the front panel 1 4 1 10 Utility key 1 4 3
6. is expressed or implied Agilent Technologies specifically dis claims the implied warranties of merchantability and fitness for a particular purpose Exclusive Remedies The remedies provided herein are buyer s sole and exclusive remedies Agilent Technolo gies shall not be liable for any direct indirect special inci dental or consequential dam ages whether based on contract tort or any other legal theory Safety Symbols CAUTION The caution sign denotes a hazard It calls attention to a procedure which if not cor rectly performed or adhered to could result in damage to or destruction of the product Do not proceed beyond a cau tion sign until the indicated conditions are fully under stood and met WARNING The warning sign denotes a hazard It calls attention to a procedure which if not cor rectly performed or adhered to could result in injury or loss of life Do not proceed beyond a warning sign until the indicated conditions are fully understood and met The instruction man A ual symbol The prod uct is marked with this warning symbol when it is necessary for the user to refer to the instructions in the manual The laser radiation symbol This warning symbol is marked on products which have a laser output The AC symbol is used to indicate the required nature of the line module input power The ON symbols are used to mark the posi tions of the instrument power line
7. is correct Damage to the equipment could result This instrument has autoranging line voltage input Be sure the supply voltage is within the specified range Electrostatic discharge ESD on or near input connectors can damage circuits inside the instrument Repair of damage due to misuse is not covered under warranty Before connecting any cable to the electrical input momentarily short the center and outer conductors of the cable together Personnel should be properly grounded and should touch the frame of the instrument before touching any connector Contents General Safety Considerations iiv Introducing the Instrument The Agilent 83480A Agilent 54750A At a Glance 1 2 A Quick Tour of the Front Panel 1 4 Operating the Instrument Operating the Instrument 2 2 Equipment Used in These Exercises 2 3 Exercise 1 Installing a Plug in Module 2 4 Exercise 2 Turning On the Instrument 2 5 Exercise 3 Connecting a Signal 2 6 Exercise 4 Finding the Signal 2 7 Exercise 5 Modifying the Setup 2 8 Exercise 6 Making Measurements on the Signal 2 13 Exercise 7 Using the Help Menu 2 17 In Case of Difficulty In Case of Difficulty 3 2 If the Mainframe Does Not Operate 3 3 If the Plug in Does Not Operate 3 4 Contents 1 Entry devices 1 4 Disk drive 1 4 CAL signal 1 4 Hardkeys 1 5 Display 1 5 Softkeys 1 6 Introducing the Instrument Introducing the Instrument The Agilent 83480A Agilent 54750A At a Glance
8. the Autoscale key 2 7 Operating the Instrument Exercise 5 Modifying the Setup Exercise 5 Modifying the Setup The purpose of this exercise is to snow you the Channel and Time Base menus Changing the vertical scale To display the Channel menu and change the vertical scaling press Channel located on the plug in module Scale Change the scaling so the vertical height of the signal is about eight divisions using the knob arrow keys or keypad Selecting Fine mode When the knob and arrow keys are not in the Fine mode they change the scal ing in a 1 2 5 sequence You can change the scaling in 1 mV increments by using the keypad or by setting the knob and arrow keys to the Fine mode To set the instrument to the Fine mode press Shift Fine The word FINE appears at the top right corner of the display area when the fine mode is activated 2 8 Operating the Instrument Exercise 5 Modifying the Setup Using the keypad When using the Agilent 83483A 54751A electrical plug in module the knob or arrow key changes the scaling from 50 mV div to 100 mV div in one step At 50 mV div the signal is clipped and at 100 mV div the signal is not expanded to take advantage of the full vertical size of the display In this case you can use the keypad to set the scaling to 75 mV div To set the scaling to 75 mV with the keypad type the number 75 on the keypad Then press milli for millivolts to select th
9. units decibel t 5 000 ns d v 1 75 0 miuz d v 10 0 mil Figure 1 4 Menu softkey selection Continuous softkeys A typical example of the continuous softkeys is Level It has a range of values that can be changed with the keypad arrow keys or knob Color grade is enabled Trigger trigger 4 120 0 os div 4 50 0 mU div 88 0 mU Trig Bandwidth bC 2 5 GHz Figure 1 5 Continuous softkey selection 1 8 Introducing the Instrument A Ouick Tour of the Front Panel Because the Trigger menu only has one of this type of softkey it is active when the menu comes up on the display You do not need to press the Level softkey when you want to change the trigger level However the Time base menu has at least two of this type of softkey Bit Rate Agilent 83480A only and Scale and Position In this case only one of the softkeys is active at a time To make the other softkey active you must press the corresponding softkey You can tell which softkey is currently active because it has a different colored back ground from the rest of the softkeys When using time base scale or channel scale the knob and arrow keys operate in two modes One mode is a 1 2 5 seguence while the other mode is a fine mode that allows you to make smaller incremental changes You activate the fine mode by pressing Shift on the keypad followed by pressing the arrow key with t
10. 2 227 19 for other agencies Warranty This Agilent Technologies instrument product is war ranted against defects in material and workmanship for a period of one year from date of shipment During the war ranty period Agilent Technol ogies will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility desig nated by Agilent Technolo gies Buyer shall prepay shipping charges to Agilent Technologies and Agilent Technologies shall pay ship ping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to Agilent Technologies from another country Agilent Technologies war rants that its software and firmware designated by Agi lent Technologies for use with an instrument will execute its programming instructions when properly installed on that instrument Agilent Tech nologies does not warrant that the operation of the instru ment or software or firmware will be uninterrupted or error free Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfac ing unauthorized modifica tion or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance No other warranty
11. 5 V V amptd key 2 15 vertical display 2 7 2 9 scale 2 16 voltage selection 2 5 WwW width measurement 2 14 X X1 Y1 Source softkey 2 13 Index 2 Index X1 X2 Position softkeys 2 14 X2 Y2 Source softkey 2 13 Y Y1 Y2 Position softkeys 2 14 Index 3
12. Agilent 83480A Digital Communications Analyzer Agilent 54750A Digitizing Oscilloscope Quick Start Guide vegy Agilent Technologies Copyright Agilent Technologies 2000 All Rights Reserved Repro duction adaptation or trans lation without prior written permission is prohibited except as allowed under copy right laws Agilent Part No 83480 90049 Printed in USA June 2000 Agilent Technologies Lightwave Division 1400 Fountaingrove Parkway Santa Rosa CA 95403 1799 USA 707 577 1400 Notice The information contained in this document is subject to change without notice Com panies names and data used in examples herein are ficti tious unless otherwise noted Agilent Technologies makes no warranty of any kind with regard to this material includ ing but not limited to the implied warranties of mer chantability and fitness for a particular purpose Agilent Technologies shall not be lia ble for errors contained herein or for incidental or conse quential damages in connec tion with the furnishing performance or use of this material Restricted Rights Legend Use duplication or disclo sure by the U S Government is subject to restrictions as set forth in subparagraph c 1 Gi of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 for DOD agencies and sub paragraphs c 1 and c 2 of the Commercial Computer Software Restricted Rights clause at FAR 5
13. L iS a o 8 ed ODODOODI J O OO Cla SG sz I T Menu Hardkeys Plug ins Figure 1 1 The front panel of the instrument Figure 1 2 shows the main areas of the display and how you can interpret some of the instruments settings from the display 1 5 Softkeys Introducing the Instrument A Ouick Tour of the Front Panel This column is the Status Area a Memory bar a softkey menu area A Aygs 16 Time base scale is set to 5 0 ns div Time base reference is set to the left of the graticule area Channel 1 is on and it is set to 75 mV div with 10 mV of 1 75 0 m div 10 0 my offset 2 60 0 m div 0 0 U E ve Time base position Channel 2 is on and it is set is set to 20 ns to 60 mV div with no offset 5 000 ns div Channel 3 and 4 are turned off 54750s13 cdr Figure 1 2 The instrument display The softkeys are to the right of the display and instead of placing a label on the softkey itself the label is actually located on the display next to the soft key These labels on the display are called menus and the menu being dis played depends on which key has been pressed For example pressing Time base brings up the Time Base menu while pressing Trigger brings up the Trigger menu There are five types of softkeys and there are some differences on how each type of softkey operates The five types of softkeys a
14. Used in These Exercises All of the pictures of the display in this book were generated using an Agilent 83480A with an Agilent 83483A 54751A electrical plug in module and the signal from the Agilent 8133A pulse generator If you are using a different plug in module or signal source your display and instrument settings may vary from the pictures in this book With the Agilent 83480A the Agilent 83485A optical electrical plug in module could also have been used In this case we would connect the signal to the electrical input of the Agilent 83485A 2 3 Operating the Instrument Exercise 1 Installing a Plug in Module Exercise 1 Installing a Plug in Module The purpose of a plug in module is to provide measurement channels includ ing sampling for the mainframe A plug in module scales the input signal sets the bandwidth of the system and allows the offset to be adjusted so the signal can be viewed The output of the plug in module is an analog signal that is applied to the A D converters inside the mainframe Slide the plug in module into either slots 1 and 2 or slots 3 and 4 Note The plug in module will not operate if plugged into slots 2 and 3 If the mainframe is already turned on you do not need to turn it off before you install or remove a plug in module After a plug in module is installed the mainframe identifies the plug in module and the slot in which it is installed Note In the examples to fol
15. ase 5 To display the Time Base menu and change the horizontal scale press Time base Scale Use the knob arrow keys or keypad to change the scaling so the horizontal width of the positive portion of the signal is about eight divisions 2 10 Operating the Instrument Exercise 5 Modifying the Setup Using the keypad 6 When the knob and arrow keys are not in the Fine mode they operate in a 1 2 5 seguence changing the scale from 5 ns div to 2 ns div in one large step You can use Fine mode so the knob and arrow keys adjust in smaller increments or you can use the keypad to enter a smaller value like 1 4 ns div Using the Position function 7 To horizontally center the signal on the display press Position The Position function moves the waveform horizontally on the display Posi tion is sometimes referred to as delay The reference point is indicated by an arrow at the bottom of the display as shown in Figure 2 3 Time base S cs Units FRE k u 1 400 nszd v Reference center t 1 400 ns div 23 3000 ns 1 75 0 mu div Figure 2 3 Signal horizontal display Operating the Instrument Exercise 5 Modifying the Setup Setting the reference 8 To set the reference to the left or center of the graticule area press Reference 2 12 Operating the Instrument Exercise 6 Making Measurements on the Signal Exercise 6 Making Measurements
16. aveforms to a file or loading new system firmware MS DOS is a registered trademark of Microsoft Corporation The CAL signal is a dc voltage level used during the calibration routines It is internally generated and only activated during calibration routines It can be controlled by the user by pressing Utility Calibrate 1 4 Hardkeys Display Introducing the Instrument A Ouick Tour of the Front Panel The two types of hardkeys are instant action and menu Clear display and Run are examples of instant action keys because as soon as you press them the instrument changes operating states Time base and Trigger are examples of menu keys Pressing them causes softkey menus to come up on the right side of the display Instant Action Hardkeys Arrow Keys Disk Drive Nenn Knob CAL l no igna Hardkeys Keypad 3 ray er CONTROL E STORAGE E JENTRYMEASURE E BEE mem FO Olb Ooo cla laos 4 5 e LI TAT 7 orago Tan ajo ees 1Do000 0 7 HP 834834 HP 834854 2488 Mb s er ee fe O NE e i Softkeys 4 O ex we N
17. e Agilent 83480A 54750A and select the default setup by pressing Setup Default setup The default setup puts the instrument in a predefined operating condition This gives you a known starting point for the following exercises The default condi tions are listed in the setup section of the Agilent 834804 54750A User s Guide 2 6 Operating the Instrument Exercise 4 Finding the Signal Exercise 4 Finding the Signal The purpose of this exercise is to demonstrate the Autoscale function The Autoscale function can be used to automatically set up the display for most input signals To activate the Autoscale function press Autoscale A screen similar to Figure 2 1 will be displayed When the Autoscale function is enabled the instrument guickly analyzes the signal and sets up the vertical horizontal and trigger to optimize the display of the signal Autoscale can find repetitive signals with e afrequency greater than or equal to 50 Hz e aduty cycle greater than 1 e an amplitude greater than 50 mV p p Time base Units GI bit period Position 15 0000 ns Time e e Nr idiw 5 000 ns div windowing 1 100 mU div Figure 2 1 Signal displayed using the Autoscale function If you unintentionally press the Autoscale key or wish to disable the Autoscale function press Shift Undo Autoscale The instrument is reset to the settings that existed just prior to pressing
18. e Channe Autoscale Channel BH limit Channe Bandwidth Channel BH limit Channel Optical 83485 Channel calibration status Channe Calibrate Channel display Channe Display Channel filter Channe Optical 83485 Channel optical cal Channe Calibrate Channel skew adjustment Channe Calibrate Channel vertical cal Utility Calibrate Channel v al position Channel Offset Channel vertical scale Channe Scale Channel vertical units Channel External scale Channel view Channe Display Channel wavelength Channe Optical 83485 Channel magnify Nath Define function Clear measurements from screen SHIFT Clr Clear non volatile memory Utility System contig Clear stored pixel memory Havet orm Clear memory Clear waveforms from display Color grade measurement window Color grade refresh rate Color grade signal type Clear display Define meas Display Define meas Figure 2 6 The instrument Help menu Eye window Refresh rate Color grade sig A three column index appears on the display The left column lists the fea tures of the instrument the middle column lists the front panel key and if needed the right column lists the softkey you press to find that feature You can use either the knob or arrow keys to scroll through the Help menu 2 17 If the Mainframe Does Not Operate 3 3 If the Plug in Does Not Operate 3 4 In Case of Difficulty CAUTION In Case of Difficulty In Case of Difficulty In Case of Difficulty This
19. e unit of measure When you select a key with a unit of measure written on it you do not need to press the Enter key You only press the Enter key if you are entering numbers that do not require a unit of measure or that are in volts or seconds Depend ing on the value you enter with the keypad the instrument may round the value up or down For example if you try to enter 75 75 mV div the instru ment will automatically round the entry to 75 8 mV div Setting the offset Offset is similar to the vertical position on analog instruments except offset is calibrated If offset is set to 10 mV then you know the vertical center of the display is 10 mV For optical channels offset is referenced two divisions above the bottom of the display To move the waveform vertically on the display press Offset Readjust the scaling and offset until the signal is expanded vertically and is cen tered on the display as shown in Figure 2 2 2 9 Operating the Instrument Exercise 5 Modifying the Setup Channel 1 5 000 ns divw 75 0 murdiv 10 0 mu 1 Figure 2 2 Signal vertical display Note Agilent 83480A only You can automatically adjust the vertical scale instead of following the preceding pro cedure by pressing Channel Channel autoscale The amplitude scale is optimized for the input signal while the timebase settings are left alone Changing the time b
20. he word Fine written in blue above that key When the fine mode is active you will see the word Fine at the top right corner of the graticule area You get out of the Fine mode by simply pressing Shift on the keypad followed by pressing the arrow key with the word Fine written above it List softkeys A typical example of the list softkeys is Hysteresis It has several stacked rect angles that represents a list of choices you can choose from The top rectangle shows the selection that is currently active In the example below normal is the current selection Avgs 16 Hysteresis normal high ivity 5 000 ns div 75 0 mU div 10 0 mi 1 Figure 1 6 List softkey selection 1 9 Introducing the Instrument A Ouick Tour of the Front Panel You change selections by pressing the Hysteresis softkey which brings up a sec ond level softkey menu on the display Then you use the softkeys arrow keys or knob to change selections To activate that selection press the Enter softkey then the display returns to the previous softkey menu If you press the Cancel softkey the instrument returns to the previous selection Single choice softkeys A typical example of the single choice softkeys is Enter There are several varia tions of this type of softkey throughout the many softkey menus When you press the softkey the instrument executes that softkey command
21. ipment for Measurement Control and Laboratory Use and has been supplied in a safe condition The instruction documentation contains information and warnings that must be followed by the user to ensure safe operation and to maintain the productina safe condition There are many points in the instrument which can if contacted cause personal injury Be extremely careful Any adjustments or service procedures that require operation of the instrument with protective covers removed should be performed only by trained service personnel If this instrument is not used as specified the protection provided by the equipment could be impaired This instrument must be used in a normal condition in which all means for protection are intact only To prevent electrical shock disconnect the Agilent Product variable from mains before cleaning Use a dry cloth or one slightly dampened with water to clean the external case parts Do not attempt to clean internally This is a Safety Class 1 product provided with a protective earthing ground incorporated in the power cord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact Any interruption of the protective conductor inside or outside of the product is likely to make the product dangerous Intentional interruption is prohibited No operator serviceable parts inside Refer servicing to qualified personnel To prevent electrical shock do not remove covers
22. low it is assumed the Agilent 83483A or Agilent 54751A plug in module is resident in slots 1 and 2 of the mainframe Finger tighten the knurled screw at the bottom of the plug in module The RF connectors on the rear panel of the plug in module are spring loaded Finger tighten the knurled screw to ensure there is a good ground connection between the plug in module and the mainframe To remove the module loosen the knurled screws and then pull on the screws to take out the module Do not pull on the cables or connectors 2 4 CAUTION Operating the Instrument Exercise 2 Turning On the Instrument Exercise 2 Turning On the Instrument Set the line voltage switch on the rear panel to the correct voltage selection for your power source Connect a power cord from a power source to the rear panel connector of the mainframe Set the rear panel line switch to the ON position When the mainframe is set to the 115 VAC mode use the supplied power cord If you use an alternate power cord that cannot handle the power reguirements of the instrument the power cord may become warm or the instrument may not operate Set the front panel power switch to ON After a few seconds you will see a graticule on the display and a softkey menu on the right side of the display If the display is blank or if the message Power On Test Failed appears at the top of the display refer to Chapter 3 In Case of Difficulty or to the optio
23. more repeatable than manual marker measurements Automatic measurements use the waveform data stored in memory for all calculations and the waveform data in memory has a higher resolution than the resolution of the display The manual markers are not tied to the waveform data in memory they are just positions on the display The automatic measurement results are placed on the display where the verti cal scale and offset values are normally displayed as shown in Figure 2 5 2 15 Operating the Instrument Exercise 6 Making Measurements on the Signal Marker 1 400 ns div current width 1 10 19 ns 1 1 uU amptd 13 494 65 ml 201 4 253 50 mu 25 22 na 232 50 mu 35 40 nz 486 00 mi 10 18 ns 174X 98 25 MHz Figure 2 5 Signal automatic measurements Displaying the scale and offset values 10 To redisplay the vertical scale and offset values press Shift Clr meas The automatic measurement results are replaced by the vertical scale and off set values 2 16 Operating the Instrument Exercise 7 Using the Help Menu Exercise 7 Using the Help Menu To display the Help menu press Help A screen similar to Figure 2 6 is dis played Help Feature Hardkey Softkey Calibration status overall Utility Calibrate Cancel print SHIFT Setup Centronics printer selection SHIFT Print Destination Channel autoscal
24. nal Agilent 83480A 54750A Service Guide 2 5 CAUTION 1 CAUTION 2 3 4 ou Operating the Instrument Exercise 3 Connecting a Signal Exercise 3 Connecting a Signal Electrostatic discharge ESD on or near input connectors can damage circuits inside the instrument Repair of damage due to misuse is not covered under warranty Before connecting any cable to the electrical input momentarily short the center and outer conductors of the cable together Personnel should be properly grounded and should touch the frame of the instrument before touching any connector For more information regarding ESD refer to the Agilent 834804 54750A User s Guide Using the Agilent 8133A pulse generator or equivalent set a trigger and square wave signal to the following Trigger level o o ooooooooo o o 200 mV do not exceed 2 Vp p Pulselevel encolado iia 500 mV do not exceed 2 Vp p Pulse frequency ia eee 50 MHz Cables can build up high voltage levels that can discharge into the channel or trigger inputs and cause damage Cables should be discharged using a short or a 500 terminator prior to connection Make sure the trigger and pulse signals are enabled Comnect the trigger to the trigger input channel 2 on the Agilent 83483A 54751A electrical plug in module Connect the pulse signal to the electrical input channel 1 on the Agilent 83483A 54751A electrical plug in module Display the Setup menu on th
25. oes not operate properly then the problem is beyond the scope of this book Refer to the plug in module service guide or return the plug in to a qualified service department 3 5 Index Symbols width key 2 15 A amplitude 2 7 measurement 2 14 scale 2 10 analog signal 2 4 automatic measurement 2 13 2 15 Autoscale key 2 7 3 4 B bandwidth 2 4 Bit Rate softkey 1 8 C cabinet cleaning iiv CAL Signal overview 1 4 Calibrate softkey 1 4 Cancel softkey 1 9 care of cabinet iiv Channel autoscale softkey 2 10 Channel key 2 8 3 5 channel scale 1 9 classification product iiv cleaning cabinet iiv Clear display key 1 5 Clr meas key 2 16 connecting a signal 2 6 continuous softkeys 1 8 custom measurement 2 14 D Default setup softkey 2 6 description of the instrument 1 1 disk drive overview 1 4 display messages 3 2 overview 1 5 Display softkey 3 5 Done softkey 1 7 duty cycle 2 7 E electrical plug in module 2 3 2 8 Enter softkey 1 9 1 10 2 13 entry device overview 1 4 equipment used for display 2 3 expanding the signal 2 8 External Scale softkey 1 7 F finding input signals 2 7 Fine softkey 1 9 2 8 freerun softkey 3 4 front panel 1 4 1 10 fuse values iiv H hardkey overview 1 5 Help key 2 17 help menu 2 17 horizontal display 2 7 scale 2 10 Hysteresis softkey 1 9 I IEC Publication 61010 1 iiv input signal 2 4 2 7 installing a plug
26. on the Signal The purpose of this exercise is to familiarize you with the Marker menu and the automatic measurement features of the instrument You will begin by using the manual markers to make a pulse width and an amplitude measure ment on channel 1 After that you will make the same measurements using the automatic measurement features There are many additional features built into the instrument Refer to the Agilent 83480A 54750A Users Guide for more information on making automatic measurements Selecting the manual marker mode To select the manual marker mode press Marker mode manual Enter Change the mode selection by using the knob arrow keys or softkeys Setting the X Y source In the manual marker mode there are two X markers and two Y markers You can position the X markers horizontally and the Y markers vertically on the display Use the X markers to make timing measurements and the Y markers to make amplitude measurements To set the X1 Y1 Source to channel 1 press XT YT Source channel 1 Enter To set the X2 Y2 Source to channel 1 press X2 Y2 Source channel 1 Enter 2 13 Operating the Instrument Exercise 6 Making Measurements on the Signal Positioning the markers To position the X1 marker press XT Position Set the X1 marker to the left edge of the pulse To position the X2 marker press X2 Position Set the X2 marker to the right edge of the pulse To position the Y1 marke
27. provides several tutorials that show how to get up and running how to scale a waveform vertically or horizontally and how to use the Help menu Chapter 3 provides a few simple hints in case you are experiencing difficulty in either getting the mainframe or plug in module to perform properly To best meet your learning needs you can use this book in one of two ways Read A Quick Tour of the Front Panel on page 1 4 before performing the exercises Go straight to the exercises This method is for users who prefer to learn how to use the front panel by experimenting with the front panel controls If you are already familiar with the information in this book you can refer to the Agilent S8480A Agilent 54750A User s Guide which shows you how to use the instrument to make many common measurements It assumes you have already learned how to use the front panel of the instrument by first reading this quick start guide All calibration and repair information is contained in the optional Agilent 83480A Agilent 54750A Service Guide while all programming information is contained in the Agilent 834804 Agilent 54750A Program mer s Guide ii WARNING WARNING WARNING WARNING WARNING WARNING General Safety Considerations General Safety Considerations This product has been designed and tested in accordance with IEC Publica tion 61010 1 Safety Requirements for Electrical Equ
28. r press YT Position Set the YI marker to the bottom of the pulse To position the Y2 marker press Y2 Position Set the Y2 marker to the top of the pulse The display will be similar to Figure 2 4 Marker Hode channel 1 n 25 2240 ns i 23 3000 ns 1 75 0 mUu d v 10 0 mb Y x 1 1 253 50 my 25 22 n5 211 232 50 mu 35 40 ns 486 00 mu 10 18 ns 1 4X 98 25 MHz Figure 2 4 Signal custom measurements 2 14 Operating the Instrument Exercise 6 Making Measurements on the Signal Notice the AX and AY at the bottom of the display The AX value is the width measurement and the AY value is the amplitude measurement The markers allow you to make custom measurements on signals Remember they are not tied directly to the waveform data stored in memory they are just positions on the display Making an automatic width measurement To make an automatic width measurement on channel 1 press Shift width channel 1 Enter The automatic measurement results are displayed at the bottom left of the screen Making an automatic amplitude measurement To make an automatic amplitude measurement on channel 1 press Shift V amptd channel 1 Enter The IEEE pulse parameter standards are used for all of the automatic measure ments unless changes are made in the define measurement menu Automatic measurements are preferred because they are faster and
29. re toggle menu continu ous list and single choice Because the Trigger menu contains all five types of softkeys it is used over the next few pages to demonstrate the differences among the softkeys When you press the Trigger key the Trigger softkey menu comes up on the right side of the display as shown in Figure 1 3 Toggle softkeys A typical example of the toggle softkeys is Sweep A toggle softkey allows you to choose between two or more selections and you change selections by pressing that same softkey Sweep has choices of either triggered or freerun 1 6 Introducing the Instrument A Quick Tour of the Front Panel The highlighted choice is the selection that is currently active In Figure 1 3 triggered is highlighted which indicates that the instrument is set to triggered sweep Color grade is enabled Trigger 1 120 0 os div 4 50 0 m div 88 0 mU Figure 1 3 Toggle softkey selection Menu softkeys A typical example of the menu softkeys is External Scale refer to Figure 1 3 on page 1 7 The ellipses after the word scale indicate that when you press this softkey a new softkey menu comes up on the display that allows you to make several additional choices refer to Figure 1 4 To exit this menu sim ply press the Done softkey The display returns to the previous menu 1 7 Introducing the Instrument A Ouick Tour of the Front Panel External Atten
30. s not power up refer to the optional Agilent 83480A 54750A Service Guide or return the mainframe to a quali fied service department Refer to the Agilent 83480A 54750A Users Guide for a complete listing of Agilent Sales and Service Offices 3 3 In Case of Difficulty If the Plug in Does Not Operate If the Plug in Does Not Operate If the plug in does not operate Make the following checks Is the plug in module firmly seated in the mainframe slot Are the knurled screws at the bottom of the plug in module finger tight If other eguipment cables and connectors are being used with the plug in module are they connected properly and operating correctly Review the procedure for the test being performed when the problem ap peared Are all the settings correct Can the problem be reproduced Are the connectors clean Refer to the Agilent 834804 54750A User s Guide for more information about cleaning the connectors Does the plug in module work in the other two slots 1 2 or 3 4 Perform the following procedures Make sure the instrument is ready to acquire data by pressing Run Verify the pulse output is connected to channel 1 on the Agilent 83483A 54751A electrical plug in module Verify the trigger output is connected to the trigger input Find any signals on the channel inputs by pressing Autoscale Verify the Agilent 8133A pulse generator is set to Wavelormn os 5068 a na RAR Ys ee Bae NS Cas Dae ees sq
31. switch o O The OFF symbols are used to mark the positions of the instru ment power line switch The CE mark is a reg istered trademark of the European Commu nity CE The CSA mark is a reg istered trademark of the Canadian Stan dards Association The C Tick mark is a registered trademark of the Australian Spec trum Management Agency This text denotes the instrument is an Industrial Scientific and Medical Group 1 Class A product ISM1 A Typographical Conven tions The following conventions are used in this book Key type for keys or text located on the keyboard or instrument Softkey type for key names that are displayed on the instru ment s screen Display type for words or characters displayed on the computers screen or instru ments display User type for words or charac ters that you type or enter Emphasis type for words or characters that emphasize some point or that are used as place holders for text that you type il What You ll Find in This Book What You ll Find in This Book This book gives you a quick introduction to the instrument It is not intended as a comprehensive guide but rather as a starting point to start using the instrument quickly This book is divided into three sections Chapter 1 provides a description of the instrument and a quick tour of the front panel in a descriptive format with examples that help to illustrate the text Chapter 2
32. trical signal conditioning for the A D converters that are inside the mainframe 1 2 Introducing the Instrument The Agilent 83480A Agilent 54750A At a Glance Certification Agilent Technologies certifies that this product met its published specifica tions at the time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology to the extent allowed by the Institute s calibration facility and to the calibration facilities of other Interna tional Standards Organization members 1 3 Entry devices Disk drive CAL signal Introducing the Instrument A Quick Tour of the Front Panel A Quick Tour of the Front Panel This section describes how to use the front panel This information will help you gain the full use of your instrument in the shortest possible time This sec tion divides the front panel into the following areas e Entry devices e Disk drive e CAL signal e Hardkeys e Display e Softkeys The entry devices include the knob arrow keys and keypad The knob pro vides continuous control while the arrow keys are step controls The keypad allows you to enter specific values The disk drive is a 3 1 2 inch high density MS DOS compatible drive You can use the disk drive for loading applications storing and loading waveforms storing and loading instrument setups printing w
33. uare wave AMP Sidra ONT a AOR Ban 500 mV Frequency viaria Ge PRGA GaN hae ann 50 MHz Trigger Yes ccs dow II nk ar ii a an 200 mV P lse trigger 4 2 ee e eS De Be enabled See if any signals are present at the channel inputs by pressing Trigger Sweep freerun 3 4 In Case of Difficulty If the Plug in Does Not Operate After viewing the signal press triggered Make sure Channel Display is on by pressing Channel Display on off Make sure the channel offset is adjusted so the waveform is not clipped off the display If you are using the plug in module only as a trigger source make sure at least one other channel is turned on If all of the channels are turned off the mainframe will not trigger Make sure the mainframe identifies the plug in module by pressing Utility System config The calibration status of the plug in modules is listed near the bottom of the display in the box labeled Plug ins If the model number of the plug in module is listed next to the appropriate slot number then the mainframe has identified the plug in If known is displayed instead of the model number of the plug in module remove and reinsert the plug in module in the same slot If known is still displayed then the memory contents of the plug in module are corrupt Refer to the service guide for the plug in module or contact a qualified service department If all of the above steps check out okay and the plug in module still d
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