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HP Sprinkler 1980 A User's Manual

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1. Bei SES BIS Hus duce INPUT SIGNAL FREQUENCY Hz Vpk RATING BASED UPON CONTINUOUS SINE WAVE INPUT Figure 3 25 Maximum Input Voltage vs Frequency Operation 1980 1651 3 123 Operation Example Indication Comments Related Sections 3 124 Vertical Coupling Cont d Program Codes Select vertical coupling VC lt channel coupling channel 1 channel 1 N channei 2 Ground AC DC DC 500 coupling Gp Select DC coupling for channel 1 LOCAL ux keys REMOTE VC1 2 lt CR gt lt LF gt codes identifier E EOS channe coupling Vertical coupling is indicated by the lighted coupling key At power on DC 500 coupling is changed to DC as a default condition Trigger Delayed Sweep Trigger Main Sweep Vertical Position Model 1980A B Model 1980A B Operation Vertical Deflection Factor Description Vertical deflection factor channel sensitivity is adjustable from the front panel or via the HP IB Because it is a continuouly calibrated function waveforms can be accurately scaled for vertical axis measurement or reference Deflection Factor Characteristics Carige Leelee ki bre n elena 2 00 mV div to 10 0 V div resolution cue lees vv Rx ODORE Cb d 3 digits ACCUISOY N ARN RRR AA TA E ade CERE 3 Procedure Press E AED to select step BB channel 1 or 2 and change deflection factor with the Control Kn
2. ooo ooomoooomomonm o orr os ALTER TEORIA ERR ERR E Re e MICA 2 6 Front pariet Features iii einen NOE Suec ee RE ee isa ERE a QE ds 3 4 Getting Acquainted Exercise Setup sr ia wea cde Se ee e E EE NE E ER CREE CP E ERES 3 6 The BT REGOLE consiliari alc tees FM ETE Wes eiut am ec bL M LI d cii 3 8 The OPTION MENU Soft Key Definitions a dun ox oe oe e DOR I Ada OR ACE SEI URS NOE ENDS 3 11 Display Pare Features hid ear LEYES S EN RSEN RI rere ub 2 Paes Som ae is eios 3 13 CRT PORES oes 208 23 A E A AAA ANA A ra ale e 3 13 Control Panel Features ltda oi tants tale aia RETE OOO ee eRe aa 3 14 Voltage Panel Foatures cirie A 9 SO ee RIG EE eS 3 15 BRI ANC T s don cna A ERS P aa 3 16 Hosr panel Festi Oi os ue x auo exe ao e eic ee Re E arva TE TR i UE GUERRA a Se utt DUDE A ARA 3 17 HP IB Status ANSE so eve oat bbe eee oo Menu uas eate ces eae ae SR Cada nese PERO d ER 3 20 1980A 76 input Data Message EXaImplass ove erre eco EA IRAE ee PR don d 3 26 The Status Byte and the RQS Mask lt A AA SENA RAE e 3 29 Serial Poll With Require Service Message Disabled ROS Mask Value 0 3 30 Serial Poli Using the Require Service Message ROS Mask Value Q csse rn nnn 3 31 Divider Probe Adjustment Diba sissy Soa n E ci odor a RR OU Reato diede 3 41 Typical Advisory Message Display desire eed hs eae AES ai ae VUE RUE CK A RENTA 3 42 The 1980A7B CRI REO Uco se pce ARA ARA xir d dote cb A UOCE RE GER EE Ew 3 52 The HP IB Status Advisofy oo 6
3. AC lt mode gt mode ii 1 alternate sweep 2 chop sweep 3 automatic selection Select chop sweep vertical display mode REMOTE AC2 lt CR gt lt LF gt codes i identifier EOS mode Display channel 1 channe 2 LOCAL 2 keys REMOTE VM3 CR LF codes identifier y PEE TEE CIE mode Vertical mode and vertical display mode selections are indicated by lighting the corresponding keys Also the CRT readout displays the deflection factor of the enabled channels If the 1980A B is in dual horizontal mode chop mode is not permited for main or delayed sweep speeds greater than 1 usec div The display mode will default to alternate mode unlighted when either sweep speed is faster than 1 usec div if sweep speed is changed to 1 usec div or slower the original vertical display mode is restored Horizontal Mode Trigger View Model 1980A B Operation Vertical Position Description The vertical position of channel 1 or 2 is adjustable from the front panel and via the HP IB Trace baseline can be positioned as much as 10 divisions off screen Vertica Position Characteristics position range dai a 15 00 to 15 00 div i es 2 00 A ae eea 0 02 major division ACCUE EN pei pae 2 of reading 0 3 major division channel 1 or 2 then adjust the Control Knob Tor Procedure To adjust the vertical position of channel 1 or 2 press desired setting CHE Program Codes Set chan
4. PRELIMINARY OPERATING AND PROGRAMMING MANUAL 1980 A B OSCILLOSCOPE MEASUREMENT SYSTEM SERIAL NUMBERS This Manual applies directiy to instruments with serial numbers prefixed 19474 For additional information about serial numbers refer to INSTRUMENTS COVERED BY MANUAL in Section L P AUSTGEN M HARMS J HARTZLER D JOHNSON J SCHEETZ J VIVEIROS COPYRIGHT HEWLETT PACKARD COMPANY COLORADO SPRINGS DIVISION 1980 1900 GARDEN OF THE GODS ROAD COLORADO SPRINGS COLORADO U S A ALL RIGHTS RESERVED a OPERATING AND PROGRAMMING MANUAL PART NO 01980 90902 Operating and Programming Microfiche Part No 01980 90802 E Operating and Service Manual Part No 01980 90901 E Operating and Service Microfiche Part No 01980 90801 SAFETY CONSIDERATIONS GENERAL This is a Safety Class I instrument pro vided with terminal for protective earthing OPERATION BEFORE APPLYING POWER veri fy that the power transformer primary is matched to the available line voltage the correct fuse is instalied and Safety Precautions are taken see the following warn ings In addition note the instruments external mark ings which are described under Safety Symbols Servicing instructions are for use by service trained per sonnel only To avoid dangerous electric shock do not perform any servicing unless qualified to do so BEFORE SWITCHING ON THE INSTRUMENT the protective earth terminal of the instrument mus
5. Procedure 3 118 Model 1980A B Trigger Flag Cont d A special horizontal mode must be selected to use the trigger flag This mode is enabled with the program code SG This command puts main sweep in single mode resets the sweeps and initializes the trigger flag The SG command does not affect any of the variable function parameters The 1980A B can be programmed to issue the Require Service message at the completion of SG enabled sweeps Also a timer can be set to cause Require Service after a maximum sweep wait time has expired The procedure for enabling Require Service after SG enabled sweeps or timeout is described in the Service Request Condition Detailed Operating Instruction Follow this general procedure when making trigger flag measurements Preset horizontal and vertical functions for the measurement procedure Set the trigger flag mode and enter the sweep wait time Enter ROS mask value for end of sweep if SRO interrupt is desired Start search with SG command and wait for end of sweep or timeout interrupt or test status byte for these conditions Test trigger flag state Program Codes Set trigger flag mode TF lt mode gt mode 1 delayed trigger source latched 2 delayed trigger source dynamic 3 main trigger source latched 4 main trigger source dynamic Model 1980A B Operation Example Comments Related Sections Trigger Flag Cont d SRE Enter maximum sweep wait time
6. SW factor 1 factor 2 gt lt factor 3 gt factor 1 integer ddd O to 000 units of 23 usec factor 2 integer ddd O to 999 units of 5 84 msec factor 3 integer ddd O to 999 units of 1 5 sec Program the trigger flag to detect a trigger from the delayed trigger source during delayed sweep Set maximum wait time 40 6 msec and enable sweep REMOTE TF1 SW242 6 0 SG lt CR gt lt LF gt codes identifier 4 ba EOS flag mode enable sweep identifier timeout value After the program code SG is sent to the 1980A B it is in a special state that is not indicated on the front panel After executing a routine using SG proper instrument state can be restored by sending the program code SM1 selecting V vs T mode If the main trigger source latched mode is selected the delay value must be set to zero for proper operation in latched mode the duration of delayed sweep must be considered Sweep length is not calibrated and can increase from the nominal 11 divisions to more than 4O divisions at fast sweep speeds Delay instrument Status Horizontal Mode Reading Values Via HP IB Service Request Condition Sweep Mode Delayed Sweep Mode Main Trigger Delayed Sweep Trigger Main Sweep 3 119 Operation Model 1980A B Trigger View Description Trigger view displays the main or delayed trigger signal This feature is a usefui aid when configuring the trigger cir
7. HP 85F HP 9825B with 98034A CRT Display revised 98213A HP Extended BASIC Lower Cost Digital Voltmeter DVM HP 3438A HP 3465A HP IB HP IB is Hewlett Packard s implementation of IEEE Std 488 and the identical ANSI Std MC1 1 Mode 1980A B installation SECTION li INSTALLATION 2 1 INTRODUCTION This section provides installation instructions for the Measurement System Also included is information pertinent to initial inspection preparation for use storage and shipment 2 2 INITIAL INSPECTION WARNING To avoid hazardous electrical shock do not perform electrical tests when there are signs of shipping damage to any portion of the outer enclosure covers and panels inspect the shipping container for damage If the shipping container or cushioning materia is damaged it shou Id be keptuntil the contents of the shipment have been checked mechanically and electrically The contents of the shipment should be as shown in figure 1 1 Procedures for checking electrical performance are given in the Operator s Checks in Section III and Performance Tests in Section IV If the contents are incomplete if there is mechanical damage or defect or iftheinstrument does not pass the electrical performance test notify the nearest Hewlett Packard Sales and Service office if the shipping container is damaged or the cushioning materials show signs of stress notify the carrier as well as the Hewlett Packard _ office Keep t
8. damaged instrument can cause additional damage The line voltage switch settings and line fuse are selected at the factory according to the line Mains voltage available in the country of destination To operate the instrument from any other power source proceed as follows a Disconnect power cord b Using a blade type screwdriver position rear panel LINE voltage select switches for desired Vac input Figure 2 1 shows switches set for 120 Vac operation c Select and install proper fine fuse Fuse current ratings are printed on the LINE module on the instrument s rear panel and are listed with HP part numbers in table 2 1 d Reconnect power cord Table 2 1 Line Fuse Part Numbers Line Voltage HP Part Number 100 120 Vac 250V 3A 2110 0003 Fast blow 220 240 Vac 250 V 1 5A 2110 0043 Fast blow Figure 2 1 Line Voltage Selection Switches 2 2 Model 1980A 8 Installation 2 6 AC Power Cable WARNING BEFORE CONNECTING THIS INSTRUMENT the protective earth terminal of the instrument must be connected to the protective conductor of the Mains power cord The Mains plug must be inserted in a socket outlet provided with a protective earth contact The protective action must not be negated by the use of an extension cord power cable without a protective conductor grounding Grounding one conductor of a two conductor outlet does not provide an instrument ground This instrument is equipped with a three wire p
9. 0 1 Hz range 10 Hz to 100 kHz squarewave 2 kHz to 50 kHz sinewave level O to 10 Vp p range 3 pF to 20 pF accuracy 596 2 channels delayed sweep sensitivity 5 mV div bandwidth 100 MHz ievel 20 mV to 100 V accuracy 10 25 1 50 ohm input 2 50 ohm outputs input R 1M ohm shunt C 12 pF division ratio 10 1 comp range 20 to 26 pF division ratio 1000 1 into 10 Mohm DVM input bandwidth 10 MHz to 100 MHz accuracy 13 range 10 MHz to 100 MHz No Substitute range 5 nsec to 1 sec accuracy 10 01 HP 9835A with 98332A 1 0 ROM and 98034A revised Of HP 85F Ballantine 6125B HP 3465A OF HP 3438A HP 5382A HP 3310A HP 4332A HP 1740A Baliantine 6125B Generai Radio 874 TPDL HP 10041A HP 34111A HP 3406A with HP 11063A Sampling Tee HP 3200B HP 5004A Ballantine 6125B C Operator s Checks P Performance Testing T Troubleshooting Generai Information Model 1980A B Table 1 3 Recommended Test Accessories Accessory Type l Suggested Part Adapter GR874 to female BNC HP 1250 0850 Adapter GR874 to male BNC HP 1250 0849 Tee BNC coaxial one male two female connectors HP 1250 0781 Table 1 4 Alternate Test Equipment Instrument Suggested instrument Advantages Type Alternate Replaced of Alternate Controller HP IB HP 9835A with 98332A HP 9825B with 98213A CRT Display and 980344 revised and 98034A revised HP Enhanced BASIC Larger Memory
10. Change channel 2 vertical position if necessary to center waveform Waveform peaks should just reach the O and 100 points marked on the right hand side of the CRT Press EZ ch 2 and center with Control Knob Press 77 to display delayed sweep as a marker on waveform amp and move Model 1980A B Operation GETTING ACQUAINTED EXERCISE Decrease marker width by increasing delayed sweep speed until marker just overlaps the pulse rising edge Press dly d and adjust with the Control Knob Display the delayed sweep trace only press Change delay time until pulse edge intersects the center vertical graticule line at the 1096 point Press B s change with the Control Knob Press fi to turn on and zero the AT function Increase delay time with the Control Knob until the pulse edge intersects the center verticai graticule line at the 90 point Read the pulse risetime expressed as AT in either the LED or CRT readout For more information about timing measurements refer to the Delta Time Detailed Operating Instruction INITIALIZE Set LINE switch to OFF then to ON 3 18 Using Soft Key Menus Soft key menus add many special measurement and utility functions to the instrument Menus redef ne the soft keys with labels displayed on the CRT To call the first level menu press Figure 3 4 contains an explanation of the soft key DOMENUS Hi functions defined by initializes 1980A
11. Procedure indication Response Comments 3 47 HP IB 1 0 Check memory is operating properly and that it contains valid data Both memory checks are in the UTILITIES menu which is called with the key sequence To execute ROM Checksum select the LF 2 menu then press HECESLIM This routine can also be executed via the HP IB by sending the Data message IN SK0 2 4 6 CR LF 7 This check can also be executed via the HP IB by sending the Data message IN SK0 2 4 5 CR LF When the instrument passes either the ROM Checksum or RAM Test the advisory E on the CRT f is displayed If the instrument fails a ROM Checksum or RAM Test an error message is displayed in the LED readout that indicates where in memory the faiure occurred When the first error is detected the routine is aborted and the advisory FALE TEST is displayed If the instrument fails either the ROM Checksum or the RAM Test it might be useable but it does require servicing Executing either the ROM Checksum or the RAM Test causes the advisory messages to be enabled However there are no other changes in instrument front panel settings or status Description The following procedures check the Oscilloscope Measurement System s ability to process or send all of the applicable HP IB messages described in table 3 3 In addition the instrument s ability to recognize its HP IB address is checked and a
12. dd dd tassumed decimal point 20 00 div to 20 00 div external 1 d ddd assumed decimal point 1 200 V to 1 200 V external 10 dd dd t assumed decimal point 12 00 V to 12 00 V external 100 ddd d t assumed decimal point 120 0V to 120 0 V Example Select channel 2 as trigger source negative slope DC coupled with HF reject REMOTE MT 2 5 lt CR gt lt LF gt codes identifier INR Es Tm EOS slope coupling source Enter main trigger level of 1 60 divisions REMOTE ML 160 lt CR gt lt LF gt codes identifier 3 115 Operation indication Comments Related Sections 3 116 Model 1980A B Trigger Main Sweep Cont d When the Control Knob is assigned to main trigger level is lighted and the trigger source and level value is displayed by the LED readout Trigger source is displayed by the CRT readout and the corresponding source selection key is lighted Trigger slope and coupling are indicated by lighting the corresponding keys At power on DC 500 coupling is changed to DC as a default condition The main external trigger input has a probe key contact If an external trigger source is connected via a recommended HP 10080 series miniprobe trigger level is displayed as measuredat the probetip including the probe division ratio A probe key closure at the main trigger external input causes a momentary shift in main trigger level any source selected to identify the trigger v
13. possible 11 digits 1 5 General Information 1 6 Mode 1980A B Table 1 1 Specifications Page 2 of 4 Accuracy Delay or Time Interval 5 ns div to 9 99 s div 2 ns 0 1 of reading 110 0596 of reading 210 ns div 2 ns 0 1 of reading 1 of dly d S div X 10 div 0 05 of reading 196 of diy d S div X 10 div Within one hour of a Delay Self Calibration and in constant ambient temperature Delay Jitter 0 002 of delay time at 10 MHz 10 kHz 0 01 of delay time Adjustment Numerical step size is related to current delay value Normal step size is related to sweep speed TIME INTERVAL AT A zero time reference can be set anywhere in the delay range and a time interval measurement can be made from that point Resolution Adjustment Accuracy same as Time Delay FREQUENCY 1 AT Calculates and displays reciprocal of time interval measurement Resolution same as AT As frequency increases insig nificant digits are truncated Adjustment Accuracy same as Time Delay DIGITAL DELAY Range O to 108 1 events Resolution 1 event Adjustment coarse stepping is in a 1 2 3 9 10 20 30 90 etc sequence fine stepping is a change of 1 in least significant digit Maximum Rep Rate 15 MHz with a 50 duty cycle TRIGGERING Main and Delayed Time Bases MAIN SWEEP Triggered specified level and slope is required to generate a sweep Auto Triggered b
14. resolution scsi v RURAL 0 02 div Procedure To change dual separation press i MAS and adiust Control Knob for desired value Separation can only be adjusted when dual horizontal mode is selected EE Program Codes Enter separation value SP lt value gt value decimal d d d d 5 00 div to 5 00 div Example Enter a dual separation value of 4 50 divisions PRES REMOTE SP 4 50 lt CR gt lt LF gt codes identifier ora EOS separation value Indication When the Control Knob is assigned to dual separation by the LED readout is lighted and separation value is displayed Comments T an odd integer to the nearest hundreth is entered via the HP IB it will be rounded to the nearest even value positive values are rounded down negative values are rounded up Related Control Knob Sections Horizontal Mode 3 90 Model 1980A B Operation Service Request Condition Description This instruction explains how to set the interrupt mask RQS mask for the Require Service message The Procedure CEE Example related sections listed at the end of this instruction describe the instrument s serial poll capability and the status information that can be obtained The service request condition cannot be set or displayed from the front panel of the instrument Program Codes Enter the ROS mask value IM lt value gt value integer ddd i Osvalue lt 255 refer to table 3 19 The mask v
15. 0e 08 CR LF codes identifier sweep speed value 3 100 Model 1980A B Operation Sweep Speed Delayed Cont d indication Delayed sweep speed is displayed by the CRT readout When the Control Knob is assigned to delayed sweep speed Gi is lighted and the parameter value is displayed by the LED readout Also the CRT readout indicates Control Knob assignment by displaying fluc in inverse video Comments lf delayed sweep speed is much less than main sweep speed the 1980A B displays the advisory LOM HO HUK Ev SLOH TY ELI when is pressed and when the delayed sweep speed is changed When automatic vertical display mode selection is enabled nme delayed sweep speeds less than 1 msec div cause chop mode to be selected Related Control Knob Sections Delay Intensity Trace Reading Values Via HP IB Sweep Mode Delayed Sweep Speed Main Vertical Mode 3 101 Operation Model 1980A B Sweep Speed Main Description The sweep speed of the main timebase can be entered from the front panel or via the HP IB Main sweep speed is independent of delayed sweep speed any value within the specified range can be entered Main Sweep Characteristics FANGE A ea 5 00 nsec div to 1 sec div FeSOIULIOD isa da 3 digits accuracy 5 nsec div to 9 99 nsec div 3 center 8 div 10 nsec div to 9 99 msec div 13 first 10 div 10 msec div to 1 sec div 14 first 10 div
16. AND CONTROLS TYPE post accelerator approx 22 kV accelerating potential aluminized P31 phosphor GRATICULE 10 X 10 div internal graticule 0 2 sub division markings on major horizontal and vertical axes 10 X 12 cm display area TRACE INTENSITY adjustable in relative steps of 1 from O to 99 CHARACTER INTENSITY adjustable in relative steps of 1 from O to 99 FIND BEAM returns trace to CRT screen regardless of setting of vertical horizontal or intensity controls GRATICULE ILLUMINATION internal flood gun ALIGN aligns baseline with horizontal graticule line ASTIG controls roundness of beam OPERATING CHARACTERISTICS AUTOSCOPE seeks scales and displays input signals gt 20 mV and gt 50 Hz Autoscope preselects V vs T operating mode main sweep assigns Control Knob to main sec div ac input coupling character generator on internal trigger source positive slope and trigger level to O 5 div SELECTIVE AUTOSCOPE seeks scales and displays selected channels in the same manner as autoscope except all setup functions below the variable function keys on the VOLTAGE and TIME panels are preserved PROBE RECOGNITION deflection factor AV or external trigger level readout is automatically adjusted for division ratio of recommended 1 1 or 10 1 probes SAVE RECALL REGISTERS saves up to eight complete front panel setups in nonvolatile memory PRESET sets front panel to V vs T intensified sweep mode 100
17. B calls COHFIDENCE TEST menu calls IMSTALLED OPTION LIST menu MBE menu calls HF IE ADDRESS turns off QF TION MEHL Figure 3 4 The 80 345 Press s SHAR E This calls DOQODEF Press 8 to test channel 2 Operation Model 1980A B GETTING ACQUAINTED EXERCISE Confidence Test executes a series of autoscopes while changing the calibrator output level It checks the vertical attenuators and the vertical horizontal and trigger circuits At the end of the test an advisory is displayed to indicate whether the instrument passed or failed Now call the L menu by pressing Utility functions are primarily used for testing and servicing the instrument All menus except OFT POM MEM provide backstep capability to allow returning to the previous menu Return to the CALI E i 5 menu by pressing E To return the soft keys to their normal functions press SEE For more information about menu functions refer to the Soft Key Menus Detailed Operating Instruction INITIALIZE Set LINE switch to OFF then to ON 3 19 Using Save Recall When a test sequence is used repetitively instrument states can be stored in the Save Recall registers for recall during the procedure Up to eight instrument states can be stored Theregisters are selected using the soft keys after the SAVE SETTIMGS HT Sf menu is called Store the current instrument state in regist
18. B Operation ST rs HPIB A Local to remote Mode Changes The Measurement System switches to remote upon receipt of the Remote message The Remote message has two parts Remote Enable REN bus control fine true Device listen address MLA received once while REN is true All instrument settings remain unchanged with the local to remote transition However the remote to local transition does put the Contro Knob in hold If the HP IB status advisory is enabled is displayed in the status advisory to indicate remote mode If the Measurement System is set to listen only or talk only mode the local to remote transition is inhibited 3 25 Local Mode Local Capability In local the Measurement System s front panel controls are operational Although it will not respond to input Data messages in local mode if addressed to talk the instrument can send Data messages and the Status Byte Whether addressed or not the instrument responds to the Remote Local Local Lockout Clear Lockout Set Local and Abort messages it also can issue the Require Service message in focal mode Remote to local Mode Changes The instrument always switches to local from remote whenever it receives the Local message GTL or the Clear Lockout Set Local message The Clear Lockout Set Local message sets the Remote Enable control line REN false If it is not in Local Lockout mode the instrument also switches to local from remote when the key sequence 5 is pr
19. EOD Ph ER A e TR 3 106 Trigger View Display Timebase eroe neh e LE eon wt d da voi EA EI CR A UOCE es 3 121 the Status Byte and ROS Mask A eos e De adc ae leta deg a ari ARA e E S a 3 133 Program Code Prefix To Function Cross Reference 0 0 cc Li 3 133 Program Code and Format Summary idas a NARA ETA A A E 3 134 FIDA 7B Key Codes Since gree psec tactis aal a rent AA os Fels Nr A wes 3 135 1980A B Text Character Set Modified ASCII 2 6 5 css sue ug Ra AA 3 135 HP IB Syntax Error Codes pil ae is LAVELLO VD JP VI CR IU Seu CED hs d ba Sie AR VE Ea Ae 3 135 Commonly Used Code Conversions ss ss s e x ex c c Se Wu rA VER qu ebria EE RES 3 137 viti ix Blank General Information Model 1980A B Figure 1 1 HP Model 1980B Oscilloscope Measurement System and Supplied Accessories 1 0 Model 1980A B General Information SECTION GENERAL INFORMATION 1 1 INTRODUCTION From the standpoint of operation the Model 1980A and Model 1980B Oscilloscope Measurement Systems are virtually identical the major difference is in physical configuration The 1980A is a cabinet model for bench operation The 1980B is configured for either rack mounted or bench operation In this manual the two models are referred to collectively as the 1980A B Where distinction is necessary the two models are referred to separately The 1980A B Operating and Service Manual has eight major sections The manual contains the following information
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22. RETTA CDS eS Ag Ca Rd Mind on a eat d S Co aN oak ER DN C Redi mede Su ed DAS ACA EA ARAS TI nani A RA a amp apt RAT TES haha AE TT Sa ET N E R O RS SS Bite xi bok ATA aR AE AA TAE RRR a su T A NTE ATR AAA CALIPER iaia ar a apes N Tar Ea LHA ATAN KR eoe eo Fd KE A EIA RESTI HRE A POI IA buco videa de HS eraty Aa aa CES ATEN RAR ATA REOT SR SESS EE ORIO ERI tole Etre evi E act e ls ar dO CRA A ENI NEE TR LAI R m OR OV N Fo o9 o a p po 9 Vo OB na od 4 Po O3 o9 2 KL OS o t om don t t t t ng o o o o e a 4 sr 44 aaa aan oo rr a eses o SS SS q 323 3 24 3 24 3 26 3 26 3 27 3 27 3 28 3 28 3 28 3 28 3 28 3 28 3 28 3 29 3 30 3 31 3 32 3 32 3 33 3 33 3 34 3 34 3 35 3 35 3 36 3 37 3 37 3 38 3 38 3 38 3 39 3 40 3 40 3 40 3 40 3 42 3 46 3 49 3 50 3 52 3 54 3 57 3 60 3 62 3 64 3 66 Table of Contents Model 1980B TABLE OF CONTENTS Cont d Horizontal POSI siae LI RA E da III 3 68 o HPR L E A ON 3 69 1 HP HB Statius AUS as 3 08 Gero O a E bate e ate Gara ali oar rt a tua 3 70 PIP A V EOS coa alice bata e ERA et OR a AE S A aloe Ub de ee A 3 72 VILE agi RIA a RAR EEA 3 73 instrument SERIUS eq a Xy CERO NOE A COR ENI ORI RETTE teli 3 75 Intensity Characters and Lamps sari i ila OR C TAS Uo e D ee dee o d de CE NATIA 3 77 Intensity race chip boar Tous e or i S ea d exl e e rent Pe
23. SEO Press Press to return the soft keys to their normal functions Exampie Check the HP IB addressing mode and address then exit the menu with E Indication The following information is displayed in the WE TE REDE mode and address MOTE menu to indicate the current addressing ARES lt dd gt indicates instrument is addressable lt dd gt is the instrument talk and listen address LISTEN OHLY indicates listen only mode selected TALE OHML Y indicates talk only mode is selected When listen only mode is selected the HP IB status advisory displays HF 1E i When talk only mode is selected the HP iB status advisory displays H IE T Comments Talk only mode i not supported by the standard 1980A B iz MOTE menu resets all HP IB parameters except the address value and addressing mode to the states described in the Power on Default Conditions Detailed Operating Instruction Related HP IB Status Advisory Sections Power on Sequence and Defauit Conditions Remote Operation paragraph 3 21 3 69 Operation Model 1980A B E HP IB Status Advisory Description The HP IB status advisory displays basic HP IB status information onthe CRT The advisory indicates when the instrument is inremote mode is addressed to talk or listen or if it has issued the Require Service message If none of these conditions are in effect the advisory is not displayed The status advisory can be di
24. SUBISAS peoueipy SHO A ae PR Stefan ero Omg yeahs 9 2261 POL gs meus Omg Sep po 20 Fy 69 24 381 90 11 28 90 19 nO Ne oe nw posae S3NIddl1lHd py SUR SAS osos 098 20 el PES o R z uyana pry eg sng HALO preyoegmamay 99U9AOI1d Ue XIV 00581 B1oqe is 0098 40 ZEUE 00 019 XML ISE op pleyoed joan WOO PL RA y sjuewnaasu SCION syessnig oa PRONE l peoy ain 6104 PUN 200 29 12 oe aag ap eauuog aoejd USR 2 169 P19 301 IZvug 6097 NOIMUSA y peqetue si Aug eoipai jeonAjeuy uenee EIEEE Mi 483 pui Ba oba ony 92 1948 419 A L F08c9 00 Pal sejno r 97 S Y PIDIO OAOH 161 H6H 641812 e3utod nig veqored PEREZ XP 18919 Buobuojjom 12i 190 j uero np onusAv 1009 06 90 181 10 EL SF 191 800814 PILYE HOMOH sed xe PAG enu 642 06 09 099 zo 381 PI Md BHRHSAY pioxoed NAMAN 9 9 101989 65199 RL zhjouog pIeyoes HOINH zs MESO py 046398 4 19 a 920 00 equiog 09 S unquiegH 00024 Ap SEG G0p LE 1991 PIT epeueg peyoedHaMSH HHaL py rezeg Ol puepyony wosdy NI YS Mistiog Pleyorg btc Tix oO sng 7 unang MODERA g Buuipeysdey e LI 09 19 PL op 99 Le 20 361 PIT epeue pyeyoeq siessnag 0211 9 A pry Kuedio 3 oxusa peoy nonvep 691 PANAN E adas sy Rais no auc asno xog pueg Sinqwey OMA SOYOSIULOS x802 IEIHA 971 po4e uig orto 9383N0 Wiggs uso TWAIAVO VITVHLSNV 9682 xalol 681 97 xog O d p Doo 1812 xol TE A dr 208 Rea riis eng Haut pigos giua esno no 801E zg Tapis 025 298 019 XML HOMO 0p anuary vrivulsnv Race PE
25. Section General Information describes the instruments documented by this manual it also provides a basic description of the Measurement System which includes options accessories and specifications Section Il Installation provides information about initial inspection preparation for use including HP IB address selection for remote operation and storage and shipment Section IIl Operation provides detailed operating information for the instrument including remote HP IB operation and operator s checks and maintenance Also included is a front panel description and a getting acquainted exercise to familiarize the first time user with the basic Measurement System operating procedures Section IV Performance Tests presents the procedures required to check the performance of the instrument against the critical specifications in table 1 1 Section V Adjustments provides instructions for properly adjusting the instrument Section VI Replaceable Parts provides ordering information for all replaceable parts and assemblies Section VII Manual Changes contains manual change information necessary to document all serial prefixes listed on the title page of this manual In addition this section also contains recommended modifications for earlier instrument configurations i Section VIII Service provides the information required to repair the instrument This Operating and Programming Manual contains Sections II and Ill only
26. TEST EQUIPMENT Table 1 2 lists equipment required for maintaining the 1980A B The Critical Specifications column describes the essential requirements for each piece of test equipment Other equipment can be substituted if it meets or exceeds these critical specifications The Suggested Model column may suggest more than one model The first model shown is usually the least expensive single purpose model Alternate models are suggested for additional features that would make them a better choice in some applications For example reasons for recommending an alternative model might be HP IB programmability a or o Muliti function capability that is one model can replace two or more single purpose models Table 1 4 presents the advantages of the alternate suggestions 1 4 Model 1980A B General Information Table 1 1 Specifications Page 1 of 4 OPERATING MODES Voltage vs time V vs T channel 1 vs2 1 vs 2 monitor mode for logic state display with HP Model 1607A XYZ VERTICAL DISPLAY MODES V vs T Channel 1 channel 2 channels 1 and 2 displayed on alternate sweeps ALT channels 1 and 2 displayed by switching between channels at approx 400 kHz rate with blanking during switching CHOP automatic selection of alternate for sweep speeds gt 1 ms div and chop for sweep speeds lt 1 ms div AUTO CHOP ALT channel 1 pius 2 algebraic addition 1 2 channel 1 and or 2 may be inverted and either main or delayed tri
27. The Service Manual contains the remaining sections A second copy of the Operating and Programming Manual is included in the manual set it should be kept with the instrument for operator reference Additional copies may be ordered separately through your nearest Hewlett Packard Sales and Service office The part numbers for the complete Operating and Service Manual andfor the Operating and Programming Manual alone are listed on the title page of this manual Also listed on the title page is the part number for a microfiche version of the complete Operating and Service Manual The microfiche are 100 X 150 mm 4 X 6 inch microfilm transparencies of the manuals Each microfiche contains upto 96 photo duplicates of manual pages The microfiche package also inciudes the latest Manual Changes supplement 1 1 General Information Model 1980A B 1 2 SPECIFICATIONS Specifications and supplemental characteristics of the 1980A B Oscilloscope Measurement System are listed in table 1 1 This instrument will meet the electrical characteristics listed following complete calibration as given in the Adjustments section of the manual These electrical characteristics apply over the ambient temperature range of O to 55 C except as otherwise noted Warm up time for given accuracy is 30 minutes 1 3 SAFETY CONSIDERATIONS WARNING To prevent personal injury observe all safety precautions and warnings stated on the instrument and in the manual This produc
28. Trigger Does not have device trigger capability however GET is decoded and available for use by internal or plug in options Does not respond to the Clear message Yes All front panel menu and remote functions are bus pro grammabie except LINE switch sss and CRT adjustments Also all instrument settings may be read via the HP 1B 3 18 Model 1980A B Applicabie Clear Lockout Set Local Pass Take Control Require Service Status Byte Status No Bit Commands Control lines and interface Functions are defined in IEEE Std 488 1978 Knowledge of these might not be necessary if your controller s manual described programming in terms of the twelve HP IB Meta Messages shown in the teft column Table 3 3 HP IB Message Reference Table 2 of 2 Instrument Response Enabled to remote mode when the REN bus contro line is true However it remains tn local until it is addressed to listen the first time Control Knob is put in hold on local to remote transition Returns from remote to local woe it receives the Local message or the key sequence L Liza is pressed Settings remain unchanged after the remote to local transition When in remote and local lockout is in effect the front panel is disabled Only the system controller can return the instrument to locat Returns to local and local lockout is cleared when the REN bus control line goes false The controller subset is not implemented Sets t
29. by lighting the corresponding key The NOT indicator is lighted when the main sweep is armed and not triggered Related Delay Sections Sweep Mode Delayed Trigger Main Sweep Trigger Delayed Sweep Trigger Flag 3 99 Operation Model 1980A B Sweep Speed Delayed Description The sweep speed of the the delayed timebase is adjustable from the front panei or via the HP IB Delayed sweep speed is independent of main sweep speed any value within the specified range can be entered Delayed Sweep Characteristics range SER AP TAE A poe eres eed A 5 00 nsec div to 1 sec div resolution Luisiana e a EINER 3 digits accuracy 5 nsec div to 9 99 nsec div eae 3 center 8 div 10 nsec div to 9 99 msec div 13 first 10 div 10 msec div to 1 sec diV Licia 14 first 10 div Within 10 C of calibration temperature For temperature beyond 10 C and within O to 55 C add 1926 for sweep speeds from 5 nsec div to 500 msec div to 1 sec div Procedure Press is and adjust delayed sweep speed with the Controi Knob Select fine or coarse step resolution with In coarse steps are in a 100 150 200 300 900 sequence In fine steps are change of 1 in least significant digit Program Codes DS lt value gt value exponential n dd nd djndd Eje SP J di d b 00e O8 to 9 99e OO sec div Example Change delayed sweep speed to 10 usec div REMOTE DS 10
30. ead ei x oT etnie LESA RE M es 2 44 HP IB Interface Connector usas swa c EN RR ERA a d le COTTON E SORTE ere Ln Vulp eA Chassis Ground TT RESO S a s T es 2 4 Operating ENVFON MEN sii e dis Fact BOR RR Pro od iaia calare PA VE E AO E TTC TEL Bench Operation loo 9 Soo ds Rack Mounting 6 Lara ERRATA RICO dou d d A ae Te Storage and Shipment DRESS MEE ES Plac xo Wu vu etate dcs IX Mei PODER raa eee Environment one fl yv e AU oed pne Qa e a RC de pare ux E lem ar ST uas rid iadli Dosage mor 2 7 Packaging Ae siete es A TC ennt Original Packaging oi a Vibra Mir aero eo ER s Sra 2 7 Other Packaging rioni lea A dio doy rS as DU V RO NER ete 2 7 iti Tabie of Contents introduction rade TABLE OF CONTENTS Cont d SECTION iil OPERATION Operating Characteristics latita ated iste e uS hi RT TTE eni ETIN Local Operation TEN T TE Diana Da T Simplified Operation Vitel daria v ia CRETE L EAEE Getting Acquainted oooooococooomomosso s EG Rae ee b QA E CE xe Vua pute eds OPTED Panel Features m DP veau dod t egets Terran nen RE UN EO vs ius Detailed Operating Instructions bua vant we eiua ERA ved EET aud deut Remote Operation iaia sa iaa a Oe eee LET ae ed prato ad Remote Operation Hewlett Packard Interface Bus eta va ER Vues TP v Detailed Operating instructions
31. eer 0 5 V div 20 maximum Input pusilla serie 310 Vrms Z axis l bandwidth 424 e446 es oxae ved etwas de to 10 MHz Sensitivity sans eck oe eio ees aS 4 V pulse 250 nsec wide blanks display maxim m input ici lec e a 5 V peak ac dc 3 88 Model 1980A B Operation Scope Mode Cont d Procedure To select the scope mode press the corresponding key V vs T mode 1 vs 2 mode XYZ mode RUP Program Codes Select scope mode SM lt mode gt mode 1 VvsT 2 1vs2 3 XYZ Example Select 1 vs 2 mode REMOTE SM2 lt CR gt lt LF gt codes identifier indication The selected scope mode is indicated by the lighted scope mode key If the CRT readout is on scope mode is also indicated by the information that is displayed in V vs T both vertical channel and timebase information is displayed In 1 vs 2 mode only vertical channet information is displayed In X Y Z mode there is no CRT readout information displayed Comments in 1 vs 2 mode channel 2 invert is not permitted When the instrument is switched from 1 vs 2 to V vs T mode channel 2 is reset to noninverted display Related Horizontal Mode Sections Vertical Mode 3 89 Operation l Model 1980A B Separation Dual Description When the instrument is in dual sweep horizontal mode the vert cal separation of the main anddelayed sweep traces may be adjusted to improve viewability Dual Separation Characteristics Pange ARH RR leve OCEAN bos 5 00 div to 5 00 div
32. for each parameter is described in table 3 17 Send a command to select the desired output data then address the 1980A B to talk Program Codes Select parameter value to be output OF lt code gt code channel 1 deflection factor channel 2 deflection factor main sweep speed delayed sweep speed channel 1 AV value channel 2 AV value channel 1 position G o al N A channei 2 position 9 dual separation 10 horizontal position 11 main trigger level 12 delayed trigger leve 13 delay time 14 AT value 15 digital delay Select channel 1 position value as data output REMOTE OF7 lt CR gt lt LF gt codes identifier i ho EOS function code The 1980A B outputs E uppercase as the delimiter between the mantissa and exponent in exponential values Control Knob Instrument Status Service Request Condition Trigger Flag Model 1980A B Operation Reading Values Via HP IB Cont d 4mm channel 1 deflection factor channel 2 deflection factor channel 1 AV channel 2 AV main sweep speed delayed sweep speed channel 1 position channel 2 position horizontal position dual separation main trigger level delayed trigger level delay time digital delay Table 3 17 Data Message Output Format Variable Function Output Format sec div Sec div events lt SP gt d dde dd lt CR gt lt LF gt lt SP gt d ddE dd lt CR gt lt LF gt SP dd dd lt CR
33. gt lt LF gt Format and units depend upon the selected trigger source LINE INT SP dd dd lt CR gt lt LF gt EXT 1 SP dddd lt CR gt lt LF gt EXT 10 SP dd dd lt CR gt lt LF gt EXT 100 SP ddd d lt CR gt lt LF gt lt SP gt d d d E dd lt CR gt lt LF gt t9 digits maximum SP t 1d d d E dd CR LF t9 digits maximum lt SP gt d d lt CR gt lt LF gt t 7 digits maximum 3 85 Operation Description Procedure Example 3 86 Model 19804 B Save Recall Eight Save Recall registers are provided for storing instrument configurations instrument state can be saved or recalled from the front panei or via the HP IB To save a front panel configuration call the SPULE SE TT LHS menu with Then select the storage register by pressing the corresponding soft key Then select the storage register by pressing the corresponding soft key To exit either the SAUE SETTINGS or RECALL SETTINGS menu without saving or recalling an instrument option state press ne Program Codes Save settings with SK6 lt register gt register integer d 1 to 8 Recall settings with SK7 register gt register integer d 1 to 8 Save the current front panel settings in register 8 REMOTE SK6 8 lt CR gt lt LF gt codes identifier m pie EOS SAVE register 8 Model 1980A B Save Recall Cont d Operation C
34. iis e eh bx ned en eaa rn aes ludica aa IES GRE un see Codes and Format Summary AA i ETEA Lada sae ET gen uada d Notation Conventions and Definitions T ire ve dens edad args TT PED Operator s CHECKS soaks eo nA tees ees CETERI DICE T EAE Sara fate ba EE Operator s Calibration and Adjustment 0 0 Dida aya otn ie st natin atas Operator s Maintenance filiali T v LT Pa anay T General Operating Instructions Peces MEC M aa O E esos M Powet on lese eee Vans e dae ADT ET EROE i A N E E Simplified Operation 0 Tu TP ih ODER pa E SER EA feet Pawn cw Getting Acquainted Exercise RIA tse Rew Se aa aus Podi SR Aa iae te Sue Using Autoscope trae s AAA EY RA URGE CY AERA ER reg are ad Li Pian Keys and Indications Asha cbe A deba tenia ot Aa ete a sav eidfsudue Changing Values CORRI RAT KA AE A Lariana AU dames Using the Trigger Controls IRE RIO AI II UA a an Using Delayed Sweep enm EREE VA LIA Lat iena Using Delta Volts iii ra ERAN EARUM QUEEN ACIE RAN TOR RN P ES bana Using Dejta Time ss eee A AA LT TTT ess Using Soft Key Menus iii o ao EA A es PE E Using Save Recall ER FECE MCI ERR RIE da dte VT d Des ERR PS l Panel Features ota ole TTT ios V quw R Va ace dala DT Remote Operation Hewlett Packard Interface Bus io doce Robe m ira dd afud t isa Qu
35. is reported All valid program codes for the Measurement System are listed in Table 3 26 Specific format requirements and parameter descriptions are included General Output Data Message Format lt SP gt lt setting value gt lt CR gt lt LF gt During Learn String outputs the instrument sets the EO bus control line true with the last character of the string to indicate end of string All other output Data messages use lt LF gt for the EOS message Table 3 26 includes specific descriptions of output Data message format Refer to the functions READING SETTINGS and INSTRUMENT STATUS program code identifiers OF and OQ respectively Return to Local Press 22 if not in Local Lockout mode Default Conditions Several HP IB parameters are reset at power on and when the iit menu is selected The instrument address and addressing mode however are preserved The parameter default conditions are HP IB local mode Local lockout cleared Unaddressed ROS mask cleared mask O SRO message cleared Status byte register cleared HP IB status advisory enabled Status Byte When no conditions are enabled to cause SRO mask value 0 a single status byte is available that indicates which conditions have occurred since the byte was reset When one or more of the conditions are enabled to cause the SRO message mask value gt 0 as many as 9 separate occurrences can be queued in a status byte register s
36. listen Addressed to talk Sent the Require Service message Address HEIDE menu The address is preset at the factory to 7 decimal 00111 binary General Input Data Message Format lt program code 7 program code lt CR gt lt LF gt format rules The 1980A B sends and receives Data messages in standard ASCII code lt LF gt is used as the End of String EOS message for all input Data messages If several program codes are sent in a Data message all but the last must be delimited by a semicolon Program codes consist of a two character identifier prefix and a parameter field containing zero one or several parameters Unsigned parameters are interpreted as positive values In integer parameters leading zeroes may be omitted Multiple parameters within a program code are delimited by a comma The character E or e is used to delimit the mantissa of exponential parameters Exponential parameters may be entered in scientific or engineering notation In Data messages spaces SP are permitted only following program code identifiers and parameter delimiters The maximum Data message length is 127 characters including CR LF SP comma and semicolon 3 131 Operation Model 1980A B The instrument cannot be unaddressed during input or output Data message transfers If the instrument s unaddressed and then readdressed the data transfer is aborted and a syntax error
37. main timebase is on The delayed timebase and trigger controls are not enabied In main intensified delayed and dual modes the main and delayed t mebases are on The main and delayed sweeps are dependent on each other in two ways Delayed sweep cannot begin until main sweep has been triggered Main sweep cannot repeat until delayed sweep is completed Unlike traditional scopes the 1980A B allows main and delayed sweep speeds to be set independently Also the delay until start of delayed sweep is totally independent of the main sweep speed This allows considerable versatility in waveform measurement and viewing For example the first and last events of a block of serial data can be displayed simultaneously at any sweep speed by triggering main at the first event and delaying delayed sweep until the last event For more information about using the main and delayed sweeps refer to the sections listed at the end of this instruction Select horizontal mode with the following keys MAIA maw o main sweep UNTEN d muso main sweep intensified by delayed Ev Saas delayed sweep UNE dual sweep Program codes Select horizontal mode HM mode gt mode 1 main 2 main intensified 3 delayed 4 dual Model 1980A B Operation Horizontal Mode Cont d Example Select dual sweep horizontal mode REMOTE HMA4 lt CR gt lt LF gt codes identifier mode Indication Horizontal mode is indicated by lightin
38. many special functions for the remote and local operator by redefining the soft keys Inciuded in the menu selections are calibration routines self test routines and a directory of installed options In addition internal enhancement functions are accessed via the soft keys Table 3 20 summarizes the menu tree in the standard 1980A B no options installed Procedure To call the first level menu when the menus are off press ION Menus define the soft keys with labels displayed on the CRT such as soft key TE L key function in present menu When menus are on pressing returns the soft keys to their normal functions E HP IE Program Codes To use menu functions via the HP IB send a series of soft key codes in the same sequence as in front p nel operation SK lt code gt lt code gt code 0 1 2 3 4 5 6 7 8 Example Execute the balance and deiay seif cal routines REMOTE SK0 2 3 CR LF codes identifier Mo RENS a menu selection 3 93 Operation Model 1980A B Soft Key Menus Cont d indication When a menu is on or a menu function is executing GER is lighted Comments If character intensity is less than level 35 when the menus are called with po to level 35 character intensity is preset Calling the soft key menus turns on the CRT readout It also erases any text written on screen via HP IB Related Advisory Messages Sections Character Generator Confidence
39. n t t y x ON d 9 oe mos d d OR n s o 2 lg iE UU UU V s Ra RR oO a 9 or P o9 o3 4 o9 9 o9 om om mos mos OP E Fo 9 903 No 9 Rom eom o4 Fo OR UN PU Ua K KR No mon m KKR asd omo KA s d ss s ok o ON c o9 4 4 3 2 P 8 O9 dos yo Y AK BOR UO 90 Y OX OP OON 8 4 RR 9 OF 4 o4 NR Fo o voc dd o 9 4 9 4 do 4 4 tor o n ng nt BO 9 9 a 99 4 DOR d 3 FON 4 4 sos NR P9 dom o Pos ooo 9 o9 o9 43 9 L RR O9 9 9 A or o4 ow ss Address Recognition Ziea Remote and Local Messages and E Receiving the Sending the Data Message Local Lockout Abort Message Require Service Message Status Byte M Operator s Calibration and Adjustment Delay Time Self cal Tr Vertical Balance CRT Adjustments Probe Compensation Detailed Operating Instructions Using the Detailed Operating Instructions Advisory Messages Autoscope Bandwidth Limit Calibrator Level Character Generator Control Knob Delta Volts Error Messages Horizontal Mode Data Message docete Aa Wok Led a OVARO CORIO Arc sur os de d m Re IS D RU Tene and Clear Lockout Set Local Messages esee ehh hehehe doa Nd LR WR E RO TS ACE POE Mace d Ed OR aae DE VN HORE ACC dS Sr erii d VERE BIG SR pu M o die di MIRI E eg a ANZI ITER IRIS M ESSE ese cs Fie yw hs e S AR awed RO ETE Se RATA ae Bee Lae TR r NA She Rie Se ARRE RARA cee be eee ES A pus ai ASIA eco aa AA A T RU Y cxi epa AUR E M ea d ide Y
40. not triggered In digital delay mode the NOT indicator is disabled Delay Sweep Mode Main Trigger Delayed Sweep Trigger Main Sweep Trigger Flag 3 97 Operation Model 1980A B Sweep Mode Main Description There are three basic modes of main sweep operation Auto start triggered and single These sweep modes can be selected from the front panel or via the HP IB In auto start the main sweep is triggered by an internal oscillator 10 Hz if no trigger signal is present This mode is convenient since it ensures a trace baseline if delayed sweep is off or in auto sweep mode In triggered mode main sweep only occurs after it is triggered Triggered mode is recommended if the trigger repetition rate is less than 10 Hz In single mode main sweep functions as in triggered However after one sweep the sweep circuit must be reset from the front panel or v a HP IB before the next sweep can occur Procedure Select main sweep mode with the following keys PRTC NE auto start triggered single Reset main sweep in any mode by pressing ip CHEP Program Codes Select main sweep mode MM lt mode gt mode gt 1 triggered 2 auto start 3 single sweep 4 reset Example Select triggered main sweep mode LOCAL KEYS REMOTE MM1 lt CR gt lt LF gt codes identifier 3 Lo EOS 3 98 Model 1980A B Operation Sweep Mode Main Cont d indication The main sweep mode is indicated
41. operator for further information refer to the HP IB Status Advisory Detailed Operating Instruction 80 342 Figure 3 11 HP IB Status Advisory 3 24 Remote Mode Remote Capability The instrument communicates on the bus in both remote and local modes In remote ali but a few of the front panel controls are disabled The exceptions are the LINE switch ss cas and the CRT display adjustments When Local Lockout is in effect the return to local key sequence um is also disabled The Control Knob can be enabled and assigned to specific functions white the instrument is in remote mode This allows a local operator to make measurements or change settings under program direction The procedure for this is described in the Control Knob Detailed Operating Instruction The Measurement System can be addressed to listen or talk while in remote mode When addressedto listen the instrument automatically stops talking and responds to Data messages When addressed to talk the instrument stops listening and sends either a Data message or the Status Byte Whether addressed or not the Measurement System responds to the Locai Local Lockout Clear Lockout Set Local and Abort messages and in addition the Measurement System may issue the Require Service message Although the 1980A B does not respond to the Trigger message this message is decoded and available for use by either plug in or internal options 3 20 Model 1980A
42. os o o v maximum input ot oom oa 9 oom 9o 6 OR 9 n n n HF reject LF reject om o4 oa 9 Ro O9 4 o a o Fon n 3 112 7 1 4 div dc to 25 MHz increasing to 3 div at 100 MHz 70 7 div dc to 25 MHz increasing to 1 5 divat 100 MHz 20 00 div to 20 00 div 0 02 major division 3 of reading 0 4 major div 7 500 mV p p dc to 25 MHz increasing to 1 2 V p p at 100 MHz 12 0 V to 12 0 V 20 mV 3 of reading 400 mV 750 mV p p dc to 25 MHz increasing to 120 mV p p at 100 MHz 1 20 V to 1 20 V 2 mV 3 of reading 40 mV 20 relative units 0 02 unit 1 MO x 296 shunted by 15 pF refer to figure 3 22 500 13 shunted by 15 pF refer to figure 3 22 3 dB at 35 kHz 3 dB at 35 kHz Model 1980A B INPUT SIGNAL AMPLITUDE Operation x x T Trigger Main Sweep Cont d 10 L L LTICELHELLLECLICLIIELLHILICOEOTILILEHHLI ILCIICEEEIIHOCOELENMRIECEERHH R VOLTAGE RATING USING 250 Vpk apo T STANDARD HP 10081A Lr EN 10 1 DIVIDER PROBES VOLTAGE RATING FOR CSI DIRECT INPUT 111 nee SEE nani EE H EE LIEN LLL HH I IN quali ATTI ii essere TIT TPN CTA ILL LEES eleal 7 Vpk AO PAI kt YM mr YB E DEI OBEE m Id R Y Sa ia SEI EDE HA MEA E HH SHE 9 H HH HEEE HHH DE HE C HLL CECE TTT SI ft gii v 210 10 10 ent INPUT SIGNAL FREQUENCY Hz Vpk RATING BASED UPON CONTINUDUS SINE WAVE INPUT 1980 161 Fig
43. press fit Program Codes Select trigger view mode TV lt mode gt mode O view off momentary display 1 main trigger view 2 delayed trigger view Example Turn on delayed trigger view puro armi vu REMOTE TV2 lt CR gt lt LE gt codes identifier 3 120 Model 1980A B Operation Trigger View Cont d indication When main or delayed trigger view is on the corresponding key is lighted Comments Only one trigger view main or delayed can be displayed at one time Delayed trigger view cannot be displayed when main horizontal mode is selected The center horizontal graticule line represents the trigger threshold level with respect to the trigger view waveform The timebase in which the trigger view waveform is displayed depends upon the horizontal mode selected table 3 23 Table 3 23 Trigger View Display Timebase Horizontal Mode Main Trigger Delayed Trigger View Timebase View Timebase Main Main Not enabled Intensified Intensified Intensified Delayed Delayed Delayed Dual Intensified i Delayed Related Horizontal Mode Sections Trigger Delayed Sweep Trigger Main Sweep Vertical Mode 3 121 Operation Vertical Coupling Model 1980A B Description Vertical input coupling can be selected from the front panel or via the HP IB Four input configurations are provided AC DC DC 500 and Ground The characteristics of each coupling are listed below Figure 3 25 contains the maximum input
44. the T advisory message is displayed on the CRT If the instrument fails the Confidence Test an error message is displayed in the LED Readout that indicates which failure was detected The test is then aborted the 1980A B executes an autoscope to initialize itself andthe advisory FF Test are listed in table 3 6 7 isdisplayed The error messages that may be displayed duringthe Confidence If no ur is e Md to either input channel when the Confidence Test is executed the A message is displayed on the CRT in addition to the error message Table 3 6 Confidence Test Error Messages No signal found at channel 1 or 2 Horizontal range error 10V range error 1V range error 0 1 range error 0 02 range error If a failure is detected by the Confidence Test the instrument might be useable but it does require servicing At the end of the Confidence Test the Measurement System executes an autoscope on the calibrator signal at output level of 1 Vp p Previous front panel settings are not preserved by this test However the Save Recall registers and HP IB status information are not changed The Confidence Test requires a front panel key closure to execute The test cannot be executed via the HP 1B can not be used to turn off the menus when thei E menu is displayed Model 1980A B Operation 3 46 Memory Check Description There are two memory checks ROM Checksum and RAM Test These checks assure that the 1980A B
45. us div main sweep 10 us div delayed sweep channel 1 main trigger channel 1 delayed trigger 2 V div on channels 1 and 2 and ac input coupling CRT DISPLAY READOUTS displays selected trigger source and selected variable functions l Trigger Source time base main or delayed for channels 1 and 2 external and line Variable Functions channels 1 and 2 voits div and AV main and delayed sweep speeds time delay normal numerical and digital normal and numerical AT and calculated frequency reciprocal of AT 1 AT LED DISPLAY READOUTS all functions related tothe Control Knob are displayed HORIZONTAL POSITION Range 6 major div from center vertical graticule line Resolution 0 02 major divisions Adjustment coarse or fine slew rates DUAL SEPARATION Range delayed sweep waveform can be adjusted 5 major vertical div from main sweep waveform Resolution 0 02 major divisions Adjustment coarse or fine siew rates PANEL INTENSITY adjustable inrelativesteps of 1 from O to 99 GENERAL BUS COMPATIBILITY as defined in IEEE Std 488 1978 is SH1 AH1 T5 TEO L3 LEO SR1 RL1 PPO DCO DT1 CO and E2 SELF CALIBRATION ROUTINES two self calibration routines can be performed at any time without altering front panel setup Balance Self Cal DC balances vertical pre amplifier inputs to minimize trace shift during deflection factor range changes Delay Self Cal calibrates delay time peon to within 0 005 of t
46. voltage derating curve which must be observed for safe operation of the instrument Vertical Coupling Characteristics AC coupled bandwidth Jas ed ie Eee ila el 10 Hz to 100 MHz impedance venuti SE Ka 1 MQ 2 shunted by 16 pF input voltage asili ae REY refer to figure 3 25 DC coupled b ndwidtli andara arca Pa dc to 100 MHz iipedance iii a he Eat 1 MO 12 shunted by 16 pF input voltage ispirare refer to figure 3 25 DC 500 coupled bandwidth 3 5025 acne ves de to 100 MHz impedance ii 500 3 shunted by 16 pF VSW RA alata ta Radeon mee a REE BS typically less than 1 3 1 input voltage Vn O to 5 V rms maximum Ground aav Y eee eee A input connector s disconnected from attenuator attenuator is grounded through 500 Procedure Select the vertical coupling for channel 1 or 2 with the foliowing keys AC coupled DC coupled DC 500 coupled Ground decoupled The instrument accepts coupling key entries only if the channel is on or is a trigger source 3 122 Model 1980A B INPUT SIGNAL AMPLITUDE 250 vek E N 7 Vek ENAN SI m PL ELSE Vertical Coupling Cont d E LT CES ji s x ferree RUD VOLTAGE RATING USING erar daia S STANDARD HP 100B1A wi EHI LUN NOTTI imma 10 1 DIVIDER PROBES 1 TION TH VOLTAGE RATING FOR reni CA DIRECT INPUT 1 1 PROBE o CERRAR p TR i HEH HH HSS TT NO HB ball 9 0 H HHH gis HH AREE BEF BERNIE INTUITO LLLI LL
47. 0 0 V Example Select channel 2 as trigger source negative slope DC coupled with HF reject Palin ULESZS ipxl 905 iwes TURO RICO TERE n Yeon ee REI REMOTE DT 2 5 lt CR gt lt LF gt codes identifier mmml T EOS slope coupling source 3 110 Model 1980A B Model 1980A B Operation indication Comments Related Sections Trigger Delayed Sweep Cont d Set delayed trigger level 1 60 div REMOTE DL 160 CR LF codes identifier d EOS value When the Control Knob is assigned to delayed trigger level is lighted and the trigger source and level value are displayed by the LED readout Trigger source is displayed by the CRT readout and the corresponding source selection key is lighted Trigger siope and coupling are indicated by lighting the corresponding keys At power on DC 500 coupling is changed to DC as a default condition In triggered or digital delay delayed sweep modes the setup time of the delayed trigger circuit must be taken into consideration if delayed sweep is to be triggered on the same pulse edge as main Delayed trigger events cannot be detected until approximately 70 nsec after main trigger The delayed external trigger input has a probe key contact If an external trigger source is connected via a recommended HP 10080 series miniprobe trigger level is displayed as measured at the probe tip including the probe division ratio l A probe key closure at the delayed trigge
48. 1 and 2 on auto alternate display 0 00 div coarse 2 00 div coarse Model 1980A B l Operation instrument Status Ga Description The 1980A B can issue a Require Service message on the HP IB under one or more operator selectable Procedure conditions Whenever the enabled condition occurs it sets both the bit corresponding to the condition and the ROS bit bit 6 in the Status Byte The bits set in the Status Byte are not cleared unless the Status Byte is read by serial poiling or the LINE switch is cycled lf more than one enabled condition occurs before the Status Byte is read the 1980A B queues them eachina separate byte inthe order in which they happened Up to 9 conditions Status Bytes can be stacked in this way The stack must be read byte by byte using successive serial polls Each byte contains an ROS bit so that the instrument will issue and reissue the Request Service message until the entire stack is cleared For applications where the RQS interrupt is inconvenient or unnecessary the Require Service message can be inhibited In this mode a single Status Byte register in the 1980A B traps the occurance of all of the 7 conditions Although the instrument will not issue the Require Service message the Status Byte may still be read by serial polling Supplemental information about status conditions that occur is contained in the status qualifier registers These can be read to determine which error occurred which k
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50. 55 Hz 1 7 General Information Model 1980A B Table 1 1 Specifications Page 4 of 4 ACCESSORIES FURNISHED one blue light filter HP Manual one Binder with Divider tabs two 10081A P N 01980 02701 one 2 3 m 7 5 ft power cord one 10 1 divider probes approx 2 m 16 ft long Expansion Module Panel Cover HP P N 01980 24106 WEIGHT net approx 18 2 kg 40 Ib shipping approx two Operating Programming Manuals one Service 24 1 kg 53 Ib DIMENSIONS 1980A 521 20 8 1 8 Model 1980A B General Information Table 1 2 Recommended Test Equipment Critical Specifications Suggested Model Ie Cable Pair 50 ohm BNC male to BNC male approxi HP 10502A mately 9 inches long Pair must be of equal length Controller HP 1B HP IB compatibility as defined by IEEE Std HP 9825B with 98034A revised 488 and the identical ANS Std MC1 1 Of DC Source Digital Voltmeter DVM Electronic Counter Function Generator LCR Meter Oscilloscope Peak to Peak Source Power Divider Probe Probe High Voltage Sampling Voltmeter Signal Generator Signature Analyzer Time Mark Generator A Adjustments SH1 AHT T2 TEO L2 LEO SRO PPO DCO DTO and C1 2 3 4 5 level O to 100 Vdc accuracy 0 25 range O to 100 Vdc accuracy 10 1 input impedance 10 Mohm range 0 to 10 MHz resolution 8 digit accuracy
51. Codes Enter a key sequence KY lt code gt lt code gt code integer did Key codes are listed in tables 3 15 and 3 16 cial Ern Execute the keystroke sequence ch 1 REMOTE KY 6 62 13 7 47 lt CR gt lt LF gt codes identifier F LL EOS key codes The KY command executes as front panel keystrokes The same indications result as in local operation Although the KY command is interpreted as a keystroke it does not affect the last key code instrument status qualifier E If the last key code is read when no key has been pressed since power on the code 64 is output by the 1980A B Control Knob Delta Time Instrument Status Service Request Condition Soft Key Menus 3 79 Operation CEE Key Cont d Table 3 15 Key to Keycode Conversion Table Display Panel Control Panel Time Panel main main dly d TRG iyi uy d sm gt SEP DELAY ter PNG ad HRS i PS is is not programmable no code is assigned 3 80 main dly d main tdly d main diy dj ton c 7 dly d tS6n pc main main dly dj Model 1980A B Voltage Panel Probe Keys Channel 1 Channel 2 Main Trigger Diy d Trigger Model 1980A B Operation Key Cont d E gt BE ch 1 y i T3UMERICA i main Probe 1 unused Probe 2 esa Main Probe deed Dly d Probe AES unused unused Code 64 means no key has be
52. E 1 MO 12 shunted by 15 pF maximum IDUL ela refer to figure 3 21 DC 500 coupled impedance ir 500 3 shunted by 15 pF maximum INPUT DEEST refer to figure 3 21 HF CEEC aita e ERI E re E E 3 dB at 35 kHz LE t6leBt oom ELSE Dx tei hn bises 3 dB at 35 kHz 3 107 Operation Procedure 3 108 Model 1980A B Trigger Delayed Sweep Cont d a T IAC or DC 205 STE CITT i EFFE S SBR S MAN ww VOLTAGE RATING USING STANDARD HP 10081A 10 1 DIVIDER PROBES 77777 VOLTAGE RATING FOR DIRECT INPUT 1111 PROBE a a iil S H DT D PES een ieee HH H MERI Li Idi i iii x LILLO III H HH y HN HHHH IGE HE EET LU Il NUT MULE TTT piii AS og WIND LLL LL Ke S ET RR ERETTE pus 7 VPK ae d P D LII sb AAA AAA a pt Iii a REA EEE 9 SEO FEE DA 8 9 0 EI FAS RU GR S e 5 8 Palla RIR az ee HE LE 90 a IO E III G R z S E A A DL 1 Bag nei E PT COLTO HAt od DR y tI E ET 11 IL BENI HH i MEX ttt H ii AH HH TT PT LETT is Lut SBS AASI HD 10 10 INPUT SIGNAL FREQUENCY Hz Vpk RATING BASED UPON CONTINUOUS SINE WAVE INPUT Figure 3 21 Maximum Signal Input vs Frequency 21 kHz Select delayed trigger source with the following keys internai channel 1 internal channel 2 external input 10 external input 1 AC coupled AC coupied LF reject DC coupled DC c
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54. IO 3 DIO 2 DIO 1 24 PIN MICRO RIBBON SERIES 57 CONNECTOR 1 AHewlett Packard Interface Bus system may contain no more than 2 metres 6 ft of connecting cable per instrument The maximum accumulative length of connecting cable for any Hewlett Packard Interface Bus system is 20 0 metres 65 6 ft Figure 2 4 Hewlett Packard interface Bus Connection 2 6 Model 1980A B l Installation 2 11 Rack Mounting Rack mounting information is provided with the rack mounting kits If a kit was not ordered with the instrument as an option it can be ordered through the nearest Hewlett Packard Sales office Refer to paragraph 1 8 Mechanical Options for the appropriate part numbers 2 12 STORAGE AND SHIPMENT 2 13 Environment The Measurement System may be stored or shipped in environments within the following limits TEMPORALES sirena era datare JM E DECO OI 55 C to 75 C H midity RR rie lt 95 relative Altitudes solitari ae siii PETERE AO CITATA RE NEI lt 15 300 metres 50 000 feet Protect the instrument from conditions which would cause internal condensation 2 14 Packaging Original Packaging Containers and materials identical to those used in factory packaging are available through Hewlett Packard offices If the instrument is being returned to Hewlett Packard for servicing attach a tag indicatingthe type of service required return address model number and full serial number Also markthe container FRAGILE t
55. Instruction 3 42 Sending the Status Bit Message The Measurement System does not respond to a Parallel Poll Enable PPE bus command it cannot send the Status Bit message 3 30 Model 1980A B Operation UPB BEGIN STATUS CHECK TS SRQ LINE TRUE SERIAL POLL 1980A B READ STATUS BYTE MESSAGE IS BIT 7 RQS TRUE TEST BITS 1 6 8 FOR INTERRUPT CONDITION POLL OTHER INSTRUMENTS CALL CORRESPONDING SERVICE ROUTINE END STATUS CHECK Figure 3 15 Serial Poll Using the Require Service Message ROS Mask Value gt 0 3 43 Receiving the Abort Message The Abort message IFC control line true halts all bus activity When the Measurement System receives the Abort message it becomes unaddressed and stops talking or listening The Require Service message and the Status Byte are unaffected by the Abort message 3 31 Operation Model 1980A B 3 44 OPERATOR S CHECKS 3 45 Confidence Test Description Confidence Test can be executed from the front panel to confirm that the internal 1980A B hardware and Procedure Indication Response Comments 3 32 software is functional This test does not verify that the 1980A B is operating to specifications Only a probe or BNC cable is required to execute Confidence Test Ars DA O m Select the Y menu by pressing To exit the COH menu without performing the test press if the instrument passes the Confidence Test
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57. Line Voltage and Fuse Selection for instructions about setting the line X AXIS INPUT X axis input from HP switches Model 1607A FUSE Select fuse according to applied line voltage Fuse part numbers are listed in table 2 1 of this manual The 1980A B is completely disabled if this fuse burns out The line fuse should not be replaced until the cause of its failure has been determined Z BLANKING INPUT Z axis blanking signal from HP Modei 16074 LINE Receptacle provides a direct Y AXIS INPUT Y axis input from HP grounding connection to the 1980A B Model 1607A chass s through the center contact Available power cordsets are described in paragraph 2 6 AC Power Cable 15 V REF OUTPUT Voltage CAL OUTPUT Frequency reference reference for 1980A B calibration for 1980A B calibration and Source impedance is 1kQ output calibration checks Same as front level is 15 V X 30 mV panel calibrator signal 80 353 Figure 3 10 Rear panel Features Operation Model 1980A B 4mm 3 21 REMOTE OPERATION HEWLETT PACKARD INTERFACE BUS The 1980A 8 Oscilloscope Measurement System can be operated through the Hewlett Packard Interface Bus HP IB Menu functions remote only functions and all front panel functions except those of La LINE switch and the CRT display adjustments are programmable through the HP IB Bus compatibility programming and data format are described in the following paragraphs The notation used in
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59. One value is used in main intensified or dual horizontal modes and in 1 vs 2 and X Y Z scope modes The other value is used only in delayed horizontal mode Procedure To change trace intensity press RR then adiust Control Knob for desired brightness The trace intensity used in delayed horizontal mode 222 must be entered while that mode is selected qm Program Codes Enter trace intensity values CI main delayed gt main integer did delayed integer did Example Set the main trace intensity to 30 and the delayed trace intensity to 45 REMOTE C130 45 lt CR gt lt LF gt codes identifier ana y Tre EOS main intensity delayed intensity Indication When the Control Knob is assigned to trace intensity qd is lighted and the LED readout displays the intensity value Comments For longest CRT life use the lowest trace intensity value that provides a viewable waveform Related Control Knob Sections Intensity Characters and Lamps Horizontal Mode 3 78 Model 1980A B Operation Description Procedure Example Indication Comments Related Sections Key CHE The remote operator can simulate the pressing of front panel keys using the key KY command Although almost every function is addressable using the primary command set the key command can be used as an alternative l Send a series of key codes in the same order as keys would be pressed in local operation Program
60. P 1B IN Recalling settings from Save Recall registers Delay Delta Time Delta Volts Horizontal Position Intensity Character and Lamp intensiy Trace Reading Values Via HP IB Separation Dual Sweep Mode Delayed Sweep Mode Main Sweep Speed Delayed Sweep Speed Main Trigger Delayed Trigger Main Model 1980A B Operation Delay Description The delay from the main sweep trigger until the start of the delayed sweep is expressed in terms of time or trigger events depending upon which delayed sweep mode is in effect This instruction explains how to set the delay factor for each of the delayed modes There are two basic modes for delay time entry from the front panel of the 1980A B Normally the delay time parameter step resolution is determined by the sweep speed of the displayed timebases This is usually the best mode of entry when making measurements on waveforms displayed on screen because the step resolution is proportioned to the displayed waveform A second basis for delay time step resolution is provided by numerical entry mode This mode allows specific delay values to be quickly entered Table 3 9 describes the step resolutions available for delay time entry Delay Characteristics delay time LANGE dose M ES O to 9 999 999 999 9 sec resolution front panel 5 digits 100 psec minimum refer to table 3 9 HPAB iii canina 100 psec accuracy esi vr n en delay time accuracy depends upon delayed sweep spe
61. Program Order Considerations Program Code Format Sending the Data Message Output Data Message Format Learn Mode Receiving the Clear Message Receiving the Trigger Message Receiving the Remote Message Receiving the Local Message Receiving the Local Lockout Message Receiving the Ci Receiving the Pass Control Message Sending the Require Service Message Sending the Status Byte Message Sending the Status Bit Message Receiving the Abort Message Operator s Checks Confidence Test Memory Check HP 18 1 0 Check Table of Contents TABLE OF CONTENTS Cont d e ot nana e er tr m oho 4 3 wo od o oot dod om t o ot ot ass sn esa o ow o2 o moo or 9o i om op 9 F9 Fo 4o e 9 OR d 9 e o9 o t KE K aE won Bom non m 4 OR n a 9 oo 9 o om 9 m 9 n on n9 NT RR raro R ee YO RR KR RRR KERE KRE T RR KS Co ema reed RA ARR ree KETAT ARR LR NK NK RKR KR 60 KR RRR RRR R KLE KN Y AA 468 KE I RE 0 wow Ke Ree E R i n b K 9 Y K iov s none 4 4o do 4 4 t on t n sd Row wow eom o4 odo m mo i OY V9 o FON O amp O 4 o4 d o4 4 o4 OR dor 4 4 R K RR 4 9 OR Oo S Y 9 2 a d mos tor s on 6 n ear Lockout Set Local Message 4 4 i FON dO CO f 4 hoe a 9 4b 298 9 45 44 gt A ee SD SS L1 LL Pa V3 VOV Y Fo 4 o3 4o Eon n d K Ae R 66 tO 9 9 tog o dos Pot 9 t n g a Se EON POE 93 dOP L o 9 o 9 on om
62. QUAINTED EXERCISE press either 1 E to specify the source Otherwise the last internal trigger source is restored The CRT readout displays the selected trigger source Press main and adjust main trigger level with the Control Knob for a triggered display As an adjustment aid the trigger signal is displayed while the Control Knob is turned The center horizontal graticule line represents the trigger threshold level with respect to the trigger signal When adjusting trigger controls begin with the timebases in auto sweep mode so there is a trace displayed For example press ime dly d to put delayed sweep in triggered mode Because channel 1 is selected as the delayed trigger source and the trigger level is misadjusted delayed sweep is not triggered This inhibits main sweep and trigger view making it more difficult to correct the triggering problem Notice that the delayed sweep NOT indicator is lighted The NOT indicators show which sx to return delayed to auto sweep mode sweep is not triggered Press 7 Now select the trigger source and level for delayed sweep Press i trigger signal overlaps the center horizontal graticule line dly d and rotate the Control Knob until In some cases it is desireable to display the trigger signal continuously Press to display main trigger view Ho mew The trigger circuits are both level and edge sensitive Press Y main to toggle the main trigger point b
63. ROS bit bit 7 of the status byte is always false Figure 3 14 contains a typical flowchart for reading instrument status when the Require Service message is disabled if the Require Service message is enabled as many as nine separate occurrences can be queued in a status byte register stack Each byte in the stack has two bits set true The ROS bit bit 7 and the bit correspondingtothe condition that occurred The status register stack is read on a first in first out basis by serial polling the Measurement System repetitively until it does not send the Require Service message If there are more than nine occurrances before the register stack is read the stack will contain the codes for the first eight conditions and for the last condition that occurred Figure 3 15 contains a flowchart for reading instrument status using the Require Service message 3 29 Operation Model 1980A B BEGIN STATUS CHECK SERIAL POLL 1980A B READ STATUS BYTE MESSAGE TEST BITS 1 6 8 FOR ALE CONDITIONS CALL CORRESPONDING SERVICE ROUTINES END STATUS CHECK Figure 3 14 Serial Poll With Require Service Message Disabled ROS Mask Value 0 To supplement the information in the Status Byte there are status qualifier registers that can be read to determine which error occurred which key was pressed etc For more information about using the status reporting features of the Measurement System refer to the Instrument Status Detailed Operating
64. RR RAD RA AE 0 C to 55 C HENGER ob ENG t al dar Vaca e ARCADE VIRA P MA Aen Pd lt 95 relative at 40 C Altitude arie Raabe REN lt 4570 metres 15 000 feet 2 10 Bench Operation The 1980A and 1980B cabinets have plastic feet and fold away tilt stands for convenience in bench operation The plastic feet are shaped to ensure positive alignment when the Measurement System is stacked with other instruments housed in Hewlett Packard System or System Il enclosures The tilt stands raise the front of the instrument for easier viewing of the front panel 2 5 Installation SIGNAL GROUND P O TWISTED PAIR WITH 11 SHOULD BE GROUNDED i P O TWISTED PAIR WITH 10 NEAR TERMINATION P O TWISTED PAIR WITH 9 OF OTHER WIRE OF P O TWISTED PAIR WITH 8 TWISTED PAIR P O TWISTED PAIR WITH 7 P O TWISTED PAIR WITH 6 REN DIO 8 DIO 7 DIO 6 DIO 5 iSO METRIC THREAD M3 5 X 0 6 Logic Levels The Hewlett Packard interface Bus Logic Levels are TTL compatible i e the true 1 state is 0 0 Vdc to 0 4 Vdc and the false 01 state is 2 5 Vdc to 5 0 Vdc Programming and Output Data Format Refer to Section Ill Operation Mating Connector HP 1251 0293 Amphenol 57 30240 Mating Cables Available HP 10833A 1 metre 3 3 ftj HP 10833B 2 metres 6 6 ft HP 10833C 4 metres 13 2 Ft HP 10833D 0 5 metres 1 6 ft Cabling Restrictions Model 1980A B SHIELD A CONNECT TO ATN EARTH SRO GROUND IFC NDAC NRFD DAV EO DIO 4 D
65. SACR RE ATE 3 129 RP IB Codes and Format AA dra Rio E Reo n e aba ee ACD or ied ete ae MLA IA 3 131 APB Capabllitq id otha RTA bed ba ARI Cotes cars PNL Iul seca e dud RU GR 3 131 IDe TB Status Advisory lontani OA ba REN wig wile ARAS AA A 3 131 AMOS a A wien Ra pate an t dau fou p dur dabat ca tree ilaele 3 131 General Input Data Message Format S HERR 3 131 General Output Data Message Format De tated TES irae tahun RR alari 3 132 Return to Local ss Preces rts TO RCM UTE NE NE 3 132 Defaut Conditions sanee osa Sota a a da cal G Z EUS TG E he IN A RT E Pa wa eek E LO 3 132 Notation Conventions and Denton c scialle RR i D Don y als ea 3 137 Sections IV through VIII PERFORMANCE TESTS ADJUSTMENTS REPLACEABLE PARTS MANUAL CHANGES SERVICE These sections are bound separately with a separate table of contents vi Model 19808 List of INustrations Figure 1 1 2 1 2 2 2 3 2 4 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 3 10 3 11 3 12 3 13 3 14 3 15 3 16 3 17 3 18 3 19 3 20 3 21 3 22 3 23 3 24 3 25 LIST OF ILLUSTRATIONS Title l Page HP Modei 1980B Oscilloscope Measurement System and Supplied Accessories 02 000 c eee e eee 1 0 Line Voltage Selection Switches cds OA RARAS ARA EORR y eie A ROS 2 2 Power Cable and Plua Part Numbers tirao p ire ada RR ICE ODES EUR e AQ eee da 2 3 Soft Keys and HP IB ADDRESS MODE CRT Dispiay lare aia dec die ae a eee es 2 4 Hewlett Packard interface Cable
66. SOA dul a AI 3 78 MORET CIT DII A EC uM qase ite E 3 79 Learn MOGE E A r cc E 3 82 Power on Sequence and Default Condon risa da tada 3 83 Reading Values Via HP IB MM cT Exe tio Dated 3 84 Save Recall vd o altus e nliok R ud er ed AA d El ER TS EU eb OS aa T adora d Sx RE Pe E Osee TA qnid 3 86 Scope Medeae tod ss AAA d dari uiu conet bue E pu es CI TITTI STI ETTI 3 88 SOPA NOA Dual sot A e ELE ERREUR liete trae 3 90 Service Request Condtiol sus som xd or ox OP Sa TS IM DOES RITE RE AE REG AUR ART TRE WE 3 91 SOM ROV MENUS oia AE AA e A AA AAA taa waa TRECE 3 93 Sweep Mode DOI E A A o iei dt pA RN 3 96 Sweep Mode Main usada ss a AE AS A TN oa ee 3 98 Sweep Speed Delayed E ere SR RR Ae 3 100 Swe eep Speed Main access sui A e Ra IP od D y 3 102 TONE DIS x Z Z R e a A afose DURAND Rd als AA a Y ote aeta rd aeria e d ev eq PRU a a ew AA Rs 3 104 Trigger Delayed Sweep o do cb ines de atr ORE EN RA Aa E ei Re wee re De 3 107 A Trigger Main WEBS ois dsc VAIO is a EAE R pira nf aed PS E P Nb dd 3 112 A Trigger Flag soto reale ACIES C ra uM WORST 3 117 MIQUEL VIa Pee ee eG AA ae ieri 3 120 Vertical COUDITBE ciues ep lin CR e ds e ta P RERO Eo 3 122 A Vertical Deflection Factor sisi T T Aa Febre ei rar d datar de d E dE aptis e y ANA DAI RIA 3 125 MET Oe VOU css ros a nc lari pe Cuero EA nera te oa cO eds 3 127 Vertical POSSE one Oe ka Rt sto wane ween estos vel dE V Doa LP TR S IRE
67. Service Plug in Internal Request i Option Option Condition Request Request Notes 1 To set the ROS bit and SRO bus control line true the condition must be enabled in the ROS mask 2 if no condition is enabled the 1980A 8 can not set the SRO bus control line nor the ROS bit true However bits 1 6 and 8 of the status byte are set to indicate which conditions have occurred Figure 3 13 The Status Byte and the ROS Mask 3 41 Sending the Status Byte Message The Status Byte message consists of one 8 bit byte in which the bits are set according to the conditions described in figure 3 13 The Measurement System sends the Status Byte message when it is addressed to talk and it receives the Serial Poll Enable SPE bus command from the HP IB system controller After the message is transferred to the controller all bits are cleared by the Serial Poll Disable SPD bus command the Abort message or if the instrument is unaddressed to talk If the instrument is set to either listen only or talk only mode it does not respond to the SPE or SPD commands and can not send the Status Byte The Measurement System has two modes for transferring status information with the status byte If the Required Service message is not enabled that is if the ROS mask value is 0 a single status byte is available from the instrument The bits in this byte are set to indicate ali conditions that have occurred since the byte was last reset In this mode the
68. Test paragraph 3 45 Delay Time Self cal paragraph 3 49 HP IB Address Initialize Key Memory Check paragraph 3 46 Save Recall Vertical Balance Self cal paragraph 3 50 3 94 Model 1980A B Operation Soft Key Menus Cont d Table 3 20 Soft Key Menu Tree Soft Key 8 disabled 1 disabled 2 arn 0 0 t0 0 level 2 Soft Key 0 execute test T 1 execute test disabled 2 execute test disabled 3 3 execute test disabled 3 4 execute test disabled 3 5 execute test disabled 3 6 E execute test disabled 3 7 disabied 2 execute test disabled 3 8 E i p E I 1 bt addressable listen only ftalk only Soft Key O T E E 1 normal function normal function normal function 2 normal function normal function normal function 3 iM z disabled disabled 4 disabled disabled 5 disabled disabted 7 disabled disabled disabled 8 E i normal function normal function OO n ui INTO Pu Pi NOTES 1 reserved for internal enhancement menu 2 reserved for plug in enhancement menu 3 reserved for feature ROM menu 3 95 Operation Model 1980A B Sweep Mode Delayed Description There are three modes of delayed sweep operation Auto sweep after delay triggered sweep after delay and Procedure 1 aj iw Example 3 96 triggered sweep after digital events delay in auto sweep after delay auto sweep mode the delay value determines the time interval from th
69. To select AT mode press EEN while the Control Knob is assigned to delay time If numerical entry mode is selected numerical AT mode is selected with EN When the Control Knob is assigned to AT the 0 0 nsec reference point is set by pressing ES Select Control Knob step resolution with ied To toggle the AT display between units of time and units of frequency press WE AT mode can be turned off by pressing i LZ while the Control Knob is assigned to AT TIE Program Codes Turn AT mode on or off set the zero reference point and assign the Control Knob to AT DZ lt mode gt mode O AT off 1 ATon zeroed Control Knob assigned Select Control Knob resolution RC13 step step O coarse 1 fine 3 60 Model 1980A B Operation Example Indication Comments Related Sections Delta Time Cont d Turn on AT and set the zero reference point at a delay value of 20 usec from main sweep trigger CCC perar Gni m AMAT n sai AMIR CALS L7 ena E Fore 2 0 El REMOTE DY20 0e 6 DZ1 lt CR gt lt LF gt codes identifier p pum EOS delay value mode identifier When AT mode is on the LED and CRT readouts display the AT value instead of delay The LED readout displays 10 39 when AT is zeroed For specified accuracy the Delay Time Self cal should be executed within one hour before AT measurements are made Although the DZ command assigns the Control Knob to AT it does not select numer
70. Within 10 C of calibration temperature For temperatures beyond 10 C and within O to 55 C add 196 for sweep speeds from 5 nsec div to 500 msec div add 2 for sweep speeds from 500 msec div to 1 sec div Du and adjust main sweep speed with the Control Knob Procedure Press Select fine or coarse step resolution with par In coarse steps are in a 100 150 200 300 900 sequence In fine steps are change of 1 in least significant digit 4E Program Codes Enter the main sweep speed vaiue MS lt value gt value exponential n ddind d ndd Eje lt SP gt lidid 5 00e 09 to 9 99e 00 sec div 3 102 Model 19804 B Operation Example Indication Comments Related Sections Sweep Speed Main Cont d Change main sweep speed to 1 msec div main REMOTE MS 1 00e 03 lt CR gt lt LF gt codes identifier Ca EQS sweep speed value Main sweep speed is displayed by the CRT readout When the Control Knob is assigned to main sweep speed SECS ma is lighted and the parameter value is displayed by the LED readout Also the CRT readout indicates Control Knob assignment by displaying Hz in inverse video lf main sweep speed is much less than delayed sweep speed the 1980A B displays the advisory LMS HOLDBOFE EY SLO PRIM SH when da is pressed and when the main or delayed sweep speed is changed When automatic vertical display mode selection is enabled cause chop mode to be se
71. Y operation are in the following paragraphs i symbol Instructions for HP iB Remote Operation Hewlett Packard Interface Bus page 3 18 presents a complete description of the instrument s bus implementation lt covers bus compatibility HP IB message response general Data message input and output format rules and many other basic bus considerations Detailed Operating Instructions page 3 40 explain how to program instrument functions and make bus controlled measurements Specific format rules and any special programming considerations are described Each instruction includes a programming example for reference Table 3 2 indexes the Detailed Operating Instructions by function HP 1B Codes and Format Summary page 3 131 condenses the programming information for the instrument It is a quick reference for the experienced remote operator The summary lists ali program codes by function and includes a complete description of parameter range and format Notation Conventions and Definitions page 3 137 explains the syntax conventions used in the manual 3 5 Operator s Checks This section includes procedures that allow the operator to make a quick evaluation of instrument operation The following checks are provided Confidence Test page 3 32 is a menu function that assures most of the instrument is operating properly This procedure only requires a probe or BNC cable Memory Check page 3 33 is a menu function that verifies the
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73. aid it indicates a failure that requires the attention of qualified service personnet Table 3 11 lists the error conditions that can be detected The instrument can be programmed to send the Require Service message when an error condition is detected The condition can also be read by the system controller refer to the Instrument Status Detailed Operating Instruction Table 3 11 includes the HP IB codes for the various error conditions When an error is detected the LED readout displays an error message such as Err 33 If an error occurs during the balance self cal RAM test ROM checksum or Confidence Test the error message is displayed briefly in the LED readout Then the procedure terminates and displays If a cal factor or horizontal word output error occurs the error message is displayed inthe LED readout until any key except ix is pressed Ed which is displayed on the CRT when an error is detected during any of the procedures described in paragraph 3 44 Operator s Checks The HP IB code 25 is sent for many of the error conditions It is the code for the advisory Fi ir instrument Status Remote Operation paragraph 3 21 Operator s Checks paragraph 3 44 Power on Sequence and Default Conditions Service Request Condition Model 1980A B Operation Error Messages Cont d Table 3 11 Hardware Error Codes ROMO Failed checksum ROM 2 Failed checksum ROM 4 Failed checksum ROM 6 Fai
74. al failure indicates the Measurement System should be checked by qualified service personnel the accuracy of measurements taken with the instrument are not impaired 3 39 Operation Model 1980A B 3 51 CRT Adiustments Description Controls are provided on the front panel of the 1980A B for operator adjustment of the CRT display Because Procedure trace alignment with the graticule is affected by the orientation of the instrument with the ambient magnetic field the display may have to be realigned after the instrument is installed or moved The ASTIG and FOCUS controls may have to be periodically adjusted for optimum focus Trace Alignment With no signal applied to either vertiai channel input press Using a small screwdriver or alignment tool adjust the front panel ALIGN control on CONTROL panel for best alignment of trace with horizontal graticule lines Astigmatism and Focus Set trace intensity to level 22 press and adiust with the Control Knob laz Select 1 vs 2 scope mode press i wif Ground channel 1 and 2 inputs press pus Adjust ASTIG control for best spot shape i e most radially symetric spot Adjust FOCUS control for smallest spot and for well defined characters 3 52 Probe Compensation Description Probe compensation may be required because of variations in total input resistance and capacitance from one Procedure instrument or input to another To compensate a probe p
75. alk until it receives an Abort message IEC another instrument s talk address OTA its own listen address MLA or a universal untaik command UNT if the status advisory is enabled it indicates on the CRT when the instrument is addressed to talk 7 or addressed to listen i The Measurement System is shipped from the factory in the addressable mode with its talk and listen addresses setto 7 ie T7 and L7 Refer to table 3 30 for equivalent address codes The instrument can also be configured in the talk oniy or listen only mode These modes enable limited bus operation without an HP IB system controller The instrument s address and addressing mode may be displayed or changed from the front panel using the soft keys Complete instructions for these procedures are in the HP IB Address Detailed Operating instruction Listen only Mode If the instrument is set to listen only mode it is always configured as a listener and responds to ali Data messages sent on the HP IB However it cannot output Data messages and it is inhibited from responding to the Remote Local Local Lockout Clear Lockout Set Local or Abort messages Also it is disabled from issuing the Require Service message and cannot respond to a serial poll Note in listen oniy mode the front panel is enabled the instrument does not enter remote mode Therefore settings can be changed while a program is executing Taik only Mode If the Measurement System is se
76. alue is the sum of the weights of the conditions that are to be enabled The value 64 is assignedto the ROS bit and does not affect the interrupt mask If itis not added into the total mask value it will be assumed by the instrument The mask value of 0 inhibits the Require Service message but enables ail conditions to be read in a single Status Byte message Table 3 19 ROS Mask Value for Service Request Conditions HP IB Syntax Error l Key Closure except sae uo End of Sweep after SG command 1980A B Advisory or Error Message Internal Option request Plug in Option request Enable the Require Service message upon closure of 52 or detection of HP IB syntax error REMOTE 1M129 CR LF codes identifier tE EOS mask value 3 91 Operation indication Comments Related Sections 3 92 Model 19804 B Service Request Condition Cont d There is no indication of the mask value being entered However when an enabled service request condition occurs the HP IB status advisory displays until the status byte message is read by the controller The interrupt mask is reset to 0 no conditions enabled at power on and when the Hi IE ADRESS MODE menu is displayed Advisory Messages Error Messages instrument Status Key Remote Operation paragraph 3 21 Trigger Flag Model 1980A B Operation Soft Key Menus Description The soft key menus provide
77. andwidth limit is on Scope Mode Trigger Delayed Sweep Trigger Main Sweep Vertical Coupling Vertical Deflection Factor 3 49 Operation Model 1980A B Calibrator Level Description A signal at the front panel calibrator terminal for use when adjusting probe compensation The calibrator signal is also available through a BNC connector on the rear panel The normal calibrator output waveform is a 1 V p p square wave Signal amplitude can be changed via the HP IB for calibration checks at other levels Calibrator Characteristics Frequency ys x REN CHE TA RE 1 86 kHz square wave PISO OB coo ed Ds nc o MS EARN Ros p lt 5 usec amplit de ce er dC ed Cox xxm RR EAR 10 V p p 1 1 V p p 11 200 mV p p 1 100 mV p p 1 20 mV p p 2 source impedence ocooomomoooommo 50n Procedure Calibrator output level can only be changed via the HP IB Program Codes Select calibrator output level CL level gt level 1 20 mV p p 2 100 mV p p 3 200 mV p p 4 1Vpp 5 10V p p Exampie Set calibrator output to 10 V p p REMOTE CL5 lt CR gt lt LF gt codes identifier i Tari EOS level 3 50 Model 1980A B Operation Calibrator Level Cont d Comments The calibrator output amplitude is reset to its default value of 1V p p by the following Power on Executing autoscope Executing preset HP IB IN ROM Checksum RAM Test Confidence Test _ Calibrator level cannot be store
78. anual are performed with power supplied to the instrument while protective covers are removed Energy available at many points may if contacted result in personal injury Any adjustment maintenance and repair of the opened instrument under voltage should be avoided as much as possible and when inevitable should be carried out only by a skilled person who is aware of the hazard involved Capacitors inside the instrument may still be charged even if the instrument has been disconnected from its source of supply SAFETY SYMBOLS A Instruction manual symbol the pro duct will be marked with this symbol when it is necessary for the user to refer to the instruction manual in order to protect against damage to the product Indicates hazardous voltages Earth terminal sometimes used in manual to indicate circuit common connected to grounded chassis The WARNING sign denotes a haz ard It calls attention to a procedure practice or the like which if not cor rectly performed or adhered to could result in personal injury Do not pro ceed beyond a WARNING sign until the indicated conditions are fully understood and met WARNING The CAUTION sign denotes a haz ard It calls attention to an operat ing procedure practice or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Do not proceed beyond a CAUTION sign until the indi
79. as no blue function the shift is ignored Advisory messages provide supplemental operat ng information They are displayed momentarily on the CRT when invalid The advisory operations are attempted or when certain special conditions are in effect For an example press 4 RESI is displayed to indicate the key has no function in the current operating mode A description of all advisory messages and suggested response is contained in the Advisory Messages Detailed Operating Instruction Primary variable function parameters are displayed in the CRT readout Figure 3 3 describes the readout display when channel 1 and 2 and both main and delayed timebases are on 3 13 Changing Values Parameter values of variable functions are changed with the Control Knob The Control Knob s a digital control with an analog feel Values set by the knob are stored in nonvolatile memory so they are not lost when instrument power is cycled off and on 3 7 Operation Model 1980A B GETTING ACQUAINTED EXERCISE Channel 1 deflection factor value Channel 2 deflection factor value Delayed trigger source Delay vaiue ontrol knob is assigned to delay Main trigger source Delayed sweep speed value Main sweep speed value Figure 3 3 The CRT Readout M asas Executing autoscope assigns the Control Knob to main sweep speed To indicate this selection ES main is lighted andthe LED readout displays the main sweep
80. aseline displayed in absence of a trigger signal triggering is same as triggered above approx 10 Hz Single sweep occurs once with same triggering as Triggered mode reset key rearms sweep DELAYED SWEEP Auto Sweep After Delay delayed sweep starts at end of delay time Triggered Sweep After Delay delayed sweep can be triggered after delay time Digital Delay delayed sweep starts a specif ed number of events after start of main sweep SOURCES Selectable from Channel 1 Channel 2 Enhancement Module or External Line frequency tr ggering is also available for main sweep only Main and delayed trigger sources are independently selectable INTERNAL TRIGGER LEVEL Range 20 major divisions from center horizontal graticule line Resolution 0 02 major divisions coarse or fine slew rates Accuracy 396 of reading 0 4 major div EXTERNAL TRIGGER LEVEL Range 1 1 2 V from ground reference in 10 12 V from ground reference Resolution 1 2 mV in 10 20 mV coarse or fine slew rates Accuracy 3 of reading 40 mV in 10 mode 3 of reading 400 mV LINE TRIGGER LEVEL Range 20 relative units Resolution steps of 0 02 fine or coarse slew rates SLOPE triggers on positive or negative slope within specified trigger signal range SENSITIVITY Internal for deflection factors 10 mV div at least 1 4 div of vertical deflection from dc to 2b MHz increasing to 3 div at 100 MHz for deflection factor
81. b HP IB Status Advisory initialize intensity Characters and Lamps Soft Key Menus Text Display 3 53 Operation Modei 1980A B Control Knob Description The Control Knob is used to change the value of variable function parameters such as sweep speed deflection Procedure 3 54 factor trigger level and delay The knob is assigned to a variable function by pressing the corresponding key As the knob is rotated the value is immediately changed The Controi Knob is a stepping control either coarse or fine step resolution can be selected in coarse the speed of knob rotation affects the step size so that changes can be quickly made Fine provides vernier like control where step size is set for maximum resolution Accidental changes to parameters can be prevented by selecting hold mode In hold the knob is not assignedto any variable function The Control Knob can also be assigned to variable functions via the HP IB In this special case the knob is enabled for local operation even if the 1980A B is in remote mode This allows the selected function to be adjusted from the front panel while all other keys and functions remain in remote To assign the Control Knob to a function press the corresponding variable function key trace intensity E INTER E true panel intensity irem character intensity ch 1 or 2 ich 1 or 2 main or diy d main or dly d deflection factor vertical position sweep sp
82. can display channel 1 channel 2 or both channels 1 and 2 Also the algebraic Procedure sum of channels 1 and 2 can be displayed Multiple waveforms are displayed using alternate or chop display mode in alternate traces are displayed on alternate sweeps Chop mode displays all traces during each sweep by switching between vertical and horizontal signal sources at a 400 kHz rate The display is blanked during switching time When automatic selection is enabled multiple traces are displayed in alternate for sweep speeds slower than 1 msec div and in chop for sweep speeds faster than 1 msec div 1 2 mode allows a composite waveform to be viewed It provides a differential mode of operation when channel 1 or 2 is inverted Differential Mode Characteristics DOM a re UOI desa dc to 20 MHz A cov Eddy su iN recu ds 20 dB with common mode signal amplitude equivalent to 1O div and one channel adjusted for optimum rejection to toggie channel 1 on or off Press to toggle channel 2 on or off Press to display the algebriac sum of channel 1 and 2 To return to normal channel display press Program Codes Select vertical mode VM lt mode gt mode channels 1 and 2 off channel 1 oniy channei 2 oniy channel 1 channel 2 channels 1 and 2 on A N gt 3 127 Operation Example Indication Comments Related Sections 3 128 Model 1980A B Vertical Mode Cont d Select mode of display
83. cated conditions are fully understood and met CAUTION Model 19808 Table of Contents TABLE OF CONTENTS SECTION I GENERAL INFORMATION INTrOGdUction Li EE MET oS see diana i TRUM Mardi S spud lage toon n Er eas 2e 41 41 SpecificationS eta lio E a voe adu rau IA Sewer e Safety Considerations ooooooooooos vocate dace a we a em to to H a VIS e eem en aa IT Mae uae Lera We Instruments Covered By Manual LH ai TROMPE atri 1 2 Description eil e OU ale aac AN Options iaia A Electrical Options Mechanica ODHOS s e K T ER troia REN A OC ER ET i T LUI WDR EU sek rdg nene Davee ies Hewlett Packard Interface Bus HP 1B Compatibilidad de Vivas APARATOS ora ilaele wud oe ee ees EA AAA RIADA OA 1 4 Accessories Supplied aE RR ed Aa VEA 1 4 Equipment Available o oooooooommrorrso Recommended Test Equipment e e cee ce ee eee eee E UE QU PE MMC ERE Id e 1 4 SECTION Il INSTALLATION introduction paradas Aa initial TASPSCtoni ao ias A Preparation Fer Use sitas Diele cavis cut CER 1S o Oe eee isa ap dane Race Aca ila 7 Power Requirements RNC OE RE ALONE RA EN E AAN eic e e Poets PET E DTE e Line Voltage and Fuse Selection AC Power Cable Luigina Deb Eve EA URSI UE RUE ACER CR et ban vb Mid twee lt lt ONERE CTE Ra etd HP IB Address Selection eap een ebrei vs alis Sod ac Re rata ice tarata uec ad da vd Mating Connectors Coaxial CORDODCEDIS
84. ce main and delayed channel 1 Main sweep speed 50 0 usec div Delayed sweep speed 5 00 usec div Vertical deflection factor all channels 2 00 V div In remote operation customized autoscope routines controller driven can be implemented using the trigger flag Refer to the Trigger Flag Detailed Operating Instruction Reading Values Via HP IB Trigger Flag 3 47 Operation 3 48 Autoscope Cont d Table 3 8 Autoscope and Selective Autoscope Preset Conditions instrument Function After Autoscope After Selective Autoscope Advisory Messages Bandwidth Limit Calibrator Level Control Knob Assignment Character Generator Delay Delta Time Delta Volts channel 1 channel 2 Horizontal Position Horizontal Mode HP 1B status advisory Intensity Characters intensity Panel Lamps Intensity Trace Scope Mode Separation Dual Soft Key Menus Sweep Mode Delayed Sweep Mode Ma n Sweep Speed Delayed Sweep Speed Main Text Display Trigger Delayed source siope level internal level external 10 or 1 coupling Trigger Main source slope level internal level external 10 or 1 level line coupling Trigger View Vertical Coupling Vertical Deflection Vertical Mode Vertical Position no change off 1 V p p main sweep speed on O sec coarse off off off 0 00 div coarse main no change 7096 coarse 9096 coarse 2596 coarse VvsT 3 0 div no change auto sweep a
85. cessing time in a given application use the learn string and save recall registers to establish instrument configuration When sending a series of program codes to the 1980A B processing time can be reduced by combining them into as few Data messages as possible For example note the execution time for the last two Data messages in table 3 5 Program Code Format Program codes consist of a two letter function identifier i e prefix and a parameter field Suffixes are not used in 1980A B program codes The two letter identifier is a mnemonic that defines the major instrument function being addressed Depending upon the identifier the associated parameter field may contain zero one or multiple parameters The general rules of program code format are The 1980A B sends and receives Data messages in standard ASCII code The instrument responds equally to upper and lower case characters Parameter fields containing multiple parameters require a comma to delimit individual parameters Program codes are space sensitive Within program codes spaces are accepted only immediately following function identifiers or parameter delimiters Exponential numeric entries use the character E or e as a delimiter between the mantissa and the exponent spaces may follow E e or comma Program code parameters are of five types these are integers decimals exponentials ASCII character strings and binary data Integer decimal and exponen
86. content and operation of ROM and RAM memory No additional equipment is required HP IB 1 0 Check page 3 33 confirms that the Measurement System responds properly to ali HP IB messages This check assumes that local operation has been verified with the Confidence Test and Memory Check procedures An HP IB controller interface and connecting cable are required 3 6 Operator s Calibration and Adjustment This section provides several procedures that should be used periodically to ensure measurement accuracy Each procedure includes a brief description of the adjustment andthe recommended calibration cycle The following procedures are provided Delay Time Self cal page 3 38 is a menu function that automatically nulls drift in the delay circuits The Delay Seif cal routine should be executed before all critical measurements where the highest resolution and accuracy are required 3 2 Model 19808 i Operation Vertical Balance Self cal page 3 39 is a menu function that nulls the offsets within the vertical amplifiers Execute this routine if trace baselines shift as vertical deflection factor is changed CRT Display Adiustment page 3 40 explains how to set trace alignment focus and astigmatism Probe Compensation page 3 40 describes how to adjust the low frequency compensation of probes used with the Measurement System 3 7 OPERATOR S MAINTENANCE The only instrument maintenance an operator needs to perform is to occasionally cl
87. cording to the Learn String contents Note During the transfer of the Learn String the instrument can not be readdressed If it is the transfer will be aborted The 80 byte string should be sent or read by the controller using a technique that does not readdress bus devices For more information about using the Learn String refer to the Learn Mode Detailed Operating Instruction 3 33 Receiving the Clear Message The Measurement System does not respond to the Clear message However the instrument can be placed in a known state using the Preset menu function HP IB IN program code Refer to the Initialize Detailed Operating Instruction for more information 3 27 Operation Model 1980A B 3 34 Receiving the Trigger Message The 1980A 8 does not respond to the Trigger message GET bus command although the message is received and available to internal and plug in options 3 35 Receiving the Remote Message The Remote message has two parts First the remote enable bus contro line REN is held true then the device listen address is sent by the controller The Measurement System is enabled to go into remote when REN goes true but it does not actually switch into remote until addressed to listen the first time No instrument settings are changed by the transition from local to HP IB status advisory to indicate remote mode 3 36 Receiving the Local Message The Local message returns the Measurement System to front pane
88. cuits It can also be used as a third channel to display reference waveforms However trigger view should not be used as a measurement channel Trigger view has two operating modes Normally main or delayed trigger view is displayed only while the trigger level for that sweep is being changed with the Control Knob If desired trigger view can also beturned on continuously from the front panel or via the HP IB Procedure To toggle main trigger view on or off press Gel To toggle delayed trigger view on or off pressi po Program Codes Select trigger view mode TV lt mode gt mode O view off momentary display 1 main trigger view 2 delayed trigger view Example Turn on delayed trigger view divo REMOTE TV2 CR lt LE gt codes identifier EOS mode 3 120 Mode 1980A B Example Comments Related Sections Operation Trigger Flag Cont d e Enter maximum sweep wait time SW factor 1 gt lt factor 2 gt lt factor 3 gt factor 1 integer ddd O to 000 units of 23 usec factor 2 integer ddd O to 999 units of 5 84 msec factor 3 integer ddd 0 to 999 units of 1 5 sec Program the trigger flag to detect a trigger from the delayed trigger source during delayed sweep Set maximum wait time 40 6 msec and enable sweep l REMOTE codes TF1 SW242 6 0 SG lt CR gt lt LE gt identifier L EOS fiag mode identifier enabie sweep timeou
89. d in the Save Recall registers nor is it changed when an instrument state is recalled Related Probe Compensation paragraph 3 50 Sections 3 51 Operation Model 1980A B Character Generator Description The character generator displays the CRT readout advisory messages and soft key menus It can also be Procedure 3 52 programmed via HP IB for special text displays This instruction describes the CRT readout and some general considerations about using the character generator Primary vertical and horizontal parameter values and the trigger source selections are displayed by the CRT readout When the Control Knob is assigned to one of these functions the function name is displayed in inverse video Figure 3 18 contains a typical readout display Figure 3 18 The 1980A B CRT Readout The character generator writes all characters during the main and delayed sweeps In other words characters are multiplexed with the traces Although this technique provides a high quality character display at some sweep speeds it may interfere with the trace display For example press the key sequence E A and change main sweep speed to approximately 6 msec div with the Control Knob The holes in the traces are caused by the character generator Press di and the holes disappear The following steps can be taken if the character generator interferes with measurements Reduce the number of displayed traces to fewes
90. de equivalent to 10 div and one channel adjusted for optimum rejection TRIGGER VIEW Display internal or external trigger signal for either main or delayed sweep Deflection Factor internal approx deflection for selected channel ext 10 600 mV div 20 ext 1 60 mV div 20 External Trigger Signa Delay lt 4 ns with identically timed signals to a vertical channel and either main or delayed trigger inputs Trigger Point approx center horizontal graticule line Momentary trigger signal is displayed while main or delayed trigger level is adjusted HORIZONTAL DISPLAY MODES V vs T Main Main Intensified Delayed and Dual Dual simultaneously displays main intensified and delayed sweep for all displayed channels MAIN AND DELAYED TIME BASES RANGE 5 ns div to 1 s div RESOLUTION 3 digits ADJUSTMENT coarse stepping is in a 100 200 300 900 sequence fine stepping is a change of 1 in the least significant digit ACCURACY 5 ns div to 9 99 ns div center 8 div 10 ns div to 9 99 ms div first 10 div 10 ms div to 1 s div first 10 div Within 10 C of the temperature at which the instru ment was calibrated For temperatures beyond the 10 C range and within O to 55 C add 1 from 0 5 s div to 1 s div add 296 SWEEP DELAY Delay can be measured by either time or a number of events TIME DELAY RANGE O to 9 9999 s Resolution displayed 5 digits HP IB 100 ps at any delay
91. deflection factor coarse step resolution bum ch2 REMOTE RC7 0 lt CR gt lt LF gt codes identifier oy 9 i crinali EOS assignment code step resolution 3 55 Operation indication Comments Related Sections 3 56 Model 1980A B Control Knob Cont d Control Knob assignment is indicated by lighting the corresponding variable function key Also the LED readout displays the parameter value of the function The LED readout displays Hold _ to indicate hold mode is selected If the Control Knob is rotated while in hold the advisory CONTECH KHOE IH HOLT is displayed When the Control Knob is assigned to a variable function displayed by the CRT readout the function name is displayed in inverse video 2 PINE pen lights to indicate that fine is selected The Contro Knob defaults to hold mode when the 1980A B makes the remote to local transition Executing autoscope or selective autoscope assigns the Control Knob to main sweep speed If the 19804 Bis in remote mode the Control Knob is enabled as though the program code RC3 0 was sent Executing preset HP IB IN in remote or local mode assigns the Control Knob to trace intensity If the 1980A B is in remote mode the Control Knob is enabled as though the program code RC16 0 was sent Control Knob step resolution for a variable function may also be changed by the following Executing autoscope Executing selective autoscope Executing preset H
92. e equivalents refer to table 3 30 2 3 instaliation Model 1980A B To change the HP IB address press When the desired address is displayed press E Note The HP 1B address is stored in nonvolatile memory Therefore the address value is not affected by power down It can only be changed through the front panel key sequence Y SYSTEM Figure 2 3 The Soft Keys and the HE 1E FIT 2 8 Mating Connectors Coaxial Connectors Coaxial mating connectors used with the Measurement System should be 50 ohm BNC male connectors HP IB Interface Connector Interconnection data for the Hewlett Packard Interface Bus is provided in figure 2 4 Chassis Ground The front panel chassis ground jack will accept a standard banana plug The rear panel chassis ground binding post accepts a standard banana plug or an 18 gauge wire 2 9 Operating Environment Do not block the instrument fan or ventilation holes At minimum 1 16 inch 0 2 cm clearance should be provided around the top bottom and sides of the instrument 2 4 Modei 1980A B installation Table 2 2 ASCII Address Codes to Decimal Equivalents UAE ASCH Address Codes Decimal LISTEN TALK Equivalents i J K L M N Z 0 D P 1 Q 2 R 3 S 4 T 5 U 6 V 7 W 8 X 9 Y Z lt 28 29 gt 30 T Indicates factory set address The operating environment should be within the following limitations Temperature eso ES re i a RIA HE
93. e information refer to the Service Request Condition Detailed Operating Instruction The Instrument Status Detailed Operating Instruction explains how to read the advisory code via the HP IB Table 3 7 includes the HP IB codes for the advisory messages The code for the HP TE SYNTH service request HP IB syntax errors are handled separately refer to the HP IB Syntax Errors Detailed advisory can not be reported via HP IB nor can this advisory cause a Operating Instruction for more information Character Generator Error Messages HP IB Status Advisory HP IB Syntax Errors Instrument Status Service Request Condition 3 43 Operation Modei 1980A B Advisory Messages Cont d Table 3 7 Advisory Message Description Page 1 of 2 Advisory Message Description i there is no menu display for the option selected For more information refer to the operating information supplied with the option the deflection factor polarity or coupling of a vertical channel cannot be changed from the front panei while the channel is off cannot be changed from the front pane while the delayed sweep is off Instrument must be in V vs T mode and in intensified delayed or dual horizontal mode U although the trigger qualifiers for the delayed sweep may be changed while it is in auto sweep mode this sweep mode does not require a trigger signal D the key pressed was not accepted either the function is not allowed
94. e main sweep trigger until the delayed sweep begins The delay time circuit is calibrated so that delayed sweep can start from O to 9 99 sec after the main sweep trigger In triggered sweep after delay triggered mode the delay value determines the time interval from the main sweep trigger until the delayed sweep trigger circuit is armed This mode provides a time referenced trigger holdoff in digital delay mode the delay value is expressed as trigger events The delayed sweep begins after the specified number of delayed triggers have ocurred This mode is useful when examining clocked serial data Select the delayed sweep mode with these keys auto sweep triggered sweep SRN digital delay Both main and delayed sweep can be reset by pressing Program Codes Select delayed sweep mode DM lt mode gt mode triggered sweep auto sweep 3 digital delay N Select triggered delayed sweep mode REMOTE DM1 lt CR gt lt LF gt codes identifier TT Lm EOS mode Model 1980A B Indication Comments Related Sections Operation The delayed sweep mode is indicated by lighting the corresponding key In auto sweep and triggered sweep modes the delay value is expressed in terms of time The CRT readout displays Pli fm lt delay gt In digital delay mode delay is expressed in terms of events and the CRT readout displays Pig IMij lt delay gt The NOT indicator is lighted if main sweep is armed and
95. ean the CRT contrast filter and the instrument front panels using a soft coth and either a commercial glass cleaner or a miid soap and water solution WARNING Do not remove covers Internal parts present an electr cal shock hazard Refer servicing to qualified service personnel CAUTION Do not use chemical cleaning agents or abrasive cleaners that might damage the plastics in this instrument Recommended cleaning agents are sopropyl alcohol kelite 1 part kelite 20 parts water or a solution of 196 mild detergent and 9996 water l uonoejes epoui DuisseJppe pue sseJppe 1deoxe 1jnejep suonipuoo gi di iv pajgeua aie sebessaw JOSIApy Ho peuini ase snueyy 0 pabueyo eje sButrjdnoo 1688153 10 peoniaa WUO Z pue euueyo OG Pr psu uo os 90 Auy SUOISIAID Jofew Gi x abuey uonisog EINA ae suonipuoo 3 nejep A391140 ayy uononasur Bungiado pepgeleg suollpuo ynejag pue eouenbeg uO 49 O0g ayi ui pequosep sue ena indNI 3AVM 3NIS SNONNIINOI NOd 09599 SNIIVH AJAX Z pue jauueyo s u1o suondeoxe eui parowa sem amod aut ji SI 1801 HO p9U21IMS SBM y 910190 peu ub NID A OL O MP AW Z eBuey uonoejeq ILAA H sBunies BLUES BU UNA uo SUINI WSIS S 1ueuiajnseeyy eu UONEINBIUOS uo 19MOd A3Nann3ud WNSIS MANI l l DI QUI 0 T l l NO 01 YOHMS INI Jeuged 1u04J eui Jes uay A TLF Ols ATLE pe Buey 99inos euJa1xe ajqeo iamod ui Bnjd E SUOISIAID olew oz ebuey 894N0S jeUIJSIUI enpoui peAejap p
96. ed value and delay time as described in table 3 10 delay jitter 0 002 of delay time events delay Pangea sviene O to 99 999 999 events resolution 2 2 rns 1 event maximum rep rate 15 MHz with 5096 duty cycle Table 3 9 Delay Time Step Resolution front panel Horizontal Coarse Step Fine Step Mode Resolution Resolution Numerical all modes Second most sig Least sig digit digit Normal intensified 0 03 X main 0 0001 X main sweep speed sweep speed delayed 0 03 X delayed 0 0001 X delayed sweep speed sweep speed Normal dual 0 03 X main 0 03 X delayed sweep speed sweep speed 3 57 Operation Model 1980A B Delay Cont d Table 3 10 Delay Time Accuracy Delayed Sweep Speed Vaiue 5 to 9 99 nsec div 210 nsec div 200 usec 12 nsec 0 1 of 2 nsec 0 1 delay reading value 10 of sweep speed value 0 05 of delay value t 0 05 of delay value 10 of sweep speed value Guaranteed within 60 minutes after execution of Delay Time Self cal at constant ambient temperature Procedure To enter a delay value press and rotate the Control Knob n l SECAS dan To enter delay time values using the numerical entry mode press B ped Press Bed to select step resolution for delay time numerical or normal entry mode or digital delay entries Zero the delay value by pressing Program Codes Enter delay time value when the delayed sweep is in auto or triggered sw
97. eed trigger levei horizontal position dual separation eSB ES AY ATH EMERG RC B Eli EL RG E delay time or digital delay time numerical Toggle Control Knob between fine and coarse step resolution by pressing To select hold mode press i Exit hold by assigning the Control Knob to a variable function Model 1980A B Operation Control Knob Cont d GEE Program Codes Assign the Control Knob and set step resolution RC lt code gt lt step gt hoid channel 1 deflection factor code channel 2 deflection factor main sweep speed delayed sweep speed channel 1 position channel 2 position channel 1 position G N Oar WN Q channel 2 position to dual separation o horizontal position wA awh main trigger fevel N delayed trigger level delay delay wh ob ot US amp Ww delay eo trace intensity m character intensity 0 panel intensity o step coarse dh fine To assign the Control Knob to delay in the numerical entry mode first sendthe program code KY7 41 then send RC13 0 or RC13 1 to select step resolution Refer to the Key Detailed Operating Instruction for more information about the KY command The program codes for assigning the Control Knob to AT and AV are described in the Delta Time and Delta Volts Detailed Operating Instructions respectively Example Assign Control Knob to channel 1
98. eep mode DY lt value gt value i exponential d dd dd d ddd d e E d d 0 100 psec to 9 999 999 999 9 sec least significant nonzero digit must be gt 100 psec most significant digit must be lt 9sec Enter events delay value when delayed sweep is in digital delay mode DD lt value gt value integer d d 17 digits maximum O to 99 999 999 events 3 58 Model 1980A B Operation Example Indication Comments Related Sections Delay Cont d Enter delay time value of 20 usec using numeric entry mode FEM 1658 REMOTE DY20 0e 06 CR LF codes identifier e 2 ei ciali EOS delay value EET ES When the Control Knob is assigned to delay ff is lighted and the delay value is displayed in the LED readout Delay time values are displayed by the readout as exponential numbers digital delay values are displayed as integers It is a syntax error if a time or events delay value is entered via HP IB when the delayed sweep is not in the corresponding delay mode This error however is not trapped Always ensure the proper delay mode is selected before entering delay values Refer to the Sweep Mode Delayed Detailed Operating instruction for more information about selecting delayed sweep mode If a delay time value is entered via HP IB when numerical entry mode with coarse step resolution is selected the 1980A B only accepts two digits of the delay time value If a delay time value w
99. efore it provides a known starting point for selecting menu functions v a HP IB Soft Key Menus 3 73 Operation Model 1980A B Initialize Cont d Table 3 14 1980A B Initialized State instrument Function initialized State 3 74 Advisory Messages Bandwidth Limit Calibrator Level Character Generator Control Knob Assignment Delay Delta Time Delta Volts channel 1 channel 2 Horizontal Position Horizontal Mode HP IB Status Advisory intensity Characters intensity Lamps Intensity Trace Scope Mode Separation Dual Soft Key Menus Sweep Mode Delayed Sweep Mode Main Sweep Speed Delayed Sweep Speed Main Text Dispiay Trigger Delayed source slope level external 10 level internal coupling Trigger Main source stope level externa 10 ievel internal coupling Trigger View Vertical Coupling channel 1 channel 2 Vertical Deflection channel 1 channel 2 Vertical Mode Vertical Position channel 1 channel 2 no change off 1 V p p on trace intensity 0 0 nsec coarse off off off 0 00 div coarse main intensified no change 7096 coarse 9096 coarse 2596 coarse V vs T 3 00 div coarse off auto sweep auto 10 0 ysec div fine 100 usec div coarse off channel 1 positive 1 V coarse 1 00 div coarse AC channet 1 positive 1 V coarse 1 00 div coarse AC off AC AC 2 00 V div fine 2 00 V div fine channel
100. en pressed since power on 3 81 Operation Description Procedure GEE Comments Reiated Sections 3 82 Modei 1980A B Learn Mode The 1980A B has learn mode capability which uses the HP IB controller memory to store instrument configurations Learn mode provides a fast means of configuring the 1980A B from an HP IB controller and also a compact format in which instrument setups can be stored The learn string contains all of the information that is stored in the Save Recall registers In other words it includes all variable function parameter values and ail state or mode selections The learn string is transferred as binary data between the 1980A B and the HP IB system controller Program Codes Command the 1980A B to output a learn string TE Then address the 1980A B to talk The learn string comprises 80 8 bit bytes End of String is indicated by setting the EO bus control line true with the 80th byte To configure the 1980A B using learn mode send a previously acquired learn string as a Data message lt 80 byte string gt lt CR gt lt LF gt The learn string must be transferred using a technique that does not send the unlisten UNL or untalk UNT bus commands H the 1980A B is unaddressed during Data message transfers the transfer is aborted Remote Operation paragraph 3 21 Save Recall Modei 1980A B Operation Power on Sequence and Default Conditions Description When power is switched on
101. ence point by pressing whilethe Control Knob is assigned to that channel s vertical position variable function While the Contro Knob is assigned to channel 1 or 2 AV pressing fis turns off AV mode for that channel Select step resolution by pressing BE dE Program Codes Turn on AV mode for channel 1 or 2 and assign Control Knob DV channel lt state gt channel 1 channel 1 2 channel 2 state O AV off 1 AV onzeroed Control Knob assigned Select Control Knob step resolution RC channel step channel 5 channel 1 6 channel 2 stepi O coarse 1 fine 3 62 Model 1980A B Operation Example indication Comments Related Sections Delta Volts Cont d Turn on channei 1 AV d a UI E x opo 6 REMOTE DV1 1 lt CR gt lt LF gt codes identifier channel When AV is on for a channel the LED and CRT readouts display the AV value instead of deflection factor The LED readout displays l OOD Blwhen AV is zeroed If channel deflection factor is changed after AV mode is selected AV is turned off Control Knob Reading Values Via HP IB Scope Mode Vertical Mode Vertical Deflection Factor Vertical Position 3 63 Operation Description Indication Comments Related Sections 3 64 Model 1980A B Error Messages If the 1980A B detects an internal hardware error an error message is displayed in the LED readout The error message is primarily meant as a diagnostic
102. ent of each other as possible Nevertheless the first four checks should be performed in order before the other checks Any special initialization or requirements for a check are described at its beginning HP IB Controller HP 9825 98213A General and Extended i O0 ROM Or HP 9835 98332A 1 0 ROM Or HP 9845 with HP IB 1 O HP IB interface accros HP 98034A revised Connect the Measurement System to the bus controller via the HP IB Interface Address Recognition This check determines if the Measurement System recognizes when it is being addressed and when it is not This check assumes only that the instrument can properly handshake on the bus Before beginning this check set the Measurement System LINE switch to OFF then to ON Description HP 9825 HP 9835 45 HPL BASIC Set Remote Enable REN line false ici 7 LOCAL 7 Send the 1980A B listen address wrt 707 OUTPUT 707 The HP iB status advisory should read HP Ei i Unaddress 1980A B by sending a different listen OUTPUT 721 address The HP IB status adv sory should turn off Remote and Local messages and P This check determines if the Measurement System properly switches from local to remote control from remote to local control and whether the key sequence RN returns the instrument to local control This check assumes that the Measurement System is able to both handshake and recognize its own address Before beginning this check set the Measureme
103. ept as defined in the program code format description The maximum length of a Data message string is 127 characters including semicolons commas lt SP lt CR and lt LF gt Errors in Data message syntax are trapped and can be reported via The HP IB For details about detecting and reporting format errors refer to the HP IB Syntax Errors Detailed Operating Instruction 3 23 Operation Model 1980A B General Input Data Message Format program code gt lt program code gt j lt CR gt I lt LF gt Device dependent EOS message command Delimiter is required Optional characters to separate multiple not required commands within Data before EOS message Multiple device dependent commands are allowed up to maximum string length of 127 characters Program Order Considerations Measurement System functions may be programmed in practically any order from the HP IB However it is recommended that program code sequences should be in the same order used for front panel operation Generally this requires that functions be set up starting with the most basic parameter to be changed For example before entering channel 2 deflection factor turn on channel 2 If a plug in or internal option for the instrument imposes any other order considerations the manual for that option provides the necessary programming information Table 3 5 lists typical processing times for some sample Data messages To minimize the pro
104. er S1 press 6 SF E GER 1 Sac M T Change the instrument state press SoN Bus Recall S1 press Recall S2 press Refer to the Save Recall Detailed Operating Instruction for more information Model 1980A B Operation 3 20 PANEL FEATURES 80 82 Soft Keys E calls Ci which redefines the soft key functions with labels displayed on the CRT When a menu is displayed pressing mes returns the soft keys to their normal functions a assigns the Control Knob to trace intensity i pesi assigns the Control Knob to panei intensity ER assigns the Controi Knob to character generator intensity ae toggles character generator on and off has no function except as defined by menus has no function except as defined by menus calls the St menu The soft keys are then defined to store turns off the instrument state in the corresponding Save Recall register T calls the al gx SLI menu The soft keys are then defined to recall the turns off the instrument state stored in the corresponding Save Recall register 1 menu has no function except as defined by menus Figure 3 5 Display Panel Features Channel 1 and 2 deflection factor is displayed if the channel is on or is selected as a trigger source If AV mode is selected A value is displayed instead of deflection factor For 10 div meas urements 9096 and 1096 reference points are marked on the gra
105. ertical inputs selects trigger sources and autoranges trigger levels defiection factors and sweep speeds Execute autoscope press jAuro score ELECTIVE After autoscope the 1980A B displays input signals plotted vs main sweep Main sweep speed is selected to display 2 cycles of the waveform If only one signal is applied deflection factor is selected so the displayed signal is 3 divisions peak to peak For more information about the autoscope function refer to the Autoscope Detailed Operating Instruction 3 12 Keys and Indications Instead of conventional mechanical switches the 1980A B has membrane switch keys to control instrument operation Instrument setup is stored in nonvolatile memory so it is not lost when instrument power s cycled off and on The keys are easy to operate just press on the center of the key legend Active functions or operating modes are indicated by lighted keys For example press E to turn on vertical bandwidth limit The key lights to indicate bandwidth limit is on lis usedtoselectblue labled shift functions ishifts only the next key that is pressed if the next key has no blue shift function the normal function is LUPA For example to invert channel 2 first press f It lights to indicate that a blue function can be to restore noninverted selected Now press to select inverted display Invert is a toggling function so pressi put g display Press Baciagat M h
106. es are connected channel deflection factor is displayed as the total value at the probe tip Figure 3 8 Voltage Panel Features Operation i Model 1980A B Horizontal Mode enables and displays main timebase only EFESTO ss enables main and delayed timebases Displays delayed sweep as a marker on main sweep trace 2 enables main and delayed timebases Dispiays delayed sweep only enables main and delayed timebases Displays main and delayed sweeps in alternate or chop depending on vertical display mode selection Trigger View Ee toggles the main trigger view on or off toggles delayed trigger view on or off Horizontal Position assigns Control Knob to horizontal position Dual Separation 80 80 assigns Contro Knob to dual separation Sweep Mode ME select the mode of main sweep operation x seme and 2 select the mode of delayed sweep operation resets both main and delayed sweeps Sweep Speed main or dly dj assigns the Control Knob to sweep speed Delay assigns the Control Knob to delay normal entry mode If delayed sweep is in auto sweep or triggered sweep modes delay value is in units of time In digital delay mode delay is expressed as trigger events MESS assigns the Control Knob to numerical time entry mode if delayed sweep is in auto sweep or triggered sweep modes Trigger main or diy d assigns the Control Knob to trigger level s selec
107. essed The instrument s settings remain unchanged during remote to local transitions If the HP IB status advisory is enabled the remote indicator 5j turns off as the remote to local change is made 3 26 Local Lockout When program control is interrupted which can happen by returning the instrument to local via the front panel keystroke sequence data or settings could be changed This would leave the instrument in an unknown state To prevent this a local lockout is recommended Local lockout allows return to local only under program control Note Return to local can also be accomplished by turning the instrument off then on again with the LINE switch However this technique has several potential disadvantages it defeats the purpose of local lockout that is the system controller may lose control of the instrument Other HP IB conditions reset to default states at power on 3 27 Addressing The Measurement System interprets the byte on the eight bus data lines as an address or a bus command if the bus is in the command mode Attention control line ATNitrue In addressable mode the instrument may be addressed to listen or to talk 3 21 ation Model 1980A B addressed to listen the instrument remains configured to listen until it receives an Abort message IFC its own talk address MTA or a universal unlisten command UNL from the controller Once addressed to talk the instrument remains configured to t
108. etween positive and negative slope For more information about triggering refer to the Trigger Delayed Sweep Trigger Main Sweep and Trigger View Detailed Operating Instructions INITIALIZE 3 15 Using Delayed Sweep This procedure describes some basic features of delayed sweep operation Press to display delayed sweep as a marker B on the main sweep When the delayed sweep is in auto mode marker position is determined solely by the delay time value Press and change delay time with the Control Knob until the marker overlaps the falling edge of the first pulse Press ad to display the delayed sweep This provides an expanded view of the pulse edge Select dual horizontal mode press Dual displays both the main and delayed sweep traces The main sweep marker indicates the portion of the waveform displayed in delayed sweep Press BEE ch 2 and center the main sweep trace inthe upper half of the CRT using the Control Knob Press i sweeps for convenient viewing MT SRI rsl and use the Control Knob to change the separation between Press dly d and change the delayed sweep speed with the Control Knob Try using both coarse and fine Because the sweep rates of the two timebases are independent of each other delayed sweep can actually be slower than main sweep 3 9 Operation Model 1980A B GETTING ACQUAINTED EXERCISE ES DELAS i S S S Delayed sweep can sta
109. eue 3 HP IB Compatibility LICEI Ss VAN E ede oad HP IB Status Display e Aa ve a taa AS ctas Remote Moda il Daria aa alii eU ate j shh Sareea e ULP Ies Ven Remote CapabilitY o ooooo A LEE qa CD A EEE Asia ita Local to remote Mode Changes ME DERE NONE A A Local MOS e rs Z T O atra deae exu Oo ed OUR dd aec diem TURA al as Local Capability ilari at Be es Rela a MSN sona I ES us Remote to local Mode Changes dE SUIDA RR REY dE a veto Idee Diurno ERRE EDoal LOCKOUL A ORE ES reina ar ri ia NAM ROG ads ek ineat Addressing EIE RE dre vein deed eae o e Cn R E a VERA ELS delen Aa NOTET Listen only Mode ci RS pr iaia T Vis s Tatk oniy Mode is A EA T EEEE DE aner HP B Turn on Default Conditions c CRAVE eS ere aie ses RENO o m Diego ba an ER EUR Data Messages I E de rear ia MT EA va NAT irem 9 Lac Receiving the Data Message eee eee teat e NOR s RR MIT SE sp Model 1980B one ot n n9 raro tree ton est tan t v oe eee eevee ore ett t omn t t n sere eae sr ett t mt t n s t ert n m tm on one tesse eve KX ns 3 1 3 1 3 1 3 1 3 1 3 1 3 1 3 2 3 2 3 2 3 2 3 2 3 3 3 3 3 3 3 3 3 4 3 6 3 7 3 7 3 7 3 8 3 9 3 10 3 10 3 11 3 12 3 13 3 18 3 18 3 19 3 20 3 20 3 21 3 21 3 21 3 21 3 21 3 21 3 22 3 22 3 22 3 23 3 23 Model 19808 Input Data Message Format
110. ey was pressed etc The qualifier registers can be read without reading the Status Byte message if desired The instrument status registers are not accessible from ie front panel The Status Byte is read via the serial poil sequence described in figures 3 14 and 3 15 Program Codes To read the status qualifiers select the data to be output by the 1980A B OQ lt code gt code HP IB syntax error code last key code trigger flag state advisory or error code internal option code O Cd a WwW Nx A plug in option code Then address the instrument to talk and read the data 3 75 Operation E Exampie indication Comments Related Sections 3 76 Model 1980A B Instrument Status Cont d Command the 1980A B to output trigger flag state REMOTE 003 lt CR gt lt LF gt codes l identifier qualifier code if an enabled Service Request condition occurs the HP IB status advisory displays until the Status Byte message is cleared The status qualifier registers contain information pertaining only to the last occurrance of the corresponding condition Advisory Messages Error Messages HP IB Status Advisory HP IB Syntax Errors Key Service Request Condition Soft Key Menus Trigger Flag Model 1980A B Operation Description Procedure Exampie Comments Related Sections Intensity Characters and Lamps The brightness of the characters displayed on the CRT and of the panel la
111. g the corresponding key Related Delay Sections Deita Time Scope Mode Sweep Mode Delayed Sweep Mode Main Sweep Speed Delayed Sweep Speed Main Trigger Delayed Trigger Main 3 67 Operation Model 1980A B Horizontal Position Description ln V vs T mode the horizontal position of the displayed waveforms can be adjusted for viewing convenience When horizontal position is zero the sweeps begin at the leftmost vertical graticule line Horizontal Position Characteristics Hc IA a EN 6 00 div resol tlon ohne VR Eu eh rav da 0 02 div Procedure To change horizontal position press S andadiustwith Control Knob Resolution is the same in coarse and fine In coarse step size is a function of speed of rotation of the Control Knob QU Program Codes Enter horizontal position value HP lt value gt value decimal 1 lt SP gt d d d d 6 00 to 6 00 div value must be multiple of 0 02 div Example Change horizontal position setting to 2 44 REMOTE HP 2 44 lt CR gt lt LF gt codes l identifier value Indication When Control Knob is assigned to horizontal position in the LED readout is lighted andthe position value is displayed Related Control Knob Sections Reading Values Via HP B 3 68 Modei 1980A B l Operation HP IB Address Description The HP IB addressing mode and address can be displayed and changed from the front panel using soft key menus Procedure menu Press
112. gger signal VERTICAL AMPLIFIERS 2 BANDWIDTH 3 dB down from a 5 div reference signal O to 40 C DC Coupled dc to 100 MHz in 500 and 1 ML input modes AC Coupled 10 Hz to 2100 MHz BANDWIDTH LIMIT limits upper bandwidth to approx 20 MHz INPUT COUPLING AC DC 500 DC Ground Ground position disconnects input connector and grounds amplifier input INPUT RC AC or DC 1 MO 2 shunted by approx 16 pF 50 Ohm DC 500 13 MAXIMUM INPUT VOLTAGE 50 Ohm 5V rms 1 Megohm ac or dc coupled 250V dc peak ac at x1 kHz DEFLECTION FACTOR Range 2 mV div to 10 V div Resolution 3 digits Adjustment coarse stepping is in a 100 150 200 300 900 sequence fine stepping is a change of 1 in the least significant digit Accuracy 13 VERTICAL POSITION Range baseline can be adjusted 15 major div from center graticule line possible 10 div off screen Resolution O 02 major division Adjustment coarse or fine slew rates Accuracy 296 of reading 0 3 major div AV CHANNEL 1 OR 2 Range 15 times the deflection factor selected for that channel Resolution 0 02 times the deflection factor for that channel Adjustment coarse or fine slew rates Accuracy 14 for a A lt 10 major divisions CHANNEL 1 2 Amplifier bandwidth and deflection factors are unchanged Differential Channel 1 2 or Channel 2 1 CMR is at least 20 dB from de to 20 MHz with common mode signal amplitu
113. hannel on with calibrator connected Write text on line 1 of the CRT text fieid Assign Control Knob to channel 1 deflection factor fine resolution Turn on channel 2 only Enter channel 1 deflection factor of 2 mV div If polarity change is made add 54 msec Select DC coupling for channel 1 Select intensified horizontal mode time given is for change from main mode Select delayed horizontal mode time given is for change from intensified mode Enter main sweep speed of 50 usec div Enter delay time of 200 msec Enter delayed trigger level of 2 div internal source selected Enter channel 2 coupling and sensitivity Notethe m time improvement when several program codes are sent in a single Data message Select horizontai mode and main sweep speed mode trigger source slope level and coupling Execution time is measured from receipt of EOS message lt LF gt Maximum data input rate is 127 usec character 3 25 Operation Mode 1980A B Bus addressing commands EOS message Execute autoscope E lt UNL gt lt OTA gt lt MLA gt IN SKO 2 3 lt CR gt lt LF gt Execute delay and balance Execute initialize self cal routines lt UNL gt lt OTA gt lt MLA gt VM 1 VS 1 2 50e 03 VC 1 3 lt CR gt lt LR gt Select vertical Set channel 1 mode channel 1 coupling AC only Set channel 1 deflection factor to non inverted 2 5 mV division The bus addressing comma
114. he SRO line true when one of the service request conditions occur if it has been enabled to send the ROS message for that condition Responds to a Serial Poll Enabie SPE bus command by sending an eight bit byte when it is addressed to talk Bit 7 ROS bit is true if the 1980A B had set the SRO bus control line true The byte is cleared after it is read by the HP IB controller Does not respond to a parallel poil Is unaddressed to listen or talk Operation Related interface Commands Functions and Control The 1980A B Oscilioscope Measurement System s complete bus capability as defined in IEEE Std 488 1978 is SH1 AH1 T5 TEO L3 LEO SRI RL1 PPO DCO DT1 CO E2 3 23 HP IB Status Display The status of the Measurement System on the HP IB is annunciated on the CRT by a special HP IB status advisory For example figure 3 8 shows the HP IB status advisory displayed when the instrument is in remote mode and addressed to listen The symbols displayed in the advisory and their indications are listed in table 3 4 3 19 Operation Model 1980A B Table 3 4 Symbols Used in HP IB Status Advisory Advisory HP 1B Status Indication Symbol Switched to remote mode Addressed to listen Addressed to talk issued the Require Service message The HP IB status advisory is normally enabled It is enabled by default at power on and when the i A HETE menu is accessed The status advisory can be disabled by the remote
115. he internal crystal reference accuracy FRONT PANEL CAL 1980A B Channel 1 and 2 position dual separation main and delayed trigger level and delay time are calibrated to specified accuracy using internally generated calibration sig nals Channel 1 and 2 deflection factors and main and delayed sweep speeds are calibrated to speci fied accuracies with externally supplied calibra tion signals Deflection factors and sweep speeds are also supplied with internal calibration signals as a performance verification with approx 6 accuracy SIGNAL OUTPUTS Calibrator Outputs rear panel BNC and front panei post source impedance approx 1500 probe calibra tion 1 V p p 1 approx 1 86 kHz square wave rise time lt 5 us programmable cal signals 20 mV p p 276 100 mV p p 1 200 mV p p 1 1 V p p 196 and 10 V p p 1 15 Volt Reference source impedance approx 1 kO level 15 V 130 mV Main Gate source impedance ECL gate output signal high ECL logic level following main gate Delayed Gate source impedance ECL gate output signal high ECL logic level following delayed gate POWER 100 120 220 240 Vac 5t0 10 48 to 440 Hz 300 VA max with expansion module and plug in ROMS standard 200 VA max OPERATING ENVIRONMENT Temperature O to 55 C Humidity to 95 relative at 40 C Altitude to 4600 m 15 000 ft Vibration vibrated in three planes for 15 min each with 0 38 mm 0 015 in excursion 10 to
116. he shipping materials for the carrier s inspection 2 3 PREPARATION FOR USE 2 4 Power Requirements The Measurement System requires a power source of 100 120 220 or 240 Vac 5 10 48 440 Hz single phase Power consumption is 200 VA maximum with an expansion module and plug in ROMs installed power consumption is 300 VA maximum WARNING This is a Safety Class product provided with a protective earth terminal An uninterruptible safety earth ground must be provided from the main power source to the product input wiring terminals power cord or supplied power cord set Whenever it is likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation If this instrument is to be energized via an autotransformer for voltage reduction make sure the comonterminalis connected to the earthed pole of the power source 2 1 Installation Model 1980A B 2 5 Line Voltage and Fuse Selection WARNING For protection against fire hazard the line fuse should only be replaced with 250 V fast blow fuses with the correct current rating CAUTION BEFORE CONNECTING THIS INSTRUMENT to line Mains voltage be sure the line voltage switches are set correctly and that the proper fuse is installed If the line fuse burns out do not replace it until the cause for failure has been determined and repaired by a qualified service person only Replacing this fuse in a
117. ical or normal entry mode The last selected delay time entry mode determines the AT entry mode If sweep speeds sweep modes trigger levels or main trigger conditions are changed or the corresponding keys pressed AT mode is turned off When AT is first turned on from the front panel or via the HP IB AT is expressed in terms of time Control Knob Delay Delay Time Self cal paragraph 3 49 Horizontal Mode Reading Values Via HP IB Sweep Mode Delayed Sweep Speed Delayed Sweep Speed Main Trigger Fiag 3 61 Operation Model 1980A B Delta Volts Description AV provides a convenient means of measuring voltage using the Control Knob AV is a special operating mode of the vertical position variable function in which channel deflection factor is multiplied by change in vertical position A zero vertical reference point can be set anywhere within the vertical position range Then as vertical position is incremented or decremented the 1980A B displays a direct reading of the voltage interval between the zero reference and the present trace position AV measurements can be made with both channel 1 and 2 in either V vs T or 1 vs 2 scope modes Delta Volts Characteristics Channel 1 or 2 fango coal Tec rk aaa 15 times the channel deflection factor q svasata rione e 0 02 times channel deflection factor er Lycee tits if alia sio 4 for a position change x 10 div Procedure Select AV mode for a given channel andsetthe zero refer
118. icator E is blanked when the Clear Lockout Set Local message is received 3 39 Receiving the Pass Control Message The instrument does not implement the controller subset therefore it does not respond to the Pass Control message 3 40 Sending the Require Service Message The Measurement System sends the Require Service message by setting the SRO bus control line and bit 7 of the status byte true when a previously programmed condition occurs The instrument can send the Require Service message in either local or remote mode The Require Service message is cleared when a serial pol is executed by the system controller During serial poll the SRO control line is reset immediately before the instrument places the Status Byte message on the bus Figure 3 13 3 28 Model 1980A B Operation RI includes the conditions that can be selected to cause the Require Service message If no conditions are selected the Require Service message is disabled The Measurement System indicates having sent the Require Service message by displaying in the HP 1B status advisory This indicator is turned off during the serial poll when the SRO control line is reset if the Measurement System is set to either listen only or talk only mode it can not send the Require Service message For complete information about programming the condition that causes the Require Service message refer to the Service Request Condition Detailed Operating Instruction
119. iew signal Sweep Mode Delayed Sweep Mode Main Trigger Delayed Sweep Trigger View Vertical Deflection Factor Vertical Coupling Model 1980A B Operation Trigger Flag Description The trigger flag is a trigger circuit output that can be monitored via the HP IB It is used in remote operation to detect trigger events and to make voltage and timing measurements Trigger flag detects whether a valid trigger event occurred Either the main or delayed trigger can be selected to set the flag There are two modes of trigger flag operation latched and dynamic In latched mode the selected trigger signal must make a transition through the trigger threshold level with the selected siope during delayed sweep to set the flag to 1 Figure 3 23 contains examples of trigger flag state when latched mode is selected In dynamic mode the flag follows the trigger signal With positive trigger slope selected the flag is 1 while the trigger signal is greater than the trigger level With negative slope selected the flag is 1 while the trigger signal is less than the trigger level Figure 3 24 contains an example of trigger flag state in dynamic mode TRIGGER LEVEL POSITIVE SLOPE 1 FLAG 1 2 FLAG O 3 FLAG 0 4 FLAG 0 b FLAG 0 Figure 3 23 Latched Mode Trigger Flag State Examples FLAG STATE O 1 O 1 O TRIGGER LEVEL POSITIVE SLOPE Figure 3 24 Dynamic Mode Trigger Flag State Example 3 117 Operation
120. in and delayed sweeps Set trigger level to 0 5 divisions Determine period of trigger source and set main sweep speed for approximately 2 cycles of display Set delayed sweep speed to 0 1 of main value Display input waveforms and return control to front panel or HP IB operator With selective autoscope the operator can define which channels are to be autoranged In addition selective autoscope preserves coupling trigger source and trigger level selections Table 3 8 describes which functions are preset and which are preserved by selective autoscope Procedure To execute autoscope press To execute selective autoscope press Program Codes Execute autoscope AS Execute selective autoscope SA 3 46 Model 1980A B l Operation Example Indication Comments Related Sections Autoscope Cont d Execute Autoscope REMOTE AS lt CR gt lt LE gt codes identifier ice sei i ee ere E EOS Asthe 1980A B is autoranging deflection factor and sweep speed for each input channel the signal waveform is visible on the CRT At completion of autoscope all input signals greater than 10mV are displayed Selective autoscope defaults to fuli autoscope execution if any of the following conditions are detected 1980A B not in V vs T mode No vertical channels on 1 2 vertical mode selected H no input signals are found when autoscope is executed these additional presets are made Trigger sour
121. ing is described in paragraph 3 32andinthe Learn Mode Detailed Operating Instruction The HP IB Codes and Format Summary paragraph 3 55 provides a list of all program codes for the 1980A B This summary includes a brief description of each code specific format requirements and a cross reference to further information in the Detailed Operating Instructions 3 30 Receiving the Data Message The Measurement System responds to Data messages when in remote mode REN control line true andis addressedto listen or when it is in listen only mode input Data Message Format Input Data messages contain a string of device dependent commands program codes and an End of String EOS message The program codes within a Data message are executed after the EOS message is received The following format rules must be observed in ali input Data messages A linefeed lt LF gt is used as the End of String EOS message Each Data message must be terminated by a lt LF gt Except during Learn String transfers the carriage return character lt CR gt is not required before LF gt Preceding lt LF gt CR is treated as no operation and may be repeated as many times as permitted by the maximum string length limitation When several program codes are sent in a Data message a semicolon must be used to delimit each program code except the last one in the string Spaces lt SP gt are not allowed within input Data messages exc
122. ions and plug in Expansion Modules 1 2 Model 1980A B Generat Information In addition the 1980A B has these special features Ail functions are programmable via HP IB HP s implementation of IEEE Std 488 for automatic or semi automatic measurement applications Autoscope function presets the 1980A B then autoranges trigger level deflection factor and sweep speed It provides a one keystroke setup for most input signals Save Recall registers can be used to save as many as eight complete instrument states for recail in repetitive measurement procedures Calibration can be performed on site without removing covers and requires little or no test equipment Internal reference signals are provided and complete step by step instructions are displayed on the CRT 1 6 OPTIONS 1 7 Electrical Options Option 080 Supplies two 10080A 10 1 1 M 3 3 ft probes instead of two 100814 probes Option 082 Supplies two 10082A 10 1 3 M 10 ft probes instead of two 10081A probes Option 083 Supplies two 10083A 1 1 1 M 3 3 ft probes instead of two 10081A probes Option 084 Supplies two 10084A 1 1 2 M 6 5 ft probes instead of two 100814 probes Option 090 Deletes probes Option 150 Supplies HP Model 1950A Two Channel Vertical Plug in installed in the 1980A B Option 810 Supplies HP Model 19810A Key Sequence ROM installed in the 1980A B 1 8 Mechanical Options The following options are available for rack mounting
123. is much slower than delayed may cause 19 viewing problems LUME MOLDOFE E SLEA DL TI SH delayed sweep speed is much slower than main may cause 20 viewing problems IHTEH TI TE sified marker is beyond the main sweep window OFF SCR the delay time is greater than ten times the main sweep speed The inten 21 PH AT MODE OHLY only a AT value can be expressed in terms of frequency Select AT mode 22 HIE T TEST the Confidence Test RAM Test or ROM Checksum found no errors 24 FRELET T the Confidence Test RAM Test or ROM Checksum found an error The instrument should 25 be checked by qualified service personnel 3 45 Operation Model 1980A B Autoscope Description Autoscope finds the amplitude and period of signal inputs and displays them on the CRT For many waveforms it provides a one keystroke setup of the 1980A B Autoscope is optimized for repetitive input waveforms with the following characteristics frequency sbirciare 50 Hz to 100 MHz amplitude sui 20 mV to maximum input rating Autoscope executes the following general procedure Preset the conditions listed in table 3 8 Test signal amplitude at each vertical input If a signal is found adjust channel delection factor for approximately 3 divisions of display If no signals are found display advisory and end routine Turn off channels with no signal input Select signal from lowest numbered channel as trigger source for ma
124. ith more than two digits is entered the value is truncated to two digits To avoid this condition ensure the delay time function is either in normal entry mode or numerical entry mode fine step resolution In triggered or digital delay delayed sweep modes the setup time of the delayed trigger circuit must be taken into consideration if delayed sweep is to be triggered on the same pulse edge as main Delayed trigger events cannot be detected until approximately 70 nsec after main trigger Control Knob Delay Time Self cal paragraph 3 49 Delta Time Sweep Mode Delayed Sweep Mode Main Trigger Fiag 3 59 Operation Model 1980A B Delta Time Description AT provides a convenient means for making time interval or frequency measurements from the front panel It is an extension of the delay time function AT allows a zero time reference to be set anywhere within the delay time range Then as delay time is incremented or decremented the 1980A B displays a direct readout of the time interval between the zero reference and the present delay value Delta Time Characteristics anda silla O sec Tzero to 9 999 999 9 sec Tzero resolution front panel ia 5 digits 100 psec minimum refer to table 3 9 HPHB uus dex 6 T 9 100 psec accuracy iaa a ER delta time accuracy is the same as delay time it depends upon delayed sweep speed value and delay time as described in table 3 10 delay jitter zie 0 002 of delay time Procedure
125. l _ o _u iauroe rici uonglisdo SIMPLIFIED OPERATION Obtaining a Basic Display Model 1980B Use autoscope to dd set up the 1980A Bfor a basic triggered display Connect the signal to be viewed to channel 1 or 2 and press indications Active functions or operating modes are indicated by the lighted keys and the CRT readout Primary variable function values are displayed in the CRT readout for convenient reference Advisory messages are displayed on the CRT as an operator s aid They are displayed momentarily when an illegal key entry is made or when other conditions occur that may require additional information Changing Values Variable function values can be changed with the Control Knob Assign the Control Knob to a variable function by pressing the corresponding variable function key EE ich 1 or 2 ch 1 or 2 main or dly d main or diy d trace intensity panel intensity character intensity deflection factor vertical position sweep speed trigger level horizontal position dual separation delay delay numerical entry mode Then increment or decrement the function value by rotating the Control Knob The Control Knob is a stepping control Coarse or fine step resolution can be selected with Soft Key Menus The function of the soft keys is changed when a menu is called to the CRT Menus redefine the soft keys with displayed labels such as soft key number The menus can be tur
126. l control The Local message GTL bus command addresses the instrument to listen and then switches it from remote to local mode If the HP IB status advisory is enabled the remote indicator z will turn off when the Local message is received No instrument settings are changed by the remote to local transition Aithough the Local message returns front panel control it does not clear local lockout Unless the instrument receives the Clear Lockout Set Local message if local lockout is in effect it will return to locat lockout mode the next time it goes to remote 3 37 Receiving the Local Lockout Message The Locali Lockout message LLO bus command disables the Measurement System s front panel return to local keystroke sequence Local Lockout is accepted when the instrument is in either remote or local mode Afterwards whenever the instrument is in remote mode lockout is in effect While the instrument is in local lockout the remote to local transition can only be made from the system controller by sending the Clear Lockout Set Local message or the Local message 3 38 Receiving the Clear Lockout Set Local Message The Clear Lockout Set Local message REN control line false returns the Measurement System from remote to local mode and clears the local lockout condition No instrument settings are changed by this message lt is accepted while the instrument is in either remote or local mode If the instrument is in remote mode the remote ind
127. lating to remote operation of the Measurement System refer toRemote Operation Hewlett Packard Interface Bus in Section Ill of this manual 1 11 HP IB Address The HP IB address 7 is preset at the factory before the instrument is shipped This address may be displayed or changed from the front panel when the HP 15 MICE MODE menu is selected This procedure is described in Section If The HPAB Address Detailed Operating instruction Section lil provides a more complete description of addressing considerations 1 12 ACCESSORIES SUPPLIED Accessories supplied with the Measurement System are in figure 1 1 Included with the instrument are One blue light filter one 2 3 M 7 5 ft power cordset one Expansion Module Panel Cover and one complete Operating and Service Manual A second copy of the Operating and Programming Manual sections I Ili is also included The power cable and line fuse are selected at the factory accord ng to the voltage available in the country of destination For the part numbers of the available power cables refer to paragraph 2 6 AC Power Cable in Section Il 1 13 EQUIPMENT AVAILABLE The following accessories are available for servicing the Measurement System 64 Pin Hybrid Extender Aids troubleshooting circuits containing 64 pin hybrids Order HP part number 5081 7663 Plug in Extender Required to service plug in Expansion Modules Order HP part number 01980 63901 1 14 RECOMMENDED
128. lected i main sweep speeds less than 1 msec div Control Knob Delay Intensity Trace Reading Values Via HP IB Sweep Mode Delayed Sweep Speed Main Vertical Mode 3 103 Operation Model 1980A B Text Display Description The 1980A B character generator can be programmed via the HP IB to write special messages on the CRT The available display area is shown in figure 3 20 PA Em ate te 80 341 Figure 3 20 Text Field in the 1980A B CRT Display Procedure Text cannot be entered from the front panel however the text field can be toggled on or off with Program Codes Erase text field TX Erase text line TX lt line gt line integer dd 1 14 16 3 104 Model 1980A B Operation Text Display Cont d Write text line TX lt line gt string line integer dd 1 14 16 String 1 to 28 characters 1980A B character set table 3 22 Write text with display attributes CH lt line gt lt string gt line integer dd 1 14 16 string 7 to 28 bytes counting characters and attributes String must contain 4 attributes Attributes must be separated by at least one character First byte must be an attribute Table 3 21 Special Text Attributes normal inverse blinking underline blinking and inverse inverse and underline blinking and underline inverse blinking amp underline 3 105 Operation Model 1980A B Text Display Con
129. led checksum ROM 8 Failed checksum ROM 10 Failed checksum ROM 12 Failed checksum ROM 14 Failed checksum ROM 16 Failed checksum ROM 18 Failed checksum ROM 20 Failed checksum ROM 22 Failed checksum ROM 24 Failed checksum ROM 26 Failed checksum ROM 28 Failed checksum ROM 30 Failed checksum Confidence test vertical channel error Confidence test horizontal range error Confidence test 10 V signal not found Confidence test 1 V signal not found Confidence test O 1 V signal not found Confidence test 0 02 V signal not found 1980A B cal factor checksum error Channel 1 failed autobalance Channel 2 failed autobalance Scratch RAM U16 failed Nonvolatile RAM U42 43 failed Character RAM U32 33 failed Feature RAM U34 36 failed Save Recall RAM U35 37 failed Horizontal Word output failed 3 65 Operation Description Procedure EP 3 66 Model 1980A B Horizontal Mode in V vs T scope mode four horizontal modes are available The modes are Main main intensified delayed and dual Main displays vertical inputs with respect to the main timebase Main intensified displays the vertical inputs with respect to the main timebase and intensifies the portion of the trace that occurs during delayed sweep Delayed displays the vertical inputs with respect to the delayed timebase Dual displays both the main intensified and the delayed sweep traces using the selected vertical mode alternate or chop In main mode only the
130. ll of the bus data handshake and contro lines except DIO8 are set to both their true and false states These procedures do not check whether or not all Measurement System program codes are being properly interpreted and executed by the instrument however if front panel operation is correct the program codes in all likelyhood are correctly implemented l The validity of these checks is based upon the following assumptions The instrument performs correctly when operated in local mode This can be verified with the Confidence Test and the Memory Check ROM Checksum and RAM Test procedures in paragraphs 3 45 and 3 46 respectively The bus controller properly executes HP IB operations as defined by IEEE Std 488 The bus controller s HP IB interface properly executes the HP IB operations 3 33 Operation Equipment Setup Procedure 3 34 Model 1980A B If the Measurement System appears to fail any of these HP IB checks the validity of the above assumptions should be confirmed before attempting to service the instrument The controlier s HP IB interface select code is assumed to be 7 The Measurement System is assumed to be in the addressable mode with address 7 T7 L7 selected This select code address combination that is 707 is not necessary for these checks to be valid However program lines in this procedure would have to be modified for any other combination These checks are intended to be as independ
131. mps including the LED readout can be adjusted from the front panel or via the HP IB The intensities of both the characters and lamps are expressed as of full intensity D CAR ANTES To change the brightness of the character display press and adjust with the Control Knob INTEN To change the brightness of the panel lamps and the LED readout press f EE and adjust intensity with the Control Knob Program Codes Enter character and lamp intensity values FP char lamp char integer did lamp integer did Set the character intensity to 80 and the lamp intensity to 85 REMOTE FP80 85 lt CR gt lt LF gt codes identifier I Ere EOS char intensity lamp intensity If character generator is on and character intensity is set to value less than 35 when GIFT OH the character intensity is preset to level 35 1 is called If the CRT readout is off the character intensity level can not be changed from the front panel Character Generator Control Knob HP IB Status Advisory 3 77 Operation Model 1980A B intensity Trace Description The intensity level of displayed waveforms can be adjusted over a wide range with the trace intensity variable function This is necessary because perceived trace intensity brightness depends upon ambient lighting beam writing rate and beam repetition rate As an operating convenience two values of trace intensity can be entered
132. n and Instrument Status Detailed Operating Instructions explain how to detect errors and read their codes Table 3 13 HP IB Syntax Errors Syntax Error Description Parameter out of range Command not recognized Missing terminator Unexpected character Input buffer overflow Data output not specified HP 1B Code Indication A syntax error causes Hite gi EY NTR advisory to be displayed on the CRT if advisories are enabled Comments if the 1980A B is addressed to talk before the output data is ds it outputs ASCII character E to a fe advisory and does not cause the Require Service message to be sent However if the status qualifier for HP IB syntax is read the 1980A B outputs error code 6 Related Advisory Messages Sections Instrument Status Reading Values Via HP IB Remote Operation paragraph 3 21 Service Request Condition 3 72 Modei 19804 B Operation Description Procedure CEE Exampie indication Comments Related Sections initialize The 1980A B can be initialized to a defined state using the soft keys or via the HP IB Table 3 14 contains a complete description of the initialized state To initialize the instrument press a f FR Program Codes Execute initialize IN Initialize the 1980A B REMOTE IN CR LF codes identifier The instrument changes to the setup described in table 3 14 Initializing via the HP IB turns off soft key menus Ther
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134. n provides a description of these modes and general advice on their use Vvs Tis the most commonly used scope mode Channel 1 or 2 signal inputs Y axis are plotted versus timebase signals X axis in V vs T vertical and horizontal modes can be selected to enable convenient voltage and timing measurements 1 vs 2 selects an X Y operating mode Channel 1 signals are plotted versus channel 2 signals X axis This mode turns on channel 1 and 2 and it enables their controls The timebases are disabled X Y Z is a display operating mode using the rear panel X Y and Z blanking signals It is designed to accept the output of an HP model 16074A for logic state analysis This mode disables channels 1 and2 and the timebases Scope Mode Charactersitics V vs T Mode Y axis bandwidth eere dc to 100 MHz limit off deflection factor 2 mV div to 10 V div X axis timebase range eee 5 nsec div to 1 sec div 1 vs 2 Mode Y axis channel 1 bandwidth uis derer EO ERA dc to 100 MHz limit off deflection factor tini 2 mV div to 10 V div X axis channel 2 bandwidth eii de to 4 MHZ deflection factor 2 mV div to 10 V div Phase difference ees lt 3 dc to 100 kHz X Y Z Mode Y axis bandwidth 2 vows wav ta ae itm eo dc to 50 MHz deflection factor sr siriaca 0 4 V div 120 maximum Input 2 1299 sn noes 10 Vrms X axis bandwidth uoce tor EE NAE R EAS dc to 5bMHz deflection factor o vos
135. nd Remote message to 1980A B rem 707 REMOTE 707 Conduct a serial poll and display Status Byte value rds 707 STATUS 707 A DISP A HP IB status advisory should read RI Controller display should read 130 00 HP 9825 or 130 HP 9835 45 3 48 OPERATOR S CALIBRATION AND ADJUSTMENT 3 49 Delay Time Self cal Description To maintain the specified delay time performance execute the following delay self calibration procedure approximately once each hour Procedure The delay time self cai can be executed with the key sequence 3 38 Modei 1980A B Operation Indication Response It can also be executed via the HP IB by sending the Data message IN SK0 2 1 lt CR gt lt LF gt As the delay self cal is executing the LED readout displays a number which represents the relative delay drift As the drift is nulled this displayed number approaches zero When the self cal routine is finished the Measurement System is restored to the settings it had before the self cal was initiated If the drift cannot be corrected by the self cal routine the instrument executes the self cal repetitively until a key is pressed or the LINE switch is cycled OFF and ON To express the delay drift in terms of percentage error divide the value displayed in the LED readout by 1999 87 For example if the value 30 is displayed the drift is 30 1999 87 0 015 If the self calibration routine cannot correct the drift entirely internal adjus
136. nds perform the following functions UNL Unlisten unaddresses all current listeners OTA Other Talk Address is the talk address of some instrument other than the 1980A B In these examples OTA would be the talk address of the controller MLA My Listen Address is the listen address of the 1980A B Figure 3 12 1980A B Input Data Message Examples 3 31 Sending the Data Message The instrument can send Data messages in local or remote mode when is addressed to talk or in the talk oniy mode Note Before the instrument is addressed to talk the desired output data must be specified with the appropriate input Data message Otherwise the Measurement System outputs the ASCII character E by default to complete the bus transaction Output Data Message Format Output Data messages include the settings of individual functions instrument status information or binary Learn String data Excluding the Learn String there are three output data types Integer decimal and exponential All output Data messages contain a leading space lt SP gt followed by the function value or status data lt CR gt and LF gt are sent as the EOS message for all output data except the Learn String The Learn String uses the EO bus control line to signal end of string 3 26 Model 1980A B Operation TT CE For more information about output Data messages refer to the Reading Values Via HP IB Instrument Status and Learn OA Mode De
137. ne true rem 7 REMOTE 7 Address the 1980A B to listen wrt 707 OUTPUT 707 gag Press 43 The HP IB status advisory should read Model 1980A B Operation Abort Message This check determines if the Measurement System becomes unaddressed when it receives the Abort message This check assumes that the instrument is able to handshake recognize its own address and make the remote local transitions Before beginning this check set the Measurement System LINE switch to OFF then to ON Description HP 9825 HP 9835 45 HPL BASIC Send the Remote message to 1980A B REMOTE 707 HP IB status advisory should read H TE EL Send the Abort message unaddressing 1980A B ABORTIO 7 If using a HP 9825 check that the HP IB status advisory reads P i9 E If using a HP 9835 or 9845 check that the HP IB status advisory is turned off The 9835 and 9845 send the Local message and the Abort message with the ABORTIO command Send Local message HP 9825 only lci 707 The Local message was sent with ABORTIO statement Address 1980A B to talk red 707 ENTER 707 Send Abort message unaddressing 1980A B cli7 ABORTIO 7 Check that the HP IB status advisory s off Require Service Message This check determines if the Measurement System can issue the Require Service message set the SRO bus line true This check assumes that the Measurement System is able to handshake recognize its own address make remote local t
138. ned on and off by pressing E FEATURE ROMS soft key function Model 1980A B Table 3 2 Detailed Operating Instructions Index artica Deflection Factor UM rtical Mode ee Vertical Position Operation 3 5 Operation Mode 1980A B GETTING ACQUAINTED EXERCISE 3 10 GETTING ACQUAINTED EXERCISE This exercise is designed to acquaint you with front panel operation of the Measurement System It provides a demonstration of general operating features and many of the special functions In addition some basic measurement techniques are described The exercise should take about 20 minutes to perform The only equipment required is a 1980A B CAUTION Before turning the instrument on the first time follow these instructions and a probe On the rear panel 1 Check line voltage switches for correct voltage selection 2 Check fuse for correct current rating Current ratings are printed on the line module 3 Connect power cable Set the front panel LINE switch to ON Set up the 1980A B by connecting the calibrator signal to the channel 2 input figure 3 2 80 348 Figure 3 2 Getting Acquainted Exercise Setup 3 6 Modei 1980A B Operation GETTING ACQUAINTED EXERCISE INITIALIZE Set LINE switch to OFF then to ON 3 11 Using Autoscope Autoscope is a convenient means of obtaining a basic display of an unknown signal In executing autoscope the 1980A B scans the v
139. nel 1 or 2 vertical position VP channel gt lt value gt channel 1 channel 1 2 channel 2 value decimal Hi SP 1 did d d 15 00 to 15 00 divisions value must be a multiple of 0 02 div Example Change channe 1 position to 43 5 divisions REMOTE VP1 3 5 lt CR gt lt LF gt codes identifier 3J EOS channel position value 3 129 Operation indication Comments Related Sections 3 130 Model 1980A B Vertical Position Cont d When the Control Knob is assigned to vertical position Eis lighted and the LED readout displays the parameter value The vertical position of a channel cannot be changed if the channel is off or only used as a trigger source If an odd integer to the nearest hundredth is entered via the HP IB it will be rounded to the n arest even value positive values are rounded down negative values are rounded up A probe key closure at channel 1 or 2 causes a momentary shift in the vertical position of that channel strace for trace identification Deita Voits Vertical Mode Model 1980A B E Operation 3 55 HP IB CODES AND FORMAT SUMMARY HP IB Capability As described in IEEE Std 488 and ANSI Std MC1 1 the instrument s complete capability is SH1 AH1 T5 TEO L3 LEO SR1 RL1 PPO DCO DTT CO E2 HP IB Status Advisory The following instrument states are indicated on the CRT in the HP IB status advisory E Switched to remote mode Addressed to
140. ns and receive Data messages Before Td this check set the Measurement System LINE switch to OFF then to ON and press gt EB reese 3 35 Operation 3 36 Model 1980A B Description HP 9835 45 BASIC Send Remote message to 1980A B rem 707 REMOTE 707 Send a Data message to 1980A B which instructs it wrt 707 OF2 OUTPUT 707 OF2 to output the value of channel 2 deflection factor Address 1980A B to talk and store its output data in ENTER 707 A variable A Display value of A The HP IB status advisory should read Ea The controller s display should read 2 00 9825 or 2 9835 45 Local Lockout and Clear Lockout Set Local Messages This check determines if the Measurement System properly receives the Local Lockout message and the Clear Lockout Set Local message This check assumes that the Measurement System is able to handshake recognize its own address and properly make the remote local transitions Before beginning this check set the Measurement System LINE switch to OFF then to ON Description HP 9825 HP 9835 45 HPL BASIC Send Remote message to 1980A B rem 707 REMOTE 707 Send Local Lockout message llo 7 LOCAL LOCKOUT 7 The HP IB status advisory should read H iE Ri Press Advisory SCOPE should be displayed and the status advisory should remain unchanged Send the Clear Lockout Set Local message LOCAL 7 HP IB status advisory should read HP i5 Set REN li
141. nt System LINE switch to OFF then to ON Model 1980A B Operation En Description HP 9825 HP 9835 45 i HPL BASIC Send Remote message by setting the REN line true rem 707 REMOTE 707 and addressing 1980A B to listen The HP IB status advisory should read ERE RE Send Local message to 1980A B ici 707 LOCAL 707 The HP 18 status advisory should read HF Send Remote message to 1980A B REMOTE 707 XN Press The status advisory should change to read H BE Receiving the Data Message This check determines if the Measurement System properly receives Data messages This check assumes the instrument is able to handshake recognize its own address and properly make the remote local transition Before beginning this check set the Measurement System LINE switch to OFF then to ON Description HP 9825 HP 9835 45 HPL BASIC Set REN line true rem 7 REMOTE 7 Address 1980A B to listen and send the Data wrt 707 AS OUTPUT 707 AS message execute autoscope Check that the instrument executes an autoscope and that the HP IB status advisory reads HF Tin Sending the Data Message This check determines if the Measurement System properly sends Data messages It also verifies the the 7 least significant HP IB data lines can be sent and received in both their true and false states This check assumes the instrument is able to handshake recognize its own address make remote locai transitio
142. o ale sway pesojoua ey Jeu eolpu siexoe1q eJenbg vy P OLL 6p i 64 Sy H el ex BuJuJeJuoo zd jueujejeis Aue ul lt g gt Aq peoejdeJ eq UBI lt y gt Jey SBIBIIPUI go v ejduiexe 104 se peutjep SI mM v Sv 3 SI yy a VI ZON l pueuiuioo r 9 L tov Dov ov g ZL dnoip dnog amp 8l dH ue Jo iae wie led epoo weiBosd e azijoquiAs 01 pesn aJe 124 Spi0M oAnduosoep asojoue sieyxoeuq w nbuy lt gt LE v li sseippy i puguiuoo i OF LO yo D OL WEI j passeippy jeustgep uonelado gl 4H 910ui84 jo SUOIIdOSep Ul jenuev siyl ur pesn sue SUCITUSAUOD Buimojjo au L 8x0H Aug pounoeg amp 8i dH N dH SUOIS19AU0 BPO pasy A uQuJU402 O QEL SNOILINIJ3Gd CONV SNOLLNJANOO NOILVLON 9S uonededo 8 V0861 I9pOlN ee 1612 90 P1 uoB1og 618 190 Yai uareSspreeBAN CLOS 9028 301 AE 0125 XOR 04 d anw 16991 xa 1418 Z SS 61 481 100 009 SEIPEINI aw PIL voredepseebaN 9 1L999 RELE 220918 101 108 xejo 10983 9018 XML 990661 28901 XAO SJON PIEXOEGHAMOH 662 ez Xon paou Wet Oe eee Ayo ejeurejeno 09 BS 9 18 191 men m 1019 9812 702 191 012 9196 191 uoqsrTd o l G 600L2 301 6690 Xolel MPS A 6 BU07 Z 000 5 09 86 41 91 BISOSIN LAO HEY Badius BUUBIA 9021 7 gc semby ap y seudy 12991 X900 EIUEIGESEI SGEE BI 65p 9910 X00 grt BWIO OY epitehy aureujo7 any 2 gne E P a du Seuief 18 1308 Od ojsn amp ny OIGO Juy epiueay OB 1111 eo dei 961 Iein ato IQOUIEN 620122 XBL 92104 191 Ysid 8061 PI
143. o ensure careful handling In correspondence refer to the instrument by model number and full serial number Other Packaging The following general instructions should be used for repackaging with commercially available materials a Wrap instrument in heavy paper or plastic If shipping to Hewlett Packard office or service center attach tag indicating type of service required return address model number and full seria number b Use strong shipping container A double wall carton made of 2 4 MPa 350 psi test material is adequate c Use a layer of shock absorbing material 75 to 100 mm 3 to 4 inch thick around all sides of the instrument to provide firm cushioning and prevent movement inside container Protect control panel with cardboard d Seal shipping container securely e Mark shipping container FRAGILE to ensure careful handling f In any correspondence refer to instrument by model number and full serial number 2 7 2 8 blank Model 19808 Operation SECTION IH OPERATION 3 1 INTRODUCTION This section contains complete operating information for the 1980A B Oscilloscope Measurement System Included in this section are descriptions of all front and rear panel features local and remote operation operators checks adjustments and maintenance Also included is a Getting Acquainted exercise which is designed to familiarize the first time user with front panel operation and features 3 2 O
144. ob Use resolution To toggie between inverted and noninverted display press gt Program Codes Enter channel 1 or 2 sensitivity VS lt channel gt lt polarity gt setting gt channel i 1 vertical channel 1 2 vertical channel 2 polarity non inverted display inverted display value i exponential n ddjnd d ndd e E SP did 2 00e O3 to 1 00e 01 V div Example Change channel 1 deflection factor to 100 mV div REMOTE VS1 100e 3 lt CR gt lt LF gt codes identifier uei TOS channel value polarity 3 125 Operation Indication Comments Related Sections 3 126 Model 1980A B Vertical Deflection Factor Cont d Deflection factor of enabled channels is displayed in the CRT readout When the Control Knob is assigned to channel deflection factor the LED readout displays the parameter value and the corresponding key channel 1 or 2 is lighted Also the channel name is displayed by the CRT readout in inverse video When a recommended HP 10080 series miniprobe with division ratio readout is connected channel deflection factor is entered and displayed as the total deflection factor at the probe tip Vertical deflection factor can only be changed if the channel is on or is a trigger Source Delta Volts Trigger Delayed Sweep Trigger Main Sweep Vertical Mode Vertical Position Model 1980A B Operation Vertical Mode Description In V vs T mode the 1980A B
145. occ ani edad Sade AT Re 3 70 Text Field in the T990A B CRT Display ion dor bela ele ie eee wees 3 104 Maximum Signal Input vs Frequency 21 kHz o o oooooo LEER ae Senne hg a ee 3 108 Maximum Signal Input vs Frequency TRAZA RA ARA 3 113 Latched Mode Trigger Flag State Examples 4 urina AR CUCSRE RUE RA EURO RAE 3 117 Dynamic Mode Trigger Flag State Example es pans eos Ono Ao a ER A ERES ERE RO 3 117 Maximum Signal Input vs Frequency 24 kHz ii ci ese xu pie da 3 123 vii List of Tables Model 1980B Table ai 4 2 1 3 1 4 2 1 9 5 3 1 3 2 3 3 3 4 3 5 3 6 353 3 8 3 9 3 10 3 11 3 12 3 13 3 14 3 15 3 16 3 17 3 18 3 19 3 20 3 21 3 22 3 23 3 24 3 25 3 26 3 27 3 28 3 29 3 30 LIST OF TABLES Title i Page Specifications 4 T rrr re dant Bav sca m e reca ROA GR o ag 1 5 Recommended Test Equipmeht xo veia ERR EAS AA Lab REI 1 9 Recommended Test ACOSO c screw ue E RAO OR e a Ao C Ub RU A RACE Qt wan 1 10 Alternate Test Equipment sau ky exc OFEN E a NE ES UTE AA SUA Wl TS RASA ER ea D en 1 10 Line Fase Part NUMDerS S ooo ore A Ove asa ee cae eres WOM OUR MO PIREO A SN 2 2 ASCII Address Codes to Decimal Equivalents secco re CR EN dote C te ere 2 5 Operating Charecterislibs e vas qe A ELLE ia A AAA OP Sore te age es EA aa cg 3 3 Detailed Operating Instructions Index LL S p eee QR Va 3 5 HP IB Message Reference TablB o oues ieri aio lirici urge hd Me ati Ra e 3 18 Symbois Used in HP IB Status Advis
146. omments To quickly load the Save Recall registers via HP IB configure the instrument with a learn string then save the state in the desired register Related Sections Learn Mode Table 3 18 Functions Stored in Save Recall Registers Instrument Function Parameters Stored Advisory Messages Bandwidth Limit Character Generator Control Knob Delay Delta Time Delta Volts Horizontal Position Horizontal Mode HP IB Status Advisory Intensity Characters Intensity Lamps Intensity Trace Scope Mode Separation Dual Sweep Mode Delayed Sweep Mode Main Sweep Speed Delayed Sweep Speed Main Trigger Delayed Trigger Main Trigger View Vertical Coupling ch 1 amp 2 Vertical Deflection Factor ch 1 amp 2 Verticai Mode Vertical Position ch 1 amp 2 state state state assignment value step resolution state value step resolution state value step resolution value step resolution state state value step resolution vaiue step resolution main and delayed value step resolution state value step resolution state state value step resolution value step resolution levei value source siope coupiing level value source slope coupling state state value step resolution state value step resolution 3 87 Operation Model 1980A B Scope Mode Description The 1980A B has 3 basic display modes Volts vs time channel 1 vs channel 2 and external X Y Z This instructio
147. onversions to other commonly used codes The notation conventions used to describe HP IB codes are defined in paragraph 3 56 Notation Conventions and Definitions 3 41 Operation Model 1980A B Advisory Messages Description The instrument generates advisory messages to indicate HP 1B syntax errors incorrect key entries and special operating information The messages are displayed on the CRT in inverse video They can also be reported via the HP IB The advisories can be disabled if desired Table 3 7 lists all advisory messages and describes the conditions which cause them Figure 3 17 contains a typical advisory message display 80 339 Procedure FUIT ER S OH Program Codes Enable or disable the advisory message display AV lt state gt state O disable advisories 1 enable advisories 3 42 Model 1980A B i Operation Example Indication Comments Related Sections Advisory Messages Cont d Disable the advisory message display REMOTE AVO lt CR gt lt LF gt codes identifier s Ec ts EOS state When the advisory display is enabled or disabled from the front panel the 1980A B acceptsthe key entry and then exits the TTL At power on the advisories are enabled as a default condition In remote operation advisory messages can be programmed to cause a service request This capability is independent of whether the advisory display is enabled or disabled For mor
148. or hands on operation using the major instrument functions Instrument operating procedures and some basic measurement techniques are explained The exercise takes about 20 minutes to perform The only equipment required is a 1980A B and a probe Panel Features page 3 13 briefly describes all controls connectors and indicators Front panel features are discussed in figures 3 5 to 3 9 Rear panel features are in figure 3 10 Detailed Operating Instructions page 3 40 provide a complete operating reference for the Measurement System user They include information about the various measurements that can be made as well as complete descriptions of all controis and menu functions The instructions are arranged alphabetically by subject They are indexed by function in table 3 2 Operation Model 1980B Each instruction contains a general description that covers signal levels ranges measurement limits and other general information Following the description local operating procedures are explained and an example is given to illustrate the procedures At the end of each instruction any speciai considerations are listed that might aid the user Also inciuded are references to other instructions which contain related information 3 4 Remote Operation Knowledge of local operation is essential for the remote operator to use the full capabilities of the Measurement System Pages containing explanations of HP IB related operations are noted with the
149. or there is no current function assignment CHA ER character intensity cannot be changed when the characters are not displayed DHA OFT hi the vertical position cannot be adjusted when the channel is off or only being used as a trigger source 41 select the internal trigger source by pressing SCOPE UNDER LL the instrument is in Remote mode all keys except i P are disabled HTEOL KHOE IM HELI Control Knob is not assigned to any function Select the desired variable function by pressing the corresponding key E advisory is not reported via HP IOB Refer to Comments section of this instruction Model 1980A B 2 Operation Advisory Messages Cont d Table 3 7 Advisory Message Description Page 2 of 2 Advisory Message Description HP IB Code SELECT WERT POEM 0 DELFI to enter AV or AT mode first press channel 1 or 2 or et 14 then press E SANAL MOT EGUHD no signal is detected within the frequency or amplitude range for autoscope 15 CAL HERMES PROTECTED the rear panel calibration protection switch is set to PROTECTED calibration 16 is not possible CAL MEMORY NOT PROTECTED the rear panel calibration protection switch is set to NOT PROTECTED 17 Set it to PROTECTED before using the 1980A B AT OHLY IH AUTO E M AFTER Ti AT measurements can only be made when delayed sweep is in 18 auto sweep mode OG HOLDOFF Ev SLO BETH SH main sweep speed
150. ory licel eee M RUPEE TEN TENDS 3 20 Typical Processing Times for Various Commands ccc ccc eee nee eee ee hh I9 yr an 3 25 Confidence Test Error Messages ira a be REPERI S hw pie be ed nee Rede WEEE SRS SEU SE EA 3 32 Advisory Message Description 2 0 ce ce tee te rena te ee ee nee da me hh hr ht hn 3 44 Autoscope and Selective Autoscope Preset Conditions LL 3 48 Delay Time Step Resolution front panell A AA AAA LORS eAR eae se Gian we 3 57 Delay IMEF Ges oaks Ca LEAVE CARO hw KR Be UR Pa CS SIUE E AAA CAR CU ER ARE 3 58 Hardware Error COURS sid eod a ERO C RSEN e ea en e qo Jede Die C ac cR CR ROC CA FE 3 65 Symbols Used in HP IB Status AdVISDEV i use AE averi PETERE ANA AREA 3 70 HPB SVT Qiii dc RR EET T TT T T LIT TI TL m 3 72 19904 B initialized State 424 eoe IS E NE OUR ERES PIA GENS AN RN ANE SUR 3 74 Key to Keycode Conversion Table Lei 3 80 Keycode to Key Conversion Tabl amp i4 rss x bue Vi em REY URS EROR ero da dp onn a e ORIS PA n 3 81 Osta Message Output Format a vice ves AR ed du Vip us pula OU LEE IM ERA 3 85 Functions Stored in Saver Recalt Registers cc A Debe e hue EAR hd RE ERAT 3 87 ROS Mask Value for Service Request Conditions 0 ccc cere ee here ehh hn 3 91 Soft Kay Menu Trees idrata NAS ES OE Eae ESI o er RA 3 95 Special Text ATTIDUIES uses Dv pecus he voee d Ku EUER Red EE EE ORT A ERU ERR RR LE 3 105 1980A7B Modified ASCH Character Set cies a e in e Rr ER E
151. oupled 500 external source only Mode 1980A B Operation Trigger Delayed Sweep Cont d Select trigger slope by pressing X dly d To set trigger level press E div d and adjust with Control Knob If main and delayed trigger views are off delayed trigger view is displayed while the Control Knob is rotated The trigger threshold is representedby the center horizontal graticule line HF reject for internal or external sources can be toggled on or off by pressing SE dly d Program Codes Select delayed trigger slope source and coupling DT lt slope gt lt source gt coupling slope low to high transition high to low transition source previous source no change vertical channel 1 vertical channel 2 external 1 external 10 2 WH gt coupling AC AC LF reject AC HF reject AC LF and HF reject DC DC HF reject DC 500 DC 500 HF reiect JO oF WIN gt 0 3 109 Operation Trigger Delayed Sweep Cont d Enter delayed trigger level DL lt value gt value integer dddd leading zeroes may be omitted Trigger level value is interpreted according to the selected trigger source internal dd dd T assumed decimal point 20 00 div to 20 00 div external 1 d ddd t assumed decimal point 1 200 V to 1 200 V external 10 dd dd t assumed decimal point 12 00V to 12 00 V external 100 ddd d tassumed decimal point 120 0 V to 12
152. ower cable When connected to an appropriate power receptacle this cable grounds the instrument cabinet The type of power cable plug shipped with each nstrument depends on the country of destination F gure 2 2 shows the part numbers and associated Option numbers for the power cables and plug configurations available l Option United Option Australia Option European 900 Kingdom 901 New Zealand Continent 250 V Piug BS 1363A Plug NZSS 198 AS C112 Plug CEET VII Plug NEMA 5 15P HP 8120 1703 HP 8120 0696 HP 8120 1692 HP 8120 1521 Systems Switzerland i Denmark 250 V 220 V Ww 7 Plug NEMA 6 15P Plug CEE 22 VI Plug SEV 1011 1959 24507 Plug DHCR 107 HP 8120 0698 HP 8120 2191 HP 8120 2296 HP 8120 2956 NOTE The number listed for the plug is the industry identifier for the plug only The HP part number specifies a complete power cordset Figure 2 2 Power Cable and Mains Plug Part Numbers 2 7 HP IB Address Selection The HP IB address is displayed or changed using the keys located on the left hand side ofthe CRT ie to cin 2 3 To check the address setting set the Measurement System LINE switch to ON and press eng then s This calisthe ii menu refer to figure 2 3 The current instrument address is on the second line of the display in decimal code Address 7 is preset at the factory Table 2 2 lists the decimal equivalents of the ASCII Talk and Listen codes For a more complete listing of ASCII cod
153. pe VISICOHY RORIS Suaauiduz einig YOA dHA POZE 288 xare PITIBRISI Booo Jo THIS ong 098 6790 PPL uieupninuas 0029 EOD eh oBenues 609 O ni ond US ANNO cep IPN 099600 Od ai 25016990 PL NO Dogou sonorioag 9591120 aal 8 02 25 1160 IAL auey ajap npo np em 9 dui SOLIS gu esBery ooo PIT fld BIENSIY pipe ROMAH tace Yal aane andun ejeny Wear a y Anes rt pra I ODEVE 1645 f 590 CHANG oiv a sebo peg eng GN VASE 16 50 58 16 90 58 191 NY BMEDEUEY i 100 007 3312t E er ery A eog abia BRIT N Xale BURY 039A y sqaure dniguow LABH est raga ba oyo eAnins1 hpl ang y unang 19318 OEH Syaquiny ONG Sauostuu2e S CMM omo SE yee us m i eiie ji 91S xog Dd L6ZLS ZN IXOID y esey al ivo ee Buena exebiue aguy pry aeg anig HOWD pJeXogd jo oH seuuey 00100 Gris 0i Ap g Y sess un 402 ejqui d qoe abea 1dseB97 160 098 191 woke PIT PIBYOR d Hamo emey peog slowly pOZ 210 X9jo 6608 260 X9 9 ajjauoBinog ej ap aayy Z 109 EO 8 0d epee PIEXOE JOAO SN AUC 1 jag ebpug Le 260 OJOSJOWIY uojBullleA pug ups fenem pri puejeg S901485 oeipje ARE 10 09 9 1190 191 i BRIT RIO IGIAD EPEURO PRIBA Teli ERG ds Mensa 00990 TS RSH ome si w O d Sepe PIENO d HAMeH 1119 15 250 361 Au OPEN 2268 191 Rara 200814 PIENOEd O MAH YOdyN23 qaisrn ajwegdpy Y Ald Signe pioXoe eio uogelodu0 199118 aeuznut 9 98 VISAV IVA 057 gaoa ee sor stile P1008 iret tere 9 nuBwEsOID WY FOLLOW XML yp sedy 609 6018 LON SV3iuv OSL Obay oy epeuejy SATYAM HLAOS MIN
154. perating Characteristics The 1980A B Oscilloscope Measurement System is a two channel 100 MHz oscilloscope which can be controlled via HP 1IB Complete instrument setups can be programmed and measurement results can be reported under remote control Eight nonvolatile internal registers can be used for saving and recalling complete instrument setups during local or remote operation Measurement System capabilities can be extended by adding various internal options and plug in Expansion Modules Table 3 1 summarizes the major operating characteristics of the 1980A B Oscilloscope Measurement System For a complete description refer to Table 1 1 Specifications HP IB capabilities are summarized in Table 3 3 Message Reference Table 3 3 Local Operation Instructions for local i e front panel operation are described in the following paragraphs To learnthe basic operation of the instrument begin with Simplified Operation and the Getting Acquainted exercise Once familiar with the general operation use the Detailed Operating Instructions for complete and in depth information about operating the Measurement System Simplified Operation page 3 4 is an overview of front panel operation it provides an introduction to basic operating procedures and front panel controls An indexto the Detailed Operating Instructions is opposite Simplified Operationto guide the operator to further information Getting Acquainted page 3 6 is an exercise f
155. r externa input causes a momentary shift in delayed trigger level any Source selected to identify the trigger view signal Sweep Mode Delayed Sweep Mode Main Trigger Main Sweep Trigger Flag Trigger View Vertical Deflection Factor Vertical Coupling 3 111 Operation Model 1980A B A Description The source slope level and coupling of the trigger for main sweep can be selected from the front panel or Trigger Main Sweep via the HP IB Main Sweep Trigger Characteristics internal sensitivity channel deflection factor lt TOanV div pacca channel deflection factor 10 mV div or e om o a roa 4 mon Pe lllll c I resolution mom 9 om GR m 9 9 OP OR 9 9 Roy t n accuracy external 10 sensitivity Y 9 9 9 amp Rom e 9 NOR O9 d o9 4 9o o SY range eo o II resolution Loa oro roo 9 o RE aot 4 qo a 9 a n BSOCHEBOV oiov dex lava rata ER EA external 1 woe mos mo O8 mom m GR eos Roo hos t o P og a 5 sensitivity range PARE 0 3 oot o ON NS O9 noh 9 o9 a doa t o n d s n resolution SCCULACY Leder Tex Ed Ex nd ee dg ew eons line range nor ow 4 d rd og on n resolution 2o 7 xa Gee rea external input AC DC coupled impedance a 4 oso t Odo n 4 9 9 9 ot t om Boe Pom om bos so 9 eo on don n maximum input DC 500 coupled impedance Ro tos oom t om do s s ron o 9 od oo or
156. ransitions and receive Data messages Before beginning this check set the Measurement System LINE switch to OFF then to ON Description HP 9835 45 BASIC Set REN line true rem 7 REMOTE 7 Address 1980A B to listen and send a Data message wrt 707 IM2 OUTPUT 707 IM2 enabling a Require Service message to be sent if a key closure occurs iiu tex abu val das Press i HP IB status advisory should read H lt TR BLE 3 37 Operation Model 1980A B Un N fo Read binary status of the controller s HP IB rds 7 A STATUS 7 A interface and store data in variable A Display value of SRO bit dsp SRO DISP SRO bit 7 A BIT A 7 The SRO value should be displayed as 1 00 9825 or 1 9835 45 indicating that the Measurement System issued the Require Service message Status Byte Message This check determines if the Measurement System sends the Status Byte message in both local and remote modes This check assumes that the Measurement System is able to handshake recognize its own address and make locai remote transitions Before beginning this check set the Measurement System LINE switch to OFF then to ON Description HP 9825 HP 9835 45 HPL BASIC Conduct a serial poll and display Status Byte value rds 707 STATUS 707 A DISP A Check that the HP 1B status advisory remains off and the controller display reads CUO HP 9825 or UHP 9835 and 9845 sro Press Hota e Se
157. roceed as follows Connect probe to the input of vertical channel 1 Connect the probe tip to the front panel calibrator terminal TO SCOPE Select DC coupling for channel 1 then execute a selective autoscope Press fonte ch 1 f PAU GieehVe e Adjust divider probe low frequency compensation for correct display figure 3 16 3 53 DETAILED OPERATING INSTRUCTIONS 3 54 Using the Detailed Operating Instructions These Detailed Operating Instructions contain all the information needed to operate the 1980A B The instructions are arranged alphabetically a functional index appears in table 3 1 The following considerations should be remembered when using the Detailed Operating Instructions Procedures and examples assume the instrument is in the initialized state refer to the Initialize instruction The procedures and examples for HP IB operation include only the program codes device dependent commands needed for remote operation The HP IB command mode messages such as REN MLA MTA and UNL that are 3 40 Model 1980A B Operation OVER COMPENSATED ES RS RA 2 PROPERLY a COMPENSATED UNDER COMPENSATED i 7 80 340 Figure 3 16 Divider Probe Adjustment Display required in bus data transfers are not listed General requirements for communicating with the 1980A B are in paragraph 3 19 Remote operation Hewlett Packard Interface Bus HP IB program codes are listed in ASCII code Table 3 30 contains c
158. rt after main sweep is completed Press androtate the Control Knob until the marker goes off screen The advisory IHTEH D TRACE DKK SCEEENH is displayed as a reminder that delay time value is longer than main Sweep To zero the delay value press 4 5 duo For more information about delayed sweep refer to the Sweep Mode Delayed and Sweep Speed Delayed Detailed Operating Instructions INITIALIZE 3 16 Using Delta Volts Voltage measurements are simplified with the AV function Try this procedure for peak to peak measurements Position channel 2 so the bottom peak of the waveform is on the center horizontal graticule line Press Geese and position with the Control Knob icu to turn on and zero the AV function Now make the voltage measurement Change channel 2 position with the Control Knob until the top peak is on the center horizontal graticule line Read the peak to peak voltage expressed as AV in either the LED or CRT readout For more information about voltage measurements refer to the Delta Volts Detailed Operating Instruction INITIALIZE Press Auro SCOPE SELECTIVE 3 17 Using Deita Time Timing or frequency measurements can be made quickly with the 1980A B by using the AT function Try this basic procedure for measuring pulse risetime Change channel 2 deflection factor so that the input signal is displayed as 5 divisions peak to peak press Bese and adjust with Control Knob
159. ruments with the serial number prefix es listed under SERIAL NUMBERS on the title page An instrument manufactured after the printing of this manual may have a serial number prefix that is not listed on the title page This unlisted serial number prefix indicates the instrument is different from those described in this manual Manuals accompanying these newer instruments include a Manual Changes supplement The supplement contains change instructions for the entire Operating and Service Manual In addition to change information the supplements may contain information for correcting errors in the manuals To keep your manuals as current and accurate as possible Hewlett Packard recommends that you periodically request the latest Manual Changes supplement These supplements are identified with the print date and part number that appears on thetitle page of this manual Complimentary copies of these supplements are available from Hewlett Packard For information concerning a serial number prefix that is not listed on the title page or in the Manual Changes supplement contact your nearest Hewlett Packard Sales and Service office 1 5 DESCRIPTION The 1980A B Oscilloscope Measurement System is a complete two channel 100 MHz oscilloscope It features 2 mV div deflection factor two independent 5 nsec div sweeps main and delayed trigger view and both delta time and delta voltage functions Measurement capabilities can be extended by adding internal opt
160. s 210 mV div at least O 7 div of vertical deflection from dc to 25 MHz increasing to 1 5 div at 100 MHz External in external 10 at least 500 mV p p from dcto 25 MHz increasing to 1 2 Vp p at 100 MHz in external 1 at least 50 mV p p from de to 25 MHz increasing to 120 mV p p at 100 MHz i COUPLING Internal and External AC attenuates signals lt 10 Hz DC direct coupled HF Rej attenuates signals above approx 35 kHz LF Rej attenuates signals below approx 35 kHz EXTERNAL TRIGGER INPUTS Main and Delayed Input RC AC or DC 1 MO 2 shunted by approx 15 pF 500 DC 500 3 Maximum Input Voltage 500 DC 5 V rms 1 MQ ac or dc coupled 250 V dc peak ac at x1 kHz 1 vs 2 OPERATION BANDWIDTH Y Axis Channel 1 same as channel 1 in V vs T X Axis Channel 2 dc to 4 MHz Phase Difference Between Channels x3 dc to 100 kHz Deflection Factors same as Vertical Amplifiers XYZ OPERATION inputs are compatible with HP Model 1607A Logic State Analyzer or equivalent X AND Y INPUTS Deflection Factors 0 5 V div 20 for X 0 4 V div 20 for Y Model 1980A B General information Table 1 1 Specifications Page 3 of 4 Input Impedance approx 5 kO Maximum input Voltage 10 V ZANPUT Sensitivity pulse 250 ns wide and 4 V amplitude blanks any intensity display input impedance low power Schottky TTL gate Bandwidth approx 10 MHz Maximum input Voltage TTL level 5 V CATHODE RAY TUBE
161. sabled via the HP iB Table 3 12 Symbols Used in HP IB Status Advisory Advisory HP IB Status Indication Symbol Switched to remote mode Addressed to listen Addressed to talk Issued the Require Service message Figure 3 19 The HP IB Status Advisory LHP IB 2 Program Codes Enable or disable the HP IB status advisory BA state state O status advisory off 1 status advisory on 3 70 Model 1980A B Operation HP IB Status Advisory Cont d Example Turn off the status advisory REMOTE BAO lt CR gt lt LF gt codes identifier Comments In listen only or talk only addressing modes status advisory is enabled Hr IE displayed respectively Related Character Generator Sections HP IB Address Intensity Characters and Lamps 3 71 Operation Model 1980A B HP IB Syntax Errors Description When an error in HP IB message syntax is detected by the 1980A B it aborts the execution of the Data message Program codes up to the error are executed those following the error are ignored For more specific information on message execution refer to Receiving the Data Message paragraph 3 30 The instrument can be programmed to issue the Require Service message in response to syntax errors The type of error can then be determined by reading the error code via the HP IB Table 3 13 lists thetypes of syntax errors the instrument detects and their corresponding HP IB codes The Service Request Conditio
162. speed value Also the CRT readout displays MA Hin inverse video to indicate that the Control Knob is assigned to main sweep speed Change the main sweep speed by rotating the Control Knob Press to toggle between fine and coarse step resolution When coarse is selected sweep speed changes in relatively large steps In contrast fine provides a vernier like adjustment that is continuously in calibration Now change the deflection factor value for channel 2 Press BEES ch 2 to assign the Control Knob Notice the change in the CRT and LED readouts Change the deflection factor by rotating the Control Knob Again try making both fine and coarse adjustments Accidental changes to values can be prevented by putting the Control Knob in hold mode To select hold press S 1 To exit hold mode press any enabled variable function key For more information about using the Control Knob refer to the Control Knob Detailed Operating Instruction INITIALIZE JOPTION TEN Press ueno EET 3 14 Using the Trigger Controls With the 1980A B stable triggering is easy to establish using this general procedure Check that both the main and delayed sweeps are in auto sweep mode e s should both be lighted Select the signal source for the main sweep trigger Since the calibrator signali is connected to channe 2 press iie PEE E is displayed This is justa reminderto 3 8 Model 1980A B Operation GETTING AC
163. t be con nected to the protective conductor of the mains power cord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact The pro tective action must not be negated by the use of an exten sion cord power cable without a protective conductor grounding Grounding one conductor of a two conduc tor outlet is not sufficient protection If this instrument is to be energized via an auto transformer for voltage reduction make sure the com mon terminal is connected to the earth terminal of the power source Any interruption of the protective grounding conduc tor inside or outside the instrument or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury Whenever it is likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation Only fuses with the required rated current voltage and specified type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuse holders To do so could cause a shock or fire hazard Do not operate the instrument in the presence of flam mable gases or fumes Operation of any electrical instru ment in such an environment constitutes a definite safety hazard Do not install substitute parts or perform any unautho rized modification to the instrument Adjustments described in the m
164. t d Comments Ifa soft key menu is called all text programmed to the display is cleared Related Character Generator Sections Intensity Characters and Lamps Soft Key Menus Table 3 22 1980A B Modified ASCII Character Set pU o ZE ib ce wa ep LF CR and are not permitted within text strings 3 106 Model 1980A B Operation Trigger Delayed Sweep A Description The trigger source level slope and coupling for delayed sweep may be selected from the front panel or via the HP IB Delayed Sweep Trigger Characteristics internal sensitivity channel deflection factor lt 10 mV diV spirit gt 1 4 div dc to 25 MHz increasing to 3 div at 100 MHz channel deflection factor 2 TO mV UdIV oues exe 70 7 div dc to 25 MHz increasing to 1 5 div at 100 MHz ARGS rr e TRR aeS 20 00 div to 20 00 div EESQUUUDA sich 0 02 maior division ACCONACY AERE C ata cella 3 of reading 0 4 major div external 10 SENSITIVITY commit es gt 500 mV p p dc to 25 MHz increasing to 1 2 V p p at 100 MHz FANGS Spirali 12 0V to 12 0V resolution lt x rx ERE ETE RM EY na 20 mV ACOUTACY Sia Lad cv egi ok Ao ena e e RE 396 of reading 400 mV external 1 Sensitivity scsi wae eer tes ue 7 50 mV p p dc to 25 MHz increasing to 120 mV p p at 100 MHz Made uacua es bx Pas REY e 12 0V to 12 0V PESO a orbi 2 mV ACUC 3 of reading 40 mV external input AC DC coupled impedance o rper RETE EX
165. t internal trigger source for main and delayed Specify desired vertical channel by pressing main or diy d selects external 10 trigger source LJ Te ioe main or dly d selects external 1 trigger source main or dly d toggles trigger slope between positive and negative edge main or dly d selects low pass filter on trigger signal amp ACD E uad main or dly dj selects high pass filter on trigger signal Cannot be used in DC coupling ica fune and juez main or dly d select the coupling for external trigger inputs External Trigger Inputs Main and delayed inputs are female BNC connectors which have the special probe key contact When the recommended HP probes are connected external trigger level is displayed as the total value at the probe tip Figure 3 9 Time Panel Features Model 1980A B Operation MAIN GATE OUTPUT Provides ECL level high 0 8 V low 1 8 Vj signal that is high during main sweep DLY D GATE OUTPUT Provides ECL HP IB Connects the 1980A B to the level high 0 8 V low 1 8 V Hewlett Packard interface Bus for signal that is high during delayed remote operation Sweep CHASSIS GROUND Binding post accepts either a banana plug or 18 guage wire CAL SWITCH Front panel calibration is inhibited when the CAL switch is in the protected position VOLTAGE SELECTION Switches must be setto voltage of applied power source Refer to paragraph 2 5
166. t is a Safety Class instrument provided with a protective earth terminal The 1980A B and all related documentation must be reviewed for familiarization with safety markings and instructions before operation Refer to the Safety Considerations page found at the beginning of this manual for a summary of general safety information Safety precautions for installation operation and servicing are found in appropriate locations throughout the Operat ng and Service Manual These precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific warnings elsewhere in the manual violates safety standards of design manufacture and intended use of this instrument Hewlett Packard assumes no l ability for failure to comply with these requirements 1 4 INSTRUMENTS COVERED BY MANUAL Attached to the instrument is a serial number plate The serial number is in the form 0000A00000 It is in two parts the first four digits andthe letter are the serial number prefix and the last five digits are the suffix The prefix is the same for all identical instruments it changes only when a change is made to the instrument The letter in the prefix designates the country in which the instrument was manufactured A USA G West Germany J Japan S Singapore The suffix however is assigned sequentially and is unique to each instrument The contents of this manual apply to inst
167. t required for making the measurement Select chop vertical display mode Turn off the character generator use only the LED readout for parameter value display To toggle the character generator on or off press This key controls all characters displayed except the advisory messages and the HP IB status advisory Model 1980A B A Operation Example Comments Related Sections Character Generator Cont d Program Codes Toggle the character generator on or off SK3 Turn only the CRT readout on or off CG state gt state O CRT readout off 1 CRT readout on Turn off the CRT readout REMOTE CGO lt CR gt lt LF gt codes TET EN eee 9 c M EOS state In local or remote operation if the CRT readout is turned off with 3 SEA or the HP IB program code SK3 the following conditions turn the readout on again Power on Executing autoscope Executing selective autoscope Calling GP TIC H In local or remote operation if the CRT readout is turned off with the HP IB program code CGO calling LTO HLI or cycling the LINE switch turns the readout on again If the CRT readout is disabled via HP IB with the program code CGO andthe program code SK3 only toggle the HP IB text field on or off The state of the character PROP can be established via the HP IB by initializing the 1980A B with the IN program code Advisory Messages Control Kno
168. t to talk only mode it is always configured as a talker and does not respond to any of the bus messages Although the talk only mode may be selected from the front panel it is not supported by the 1980A B standard firmware 3 28 HP IB Turn on Default Conditions Several HP IB parameters are reset at power on However both the instrument s address and addressing mode are preserved in nonvolatile memory HP IB parameter default conditions are HP IB local mode Local lockout cleared Unaddressed if in normal addressing mode ROS mask cleared Service Request message cleared Status byte register cleared HP IB status advisory enabled 3 22 Model 1980A B Operation 3 29 Data Messages The Measurement System communicates on the HP IB primarily with Data messages The Measurement System interprets the byte on the eight bus data lines as a Data message when the bus is in the data mode Attention control line ATN false The instrument can both receive and send Data messages Input Data messages include the instrument s program codes device dependent commands used to program front panel functions menu functions and ali remote functions Output Data messages include instrument status information and the settings of specific functions Of special consideration is the Learn String which can be sent and received by the instrument It is a binary data string that contains a condensed coding of the entire instrument state The Learn Str
169. t value After the program code SG is sent to the 1980A B it is in a special state that is not indicated on the front panel After executing a routine using SG proper instrument state can be restored by sending the program code SM1 selecting V vs T mode if the main trigger source latched mode is selected the delay value must be set to zero for proper operation In latched mode the duration of delayed sweep must be considered Sweep length is not calibrated and can increase from the nominal 11 divisions to more than 40 divisions at fast sweep speeds Delay Instrument Status Horizontal Mode Reading Values Via HP IB Service Request Condition Sweep Mode Delayed Sweep Mode Main Trigger Delayed Sweep Trigger Main Sweep 3 119 Operation l Model 1980A B Trigger View Description Trigger view displays the main or delayed trigger signal This feature is a useful aid when configuring the trigger circuits It can also be used as a third channel to display reference waveforms However trigger view should not be used as a measurement channel Trigger view has two operating modes Normally main or delayed trigger view is displayed only while the trigger level for that sweep is being changed with the Control Knob If desired trigger view can also be turned on continuously from the front panel or via the HP IB Procedure To toggle main trigger view on or off press i To toggle delayed trigger view on or off
170. tack The stack is read ona first in first out basis by serial polling the instrument until bit 7 the ROS bit goes false If there are more than nine occurrances before the register stack is read the stack will contain the codes for the first eight events and for the last condition that occurred is selected 3 132 Model 1980B Operation Table 3 24 The Status Byte and ROS Mask Table 3 25 Program Code Prefix to Function Cross Reference 3 133 Operation es Model 1980A B Table 3 26 Program Codes and Format Summary CHARACTER GENERATOR NTENSITY READOUT CRT Readout intensity yi character brightness Jary brightness 6 0010 890 dh us i minimum step 102 div NOTE iin integer parameters leading zeroes may be omitted 3 134 SELE p ju02 Ai amp unung 18u403 pue sapo uie4bOAqd 9e Sigel 9 1409 Aieunung 1euu04 pue sapo uie400443 GEE AJEL 8 WO861 I9polA uongaiedo FE L E Sapo 40413 XE ZUAS gl dH EZ E 2 981 SBuuis 1x81 UIYIM peniuued Jou e pue Wo d1 carr Uud Jamod souls passeid ueeq sey Asay ou sugaui 49 9poo pesnun v x Z yo UE Y 99014 P 99014 URW c 89044 aqoid O o Ber tt aes ti ANTI z 49 p AIp E 1 yo pos p Alp p Alp BEES new Pa 8 L 9 S v L 0 HIS P HIPOW 195 18912864642 1X91 8 VOS61 BCE AJEL TED o seporkay g VOS61 c
171. tailed Operating Instructions Note Exponential values are sent by the 1980A B with the ASCII character E uppercase as the delimiter between the mantissa and the exponent General Output Data Message Format x SP H setting or status data CR LF loo EOS message Most output Data messages are signed Output data contains a maximum of 15 characters 3 32 Learn Mode If the Measurement System receives a TE Teach program code and is then addressed to talk it sends the Learn String The Learn String consists of 80 8 bit bytes containing information about front panel configuration This binary data can be stored in the controller s memory for future use The Learn String includes only those parameters that can be stored in the instrument s internal Save Recall registers The contents of the Save Recall registers however are not included in the Learn String Refer to the Save Recall Detailed Operating Instruction for information about register limitations Note The 80th byte of the Learn String is sent with the bus EOI line true to indicate end of string When the Measurement System is addressed to listen the binary data can be returned to it in a 80 byte string The Measurement System interprets the first two bytes to determine that this is a Learn string Following the 80th byte the transfer must be terminated with lt CR gt and LF When the lt LF is received the instrument changes state ac
172. ted Service Request 4mm is used in remote operation to request service from the HP IB controller Return to Local LES switches the 1980A B from remote to local mode unless local lockout is in effect CRT Adjustments FOCUS adiusts spot size for sharp display GRAT INTEN illuminates the CRT graticule for photographing ASTIG adiusts spot shape for sharp display ALIGN adjusts the horizontal alignment of the sweeps with the CRT graticule Figure 3 7 Control Panel Features Model 1980A B Operation Scope Mode T z selects normal oscilloscope mode input signals Y axis plotted vs timebase signals X axis 3 Y E in Selects X Y mode channel 1 signal Y axis plotted vs channel 2 signal X axis Timebases are disabled d RAS sae selects display mode using rear panel X Y and Z blanking inputs Disables channels 1 and 2 and timebases Blue Key shifts blue labeled keys to their alternate function E applies only tothe next key that is pressed If the next key has no blue labeled function the shift is ignored Vertical Mode and toggle corresponding channels on and off 80 81 Vertical Deflection Factor Bandwidth Limit TE www toggles bandwidth limit on or off Can be used in V vs T or 1 vs 2 modes to limit vertical response Channel inputs Channel 1 and 2 inputs are female BNC connectors which have the special probe key contact When the recommended HP prob
173. the 1980A B performs a series of internal checks These are transparent to the Related Sections operator unless an error is found The following conditions may be encountered at power on Hardware error If a hardware error is detected an error message is displayed in the LED readout Error codes and recommended responses are described in the Error Messages Detailed Operating Instruction Pressing any key except SIRE ie clears the error display CAL factor switch If the calibration factor protection switch is in the NOT PROTECTED position the advisory ri Y HOS i ECT zi is displayed Put switch in the PROTECTED position or press any to turn off the advisory T key except sen At power on the instrument is configured in the state that existed when power was disconnected However the following default conditions occur Soft key menus turned off Advisory messages enabled CRT readout enabled DC 500 vertical or trigger couplings changed to DC HP IB switched to local mode Local lockout cleared Unaddressed if in addressable mode ROS mask cleared Require Service message cleared Status byte register cleared HP IB status advisory enabled Error Messages 3 83 Operation Description Procedure Example Comments Related Sections 3 84 Model 1980A B Reading Values Via HP IB AH variable function parameter values can be read via the HP IB Output Data message format
174. the 1980B The rack mounting kits can be ordered separately from the nearest Hewlett Packard Sales office using the part numbers given in the descriptions Rack Flange Kit Option 908 This kit contains flanges and hardware for mounting the Measurement System in a standard rack of 482 5 mm 19 inches Order HP part number 5061 0077 Rack Flange and Front Handle Combination Kit Option 909 This kit contains flanges handles and mounting hardware the flanges are different than the Option 908 flanges Order HP part number 5061 0083 Standard Slide Kit Option 009 This kit contains rack mounting slides and hardware for mounting the Measurement System into HP rack enclosures Order HP part number 1494 001 7 ox 1 9 HEWLETT PACKARD INTERFACE BUS HP IB C HE IB Ao eoe a 1 10 Compatibility The standard 1980A B Oscilloscope Measurement System has an HP IB interface and can be used in automatic system applications driven by an HP IB equipped controller or computer The instrument is fully programmable via the HP Interface id General information Model 1980A B Bus The instrument s compatibility with HP IB is defined by the following list of interface functions SH1 AH1 T5 TEO L3 LEO SR1 RL1 PPO DCO DT1 CO E2 For an explanation of the compatibility codes refer to EEE Std 488 IEEE Standard and Digital Interface for Programmable Instrumentation or the identical ANSI Standard MC1 1 For more detailed information re
175. this section to described bus communications is defined in paragraph 3 56 Notation Conventions and Definitions In this manual the 1980A B program codes are listed in ASCII code Table 3 30 Commonly Used Code Conversions includes a listing of ASCII characters and some commonly used equivalent codes A quick check of the instrument HP IB functions is provided in the HP IB 1 0 Check paragraph 3 47 It verifies that the instrument can respond to or send each of the applicable HP IB messages described in table 3 3 For more information about HP IB refer to IEEE Std 488 or the identical ANSI Standard MC1 1 IEEE Standard Digital Interface for Programmable Instrumentation The Hewlett Packard catalog and the booklet Improving Measurements in Engineering and Manufacturing HP part number 5952 0058 provide an overview of bus operation and useful information about HP IB system applications 3 22 HP IB Compatibilty The Measurement System s complete bus compatibility as defined in IEEE Std 488 is presented in table 3 3 The programming capability of the instrument is further described by the twelve HP 1B meta messages in the left hand column of table 3 3 Foremost among these is the Data message Data messages contain the program codes that set the instrument s mode of operation Table 3 3 HP IB Message Reference Table 1 of 2 HP IB Applicable Instrument Response Related interface Meta Commands Functions Message and Control Lines
176. tial parameters can be signed or unsigned Specific format requirements for all program codes are given inthe Detailed Operating Instructions section of this manual They are also condensed in the HP 1B Codes and Format Summary Errors in program code format can be trapped and reported via the HP IB Refer to the HP IB Syntax Errors Detailed Operating instruction for a description of how to detect and report program code format errors 3 24 Model 1980A B Operation Table 3 5 Typical Processing Times for Various Commands Data Message Execution Time Function Comments SK7 1 lt CR gt lt LF gt SK6 1 lt CR gt lt LF gt IN lt CR gt lt LF gt AS CR LF SA lt CR gt lt LF gt TX1 any string gt RC1 1 lt CR gt lt LF gt VM2 lt CR gt lt LF gt VS1 2 00 E 3 lt CR gt lt LF gt VC1 2 CR LF HM2 CR LE HMS CR lt LE gt MS50 0E 6 lt CR gt lt LF gt DY200E 3 lt CR gt lt LF gt DL200 lt CR gt lt LF gt VM2 VC2 2 VS2 2 00E 3 lt CR gt lt LF gt HM2 MS50 0E 6 MM1 MT T 1 4 ML200 CR lt LE gt Typical 450 msec 200 msec 380 msec 3 2 sec 20 msec 64 msec 70 msec 40 msec 82 msec 114 msec 55 msec 50 msec 28 msec 140 msec 260 msec Recall instrument state from register 1 Save instrument state in register 1 Execute initialize Execute autoscope calibrator connected to both channel 1 and 2 Execute selective autoscope one c
177. ticule 9096 10096 9096 For 5 div measure 8096 ments 100 9096 8096 2096 10 and 0 reference points 20 are marked on the 10 graticule 0 10 19858 OSCHLOSCOPE MEASUREMENT SYSTEM 80 344 Main and delayed sweep speed trigger source and delay values are displayed if the timebase is on If AT mode is selected AT value is displayed instead of the delay value Figure 3 6 CRT Features 3 13 Operation Model 1980A B Autoscope TO CO executes autoscope y E E speed but preserves channel selection coupling and trigger setups COPE executes selective autoscope Instrument autoranges deflection factor and sweep Deita Time and Delta Volts selects AT mode if the Control Knob is assigned to delay BEES If Control Knob is Me ANNI E assigned to vertical position I2 ch 1 or 2 selects AV mode for the corresponding channel if the Control Knob is assigned toa A function pressing turns off that mode and restores normal delay time or vertical position control Control Knob is used to change variable function parameter values It is assigned to a function by pressing the corresponding variable function key The function value is displayed in the LED readout toggles the Controi Knob step resolution between fine and coarse puts the Control Knob in hold Beam Finder changes the gain of the vertical and horizontal output amplifiers so that when the beam is off screen it can be loca
178. tment is required Although the Measurement System may still be functionai it does require servicing 3 50 Vertical Balance Self cal Description The vertical balance self cal routine nulls gain dependent offsets in the vertical pre amplifiers The self cal Procedure indication Response routine virtually eliminates baseline shift as vertical deflection factor is changed The balance self cai should be performed whenever there is noticeable shift of the vertical baseline as deflection factor is changed To execute the balance seif cal from the front panel of the 1980A B press the following key sequence The balance self cal can be executed via HP IB by sending the Data message IN SKO 2 2 CR LF Note Do not apply any signals to channel 1 or 2 inputs while executing the balance self cal procedure While balance self cal is executing advisory message CHI or CHZ is displayed on the CRT When the balance routine is finished the Measurement System is restored to the same settings it had before the self cal was initiated If the balance routine cannot calibrate one of the vertical channels an error message is displayed in the LED readout to indicate which channel failed The instrument can be programmed to issue the Require Service message to signal this failure see the Error Messages and Service Request Condition Detailed Operating Instructions for further information Although a vertical balance self c
179. ue urew aut ey uo peluiid eje sBune ques Ino Bue 1ue4ino 1094100 101 esnj x99YO zZ uonoe es adellon 1991102 40 SBYOUMS SBEIOA eui YAYO L aao 10580 jeued 1891 au ug pakejap pue uleus AIp 988 0 Aip 2esu g abuey peedg desms l SUONONIISUI eseur ojjoj Swn 35114 eui uo JUBLINNSUI eui Buluan 910199 einpeooig uo 19MOg HP NI tt prc che 3anirddHV dVN9IS INANI ll inmoud Tit 10 dNI Em n SUOISIAID Jofewi g i oBueg uoneiedegs jeng u0 1940d G E L 902 SNIIVM FIVLICA n 380Hd Y30IAIO 3 01 I NIU dii TUVAN LS SUOISIAID JOfew y y abuey uOnisog EZUOZLIOH 3 ns84 pinos i isn 8 nis A ui Bnjd 40 JUSUINLISU aui 01 abewep SSIMIBYIO ajnpoyy uorsuedx cere ee P bonos di ui Bnjd e Buinowisi 40 Burjeisur 840199 19MOA JUSLUNIISUI yo YIUMS jeuueYyo sewn GLF abuey SIJOA 21180 Suoneanads 4 4 9 qej ui pequasep Bujei jdu umujxeul aui aastesqQ Siar ZH serguenbasy 1e eBeyoA indu wnwixey 98 0182 1 666 6 01 298 0182 D eBueg oun eyed dule pue saojenuayje indui eui abewep yim abeyoa indui eAISsaax 3 ebewep 42 sjuene 1000111 010 9Bue ejeg jeuh 3 666 666 66 91 0 d 190 JeusiQ 85n82 UBI GE jana usuaiim 82041 Jods Ausualur YBIY Aeuorels v 998 666 6 0129sUu Q Q abuey suli ejeg 3NSI1 P NOI JUSUINIAISUI BY oi 9beurep ASIMIBUIO esejd ul eg isnu sayy ur Bnjd eui pejpeisur ui Bryd ou S 8424 mia ei
180. uoneiueunsu ri NY ONOP YES BUBYRY PRAJM URIPUEN SYR teL 8 28 208 08 28 191 nama pd 1 Ay bare Y S 98699 18 0 POLLO Wi9128 019 XML NH3lSd A SOI eoasua ep OBL pOy en SNO 341 IN A01103U0W 0999 72 59r0 191 DIOYdMdH 918064 1951 pr eis eng ee sueujv 9000 HIS Hga a Eae YOIY V1SOO Gb 42 292 E07 101 AN 92018 MERI TES sosuaajg sojuewedind ON VAL LEZIE X98 TN aye qi 096 USSR PKeBeuuiny gegroo 6r 184 0695480 xaa 19019 tollo 9 PRA SR UY PN Mana z HEL AJebieo 1559 99 PL lT ERE 419389 PL 0094 SDA 014 mins p e BAOPEd 00 SE 89955 BL SIUUBABIEY SEJSOY 09 89 586 10 381 soun Supe j Uy lues uttiopeyw TS 15 104813 0221 033 osie uung ioe g IVONLEOd uepeqi Oan w I L OA 920 095 euojeBueg 393389 vara ou Lave panpe opepedy PIT EPPUED proxoeq qe jen 190118 udasor Lyi s 12 18 XO ee puganai BISNIS Bann Iag vds suenen Aa peou gn Pug SOPE 8100X091 IUSSI DUBIA 97 9106 ocene aap LO Y 69 ON 89 BINEN LEPZ 109 019 XML BIT Ald ejezieny poexoeq tapou 28 1990 7965 60 181 eod 040 024 99 RHD aR iie d rtt JO VaMaH zE9YeE 9 81 eo 98 06 2 060 PL 008 28 628 62 01 WS 81 y Nagai YH 0196 296 05 391 VIHOLDIA EMEZSIEM 096 007d Sd uds 009 9 9 506 181 PIT PIEXOEd ajmoH emaboxoy 169906 2 181 607 890 MR of USE 0001 0 Su amp d ap ouNWOD ej ap any y iep Uoroejueunist 61 WSL uoyuouipa 96629 mali d9 z MRIS IN m pra A Jaz OXON 2SP0 92 2960 301 IN OHBIARN 66 59 BL PZ ASSUISUNEY ajeduy eue Ilv 9 I88y 00bby Mei ONS IGO YOZOLI 1186242 181 pieyoed RO
181. ure 3 24 Maximum Signal Input vs Frequency 21 kHz Procedure Select main trigger source with the following keys internal channel 1 internal channel 2 external input 10 external input 1 line AC coupled AC coupled LF reject DC coupled DC coupled 506 3 113 Operation Model 1980A B Trigger Main Sweep Cont d HF reject for internal or external sources can be toggled on or off by pressing Select trigger slope for internal external or line sources by pressing To set trigger level press and adjust with Control Knob If main and delayed trigger views are off the main trigger view is displayed while the Control Knob is rotated The trigger threshold is represented by the center horizontal graticule line Program Codes Select main trigger slope source and coupling MT lt slope gt lt source gt lt coupling gt slope low to high transition high to low transition source O previous source no change 1 vertical channel 1 2 vertical channel 2 3 external 1 4 external 10 5 line coupling O AC 1 AC LF reject 2 AC HF reject 3 AC LF and HF reject 4 DC 5 DC HF reject 6 DC 502 7 DC 500 HF reject Enter main trigger level ML lt value gt value integer jdddd leading zeroes may be omitted 3 114 Model 1980A B Operation Trigger Main Sweep Cont d Trigger level value is interpreted according to the selected trigger source internal or fine
182. uto autoranged autoranged no change internal selected positive 0 5 div 0 5 V AC internal selected positive 0 5 div 0 5 V 0 5 V AC off AC autoranged selected selected no change no change 1 Vp p main sweep speed on O sec coarse off off off 0 00 div coarse main no change no change no change 2596 coarse V vs T 3 0 div no change no change no change autoranged autoranged no change no change no change set to main level refer to comments no change no change no change no change no change no change no change no change no change autoranged no change no change Modei 1980A B Model 1980A B Operation Description Procedure Example indication Related Sections Bandwidth Limit Bandwidth limit changes the roll off of the vertical signal path It is used to filter signals displayed on the vertical axis when the 1980A B is in either V vs T or 1 vs 2 mode Bandwidth limit does not affect internal trigger signals Vertical Bandwidth Characteristics limit off ee E aR L a pua SE EP UNT s 3 dB at 100 MHz limit ON PON sy et li N 3 dB at 20 MHz To toggle bandwidth limit on or off press Program Codes Turn bandwidth limit on or off BW lt state gt state O bandwidth limit off 1 bandwidth limit on Turn on bandwidth limit REMOTE codes esset AA 1o BW1 lt CR gt lt LF gt state Aa 2 is lighted When b

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