HP 8112A Operating, Programming And Servicing Manual Download Page 182

Page: 182 / 406

Slope IC

Shaper IC

This is used as a pulse generator up to 50
MHz, with the output either continuous,
gated or triggered. It is also used as a burst
generator.

This is used as a linear preamplifier and
final output pulse shaper.

The ICs and their supporting circuits are covered in more detail in
the relevant parts of the later chapters, however, the IC pin identities

are given in Figure 10.1-2.

5Ir£

fffll...

ADJ.

HOOC 2

HOOC

i..F DC

ADJUST

GNO

Ii'f'UT

NOD ADJUST 2

REF

NORM/CQtoP

LF If\A.JT

HOD ADJUST 1

TOP

VIEH

2 1

LB
L7

L4
L

SEE

NOTE 2

L L

SHAPER

T D ADJUST

VEE

vcc

GND

OOT

OUT

GAIN CELL ADJUST

VERNI ER ADJUST

VERNI ER lf\PUT

BIAS 2

BIAS

EEQ If\PUT

TOP

VIEH

TRIGGER POS

GATE/TRIGGER

1 1

CON Ef'J=IBLE

1 0

VEE

GND

TRIGGER IN

- I N

Tli'£ IN

FREQ

�T ON

ERROR OUT

1 3

1 4

1 5

1 6

1 7

1 8

1 9

2 1

SEE

a..RRENT

REF

NOTE

TIMING IC

TRIGGER GATE

ERROR CXJT

+5V

TRIGGER OUT

GND

OUT+

OUT-

OUT

BIAS

SCH1 HI

SCH1 LO

FL...K:/SLOPE

TRIGGER t-.EG

1 11'£/RATE

MOOC I N

RfNGE c
RfNGE 8

RfNGE A

GND

Rfff'

OOT

OUT

EXT C l

EXT

TOP VIE_,

SEE

TRIGGER IN

NOTE

BLRST ON

I Ol'-I REF

2 1

GNOX

ll.F

REF

1 9

SW+

1 8

s"-

1 7

I [J<

1 6

RFH'

1 5

1 0

EXT/INT

1 4

l l

PH'lSE

1 3

Ftf>

Ir-A.JT

VCO IC

NOTE:

PIN NO l IOCNTIFIED ON

LNOCRSIIE

IC BY DOT

Figure 10.1-2. Custom ICs used in the HP 8 1 1 �A

1 0. 1 -2 Instrument Overview and Troubleshooting Guide

Summary of Contents for 8112A

Page 1: ...your instrument has a higher serial number refer to Appendix C Updating which contains manual changes for later instruments Be sure to examine this supplement for changes which apply to your instrument and record these changes in the manual F i0 9 HEWLETT a PACKARD HP Part No 081 12 90004 Microfiche Part No 081 12 95004 Printed in Federal Republic of Germany January 1992 First Edition E0192 ...

Page 2: ... be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material Copyright This document contains proprietary information which is protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated into another language without the prior consent of Hewlett Packard...

Page 3: ... is published When an edition is reprinted all the prior updates to the edition are incorporated No information is incorporated into a new edition unless it appears in a prior update Edition 1 1 Print Date Manual Part No February 1984 08112 90002 January 1992 081 12 90004 E0284 E0192 This product has been designed and tested according to International Safety Requirements To ensure safe operation a...

Page 4: ... which prove to be defective For warranty service or repair this product must be returned to a service facility designated by HP The Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to return the product to the Buyer However the Buyer shall pay all shipping charges duties and taxes for products returned to HP from another country HP warrants that its software and firmwar...

Page 5: ...t special incidental or consequential damages whether based on contract tort or any other legal theory Product maintenance agreements and other customer assistance agreements are available for Hewlett Packard products For any assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are provided at the back of this manual v ...

Page 6: ......

Page 7: ...0 amplitude Output Parameters High Level HIL Low Level LOL Opera ting Characteristics Trigger Modes Normal Trigger Gate External Width External Burst Control Modes Period Delay Double pulse and Width Control High level Control Settling time within 5 of final value Output Modes Complement Disable Limit Fixed transitions Cosine transitions Linear transitions Inputs and Outputs External Input Control...

Page 8: ...t Cooling 3 6 Claims and Repackaging 3 6 Storage and Shipment 3 7 Return Shipment to HP 3 7 4 Operating Introduction 4 1 Switching On 4 2 Error Codes 4 2 Standard Parameter Set 4 4 Selecting Trigger Mode 4 5 Mode Selection 4 5 Controlling the External Trigger 4 6 Trigger Slope 4 6 Trigger Level 4 6 Manual Trigger MAN 4 6 Single Pulse 1 PULSE 4 6 Trigger Output 4 6 Selecting Control Mode 4 7 Contro...

Page 9: ... IB Connector X Out Marker Output Hold In Fuse 5 Operating Examples Introduction Triggering Examples Normal Mode Trig Mode Gate Mode External Width Mode External Burst Mode Applications Analog Applications Fixed transition mode Linear transition mode Cosine shaped transition modes Gaussian Digital Applications Fixed transition mode Linear variable transition mode Cosine shaped transition mode 4 11...

Page 10: ...st Parameter Example Vernier Example Range Change Example Stored Parameters Example Excessive Slope Calculation Example Reading parameters Standard Example Selecting Output Modes Output Controls Example Reading the Current Settings Example Timing Data Transmission Time Send Answer Implementation Time Hardware Settling Time Error Fault and Status Reporting HP IB Status Byte Limit Error Bit 0 6 1 6 ...

Page 11: ...uffer Not Empty Flag Common Task Examples Program DEL_WID Purpose Comments Program SPOLL_2 Purpose Important program lines Comments Initialization section Main section INTR_2 Purpose Comments Setup section lines 110 120 Main section Subroutine section The Service_srq subroutine ERROR_DEMO Purpose Important program lines and their function Comments LRN_DEMO Purpose Comments Learn String Delay Mode ...

Page 12: ...formance Test 8 6 Specifications 8 6 Equipment 8 6 Test Setup 1 8 6 Test Setup 2 8 7 Procedure 8 7 Pulse Width Performance Test 8 8 Specifications 8 8 Equipment 8 9 Test Setup 1 8 9 Test Setup 2 8 9 Procedure 8 9 Constant Duty Cycle Performance Test 8 10 Specifications 8 10 Equipment 8 11 Test Setup 8 11 Procedure 8 11 Output Levels Performance Test 8 12 Specifications values in parenthesis into o...

Page 13: ...stics 8 23 Equipment 8 23 Test Setup 8 23 Procedure 8 24 Delay Control Verification Test 8 24 Characteristics 8 24 Equipmeµt 8 24 Test Setup 8 25 Procedure 8 25 Width Control Verification Test 8 26 Characteristics 8 26 Equipment 8 26 Test Setup 8 26 Procedure 8 27 High Level Control Verification Test 8 27 Characteristics 8 27 Equipment 8 27 Test Setup 8 28 Procedure 8 28 Store and Recall Function ...

Page 14: ...fset Adjustments Equipment Procedure Fixed amplitude Linear Amplitude Gauss Amplitude Offset HIL C Slope Equipment Procedure 10 Introduction to Servicing Safety Considerations Safety Check General 10 1 Instrument Overview and Troubleshooting Guide Theory of Operation Trouble shooting Preparing the HP 8112A for servicing Key Jammed 0 RAM Test EOl Timing Tests 9 1 9 1 9 4 9 4 9 4 9 4 9 4 9 5 9 5 9 5...

Page 15: ...ction Troubleshooting the Power Supply Removing the fan Re fitting the fan 10 3 Servicing the Timing and Slope Generators Theory of Operation Introduction Trigger Input Trigger mode Address Decoder Mode and Range Decoders Control Input Circuits Timing IC Timing Generation RATE Mode 10 1 5 10 1 5 10 1 5 10 1 5 10 1 7 10 1 7 10 1 7 10 1 7 10 1 7 10 1 7 10 1 7 10 1 7 10 1 7 10 1 7 10 1 9 10 1 9 10 1 ...

Page 16: ...rent Mirror Pre Attenuator Signal Output Amplifier Input Voltage gain Output Trigger Output Amplifier Level Check Circuit Troubleshooting Shaper IC Inputs Transition Mode and Output Control Signals Shaper IC Amplitude vernier Control voltage Shaper IC Reference Current Shaper IC Current mirror Pre Attenuator and Output Attenuator Control Signals Offset vernier Control voltage Output Amplifier 10 3...

Page 17: ...iod Generator Control Counter reset Troubleshooting Output Address Decoder Burst Counter 10 7 Servicing the Microprocessor and Front panel Theory of Operation Introduction Read Only Memory ROM Random Access Memory RAM RAM Battery Supply HP IB General Purpose Interface Adapter Microprocessor Interface Signals HP IB Interface Signals Address Decoding Sub decoder 1 Sub decoder 2 Control Board Address...

Page 18: ...ocessor Board Keyboard Display Board B Backdating Introduction C Updating Introduction D Sales and Service Offices Information Asia Canada Eastern Europe Northern Europe South East Europe Middle East and Central Africa United Kingdom United States of America Eastern USA Midwestern USA Southern USA Western USA Other International Areas Index 10 7 5 10 7 5 10 7 5 10 7 6 10 7 6 10 7 6 10 7 15 10 7 15...

Page 19: ...signals in External Width mode 5 4 5 5 Typical signals in External Burst mode 5 5 5 6 Capacitance circuit 5 6 8 1 Period Performance Test 8 3 8 2 Delay Performance Test 8 5 8 3 Double Pulse Performance Test 8 6 8 4 Double Pulse Performance Test 8 7 8 5 Pulse Width Performance Test 8 9 8 6 Pulse Width Performance Test 8 9 8 7 Duty Cycle Performance Test 8 11 8 8 Output Levels Performance Test 8 12 ...

Page 20: ...ematic 3 10 3 9 10 3 5 Main Board Al Schematic 4 10 3 11 10 3 6 Main Board Al Schematic 5 10 3 13 10 3 7 Address decoder Simplified block diagram 10 3 14 10 3 8 Period Generator Input pin 7 10 3 16 10 3 9 Period Generator ramp signal pin 20 10 3 17 10 3 10 Period Generator output signals 10 3 17 10 3 11 Delay Generator I P O P waveforms 10 3 18 10 3 12 Delay Generator ramp signal pin 20 10 3 18 10...

Page 21: ...tic 10 7 13 10 7 8 Microprocessor Board A3 Component layout and locator 10 7 19 10 7 9 Keyboard A4 and Display Board AS Component layouts and locators 10 7 21 10 7 10 Keyboard A4 and Display Board AS Component layouts and locators Option 001 A 1 Mechanical Parts 1 A 2 Mechanical Parts 2 B 1 Example output pulse B 2 08116 66S23 UlO Ull layout B 3 08116 66523 UlO Ull schematic B 4 08116 66533 ROM la...

Page 22: ...0 3 13 Delay Generator Signal Levels 10 3 14 Width Generator Operation 10 3 15 Width Generator Signal Levels 10 3 16 Range Decoder Truth Table 10 4 1 Shaper IC Output Modes 10 4 2 Pre attenuator ranges 10 4 3 Waveform Control truth table 10 4 4 Amplitude vernier Control voltages 10 4 5 Attenuator Control truth table 10 4 6 Offset vernier Control voltages 10 5 1 A2 Address Decoder Signatures 10 5 2...

Page 23: ...7 6 Keyboard signatures 10 7 18 A 1 HP 8112A Parts Manufacturers A 4 A 2 Standard HP 8112A Master Parts List A 6 A 3 Main Board Parts List A 8 A 4 Control Board Parts List A 26 A 5 Microprocessor Board Parts List A 33 A 6 Keyboard Parts List A 37 A 7 Display Board Parts List A 40 B 1 Backdating Changes B 2 B 2 B 10 B 3 Address bus Signature Analysis B 27 B 4 Main Decoder Signature Analysis B 27 B ...

Page 24: ......

Page 25: ...of Germany Figure 1 1 Serial Number Plate FRG 1 Attached to the rear of the instrument is a serial number plate Figure 1 1 The first four digits only change when there is a significant modification to the instrument the last five digits are assigned sequentially to instruments This manual applies directly to the instruments with the serial numbers quoted on the title page For instruments with high...

Page 26: ...and parameter selections The self prompting operation and HP IB programmability of the HP 8112A ensure that it is quick and easy to use in stand alone and automatic test applications Self test and fault diagnosis are performed each time the instrument is switched on Error recognition and prompt helps the operator to recover from incorrect front panel or programming operation Note Throughout this m...

Page 27: ...wer cable HP Part Nwnber 21 10 0813 2110 0043 See Chapter 3 Installation Available The following accessories are available for the HP 8112A Item Carrying handle Bail Handle Kit Rack mount kit single HP8112A Rack mount kit Two instruments Lock Link kit for use with HP 5062 3974 HP Part Nwnber HP 5062 4001 HP 5062 3972 HP 5062 3974 HP 5062 3994 Introduction 1 3 ...

Page 28: ... Stop HP5345A P A with OPT 040 TI A to B Digital Voltmeter HP 3458A DC 0 01 V 50 V 004 acc HP 3456A P A T Pulse amplitude facility HP 3478 P A T Function Generator HP 8116A 20 MHz THD 1 HP3324A 002 P A Digitizing Scope HP 5412xT 10 GHz Bandwidth HP 54100D P A 30 ps Transition times Flatness 5 or HP 5450A 100 MHz 500 inputs P A Signature Analyzer HP 5005B T Power Supply HP 6237B 0 20 v HP 3324A P A...

Page 29: ...the performance derating factor to be used outside this temperature range within the specified operating range of 0 C to 55 C All operating characteristics given in the following sections describe typical performance figures which are non warranted Trigger modes Control modes Output Modes Inputs and Outputs Additional features General characteristics Unless otherwise stated specifications are quot...

Page 30: ...med value 5 ns Range 20 0 ns to 950 ms max PER WID DEL and DBL are mutually exclusive Range 10 0 ns to 950 ms max PER 10 ns Range 1 to 99 subject to Width specification Resolution 1 Accuracy 10 of programmed number WID and DTY are mutually exclusive Range 6 5 ns to 95 ms leading edge LEE and trailing edge TRE independantly programmable within 1 20 ratio Delay Width and Transitions are under progra...

Page 31: ...el accuracy 13 of programmed value 33 of amplitude 40 mV Repeatability factor 4 better than accuracy Settling time 100 ns LEE Preshoot Overshoot Ringing 53 10 mV variable transitions 103 10 mV fixed transitions The following sections give non warranted information on the typical operating characteristics of the instrument Trigger modes Control modes Output modes Inputs and Outputs Additional featu...

Page 32: ... DBL is selected Active input level enables pulse train last pulse always complete Width and period of first pulse may deviate 103 from subsequent pulses Pulse recovery input edges toggle output Each active input edge triggers a burst of pulses BUR 1 to 1999 pulses Width and period of first pulse may deviate 103 from subsequent pulses An external control signal applied to the CTRL INPUT BNC connec...

Page 33: ...s Linear transitions 3 linearity Inputs and Outputs External Input Threshold level Minimum amplitude Maximum Input voltage Minimum pulse width Input impedance Trig slope Control Input Bandwidth Input voltage limits Input impedance Trigger Output High level Low level Duty cycle Output impedance Propagation Delay 10 V adjustable 500 mV p p 20v 10 ns 10 kn off pos neg both Trigger and Ext Width only ...

Page 34: ...s location each stores a complete setup 100 µs 1 V pulse at 1 kHz Self test The instrument performs a self test when switched on and by HP IB command Error detection Visual and Status Byte indication of incompatible settings under range control voltage and clipped amplitude excessive transition time HP 18 Capability The HP 8112A is fully programmable except for the External Input trigger level Cap...

Page 35: ...e temperature range Operating temperature range Humidity range 15 ms 1 ms per character Status byte 15 ms 40 C to 70 C 0 C to 55 C Up to 953 RH between 0 C and 40 C Power supply 100 120 220 240 V rms selectable 53 103 48 440Hz 120 VA maximum Weight Net Shipping 5 9 kg 13 lbs 8 0 kg 18 lbs Dimensions 89 mm high 3 5 in 213 mm wide 8 4 in 445 mm deep 17 5 in Recalibration period 1 year recommended Sp...

Page 36: ......

Page 37: ...trical tests when there are signs of shipping damage to any part of the outer covers or panels Inspect the shipping container for damage If the container or cushioning material is damaged keep it until the contents of the shipment have been checked for completeness and the instrument has been verified both mechanically and electrically The contents of the shipment should be as shown in the shippin...

Page 38: ...r the country of destination The instrument power fuse is located on the rear panel o D o L I NE VOLTAGE SELECTOR o _ I _ ___ _ _ D__ o Figure 3 1 Line Voltage Selector Switches Do not change the Line Voltage Selector switch settings with the instrument switched ON or with power connected via the rear panel To change the selected line voltage 1 Remove the power cord 2 Remove the instrument top cov...

Page 39: ...must be connected to the protective conductor of the power cable This is verified by using the power cord which is supplied with the instrument Intentional interruption of the protective ground connection is prohibited In accordance with international safety standards the HP 8112A is equipped with a three wire power cable When connected to an appropriate ac power receptacle this cable grounds the ...

Page 40: ...power outlet or the cable is to be attached to a terminal block cut the cable at the plug end and re wire it The color coding used in the cable will depend on the cable supplied If a new plug is to be connected it should meet local safety requirements and include the following features Adequate load carrying capacity see specifications in Chapter 2 Ground connection Cable clamp ...

Page 41: ...r 1251 0293 The HP 8112A HP IB lines use standard TTL logic the levels being as follows True Low digital ground or 0 Vde to 0 4 Vde False High open or 2 5 Vde to 5 Vde All HP IB lines have LOW assertion states High states are held at 3 0 Vde by pull ups within the instrument When a line functions as an input approximately 3 2 mA of current is required to pull it low through a closure to digital gr...

Page 42: ... The HP 8112A is equipped with a cooling fan mounted inside the rear panel The instrument should be mounted so that air can freely circulate through it When operating the HP 8112A choose a location that provides at least 75 mm 3 inches of clearance at the rear and at least 25 mm 1 inch of clearance at each side Failure to provide adequate air clearance will result in excessive internal temperature...

Page 43: ...Office will also provide information and recommendations on materials to be used if the original packing is no longer available or reusable General instructions for repacking are as follows 1 Wrap instrument in heavy paper or plastic 2 Use strong shipping container A double wall carton made of 350 pound test material is adequate 3 Use enough shock absorbing material 3 to 4 inch layer around all si...

Page 44: ......

Page 45: ...applying power to the HP 8112A 1 Read the red Safety Summary sheet at the front of this manual 2 Ensure the Line Voltage Selector switches are set properly for the power source to be used Refer to Chapter 3 on instrument installation if necessary Do not change the Line Voltage Selector switches with the instrument switched on or with power connected to the rear panel 3 Ensure that the device under...

Page 46: ...111 111 20V Switching On 4 2 Operating LEYB 10 1DY 0 C1 L 1111 111 t20V OUTPUT e 1 IG 0 Figure 4 1 HP 8112A Front Panel OOTPUT 0 A The HP 8112A performs a self test when the power is switched on All the front panel LEDs should light momentarily If a fault is detected the word ERROR is illuminated and an error code is displayed on the front panel digital display The possible error codes are CJ A ke...

Page 47: ...pter 10 1 Troubleshooting for more information on the error codes and their causes When the self test is completed successfully the instrument automatically assumes the operating state which was active when it was last switched off excep t that the output is disabled to protect the unit under test If the instrument battery has failed the Standard Parameter Set is selected Operating 4 3 ...

Page 48: ...ment off and on again or selecting RCL 0 will revert to the Standard Parameter Set The Standard Parameter Set is detailed below Trigger mode NORM Normal Control mode CTRL Off Burst BUR 0001 Period PER 1 00 ms Delay DEL 65 ns Pulse width WID 100 µs Double pulse DBL 200 µs Duty cycle DTY 50 Leading edge LEE 10 ns Trailing edge TRE 10 ns High output level HIL 1 00 v Low output level LOL 0 00 v Extern...

Page 49: ...E E WID E BUR In normal mode a continuous pulse stream is generated In trigger mode each active input edge triggers a single output cycle In gate mode the active level of the external input signal enables output period The first output cycle is synchronous with the active trigger slope The last output cycle is always completed This mode can be used for recovery of external signal with selectable t...

Page 50: ... key respectively The current slope is indicated by the LED on the key The trigger can be switched off by pressing the currently active key again Both key LEDs will then be off Trigger Level Trigger level can be varied in the range 10 V using the LEVEL adjuster Manual Trigger This key can be used to simulate the external trigger signal MAN Single Pulse This key initiates a single pulse in TRIG GAT...

Page 51: ...ignal This external input may be any waveform in the range 20 V However the overall range within which the instrument actually responds to a control signal is 1 0 V to 10 V as shown below Do not apply voltages outside the range 20 V to the CTRL INPUT connector CTRL INPUT 10V 9 V B V 7 V 6 V 5 V 4 V 3 V 2 V 1 v lOns 100 ns 1 s 10 fl 100 s 1 ms PERIOD WIDTH and DELAY 10 ms 100 ms 1 s Figure 4 5 Rela...

Page 52: ...Figure 4 5 The decade is selected by setting PER within that decade i e PER 3 µs would mean than control input voltage cycling between 1 V and 10 V will control the period between 1 µs and 10 µs Whatever the value you select for PER the upper limit for that decade is displayed 10 µs if 3 µs was selected as above The vernier keys are inoperative and the Range key is used to change range Delay Contr...

Page 53: ...on operational in this Control mode and the button LED will blink See Figure 4 6 HIL M Maximum LOL set 7 95 8V ov 8V The dotted line shows the H ILC range Figure 4 6 High Level Control Capabilities Operating 4 9 ...

Page 54: ...ch other in the range 6 5 ns to 95 ms by setting values for LEE and TRE Maximum permissible ratio is 1 20 This key is the same as the linear mode key except that edges are co sinusoidal in shape It is important to note that the actual rise and fall times of the transitions will be up to 253 faster than the selected and displayed value for slopes of greater than 50 ns duration For slopes less than ...

Page 55: ...pulled into the same range Range Upper Limit Range Lower 6 5 Limit ns fS ms 99 9 999 9 99 99 9 999 9 99 Range 1 Range 2 Range 3 Range 4 Range 5 Range 6 Range 7 50 500 I 5 50 500 I 5 M fS Figure 4 8 LEE and TRE ranges 95 95 There is an overlap between all ranges When the currently active slope is altered so that it falls within a range above or below the non active slope the value of the non non ac...

Page 56: ...overlap range 2 3 X2 10 not in overlap X3 10 in overlap with higher range 4 Table 4 3 Active slope moves from Range 3 to Range 4 Y2 Inactive slope Change Value Reason Xl x lOO in shared overlap X2 x lO not in overlap X3 no change in overlap with higher range When this key is used to move a currently active slope up or down a range the non active slope will be automatically pulled into the Same Dec...

Page 57: ...the key The current value of the selected parameter is shown on the digital display The parameter units are indicated by the LEDs to the right of the display Adjustment The currently selected parameter is adjusted using the VERNIER and RANGE rocker keys Each VERNIER key increments or decrements the corresponding digit in the digital display Similarly the RANGE key increases or decreases the parame...

Page 58: ...s are shown on the digital display These two keys are used in conjunction with TRANSITION MODE keys It is possible to increase or decrease rise and fall times of output pulses Should you select a rise or fall time which degrades the HI1 or 101 settings an EXCESSIVE message will illuminate above the two keys and the key associated with the incompatible parameter will flash When either of these keys...

Page 59: ...ent instrument settings will be stored in the selected file To recall settings press sTO RCL The digital display now reads unx where X is the file identity number 1 to 9 The right hand vernier key is used to alter the value of X to determine which parameter set file will be recalled Now press the bottom of the center vernier key and the instrument settings will be altered to those of the stored fi...

Page 60: ...w output levels HIL LOL can be varied within the output limits Limited output mode is switched off by pressing the LIMIT key again The LIMIT key LED is lit when this mode is active Limit does not work when using HILC mode the LIMIT key will fl ash if HILC is selected to remind you that it is no longer active Pressing the COMPL key complements the instrument output pressing the key again returns th...

Page 61: ...Caution I Do not apply an external voltage greater than 5 V or electrostatic discharge to the output connector Operating 4 17 ...

Page 62: ...n Fff R9p of Germany WARNING FOR CONTINUED FIRE PROTECTION USE SPECIFIED _ LINE FUSE HP IB Connector X Out Marker Output Hold In Fuse 4 18 Operating Figure 4 12 Rear panel Refer to Figure 3 3 for a definition of the HP IB connector pins Refer to Setting the HP IB Address in Chapter 6 if you want to know how to set the instrument s HP IB address Not used with HP 8112A Not used with HP 8112A Not use...

Page 63: ...igger mode The examples list the basic operating steps in the order in which they would normally occur after switching on In the applications section examples are given of how the HP 8112A can be used in common design and test situations TR IG OUTPUT MA IN OUTPUT r 1 50 duty _J L cyc l e Figure 5 1 Typical output in Normal mode 1 Switch the instrument on using the line switch 2 If neccessary selec...

Page 64: ...off output disable mode and enable the output LED extinguished EXT IN PUT TRIG OUTPUT MAIN OUTPUT Figure 5 2 Typical signals In Trigger mode 1 Switch the instrument on using the line switch 2 If neccessary select Trig mode by repeatedly pressing the standard mode key until the TRIG LED is lit 3 Apply the external trigger signal to the EXT INPUT and select trigger slope and level as required Refer ...

Page 65: ...able the output LED extinguished EXT INPUT TRI G OUTPUT MAI N OUTPUT I I I l r 1 50 duty LJ L cyc l e Figure 5 3 Typical signals in Gate mode 1 Switch the instrument on using the line switch 2 If neccessary select gate mode by repeatedly pressing the standard mode key until the GATE LED is lit 3 Apply the external gating signal to the EXT INPUT and select trigger slope and level as required Refer ...

Page 66: ...ect external width mode by repeatedly pressing the standard mode key until the E WID LED is lit 3 Apply the E WID signal to the EXT INPUT and select trigger slope and level as required Refer to Chapter 4 Operating for information on the trigger controls 4 Select the Transition mode by pressing the key with the appropriate symbol The parameter window will be automatically illuminated 5 Select each ...

Page 67: ...trols 4 Select the Transition mode by pressing the lkey with the appropriate symbol The parameter window will be automatically illuminated 5 Select each output parameter in turn by pressing its associated key Adjust the parameter value using the VERNIER and RANGE keys Refer to Chapter 4 Operating for additional information on parameter adjustment 6 If a Control Function is required select the requ...

Page 68: ...ope Figure 5 6 Capacitance circuit Linear transition mode lndependantly variable leading and trailing edges between 6 5 ns and 95 ms can be used to generate ramps or sawtooth waveforms for Stimulation of hydraulic or pneumatic devices Mechanical tests Hysteresis of Schmidt trigger circuits Stress testing of capacitors and thyristors by measuring maximum allowed voltage increase per time max dV dt ...

Page 69: ... sub assemblies and modules Integrated circuit parameter settings o maximum clock speed o noise sensitivity and threshold level verification o set up time o hold time o propagation delay o minimum clock pulse width Linear variable transition mode Reduced relations and crosstalk Driving CMOS devices Parametric tests with manufacturer recommended transition times Cosine shaped transition mode Simula...

Page 70: ......

Page 71: ...cation 59401 90030 HP Publication 5952 0058 HP Publication 5952 0156 The HP 8112A s HP IB address is set at the factory to 12 decimal The address is stored in the instrument s RAM along with the current instrument settings You can only change the address in NORMal trigger mode immediately after switching the instrument on Pressing the LCL key at any other time displays the current address while th...

Page 72: ... front panel controls are disabled apart from The LINE switch The trigger LEVEL adjust knob The LCL key if Local Lockout is inactive You can select remote mode by sending an HP IB Remote Enable command from the system controller use the REMOTE statement in BASIC 5 0 5 1 REMOTE 712 The output signal and all instrument settings remain unchanged following a change from local to remote mode Local Lock...

Page 73: ...ce returns the value of the Status Byte Register Parallel Poll not supported by the HP 8112A ASCII string returned after a CST command contains all necessary commands to set the HP 8112A to its present state The Learn String may later be sent back to the device to place it in this state Terminators The HP 8112A accepts the following terminators Note CR LF the default EOL sequence EOI only CR LF an...

Page 74: ...P 81 12A HP Basic Statement for this is OUTPUT 712 PER 2 2 MS or OUTPUT 712 PER2 2MS Program commands can be a combination of upper case or lower case ASCII characters whereas the responses are always returned in uppercase You can send multiple programming commands on the same line The commands may be separated by a comma or a space character It is recommended to separate the commands with a comma...

Page 75: ... in just the same way as when using the front panel For example attempting to program a larger 101 than HIL OUTPUT 712 HIL 1 V LOL 2 V Refer to Error Fault and Status Reporting for details of error fault and status reporting using the HP IB Programming 6 5 ...

Page 76: ...ATE M3 Select E WID M4 Select E BUR M5 Action Mnemonic Select trigger off TO Select positive trigger slope Tl Select negative trigger slope T2 Select both T3 OUTPUT 712 11M3 T1 11 Select GATE mode with a positive trigger slope Action Mnemonic Switch off control mode CTO Select PERC CTl Select DELC CT2 Select WIDC CT3 Select HILC CT4 OUTPUT 712 11CT211 Select Delay Control ...

Page 77: ...linear output waveform transitions A parameter programming mnemonic is the sa me as its front panel description DEL delay for example Action Mnemonic Value Delimiter Set period PER NS nanoseconds Set delay DEL US microseconds Set double pulse DBL MS milliseconds Set width WID Set leading edge LEE Set trailing edge TRE Set duty cycle DTY OUTPUT 712 PER 10 MS DTY 30 Y 11 Set period to 10 ms set duty...

Page 78: ...ow level to minus 1 25 V Action Mnemonic Value Delimiter Set burst number BUR OUTPUT 712 BUR 37511 Provides a burst of 375 output pulses Action Mnemonic Most signicant digit up MU Second significant digit up SU Least significant digit up LU Most signicant digit down MD Second significant digit down SD Least significant digit down LD OUTPUT 712 11HIL 5 V SD SD SD11 Set high level to 5 V and decreme...

Page 79: ...e parameter set STO l 9 Set ident Recall parameter set RCL 0 Standard l 9 Stored set OUTPUT 7 12 STD 5 Store current parameters set on instrument as setting number j OUTPUT 712 RCL O Revert instrument to standard parameter settings Action Mnemonic Excessive slope calculation off SRO Excessive slope calculation on SRl OUTPUT 712 SRO Switches off calculation of excessive slope speeds up program e xe...

Page 80: ...ns the command to set the interrogated parameter to its present value If the current period is set to 1 ms the variable A will contain the string PER 1 00 MS after conducting the example above It is possible to read the current setting of a parameter using the interrogation mnemonics listed here Standard IPER Example 6 1O Programming IDE1 IDB1 IDTY IWID ILEE ITRE IHI1 1101 IBUR The HP 8112A reply ...

Page 81: ...be retransmitted as a program message without alteration The learn string may be altered in the computer before retransmitting it Since the learn string is made up of the several independent commands it is possible to send parts of the learn string complete commands to the instrument The description of the example program LRN_DEMO in Chapter 7 Programming Examples contains more details about the u...

Page 82: ...ith its program after this time Answer This is the time taken by the HP 8112Ato transmit a message when error reporting or learn mode Time is 1 ms per character status byte 15 ms This is the time taken by the HP8112A to interpret and carry out all the commands in received message Typical implementation times vary between 4 ms for select mode to 185 ms to recall a parameter set Typical implementati...

Page 83: ...be able to determine if an error was caused Status Reporting Structures are required For this purpose the instrument contains the Status Byte register The Status Byte Register STB is composed of seven single bit summary messages Each of the bits 0 thru 5 summarizes a specific type of error For example bit 0 represents all types of Limit errors See the operating manual of the HP 8112A Bit 6 of the ...

Page 84: ...mation about timing and programming errors using the interrogate error IER R mnemonic The HP 8112A responds with a string describing the current error conditions The descriptions are covered in subsequent parts of this section DIM E 45 OUTPUT 712 IERR ENTER 712 E Allocate memory for error string Request error information Read reply into allocated string PRINT 81 12A Error E There are two types of ...

Page 85: ...ng more than one error description IERR Description DELAY ERROR WIDTH ERROR Comments Delay value is greater than Period value i e PER 1 ms DEL 1 1 ms The front panel LEDs flash to indicate the invalid settings The ERROR LED is on Width value is greater than Period value i e PER 1 ms WID 1 1 ms The front panel LEDs flash to indicate the invalid settings The ERROR LED is on This error occurs when th...

Page 86: ...rval By suppressing EXCESSIVE SLOPE new settings for Period are accepted by the instrument without any calculation and a reduction in programming time of typically 30 ms may be achieved In the permanently stored Mode Parameter settings in the HP 8112A ROMs SR is set to O zero If these settings are recalled as current settings the Service Request function can be re activated by programming SR to 1 ...

Page 87: ...Q More than one error condition can occur at one time When using the IERR command ensure that you allow for a reply containing more than one error description IERR Description EWID PERC TRIG PERC GATE TRIG slope EWID TRIG slope Comments The external trigger input signal is passed through to the output A Control input cannot alter period delay or width Identical returns are EWID DELC and EWID WIDC ...

Page 88: ...712 LLO Local Lockout LOCAL LOCKOUT 7 GTL Go to Local LOCAL 712 LOCAL 7 GET Group Execute Trigger TRIGGER 712 TRIGGER 7 UNL Unlisten SEND 712 UNL UNT Untalk SEND 712 UNT SPE Serial Poll Enable SPOLL 712 SPD Serial Poll Disable MLA My listen address selectable MTA My talk address selectable DCL An HP IB DCL command causes the HP 8112A to load its standard parameter set The instrument remains in its...

Page 89: ...s bigger than 127 then the buffer is not yet empty Whenever the status byte is read directly after sending a command the HP 8112A should be given sufficient time to update the status byte The time needed varies with the type and number of the commands sent For single commands 100 to 200 ms should be adequate Example 10 CLEAR 712 20 A SPOLL 712 30 40 OUTPUT WID 10 MS causes error 50 WAIT 2 give HP ...

Page 90: ...rear feet and top cover Transfer jumper A3W3 at the center of the microprocessor board A3 from the factory setting EOI to position 3 The HP 8112A with old and new firmware does not pull the EOI line The device terminates all messages with CR LF and a space character If the HP 8112A is the only instrument on the bus the SPOLL statement may cause the instrument to hang up Either of the following wil...

Page 91: ...ead of the response Should your computer be too fast for the HP 8112A it will be necessary to force the computer to wait a few hundred milli seconds before reading the response after an interrogate command The HP 8112A needs time to interpret and implement the commands which it receives You need to allow for this in your controller program A summary of programming timings is given in Table 6 1 Pro...

Page 92: ......

Page 93: ...L INTR_2 Shows how to service SRQ s by using interrupts and print the error bits which are set in the status byte ERROR_DEMO Demonstrates how to determine which error bits are set in the status byte LRN_DEMO Shows how to read the Learn String with the CST command and how to send it back to the HP 8112A INTERROG Demonstrates the usage of all types of interrogate commands offered by the HP 8112A In ...

Page 94: ...errogate 8112A delay setting Print 8112A delay value END Programming applications should include an initial check that the HP 8112A is communicating correctly A suitable quick check is to set a parameter to a particular value and then read it back as illustrated by the flow chart and program example given here ...

Page 95: ...0 REMOTE Adr 1 10 120 140 OUTPUT Adr DEL 100MS 150 160 170 180 OUTPUT Adr DEL 200 210 ENTER Adr A 220 250 PRINT A 260 270 290 LOCAL Adr 300 320 END Visual Indicators Enable Remote Control of HP 8 1 12A RMT LED on Set HP8 1 12A delay to 100 ms RMT and ADS LED s on DEL key LED on 1 00 ms displayed Interrogate Delay command Input data from HP 8 1 1 2A Print on screen Printout DEL 100 MS Return HP 8 1...

Page 96: ...8112A Status Byte CONTINUE Print 8112A Fault END The HP 8112A RAM Hardware self test can be initiated via the HP IB using the EST message If a fault is detected the HP 8112A sets the System Failure and Service Request bits in its HP IB Status Byte Refer to Chapter 6 Error reporting for more information on the Status Byte ...

Page 97: ...00 IF A O THEN 210 Visual Indicators Enable Remote Control of HP 8 1 12A RMT LED on Execute Self Test command RMT and ADS LED s on Time for HP 8 1 1 2A int ernal process ing Read and clear Status Byte If Status Byte is zero HP 81 12A has a fault 220 PRINT HP 8 1 12A FAULT WITH ERROR A 64 230 Print fault message on screen which is Error 240 code minus the decimal value of the 250 Service Request 26...

Page 98: ... 8112A Read 8112A s status byte CONTINUE The Buffer Not Empty flag indicates that the HP 8112A is currently interpreting a programming message You can use the flag to make the system controller wait until a message has been implemented before proceeding This is an alternative to using the WAIT statement with a fixed delay ...

Page 99: ... DEL SONS WID 2 5 US 80 Select trigger mode with triggering on 90 posit ive slope linear transition output 100 and change period delay and width 1 10 130 REPEAT 140 A SPOLL 7 12 150 UNTIL BIT A 7 0 160 170 180 LOCAL Adr 190 200 210 END Keep polling the HP 8 1 12A status byte until Buffer Not Empty flag returns to zero indicating the command message has been implemented Return HP 81 12A to local mo...

Page 100: ... 250 to 350 every 2 second delay is incremented by 1 ms while width is decremented by 2 ms The current values are printed in the Display subroutine lines 440 to 490 Width finally reaches the value of 2 ms The output is not automatically disabled when the program is exited 10 Program name DEL_WID 20 30 This example shows how to program and increment some HP81 12A 40 parameters width and delay 50 60...

Page 101: ...the Setup and Hold t ime 3 10 OUTPUT Addr DEL New_del MS 320 OUTPUT Addr WID New_wid MS 330 340 WAIT 2 350 NEXT I 360 370 LOCAL Addr 380 PRINT Turn HP81 12A back to Local mode 390 PRINT End of the program DEL_WID 11 400 STOP 410 420 430 440 D isplay Display the current values of Delay and Width 450 PRINT Delay 11 460 PRINT USING ZZ DD New_del 470 PRINT ms Width 480 PRINT USING ZZ DD 11 11 ms New_w...

Page 102: ...ialization section The interface is initialized The HP 8112A is set to the Standard Setting and the status byte is cleared Main section In the main section XXX is sent over the HP IB to the instrument line 210 but it is not a valid command so it causes a syntax error Since the instrument needs some time to parse XXX the computer should wait a sufficient amount of time before conducting the followi...

Page 103: ...100 CLEAR 712 A SPOLL 712 Initialize Inteface and HP8 1 12A clear status byte 1 10 A SPOLL 712 read the status byte with SPOLL 120 PRINT SPOLL before the syntax error A 130 PRINT 140 PRINT XXX is output This will cause a syntax error 150 OUTPUT 7 12 XXX Cause a syntax error 160 WAIT 1 give HP8 1 12A t ime to receive XXX and update the Status Byte 170 180 A SPOLL 712 190 PRINT 1st SPOLL after synta...

Page 104: ...e set in the Status Byte are printed 10 Name of this program INTR_2 20 30 This program demonstrates hov to use interrupts to service 40 a SRQ from the HP8 1 12A 50 60 CLEAR SCREEN 70 80 CLEAR 712 90 A SPOLL 712 clear status byte 100 1 10 ON INTR 7 2 CALL Service_srq Setup service routine for SRQ 120 ENABLE INTR 7 2 Enable only service requests for interrupt 130 140 A SPOLL 712 150 PRINT SPOLL befo...

Page 105: ...N PRINT 11 Syntax Error 520 IF BIT A 1 THEN PRINT 11 Timing Error 530 IF BIT A O THEN PRINT 11 L imit Error 540 SUBEND ERROR_DEMO Purpose This program demonstrates how to determine which error bit s are set in the HP8112 Status Byte Also it is shown how to get a more detailed description of an error with the interrogate error command IERR Both functions are performed by the subroutine PrinLerrors ...

Page 106: ... ms ca uses width error 190 200 WAIT 1 210 220 HP81 12A needs time to execute a command and update the Status Byte 230 GOSUB Print_errors 240 250 DISP Pausing press Continue to continue 260 PAUSE 270 CLEAR SCREEN 280 290 PRINT Nov Width is set to 500 us This removes the cause for the errors 300 PRINT 310 320 OUTPUT 712 WID500US 330 340 WAIT 1 HP81 12A needs time to execute a command and update the...

Page 107: ...Limit Error 660 PRINT 11 11 670 680 Use the ERR command to get more detailed informat ion 690 700 WAIT 2 710 PRINT More detailed decript ion read with the ERR command 720 WAIT 2 730 740 DIM A 200 750 760 770 OUTPUT 712 11 IERR11 ENTER 712 A PRINT A Interrogate Error command 780 NOTE The HP8 1 12A s Status Byte is updated after every command 790 In this program the Status Byte was cleared by 800 re...

Page 108: ... 65 0 NS DTY 50 WID 100 US LEE 10 0 NS TRE 10 0 NS HIL LOO V LOL o oo v Learn String Double Mode active Ml CTO Tl W2 SMO LO CO Dl BUR 0001 PER 1 00 MS DEL 65 0 NS DBL 200 US DTY 50 WID 100 US LEE 10 0 NS TRE 10 0 NS HIL LOO V LOL o oo v Please refer to the listing of the program for the exact usage of the commands above The Learn String consists of upto 153 ASCII characters The time for transferri...

Page 109: ...TE Oldtime DIV 00 1 1000 280 PRINT finished 290 PRINT This took Timetaken seconds 300 PRINT 3 10 PRINT The current Learn String is 320 PRINT A 330 PRINT 340 350 WAIT 4 360 PRINT Period is set to 999 ms 370 OUTPUT 712 PER999MS 380 WAIT 4 390 400 PRINT 410 420 PRINT Sending the Learn String back to the HP8 1 12A 430 Oldt ime TIMEDATE 440 450 OUTPUT 7 12 A 460 470 Timetaken TIMEDATE Oldtime DIV 00 1 ...

Page 110: ...the command STO 1 9 For example STO 3 stores the current setting in location 3 Screen dump of the results printed when running the program INTERROG The current setting of the HP 81 12A is M1 CTO T1 W2 SMO LO CO D1 BUR 0001 PER 1 00 MS DBL 200 US DEL 65 0 NS DTY 50 Y WID 100 US LEE 10 0 NS TRE 10 0 NS HIL 1 00 V LOL 0 00 V The current setting of location 5 is SET5 M1 CTO T1 W2 SMO LO CO D 1 BUR 000...

Page 111: ... PRINT The current sett ing of locat ion 5 is 290 PRINT Sett ing 300 PRINT 3 10 PRINT 320 330 Interrogate Error ERR 340 350 DIM A 100 360 OUTPUT 712 WID 1MS cause width and slope error 370 PRINT Width and slope error caused 380 390 OUTPUT 712 IERR 400 ENTER 7 12 A 410 read error s 420 PRINT Errors read with ERR A 430 PRINT 440 450 460 OUTPUT 712 11WID 1US 11 correct error 470 Interrogate Error com...

Page 112: ...0 590 OUTPUT 7 12 11 IBUR11 600 ENTER 7 12 Burst 610 620 PRINT Response after BUR command Burst 630 640 PRINT 650 PRINT End of the program INTERROG 11 660 670 LOCAL 712 680 END 7 20 Programming Exarttples ...

Page 113: ...and External Burst modes Man 1 Pulse Limit Complement and Disable Store and Recall Functionality Period Control Delay Control Width Control High Level Control HP IB Capability The tests can be used for incoming inspection troubleshooting or preventative maintenance Note that to prove that the instrument is within specification only the Performance Tests have to be carried out The test results can ...

Page 114: ...A 002 P A Digitizing Scope HP 5412xT 10 GHz Bandwidth HP 54503A P A 30 ps Transition times Flatness 53 or HP 5450A 100 MHz 50 1 inputs P A Signature Analyzer HP 5005B T Power Supply HP 6237B 0 20 v HP 3324A P A T Attenuator HP 33340C 20 dB 2W P A T Adaptor SMA to BNC P A T Terminators HP 11048C 10 w 50 n 0 1 3 P A HP 10100C 2 w 50 n T P Performance Test A Adjustments T Troubleshooting Test Record ...

Page 115: ... 0 0 Counter H P 5 335A Figure 8 1 Period Performance Test Procedure 1 Connect the equipment as shown in the setup figure Use a 50 n feedthrough termination if you cannot select 50 n input impedance on the counter 2 Set up the HP 8112A as follows Input Mode Control Mode Transition DTY HI1 101 NORM Off Fixed 50 1 00 v 1 00 v 3 Set the counter function control to PER A 4 Set the HP 8112A Period to t...

Page 116: ...µs 9 5 µs 10 5 µs 10 ms 9 5 ms 10 5 ms 950 ms 902 5 ms 997 5 ms Range 75 ns to 950 ms Accuracy 53 of programmed value 5 ns Max Delay 1 period plus 55 ns Repeatability Factor 4 better than accuracy Max Jitter 0 2 of programmed value lOOps Equipment Counter HP 5335A Two cable assembly BNC same length 50 n Feedthrough Termination Required if counter input impedance f 50 11 8 4 Testing Performance ...

Page 117: ...M Off Fixed 50 2 40v 0 00v 3 Set the counter as follows TIME Slopes A and B Trigger levels Gate Mode A B Positive 1 2v MIN 4 Set the HP 8112A Delay and Period to the following values and read the actual output from the counter Record your results on a copy of the Test Record specified limits are given here and on the Test Record HP 8112A Cmmter reading setting DEL PER Low Limit High Limit 75 ns 95...

Page 118: ...lity Factor 4 better than accuracy Max Jitter 0 2 of programmed value lOOps Equipment Digitizing Oscilloscope with Accessory HP 54121T Counter HP 5335A Cable 50 n BNC to BNC coaxial 2 each HP 8120 1839 20 dB attenuators son feedthrough termination Required if counter input impedance f 50 n Test Setup 1 Oscilloscope HP 5412xTI ID j r1 20 dB Attenuator HP 8112A with BNC SMA Adaptor Figure 8 3 Double...

Page 119: ...o SMA adaptor and a 20 dB attenuator to Input 4 of the oscilloscope 5 Set up the HP 54121T Oscilloscope as follows a Press AUTOSCALE b Select the Display menu and set the Number of Averages to 64 c Select the delta V menu and turn the voltage markers On d Set Preset Levels 50 50 and press Auto Level Set e Select the delta t menu and turn the time markers On f Set START ON EDGE POSl and STOP ON EDG...

Page 120: ...pe transition A Preset PER A son MIN Positive 10 Set up the HP 8112A as follows Input Mode TRIG 11 Check the HP 8112A double pulse delay for each new DBL setting and at each change press the MAN key once 12 Record your results on a copy of the Test Record specified limits are given here and on the Test Record HP 8112A Oscilloscope setting PER DBL WID Low Limit High Limit 20 ms 10 ms 19 0 ms 21 0 m...

Page 121: ...h Performance Test H P 8112A 0 0 0 Counter H P 5 335A Figure 8 6 Pulse Width Performance Test Procedure 1 Set up the HP 8112A as follows Input Mode NORM Control Mode Off Transition DEL HIL LOL Fixed 65 ns 1 00 v 1 00 v 2 Connect the HP 8112A and oscilloscope as shown in Figure 8 5 3 Verify that for the following HP8112A WID settings the scope display indicates that the HP 8112A output is within th...

Page 122: ...unter as follows Trigger level Mode Impedance Gate Mode Slope A Slope B Preset Time A B 50 1 MIN Positive Negative 7 Check the HP8112A WID settings against the table below 8 Record your results on a copy of the Test Record specified limits are given here and on the Test Record HP 8112A Oscilloscope setting PER WID Low Limit High Limit 5 ms 1 ms 0 95 ms 1 05 ms 999 ms 950 ms 902 5 ms 997 5 ms Range...

Page 123: ...2 Set up the HP 8112A as follows Input Mode NORM Control Mode Off Transition PER DEL HIL 101 Fixed lOOµs 65 ns 1 00 v 1 00v 3 Set the counter to DTY CY A 4 Set the HP 8112A DTY to the following values and read the actual output from the counter Record your results on a copy of the Test Record specified limits are given here and on the Test Record HP 8112A Cowiter reading setting DTY Low Limit High...

Page 124: ...able Assemblies BNC same length son feedthrough connector 0 1 HP 8112A 0 0 50 Ohm Feedthrough connector and BNC to dual banana plug adapter Voltmeter HP 3458A Connected to EXT TRIGGER on rear of DVM Figure 8 8 Output Levels Performance Test Procedure 1 Connect the equipment as shown in the setup figure Use a 50 n 8 12 Testing Performance feedthrough termination 0 1 2 Set up the HP 8112A as follows...

Page 125: ...5 0 v 4 76 v 5 24 v 8 0 v 7 64 v 8 36 v 6 Set up the HP 8112A as follows DEL HIL 101 65 ns 0 0 v 0 10 v 7 For each value of LOL in table verify that the DVM reading is within the specified limits 8 Record your results on a copy of the Test Record specified limits are given here and on the Test Record HP 8112A DVM Reading setting LOL Low Limit High Limit 0 1 v 0 056 v 0 144 v 0 5 v 0 44 v 0 56 v 1 ...

Page 126: ...programmed value 2ns Linearity typical 3 for transition times greater than lOOns Equipment Oscilloscope HP 54121T Two Cable Assemblies BNC Test Setup Oscilloscope HP 5412xTI HP 8112A ID r1 20 dB Attenuator o r r I with BNC SMA Adaptor Figure 8 9 Transition Times Performance Test Procedure 1 Connect the equipment as shown in the setup figure above 2 Set up the HP 8112A as follows 8 14 Testing Perfo...

Page 127: ...EL 65 ns DTY 50 Transition HIL LOL Linear 5 00 v 0 00 v For the HP 8112A to the settings in the table below measure the displayed leading edges LEE and trailing edges TRE Verify that the transition times do not exceed the specified limits Record your results on a copy of the Test Record specified limits are given here and on the Test Record The oscilloscope response is very slow for measurements w...

Page 128: ...t the equipment as shown in the setup figure above 2 Set up the HP 8112A as follows 8 16 Testing Performance Input Mode NORM Control Mode Off PER 500 ns DEL 65 ns DTY 50 Transition Fixed HIL 1 00 v LOL 0 00 v 3 Adjust the oscilloscope so that one pulse fills the display 4 Examine the HP 8112A output on the scope display in order to verify that the pulse characteristics do not exceed the specified ...

Page 129: ... as follows Transition LEE TRE Linear 6 5 ns 6 5 ns 7 Examine the HP 8112A output on the scope display in order to verify that the pulse characteristics do not exceed the specified limits as identified in Figure 8 11 8 Record your results on a copy of the Test Record specified limits are given here and on the Test Record The oscilloscope trace flatness error may affect the measurement of pre and o...

Page 130: ...ulse width 500 mV p p 10 ns Each active input generates one output pulse Gate External signal enables Period Generator First output pulse synchronous with external trigger Last output pulse always completed External Width Restoration of external signal with selectable transition times and output levels External Burst Each active input transition generates a preprogrammed number of pulses 1 to 1999...

Page 131: ...ent as shown in the setup figure 2 Set up the HP 8112A as follows Trigger Mode TRIG Trigger Slope f Control Mode Off Transition PER DEL WID HIL 101 Fixed 2 0 µs 65 ns 1 0 µs 1 00 v 0 00 v 3 Set up the external pulse generator HP 8116A as follows Frequency 50 kHz Width 5 0 µs Amplitude 2 0 V Offset 0 00 V 4 Using the oscilloscope adjust the HP 8112A trigger level to allow triggering from the extern...

Page 132: ...EXT IN PUT OUTPUT TRIG OUTPUT 7 Set the HP 8112A to E WID trigger mode 8 Select Linear transition and LEE TRE to 1 µs 9 Verify that each external input pulse triggers an output pulse of the same width as shown here EXT INPUT OUTPUT TRIG OUTPUT 10 Set up the HP 8112A as follows Input Mode E BUR Control Mode Off Transition Fixed BUR 50 PER 300 ns DEL 65 ns DTY 50 HIL 1 00 v LOL 0 00 v 11 Change the ...

Page 133: ...wn here EXT IN PUT _Jl__ ___J OUTPUT Characteristics MAN Simulates an external input Test Setup 1 1 Pulse Limit Complement Disable HP 8112A Provides one output pulse in TRIG Gate and E BUR modes Implements the present output levels as output limits to protect the device under test when lit Inverts the output signal when lit Disconnects the output default at switching on Oscilloscope IHP 5412xTI ID...

Page 134: ...Off Transition Fixed BUR 472 PER 1 0 µs DEL 65 ns DTY 253 Complement Output Off HIL 2 0 v LOL 2 0 v Limit Mode Off 3 Verify that the output signal is inverted by pressing the COMPL key 4 Deselect the COMPL key 5 Verify that the DISABLE key disables the output signal 6 Re enable the output signal 7 Change Limit mode to ON 8 Press the key and verify that the vernier keys do not increase the HIL beyo...

Page 135: ...1 PULSE key and confirm that the counter reading increments to 473 Characteristics Pulse Period 1 10 ratio Control Voltage 1 0 V to 10 V Period Ranges 20 ns to 1 0 s in eight non overlapping decade ranges Bandwidth 1 kHz Equipment Counter HP 5335A Variable Power Supply HP 6237B or HP 3324A Cable Assembly BNC 2 off 50 f Feedthrough Termination BNC to Banana plug adaptor Test Setup H P 62378 or Coun...

Page 136: ... HP 8112A settings below HP 8112A Counter setting reading PER WID Low High 100 ns 10 ns 20 ns 100 ns 10 µs 1 µs 1 µs 10 µs 10 ms 1 ms 1 ms lO ms 1000 ms 100 ms 100 ms 1 0 s Characteristics Pulse Delay ratio 1 10 Control Voltage 1 0 V to 10 V Delay Ranges Bandwidth 10 ns to 1 0 s in eight non overlapping decade ranges The fixed 55 ns delay of the instrument has to be added to the delay induced by t...

Page 137: ...ns 50 ns 2 00 v 0 00 v 3 Vary the power supply or HP 3324A between approx 1 volt and 10 volts and verify that oscilloscope display indicates delay time of between 75 ns and 170 ns as shown below TRIG OUTPUTt __ 10 V O V HIL LOI _J Figure 8 17 Correct Delay Control 4 Connect the HP 8112A output to the counter 5 Change HP 8112A as follows PER WID 999 ns 300 ms 6 Set the counter as follows TIME Slope...

Page 138: ... 100 µs 1 ms 1000 ms 100 ms 1 0 s Characteristics Pulse Width 1 10 ratio Control Voltage 1 0 V to 10 V Delay Ranges 10 ns to 1 0 s in eight non overlapping decade ranges Bandwidth 1 kHz Equipment Counter HP 5335A Variable DC Source HP 6237B or HP 3324A Cable Assembly BNC 2 off Attenuator 20 dB 2 W 2 x BNC to Banana plug adaptor Test Setup H P 62378 or Counter HP 5335A 8 26 Testing Performance H P ...

Page 139: ... following HP 8112A settings the pulse width range agrees with those specified Control Voltage High Level Output Window Settling Time HP 8112A Counter setting reading WID Low High 100 ns 10 ns 100 ns 100 µs 10 µs 100 µs 100 ms 10 ms 100 ms 8 0 V to 8 0 V 8 0 v to 8 0 v into son independent of actual low level which is programmable between 8 0 V and 7 95 V in 50 mV steps 200 µs to settle within 53 ...

Page 140: ...LC Fixed 200 µs 65 ns 50 2 00v 3 Set up the HP 8116A Pulse Function Generator as follows Output Sinewave Frequency 50 Hz Amplitude 16 0 V Offset 0 00 V 4 Verify that the High level output can be varied between 8 V and 8 V while the 2 V level remains unchanged as shown below Control Input Q I J c 1 d A nnnnnr o v _JUUUUUUUUUi uv 2 v Figure 8 20 Correct High level Control 5 Set up the HP 8112A as fo...

Page 141: ...cations for user preferred mode and parameter settings One for the standard switch on instrument mode and parameter set RCL 0 One non accessible location for currently active mode and parameter settings P o ure Press sTotRcL Use right hand VERNIER key to obtain display no Press centre VERNIER key to recall the standard parameters Alter one of the parameters Press STO RCL Use right hand VERNIER key...

Page 142: ...re Note 8 30 Testing Performance Oscilloscope HP 54121T Cable Assembly BNC 2 x HP IB cable All program statements assume that the HP 8112A is at HP IB address 12 and that BASIC 5 0 5 1 is being used 1 Connect the equipment as shown in the setup figure 2 Use the following program statements to read the HP 8112A Standard Parameter Set DIM A 161 REMOTE 712 CLEAR 712 OUTPUT 712 CST ENTER 712 A PRINT A...

Page 143: ...IL 1 5 V DO OUTPUT f 12 CST ENTER 712 B PRINT B Allocate controller memory to receive second status string Change settings Request current settings from HP 8112A Read the HP 8112A settings Display the HP 8112A settings 5 Verify that the settings are the same as before except for the following W3 DO PER 10 0 MS DTY 10 Y HIL 1 50 V 6 Using the oscilloscope connrm that th HP 8112A output has the foll...

Page 144: ...8 32 Testing Performance ...

Page 145: ...ckard 81 12A 50 MHz Pulse Generator Serial No Report No Date Test Facility Test Conditions Installed Options Ambient Temperature Relative Humidity Line Frequency Special Notes PERFORMANCE TEST RECORD Page 1 of 6 Testing Performance 8 33 ...

Page 146: ...lse Generator Serial No Report No Date ____________ _ Test Equipment Use j Description Counter Oscilloscope Digital Voltmeter Function Generator Controller Model No Serial No Trace No 8 34 Testing Performance PERFORMANCE TEST RECORD Page 2 of 6 Cal Due Date ...

Page 147: ...950 ms 902 5 ms 997 5 ms Delay Period Minimum MEASURED Maximum Uncertainty 75 ns 95 ns 83 75 ns 50 µs 95 µs 47 50 µs 52 50 µs 10 ms 95 ms 9 50 ms 10 50 ms 900 ms 950 ms 855 0 ms 945 0 ms Period Double Width Minimum MEASURED Maximum Uncertainty 100 ns 20 ns 10 ns 17 0 ns 23 ns lOOµs 20 µs 10 µs 19 0 µs 21 0 µs 100 ms 20 ms lO ms 19 0 ms 21 0 ms 999 ms 800 ms 50 ms 760 0 ms 840 0 ms PERFORMANCI TEST...

Page 148: ...aximum Uncertainty 200µs 40 µs 38 0 µs 42 0 µs 5 ms 1 ms 0 95 ms 1 05 ms 999 ms 950 ms 902 5 ms 997 5 ms Duty Cycle Duty Minimum MEASURED Maximum Uncertainty 1 0 0 9 1 1 10 9 11 50 45 55 90 81 99 99 89 1 Output Levels High High Level Minimum MEASURED Maximum Uncertainty 0 1 v 0 056 v 0 144 v 0 5 v 0 44 v 0 56 v 1 0 v 0 92 v 1 08 v 5 0 v 4 76 v 5 24 v 8 0 v 7 64 v 8 36 v 8 36 Testing Performance PE...

Page 149: ...near Fast Period Leading Edge Trailing Edge Minimum MEASURED Maximum Uncertainty 100 ns 4 5 ns 4 5 ns 5 0 ns typ 100 ns 6 5 ns 6 5 ns 4 675 ns 8 825 ns Slow Period Leading Edge Trailing Edge Minimum MEASURED Maximum Uncertainty 2 µs 500 ns 500 ns 473 ns 527 ns 500 µs 100 µs 100 µs 95 µs 105 µs 2 ms 500 µs 500 µs 475 µs 525 µs 5 ms 999 µs 999 µs 949 µs l 049ms 5 ms 1 ms 1 ms 0 95 ms 1 05 ms 50 ms 1...

Page 150: ... Specification Preshoot 10 of amplitude 10 mV Overshoot Ringing 10 of amplitude 10 mV Settling time 105 ns Linear Transition Characteristic Specification Preshoot 5 of amplitude 10 mV Overshoot Ringing 5 of amplitude 10 mV Settling time 107 ns 8 38 Testing Performance PERFORMANCE TEST RECORD Page 6 of 6 MEASURED Uncertainty MEASURED Uncertainty ...

Page 151: ...ted External Width Each ext input pulse enables output pulse of same YES NO width External Burst Number of output cycles set burst number YES NO Output modes MAN key functioning YES NO Period Control 1 PULSE key functioning Limited output mode functioning COMPL key functioning DISABLE key functioning YES NO YES NO YES NO YES NO PER WID Minimwn and Maximwn achieved 100 ns 10 ns YES NO 10 µs 1 µs YE...

Page 152: ...l HP IB programming DEL Minimum and Maximum achieved 100 ns YES NO 10 µs YES NO 1000 µs YES NO 1000 ms YES NO WID Minimum and Maximum achieved 100 ns YES NO 100 µs YES NO 100 ms YES NO 2 V level remains unchanged YES NO YES NO Settling time correct STO RCL key functions correctly YES NO HP IB functioning YES NO 8 40 Testing Performance VERIFICATION TEST RECORD Page 2 of 2 ...

Page 153: ...rotective ground connection inside or outside the instrument is prohibited as this is likely to make the instrument dangerous This chapter describes the adjustment procedures which return the HP 8112A to peak operating condition after repairs are completed The procedures cover Power Supplies Preliminary Adjustments Overshoot Transition Time Adjustment Timing Shaper and Offset Adjustment Slope Alwa...

Page 154: ...cedure Reference Range Description Overshoot A1C409 0 pF open 3 3 pF Increasing the value decreases transition times and Transition increases overshoot in Fixed mode Times A1C414 as used Increasing C414 decreases overshoot at amplitudes 14 v A1C501 27 pF Pulse performance at ampl 0 1 V 0 99 V A1C502 120 pF Pulse performance at ampl 1 V 9 99 V A1C528 1 5 pF Pulse shape A1C532 0 pF open 33 pF Increa...

Page 155: ... Bias adjustment A2VR3 open or 4 3 V Both influence linearity of and A2R63 open or 51 1 kn Width Generator A2R7 4 42 used to get A2R9 WID 1 ms Adj to it s mid range A2R54 4 87 used to get A2R8 WID 20 ms Adj to it s mid range A2R243 46 4 kn endash 51 1 Influences minimum width kn A2R248 1 96 kn Influences minimum width Shaper and Offset Linear A1R317 1 78 kn Amplitude in linear mode Fixed A1R422 5 ...

Page 156: ...1 Access to the HP 8112A for Adjustments Equipment Digital Voltmeter HP 3456A Procedure 1 Connect the DVM low terminal to the ground testpoint on board 9 4 Adjustment Procedures Al 2 Test the supply voltages and if necessary make adjustments to achieve the levels given here Testpoint Adjust Result Al l5 V A1R24 15 000 V 15 mV Al 5 4 V A1R12 5 40 V 10 mV A1 5 0 V 5 050 V 50 mV A3 5 0 V 5 150 V 50 m...

Page 157: ...COMPL DISABLE LIMIT NORM Off 1 ms 65 ns 503 Linear Fixed Gaussian as reqd 10 ns 10 ns 4 99 v 4 99 v Off Off Enable Off 2 Connect the HP 8112A main output to the oscilloscope input 4 via 40 dB 2 x 20 dB attenuation 3 Connect TRIGGER OUT of the HP 8112A to the TRIG IN of the oscilloscope via a 20 dB Attenuator 4 On the oscilloscope a Press Autoscale and set for 2 V division b Set the attenuation fac...

Page 158: ...utput amplitude of 10 V symmetrical about 0 V 14 Set the HP 8112A as follows Transition LEE TRE LIMIT Linear 5 5 ns 5 5 ns Off 15 Adjust A1R318 amplitude R407 bal to achieve an output amplitude of 10 V symmetrical about 0 V 16 Alter HP 8112A Transition to Gaussian 17 Adjust A1R418 amplitude R402 bal to achieve an output amplitude of 10 V symmetrical about 0 V 18 Set up the HP 8112A as follows DTY ...

Page 159: ...lloscope trigger input via 20 dB attenuation 4 Press Autoscale 5 Adjust A1R535 to give best slope linearity in both COMPL off Norm and COMPL on modes 6 Set the HP 8112A as follows LEE TRE 5 5 ns 5 5 ns 7 Set the oscilloscope as follows a Full screen display center one pulse horizontally and vertically on the screen b Number of averages to 64 c Attenuation factor to 100 d Select the D ita V and tur...

Page 160: ...7 to 11 using 90 1103 10 103 and adjust A1C410 for overshoot 103 in both normal and complement modes 14 Set the HP 8112A as follows LOL LIMIT 2 0v Off 15 Check the overshoot at both HIL and LOL for both Fixed and Linear modes If necessary re adjust A1C530 or A1C410 to achieve the above limits Repeat steps 1 to 12 if necessary The oscilloscope trace flatness error GaAs input circuit may affect meas...

Page 161: ... 19 Set the HP 8112A to Linear transition 20 Measure the transition times are 6 2 ns Transition times can be increased by increasing the overshoot If Overshoot Transition times adjustment cannot be achieved within specification change values of A1C532 C409 See table 9 1 and repeat steps 1 to 15 Adjustment Procedures 9 9 ...

Page 162: ...dthrough to the counter 4 The typical period accuracy of the period decades is as shown in Figure 9 4 2 ERROR 2 PERIOD Figure 9 4 Decade Accuracy 5 Adjust the range high end with A2R4 for approx 13 above the programmed value i e l Olms 6 Alter HP 8112A PER to 9 99 ms 7 Adjust the range low end with A2R6 for approx 13 above the programmed value i e 10 lms 8 Alter HP 8112A PER to 5 0 ms 9 Check that...

Page 163: ...P 8112A as follows Trigger Mode NORM Control Mode Off PER 50 ms DEL 1 ms DTY 203 Transition HIL LOL COMPL DISABLE LIMIT Fixed 3 0 v 0 0 v Off Off Off 19 Set the counter as follows A B Time interval Trigger both chan 1 DC Z 50 n 20 Connect HP 8112A Trigger Output to channel A of the counter 21 Connect HP 8112A Output to channel B of the counter 22 Set trigger levels to trigger at about 503 of ampli...

Page 164: ...ut via a 20 dB attenuator to Ext trigger of the HP 54121A 32 Connect HP 8112A Output via a 20 dB attenuator to input 4 of the HP 54121A 33 Press Autoscale and adjust A2Rl3 for 18 ns 0 3 ns at 503 of amplitude See Figure 9 5 50 Ampl 18ns DBL i 200ns PER 1 Figure 9 5 Double Pulse Adjustment 34 Alter HP 8112A DBL to 99 9 ns 35 Adjust A2R61 for 100 ns 1 ns at 50 3 of amplitude 36 Alter HP 8112A DBL to...

Page 165: ...for about 1 above programmed value 1 01 ms 6 Set the HP 8112A WID parameter to 9 99 ms 7 Adjust the range low end with AlRll for about 1 above programmed value 10 1 ms 8 Set the HP 8112A WID parameter to 3 5 ms 9 Check the mid range for 3 5 ms 50 µs 10 Repeat steps 5 to 9 adjusting again if necessary for the best compromise If the adjustment is not possible alter the value of A2VR3 R63 see table 9...

Page 166: ...t 503 of amplitude See Figure 9 5 15 Alter HP 8112A WID to 99 9 ns 16 Adjust the low range end with A2R59 for 101 ns 0 2 ns 17 Repeat previous six steps and re adjust if necessary 18 Alter HP 8112A WID to 50 ns 19 Check that Min width is 50 ns 2ns 9 14 Adjustment Procedures ...

Page 167: ... to TIME Interval A B COM A f B Trig level 0 v z son 3 Connect the HP 8112A main output to channel A of the counter 4 Observe the counter whilst switching the HP 8112A output from COMPL on and COMPL off S Step the HP 8112A WID with the vernier until the counter reads exactly the same Exactly SO Duty Cycle 6 Set the HP 8112A for STO 9 7 Disconnect HP 8112A from the counter 8 Set the HP 8112A as fol...

Page 168: ...sible change value of A1R437 see table 9 1 and repeat steps 1 to 15 16 Set the HP 8112A as follows HIL 101 0 5 v 0 5 v 17 Set up the DVM to read AC voltages up to 10 V Switch filter OFF or remove external filter 18 Adjust A2R46 for 0 506 V 5 mV RMS 19 Use the DVM built in filter and set the DVM to read DC voltages If the DVM does not have a built in filter use an external low pass filter as shown ...

Page 169: ... v Off 30 Set up the DVM to read AC voltages up to 20 V Switch filter OFF or remove external filter 31 Check that the amplitude for FIXED LINEAR and GAUSS transition mode is 8 080 V 0 40 mV RMS 32 If re adjustment is necessary repeat Fixed Linear and Gauss adjustments as required Offset 33 Set up the HP 8112A as follows HIL LOL 8 00 v 7 90 v 34 Set up the DVM to read DC voltages up to 10 V 35 Conn...

Page 170: ... 00 v 0 0 v Off Off Off 41 Connect the HP 8112A output via an exact 50 n 0 13 feedthrough to the oscilloscope HP 54503A 42 Adjust A2R50 for 0 V amplitude no signal 43 Set the HP 8116A Signal Generator as follows Trigger Mode FREQ AMPL DISABLE NORM 2 Hz 8 V symetrical Off 44 Connect the signal to the HP 8112A CTRL INPUT 45 Adjust A1R506 for minimum change in the waveform baseline ...

Page 171: ...n Linear LEE 100 µs TRE 500 µs HIL 4 00 v LOL 4 00 v COMPL Off DISABLE Off LIMIT Off STO 1 Oscilloscope H P 54121T HP 8112A ID 8 o w1 Attenuators 40d B 2x20 20dB Figure 9 7 Slope test setup 2 Set the HP 8112A as follows LEE STO 999 µs 2 3 Set the HP 8112A as follows LEE 500 µs STO 5 4 Set the HP 8112A as follows TRE 100 µs STO 3 5 Set the HP 8112A as follows Adjustment Procedures 9 19 ...

Page 172: ... adjust if necessary 14 Set the HP 8112A as follows RCL 5 15 Check LEE on the oscilloscope for 510 µs and 480 µs 16 Step LEE up and down using the vernier keys and observe the oscilloscope for 23 deviation 17 Set the HP 8112A as follows RCL 3 18 Observe TRE on the oscilloscope 903 103 of amplitude and adjust A2R38 for about 0 53 below programmed value i e 99 5 µs 19 Set the HP 8112A as follows RCL...

Page 173: ...teps cannot be achieved repeat steps 1 1 to 26 for the minimum difference between LEE and TRE 31 Set the HP 8112A as follows PER LEE TRE 500 ns 100 ns 100 ns 32 Connect the HP 8112A to the HP 54121A oscilloscope using two 20 dB attenuators 33 Set the oscilloscope to display one pulse and set it to measure Rise Fall time 34 Observe the oscilloscope and adjust A1C304 for best compromise of LEE and T...

Page 174: ...9 22 Adjustment Procedures P O RI ED RY ADJUSTMENT POINTS HP 8 I 12A BOARD Al 23V ADI IRl9 1 J c BLJ SV cBLJ 5 Z 15V crr J l3V m o RSI Figure 9 8 Adjustment Points on the Main Board A1 ...

Page 175: ...s n TRE L J 999us OFFSET 7 95V WID 99 9ms n LEE 1 00us n TRE 100us D HILC j 0V WW PERIOD n PERIOD 9 99ms EJ 99 9ms PERIOD n DBL lms L Jl J 99 9ms nPERIOD 20ns n WI DTH 9 99ms WIDTH n n DEL lms ms WIDTH n n DBL 50ns 20ns DELAY 9 99ms Figure 9 9 Adjustment Points on the c ontrol Board A2 Adjustment Procedures 9 23 ...

Page 176: ......

Page 177: ...tive devices Ensure that static safe precautions are taken to prevent electro static discharge when the instrument covers are removed The following safety checks must be carried out after any servicing is completed 1 Disconnect the power cord from the external voltage supply 2 Inspect the interior of the instrument for any signs of abnormal overheating or arcing such as Discolored circuit board Di...

Page 178: ...that the correct line fuse is fitted 7 Check that all safety covers are fitted 8 Check that all inter connecting co axial and flat cables are properly connected 9 Check that all boards are properly fitted 10 Check that the heatsink connections between the main board and the front frame member are secure 11 Inform Hewlett Packard of any repeated failures of any of the checks or any other safety fea...

Page 179: ...ontrol Board Servicing the Microprocessor and Frontpanel This chapter covers the shaper IC amplitude modulator current mirror pre attenuator signal output amplifier output attenuator and the trigger output amplifier This chapter covers the byte offset latches Digital to Analog Converters timer reference circuits and the width vernier current source This chapter covers the microprocessor board incl...

Page 180: ... Board Assemblies Servicing Chapters Assem bly Reference Chapter s Main Board Al 10 2 10 3 10 4 Control Board A2 10 5 10 6 Microprocessor Board A3 10 7 Keyboard A4 10 7 Display Board A5 10 7 10 4 Introduction to Servicing ...

Page 181: ...ation of the instrument by reading inputs from the front panel keyboard or the HP IB and sending the appropriate data to the Digital to Analog Converters DACs which control the generator hardware It also updates the front panel LEDs and display in response to the keyboard and HP IB inputs The generator hardware contains three specially developed HP ICs Timing IC This is used as triggerable pulse g...

Page 182: ...TD ADJUST VEE vcc GND OOT OUT GAIN CELL ADJUST VERNI ER ADJUST VERNIER lf PUT BIAS 2 BIAS I EEQ If PUT TOP VIEH TRIGGER POS L2 GATE TRIGGER 1 1 CON Ef J IBLE 10 VEE GND TRIGGER IN IN Tli IN FREQ IN T ON ERROR OUT 1 3 14 15 1 6 1 7 1 8 1 9 20 2 1 22 SEE 23 a RRENT REF L NOTE 24 TIMING IC TRIGGER GATE ERROR CXJT 5V TRIGGER OUT GND OUT OUT OUT BIAS S 2V SCH1 HI SCH1 LO FL K SLOPE TRIGGER t EG 1 11 RA...

Page 183: ...s are removed 1 Remove the rear of the instrument by unscrewing the two TORX fastening screws 2 Remove the single screw securing the instrument s case underneath the instrument 3 Remove the case by sliding it backwards You may need to use a screwdriver in one of the case ventilation holes to gently lever the case back It is held tightly by the RFI seals at the front of the frame 4 Remove the four ...

Page 184: ... POWER ON KEY JAMMED LAMP TESTS RAM TESTS TEST T I M I NG TESTS DELAY OK YES W I DTH LEE TRE OK YES A 1O 1 4 Instrument Overview and Troubleshooting Guide YES 0 YES 1_ n I L LI I NO I_ L NO I I NO I I i STOP ...

Page 185: ...dback U141 or trigger input stage UlOl LDO and QlOO See Chapter 10 3 E12 Delay generator U220 is not able to supply a pulse of 3 ms when in positive trigger mode and triggered via the Period generator Possible failure of Delay control circuit U5 U7 Error feedback U140 or level shifter Q200 See Chapter 10 3 E13 Width generator U240 is not able to supply a pulse of 9 ms when in positive trigger mode...

Page 186: ...A F I XED MODE OK MAN OK LI NEAR MODE N _o _ E 3 N _ o __ E 3 2 1 ___ _N _ o __ E J J 1 N _ O __ E 3 I LETm RC N _O i E 3 s ___ _ OK YES B 10 1 6 Instrument Overview and Troubleshooting Guide ...

Page 187: ...e generator U301 Shaper IC U401 and output pre attenuator and amplifier Refer to Chapters 10 5 10 3 and 10 4 E32 When software triggered low a fixed mode positive pulse is not detected Possible failures as in E31 E33 When software triggered high a fixed mode negative pulse is not detected Possible failures as in E31 E34 When software triggered low a linear mode negative pulse is not detected Possi...

Page 188: ...B END 1O 1 8 Instrument Overview and Troubleshooting Guide N E 3 5 N _ O E 3 1 r No E 5 r N E s 2 ...

Page 189: ...f 10 ms Range 7 out of limits Possi faults as in E35 E41 Amplitude range 2 9 99 V not possible Possible faults Pre attenuator circuit Amplitude control circuit U23 to U25 Offset control circuit U20 to U22 See Chapters 10 5 and 10 4 Test E42 Amplitude range 1 1 V not possibl Possible faults as in E41 Burst Tests HP 8112A set to produce a burst of 10 pulses of period 250 µs E51 Burst counter supplie...

Page 190: ......

Page 191: ...rmer Voltage rectifiers and regulators Voltage and current sensing circuits Power down detection circuit Lil E SELECT 23V Figµre 10 2 1 Power Supply block diagram Refer to Figure 10 2 2 The line voltage selector switches S2 and S3 connect the incoming line voltage lines to an appropriate pair of transformer inputs The transformer provides six ac outputs and an earth line to the bridge rectifiers T...

Page 192: ...2 V Rll and R12 UlC compares the 5 1 V supply with this reference voltage and drives the regulator transistor Ql via driver transistor Q2 until there is zero difference If the current drawn from the 5 1 V supply is excessive a distinct voltage drop develops across R2 UlD detects this and its output switches toward the negative supply This forward biases diode CR8 switches off Q2 and Ql and hence t...

Page 193: ...s switched off the 5 1 V supply breaks down faster than the 5 V reference because it is loaded by the microprocessor board This is detected by U2A which switches its output towards its positive supply This Power Down Detected signal is used on the microprocessor board to ensure that the microprocessor and HP IB switch off cleanly Refer to Chapter 10 7 Servicing the Microprocessor Servicing the Pow...

Page 194: ...10 2 4 Servicing the Power Supply ...

Page 195: ... LINE VOLTAGE 8EL CTIIR PIO A l MA I N 80 l S3 248 75A I I 1 1211 248 22flV lBBV I 5A I I 8 J1 3 1211V F 1 ill 918 L I NE I 0 8 ON F I LTER 0 928 9 J l 4 98 89 J1 5 MODEL HPB1 1 2A FIGURE 1111 2 2 MA IN BOARD Al SCHEMATIC 1 SERV ICING THE POWER SUPPLY 10 2 5 ...

Page 196: ......

Page 197: ......

Page 198: ...RI IK J 1 zv RU 141 C3 RS 113 5V llV y I II REF ERENCE CIRCUIT I Rl3 CIZ CllZ RI 1 iZZlkJ illu 11 IK 14 3 SERV I CE Al 117 J4Cl2 TO A2 J4 CONTROL BO ill J4Cl3 NORMALLY CRI 7 R28 RI 11 IK lK Rll II 1 115 l5V l6V I II r 11u _ 1 t rr o o 23Y I Oll Cla T 1u V is au Al 117 J3C3 TO A3 J3 l MICROP BO J3C2 MODEL HPB1 12A rIGURE UJ 2 3 _J MAIN BOARD Al SCHEMATIC 2 SERV ICING THE POWER SUPPLY 1e 2 7 ...

Page 199: ...to the rear of the frame 3 Take out the fan assembly 1 Orient the fan so that the arrow on its case indicating the direction of air flow points to the rear of the instrument and is on the bottom 2 Secure the fan to the rear of the frame using the four screws keeping the arrow at the bottom and pointing outwards 3 Plug the red cable onto the pin marked 2 on the main board routing the cable between ...

Page 200: ...r r 1 I 1 LI _ _ __ J L_____ J L_____ J Qf 01 UJ U S cc u w r 1 r JI J Q3 _ Uf 1 U4 5 5 I I I I C 1 I I l c 3 I I 1 C4 1 11 C S I I J ___ I _ I ___ _ _ _ _ I C 2 l I I I ___ I C f l _ _ Figure 10 2 5 Power supply components Underside of main board A1 Note The main component layout and locator for the main board A l are in Chapter 10 4 10 2 10 Servicing the Power Supply ...

Page 201: ...ithout affecting the external trigger source When enabled by TON the External Input signal from the front panel is buffered by Op amp UllOB and shifted to produce an input in the range 4 3 V to 0 4 V for the TRIG IN input for the period generator U200 The actual triggering level is controlled by the front panel level control R119 via Op amp UllOA When the external trigger signal matches the select...

Page 202: ...hes that select control and trigger modes and the switching transistors which select the range capacitor to be used by the slope IC Refer to Figure 10 3 4 The control input signal is clamped within 5 V by the protection diodes CR130 to CR132 For Period Delay and Width control the input voltage is rectified by precision rectifier U132B and associated components The signal then passes to the control...

Page 203: ...gital control signals into the input store 1 1 GATE TRIG LD7 Selects trigger or gate 12 TRIG POS LD6 Positive trigger 13 TRIG NEG LD5 Negative trigger 14 TIME RATE LD4 Selects TIME or RATE mode 15 MODE LD3 Always 0 in this application 16 RANGE C LD2 Range selection refer to Table 10 3 3 17 RANGE B LDl 18 RANGE A LDO Timing Generation The main timing element of the IC is a voltage controlled oscill...

Page 204: ...in 4 current derived from the appropriate DAC on the control board A2 and the TIME IN Pin 5 current derived from the control input via the control mode switch U130 The signal passes through a divider circuits before being applied to the VCO RATE Mode In the RATE mode the timing IC output is a 50 duty cycle square wave whose repetition rate is directly related to the internal range data and the IFR...

Page 205: ...r with a fixed current HI 0 mA LO 12 mA and a fixed transition time of 2 5 ns Error Output The error output from the timing IC indicates that a trigger signal has been received before the completion of the previously triggered event Period Delay and Width signals are generated by Timing ICs U200 U240 and U220 respectively L U200 OUT f4 PERIOD U220 OUT j f4 DELAY C DELAY MUST BE LESS THAN PERIOD j ...

Page 206: ... analog inputs internal range data and triggering mode See Figure 10 3 2 for an example of signal generation A delay time greater than the periodic time will cause ERROR OUT to become active Normal output OUT is passed via level shifter Q220 to the width generator trigger input Width Generator The width generator working in TIME mode produces an output of equal repetition rate to its trigger input...

Page 207: ...assed via ECL circuitry to the EECL output pin 21 See Figure Figure 10 3 3 An error output is available at pin 23 this goes active if a trigger input is detected whilst the IC output is still active Linear and Gaussian Transitions In linear and gauss slope modes a differential output OUT OUT is used to drive the Shaper IC See Chapter 10 4 to produce output pulses with variable transition times Whe...

Page 208: ...w discharges via the current mirror at a rate set by Idown ref to 0 V At this point Idown is diverted via the internal diodes and the current mirror circuit and the capacitor voltage remains at 0 V until the next trigger is detected Range Switches The ramp timing capacitance is selected from range latch U300 Slopes from 100 µs to 95 ms are possible with the external capacitors slopes less than 100...

Page 209: ...5V lc1 1 3 3p 2 MODE DECODER Ulll D 74Ul273N II AOI ACI TO U131 ll TO U131 8 TO Ul TR I GGER LEVEL C I RCU I T RUI 23 31 FROM FRONT PANEL J2 I l Rl29 RU9 3 1 4 l IK f TIU L YEI llK I I ADJ L J _ Ulll 11 llV Rl31 5 UK R131 13 31 RU7 RUI 332 3 82K CIU31 CR131 15V Rl39 8 25K CR132 R132 8 25K s zv CUI J I tu C133 Rl41 2 Zn 21 llK R127 51 l CR133 Rll4 29 IK 5V R135 II SK R138 2 15K R134 R137 2 BIK 81 I...

Page 210: ...7p lcuz cua l lK Tl lu Tl lu v 11111 v ZIK lliJ s zv RUZ a ac Rlll 11 1 _ Ulll 8 llC 1IK _ Ulll 11 s zv CONTROL MODE SELECTOR sV 11 n II RANGE DECODER Rlm 5V IX4 7K 5 ZV 74LllZ73N 11 BURST FF 5 ZV MODEL HP81 1 2A rIGURE Ill 3 4 J MAIN BOARD Al sa MATIC 3 SERVICING THE TIMING AN SLOPE GENERATORS Ul 3 9 ...

Page 211: ...llE 11212 NIAl 08 llECOOEll I ClJT l _ Ill RANllE CONTRal L____ 7 TRla 111 I l TRI 1 8 rvT Dl Olla II _ _0294 r POllElt i 1 TRIG SIGNAL VEE 8U PLY I 112115 tl 2Y nt Sl l C2 3 l tfN p 8 19 23 p 947u 1llR2ll 2111 I tl 2Y at299 Clml Z2p R2a 111 1 17 17 2 DI GENE ill JIW R22ll 24 IK 112211 31 BIC ill v lt228 l ill LC224 C222 81 IK J lu l 7 8 I Y IN YD n IN 0 Dt Cl t_ r 4 VEE tl 2Y 1 n1 L 299 ll AD a 1...

Page 212: ...23 R224 1 IK 11 ZV U24fll RATEi N C 15 N C 9 N C 4 15V ERROR FEEDBACK C LD121 LD2 LD7 l o 0 fil LEVEL CHECK N C 741 S311711 AUTO VERN I ER FEEDBACK C LD7 15V 15 2V tlR244 215 MODEL HP8l l2A f IGURE lfll 3 5 __ MAIN BOARD Al SCHEMATI C SERVICING THE TIMING AND SLOPE GENERATORS SERVICE 4 1 111 3 1 1 ...

Page 213: ...R D A Al1W7 DOWN B 11 ZV c TP8 2 RAMP CURRENT SOURCES lllV I DOWN REF 0391 11391 C313 R382 l 121 l lu 7 2 I DOWN lllV l 121 I UP RAMP 1 urv REF i N C RANGE SW I TCH I NG l us lt328 111 lt328 111 R312 C3IS ln 113211 lM r a _ Ill ...

Page 214: ...N IKR8T ON R3l l 13 3 R3ll II U3Ql1 It OPE C318 S ZllV 8 47u 3 sv 111V C321 1 R314 R31S 88 1 2 21K S ZllV 4 REFERENCE R321 i 211K 1 2VRD _ I l5V 11328 1 151 MODEL HP81 l2A F IGURE ll 3 8 SERVICE MAIN BOARD Al sa MATI C 5 SERVICING THE TIMING AND SLOPE GENERATORS 11 l 3 1 3 ...

Page 215: ...7 to position Pl 2 Disconnect Jumper A2Wl 3 Connect RES on A3 to ground for a short time to ensure the microprocessor is reset 4 Connect the signature analyser ground to the microprocessor board ground then set the signal analyser as follows Signal Analyzer Start r Stop r Clock Ground A3 µP Board Connections TP SA TP SP TP E Ground 5 Verify that the reading at the microprocessor board 5 V is 0003 ...

Page 216: ......

Page 217: ...coder Signatures UlOO Mnemonic Description Free run Area Pin S A 7 SRC Slope range decoder load signal 273U U300 ll 10 PIC Period input store select U859 U200 10 11 CLR Error feedback reset P54U U142 12 12 MAMO Mode decoder data load signal 8PHH UlOl 11 13 WIC Width input store select ClOF U240 10 14 DIC Delay input store select 3813 U220 10 Check the control mode selection signals from control la...

Page 218: ...peration of the Ext Input Circuit 1 Set up the HP 8112A as follows Mode Trig Trig Slope f Trig Level Pot Mid range 2 Apply a symetrical signal to the Ext Input 3 Check the input signal from the trigger input circuit at pin 7 of U200 against Figure 10 3 8 0 2 V 1 5 V J EXT PER J Figure 10 3 8 Period Generator Input pin 7 To check the operation of the Period Generator 1 Set the HP 8112A to RCL 0 2 C...

Page 219: ...utput signals 5 Check the period generator operation against Table 10 3 10 and Table 10 3 11 Table 10 3 10 Period Generator Operation U200 Pin Mnemonic Description State 5 PERC Period control voltage input L 2 ERP Period error output signal L 10 PIC Period input store select See Table 10 3 1 11 to 18 LD7 LDO Data to be latched into See Table 10 3 2 the input store of U200 R212 PVC Period vernier c...

Page 220: ...e period generator pin 7 of U220 against Figure 10 3 11 J 50 50 J J I 1 ms I II DEL 6 5 0us DEL 200us Figure 10 3 11 Delay Generator l P O P waveforms 3 Check the ramp signal at pin 20 of U220 against Figure 10 3 12 4 Check the signal being sent to the width generator IC240 at TP2 against Figure 10 3 11 1 490nsr 0 V i i _ I I I I I I 9V _ j DEL 650us Figure 10 3 12 Delay Generator ramp signal pin ...

Page 221: ...V Delay Vernier Current can be checked by measuring the voltage across R226 7 Set HP 8112A PER to 20 ms 8 Check the Delay Generator levels against Table 10 3 13 Table 10 3 13 Delay Generator Signal Levels DEL Setting Voltage across R226 1 ms 0 16 v 5 ms 0 003 v 9 99 ms 0 02 v 1 Set up the HP 8112A as follows RCL DEL DBL 0 650 µs OT 200 µs 2 Check the input signal from the delay generator at TP2 pi...

Page 222: ...rator operation against Table 10 3 14 and Table 10 3 15 Table 10 3 14 Width Generator Operation U240 Pin Mnemonic 5 WIDC 2 ERW 10 WIC 11 to 18 LD7 LDO R245 wvc Description State Width control voltage input L Width error output signal L Width input store select See Table 10 3 1 Data to be latched into See Table 10 3 2 the input store of U240 Width Vernier Current See Table 10 3 15 6 Verify that vol...

Page 223: ... press the key 2 Check the input signal from the width generator at pin 1 of U301 against Figure 10 3 16 3 Check the ramp current input at pins 9 and 12 of U301 against Figure 10 3 16 4 Check the signals being sent to the shaper IC waveforms at TPl TP4 and pin 21 of U301 against Figure 10 3 16 P i n s 9 1 2 P 1 n 1 TP 4 TP 5 l B V OV I l ms 1 150000 I 0 1 4 V 0 25V 0 1 4 V 0 j 0 39V I I I I I r100...

Page 224: ...s H L L H H H H L 4 5µs 99 9 µs H L L L H H H L 5 50 µs 999 µs H L L L L H H L 6 0 5 ms 9 99 ms H L L L L L H L 7 50 ms 99 9 ms H L L L L L L L Area U301 K300 Q311 Q312 Q313 Q314 Q315 U301 I 10 13 Only in Self Test H LEE and TRE must be in the same range See transition modes operating section 2 Should values of LEE and TRE be selected that overlay in an overlap region the microprocessor selects th...

Page 225: ...oder U500 latches data from the data bus when enabled by WS2 LRC sent by the microprocessor and outputs the data to the shaper IC where it is used to control pulse shaping correction and to select output mode and complement The data is also applied to the pre attenuator where it controls the attenuation and output disable functions via relays K500 to K504 Shaper IC The shaper IC U401 shown in Figu...

Page 226: ...ential current inputs INP or INP The single ended EECL voltage input 0 V to 0 6 V generates an output pulse with fast but fixed transition times Wave Forming In Linear transition mode the waveform block within the shaper IC acts as a linear amplifier upon the input from the slope generator See Chapter 10 3 In shaped Gaussian mode the linear slopes ofthe input pulses are given gaussian characterist...

Page 227: ...tput amplifier block is a differential output circuit whose reference currents are derived from the 6 2 V reference on the timing generator Current Mirror The differential output of the shaper IC requires a current mirror output stage which eliminates the effect of quiescent currents and doubles the available output signal The operating principle is illustrated in Figure 10 4 2 and depends on QlA ...

Page 228: ...range of output voltage required Table 10 4 2 Pre attenuator ranges Attenuation Active Relay s Final Output Range 0 dB K503 10 to 16 V 4 dB K502 1 to 9 99 V 24 dB K500 K501 0 1 to 0 99 V Signal Output Amplifier The output amplifier amplifies the signal received from the shaper IC via the pre attenuator and adds the required offset voltage as dictated by the HIL and 101 settings A simplified versio...

Page 229: ...ero difference The offset voltage control amplifier U502 detects any offset voltage at the main amplifier output vi_a the feedback network c x Rin c x Rrb and compensates for it via the main amplifier s non inverting input The required output offset is created by injecting the offset input signal from the offset vernier DAC and the HILC from the timing circuit into the summing point of the offset ...

Page 230: ...ed off allowing Q283 to switch on and provide an output voltage of 2 4 V into 50 n or 4 8 V into a high impedance Due to the inverting action of the trigger amplifier the inverted trigger input pulse is output as a positive going pulse synchronized to the output of the period generator In normal mode the TRIG OUT signal is a 503 duty cycle square wave at the same frequency as the main HP 8112A out...

Page 231: ...TOR 0dB 1111V 18V llC414 lip ll f i C419 0 EJ 0413 1 Sp 9 11 R4U Z UIK R412 178 C4ll 47n R431 lM CR412 C411 C EJ IR422 R414 I RSl7 RSll l47K 178K S UK l 49Ki31 I s RSll HIL LOL CONST Sii F IXED OVERSHOOT K K4 5V I 8 1V 9 99V RSl3 71 8 24dB RSl2 22 1 7 87 8 1V 8 99V MOOEL HP8112A f I GURE 1111 4 4 J MAIN BOARD Al SCHEMATIC 8 SERVICING THE SHAPER ANO OUTPUT AMPLirIER 10 4 7 ...

Page 232: ...S R4112 I BAL lllK LJ nxm BAL f _ Al W7 jl J4Cll LD8 LD7 WSz t t 20 3 0 0 3 10 20 3 0 MC14852 8 r S 2V 5V T21 r rHEN 11 1111 Cl lD v N O 74L8374N 11 2 lSV 5V BIAS ADJI R R438 JR424 4 141 lK lSV 1111423 l11114 l lK R437 18 ZK VENll ADJ J N C N C l 14 l13 111 15 11 11 f J rl U Tat liil N WAYE llP F llRMIND l ON U4111 23 WAYEFORM SHAPut 22 LOGIC 24 l 1 3 2 p R413 C4l2r lC4l3 lK SY I lu 15 2V I lu S 2...

Page 233: ...5V ill 81 81 l5V LEVEL CHECK SY l 1 Rl5l57 Rl5S7 Ul5l38 4 7K ZX4 7K 11 15 8 La 74Ul83N DDI1 8 481 11519 Z3V Rl54l5 TO FRONT 11 CRl513 Al 118 PANEL J4 Rl547 111 Kll84 1 11548 111 CRS14 11 Rl549 ITEl 8ZS 0513 Z3V Kll84 TR I GGER OUTPUT AMPL I F I ER lSV l5V RZ83 CZ8Z RZ8Z CZll l5V LZ8I Jl lu RZ8t l 47K Jl 47u llS CZll J l 0281 fil RZ8l5 237 787 s zv s zv RZ88 182 11282 RZ84 51 1 R287 1112 QZ83 RZ8I ...

Page 234: ... llp l 3p llEAD BIAll RS32 AD ls N C 7 SK M II CSl9 1 711 CRSlll ln 11518 RS2I RS22 R528 M 59 lK IK 881 21 CSU lln 15V C5l8 ln f 15V RSll RS2l 11523 11529 RSl9 59 lK IK 881 249 RS31 l 781 B ill CR5ll2 15V RSll llC532 7 SK 2 Zp CSl3 l lu u RSl2 lp 11 12 7K RSl3 B 1181 R5l4 RS28 849 OFFSET 2K IZV RSl5 VOLTAGE M 118 Siu a CONTROL l4 DROOP RS27 R5 C515 CRSll4 ll8 9 lu 11 C5l8 l 47u 23V 23V c ...

Page 235: ...the SET key 3 Use an oscilloscope to check the signals at pins 19 and 18 of U401 against Figure 10 4 6 Note that the signals on pins 18 and 19 are not necessarily symmetrical 0 26 V I I I PIN 1 g I I I I I I 0 1 4 V I I 1 00u s i 0 2 6 V I I I I I I I I P I N 1 8 I I I I 0 1 4 V I Figure 10 4 6 Shaper IC Input Signals on Pins 18 19 0 12J 0 4 V I 1 lms Figure 10 4 7 Shaper IC Output on Pin 12 4 Cha...

Page 236: ...k the output on TP6 against Figure 10 4 9 0 05V 0 05V 0 05V 0 05V L I NERR GRUSS Figure 10 4 9 Shaper IC Output LINEAR 8 Change the HP 8112A HIL to 0 99 V and transition mode to FIXED 9 Check the output on TP6 against Figure 10 4 10 Figure 10 4 10 Shaper IC Output FIXED HIL 0 99 V 10 4 12 Servicing the Shaper and Output Amplifier ...

Page 237: ...The voltage is measured at the board connector side of R422 Table 10 4 4 Amplitude vernier Control voltages HP 8112A Setting Control voltage HIL LOL at R422 typ 0 5 v 0 5 v 5 03 v 2 5 v 2 5 v 2 8 v 4 99 v 4 99 v lO mV Shaper IC reference current Iref can be checked by measuring the voltage across R411 The reading should be approximately 5 4 V which equates to Iref of 2 5 mA Check that the signal l...

Page 238: ...s securing the heatsink s 2 Remove the heatsink s 3 Remove the adaptor s from the transistor s to be replaced 4 Replace the transistor s 5 Re fit the adaptor s and heatsink s 1 Set up the HP 8112A as follows RCL 101 Output 2 Press the SET key 0 1 v Disabled 3 Measure the voltage at CR501 and CR502 typ 10 mV If it is fully negative approximately 15 V check U502 Q502 Q504 and Q506 If it is fully pos...

Page 239: ...heck the output amplifier input signal at TP4 Then do the following a Set up the HP 8112A as follows HI1 101 8 0 v 8 0 v b If the input signal is clean but the leading edge of the output signal is distorted check Q503 and Q505 c If the trailing edge is distorted check Q504 and Q506 Servicing the Shaper and Output Amplifier 10 4 15 ...

Page 240: ...10 4 16 Servicing the Shaper and Output Amplifier ...

Page 241: ... NON COtf Ot NT SIIE OF n BOFRD C141 nTTED I NIER IC Ulli B C415 FITTED I NIER CXlN CT lR J2 C245 C41 19 CS54 C336 R437 NOT FUfit S FITTED D MOIEL H B 1 12A R l 1 9 nG R ll l 4 1 1 tf IIN BOARD Al COl POt N1 LAYOUT SERVICING T1 5lff ER FNl OUT f UT FtA IFIER 10 4 17 ...

Page 242: ...A R l BD RY MR I N 1 2 7 I I IJt 51 CR1 B e i 1 _ _ _ _ 20 ...

Page 243: ... C3 1 5 C2 CR403 C2 R l 1 4 C3 1 6 B2 CR404 C2 0304 B2 R l 1 5 C3 1 8 C2 I CR501 D2 Q30S 82 R 1 16 MODEL HP8 1 1 2A GRID REF GRID REF GRID REF GRID REF GRID LOC DES LOC DES LOC DES LOC DES LOC 82 R l 1 7 B l R3 1 B C2 RS2B D2 U50 1 D2 82 R l l B B l R320 C2 R529 D2 U502 D2 82 R l 1 9 D2 R32 1 C2 R530 D2 U503 C l B2 R 1 26 B l R322 C2 RS3 1 D2 82 R 1 27 B l R32S B C2 R532 D VR A VR320 C2 B R 130 C ...

Page 244: ......

Page 245: ...y the microprocessor to produce the flashing error display when an error condition is detected The 555 timer is configured as an astable multivibrator which produces an output of approximately 100 Hz when enabled when TIRE is active low RESET is held high for a short time at instrument switch on to disable the timer so that NMI cannot be transmitted before the power supplies have settled If an err...

Page 246: ...e 10 5 1 Principle of DAC Operation The amplitude control DAC U23 operates on the principle summarised in Figure 10 5 1 The current Iin comes from a reference voltage and is repeatedly divided by two at each branch of the resistance network This process provides a series of binary current fractions which are switched to ground or the summing point X Each switch is operated by the data bit which ha...

Page 247: ... levels HI1 101 Refer to Figure 10 5 4 and Figure 10 5 1 Byte Latching U20 has no internal latches and since the DAC output must be available continuously and simultaneously with the amplitude DAC output external latches are provided See Figure 10 5 3 The low and high bytes of the offset value are loaded seperately from the latched data bus into latches U19 and Ul7 using the negative edges of 1BO ...

Page 248: ...outl fout2 fin The remaining DACs U4 U6 Ul2 Ul3 and U23 convert the digital vernier values input to the microprocessor from the instrument front panel or system controller into analogue signals for use by Timing ICs on Al Main Board which generate the required period delay and width delay signals Slope IC on Al Main Board which generates the leading and trailing edges of the output pulse Shaper IC...

Page 249: ...3 T I M I NG COMP H I GH BYTE BURST 5V LD1H 01 I2c1120 I _ _ ____ 5V T RE FROM A3 W4 M I CROP BD I3c II 3e 1 3J5 l DAC REFERENCE 4 Rl7 lK 1cl4 u L 1 1u 5V T I MER SERVI CE lYREF TP8 ...

Page 250: ...SUPPLY OIJ1 PUT I UI r l r _ r Tcz lSV 2 C33 5V l lu 7 ID4 llu J _03 ISV 7V s zv J cs I llu Rl ll I Rlll lK 215 1ll4 5YRED fil I 2c I 20 2 ADDRESS DECODER OUTPUT l LA4 Z sVo i T11 3 4 I 74Ull s N C ADDRESS DECODER T I M I NG 5V Cl i7uv LA3 l z 3 4 s I 7 1 1111 74Ull lllif N C LOW BYTE OFFSET LATCHE 5V 28 Cll 5Vo d lR Ull ll lu I Cl r tn 741 1127311 ll H I GH BYTE OFFSET LATCHE 5V T211 5V rt4_It Ul...

Page 251: ......

Page 252: ...FROM A3 W4 MI CROP BO JS S J5 1 __ 1 rllf lilT B O A R D LDA C ill l5V 1 1 111 irt 1 D 8I UI AD7S22 lllV Liii D 8I us ICUfl PER I O TPl TP3 LDl LD7 _ _ _ _ 01 0 1 1 9 _ _ _ _ Cl 15 LSB lllV U2I ICUfl W t l l CONV __ 3 J i __ _ _ _ _ ...

Page 253: ...V R43 111 51 R34 2 2K R44 2 281 SY llf f SET R32 ADJ 999ue 11111 R33 s zv 11151 lSV SY llf f SET R35 ADJ 999ue 11111 lV Ml I 3 Al 117 311 J 4 7 tf lDOWN _ _ _ _ 311 J4 8 1 SERVI CE TO A 1 W7 MA I N BOARD vc J411 t T t 1 MODEL HPB1 12A f I GURE 1111 5 5 CONTROL BO A2 SCHEMAT IC 3 SERV ICING THE CONTROL BO 1 111 5 9 ...

Page 254: ...All c LD9 19 AD7522 15V U13 TRE 5VREll IDUTZ AONO 27 LDTR e l RF112 RF 81 DONO AD7522 za UP CURRENT SOURCE R31 R29 1 271 7 51 1 IVREF 2 DOWN CURRENT SOURCE AMPL I TUDE CONTROL CZ7 15V R43 18 51 34 Z 2K R44 Z 281 SY orrsc R32 ADJ e 119 llA1N 11 s zv IV All L TP7 R48 2K GAIN 11 ...

Page 255: ...dress Decoders The address decoders can be checked using signature analysis 1 Set the microprocessor to free run mode as follows a Set the Pl wire on board A3 See Chapter 10 7 to position Pl b Disconnect Jumper A2Wl c Connect RES on A3 to ground for a short time to ensure the microprocessor is reset d Connect the signature analyser ground to the Control Board ground and connect the probes as follo...

Page 256: ...idth FP31 U6 24 LBD Low Byte Delay 509H U5 24 LPB Low Byte Period 79HU U4 24 Sub coded address 050H Ul U16 1 Sub coded address CH9U Ul Ul6 2 Sub coded address 8759 Ul Ul6 3 Sub coded address 55F4 Ul 4 5 Sub coded address 8U95 U16 4 5 LBA Low Byte Amplitude F2F2 U23 24 HBA High Byte Amplitude PlOH U23 25 LBO Low Byte Offset F491 U19 ll HBO High Byte Offset 27A6 U17 11 LBB Low Byte Burst 58F8 Ul00 1...

Page 257: ...nge 5 LEE TRE 50 µs 999 µs Slope range 6 LEE TRE 0 5 ms 9 99 ms Slope range 7 LEE TRE 5 ms 99 9 ms Area Period Control l Set the HP 8112A to RCL O Pin 2 Pin 5 Pin 6 PRO DRO WRO L H L H L H U3 3 U28 4 U3 4 Pin 12 Pin15 SCPO SCPl L L H L H L H L H L L H H H Ull 10 Ull 9 2 Check the Period DAC output according to the following table Table 10 5 3 Typical Period Control DAC Output HP 8112A PER Voltage ...

Page 258: ...cording to the following table Table 10 5 6 Typical Slope LEE Control DAC Output HP 8112A LEE Voltage at TP4 50 µs l 65 v 500 µs 0 16 v 999 µs 0 08 v 3 Set the HP 8112A LEE to 500µs 4 Check the Slope DAC trailing edge output according to the following table Table 10 5 7 Typical Slope TRE Control DAC Output HP 8112A TRE 50 µs 500 µs 999 µs Amplitude Control 1 Set up the HP 8112A as follows RCL 101 ...

Page 259: ...inst the following table Ifnecessary you can also check that the DAC is receiving the correct data from the offset latches Table 10 5 9 Offset DAC Output Voltages HP 8112 Setting Voltage HIL 8 00 v 5 62 v l 05 v 0 55 v 0 15 v 0 10 v 0 05 v 0 00 v 0 05 v 0 45 v 0 95 v 4 62 v 7 90 v LOL at TP6 7 90 v 7 45 v 4 62 v 4 80 v 0 95 v 0 94 v 0 45 v 0 47 v 0 05 v 0 09 v 0 00 v 0 05 v 0 05 v 10 mV 0 10 v 0 0...

Page 260: ...Timer 1 Set the HP 8112A as follows RCL PER Output 0 10 µs Enabled 2 Check the TIRE signal on U26 pin 4 is HIGH 3 Check U26 pin 3 for a 100 Hz signal 10 5 16 Servicing the Control Board ...

Page 261: ... RS9 A2 R60 C3 R6 1 C3 R62 R63 A3 R64 Al Al R101 C3 R102 C3 R103 R104 Bl R105 A2 A2 3 R106 A2 R107 A2 R108 R109 A2 Rl 10 A2 Rl l l MOIE l F8 1 12A GRID REF GRID LOC DES LOC A3 TPl A2 A3 TP2 A2 A2 TP3 A3 A3 TP4 Al A3 TP5 Al A3 TP6 A2 A3 TP7 A2 A3 TP8 A3 A3 TP9 B3 A3 TP10 Al A3 Ul B3 A3 U2 B2 Al U3 A2 Al U4 B2 Al us B3 Al U6 B2 Al U7 A2 Al 1 8 A3 Al U9 A2 Al U10 B3 Al U1 1 Al Al U12 Bl A2 U13 Bl A2 ...

Page 262: ...A B A2 ED RY CONTROL ...

Page 263: ... circuits The burst flip flop is located on the main board not on the control board Refer to Figure 10 6 2 Operation of the burst control circuit can be categorised as follows Burst number acceptors Counter 11 Blocking flip flop The burst number input from the front panel or system controller is loaded into latches UlOO and UlOl on receipt of LBB low byte burst and HBB high byte burst from the con...

Page 264: ...rol When counters Ul 1 1 and Ul12 have both cleared the TC output from them pin 12 gated by UllO sets the flip flop U109A The Q output disables counter Ulll and the Q output enables the wired or Burst On circuit via U107B In this configuration the BURST ON signal is active low only when all the the counter inputs are low signifying the burst is complete Counter reset For the counter to be re enabl...

Page 265: ...1471 N C J 14 s 2V i l8 l EB8135N S 2V AUTO LOAD FF _ _ _ 1 1 1 llURllT CLQCK l Rll5 471 5V s Rll7 1 54K 311 5 2V 2 N C R2l4 511 SERV ICE 21 Q r S 2V _ _ _ __ uum Ul 2 4 r Ir ii N C t U lllA __ 8 125N w S 11 EB8125N 7 BLOCK ING F F 5V Cll3 sV l I S 2V 5 2V __ Clll l lu p 1 8 i f I 8 l_ T l 1J Ul19 8 I Rll2 4 71 0 LOW BYTE UNTER 8 V i 1 _ _ 7_ _ _ g 1L N C 8 N C Rlll Clll N C _ __ _ N C 8 81 33p Ul...

Page 266: ...l l Cl Liii BN9 1n 1 l N C N C l N C N C 741 8273N ll S 2V E9S111N 11 rU7 Ii E81114N 1111 11 1111 1 1 1 1 1 1 R114 111 U1113D nT I µ 5V IX471 s zv m1l4H l 1 T R112 Rlll 2X4 7K ZXl IK 5 U117A 23 14 3 Ul5D z 2 r 9 8 111 ms183N R113 l Rl 2X11K 7X471 741 14N 1 l 1 s zv s zv N C 1u UllllC SV E9S125N _ 4_ Bl CTRDIV11 l 5V o 112 001110 2 CT l ZIJ2 1_ M3 1P 3 CT lS ZI U1llll 1 2 11 3 12 M u l u111 1 r 741...

Page 267: ... RES on A3 to ground for a short time to ensure the microprocessor is reset d Connect the signature analyser ground to the Control Board ground and connect the probes as follows Sig Analyser Start f Stop Clock A3 µP Board Connections TP SA TP SP TP E e Verify that the reading at the Microprocessor 5 V is 0003 If it is not then the microprocessor is not free running f Check the signatures of U16 ag...

Page 268: ...nd check that error number E52 is displayed 6 Press LCL 7 Press the MAN button 8 Check the TTL logic levels at the burst acceptors UlOO and UlOl as follows Table 10 6 2 Signal Pin Level BNl UlOO Pin 2 L BN2 UlOO Pin 5 L BN3 UlOO Pin 6 L BN4 UlOO Pin 9 L BN5 UlOO Pin 12 L BN6 UlOO Pin 15 L BN7 UlOO Pin 16 L BN8 UlOO Pin 19 L BN9 UlOl Pin 2 L BNlO UlOl Pin 5 L BNll UlOl Pin 6 H 9 Using an oscillosco...

Page 269: ...CK WITH ECL PROBE I I 12l 2ms U l l2l5 l 4 ECL J L l u s U l l2l6 2 ECL us U I I l 4 TTL I CHECK WITH TTL PROBE I 0 2ms UI I l 1 4 TTL J L 2us U l l l 1 2 TTL _ll 20us UI I l 1 3 TTL 50us U I 1 2 1 2 TTL _ll n 12l 2ms U I 1 0 6 TTL I CHECK WITH TTL PROBE I 0 2ms Figure 10 6 3 Burst counter waveforms and timing Servicing the Burst Control Circuit 10 6 7 ...

Page 270: ......

Page 271: ... the microprocessor If the local lockout command has been received on the HP IB then the LCL key is also ignored Ke yb o a r d Keyboard Scanner O at a Bu s D i s p l ay Bo a r d Co n t r o l Bo a r d Figure 1o 7 1 Microprocessor board architecture Figure 10 7 1 summarises the parts of the microprocessor board and the connecting busses The purpose of the address bus is to allow the microprocessor t...

Page 272: ...instrument is switched off Refer to Figure 10 7 5 Normally U27A output is low U27B output is therefore positive and the RAM SELECT output from U15C can enable the RAM by switching on U29C When the Power Down Detect signal goes high U27A output goes low U27B output goes low and U15C cannot switch on U29C Therefore the RAM becomes or remains disabled When the instrument is operating U27C output is h...

Page 273: ...O l J FI GRfl IT 39 RS2 a 38 RS ASE 37 RS0 R 1r 36 IE0 35 IBT ll0 3 192 DI 33 183 D2 32 184 D3 10 3 1 BS D4 L L 30 1 86 D5 12 29 IB7 Il6 13 28 T Rl 27 T 26 RTN 25 EOi 24 TRIG 23 SRO 22 REN 2 I IFC Figure 10 7 2 GPIA IC pins HP IB Interface Signals IB0 187 Eight HP IB data lines DAC When valid data is received the GPIA switches DAC high to indicate that the data has been accepted RFD The GPIA switc...

Page 274: ...er 2 U14 Sub decoder 1 If sub decoder 1 U13 is enabled by the main decoder it uses microprocessor address lines A8 A9 and AlO to enable one of the following RAM UlO Keyboard Scanner U19 GPIA U30 Sub decoder 2 If sub decoder 2 U14 is enabled by the main decoder it uses microprocessor address lines AO Al and A2 to enable one of the following Latched Data Bus Latch U16 Control Board Addressing via Ul...

Page 275: ...rizontal signal paths of the key matrix KSO KS7 form the inputs to the multiplexer U19 which is controlled by address lines AO Al and A2 The output from U19 therefore represents the state of the key joining the vertical signal path addressed by A3 A5 and the horizontal signal path addressed by AO A2 Each time the microprocessor increments the address to U20 it cycles the address to Ul9 through all...

Page 276: ... approximately 2 5 ms This allows the power supplies to become established before the microprocessor starts running This delay is achieved using the CR network R12 3 x lOK and C4 0 1 µF U27D output goes high when C4 has charged to approximately 420 mV and the RESET signal is withdrawn When the instrument is switched off the Power Down Detected signal goes high forcing the output of U27A high This ...

Page 277: ... 74LS12N F i v Ul DB 33 Dl D2 D3 LT D4 D5 DB D7 t ADD RESS BUS DR I V R A8 A 1 5 EN U4A IA Al AB 17 2 18 _ Ill_ IR G Al A9 A AZ All 8 2 Al l A3 All A4 Al2 AS Al3 lbEN U48 A8 Al4 A7 AlS 9 Al2 I I llC8al2 l 21 7 Al 17 r SA ADDRESS BUS DR I VER A0 A7 ts r1 1EN U3A 4 74LS244N EN lfJB t I Al A A4 7 II aa I 11 74LS244N SP RN 3 ENZUBl DB 2 I 2 V I 18 I l _ I 744 S245N ll RlB 4X11K 07 n D8 8 1 D5 I rw 111...

Page 278: ...lJ2 11 11 M 05 I I n7 U35D 9 74LS14N u U31 q 1 Al 7 Le A2 11 9 Le 12rl Cl 15 u C2F u DI 02 2 I A bl 2 11 t 13 2 I D 1 1 14 f sV C32 tu U32 q 1 Al u A2 7 u II II 12f I Cl 1 Lt C2n u DI 02 r 1 2 Cl u I I u l l 2 II lB 14 MC34 48AL f U35E 11 u 74LS14N sV C33 l lu U33 q 1 Al u 7 A2 sV u II 9 12F Cl Le C2r Le DI 02 3 A I R Cl R 7 Cl r h 2 I D l I l sV C34 l lu sV U34 q T p v t 7 9 15 Al u A2 Le II 12F ...

Page 279: ...if it iiDIT 11 AV H I I AV H iar I A 327i7 H lr iii I AV 1 l r ISi I AV I AV _ ___ _ __ _ VPP SV EPROM SV SY i 4 r R21 Cill _ __ _ 1__r a _ o 5Vf L fil 3 Rll 14 3 3K 3 5V SERV I CE 01 RAM POWER SUPPLY RAM BATTERY SUPPLY Dl Rll 14 lK 3 A Z4 U39C N C N C N c 74LS81N MODEL HP81 12A R24 2K _ an T3V f I GURE UJ 7 5 1 M ICROPROCESSOR BO A3 SCHEMAT I C 2 SERV ICING THE MI CROPROCESSOR AND F RONT PANEL UI...

Page 280: ...6 C W 11 LI Rll Rll 14 I K l I K 5 1 8 9 Rll 3 31 SUB DECODER All A l 4 I l z 3 4 5 I 7 h ADDRESS BUS x 11 __ __ __ __ __ __ __ __ __ DATA BUS 1 4 Rl5 4XllK Cl _ 32K X8 q Rl5 l llK ll Al AlZ MA I N DECODER 1r o p l IL li l 4 A I 2 N C 3 N C 4 N C 5 N C 8 N C L J 7u N C 8 74LS138N 11411 AV AV I AV A 32787 AV EPROM AV AV AV AV ...

Page 281: ... 74LS374N 8 8Xll8 3 J 4 v _2 I R Ll LOS I R8 I I 385 5 LZ n4 2 5 L 1111 L I KEY BOARD D I SPLAY LATCH 117 KEY SCANNER BUS D I SPLAY SY 5V DR I VER RZ l Cl 19 47u 9 l IJE y lit l r 28 SEGO 2 EOf U22 SEGE EDD 8DlC SEQ8 r EGA 4 Lill 12 D P IDI DIDI IDl 0107 102 0108 103 DIGS 104 DllM IDS 0103 l ID DIQ2 T ue PIJftl ICM72l8A 28 __ __ iwl auco SY 0 0 LD2 MODEL HPB1 12A Jl 28 Jl 25 Jl 24 Jl 23 JlC22 Jl 2...

Page 282: ... D r 71 h ADDRESS BUS P O A l MA I N BOARD DECODER CONTROL bC27 InEN UZlA i lu l 1 J 17 tR A3 W4 JSUI LA4 J2U8 4 i _ 4 lo a 1 isu7 12un ti E8 il l JSU4 IE q Bi t I J2U4 JS 21 IE I J2 21 1 JSUI RESET JSUI lmn I I I I I BUS DR I VER 74LS273N IF ta LAtM 1 i LJ 7 DI 3 D7 4 R 741 53 DE ...

Page 283: ...7 JZCI JZ S JZ 4 JZ I JZ ll 1 JZUI t _ 11 JZCZI _ JZ 3 JZ Z E J JZU IE VERN I ER KEYS LD7 DSZ7 1 1 1 1 l DlG7 N C N C N C tJIL 1 t Jt t t ilij fo obA ii I 0d 0oA1 1 _ _ ___ dp a c i P 4 1 u tf j fo oA 9 1 c b t 4 l 4 __ __ _ iLll __ l _ _ _ JI et 0oA1 1 CIS dp a c i J 1f f Jl J t itt l fo obA C _ _ _ _ _ _ _ _ _ ___ __ 1 11 J j c t i Oc OoAl J 11 1E1 r MODEL HP81 12A rIGURE U1 7 7 KEYBOARD A4 AND ...

Page 284: ..._o_ WIDC KS2 HILCr83 r sso r 1 KS2 BUR ET PER _o_ _o_ o _ o _ rS4 r ss r s14 rS28 ICS3 DBL o _ WI _o_ r _o_ DEL rss r s11 r 111 ICS4 DTY lPILS COIA WID o _ o _ o _ _o_ r r u rBl r sz1 ii DllAILE _o_ KS8 rszz KS8 LIMIT o _ KS7 r S23 KS7 KEY LEDS DISABLE BUR _ PER l Dll l DS8 D I I D LIMIT f DSZ DBLDEI t Dl9 r II DS15 I I I CDM L t DS3 II DllS a I J D U L f Dlll I t Dl4 HIL Dill I J n DIS Tll l os12...

Page 285: ...he cable to the Control Board to force NMI high 3 Reset the microprocessor by shorting TP RES to ground the pin beside TP RES for a short time When you have finished testing return the jumper on J4 to its normal position and reconnect W4 The address bus drivers and decoders can be checked using signature analysis 1 Set the microprocessor to free run as described in Free Running Signature Analysis ...

Page 286: ... 8759 17 18 uuuu 7791 8UP9 9UP1 CH9U ROM The ROM can be checked using signature analysis 1 Set the microprocessor to free run as described in Free Running Signature Analysis and connect the signature analyzer probes as given in Table 10 7 4 Table 10 7 4 Signature Analyzer Probe connections for ROM Test Probe Trigger Connect to Start See Table 10 7 5 Stop f See Table 10 7 5 Clock TP E Ground Ground...

Page 287: ...witch it off and disconnect the RAM back up battery by removing W2 jumper for at least 30 seconds This will destroy the stored RAM data Re connect the RAM back up battery and switch the instrument on The Standard Parameter Set is now loaded into the RAM Keyboard The keyboard can be checked using signature analysis 1 Set the microprocessor to free run as described in Free Running Signature Analysis...

Page 288: ... LIMIT COMPL DISABLE Vernier MSD UP Vernier MSD DOWN Vernier middle UP Vernier middle DOWN Vernier LSD UP Vernier LSD DOWN RANGE UP RANGE DOWN 10 7 18 Servicing the Microprocessor and Front panel TP7 Signature 0003 9HP6 P28A U8Al 3P2C OU89 83Pl 20UC 7CUC 5PUH F980 3263 99HH 2674 899P A264 95PF P578 795H P325 8F5C PUPO UP31 CU8U OP5P 973F 8394 P5H4 60P6 3976 983A 260H ...

Page 289: ...R 1 4 A3 C l B l R l S Bl C l B B l R 1 6 B l C 1 9 B l R l C3 C20 B l R l 9 B l t i C2 1 A2 R20 B l C22 A2 R2 1 A l C23 B3 R22 C2 C24 A2 R24 C3 C2S A2 R2S C2 fil C26 A3 R26 C3 t J C27 83 R27 C2 C28 83 C29 83 Ul 82 C30 C2 U2 82 U3 82 C3 1 C l U4 B2 C32 C l U 1 0 B l C33 C l U 1 2 B l C34 Cl C3S Al U13 B2 C37 A3 U 1 4 82 U l S B l J3 BT l U 1 6 A2 CR l B2 MP l CR2 82 U 1 7 83 CR3 C3 U l B 83 CR4 C3...

Page 290: ...R B c R3 BD RY M I CROPROCESSOR 1 2 3 FIGURE 1 0 7 8 ...

Page 291: ...56 82 57 A2 SB A2 59 A2 510 A2 51 1 R2 512 82 513 82 514 82 515 82 516 82 517 C2 REF GRID REF GRID DES LOC DES LOC c DSl Bl DS2 0 Al 052 Bl 052 1 Al DS3 Bl 0522 Bl DS4 Cl 0523 Al DS5 Al 0524 Al DS6 Al 0525 Al DS7 Bl 0526 Bl DS8 Bl 0527 Bl DS9 Bl 0528 Bl DS10 Bl 0529 Bl DSl l Cl Jl Cl DS12 Al J2 Al DS13 Al 51 Cl DS14 Al DS15 Al 52 Cl 53 Cl DS16 Al 54 Cl DS17 Al DS18 Al DS19 Al FI GURE 1 0 7 9 KEYBO...

Page 292: ...r 1_ __ R RS ED RY D I SPLAY 20 J2 iJ 0DS13 QDS17 QDS23 QDS14 QDSlB 0DS24 0DS15 0DS19 0DS25 0DS16 QDS12 0DS20 B J _ _ _ _ _ W l 40 1 I 4 _ _J B D0EJ S28 Og DS2t l DD DODS2 ODSS 0DS7 0DS9 I DS22 I 0DS6 ODSB 0DS10 QDSl l QDS4 ...

Page 293: ...the Hewlett Packard part number and check digit together with the quantity required and send the order to the nearest Hewlett Packard office A list of Sales Service offices is given in Appendix D If you require a part which is not listed in one of the parts lists then quote the instrument model number serial number and the function description of the part Within the USA you can use the Hewlett Pac...

Page 294: ... 8 X2l 2 X2 Figure A 1 Mechanical Parts 1 A 2 Replaceable Parts ...

Page 295: ...MP MP3 MP MP2 MP4 MPS MP 1 2 MPS MP MP I B ElElElEl Replaceable Parts A 3 ...

Page 296: ...TTELFUSE INC 02037 MOTOROLA INC 04726 3M C O 02062 HP DIV 05 MSD 04775 NATIONAL LOCK WASHER C O 02121 LYN TRON INC 04805 ILLINOIS TOOL WORKS INC SHAKEPROOF 02123 EG G INC 04821 TILLEY MFG CO 02137 CHAMPLAIN CABLE CORP DIV HERCULES 04822 STACKPOLE CARBON C O 02180 PRECISION MONOLITH CS INC 04880 ZIERICK MFG C O 02367 CORNELL DUBIL ER SANGAMO 05131 ELECTRONIC DEVICES INC 02414 BURNDY CORP 05176 AMER...

Page 297: ...e Name Reference Name 08709 PANASONIC INDUSTRIAL C O 08839 CO MATEL 10358 VOGT AG 09442 REAL PACK 11039 PAPST MECHATRONIC CORP 09538 TUSONIX 12482 BRADFORD ELECTRONICS INC 09939 MURATA ERIE NORTH AMERICA INC 28480 HEWLETT PACKARD COMPANY Replaceable Parts A 5 ...

Page 298: ...039 612 0160 4323 8 1 CAP 0 047uF 0 V 11892 PME271M547M 2110 0043 8 1 FUSE 1 5A 250V 04703 312 01 5 1250 0083 1 1 CONN RF BNC 05879 31 221 1020 1250 0083 1 1 CONN RF BNC 05879 31 221 1020 1250 0083 1 1 CONN RF BNC 05879 31 221 1020 1250 0083 1 1 CONN RF BNC 05879 31 221 1020 5041 0531 5 1 28480 5041 0531 5040 9317 1 1 28480 5040 9317 4040 1971 6 1 LABEL INFO 05584 08112 00204 3 1 28480 08112 00204...

Page 299: ...P42 2950 0043 8 1 NUT HEX DBL CHAM 04605 28200 10 101 AO MP50 08116 60101 9 1 CHASSIS 28480 08116 60101 AO MP51 08116 01203 8 1 BRACKET XFMR 28480 08116 01203 AO MP52 08116 01201 6 1 BRACKET XFMR 28480 08116 01201 AO MP54 0624 0413 3 1 SCR TPG 8 16 05610 224 41390 382 AO MP55 08116 04123 7 1 COVER 28480 08116 04123 AO MP56 0363 0125 7 2 RFI STRP FINGERS 03647 97 555 AO MP57 6960 0001 7 2 HOLE PLUG...

Page 300: ...0 2962 9 1 CAP 220uF 10 V 00493 SL10VB221TlOX16 Al Cl4 0160 2055 9 1 CAP O OluF 100 V 09538 805 504 Y5V 103Z Al Cl5 0160 2055 9 1 CAP O OluF 100 V 09538 805 504 Y5V 103Z Al Cl6 0160 2055 9 1 CAP O OluF 100 V 09538 805 504 Y5V 103Z Al C17 0160 2055 9 1 CAP O OluF 100 V 09538 805 504 Y5V 103Z Al Cl8 0160 6596 1 1 CAP 0 47uF 50 V 02010 SA305E474MAAH Al Cl9 0160 6596 1 1 CAP 0 47uF 50 V 02010 SA305E47...

Page 301: ...0 SR205C473MAAH Al C205 0160 0575 4 1 CAP 0 047uF 50 V 02010 SR205C473MAAH Al C220 0160 4521 8 CAP 12pF 200 V 06352 FD12COG2Dl20J Al C221 0160 5746 1 1 CAP O luF 50 V 06121 B37987 T5104 Mll Al C222 0160 5746 1 1 CAP O luF 50 V 06121 B37987 T5104 Mll Al C224 0160 0575 4 1 CAP 0 047uF 50 V 02010 SR205C473MAAH Al C225 0160 0575 4 1 CAP 0 047uF 50 V 02010 SR205C473MAAH Al C240 0160 4385 2 CAP 15pF 200...

Page 302: ...00V Al C316 0160 4385 2 1 CAP 15pF 200 V 09939 RPE121 105COG150J200V Al C318 0160 5746 1 1 CAP O luF 50 V 06121 B37987 T5104 Mll Al C320 0160 5746 1 1 CAP O luF 50 V 06121 B37987 T5104 Mll Al C321 0160 3879 7 1 CAP O OluF 100 V 02010 SR201Cl03MAAH Al C322 0160 3879 7 1 CAP O OluF 100 V 02010 SR201Cl03MAAH Al C400 0160 0575 4 1 CAP 0 047uF 50 V 02010 SR205C473MAAH Al C401 0160 3879 7 1 CAP O OluF 1...

Page 303: ...V 06121 B37987 T5104 Mll Al C517 0160 5746 1 1 CAP O luF 50 V 06121 B37987 T5104 Mll Al C518 0160 5746 1 1 CAP O luF 50 V 06121 B37987 T5104 Mll Al C519 0160 6596 1 1 CAP 0 47uF 50 V 02010 SA305E474MAAH Al C520 0160 6596 1 1 CAP 0 47uF 50 V 02010 SA305E474MAAH Al C521 0160 6596 1 1 CAP 0 47uF 50 V 02010 SA305E474MAAH Al C522 0160 6596 1 1 CAP 0 47uF 50 V 02010 SA305E474MAAH Al C523 0180 0582 5 1 C...

Page 304: ...Y SM 02062 50825511 Al CR141 1901 0535 9 1 DIO SCHOTTKY SM 02062 50825511 Al CR142 1901 0535 9 1 DIO SCHOTTKY SM 02062 50825511 Al CR143 1901 0535 9 1 DIO SCHOTTKY SM 02062 50825511 Al CR200 1901 1068 5 1 DIO SCHOTTKY SM 02062 5082 5541 Al CR201 1901 1068 5 1 DIO SCHOTTKY SM 02062 5082 5541 Al CR220 1901 1068 5 1 DIO SCHOTTKY SM 02062 5082 5541 Al CR221 1901 1068 5 1 DIO SCHOTTKY SM 02062 5082 554...

Page 305: ... SKT IC DIP 02414 DILB24P 308T Al KlOO 0490 1412 9 1 R1Y REED lA 11263 3570 1332 053 Al K300 0490 1412 9 1 R1Y REED lA 11263 3570 1332 053 Al K500 0490 1412 9 1 R1Y REED lA 11263 3570 1332 053 Al K501 0490 1412 9 1 R1Y REED lA 11263 3570 1332 053 Al K502 0490 1412 9 1 R1Y REED lA 11263 3570 1332 053 Al K503 0490 1412 9 1 R1Y REED lA 11263 3570 1332 053 Al K504 0490 1412 9 1 R1Y REED lA 11263 3570 ...

Page 306: ... HEAT SINK 02123 260 4TH5B SPECIAL THREAD Al MP508 1205 0662 7 1 HEAT SINK 02123 260 4TH5B SPECIAL THREAD Al MP509 1205 0662 7 1 HEAT SINK 02123 260 4TH5B SPECIAL THREAD Al MP510 1205 0662 7 1 HEAT SINK 02123 260 4TH5B SPECIAL THREAD Al MP511 1205 0662 7 1 HEAT SINK 02123 260 4TH5B SPECIAL THREAD Al MP512 1205 0662 7 1 HEAT SINK 02123 260 4TH5B SPECIAL THREAD Al MP513 1205 0662 7 1 HEAT SINK 02123...

Page 307: ... 2N3904 Al Q306 1854 1028 6 1 XSTR NPN SI 02037 2N3904 Al Q307 1854 1028 6 1 XSTR NPN SI 02037 2N3904 Al Q308 1854 1028 6 1 XSTR NPN SI 02037 2N3904 Al Q309 1854 1028 6 1 XSTR NPN SI 02037 2N3904 Al Q310 1853 0563 0 1 XSTR PNP SI 02037 2N3906 SEL Al Q311 1853 0569 6 1 XSTR PNP SI 02037 Al Q312 1853 0569 6 1 XSTR PNP SI 02037 Al Q313 1853 0569 6 1 XSTR PNP SI 02037 Al Q314 1853 0569 6 1 XSTR PNP SI...

Page 308: ... XSTR PNP SI 02037 2N3906 SEL Al Q518 1854 1028 6 1 XSTR NPN SI 02037 2N3904 Al Q519 1854 1028 6 1 XSTR NPN SI 02037 2N3904 Al Rl 0764 0013 5 1 RES 56 5 2W MO 02499 GS 3 Al R2 0812 0111 7 1 RES 05 3 3W 05524 RS 2B Al R3 0698 4508 0 1 RES 78 7K 1 05524 CMF 55 1 Al R4 0698 0085 0 1 RES 2 61K 1 05524 CMF 55 1 Al R5 0812 0045 6 1 RES 15 5 3W 05524 CW 2B 39 Al R6 0757 0460 1 1 RES 61 9K 1 05524 CMF 55 ...

Page 309: ...28 1810 0037 3 1 NETWORK RES DIP 02483 761 3 RlK Al R30 0698 3445 2 1 RES 348 1 125W 05524 CMF 55 1 Al RlOO 1810 0205 7 1 NETWORK RES SIP 02483 750 81 Al RlOl 1810 0206 8 1 NETWORK RES SIP 02483 750 81 Al Rl02 0757 0430 5 1 RES 2 21K 1 05524 CMF 55 1 Al R103 0757 0430 5 1 RES 2 21K 1 05524 CMF 55 1 Al RllO 0698 4485 2 1 RES 23 2K 1 05524 CMF 55 1 Al Rlll 0757 0446 3 1 RES 15K 1 125W 05524 CMF 55 1...

Page 310: ...1 9K 1 05524 CMF 55 1 Al R202 0698 7205 0 1 RES 51 1 1 05W 05524 CMF 50 2 Al R203 0757 0401 0 1 RES 100 1 125W 05524 CMF 55 1 Al R204 0757 0416 7 1 RES 511 1 125W 05524 CMF 55 1 Al R205 0757 0394 0 1 RES 51 1 1 05524 CMF 55 1 Al R206 0698 6324 2 1 RES 187 1 125W 05524 CMF 55 1 Al R207 0757 0410 1 1 RES 301 1 125W 05524 CMF 55 1 Al R208 0698 3700 2 1 RES 715 1 125W 05524 CMF 55 1 Al R209 0757 0403 ...

Page 311: ... 3160 8 1 RES 31 6K 1 05524 CMF 55 1 0698 3442 9 1 RES 237 1 125W 05524 CMF 55 1 0698 4404 5 1 RES 105 1 125W 05524 CMF 55 1 0757 1094 9 1 RES l 47K 1 05524 CMF 55 1 0698 4460 3 1 RES 649 1 125W 05524 CMF 55 1 0757 0394 0 1 RES 51 1 1 05524 CMF 55 1 0698 4014 3 1 RES 787 1 125W 05524 CMF 55 1 0757 0803 6 1 RES 182 1 5W 05524 CMF 65 2 0757 0803 6 1 RES 182 1 5W 05524 CMF 65 2 0757 0394 0 1 RES 51 1...

Page 312: ...524 0698 3152 8 1 RES 3 48K 1 05524 0698 4073 4 1 RES lM 10 125W 01607 0698 4073 4 1 RES lM 10 125W 01607 0698 4073 4 1 RES lM 10 125W 01607 0698 4073 4 1 RES lM 10 125W 01607 0698 4073 4 1 RES lM 10 125W 01607 0698 3540 8 RES 15 4K 1 05524 0757 0458 7 1 RES 51 lK 1 05524 2100 3097 7 1 RES TRMR lOOK 04568 2100 3097 7 1 RES TRMR lOOK 04568 0757 0409 8 1 RES 274 1 125W 05524 0757 0428 1 1 RES l 62K ...

Page 313: ...698 4467 0 RES l 05K 1 05524 CMF 55 1 Al R429 0698 7202 7 1 RES 38 3 1 05W 05524 CMF 50 2 Al R430 0698 7226 5 1 RES 383 1 05W 05524 CMF 50 2 Al R431 0698 8827 4 1 RES lM 1 125W 05524 CMF 55 1 Al R432 0698 7288 9 1 RES 147K 1 05W 05524 CMF 50 2 Al R433 0698 7283 4 1 RES 90 9K 1 05524 CMF 50 2 Al R434 0757 0290 5 1 RES 6 19K 1 05524 CMF 55 1 Al R435 0757 0476 9 1 RES 301K 1 05524 CMF 55 1 Al R436 06...

Page 314: ...9 1 125W 05524 CMF 55 1 Al R519 0698 4386 2 1 RES 59 1 125W 05524 CMF 55 1 Al R520 0757 0280 3 1 RES lK 1 125W 05524 CMF 55 1 Al R521 0757 0280 3 1 RES lK 1 125W 05524 CMF 55 1 Al R522 0757 0280 3 1 RES lK 1 125W 05524 CMF 55 1 Al R523 0757 0280 3 1 RES lK 1 125W 05524 CMF 55 1 Al R524 0757 0401 0 1 RES 100 1 125W 05524 CMF 55 1 Al R525 0757 0283 6 1 RES 2K 1 125W 05524 CMF 55 1 Al R526 0757 0283 ...

Page 315: ...25 3 1 RES 101 2 3W MO 12482 FP 3 Al R549 0757 0818 3 1 RES 825 1 5W 05524 CMF 65 2 Al R550 0757 0442 9 1 RES lOK 1 125W 05524 CMF 55 1 Al R551 0757 0442 9 1 RES lOK 1 125W 05524 CMF 55 1 Al R552 0757 0346 2 1 RES 10 1 125W 05524 CMF 55 1 Al R553 0757 0346 2 1 RES 10 1 125W 05524 CMF 55 1 Al R554 0757 0460 1 1 RES 61 9K 1 05524 CMF 55 1 Al R555 0757 0442 9 1 RES lOK 1 125W 05524 CMF 55 1 Al R556 0...

Page 316: ...1216 3 1 IC SN74LS138N 01698 SN74LS138N Al UlOl 1820 1997 7 1 IC SN74LS374N 03406 DM74LS374N Al Ul02 1826 0501 9 1 ANLG MUXR 02037 MC14053BCP Al UllO 1826 0111 7 1 IC 1458 03799 CA1458T Al Ul30 1820 1546 2 1 ANLG MUXR 02037 MC14052BCL Al Ul31 1826 0476 7 1 ANLG SW TL601CP 01698 TL601CP Al Ul32 1826 0111 7 1 IC 1458 03799 CA1458T Al Ul40 1820 1112 8 1 IC SN74LS74AN 01698 SN74LS74AN Al Ul41 1820 111...

Page 317: ...27 Al VR320 1902 0680 7 1 DIO ZNR 1N827 02037 1N827 Al VR501 1902 0960 6 1 DIO ZNR 12V 5 02037 SZ30035 18RL Al VR502 1902 0960 6 1 DIO ZNR 12V 5 02037 SZ30035 18RL Al W2 8159 0005 0 1 RES 0 CWM 01339 L 2007 1 Al W3 8159 0005 0 1 RES 0 CWM 01339 L 2007 1 Al W4 8159 0005 0 1 RES 0 CWM 01339 L 2007 1 Al W5 8159 0005 0 1 RES 0 CWM 01339 L 2007 1 Al W8 08116 61605 0 1 28480 08116 61605 Al W9 08116 6160...

Page 318: ...010 SR201C103MAAH A2 C17 0180 4129 4 1 CAP luF 35 V 04200 173D105X9035V A2 C20 0160 3879 7 1 CAP O OluF 100 V 02010 SR201C103MAAH A2 C21 0160 3879 7 1 CAP O OluF 100 V 02010 SR201Cl03MAAH A2 C24 0180 0376 5 1 CAP 0 47uF 35 V 04200 150D474X9035A2 DYS A2 C25 0160 3879 7 1 CAP O OluF 100 V 02010 SR201C103MAAH A2 C26 0160 3718 3 1 CAP 0 047uF 250 05992 23547350 A2 C27 0160 3879 7 1 CAP O OluF 100 V 02...

Page 319: ...02062 50825511 A2 CR6 1901 0535 9 1 DIO SCHOTTKY SM 02062 50825511 A2 CR7 1901 0535 9 1 DIO SCHOTTKY SM 02062 5082551 1 A2 CR8 1901 0535 9 1 DIO SCHOTTKY SM 02062 5082551 1 A2 J4 1251 31 19 2 1 CONN POST TP HDR 04726 3428 2002 A2 J5 1251 3119 2 1 CONN POST TP HDR 04726 3428 2002 A2 LlOO 9170 0029 3 1 CORE SHLD BEAD 04822 57 3452 A2 Pl 1258 0124 7 1 SHUNT PROGRAMMAB 05518 8136 475Gl A2 Ql 1853 0569...

Page 320: ...1 RES 8 06K 1 05524 CCF 55 1 T 1 A2 R21 0698 4428 3 1 RES l 69K 1 05524 CCF 55 1 T 1 A2 R22 0698 4428 3 1 RES l 69K 1 05524 CCF 55 1 T 1 A2 R23 0757 1094 9 1 RES l 47K 1 05524 CCF 55 1 T 1 A2 R24 0757 1094 9 1 RES l 47K 1 05524 CCF 55 1 T 1 A2 R26 2100 3252 6 1 RES TRMR 5K 10 03744 3386P Y46 502 A2 R27 2100 0554 5 1 RES TRMR 500 10 03744 3386P Y46 501 A2 R28 2100 0554 5 1 RES TRMR 500 10 03744 338...

Page 321: ...S 187 1 125W 05524 CCF 55 1 T 1 A2 R52 0698 3444 1 1 RES 316 1 125W 05524 CCF 55 1 T 1 A2 R53 0698 3153 9 1 RES 3 83K 1 05524 CCF 55 1 T 1 A2 R55 0698 3153 9 1 RES 3 83K 1 05524 CCF 55 1 T 1 A2 R56 0757 0462 3 1 RES 75K 1 125W 05524 CCF 55 1 T 1 A2 R57 2100 3214 0 1 RES TRMR lOOK 03744 3386P Y46 104 A2 R58 0757 0462 3 1 RES 75K 1 125W 05524 CCF 55 1 T 1 A2 R59 2100 3214 0 1 RES TRMR lOOK 03744 338...

Page 322: ...O 10358 1095D A2 TP7 0360 2264 6 1 TERMINAL TEST PO 10358 1095D A2 TP8 0360 2264 6 1 TERMINAL TEST PO 10358 1095D A2 TP9 0360 2264 6 1 TERMINAL TEST PO 10358 1095D A2 TPlO 0360 2264 6 1 TERMINAL TEST PO 10358 1095D A2 TP1 1 0360 2264 6 1 TERMINAL TEST PO 10358 1095D A2 TP12 0360 2264 6 1 TERMINAL TEST PO 10358 1095D A2 TP13 0360 2264 6 1 TERMINAL TEST PO 10358 1095D A2 Ul 1820 1216 3 1 IC SN74LS13...

Page 323: ... IC 072A 01698 TL072ACP A2 U25 1820 1546 2 1 ANLG MUXR 02037 MC14052BCL A2 U26 1826 0180 0 1 IC NE555N 02910 NE555N A2 U27 1820 1730 6 1 IC SN74LS273N 01698 SN74LS273N A2 U28 1826 0821 6 1 ANLG SW 03285 AD7512DIJN A2 UlOO 1820 1730 6 1 IC SN74LS273N 01698 SN74LS273N A2 UlOl 1820 1730 6 1 IC SN74LS273N 01698 SN74LS273N A2 U102 1820 0801 0 1 IC MC10101P 02037 MC10101P A2 U103 1820 1400 7 1 IC MC1010...

Page 324: ...able A 4 Control Board Parts List continued Reference HP Part CD Qty Description Manuf r Part A2 VRl 1902 0786 4 1 DIO ZNR 1N937 02688 A2 Wl 8159 0005 0 1 RES 0 CWM 01339 L 2007 1 A 32 Replaceable Parts ...

Page 325: ...1 A3 C13 0160 6623 5 1 CAP O luF 50 V 02010 SA115Cl04MAAH06121 A3 C14 0160 6623 5 1 CAP O luF 50 V 02010 SA115Cl04MAAH06121 A3 C15 0160 6623 5 1 CAP O luF 50 V 02010 SA115Cl04MAAH06121 A3 C16 0160 6623 5 1 CAP O luF 50 V 02010 SA115C104MAAH06121 A3 C17 0160 6623 5 1 CAP O luF 50 V 02010 SA115C104MAAH06121 A3 C18 0160 6623 5 1 CAP O luF 50 V 02010 SA115Cl04MAAH06121 A3 C19 0160 6623 5 1 CAP 0 luF 5...

Page 326: ... CONN POST TP HDR 04726 3432 5202 A3 J2 1252 1979 0 1 CONN POST TP HDR 04726 3627 5202 A3 J3 1251 3167 0 1 CONN POST TP BDY 03418 09 50 3041 A3 J4 1251 4670 2 1 CONN POST TP HDR 02946 68000 603 A3 J5 1251 4672 4 1 CONN POST TP HDR 02946 68000 610 A3 MPl 1400 0824 7 1 STRAP CABLE 04225 TY 23M A3 Ql 1853 0281 9 1 XSTR PNP 2N2907A 02037 2N2907A A3 Rl 1810 0280 8 1 NETWORK RES SIP 05524 MSPlOAOl A3 R2...

Page 327: ... 01698 SN74LS244N A3 U lO 1LJ6 0001 7 1 28480 1LJ6 0001 A3 U12 1820 1216 3 1 IC SN74LS138N 01698 SN74LS138N A3 U13 1820 1216 3 1 IC SN74LS138N 01698 SN74LS138N A3 U14 1820 1216 3 1 IC SN74LS138N 01698 SN74LS138N A3 U15 1820 1414 3 1 IC SN74LS12N 01698 SN74LS12N A3 U16 1820 1997 7 1 IC SN74LS374N 03406 DM74LS374N A3 U17 1820 1216 3 1 IC SN74LS138N 01698 SN74LS138N A3 U19 1820 1298 1 1 IC SN74LS251N...

Page 328: ...INTERFACE 02037 MC3448AL A3 U35 1820 1416 5 1 IC SN74LS14N 01698 SN74LS14N A3 U36 1820 1640 7 1 IC SN74LS366AN 01698 SN74LS366AN A3 U37 1820 1195 7 1 IC SN74LS175N 01698 SN74LS175N A3 U39 1820 1197 9 1 IC SN74LSOON 01698 SN74LSOON A3 U40 08112 13728 2 1 28480 08112 13728 A3 W3 8159 0005 0 1 RES 0 CWM 01339 L 2007 1 A3 W4 5180 2469 0 1 CABLE RBN 28480 5180 2469 A3 Yl 0410 0762 2 1 XTAL 4 000 MHZ 07...

Page 329: ...5 5041 0276 5041 0276 Table A 6 Keyboard Parts List CD Qty Description Manuf r Part 4 1 BD AY KEY 28480 08112 66504 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01542 3 1 LED LMP 01...

Page 330: ...60 9436 A4 S3 5060 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 S4 5060 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 S5 5060 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 S6 5060 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 S7 5060 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 SS 5060 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 S9 5060 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 SlO 5060 9436 7 1 SW PB SPST NO 04486 5...

Page 331: ... 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 S20 5060 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 S21 5060 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 S22 5060 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 S23 5060 9436 7 1 SW PB SPST NO 04486 5560 9436 A4 Wl 5180 2402 7 1 28480 5180 2402 Replaceable Parts A 39 ...

Page 332: ...2 1990 0486 6 1 LED LMP 01542 HLMP 1301 A5 DS13 1990 0486 6 1 LED LMP 01542 HLMP 1301 A5 DS14 1990 0486 6 1 LED LMP 01542 HLMP 1301 A5 DS15 1990 0486 6 1 LED LMP 01542 HLMP 1301 A5 DS16 1990 0486 6 1 LED LMP 01542 HLMP 1301 A5 DS17 1990 0486 6 1 LED LMP 01542 HLMP 1301 A5 DS18 1990 0486 6 1 LED LMP 01542 HLMP 1301 A5 DS19 1990 0486 6 1 LED LMP 01542 HLMP 1301 A5 DS20 1990 0486 6 1 LED LMP 01542 HL...

Page 333: ...51 7430 8 1 CONN POST TP HDR 08839 5912575 A5 J2 1251 7431 9 1 CONN POST TP HDR 08839 5920575 A5 Sl 3101 2529 1 1 SW RKR DPDT 08360 326 2 01 A5 S2 3101 2529 1 1 SW RKR DPDT 08360 326 2 01 A5 S3 3101 2529 1 1 SW RKR DPDT 08360 326 2 01 A5 S4 3101 2529 1 1 SW RKR DPDT 08360 326 2 01 Replaceable Parts A 41 ...

Page 334: ......

Page 335: ...ment the changes from the latest back to the earliest change which applies to your instrument For example if the serial number of your instrument is 2633G04470 implement changes in order from Change 57 to 36 Change 35 and earlier would have been incorporated during manufacture Where changes to components occur modify the appropriate schematic and component layout accordingly Some components may ha...

Page 336: ... to G05780 40 G00705 to G00729 12 G05781 to G05830 41 G00730 to G01180 13 G05831 to G06180 42 G01181 to G01580 14 G06181 to G06580 43 G01581 to G01630 15 G06581 to G06930 44 G01631 to G01855 16 G06931 to G07230 45 G01856 to G01930 17 G07231 to G07280 46 G01931 to G02105 18 G07281 to G07380 47 G02106 to G02180 19 G07381 to G07680 48 G02181 to G02255 20 G07681 to G07780 49 G02256 to G02330 21 G07781...

Page 337: ...r make the following changes to the appropriate parts lists Instrument case In Appendix A Table A 2 modify Reference Description HP Part AO 08112 MP2 SHAFT POWER SW 08112 43701 MPS FRAME REAR 5020 8814 MP9 PANEL REAR 08112 60253 Display Board In Appendix A Table A 7 modify Reference A5 08112 66505 DS26 DS27 DS28 DS29 HP 18 Board In Appendix A Table A 8 modify Description DISPLAY NUM DISPLAY NUM DI...

Page 338: ...kdating Reference Description HP Part A3 08116 66523 MPl CLAMP CABLE 1400 0304 RIVET 0 125 0361 0140 Several component changes were made to improve pulse response in Linear and Fixed Transition Mode For instruments with serial numbers 2136G00219 and lower make the following changes to the appropriate parts list In Appendix A Table A 3 modify Reference Description HP Part Al 08112 66501 C532 CAP 1 ...

Page 339: ...o the appropriate parts lists Main Board In Appendix A Table A 3 modify Reference Description HP Part Al 08112 66501 R437 RES 16 2D 1 5 0698 7265 In Appendix A Table A 3 delete Reference Description HP Part Al 08112 66501 R325 to R329 This change was to clarify incorrect labelling on the ROM ICs No change action is required however do not order replacement ICs as detailed in the first table below ...

Page 340: ...struments with serial numbers 2136G00405 and lower make the following changes to the appropriate parts list Microprocessor Board In Appendix A Table A 5 delete Change 9 Reference Description A3 08116 66523 TP8 Test point W2 Wire jumper HP Part 0360 0535 8159 0005 Two bus termination resistor networks were changed to reduce crosstalk For instruments with serial number 2136G00579 and lower make the ...

Page 341: ...dix A Table A 3 modify Reference Description HP Part Al 08112 66501 R317 R F 2k 0757 0283 In Appendix A Table A 3 delete Reference Description HP Part Al 08112 66501 C541 C F 0 01 µF The performance of the rate ICs was improved With introduction of new version components and values were changed For instruments with serial number 2136G00730 and lower make the following changes to the appropriate pa...

Page 342: ...ription HP Part A2 08112 66502 R62 R F 51 1 kl 0757 0458 R64 R F 51 1 kl 0757 0458 VR2 DIODE ZENER 4 3 V 1 1902 0949 VR4 DIODE ZENER 4 3 V 1 1902 0949 Microprocessor Board In Appendix A Table A 5 add Change 13 Reference Description HP Part A3 08116 66523 Wl Jumper 8159 0005 Component changes to improve slope accuracy and prevent erroneous error message E31 For instruments with serial number 2136G0...

Page 343: ...r 10 7 will be as detailed in Table B 2 For instruments with serial number 2343G01130 and lower make the following changes to the appropriate parts list Main Board In Appendix A Table A 3 delete Reference Description HP Part Al 08112 66501 C541 Capacitor 0 01 µF 100 V 0160 3879 In Appendix A Table A 3 modify Reference Description HP Part Al 08112 66501 C414 Capacitor 15 pF 0160 4385 RlOO Resistor ...

Page 344: ...855 10 274F AOAH U397 6AH5 UACl 11 89CC 5U76 6U6P 99AU 9C5F 13 U630 P4Al UlA3 OP4H A375 14 4P70 9U82 7512 H4F6 0064 15 llUF HOF4 C3AU 8FC2 22A3 16 A3CP 28P7 89P4 7HU1 F55F 17 4C7P AH62 99Cl 1P86 668A A ferrite bead was introduced around the base connector of Q400A and the value of C535 altered to improve pulse performance when ringing and fall times are excessive as shown in Figure B 1 For instrum...

Page 345: ...nd to provide a cleaner signal at low period times Other component value changes were to compensate for slight variations in dual transistor performance For instruments with serial number 2343G01630 and lower make the following changes to the appropriate parts lists In Appendix A Table A 3 modify Reference Description Al 08112 66501 R406 R408 R421 In Appendix A Table A 3 add Resistor Resistor Resi...

Page 346: ...rence Description HP Part Al 08112 66501 C240 R7 Capacitor 10 pF 0160 3874 Resistor 4 87 k 0698 4444 In Appendix A Table A 3 delete Reference Description HP Part Al 08112 66501 R7 Resistor 4 42 k 0698 4442 Component value changes were introduced with a change in dual transistor supplier Glass spacers were fitted to the leads of R419 to increase inductance and the ferrite bead was discarded from Q4...

Page 347: ...changes and substitution caused by a changeover from lkx4 RAM chips to 2kx8 For instruments with serial number 2343G02105 and lower 1 Make the following changes to the appropriate parts lists Microprocessor Board In Appendix A Table A 5 modify Reference Description HP Part A3 08116 66523 UlO IC RAM 444C 1818 1330 In Appendix A Table A 5 delete Reference Description HP Part A3 08116 66523 R21 U38 I...

Page 348: ...board 08116 65523 Modify Chapter 10 7 Figure 10 7 5 accordingly U 30 5 R W R W ADDRESS BUS _ DATA BUS TO U29B 8 TO U2B l 1 0 Alil 5 A l 6 A2 7 A3 4 A4 3 A5 2 A6 1 A7 1 7 AB 1 6 A9 1 5 0 7 1 1 06 1 2 0 5 1 3 0 4 1 4 t l B CS VCC G l G2 1 2 4 N B 1 6 I 32 64 1 2B 256 5 1 2 U l l RAM r 1 J 2 1 J 2 1 J 2 1 J 2 1 9 R W A0 A l A2 A3 A4 A5 A6 A7 AB A9 TO U2B 1 1 1 0 5 6 7 4 3 2 1 1 7 1 6 1 5 03 1 1 02 1 ...

Page 349: ...arts identified below you should take care before ordering a replacement from the parts list in Appendix A of this manual Any part containing a screw thread will require new compatible screws and the instrument case will then contain a mix of screw types Instrument For instruments with serial number 2343G02255 and lower make the following changes to the appropriate parts lists In Appendix A Table ...

Page 350: ...lower This change introduced ferrite beads 1514 and 1515 on the base of Q400 and the collector of Q402 respectively The change is associated with change 18 and was found to ensure more stable performance when the dual transistor type was changed For instruments with serial number 2507G02630 and lower A new microprocessor board 08116 66533 was introduced which gave improved jitter and standard sett...

Page 351: ...erence Description HP Part Al 08112 66501 C246 Capacitor 0 047 µF 0160 0575 Made R53 value selectable during manufacture and thus added an alternative value to the parts list For instruments with serial number 2522G03055 and lower make the following changes to the appropriate parts lists In Appendix A Table A 4 delete Reference Description HP Part A2 08112 66502 R53 Resistor 4 42 k 0698 4442 Compo...

Page 352: ...ppropriate parts lists Main Board In Appendix A Table A 3 delete Reference Description HP Part Al 08112 66501 C200 Capacitor 12 pF 0160 4521 New heat sink introduced by metrication Components added to improve switch on reset conditions For instruments with serial number 2522G04130 and lower make the following changes to the appropriate parts list Main Board In Appendix A Table A 3 modify Reference...

Page 353: ...ription HP Part AO 08112 MP8 FRAME REAR 5021 5814 This change was reversed by change 37 to provide improved screening This means if your instrument pre dates this change implement Change 34 and ignore Change 37 Components on the main board and control board were allocated alternative values to improve pulse specification In Appendix A Table A 3 modify Reference Description HP Part Al 08112 66501 c...

Page 354: ...nges made to improve adustment range For instruments with serial number 2633G04505 and lower make the following changes to the appropriate parts list Main Board In Appendix A Table A 3 modify Reference Description HP Part Al 08112 66511 R302 R308 Resistor Network 680 0 1810 0332 For instruments with serial number 2633G04530 and lower make the following changes to the appropriate parts list Main Bo...

Page 355: ...O 08112 MPS FRAME REAR 5021 0512 This change applied only to a special version of the HP 81 12A and therefore is not detailed here Changes to part numbers on introduction of improved D A converter chips For instruments with serial number 2633G04830 and lower make the following changes to the appropriate parts lists Main Board In Appendix A Table A 3 modify Reference Description HP Part Al 08112 66...

Page 356: ... drawings etc for older style microprocessor boards are given here For instruments with serial number 2633G05780 and lower 1 Make the following changes to the appropriate parts lists and trouble shooting information Instrument In Appendix A Table A 3 and Table A 5 modify Reference Description HP Part AO 08112 A3 BD AY MICROPRCR 08112 66533 Microprocessor Board In Appendix A Table A 5 modify B 22 B...

Page 357: ...S 0837 0050 U5 ROM 6 08112 13721 U6 ROM 5 08112 13722 U7 ROM 4 08112 13723 U8 ROM 3 08112 13724 U9 ROM 2 08112 13725 U28 XSTR QUAD PNP 1858 0058 W5 RES ZERO OHMS 8159 0005 UlO RAM 1818 1768 SOCKET 24 PIN 1200 0541 TEST POINT 0360 2264 2 Figure B 4 shows the location of the ROMs on microprocessor board 66533 modify Figure 10 7 9 A3 M ICROPROCESSOR BOARD 08116 66533 J1 TP7 SV U5 Figure B 4 081 16 66...

Page 358: ...AG 1 3 03 AG 13 03 AG 13 03 l8 AG 14 04 AG 14 04 AG 1 4 04 AG l S OS AG lS OS AG lS OS AG 16 06 AG 16 06 A G 16 06 AG 1 7 07 AG 17 07 AG 1 7 07 i12 ROM2 lL2 i12 ROM3 ROM4 ROMS ROM6 S000 SFFF A000 AFFF B000 BFFF A0 8 1 I C SV A0 e 1 I SV A0 8 1 I c sv Al 7 A l 7 A l 7 A2 s 2 C S A2 6 2 A2 6 2 C l 4 4 4 A3 s 8 10 lu A3 s 8 A3 s 8 10 l u A4 4 A4 4 A4 4 LS ISi LS 1 l S r AS 3 32 f AS 3 32 AS 3 32 AS 2...

Page 359: ... modify Figure 10 7 9 accordingly Figure B 6 081 16 66533 U28 layout 5 Figure B 7 shows the RAM battery supply circuit on microprocessor board 66533 modify Figure 10 7 5 accordingly 5 v R18 sr1 J 24 U10 i7 Figure B 7 081 16 66533 U28 schematic R10 R10 RT1 Backdating B 25 ...

Page 360: ...7 4 as shown in Figure B 8 U30 U34 Figure B 8 081 16 66533 Deletion of W3 7 Figure B 9 shows the microprocessor reset circuit on microprocessor board 66533 modify the schematic Figure 10 7 5 accordingly 5 v RESET Figure B 9 081 16 66533 Reset circuit ...

Page 361: ...63 12 8 12 A4 1U5P 13 11 9 A5 0356 14 13 7 A6 U759 15 15 5 A7 6F9A 16 17 3 A8 7791 17 2 18 A9 6321 18 4 16 AlO 37C5 19 6 14 All 6U28 20 8 12 A12 4FCA 22 11 9 A13 4868 23 13 7 A14 9UP1 24 15 5 A15 0002 25 17 3 Table B 4 Main Decoder Signature Analysis Main Free Run U12 U13 U14 U9 us U7 U6 U5 TP Decoder S A Pin Pin Pin Pin Pin Pin Pin Pin 2340 15 4 1C66 14 4 ROM2 20UO 12 20 2 ROM3 4685 1 1 20 3 ROM4...

Page 362: ... 10 H883 13 1 1 9 In Chapter 10 7 modify the section on trouble shooting the ROM as follows ROM The ROMs can be checked using signature analysis 1 Set the microprocessor to free run as described in Chapter 10 7 and connect the signature analyzer probes as instructed Signature Analyzer Probe connections for ROM Test Probe Trigger Connect to Start See Table B 6 Stop f See Table B 6 Clock TP E Ground...

Page 363: ...FP6U 5U29 17 4C7P 2125 8PF7 A795 P3F3 Changing the ROM If the ROMs are changed the data saved in the RAM has to be made compatible with the new ROMs This can be done by setting the HP 8112A to RCL 0 and turning the instrument off and on again Change 42 If the instrument becomes totally inoperable switch it off and disconnect the RAM back up battery for at least 30 seconds This will destroy the sto...

Page 364: ... 66511 MP2 MP3 Insulator 08112 05401 Change 45 For instruments with serial number 2739G06930 and lower make the following changes to the appropriate parts list Main Board In Appendix A Table A 3 modify Note B 30 Backdating Reference Description Al 08112 66511 C523 524 CAP 270 µF 40 V In Appendix A Table A 3 delete HP Part 0180 2455 Reference Description HP Part Al 08112 66511 Wl2 13 In Appendix A ...

Page 365: ... This change duplicates change 55 Control Board In Appendix A Table A 4 modify Change 47 Reference Description HP Part A2 08112 66502 R37 R38 Resistor 200 n 2100 3212 Changed component value to provide greater adjustment range and eliminate select on test value For instruments with serial number 2739G07280 and lower make the following changes to the appropriate parts list Main Board In Appendix A ...

Page 366: ...y Reference Description HP Part AO 08112 MP7 FRAME FRONT 5021 5813 MPS FRAME REAR 5021 0512 MP17 COVER BOTTOM 5001 1227 MP18 COVER TOP 08112 04160 MP20 TRIM STRIP 5001 0438 MP21 TRIM STRIP 5040 7203 MP22 FOOT 5040 7201 MP23 PNL REAR STD 5040 7221 MP24 FOOT REAR N SKI 5040 7222 Bl FAN TBAX 3160 0266 In Appendix A Table A 2 add Reference Description HP Part AO 08112 B2 MOD MOTOR CON 3160 0310 Microp...

Page 367: ...rument In Appendix A Table A 2 modify Reference Description HP Part 1 0 pF 0160 4380 HP Part AO 081 12 Fl Fuse 750 mA 2110 360 IC changed to LS type For instruments with serial number 2851G07780 and lower make the following changes to the appropriate parts lists Main Board In Appendix A Table A 3 modify Reference Description Al 08112 66511 R422 Resistor HP Part 4 64 k 0698 3155 Microprocessor Boar...

Page 368: ...t values to increase adjustment range For instruments with serial number 2851G08630 and lower make the following changes to the appropriate parts list Main Board In Appendix A Table A 3 modify Reference Description Al 08112 66511 R410 Resistor R411 Resistor Heatsink added to Q282 HP Part 500 n 2100 0554 2 61 k 0698 7246 For instruments with serial number 2851G08780 and lower make the following cha...

Page 369: ...C283 Capacitor 08116 04151 HP Part 0 001 µF 0160 3878 Change 55 For instruments with serial number 2851G08699 and lower make the following changes to the appropriate parts lists Change 56 Main Board In Appendix A Table A 3 modify Reference Description HP Part Note Al 08112 66511 Q282 Q283 XSTR PNP 1853 0218 This change is repeated by change 46 Component value change For instruments with serial num...

Page 370: ...le A 3 modify Reference Description HP Part Al 08112 6651 1 C200 C220 Capacitor 15 pF 0160 4385 C240 Capacitor 18 pF 0160 4492 R30 Resistor 200 n 0757 0407 For instruments with serial number 3205G10006 and lower 1 Make the following changes to the appropriate parts lists In Table A 2 modify Reference Description HP Part AO 08112 Al BD AY MAIN 081 1 2 6651 1 A3 BD AY MICROPRCR 081 12 66534 MPS FRAM...

Page 371: ...P29 FUHLR CMPNT 1400 0090 MP31 CLMP CA 1400 0024 MP32 STDF HEX 327 IN 0380 0644 MP34 WSHR LK HLCL 2190 0074 MP41 WSHR LK INTL T 2190 0016 In Table A 2 delete Reference Description HP Part AO 08112 Cl CAP 0 047uF 0 V 0160 4323 MP50 CHASSIS 08116 60101 MP51 BRACKET XFMR 08116 01203 MP52 BRACKET XFMR 081 16 01201 MP54 SCR TPG 8 16 0624 0413 MP55 COVER 08116 04123 Main Board In Table A 3 modify Refere...

Page 372: ...6 CAP O luF 50 V C20 0160 5746 CAP O luF 50 V C21 0160 5746 CAP O luF 50 V C22 0160 5746 CAP O luF 50 V C23 0160 5746 CAP O luF 50 V C24 0160 5746 CAP O luF 50 V C25 0160 5746 CAP O luF 50 V C26 0160 5746 CAP O luF 50 V C27 0160 5746 CAP O luF 50 V C28 0160 5746 CAP O luF 50 V C30 0160 5746 CAP O luF 50 V C31 0160 5746 CAP O luF 50 V C32 01 60 5746 CAP O luF 50 V C33 0160 5746 CAP O luF 50 V C34 0...

Page 373: ... 1 251 4672 R25 RES lOK 1 125W 0757 0442 R26 RES lOK 1 1 25W 0757 0442 R27 RES 3 16K 1 0757 0279 In Table A 5 add Reference Description HP Part A3 081 12 Pl SHUNT PROGRAMMAB 1 258 0124 R23 RES lOK 1 125W 0757 0442 U18 IC SN74LS273N 1820 1730 W2 RES ZERO OHMS 8159 0005 2 In the section Rear Panel in Chapter 4 delete Figure 4 12 and add the following figure and text 0 1 1 1111111111111I Figure B 10 ...

Page 374: ...rom the address switch on the rear panel when the instrument is switched on The address switch is set at the factory to 12 decimal 01 w I Figure B 1 1 HP IB Address Switch Factory setting Pressing the LCL key displays the current address while the key is depressed When allocating addresses ensure that no two instruments on the bus have the same address To change the instrument address 1 Change the...

Page 375: ...ge of the board over the locating lugs on the inside of the right hand side panel as seen from the front of the instrument 6 Remove the screen covering the control board 7 Lift the control board and stand it vertically by placing the cut outs on the edge of the board over the locating lugs on the inside of the left hand side panel as seen from the front of the instrument 7 In the section Troublesh...

Page 376: ...to make re assembly simple 3 Remove the bottom cover from the instrument Remove the heatsink located in front of the fan by unscrewing the two screws A 4 Remove the two screws B holding the rear frame to the brackets 5 Remove the four screws C holding the rear frame to the side frames 6 Remove the rear frame by pulling it gently backwards If necessary the fan can be removed by unscrewing screws D ...

Page 377: ...om the outputs of the line filter 9 In Chapter 10 7 replace the component location diagram for the Microprocessor Board Figure 10 7 8 with the following 9 ffi El 1 LJ Wl ffREEJ NOAl ll U40 U30 HP2 Figure B 13 Microprocessor Board A3 Component Layout and Locator 10 In Appendix A delete Figure A 1 and Figure A 2 and add the following two figures Backdating B 43 ...

Page 378: ...Figure B 14 Mechanical Parts 1 B 44 Backdating ...

Page 379: ...A3 tlP3 HP40 4x P41 4x J4 i J2 I O a J I 1 I I a 4 I I I V3 tlP1 I Figure B 15 Mechanical Parts 2 Backdating B 45 ...

Page 380: ......

Page 381: ...er than that shown on the title page of this manual Please file all update information behind this page If any text or drawings are affected it is useful to indicate whether that update information has been incorporated in the manual You should ensure that you request update information for this manual at regular intervals from Hewlett Packard Updating C 1 ...

Page 382: ......

Page 383: ...12A January 1992 081 12 90004 Checkthe following table foryour instrument serial prefix serial number EDC and make the listed changes to your manual New Item Serial Prefix or Serial Number ERRATA 3205010181 3205010381 3205010706 3205010986 320501 1016 320501 1616 320501 1841 10 July 1996 Manual Changes 1 2 3 4 5 6 7 OTS V Y i i d Page 1 of 16 ...

Page 384: ...EL 8112A INDEX OF MANUAL CHANGE MANUAL CHANGE FRAME Al A2 A3 AS ERRATA 1 C l8 19 281 Cl C31 0 312 C314 405 C507 508 C519 520 C521 522 2 J3 W3 3 U301 401 4 UIO 5 U301 6 DS21 7 U401 10 July 1996 Page 2 of 16 ...

Page 385: ...ts to read A3 U40 081 12 13729 ROMl On Page 9 2 Adjustment Procedure change to read Al C541 O OluF was pF On Page 9 3 Adjustment Procedure change to read Al was A2 Al was A2 R243 R248 On Page 9 3 Adjustment Procedure add Al C245 47pF 46 4k_ endash 51 lK_ 1 96k On Page a 36 change the Table ofRepl Parts List add A3 W2 8159 0005 RES O CWM 10 July 1996 Page 3 of 16 ...

Page 386: ... a special linking kit is required 10 July 1996 HP Part Number 5062 4001 5062 3972 5062 3996 5062 4022 081 16 68703 5062 3996 5062 4022 1494 0015 081 16 68703 5062 3974 5061 9694 5062 3996 2x 081 16 68703 5062 3996 1494 001 5 2x 081 16 68703 081 16 68704 Description Bail Handle Kit Rack Mounting Flange and Filler Panel Kit Support Shelf Filler Panel Special Mounting Kit Support Shelf Filler Panel ...

Page 387: ...through HP 10100C 50 ohms 2 W see Figure SO ohms lO W Feedthrou Termination Add Figure Feedthrough Termination 10 July 1996 FHd htough TerID11talicln Tiu r ach ftt H be 1111Cd 011tr wk c1c 1 c4 lot DC ol1 r TIM Cotlowii 1 Ji1111re _ a 6dw a1ic aa4 a ts list tACCf I IDr 11M a M TM cue prctwiM1bt i4i 1aaJ mAi l i rHlllli 1 i ie rit F9 re 1 SO Q 0 1 10 W FHOllWOUVI f llliftallGll R s lOO ll 10 D 3 W ...

Page 388: ...rformance Pulse Performance Test First table change to read Settling Time Second table IOO ns third line in the first table Delete settling time test with linear transitions Delete Settling Time 107 ns page 8 38 Testing Performance Test Record page ofPulse Performance First table Change to read Settling time Second table Delete Settling time 10 July 1996 100 ns 107 ns third line in the second tabl...

Page 389: ... press NPLC button press period then I keys terminate with ENTER key HP 3456A setup for peak voltage measurement Function V TRIGGER EXT N CYC INT 0 1 press period then l keys press STORE button press CHS N CYC INT key page 9 2 Adjustment Procedures Table 9 1 Adjustment Procedures Changeable Components change to read Procedure Reference Range Description Overshoot Transition Times Al C532 0 pF open...

Page 390: ...and verify it page 10 7 9 Servicing the Microprocessor Schematic 2 3B Figure 10 7 5 J3 W3 5 1V 2 5 1V B J3 4 J3 3 0 J3 1 8 J3 2 5 POD page A 2 Replaceable Parts Add as a title MASTER PARTS page A 3 Replaceable Parts Add as a title to the uppertwo figures MASTER PARTS continued Add as a title to the third figure KEYBOARD PARTS 10 July 1996 Page 8 of 16 ...

Page 391: ... AO MP19 HEATSINK OUTPUT AO MP20 TRIM STRIP AO MP21 TRIM STRIP AO MP22 FOOT AO MP24 FOOT REAR N SKI AO MP33 COVER PLASTIC AO Tl TRANSFORMER PWR page A 14 Replaceable Parts Table A 3 Addthe descriptions Reference Description Al MPl PLATE TRANSISTOR Al MP2 PLATE INSULATOR Al MP3 PLATE INSULATOR Al MP4 to Al MP20 see next Page 10 Al MPIOO BRACKET Al MP500 TRANSISTOR HEATSINK 10 July 1996 Page 9 of 16...

Page 392: ...MPl l 3 2950 0072 NUT HEX DBL CHA Al MP12 4 2190 0067 WSHR LK INTL T Al MP1 3 0 2190 0584 WASHER LK HLCL Al MP14 7 3050 0891 WASHER FL MTLC Al MP1 5 4 3050 1 101 WASHER SHLDR 3 Al MP1 6 9 051 5 1 1 1 1 SCR MACH M3X0 5 Al MP1 7 4 0535 0025 NUT HEX DBL CHA Al MP1 8 7 051 5 1755 SCR MACHINE Al MP1 9 0 2190 01 12 WSHR LK HLCL Al MP20 8 4330 0467 INSUL BEAD GLAS page A 24 Replaceable Parts Table A 3 Ad...

Page 393: ...CABLE AY EXT fRG IN page A 37 Replaceable Parts Table A 6 Add the descriptions Reference Description A4 MPl KEY CAP QUARTER A4 MP2 KEY CAP QUARTER A4 MP3 KEY CAP QUARTER A4 MP4 KEY CAP SRF G L A4 MP5 KEY CAP SRF G L A4 MP6 KEY CAP SRF G L A4 MP7 KEY CAP LCL A4 MP8 KEY CAP PRL G L A4 MP9 KEY CAP PRL G L A4 MPl O KEY CAP PRL GRA A4 MPl l KEY CAP PRL GRA 10 July 1996 Page 1 1 of 1 6 ...

Page 394: ...KEY CAP GRN LT A4 MP15 KEY CAP PRL G L A4 MP16 KEY CAP PRL G L A4 MP17 KEY CAP SRF G L A4 MP18 KEY CAP SRF G L A4 MP19 KEY CAP SRF GRA A4 MP20 KEY CAP PRL G L A4 MP21 KEY CAP PRL G L A4 MP22 KEY CAP PRL G L A4 MP23 KEY CAP PRL G L page A 39 Replaceable Parts Table A 6 Add the description Reference Description A4 WI CABLE AY RBN 260 MM 10 July 1996 Page 12 of 16 ...

Page 395: ...U140 level shifter Q200 or Period IC U200 E 1 3 change to read Possible failure ofWidth control circuit U6 U8 Error feedback U141 level shifter Q220 Period IC U200 or DelayIC U220 E 14 change to read Possible failure ofSlope control circuit U12 U13 U14 or U302 Slope range switching circuit Q305 to Q309 U300 reference circuit U320 Period IC U200 Delay IC U220 or Width IC U240 10 July 1 996 Page 1 3...

Page 396: ...CISPR 1 1 Group 1 Class A EN 50082 1 1991 IEC 801 2 ESD 4kV cd 8kv ad IEC 801 3 Radiated Immunity 3V m IEC 801 4 Fast transients O SkV lkV Supplementary Information During the measurements against EN 5501 1 the 110 ports wereterminated with their nominal impedance the HP IB connection was terminated with the cable HP 10833B When the product is connected to other devices the user must ensure that t...

Page 397: ... Parts List delete A3 J3 1251 3 1 67 On Page A 36 Repl Parts List add A3 W3 081 16 61693 CAP 0 47uF 50V CAP 0 47uF 50V CONN POST TB CBL BD AY S On 81 12A Manual Page 10 7 9 middle left side correct schematic as follows From Main Board Al J3 pin W3 J3 color Signal ground V 1 V gray ground page IB 2 green PDD ground V 3 V black ground 5 lV 0 4 red 5 IV NOTE EDC LBL ENGINEERING DATE CODE LABEL BOARD ...

Page 398: ...E 5 UlO On Page A 24 Repl Parts List change to read A 3408 Al MANUAL CHANGE 6 U301 On Page A 40 Repl Parts List change to read B 3550 A5 MANUAL CHANGE 7 DS21 1DB6 0001 1DC7 0001 1818 1768 1 826 0955 1990 1 840 On Page A 25 Repl Parts Table A 3 Parts List change to read A 3624 Al 10 July 1996 U401 1 826 0923 IC SNAKE IC BOOSTER IC HM61 16LP 3 IC 1DB6 LED LT BAR IC BOOSTER Page 16 of l6 ...

Page 399: ...kard Canada Ltd 6877 Goreway Drive Mississauga Ontario L4V 1M8 Canada Telephone 416 678 9430 Telex 069 8644 Fax 416 678 9421 Eastern Europe Hewlett Packard Ges m b H Lieblgasse 1 P O Box 72 A 1222 Vienna Austria Telephone 222 2500 0 Telex 13 4425 HEPA A Northern Europe Hewlett Packard S A V D Hooplaan 241 P O Box 999 NL 118 LN 15 Amstelveen The Netherlands Telephone 20 547 9999 Telex 189 19 hpner ...

Page 400: ...ackard Ltd United States of America Eastern USA Midwestern USA Southern USA Western USA D 2 Sales and Service Offices Nine Mile Ride Wokingham Berkshire RG1 1 311 Telephone 0344 773 100 Telex 848805 Fax 44 344 763526 Customer Information Center 800 752 0900 6 00AM to 5PM Pacific Time Hewlett Packard Co 4 Choke Cherry Road Rockville MD 20850 Telephone 301 670 4300 Hewlett Packard Co 5201 Tollview D...

Page 401: ...rters 3495 Deer Creek Road Palo Alto CA 94304 Telephone 415 857 5027 Telex 034 8300 Cable HEWPACK Hewlett Packard Trading S A Bureau de Liaison Bureau de Support Ville des Lions 9 Hai Galloul DZ BORDJ EL BAHRI Telephone 76 02 07 Fax 281 0387 Sales and Service Offices D 3 ...

Page 402: ......

Page 403: ...2 2 DTY 6 7 Duty cycle Specification 2 2 Duty Cycle error 6 16 E EOl 10 1 5 Ell 10 1 5 E12 10 1 5 E13 10 1 5 E14 10 1 5 E21 10 1 7 E22 10 1 7 E31 10 1 7 E32 10 1 7 E33 10 1 7 E34 10 1 7 E35 10 1 7 E36 10 1 9 E37 10 1 9 E38 10 1 9 E39 10 1 9 E41 10 1 9 E42 10 1 9 E51 10 1 9 E52 10 1 9 Environmental characteristics 2 7 Error Duty cycle 6 16 Input 6 17 Limit 6 14 reporting 6 13 Slope 6 15 Syntax 6 15...

Page 404: ...eys DBL 4 14 Keys DEL 4 14 Keys DTY 4 14 Keys CE 4 14 Keys LEE 4 14 Keys LOL 4 14 lndex 2 Keys PER 4 13 Keys IT 4 14 Keys STO RCL 4 15 Keys TRE 4 14 Keys WID 4 14 L LO Ll 6 11 LD 6 8 Learn modes 2 6 LEE 6 7 Limit error 6 14 Linear Transitions Specification 2 2 LLO 6 18 Local lockout 6 2 Local mode 6 2 LOL 6 8 Low Level Specification 2 3 LU 6 8 M Ml MS 6 6 MD 6 8 Memory 2 6 Message times 2 7 MLA 6 ...

Page 405: ...3 1 Trigger Input 10 3 1 Servicing position 10 1 3 Shaper IC 10 1 1 10 4 1 Signature Analysis 10 7 15 Slope Error 6 15 Slope Generator IC 10 1 1 Slope IC 10 3 7 SPD 6 18 SPE 6 18 Specifications 2 1 SRO 6 9 SRl 6 9 SRQ 6 13 6 17 Standard Parameter Set 4 4 Status byte 2 7 6 13 Status reporting 6 13 STO 6 9 SU 6 8 Switching on 4 2 Syntax error 6 15 T Tl T3 6 6 Test Recommended test equipment 1 4 Self...

Page 406: ...u Power Supply 10 2 9 Shaper 10 4 11 UNL 6 18 UNT 6 18 v VCO IC 10 3 7 Verification Tests 8 1 Vernier lndex 4 Programming 6 8 w WO W 6 7 Waveform programming 6 7 Weight 2 7 WID 6 7 WIDC 4 8 ...

Search results

Summary of Contents for 8112A

Reviews:

Related manuals for 8112A

Brands by name

Popular brands

HP 8112A, Operating, Programming And Servicing Manual

Search results

Summary of Contents for 8112A

Reviews:

Related manuals for 8112A

Brands by name

Popular brands