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HP 8114A, Service Manual

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HP 8114A Service Guide

On the Power Supply Board:

1. Connect the cable from the isolating mains transformer to the

mains power connector

2. Connect the fan to 5401 from pin 32b to pin 

 This is essential

as the Power Supply will not run with the fan disconnected

3. Connect the 

 load resistor to 

 -5.2 V supply, from 

 pin

26a (-5.2 V) to pin 24a (AGND)

4. Connect the 

 load resistor to the + 10 

 supply, from 

pin 8a 

 

10 VFL) to pin 2a (FLGND)

5. Apply power to the isolating transformer and observe the fans.

If the fans are not running:

1. Disconnect mains power and check that the fans are physically OK,

that is free from damage or obstruction

2. Using 

an 

Ohmmeter check for   1   continuity: the main fuse,

FH401, inductor T400, switch 

 filter 

 and the mains

cable, including any fuse fitted in the power plug.

SCR Q401 suppresses low impedance voltage peaks on the supply
line. If this SCR fails, it may not be immediately noticeable, but
test-bench fuses may fail if high line voltage peaks occur during
high current operation of the HP 8114A.

Warning

Voltages are present which can be hazardous to life.

Power Supplies

Fixed Supplies

1. Check the fixed supplies agaist AGND at testpoint TP2:

 5-2. Fixed Power Supplies

Supply Voltage Typical Measurement

 Troubleshooting

Summary of Contents for 8114A

Page 1: ...4A 100 V 2 A Programmable Pulse Generator OTS LIBRARY OTS LIBRARY lll1ll1lllllllllllllllllllllllllllllllllllllllilllll Ill1Ill1 2 4 0 0 0 1 0 7 4 7 HP Part No 08114 91021 Printed in Germany December 1994 Edition 1 O El294 ...

Page 2: ...do not perform any service unless qualified to do so Do not attempt internal service or adjustment unless another person capable of rendering Arst aid and resuscitation is present If you energize this instrument using an auto transformer for voltage reduction make sure that the common terminal is connected to the earth terminal of the power source Whenever it is likely that the ground protection i...

Page 3: ...y shall not apply to defects resulting from improper or inadequate maintenance by the Buyer Buyer supplied sofhvare or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance No other warranty is expressed or implied Hewlett Packard specifically disclaims the implied warranties of merchantabil...

Page 4: ...erformance tests for checking the HP 8114A against its specifications Disassembly and Reassembly How to disassemble and reassemble the HP 8114A Troubleshooting the HP 8114A Techniques for finding the causes of malfunction in the HP 8114A Replaceable Parts A list of all replaceable parts in the HP 8114A CLIP The component level information package of the HP 8114A can be obtained separately and inse...

Page 5: ...e PC Boards Restoring Default Settings Using the HP IB Device Command Overwriting Settings Firmware Upgrade Cards Memory Card Sizes 2 HP 8114A Pulse Generator Specifications General Environmental Safety Power requirements Maximum Dimensions H x W x D Weight Net Shipping Recalibration period Warranty Acoustic Noise Pressure Declaration of Conformity We declare that the product Supplementary Informa...

Page 6: ...on RMS Jitter Width Range Accuracy Resolution RMS Jitter Duty cycle Standard HP 8114A Baseline 0 V Variable Baseline Option 001 Delay Fixed delay Variable Range Accuracy Resolution RMS Jitter Double Pulse Delay Minimum Period Range Accuracy Resolution Minimum Period Trigger Output Level 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 5 2 5 2 5 2 5 2 5 2 5 2 5 2 5 2 5 2 5 2 5 2 5 2 6 2 6 2 6 2 6 2 6 2 6 ...

Page 7: ...nsitions Input frequency Minimum pulse width Input sensitivity Inhibit response time Maximum external voltage Trigger Modes Continuous Triggered Gated External Width Pulse Modes Burst Double Pulse Human Interface Display Help Key Memory Clear Memory Memorycard Remote Control Function Code Programming times 2 10 2 10 2 10 2 10 2 10 2 10 2 10 2 10 2 10 L 10 2 10 2 10 2 10 2 10 2 11 2 11 2 11 2 11 2 ...

Page 8: ... Equipment Needed Procedure Test 5 3 Delay Jitter Test Specifications Equipment Needed Procedure Test 6 Amplitude Test Specifications Equipment Needed Calculating out Measurement Uncertainties a Calculation for 500 into 5061 measurements Procedure b Calculation for HIZ High Z into 5062 measurements Procedure A Amplitude Test from 500 into 5061 Procedure B Amplitude Test from HIZ High Z into 500 Pr...

Page 9: ...e Removing the Power Supply Fan Refitting the Power Supply Fan Removing the Microprocessor Board Refitting the Microprocessor Board Removing the Timing Board Refitting the Timing Board Removing the Output Board Refitting t he Output Board Information to the Replacement Output Board Removing the Output Board Fan Refitting the Output Board Fan Removing the Motherboard Refitting the Motherboard Remov...

Page 10: ...e supply voltages Check the current sources for the period generator Delay Generator Check for the supply voltages Check the current sources for the delay generator Width Generator Check for the supply voltages Check the current sources for the width generator Edge Interface Differential Signal Output Inhibit Input Trigger Output Output Board Onboard Regulators Fixed Supply Floating Supplies Optoc...

Page 11: ...6 Replaceable Parts Exchange Parts List Exchange Boards Replacement Boards HP 8114A Parts List 6 l 6 l i 1 6 2 A Component Level Information Package Index Contents 7 ...

Page 12: ... Showing the Microprocessor Securing Screws 4 10 Location of the Timing Board 4 l 1 Location of the Output Board 4 12 Location of the Power Load Resistor and Power FET 4 13 Location of the Output Board Fan 4 14 Location of the Motherboard 4 15 Location of the Memory Card Connector Board 4 16 Front Panel Fixing Screws 4 17 Front Panel Subassemblies 4 18 Front Panel Subassemblies 5 1 Testpoints used...

Page 13: ...est 3 13 Leading Edge Setting 3 14 Trailing Edge Setting 3 15 Leading Edge Setting 3 16 Trailing Edge Setting 5 l Field Repair Level of HP 8114A Boards 5 2 Fixed Power Supplies 5 3 Floating Power Supplies 5 4 Settings for DIP Switch Sl 5 5 Power Supply Voltages on the Timing Board 5 6 Voltage Drops Across R402 5 7 Voltage at Pin 8 of U504C 5 8 Voltage Drops Across R502 5 9 Voltage Drops Across R60...

Page 14: ......

Page 15: ...erials for inspection by the carrier The HP office will arrange for repair or replacement without awaiting settlement Power Requirements A Caution BEFORE APPLYING AC LINE POWER TO THE HP 8114A ensure that the correct line fuse is installed in the fuse holder and the correct power cable is fitted The HP 8114A can operate from any single phase AC power source supplying 100 240 V in the frequency ran...

Page 16: ...ustrai a Denmark 8 I O 1369 8420 2956 iwltze land Ouln litnca PI O 4211 1 if 0 i I lnited Stares QO 8120 1378 Great Brltafn 8 120 1315 L 7J E II pi Japan 120V 8120 4753 c Figure l l Power Cables Plug Identifkation The following work should be carried out by a qualified electrician all local electrical codes being strictly observed If the plug on the cable does not fit the power outlet or the cable...

Page 17: ...strument s reliability or causing the instrument s thermal protection circuits to automatically switch off the instrument Thermal Protection Overheating Detection The HP 8114A monitors its internal temperature in the region of the power supply If the temperature exceeds approximately 80 C the power supply is switched off The instrument must be switched off to allow the detection circuit to recover...

Page 18: ...other excessive moisture Protect the FlP 8114A from humidity and temperature changes which could cause condensation within the instrument n Do not operate the HP 8114A in the presence of flammable gases fumes or powders Operation of any electrical instrument in such an environment constitutes a definite safety hazard 4 A When working with output voltages of 30 1OOV amplitude the output voltage can...

Page 19: ... upgrades only in Static Safe work areas ATTENTION Slstlc Sensltlve These instructions cover the installation of the option 001 variable baseline The retrofit kit number of the variable baseline is 08114 68701 1 Remove the instrument cover see instructions on page 4 5 Disassembly and Reassembly 2 Remove the power supply see instructions on page 4 7 Disassembly and Reassembly 3 Mount the variable b...

Page 20: ...ds the message HP8114 Boot Program appears 7 If you get the message Firmware is not newer then an update is unnecessary Press the MD softkey 8 You may get a message like There is 1 board unknown Load anyway Press the YES softkey The EPROMs are now erased and re loaded n The first EPROMS will now be erased and this message is displayed Erase U6 and Ui please wait n After one or two minutes you will...

Page 21: ... message Reboot in 2 minutes 9 Switch OFF the HP 8114A 10 Extract the Memory Card containing the new firmware 11 Switch ON the HP 8114A 12 The power on display will now show the new firmware revision and date Installing the HP 8114A l 7 ...

Page 22: ...e first method can lead to accidental erasure of wanted settings as all setups are replaced The second method replaces settings in each location individually so it is possible to restore defaults only where needed Using the EIP IB Device Command Using the HP IB device command SYSTem SECurity STATel ON all RAM stored information can be erased and replaced by the HP 8114A default settings Do not swi...

Page 23: ...ory cards of up to 2 M Byte can be used with the HP 8114A The following table shows how many setups of a fully configured IIP 8 114A can be stored in each size of Memory Card able 1 3 Memory Card size No of setups stored 128 K Bvte I 40 I 2 5 6 K Byte 80 512 K Byte 160 1 M Byte 3 2 0 2 M Byte 640 Installing the HP 9114A l 9 ...

Page 24: ......

Page 25: ...d from 0 C to 55 C ambient temperature Non warranted values are described as typical Parameters are are over and under programmable outside their specified ranges General Environmental Safety IEC348 safety class 1 Power requirements loo 240 Vat lo 50 60 Hz loo 120 Vat lo 400 Hz Power consumption 500 VA max Maximum Dimensions H x W x D 133 mm H x 426 mm W x 422 mm D 5 2 in x 16 8 in x 16 6 in Weigh...

Page 26: ...nt temperature up to SO C under normal operation and at the typical operator position LpA 45 1 dBA Measured in accordance with IS0 7779lEN 27779 GerPuschemissionswerte Bei einer Umgebllllgstemperatur bis 30 C LpA 45 1 dBA am Arbeitsplatz normaler Betrleb Angabe ist das Ergebnis einer Typpriifung nach IS0 7779iEN 27779 2 2 HP 8114A Pulse Generator ...

Page 27: ...R 11 Group 1 Class A EN 50082 l 1991 IEC 801 2 ESD 4kV cd 8kV ad IEC 801 3 Radiated Immunity 3Vim IEC 801 4 Fast Transients 0 5kV 1kV Supplementary Information During the measurement against EN 55011 the I O ports were terminated with their nominal impedance the HP IB connector was terminated with the cable HP 10833B When the product is connected to other devices the user must ensure that the conn...

Page 28: ... 8114A to external instruments When working in HIZ High Z Mode if you remove the external load the output voltage can be higher than the programmed voltage V can be as much as 130 V even when set as low as 2 V Current 40 0 mA to 2 00 A Accuracy 4 1 of amplitude lo0 mV Resolution 3 digits best case 10 mV 0 V ilOmV 50 5 of amplitude Variable Baseline Option 001 5061 source impedance only pulse withi...

Page 29: ... output Output Protection A 4 Maximum external voltage 100 Vpp from external 500 source 20 Vdc from external On source Limits Programmable level and duty cycle limits restrict the available output range to protect the DUT Pulse Performance Overshoot Preshoot Ringing t5 of amplitude h 50 mV Settling time Cl00 ns typical Transition Times Measured between 10 and 90 of amplitude 5061 into 5061 7ns amp...

Page 30: ...quency 1 00 Hz to 15 0 MHz Accuracy 33 zt100 ps Resolution 3 digits best case 100 ps RMS Jitter 0 03 25 ps 0 05 25 ps in the 66 7 ns to 100 ns range Width Can be set as width duty cycle or trailing edge delay Range 10 ns to 150 ms Accuracy zt5 1500 ps Resolution 3 digits best case 100 ps RMS Jitter 0 03 25 ps 0 05 25 ps in the 50 ns to 100 ns range 2 6 HP 6114A Pulse Generetor ...

Page 31: ...plitude Ranges Figure 2 l shows the maximum possible duty cycle for a given pulse amplitude from 5052 into 5061 Note that amplitude doubles from HIZ High Z into 508 In double pulse mode the actual duty cycle of the signal is twice the value displayed on the HP 8114A screen because two pulses are generated per pulse period Therefore the duty cycle available and set will be limited to half the value...

Page 32: ...gative Baseline m Negative pulse with positive Baseline n 5 V Baseline i 5 V negative or positive pulses Under the following conditions maximum duty cycle is 15 m Baseline 5 V and positive pulses m Baseline c 5 V and negative pulses Note also that the pulse is limited to a SO V window 500 into 5061 so that for positive pulses with positive Baseline or negative pulses with negative baseline the max...

Page 33: ... digits best case 10 ps RMS Jitter 0 03 25 ps 0 05 25 ps in the 50 ns to 100 ns range Double Pulse Delay Minimum Period Range Accuracy Resolution Minimum Period Double pulse delay replaces delay when double pulses are selected The delay between double pulses can be set as absolute delay or 96 of period 133 4 ns 20 0 ns to 999 ms Maximum value period width 4 ns 5 f250 ps 3 digits best case 100 ps 1...

Page 34: ... from External Input to Trigger Output 24 ns typical External Input An external signal at the external input can be used to trigger or gate the output signal Input impedance 10 k62 Threshold 10 V to 10 V with 100 mV resolution Maximum external voltage A 150 v Input transitions Cl00 ns Input frequency dc to 15MHz Minimum pulse width 10 ns typical Input sensitivity 1300 mV typical 2 10 HP 8114A Puls...

Page 35: ...lse signal 100 kQ 1 5 V TTL typical Cl00 ns dc to 5 MHz 100 ns typical 5300 mV typical 200 ns typical Maximum external voltage A 150 v Trigger Modes Continuous A continuous train of pulses or bursts of pulses is generated Triggered A transition rising falling or both at the external input or MANual trigger key triggers a pulse or burst of pulses Gated Active level high or low at the external input...

Page 36: ...rycard All pulse parameters at a glance on one display Displays context sensitive information The current setting plus nine user settings are stored in non volatile memory when the instrument is switched off Clear Memory Clears all stored user settings Instrument settings 350 bytes each are stored in MS DOS formatted PCMCIA memorycards Cards can also be used for convenient firmware updates Remote ...

Page 37: ...ing to the job that the button is doing I I I 1 i 7 I 1 4 I_1 0 Id ij P i_l _ jES This is an option shown on the display and is selected by use of the vernier keys It is shown in upper or lower case to match the case displayed Test Results lhbles Tables for entering the results of the tests are included at the end of this chapter The tests are numbered and reference numbers for each Test Result TR...

Page 38: ...meter HP 34686 DCV up to 20 V Pulse Generator HP 8112A 50 MHz Delay line HP 64008A 22 ns Caution HP 8114A is capable of providing output voltages that may exceed the input capabilities of connected test equipment The user should ensure that the setting up instructions in this chapter are followed exactly to prevent damage to connected test equipment Note Ihble 3 2 Recommended Accessories H P 3334O...

Page 39: ...rt Number 0699 0146 2 R2 200 0 lo 0 5 W Variable trimmer HP Part Number 2 100 3350 3 R3 681 0 l 0 5 W HP Part Number 0757 0816 4 BNC M HP Part Number 1250 0045 5 BNC F HP Part Number 1250 0083 Getting Started Instrument Serial Numbers You will need to write the serial numbers of the instrument These can be found as follows Press m SERIAL The HP 8114A display lists the instrument s product and seri...

Page 40: ... are as follows TTpl i l Timing Board Serial Number FRFIPIE Instrument Product Number and Serial Number E t ir II Variable Baseline Option 001 Serial Number When this option is fitted y 1 24 w E a n The current Software Revision number A j E Date when the current Software Revision was installed 3 4 Testing the HP 8114A ...

Page 41: ... On the HP 8114A press TRIGGER and set up page as follows m i ij1 1 f 1 1 4 I III 1 P ALc E I j rjgj e F ul ses 2 On the HP 8114A press OUTPUT and set up page as shown in the following illustration Configuring the Output Page 3 Connect the HP 8114A to the Counter as follows HP 81 i 4A UNDER TEST rip 53348 COUNTER Connecting HP 8114A to the Counter 4 Set the Counter to FUNCTION Period A INPUT A 50 ...

Page 42: ...I 66 7 ns 63 2711s to 70 14 ns l 1 100 ns 94 9 ns to 106 1 ns 1 2 600 ns 474 9 ns to 525 1 ns 1 3 1 PLS 949 9 ns to 1050 1 ns l 4 5 PS 4 76 s to 5 25 ps 1 5 5 0 is 47 5 ps to 52 5 ps 1 6 5 0 0 ps 4 7 5 ps to 525 ps 1 7 5 ms 4 76ms to 5 25 ms I 8 60 ms 47 5 ms to 52 6 ms 1 Q 500 ms 4 7 5 ms to 625 ms 1 10 3 6 Testing the HP 8114A ...

Page 43: ...FRCINT END WFH SM VBNC ADAPTOR Connecting FIP 8114A to the Scope 2 On the HP 8114A press TRIGGER and set up page as follows C ijf jTI t JfJ ll_i F ji_S n jj r gj t p lj se 3 On the HP 8114A press m and set up UJTPUT page as shown in the following illustration Configuring the Output Page 4 Set the Digitizing Oscilloscope HP 54121T n Press AUTOSCALE n Select the Display menu and set the Number of Av...

Page 44: ... in TIMEBASE Delay 38 ns 8 Press Delta t then PRECISE EDGE FIND key for each new Width setting reset scope delay to 16 ns 9 Check the HP 8114A pulse width at the following settings repeating step 8 for each width setting made on the HP 8114A lhble 3 4 Width Settings and TR Reference 10 Connect the HP 8114A to the Counter as shown PI 6 i 1A UNCER TEST HP 53 348 COUNXR Connecting HP 8114A to the Cou...

Page 45: ... HP 8114A width at the following settings Ihble 3 5 Width Settings and TR Reference Width Acceptable Range TR Entry 1 Js 949 5 ns to 1060 6 Ls 2 5 6 P 4 76 ps ps to 6 25 2 6 6 0 ps 47 5 JS to 52 5 s 2 7 5 0 0 x3 4 7 6 ps ps to 626 2 8 5 ms 4 75 ms to 5 25 ms 2 9 6 0 ms 47 5 ms to 52 5 ms 2 10 500ms 4 7 5 ms to 525 ms 2 1 1 Testing the HP 9114A 3 9 ...

Page 46: ...igitzing Oscilloscope with Accessories Pulse Generator Counter Cable 50 52 coaxial BNC Procedure 1 Connect HP 8114A to the Scope as shown WITH SMA BNC ADAPTOR Connecting HP 8114A to the Scope 2 Set the Pulse Generator to Period 1 PS Width 100 ns Amplitude 1 V Offset OV output Enable 3 Select the TRIGGER page on the HP 8114A and set up as follows IhTmEmmQUTPU71m I The TRIGGER Page Set up J 10 Testi...

Page 47: ...nnel 4 m Set Preset levels to 50 50 and press AUTO LEVEL SET n Select the Delta t menu and turn the time markers ON n Set START ON EDGE POSl and STOP ON EDGE POS 1 n Press the PRECISE EDGE FINDI key 6 Check the HP 8114A delay at the following settings Record the value of the fixed delay and subtract it from the other readings able 3 6 Delay Settings and TR Reference Oscilloscope Timebase Delay Acc...

Page 48: ...to FUNCTION TIA B INPUT A 50 0 INPUT B 50 n Il Check the HP 8114A delay at the following settings Note Subtract the fixed delay from the other readings able 3 7 Delay Settings and TR Reference Delay Acceptable Range TR Entry 1 PS Q4Q ns to 1061 ns 3 7 5 is 4 749 to 5 261 is ps 3 8 60 ps 41 5 to 62 5 ps ps 3 Q 600 ps 476 to 525 ps ps 3 10 5ms 4 75 ms to 6 25 ms 3 11 50 ms 47 6 ms to 52 5 ms 3 12 6o...

Page 49: ... digits best case 100 ps Accuracy 315 i 2 5 0 ps Min Period 133 4 ns Digitizing Oscilloscope with Accessories Counter Cable 50 Q coaxial BNC 1 Connect HP 8114A to the Scope as shown HP 8 I 4A UNDtR TEST AP 51 I 2 i7 FRONT END WilH ShIWBNC ADAPTOR Connecting EIP 8114A to the Scope Testing the HP g114A 3 13 ...

Page 50: ...Baselne 0 00V Width 10 0 kplitd 5 00V I 20 0 II 150R into 5 0 0 R JL Positive1 175 1 1 TRIGGER I I OUTPUT I I LIMITS 1 t 1 Configuring the Output Page 4 Set the Digitizing Oscilloscope HP 54121T I Set scope timebase to 5 nsidiv w Center the double pulse signal n Select the Display menu and set the Number of Averages to 32 I Select the Delta V menu and turn the Voltage markers On 3 14 Testine the H...

Page 51: ...ON EDGE POSl and STOP ON EDGE POS2 5 Press the PRECISE EDGE FIND key for each new double delay setting 6 Check the HP 8114A double delay at the following settings lhble 3 8 Double Delay Settings and TR Reference 7 Connect the HP 8114A to the Counter as shown Connecting HP 8114A to the Counter Testing the HP 81 MA 3 15 ...

Page 52: ...llustration Configuring the Output Page 11 Check the HP 8114A double pulse delay at the following settings pressing m to trigger a single cycle each time Ihble 3 9 Double Delay Settings and TR Reference Double Delay Acceptable Range TR Entry 500 ns 474 76 ns to 625 25 ns 4 4 1 P 949 75 ns to 1050 25 ps 4 5 5 p s 4 759 to 5 26 ps AS 4 6 60 ps 47 5 to 52 5 ps ps 4 7 500 ps 475 pLs to 626 ps 4 8 6 Il...

Page 53: ...ter 3 Delay Jitter RMS Jitter 0 03 25 ps 0 05 25 ps for period 100 ns Digitizing Oscilloscope with Accessories Delay Line 22 ns Power Splitter All cables 50 0 coaxial BNC 122 cm 4 ft High Power Attenuator 1 Connect HP 8114A to the Scope as shown HP 8 II 4A UNDER TESl SMWNCADAPTOR 1 I R Equipment Set up for Jitter Test Testing the HP 8114A 3 17 ...

Page 54: ...put Page 4 Set the Digitizing Oscilloscope HP 54121T n Press IAUTOSCALE H Select the Display menu and set the Number of Averages to 64 H Select the Channel menu and set the Attenuation factor of channel 4 to 10 n Set the VOLTS DIVof channel 4 to 10 mVldiv n Set OFFSET to 1V n Select the Timebase menu and set the TIME DIV to 100 ps div n Center the first positive going edge of the signal approximat...

Page 55: ...ose the Time Histogram n Press WINDOW MARKER I and set it to 980 mV w Press WINDOW MARKER z and set it to 1 V Select the Acquire submenu set the Number of Samples to 1000 and press START ACQUIRING After the data for the time histogram has been acquired Samples lOO select the Result submenu Press INIEAN and SIGMA RECORD the value of sigma The RMS jitter is calculated as follows RMS _ jitter 6sGma F...

Page 56: ... Equipment Needed Digitizing Oscilloscope with Accessories Delay Line 22 ns Power Splitter All cables 50 0 coaxial BNC 122cm 4ft High Power Attenuator Procedure 1 Connect HP 8114A to the Scope as shown tip RI 14A IINDEII TEST I I 1BNC CABLE Equipment Set up for Jitter Test 3 20 Testing the HP g114A ...

Page 57: ... to 10 m Set the VOLTSDIV of channel 4 to 10 mV div w Set OFFSET to 1 V w Select the Timebase menu and set the TIME DIV to 100 ps div I Center the first negative going edge of the signal approximate Delay 38 8 ns n Select the Delta V menu and turn the V markers On n Set the Marker 1 Position to 1 02 V and the Marker 2 Position to 1 00 v n Select the Delta t menu and turn the T Markers On n Set STA...

Page 58: ...t it to 1 02 V n Press WINDOW MARKER 21 and set it to 1 00 V Select the Acquire submenu set the Number of Samples to 1000 and press START ACQUIRING After the data for the time histogram has been acquired Samples 1009 o select the Result submenu Press MEAN and SIGMA RECORD the value of sigma The RMS jitter is calculated as follows RMS _ jitter Gsigma tlta t dn 13 The RMS jitter for pulse width of 5...

Page 59: ... to the Scope as shown HP 81 l4A UNDER TEST HP 54 12 ii FRONT END I 2 3 4T Iooqi RIC 1 ADAPTOR W WE TO BNCADAPTOR Equipment Set up for Delay Jitter Test i 4 2O dBAl7ENUATOR ShwBNC ADAPTOR 2 For calculating the RMS jitter the rise time of the reference signal within a 1 amplitude window is required If this value is not already measured in the Period Jitter test then perform the first 6 steps of the...

Page 60: ... 6 Select the Window submenu and press WINDOW MARKER 1 and set it to 980 mV 7 Press WINDOW MARKER 21 and set it to 1 V 8 Select the Acquire submenu set the Number of Samples to 1000 and press CSTART ACQUIRING 9 After the data for the time histogram has been acquired Samples lOO select the Result submenu 10 Press MEAN and SIGMA RECORD the values of sigma 11 The RMS jitter is calculated as follows R...

Page 61: ...0 mV Baseline 0 V lo0 mV tO 5 of amplitude 1 Digitizing Voltmeter DVM 2 High Power attenuator 3 5061 O l 10 W Feedthrough Calculating out Measurement Uncertainties Measurement uncertainties need to be calculated out as follows a For 5061 into 5061 measurements the Attenuation Factor must be calculated b For HIZ High Z into 5061 measurements the Attenuation Factor Load impedance and Adjust factor m...

Page 62: ...hown in the following illustration Inh OFF 3 __ _ Delay 50 0 s Baselm 0 00V Duty c 15 0 2 flnplitd U 50R into 50 0 2 n Pasit iw t l i 00 II 1m m 1L I M I T S i I CONFIG 11 Configuring the Output Page 2 Connect HP 8114A to the DVM as shown Equipment Set up 1 for Amplitude Test 326 Testing the HP 8114A ...

Page 63: ...0 1 NPLC Number of Power Line Cycles 4 Take the reading as VI 5 Connect HP 8114A to the DVM as shown N TY7t TO BNC ADAPTOR Figure 3 3 Equipment Set up 2 for Amplitude Test 6 Take the reading as Vz 7 Calculate the Attenuation Factor to at least 2 decimal places gl I z Testing the HP g114A 3 27 ...

Page 64: ...r Attenuator to the DVM as shown Connecting the Attenuator to the DVM 2 Set the DVM HP 3458A to Function OHM 3 ke the reading as RI 4 ke the reading for the Coaxial Short Rz as shown COAXv L SHORT SM 4 ii J WA TO BNCADAPTOR BNC tABtt Measuring the Coaxial Short 3 28 Testing the HP g114A ...

Page 65: ...HP 8114A set up the OUTPUT page as shown in the following illustration Configuring the Output Page 7 Set the DVM HP 3458A to Function DCV Trigger TRIG EXT NPLC 0 1 8 Connect HP 8114A to the DVM as shown 9 lhke the reading as V3 Testing the HP 9114A 329 ...

Page 66: ...nnect HP 8114A to the DVM as shown TV iYPtTO ENCAClAPTOR FEEDTHROUGH 0 0 11 l e the reading as V4 12 Calculate the attenuation factor Gz vn G2 7 r 13 Calculate the adjust factor Ad 3 30 Testing the HP 8114A ...

Page 67: ...eline reading as B a 5 Set HP 8114A Delay to 50 ms and Amplitude to 1 V 6 E ethe high level reading as H Q 7 Calculate the Amplitude A5062 H5061 B5od x Gl 8 Repeat steps 3 to 7 for the following settings Amplitude Amplitude limit TR Entrj minimum maximum 1v 0 89 v 1 11 v 6 l 2 v 1 38 v 2 12 v 6 2 5V 4 86 v 5 15 v 6 3 10 v 9 80 v 10 2 v 6 4 20 v 19 7 v 20 3 V 6 5 60 v 49 4 v 50 6 V 6 6 Ihble 3 10 A...

Page 68: ...owing illustration r Per 188MS Out ON IAtannirulI Inh OFF f Delay 50 0 s Baselne 0 00U 5 DutyCyc 15 0 fit iplitd 2 00U IL n I LL 50 0 n Posit iw I II 1 t 1 OUTPUT I I LIMITS I 1 CONFIG 1 I Configuringthe Output Page 3 Set HP 8114A Delay to 0 ns 4 I e the baseline reading as BHIZ 5 Set HP 8114A Delay to 50 ms and Amplitude to 2 V 3 32 Testing the HP 8114A ...

Page 69: ... for the following settings mble 3 11 Amplitude Levels HIZ High Z into 5OQ Amplitude Amplitude limit TR EntrJ minimum maximum 2V 1 88 V 2 12 v 6 7 5V 4 85 V 5 15 v 6 8 10 v 9 80 v 10 2v 6 9 20 v 19 7 v 20 3 v 6 10 60 v 49 4v 50 6 V 6 11 100 v 98 9v 101 1v 6 12 Testing the HP 8114A 3 33 ...

Page 70: ...8 O l 1OW Feedthrough Procedure 1 On the HP 8114A set up the OUTPUT page as shown in the following illustration Configuring the Output Page 2 Connect HP 8114A to the DVM as shown iP 8 II4A IINDER TEST 50 OHM FEEDTHROUGH Equipment Set up 1 for Variable Baseline Test edings for the following baseline settings VB Multiply the r 3 Set the DVM HP 3458A to Function DCV Trigger TRIG EXT AD Converter inte...

Page 71: ...imits l ble 3 12 Baseline Levels Test Elaseline Leve 2 5 v 2 0 v 10 v 5 v 2 v l o v 2v 5v 10 v 20 v 125 v T Li minimum 25 355 V 20 305 V 10 205 v 6 155 v 2 125 V 0 1 0 5 v 1 876 v 4 845 V 9 795 V 19 695 24 645 L mi I ts maximum 24 645 V 19 696 V 9 795 V 4 4 3 5 v 1 876 V 0 106 v t 2 125 V 5 166 v 10 205 I 20 305 I 26 355 1 R Entq 7 1 7 2 7 3 7 4 7 5 7 6 7 7 7 K 7 9 7 10 7 11 I Testing the HP 8114A...

Page 72: ...0 amplitudes 5 V 2 From HIZ High Z into 50R amplitudes lO V Test Specifications Range 7 ns for amplitudes 5 V 5061 into 503 12 ns for amplitudes lO V HIZ High Z into 5OQ Equipment Needed Digitizing Oscilloscope with Accessories High Power Attenuator 3 36 Testing the HP 8114A ...

Page 73: ... to the Scope On the HP 8114A press TRIGGER and set up page as follows 2 On the HP 8114A set up the OUTPUT page as shown in the following illustration fi Per 500 us Out ON iSBBWiMoDlFVl Inh OFF f DLZldY 0 00 r s Baselne 0 00 w Dut yCyc 50 0 fb plitd mu 10 0 50R irk o 50 0 R XL Posit iwe w IlTmizFlTRICiGERIIOUTPUTIILIMITSI Configuring the Output Rage Testing the HP 8114A 3 37 ...

Page 74: ...g while the oscilloscope is in the Delta t menu Press the PRECISE EDGE FIND key 6 Check the HP 8114A rise time at the following leading edge setting able 3 13 Leading Edge Setting mi Test 8 lb Trailing Edge Test Trailing edge for amplitudes 5 V from 5062 into 500 Note 3 The Leading Edge test must be performed before you start this test Procedure 1 Set the Digitizing Oscilloscope HP 54121T I Select...

Page 75: ... the Scope as shown I I 1 M TYPE TO ENCADAPTOR Connecting HP 8114A to the Scope On the HP 8114A press TRIGGER and set up page as follows m r C IT 1 lJ il F i_lL ES n if j rj gi a F lses 2 On the HP 8114A set up the OUTPUT page as shown in the following illustration Configuring the Output Page Testing the HP 9114A 3 39 ...

Page 76: ...ta t menu Press the PRECISE EDGE FIND key 6 Check the HP 8114A rise time at the following leading edge setting lhble 3 15 Leading Edge Setting Test 8 2b Trailing Edge Test Trailing edge for amplitudes lO V from HIZ High Z into 5061 Note The Leading Edge test must be performed before you start this test Procedure 1 Set the Digitizing Oscilloscope HP 54121T m Select the Timebase menu and set TIME DI...

Page 77: ...ure 1 Connect HP 8114A to the Scope as shown HP 8 4A UNDER TEST HP 5412 IT FRONT END Connecting HP 8114A to the Scope On the HP 8114A press TRIGGER and set up page as follows n il ii I W IIJ Pl_lL E n si sgi j plJlscs 2 On the HP 8114A set up the XJTPUT page as shown in the following illustration Per 1 00w out ON Inh OFF f OM001FYI Delay 0 00ns Baselne 0 00v Dut yCyc 50 0 kplitd U 50R into 50 0 R ...

Page 78: ...scope s trace flatness error GaAs input circuit into account 6 Set HP 8114A to Amplitude 5 V 7 Repeat steps 3 to 5 but this time set the Scope to w VARIABLE LEVELS 94 106 and press AUTO LEVEL SET n OFFSET 5 V m VOLTSDIV 200 mV Div m TIMEBASE 20 ns Div 8 Enter the result in the Test Report as TR entry 9 2 2 Preshoot 9 Set HP 8114A to l Period 1 ps l Amplitude 5 V m Baseline 0 V n Delay 50 ns 10 Set...

Page 79: ...11 Check that Preshoot is within the f5 of amplitude 50 mV window 12 Enter the result in the Test Report as TR entry 9 3 Testing the HP 8114A 3 43 ...

Page 80: ...Records Test Facility Report No Date Customer Tested By Model Serial No Options HP 8114A lOOV 2A Pulse Generator Ambient temperature 0 7 G Relative humidit y Firmware Rev Line frequency Special Notes Hz 3 44 Testing the HP 8114A ...

Page 81: ... Description Model No Trace No Cal Due Date 1 Oscilloscope HP 54121T 2 Counter HP 5334B 4 Digital Voltmeter HP 3458A 3 Pulse Generator HP 8112A 5 Delay Line HP 54008A 6 7 8 9 10 Il 12 13 14 15 18 Testing the HP 8114A 3 45 ...

Page 82: ...Test Results for HP 8114A Pulse Generator Serial No Ambient temperature Customer Relative humidity CSO Line frequency Tested by Date C HZ Comments 3 46 Testing the HP 8114A ...

Page 83: ... ns 474 9 ns l 4 1 pcls 949 9 ns 1 5 5 uLs 4 7511s 1 6 50 ps 47 5 ps 1 7 500 ps 475 ps l 8 5 ms 4 75ms l 9 50 ms 47 5 ms 1 10 500 ms 475 ms 525 1ns __ 1050 1 ns 5 25 ps 52 5 ps 5 2 5 ps _ _ 5 25 ms 52 5 ms 525 ms Period Jitter Scope Uncertainty factor TR Entry Test 5 1 1 100 ns Actual Result Limit Maximum 75 ps Pass Fail 5 1 2 500 ns 175 ps Testing the HP 8114A 3 47 ...

Page 84: ...S 949 5 ns 2 6 5 ps 4 75 ps 2 7 50 ps 47 5 ps 2 8 500 ps 475 ps 2 9 5 ms 4 75 ms 2 10 50 ms 47 5 ms 2 11 500ms 475 ms Limit Pass Fail Maximum 11 0 ns 53 0 ns 105 5 n s 525 5 ns Limit Pass IS1 Maximum 1 0 5 0 5 ps __ 5 2 6 ps _ _ 5 2 5 ps 5 2 5 ps 5 25 ms 52 5 m s 5 2 5 m s _ _ Width Jitter Scope Uncertainty factor TR Entry Test Actual Limit Pass Fbil Result Maximum 5 2 1 50 ns 50 ps 5 2 2 500 ns 1...

Page 85: ...00 ns 474 ns 526 ns Counter Uncertainty factor TR Entry Test Limit Actual Limit Pass hi1 Minimum Result Maximum 3 7 lps 949 ns 1051 ns 3 8 5 P 4 749 ps 5 251 ps 3 9 50 ps 47 5 ps 52 5 ps _ _ 3 10 500 475 ps 525 ps 3 11 5 ms 4 75 ms 5 25 ms 3 12 50 ms 47 5 ms 52 5 ms 3 13 500ms 475 ms 525 ms _ _ Delay Jitter Scope Uncertainty factor TR Entry Test Actual Limit Pass Fhil Result Maximum 5 3 1 50 ns 50...

Page 86: ...ass Fhil Maximum 21 25 ns 52 75 ns 105 25 ns TR Entry Test Limit Actual Limit Pass Fhil Minimum Result Maximum 4 4 500 ns 474 75 ns 4 5 1 ps 949 75 ns 4 6 5 ps 4 759 is 4 7 5 0 pus 47 5 ps 4 8 5 0 0 ps 475 is 4 9 5 m s 4 75 ms 4 10 50 ms 47 5 ms 4 11 500 ms 475 ms 525 25 ns 1050 25 AS __ 5 2 5 ps 5 2 5 ps _ _ 5 2 5 ps _ _ _ _ 5 25 ms 5 2 5 m s _ _ 5 2 5 m s _ _ MO Testing the HP 8114A ...

Page 87: ... 9 80 V 10 2 V 6 5 20V ___ 19 7 v 20 3 v _ _ _ _ 6 6 5ov _ _ _ _ _ 49 4 v 50 6 V Amplitude FiIZ into 500 TR Entry Test Measured Calculated Amplitude Amplitude limits Pass Fail bUZ Hmz Hmz Bmz x Gz Ad Minimum Maximum 6 7 6 8 6 9 6 10 6 11 6 12 2 v by 1 88 v 2 12 v _ _ 6V ___ 4 85 V 5 1 5 v _ _ _ _ 10 v ___ 9 80 V 10 2 v 20 v ____ 19 7 v 20 3 V 5 o v ___ 49 4 v 5 0 6 V _ _ _ _ 100 V 98 9 V 101 1 v T...

Page 88: ...ss Fhil VB B VB x G1 Minimum Maximum 7 1 7 2 7 3 7 4 7 5 7 6 7 7 7 8 7 9 7 10 7 11 25 V 25 355 V 24 645 V 20 v 20 305 V 19 695 V 10 v 10 205 V 9 795 v 5 v 5 155 v 4 845 V 2 v 2 125 V 1 875 V f0 v 0 105 v 0 105 v 2 v t1 875 V 2 125 V _ _ _ _ 5v 4 845 V t5 155V _ _ 10 v t9 795 v 10 2005 20 v 19 695 V 20 305 V _ _ _ _ 25 V t24 645 V t25 355 V 3 52 Testing the HP g114A ...

Page 89: ... V from 500 into 503 TR Entry Test Actual Result Limit Pass Fail Maximum 8 lb Trailing 7 ns Leading Edge for Amplitudes lO V from HIZ High Z into 503 TR Entry Test Actual Result Limit Pass Rail Maximum 8 2a Leading 12 ns __ Trailing Edge for Amplitudes lO V from HIZ High Z into 5OfI TR Entry Test Actual Limit Pass Fail Result Maximum 8 2b Trailing 12 ns Testing the HP 8114A 3 53 ...

Page 90: ...ot and Ringing Scope Uncertainty factor TR Entry Test Acceptable range Pass Fttil Y 1 25 V 5 of ampl k5OmV 9 2 5 V 315 of ampl 50mV Preshoot TR Entry Test Acceptable range Pass FXl 9 3 0 V 3 5 of ampl 450mV 3 54 Testing the HP 8114A ...

Page 91: ...therwise noted The instructions can also be used to provide the steps needed for retrofitting subassemblies A flowchart shows the order of steps needed to get to a specific part of the instrument Warning Do not open the instrument before the AC line power cord is disconnected The output voltages and the voltages in the primary section of the power supply can be dangerous to life ESD Protection A A...

Page 92: ...bly back into the instrument after removal for any reason To remove a faulty subassembly and fit a new working one To take any subassembly working or not out of the instrument To attach a subassembly to the instrument in this case to provide function s that were not fitted to the instrument when it was purchased The Tools You Need The following tools enable all fixings to be removed and replaced w...

Page 93: ...er supply slide is removed On the power supply slide the power supply unit power supply fan and the optional variable baseline is mounted The power supply slide is is removable or refittable at the rear panel side The Standard HP 8114A contains n Power Supply Unit n MPU board I Timing board n Output board In addition the instrument may have been optionally fitted with or retrofitted with the follo...

Page 94: ... until all the screws have been inserted and partially tightened This helps to avoid flexing the board by securing it unevenly Diagrams show where the fixing screws are located but depending on the options fitted to the instrument you are working on the diagrams may not be identical For example some HP 8114A versions have the BNC connectors on the rear panel while others have the BNC connectors on...

Page 95: ...LE Figure 4 2 Removing the Carrying Handles 3 Remove the two screws securing the cover to the chassis Figure 4 3 shows their position COVER FIXING SCREWS I REAR FEEi Figure 4 3 Rear Panel View Showing Cover Fixing Screws 4 Slide the cover about 10 mm back from the front panel 5 Remove the cover by bending the cover sides away from the chassis and lifting the cover up Refitting the Instrument Cover...

Page 96: ...r right hand side corner at the rear panel close to the fuse then pull the power supply slide out of the chassis Figure 4 4 shows the lever point at the rear panel b y b y FIXING SCREWS FIXING SCREWS Figure 4 4 Figure 4 4 Rear Panel View Showing the Lever Point for the Screw Driver Rear Panel View Showing the Lever Point for the Screw Driver FANNO _ owEa SUP LY SECURING SCREWS Figure 4 5 Power Sup...

Page 97: ...0 mm to release the board from a guiding spacer then lift the board away Please make sure that the switching rod is released from its guides in the power supply slide at the connector side Refitting the Power Supply 1 Refitting the power supply is the reverse procedure of removal Please note the following Note The power supply board has to be carefully fitted in between the two guiding spacers clo...

Page 98: ...emoving the Power Supply 2 Remove the 4 screws at the bottom of the power supply slide securing the variable baseline module to the slide 3 Remove the variable baseline module Refitting the Variable Baseline 1 Refitting the variable baseline is the reverse procedure of removal Note 3 The variable baseline module has two holes at the bottom below the connector These holes have to fit onto the two s...

Page 99: ...y s primary section shielding Gently bend back the lip of the shielding to release it from the metal nose then pull the shielding gently up and lift it away 3 Disconnect the fan cable 5403 4 Remove the 4 screws securing the fan to the rear panel Remember the guidance of the cable for refitting the fan Keep the four clips and screws in a safe place for refitting the fan again 5 Remove the fan by ge...

Page 100: ... reverse procedure of removal Please note the following Note Use the four clips p n 1535 5036 to secure the fan with the 4 screws p n 0624 0267 to the rear panel The air flow indicator arrow of the fan p n 3160 0510 has to point to the outside of the instrument 4 10 Disassembly and Reassembly ...

Page 101: ...er side of the tunnel where the power supply is mounted See Figure 4 8 1 Before removing the microprocessor board the cover and power supply have to be removed So follow the instructions for Removing the Instruments Cover and Removing the Power Supply first Figure 4 9 Top View Showing the Microprocessor Securing Screws Disassembly and Reassembly 4 l 1 ...

Page 102: ...cessor board is the reverse procedure of removal Please note the following Note The microprocessor board is mounted with the non component side pointing up to the top of the instrument Gently slide the microprocessor board connector int o the motherboard connector make sure that the board is guided by the two horizontal spacers which are mounted in the rear part of the tunnel close to the motherbo...

Page 103: ...to the chassis See Figure 4 10 3 Disconnect the three cables which are close to the front panel 4 Disconnect the two cables which are close to the rear panel 5701 on the timing board and J402 W701 on the output board 5 Slide the timing board back for about 10 mm to release the board from its connection to the motherboard 6 Remove the timing board Refitting the Timing Board Refitting the timing boa...

Page 104: ...which is close to the front panel 5 Disconnect the fan cable 5102 6 Disconnect the output cable 5601 7 Disconnect the two cables close to the rear panel W401 5701 on the timing board and 5402 on the output board 8 Remove the 2 screws securing the holder of the transistors Q801 to Q804 to the chassis the holder is placed between the fan and the hybrid modules 9 Remove the screw securing the coil L6...

Page 105: ...Remove the 2 screws securing the power load resistor R601 to the chassis The power load resistor is located close to one hybrid stage See Figure 4 12 12 Remove the 7 screws securing the output board to the chassis See Figure 4 11 13 Lift the output board up at the fan at the front panel side and pull it out towards the front panel side Disassembly and Reassembly 4 15 ...

Page 106: ...le guiding shield p n 08114 23101 into place and secure it with the 2 screws Information to the Replacement Output Board The replacement output board is delivered with an additional hybrid module guiding shield which is only required for transportation of the replacement board or if the original guiding shield is broken when removed Cut and remove the tie wrap which secures the coil to the board d...

Page 107: ...ver 2 Remove the 1 screw securing the fan and its holder to the chassis See Figure 4 13 3 Disconnect the fan cable 5102 on the output board 4 Push the fan a little bit towards the front panel at the timing board side and pull it out of the guides in the chassis Refitting the Output Board F an Refitting the output board fan is the reverse procedure of removal Disassembly and Reassembly 4 17 ...

Page 108: ...Removing the Microprocessor Board and Removing the Timing Board first 2 Remove the side strips from the front panel to reveal the sec u ing screws See panf 3 Remove the 4 screws securing the front panel to the chassis 4 Release the front panel from the chassis for about 10 cm 5 Disconnect the ribbon cable connecting the front panel to the motherboard 6 Disconnect the 2 cables from the memory card ...

Page 109: ...ally tightening the 7 screws which secure the motherboard t o the chassis it is recommended to first connect the microprocessor board and the timing board to the motherboard to align the connections and then tighten the screws Remember to fit the RF1 Shield Part No 8160 0662 between the 37 pin D connector and the chassis Disassembly and Reassembly 4 19 ...

Page 110: ...e output board fan 4 Remove the screw securing the memory card connector board to the chassis The screw is located at the outside of the chassis See Figure 4 15 5 Remove the two screws securing the memory card connector board to the metal holder Refitting the Memory Card Connector Board Refitting the memory card connector board is the reverse procedure of removal Pleae note the following Note Inse...

Page 111: ... connected to the Motherboard connector on the front of the chassis 4 Remove the Front Panel The replaceable subassemblies of the Front Panel are n Ribbon cable connecting the Front Panel to the Motherboard n Ribbon cable connecting the RPG module to the Display module w Display module n RPG module m RPG knob m RPG Head unit n Key pad retaining panels n Key pad flexible connector m Large Key pad n...

Page 112: ...the PC board from its support clips starting with the clips at one corner of the board and working along the board raising it slightly as each clip is released Move the clips just sufficiently to release the board 2 When both ends of the board and one side have been released from the clips the board can be slid out from the clips on the remaining side Caution 0 Do not use excessive pressure on PC ...

Page 113: ...e and small Key pads are shown still in position on the frame FRONT FRAME 08 I 14 64201 CONNECTOR C 08114 46501 RPG i KNOB E2900 47401 1 I RPG HE Q UNfT RIBBON C WI KJT NO 09600865 OE I 14 66507 ___ 08 I I 06 160 I CABLE ASSEMBLY i ___ 08 I I O 6 I 603 CABLE ASSEMBLY r j _ __ Figure 4 18 Front Panel Subassemblies Disassembly and Reassembly 4 23 ...

Page 114: ...connect the cable going from the RPG module to CNl on the Display module c Disconnect the Ribbon cable from 53 This cable connects to the Head unit and is folded under the RPG module and trapped there to accommodate the length of the Ribbon cable d Slide the cover of 52 toward the large Key pad to release the flexible connector and remove the connector from 52 e Release the module from its plastic...

Page 115: ...C Boards from Plastic Support Clips 10 Small Key pad a Holding the rubber Key pad at each end lift the Key pad clear of the Front Panel frame disengaging the keys from their cut outs and the locating posts see How to Remove PC Boards from Plastic Support Clips 11 Front Panel Legend foil Be sure that you want to remove the Front Panel foil as it is extremely unlikely that you will be able to refit ...

Page 116: ...extra length before fitting the RPG module Allow just sufficient cable showing at the top of the unit to connect tidily with 53 on the RPG module which then fits over the Head unit holding the folded cable in position b Secure the unit to the Front Panel frame using the 12mm nut and washer Take care not to over tighten the 12mm nut as the mounting bush may be damaged c Press the knob firmly onto t...

Page 117: ...he protective backing sheet d Carefully lower the free end of the foil to the Front Panel frame and smooth it into firm contact Avoid the inclusion of air bubbles by smoothing the foil from the centre toward the end of the Front Panel frame The adhesive is immediately effective and the foil cannot now be moved e Remove the adhesive tape and the remaining half of the foil protective backing sheet a...

Page 118: ......

Page 119: ...T The Through Hole boads can be repaired down to component level if required In down to component level repairs it is recommended to use the component level information package p n 08114 91031 The following table lists HP 8114A boards stating whether they are standard or optional and the component mounting method able 5 1 Field Repair Level of HP 8114A Boards This chapter begins with Selftest proc...

Page 120: ...96 can be assumed This is because not all possible settings and functions are checked by the Performance Tests Microprocessor Selftest Failure Messages The following is a list of the Microprocessor Board error messages and their meanings The first part of the list shows the messages as they are displayed on the instrument The HP IB messges are identical but with the message 330 Self test failed ad...

Page 121: ...ot automatically run at power up You can start this part of the Selftest routine as follows 1 2 3 4 5 6 Switch the instrument ON Wait for the Microprocessor Selftest to finish Press MORE and CONFIG 1Jsing the cursor keys move the highlight down to Perform Self test Using the knob select Signal Press ENTER Timing Board Selftest Figure 5 1 shows the Selftest points on the Timing Board This is follow...

Page 122: ... in TRIGGER OUTPUT circuitry Selftest cannot find a signal after the Trigger Output amplifier Output Board Selftest Figure 5 2 shows the Selftest point on the Output Board followed by a list of the possible failure messages TP MB SIGNOUT I POSlNEG ENlDlS ____ __ u FLVAR VAR BASELINE if Opt 001 is installed Figure 5 2 Testpoint used in Output Board Selftest Output Board Selftest Failure Messages Th...

Page 123: ...ment appears t o be dead are above t he dotted line If these tests do not solve the problem continue with the t ests below the dotted line If these tests do not lead to a section containing information that does solve the problem look in the text in this chapter for a heading that might apply to the fault Figure 5 3 getting Started with Troubleshooting the HP 8114A Troubleshooting information for ...

Page 124: ...rd showing voltage test points at the lower left corner In the diagram the double dashed line across the board divides the Primary and Secondary Sections of the Power Supply PRIMARY SECT ON SUPPLY BOARD 1 1008l14 66504 I SECONDARY SECTION ll5VFL Figure 5 4 The Power Supply Board 5 6 Troubleshooting ...

Page 125: ...ing up is needed Figure 5 5 shows what the setup looks like when you are ready to start You need the following equipment 1 The main chassis of the HP 8 114A 2 An isolating mains transformer 3 An Oscilloscope with grounding to the mains earth 4 A High impedance Voltmeter 5 A 10062 resistor 5W 6 A 300 resistor 2W First remove the Power Supply Board mounted on a slide Place the PC Board in front of y...

Page 126: ...1 Disconnect mains power and check that the fans are physically OK that is free from damage or obstruction 2 Using an Ohmmeter check for 1 fl continuity the main fuse FH401 inductor T400 switch S401 filter MP123 and the mains cable including any fuse fitted in the power plug SCR Q401 suppresses low impedance voltage peaks on the supply line If this SCR fails it may not be immediately noticeable bu...

Page 127: ...inst FLTGND at testpoint TP9 lhble 5 3 Floating Power Supplies Supply Voltage Typical Measurement 12 VFL 12 v 5 VFL 5 1 v 10 VFL 10 5 v 17 VFL 17 1 v 115 VFL 144 v 2 Check the ACV OFFS voltage across the resistor R471 The voltage should typically read 66 V Troubleshooting 5 9 ...

Page 128: ...essor clock line and incorrect setting or a faulty switch section disables the Microprocessor If faults are suspected in connection with the HP IB Interface check the ribbon cable that joins the HP IB socket to the Microprocessor Board Using a resistance meter check for continuity along each of the ribbon cable conductors Dividers U28A and U28B divide the system clock to produce a clock for the HP...

Page 129: ... Check that when the knob is rotated signals are present at the input pin 9 and at the output pin 8 of 1J43C and at the input pin 12 and at the output pin 11 of 1J43D Reset At switch on U13 pin 16 goes high It then goes low after approximately 100 ms and remains low until a subsequent reset If the Microprocessor Board passes all the above checks and still does not function its repair is outside th...

Page 130: ...spect devices However basic checks can be performed on some parts of the circuitry Supply Voltages Check whether the power supply voltages are present on the board Measure against AGND at the positive pole of capacitor C109 FLGND 5 VFL I _ _ _ I WING BOARD EY Figure 5 6 Supply Voltages Testpoints on the Timing Board 5 l 2 Troubleshooting ...

Page 131: ...supply voltages 1 U407 pin 1 for 12 V and 1J407 pin 3 for 5 V 2 U402 pin 2 for 12 V and U402 pin 3 for 5 2 V Check the current sources for the period generator 1 Check pin 3 of U406 voltage regulator for 12 V 2 Check pin 2 of U406 for 8 V 3 Varying the frequency from 1 01 MHz to 10 0 MHz the voltage at pin 1 of U404A should vary from 0 5 V to 5 0 V 4 Check for the following voltage drops across R4...

Page 132: ...2 V and U602 pin 3 for 5 2 V Check the current sources for the width generator 1 Varying the width from 10 0 ns to 99 9 ns the voltage at pin 7 of U504B should vary from 5 2 V to 0 5 V 2 Check for the following voltage drops across R602 mble 5 9 Voltage Drops Across R602 Edge Interface 1 Set standard setting by pressing ISHIFT STORE Recall TJ 2 Check at U702 pin 13 for an ECL signal high level at ...

Page 133: ... to inhibit mode I l 1 C H in the OUTPUT page 2 Enable the output by pressing SHIFT ON OFF 3 Apply a t 5 Vdc signal to the INH INPUT 4 Check with an oscilloscope that the output is inhibited when the external inhibit signal is applied 1 Check at junction R801 and R802 for a signal with 50 duty cycle and EECL levels high level at 0 0 V low level at 0 7 V 2 Check at the collector of Q801 for a 50 du...

Page 134: ...cuitry To make measurements on the output board the hybrid module guiding shield has to be removed Floating voltages up to 145 V are present This can be dangerous to life Care should therefore be taken during the measurements Check the power supplies re generated on the output board F ixed Supply At TP109 there should be 5 VANA measured against AGND at Cl 19 Floating Supplies Measure the floating ...

Page 135: ... I 9 HYEjRlDS 1 I r O U T P U T B O A R D NO081 14 66506 5 VREFFL 2 HYiRIDS 5 VFL L 6 HYBRIDS 1 _1 Figure 5 7 Testpoints for the Floating Voltages Jhble 5 10 Floating Supply Voltages on the Output Board Troubleshooting 5 17 ...

Page 136: ...here are four hybrid groups each controlled by a DAC Different hybrid groups are active or switched off in the 6 amplitude ranges Following table shows in which amplitude range which output voltage is present at which DAC lhble 5 11 4 99 v 0 0 v 0 0 v 1 06 V 0 0 v 5 00 v 0 0 v 0 0 v 0 71 v 0 71 v 7 99 v 0 0 v 0 0 v 1 12 v 1 13 v 8 00 v 0 0 v 0 57 v 0 0 v 0 0 v 15 99 v 0 0 v 1 12 v 0 0 v 0 0 v 16 0...

Page 137: ...tput 4 The signal output should be a 0 0 V signal 5 Set the output amplitude to 2 69 V 6 Mount hybrid number 1 in its socket 7 A negative pulse with an amplitude of 2 69 V should be monitored 8 Set the output amplitude to 4 99 V 9 Mount hybrids number 2 and 3 in their sockets 10 A negative pulse with an amplitude of 4 99 V should be monitored 11 Set the output amplitude to 15 99 V 12 Mount hybrids...

Page 138: ...ve pulse with an amplitude of 50 0 V should be monitored Variable Floating Supply UFLVAR Check UFLVAR at the emitter of SO2 in the 50 0 into 50 s2 mode with variable baseline of 0 0 V and in negative pulse mode able 5 12 Variable Floating Supply UFLVAR Ei Relays 1 Check for switching noise when toggling the relays 2 If all relays don t switch the relay driver 17601 may be defective 5 20 Troublesho...

Page 139: ...e Guide Variable Baseline Option 001 There are no recommended troubleshooting procedures available If the fault can be localized on the variable baseline module replace the module with a new module Troubleshooting 5 21 ...

Page 140: ...t info V Local message device dependent info Description An unrecognized command or data type was encountered for example a string was received when the device does not accept strings Invalid suffix HP IB message Channel out of range Local message Channel out of range Description The channel suffix given with a channel sensitive command is out of range Character data not allowed HP IB message No M...

Page 141: ...ssage No signal detected at CLK INput Description An attempt was made to measure the external clock frequency but no signal was detectable on the clock in connector Execution error HP IB message Frequency at CLK INput too low Local message Frequency at CLK INput too low Description An attempt was made to measure the external clock frequency but the detected signal frequency was too low to allow an...

Page 142: ...switch the display ON while security was on Trigger ignored HP IB message Trigger signal ignored Local message MANUAL key ignored Description The MANUAL trigger function is not supported by all modes The TRG or GET HPIB commands have the same functionality as the MANUAL key 221 Settings conflict HP IB message Width period Local message Width period Description 221 Width exceeds period Settings con...

Page 143: ...o width limits in external width mode Settings conflict HP IB message Double pulse max dutycycle 7 percent if amplitude 20V Local message Double pulse max dutyc 7 percent if amp1 2OV Description In Double pulse mode maximum dutycycle is 7 percent if the amplitude is over ZOV because of power problems Data out of range HP IB message Parameter out of hard limits Local message Parameter out of hard l...

Page 144: ...n a parameter is outside its hardware limits Data out of range HP IB message lot Wrong Location Nr allowed lot range Local message lot Wrong Location Nr lot range Description lot location number lot range location range Data out of range HP IB message BURSTXNT RANGE Local message BURST of 2 to 65536 Data out of range HP IB message PERIOD RANGE Local message Per 66 7 ns to 999 ms 999 s with PLL Dat...

Page 145: ...IB message LOL AMP RANGE Local message Low level 2 000 A to 1 998 A Data out of range HP IB message HIL LIM VOLT RANGE Local message High V Limit 49 0 V to 50 0 V Data out of range HP IB message LOL LIM VOLT RANGE Local message Low V Limit 50 0 V to 49 0 V Data out of range HP IB message HIL LIM AMP RANGE Local message High A Limit 1 998 A to 2 000 A Data out of range HP IB message LOL LIM AMP RAN...

Page 146: ...PUT High Level Low Level Local message OUTPUT High Level Low Level Data out of range HP IB message OUTPUT High V limit Low V Limit Local message OUTPUT High V Limit Low V Limit 2 2 2 Data out of range 2 2 2 2 2 2 HP IB message OUTPUT High A Limit Low A Limit Local message OUTPUT High A Limit Low A Limit Data out of range HP IB message OUTPUT High Level High Volt Limit Local message OUTPUT High Lev...

Page 147: ... Current Data out of range HP IB message OUTPUT High Level V close abs limit Local message OUTPUT High Level V close abs limit Data out of range HP IB message OUTPUT Low Level V close abs limit Local message OUTPUT Low Level V close abs limit Data out of range HP IB message OUTPUT High Level A close abs limit Local message OUTPUT High Level A close abs limit Data out of range HP IB message OUTPUT ...

Page 148: ...close low limit Data out of range HP IB message OUTPUT Low Level Low Voltage Limit Local message OUTPUT Low Level Low Voltage Limit Data out of range HP IB message OUTPUT Low Level Low Ampere Limit Local message OUTPUT Low Level Low Ampere Limit Data out of range HP IB message OUTPUT can t achieve High level Local message OUTPUT can t achieve High level Data out of range HP IB message OUTPUT can t...

Page 149: ...A width Data out of range HP IB message OUTPUT Conflict Amp1 V ext width Local message OUTPUT Conflict Amp1 V ext width Data out of range HP IB message OUTPUT Conflict Amp1 A ext width Local message OUTPUT Conflict Amp1 A ext width Data out of range HP IB message Can t talc Delay PERIOD UNKNOWN Local message Can t talc Delay PERIOD UNKNOWN Data out of range HP IB message Can t talc Phase PERIOD UN...

Page 150: ...ge HP IB message Delay too small Local message Delay too small Data out of range HP IB message Double delay too small Local message Double delay too small Too much data HP IB message device dependent info Local message device dependent info Description An unrecognized command or data type was encountered for example a string was received when the device does not accept strings Illegal parameter va...

Page 151: ... has not been installed Mass storage error HP IB message Specified drive not found Local message Specified drive not found Mass storage error HP IB message Drive A Memory Card error Local message Drive A Memory Card error Description Internal Error Mass storage error HP IB message Drive A Can t load more Subdirectories Local message Drive A Can t load more Subdirectories Description The maximum in...

Page 152: ...emory Card full Local message Drive A Directory full Description The root directory is full File name not found HP IB message Drive A File Name on Memory Card not found Local message Drive A File Name not found Description The ordered file or directory does not exist File name not found HP IB message Drive A File sizes don t match Local message Drive A File sizes don t match 1 Description The size...

Page 153: ...HP IB message Drive A Memory Card battery is low Local message Drive A Memory Card battery is low Description The battery of the Memory Card should be replaced Device specific error HP IB message OVERVOLZ4GIiX Output disabled Local message OVERVOLXAGE Output disabled Description The output was disabled by the overvoltage protection circuitry automatically Device specific error HP IB message Output...

Page 154: ...em on the output board System error HP IB message Driver complains after parameter restore from core Local message Error after parameter restore from core Description A hardware driver returned an error after the total restore of all instrument parameters to the last known to be in good state A possible cause for this error is a hardware fault System error HP IB message CHECk OFF not allowed use R...

Page 155: ... message Pattern block corrupt set to RST state Local message Pattern corrupt set to RST Description The signature check performed on the instruments pattern block at power up failed Possible reasons are w The instrument was switched off during a parameter update H The battery used to buffer the instruments RAM is empty m The instruments RAM is defective SAVe recall memory lost HP IB message rem l...

Page 156: ...al no number input The error check switch in the specified setting is OFF but the internal error check is ON The instrument cannot recall this setting SAVe recall memory lost HP IB message rem lot Setting no Instrument configuration incompatible Local message rem lot Setting no Config incompatible Description rem lot remote or local no number input Every stored setting contains the instrument conf...

Page 157: ...m an internal voltage reference Normally the external crystal frequency is VCO reference Selftest failed HP IB message VCOfor UP has not locked Local message VCO for UP has not locked Description The VCO is enabled but has not yet locked Normally the VCO would have locked on to the desired frequency Selftest failed HP IB message Unexpected Reset of UP Local message Unexpected Reset of UP Descripti...

Page 158: ...elftest failed HP IB message SELFTEST INSTALLED BOARDSOK Local message SELFTEST INSTALLED BOARDS OK Selftest failed HP IB message SELFTEST FAILED Local message SELFTEST FAILED Selftest failed HP IB message Failure in PERIOD circuitry Local message Failure in PERIOD circuitry Description The Period TIGER IC may be defective Selftest failed HP IB message Failure in DELAY circuitry Local message Fail...

Page 159: ... No output signal PERIOD TIGER Local message No output signal PERIOD TIGER Description An output signal cannot be found by the selftest following the period circuitry Selftest failed HP IB message Failure in TRIGGER OUTPUT circuitry Local message Failure in TRIGGER OUTPUT circuitry Description An output signal cannot be found by the selftest for the TRIGGER OUTPUT AMPLIFIER The file Header isn t r...

Page 160: ...ER 0 Set when inst has completed all pending operations 7 Set to indicate that instrument has powered up PERATION STATUS REGISTER 1 Set when inst starts changing its output signals 1 Cld when inst finishes changing output signals 2 Set when inst starts changing its range 2 Cleared when inst finishes changing its range 4 Set when inst starts a frequency measurement 4 Cld when inst finishes frequenc...

Page 161: ...uble pulse may reach next period Width Seconds user limit Width Dutycycle user limit High Level V close to absolute limit Low Level V close to absolute limit High Level A close to absolute limit Low Level A close to absolute limit Amplitude V close abs high limit Amplitude V close abs low limit Amplitude A close abs high limit Amplitude A close abs low limit Ampl V too great for Width Dtycycl Ampl...

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Page 163: ... Boards able 6 2 Board Original Bd Number Replacement Bd Number Microprocessor 08114 66503 08114 66503 Power Supply 08 114 66504 08 114 66504 Timing 08114 66505 08114 66505 Output 08114 66506 08114 66506 Variable Baseline Board 1 08114 66541 08114 66541 Variable Baseline Board 2 08114 66542 08114 66542 Replaceable Parts 6 1 ...

Page 164: ... 65202 M P 5 38114 40202 7 1 PNL FRNT 28480 08114 40202 M P 6 38114 04101 9 1 COVER 28480 08114 04101 MP8 38114 01204 7 1 BRACKET FAN 28480 08114 01204 MP9 08 114 00602 7 1 SHIELD MEMORY 28480 08114 00602 MPlO 1400 1208 3 1 CLAMP CABLE 06397 TY8 HlS MPll 3050 1389 0 1 WASHER FL MTLC 10773 BN670 M3 MP12 1251 7999 4 1 DUST COVER 04068 MP16 1535 5036 8 8 OEM 28480 MP17 0624 0267 5 8 SCR TPG 6 20 0113...

Page 165: ...ULATOR 28480 18114 05401 1 HEAT SINK 28480 18114 01111 MP102 08114 23101 9 1 GUIDE HYBRID 28480 MP103 08114 22304 2 1 HOLDER BALUN 28480 MP107 8120 1689 7 I 5000 CA ASSY 08674 MPllO 08114 91012 4 1 USER GUIDE 28480 MPlll 5040 938 1 9 1 PAD CORRUGATED 28480 MPl12 7250 0042 8 1 HARD WOOD 12256 MPl13 9220 4582 8 2 PAD FOAM 12506 MP114 9220 4583 9 2 PAD FOAM 12506 MPl15 9211 5933 6 1 CTN CORR RSC 0613...

Page 166: ...114A lCN 8114A OB2 8114A lCR E2900 47401 0 MOUNT HANDLE 28480 8114A lCP 0 HANDLE KIT 28480 8114A lCN 0 ADD MANUAL 28480 8114A OB2 0 RACK SLIDE 28480 8114A lCR 9 1 KNOB RPG CURSOR 28480 E2900 47401 0960 0865 1 1 OPT ENDCR 01542 HRPG AD32 llC 08114 61601 4 1 CBL AY EXT IN 28480 08114 61601 08114 61602 5 1 CBL AY INH IN 28480 08114 61602 08114 61603 6 1 CBL AY TRIG OUT 28480 08114 61603 08114 61604 7...

Page 167: ...he complete Component Level Information Package for the HP 8114A and its modules is not part of this Assembly level Service Guide It can be obtained seperately by ordering HP Part Number 08114 91031 Component Level Information Package A l ...

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Page 169: ... Results 3 16 Duty cycle 2 7 Error Messages 5 2 Error Messages complete list 5 22 ESD 4 1 Exchange boards 6 1 Extended Selftest 5 2 Fan Location Output board 4 17 Refitting Output board 4 17 Refitting Power supply 4 10 Removing Output board 4 17 Removing Power supply 4 9 Feedthrough Termination 50 0 10 w 3 3 Firmware update Procedure l 6 Fixed Supply Voltages 5 g Floating Supply Voltages 5 9 Front...

Page 170: ...numbers 3 3 L Line filter 4 7 M Memory card connector board Refitting 4 20 Removing 4 20 Memory Sizes 1 8 Microprocessor board Refitting 4 12 Removing 4 l 1 Troubleshooting 5 10 Motherboard Refitting 4 19 Removing 4 18 0 Operating Environment 1 4 Option 001 Upgrade 1 5 Output board Refitting 4 16 Removing 4 14 Overheating l 3 P Performance Test Feedthrough Termination 3 3 Performance Test Records ...

Page 171: ...nel 4 21 Front panel Legend Foil 4 25 Front panel subassemblies 4 24 Instrument cover 4 5 Key pad flexible connector 4 25 Key pad large 4 25 Key pad retaining panels 4 24 Key pad small 4 25 Memory card connector board 4 20 Microprocessor board 4 11 Motherboard 4 18 Output board 4 14 Output board fan 4 17 Power supply 4 6 Power Supply Fan 4 9 Rear feets 4 5 RPG head unit 4 24 RPG knob 4 24 RPG modu...

Page 172: ...Test Equipment list 3 2 Testing 3 1 Test Records 3 44 Tests Amplitude 3 25 Delay 3 10 Delay Jitter 3 23 Double Pulse Delay 3 13 Jitter 3 17 Leading Edge 3 37 3 39 Overshoot and Ringing 3 42 Period 3 5 Period Jitter 3 17 Preshoot 3 42 Pulse Aberration Test 3 41 Trailing Edge 3 38 3 40 Transition Time 3 36 TT 3 36 Variable Baseline 3 34 Width 3 7 Width Jitter 3 20 Thermal Protection l 3 Timing board...

Page 173: ...iming board 5 12 Variable baseline Opt OOl 5 21 U IJpgradc Option 001 Variable Baseline l 5 v Variable Baseline IJpgrade l 5 Variable Baseline Option Refitting 4 8 Removing 4 8 Ventilation l 3 Verification Tests 3 1 W Warning messages 5 43 Weight 2 1 Width Test 3 8 Width Test Results 3 9 Index 5 ...

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Page 175: ...r 8 114A Manual printed on Dec 1994 1 O Manual Part Number 081 Id 91021 Check the following table for your instrument serial prefix serial number EDC and make the listed changes to your manual New Item Serial Prefix or Serial Number Manual Changes ERRATA 3330600821 1 3330600826 2 2 September 1997 Page 1 of 6 ...

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Page 177: ...on 001 is fitted High Impedance can only be selected when the baseline is set to zero Page Z 5 Pulse Performance Overshoot Preshoot Ringing change to read 5 of amplitude 1OOmV Page 2 5 Pulse Performance Settling Time change text to lOO ns typical This means for pulses 100 ns wide the amplitude specification is modified by the overshoot and ringing specification i e effectively 6 of amplitude 150 m...

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Page 179: ...periods 7 5 us the maximum is 95 of period width Page 2 11 Inhibit Input Change threshold spec to TTL compatible Section 3 Testing the HP 8114A Pages 3 77 20 23 27 29 30 31 32 34 37 39 and 41 Identify the connectors of the high power attenuator the end connected to the 8 114A should be marked IN and the other end OUT Page 3 28 Identify the connectors of the high power attenuator the end connected ...

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Page 181: ...MODEL 8114A ____ ______ __ __ ____ _______ _ _ CHANGE TO NEW SERIAL NUMBER FORMAT 1 last serial number old format 333OG00835 first serial number new format DE33700836 2 September 1997 Page 4 of 6 ...

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Page 183: ...MODEL 8114A INDEX OF MANUAL CHANGE MANUAL FRAME CHANGE ERRATA 1 MP13 3 MPI 4 W6 MPl19 2 September 1997 Page 5 of 6 ...

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Page 185: ... MPl3 0460 1243 TAPE INDL 3 75 MANUAL CHANGE 2 On Repl Parts 6 2 add MP14 1400 0824 STRAP CABLE On Repl Parts 6 2 change to read W6 08110 61608 CBL AY RPG LED K On Repl Parts 6 3 change to read MPl19 08 114 40604 COVER SAFETY 2 September 1997 Page 6 of 6 ...

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