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HP 87114B, Service Manual

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HP 87114B Service Manual Download Page 40

2

A

djustments

This

chapter

contains

procedures

to

adjust

the

analyzer

.

Y

ou

need

an

external

controller

for

running

three

of

the

adjustments

.

The

remaining

adjustments

are

accessed

through

the

analyzer's

service

menus

.

Refer

to

\P

ost-Repair

Procedures"

in

the

\Assembly

Replacement"

chapter

to

determine

which

adjustment

procedures

you

need

to

do

when

a

particular

part

has

been

replaced.

Y

ou

should

perform

the

adjustment

procedures

in

the

order

given

here:

1.

Fractional-N

V

CO

A

djustment

2.

Fractional-N

Spur

A

djustment

(Requires

controller)

3.

Frequency

A

ccuracy

A

djustment

4.

Serial

Number

,

A

djustment

#100

(Requires

controller

or

IB

ASIC

option

1C2)

5.

LO

P

ower

Correction,

A

djustment

#101

6.

Switched

Gain

Correction,

A

djustment

#102

7.

External

Detector

Correction,

A

djustment

#103

8.

A

ux

Input

Correction,

A

djustment

#111

9.

Source

P

ower

(ALC)

Correction,

A

djustment

#104

10.

B

Amplitude

Correction,

A

djustment

#105

11.

Transmission

(B/R)

Correction,

A

djustment

#106

12.

AM

Delay

Correction,

A

djustment

#112

13.

Reection

(One

P

ort)

Correction,

A

djustment

#107

14.

R*

Amplitude

Correction,

A

djustment

#108

15.

R*

Frequency

Response

Correction,

A

djustment

#109

16.

B*

Amplitude

Correction,

A

djustment

#110

(Requires

controller

or

IB

ASIC

option

1C2)

Items

1

through

3

above

are

adjustments

where

a

physical

part

is

changed

(e

.g.

a

potentiometer

is

adjusted);

no

correction

constants

are

generated

from

these

adjustments

.

Item

4

above

(adjustment

#100)

does

not

generate

a

correction

constant,

though

the

data

is

entered

into

permanent

memory

on

the

A2

bootROM.

Caution

Procedures

5

through

16

all

generate

correction

constants

.

F

or

proper

operation,

these

correction

constants

must

be

handled

properly

.

Please

read

the

next

few

paragraphs

carefully

.

Adjustments

2-1

Summary of Contents for 87114B

Page 1: ...ilent Keysight 8711B Manual Get Pricing Availability at ApexWaves com Call Today 1 800 915 6216 Email sales apexwaves com https www apexwaves com analyzers keysight technologies 8712 network analyzers 8711B ...

Page 2: ...hat previously shipped under the Hewlett Packard company brand name The brand name has now been changed to Agilent Technologies The two products are functionally identical only our name has changed The document still includes references to Hewlett Packard products some of which have been transitioned to Agilent Technologies ...

Page 3: ...apan tel 81 426 56 7832 fax 81 426 56 7840 Australia tel 1 800 629 485 fax 61 3 9210 5947 Asia Call Center Numbers Country Phone Number Fax Number Singapore 1 800 375 8100 65 836 0252 Malaysia 1 800 828 848 1 800 801664 Philippines 632 8426802 1 800 16510170 PLDT Subscriber Only 632 8426809 1 800 16510288 PLDT Subscriber Only Thailand 088 226 008 outside Bangkok 662 661 3999 within Bangkok 66 1 66...

Page 4: ...Service Guide HP 8711B 12B 13B 14B RF Network Analyzers ABCDE HP Part No 08713 90005 Printed in USA February 1995 ...

Page 5: ...r a particular purpose Hewlett Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material c Copyright Hewlett Packard Company 1995 All Rights Reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed under the copyright laws 1400 Fount...

Page 6: ...ration facility and to the calibration facilities of other International Standards Organization members Regulatory Information The regulatory information is in the User s Guide supplied with the analyzer How to Use This Guide This guide uses the following conventions 4Front Panel Key5 This represents a key physically located on the instrument NNNNNNNNNNNNNNNNNNNNNNN Softkey This indicates a softke...

Page 7: ......

Page 8: ...he function generator model number HP 8116A and address 14 1 14 The attenuator switch driver model number HP 11713A and address 28 1 15 The frequency counter model number HP 5342A and address 02 1 15 The voltmeter model number HP 3456A and address 22 1 15 The printer address 01 1 15 The program directory and the mass storage unit speci er the current MSI device 1 15 The data directory and MSUS 1 1...

Page 9: ...2 13 LO Power Correction Adjustment 101 2 14 Required Equipment 2 14 Estimated Adjustment Time 2 14 Procedure 2 14 Switched Gain Correction Adjustment 102 2 15 Required Equipment 2 15 Estimated Adjustment Time 2 15 Procedure 2 15 External Detector Correction Adjustment 103 2 16 Required Equipment 2 16 Estimated Adjustment Time 2 17 Procedure 2 17 Auxiliary Input Correction Adjustment 111 2 18 Requ...

Page 10: ... Introduction 3 1 Required Tools 3 1 Major Assembly Removal Replacement 3 1 A1 Front Panel Assembly Replacement 3 2 How to Remove the Front Panel Assembly 3 2 A2 CPU Board Assembly Replacement 3 4 How to Remove the CPU Board Assembly 3 4 A3 Fractional N Reference Assembly Replacement 3 7 How to Remove the Fractional N Reference Assembly 3 7 A4 Source Assembly Replacement 3 8 How to Remove the Sour...

Page 11: ...tegory 2 Failures No Error Message but Nonfunctional Measurement 4 14 Troubleshooting the A3 Fractional N Reference Assembly 4 14 Check the Output Power 4 14 Phase Lock Problems 4 14 Detailed Fractional N Reference Troubleshooting 4 15 Troubleshooting the A4 Source Assembly 4 16 Troubleshooting the A5 Receiver Assembly 4 16 A5 Receiver Assembly Diode Replacement 4 17 Trace at 6200 dB 4 20 Detailed...

Page 12: ...embly 6 3 Source Theory 6 4 A3 Fractional N Reference Assembly 6 4 A4 Source Assembly 6 4 Receiver Theory 6 6 Di erences Between the HP 8711B 12B and HP 8713B 14B 1300 MHz vs 3000 MHz 6 7 HP 8713B 14B A4 Source Assembly 6 7 A5 Receiver Assembly 6 8 7 Parts List Analyzer Hardware 7 1 Speci c Assembly and Cable Locations 7 1 8 Correction Constants and Firmware Storing and Recalling Correction Consta...

Page 13: ...the Firmware 8 5 9 Previous Serial Numbers 10 Safety Warranty and Assistance Safety Symbols 10 1 General Safety Considerations 10 2 Safety Earth Ground 10 2 Servicing 10 2 Warranty 10 3 Limitation of Warranty 10 3 Exclusive Remedies 10 3 Assistance 10 4 Shipment for Service 10 4 Index Contents 6 ...

Page 14: ...4 3 3 BootROM U82 Component Location 3 5 3 4 Removing the Fractional N Reference Assembly 3 7 3 5 Removing the A4 Source Assembly 3 8 3 6 Anchoring Screw Locations for A5 Receiver Removal 3 10 3 7 A8 Disk Drive Jumper Con guration 3 13 4 1 Example of an Antistatic Workstation 4 2 4 2 Connecting the Extender Board 4 3 4 3 Power Supply Connector as Viewed from Rear Panel 4 6 4 4 HP 8711B 12B Re ecti...

Page 15: ...and Cable Locations 7 4 7 4 A2 CPU Assembly and Cable Locations 7 5 7 5 A3 Fractional N Reference Assembly and Cable Locations 7 6 7 6 HP 8711B 12B A4 Source Assembly and Cable Locations 7 7 7 7 HP 8713B 14B A4 Source Assembly and Cable Locations 7 8 7 8 HP 8711B 12B A5 Receiver Assembly and Cable Locations 7 9 7 9 HP 8711B 12B A5 Receiver Optional Con gurations Assembly and Cable Locations 7 10 7...

Page 16: ... part number 08712 10011 contact your nearest Hewlett Packard sales and service o ce Results of the automated performance tests can be printed out at any time They include all speci cations limits and uncertainties Although no manual test is provided each test is described in enough detail below to allow a knowledgeable technician to perform all needed tests in an accurate manner System Speci cati...

Page 17: ...Accuracy 65 ppm at 25 C 65 C 1 Hz at 10 change in line voltage Output Power Level Accuracy1 61 0 dB 61 5 dB Option 1EC 75 62 0 dB Option 1E1 Attenuator 63 0 dB Options 1EC and 1E1 1 All power characteristics for HP 8713B 14B analyzers with option 1EC 75 ports are typical above 2000 MHz Maximum Test Port Power Frequency HP 8711B 12B Std HP 8713B 14B Std 1000 MHz 16 dBm1 10 dBm1 1000 MHz 13 dBm1 10 ...

Page 18: ...to 3000 MHz Typical Frequency Response broadband HP 8711B 12B HP 8713B 14B 60 5 dB 61 0 dB Total Power Accuracy broadband Total Power Accuracy Absolute Power Accuracy Frequency Response Dynamic Range Narrowband Frequency HP 8711B 12B 50 HP 8711B 12B 75 HP 8713B 14B 50 HP 8713B 14B 75 5 MHz 60 dB 57 dB 100 dB 97 dB 5 MHz 100 dB 97 dB 100 dB 97 dB Maximum Input Type of Detection HP 8711B 12B HP 8713...

Page 19: ...Absolute Power Accuracy broadband Dynamic Accuracy narrowband 1 4 Performance T ests ...

Page 20: ...o speci cations Its purpose is to provide you with a high degree of con dence that the analyzer is performing properly if it passes The operator s check consists of making a transmission measurement with the cable that was supplied with your analyzer a re ection measurement with the same cable and a measurement with a 50 or 75 termination Use a known good load such as one from calibration kit HP 8...

Page 21: ...r Figure 1 1 Equipment Setup for Transmission Measurement 2 Press 4PRESET5 4SCALE5 4 15 NNNNNNNNNNNNNNNNN Enter 3 Verify that the data trace falls within 60 5 dB of 0 dB See Figure 1 2 for a typical HP 8713B 14B result The HP 8711B 12B should look similar but end at 1300 MHz Figure 1 2 Typical HP 8713B 14B Transmission Measurement 1 6 Performance T ests ...

Page 22: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Reflection 4SCALE5 4105 NNNNNNNNNNNNNNNNN Enter 3 Verify that the data trace falls completely below 016 dB See Figure 1 3 for a typical HP 8713B 14B trace Figure 1 3 Typical HP 8713B 14B Re ection Measurement Figure 1 4 Connect the Load Performance T ests 1 7 ...

Page 23: ...g the following Measure the 175 MHz lter supplied with the analyzer to verify that its measured response is the same as is expected Verify both the frequency accuracy and noise oor Check broadband response with lter using conversion loss mode same as B R If the analyzer s frequency accuracy is critical for your application verify a CW frequency using a frequency counter Verify to 6 005 accuracy fo...

Page 24: ...r s check your analyzer may need servicing Have a quali ed service technician check the analyzer or contact any Hewlett Packard sales or service o ce for assistance Refer to Table 10 1 Hewlett Packard Sales and Service O ces in Safety Warranty and Assistance for the nearest o ce Performance T ests 1 9 ...

Page 25: ...the disk although it is recommended that you run it from your system s hard disk for best performance Generally the program can be stopped reset and re run with little or no loss of data The program will operate on a LIF based system an SRM HFS environment or a DOS environment Operation is a simple menu driven system with some softkey selections For ease of use the 4RETURN5 4ENTER5 4EXECUTE5 key c...

Page 26: ...attenuator 50 HP 8491A B C Opt 003 X 3 dB attenuator 75 0955 0765 X Power splitter 50 0955 0751 11667A X Power splitter 75 0955 0752 X Minimum loss pad 2 HP 11852B X X One for adjustments two for performance tests Frequency counter HP 5342 3A 5350B May not be required 4 Precision cable 50 8120 4781 X X X X Precision cable 75 8120 2408 X Service kit 08712 60012 X X 1 An HP 85032B Option 001 is a su...

Page 27: ...83A sensor s serial number Stp xxxx The actual attenuation values for the 10 dB step attenuator The variable xxxx represents the last four digits in the attenuator s serial number Attenuator values are measured at 30 MHz on an accurate system such as an HP 8902A Option 050 Pd5 xxxx The actual value of the 20 dB 50 attenuator as measured by an accurate system Values are attenuation versus frequency...

Page 28: ...d the 10 dB step attenuator the disk drive locations path and directories other items speci c to your setup Ideally only one con guration le should exist on the program disk so that the program will automatically load only that le However it is possible to have several con guration les stored on the same disk In this case the program will list all of the available les and prompt you to select one ...

Page 29: ...zer s HP IB address 716 The rst selection is the analyzer DUT HP IB address Please note that this is the only address that has both the Interface Select Code ISC and the device number associated with it This address can be any valid address with any valid ISC The ISC does not have to be the same as all the other test equipment which must be all on the same ISC Generally the full address for the DU...

Page 30: ...ll be stored if applicable The data directory and MSUS are otherwise similar to the program directory including the defaults The sensor s 10 dB step attenuator s and xed attenuator s pad s serial numbers xxxx Six of the next seven entries will contain the LAST FOUR digits of the serial numbers for the power meter sensors the step attenuator and the 20 dB attenuators This allows the program to load...

Page 31: ...d the program will request that all frequency cal factor pairs be entered You must start with the lowest frequency for which you have data and sequentially enter higher frequencies until done Each entry must consist of both a frequency in MHz and the cal factor in percent separated by a comma e g 500 98 6 Each frequency entered must be higher than the previous entry These cal factor values must be...

Page 32: ...NNNNNNN CAL DATA ENTRY allows you to enter correction factors for sensors attenuators and attenuators See Con guration File earlier in this chapter NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN PRINT RESULTS allows you to print or view test results from the current DUT or any previously tested analyzer assuming the data was archived You can also add comments or correct any header information that was ...

Page 33: ...excursions are then noted The test is performed at a low frequency and a high frequency The number of cycles is selected by the user A minimum of twenty ve is recommended One hundred cycles will take about ve to ten minutes depending upon computer speed There is no pass fail indication but trace variances of more than 0 1 dB should warrant further investigation or increased monitoring for signs of...

Page 34: ... Failures of this test are rare If this test should fail by a small amount readjust the reference crystal oscillator by performing the frequency accuracy adjustment If it fails by a signi cant amount and the A3 fractional N reference assembly s 10 MHz reference output is accurate suspect excessive noise on the RF output of the source See the section titled Troubleshooting the A4 Source Assembly in...

Page 35: ...lues of the calibrated step attenuator The di erence is the dynamic accuracy error of the analyzer Mismatch errors are minimal since the input output match at 30 MHz is very good For some combinations of options on 75 analyzers the 0 dBm point may not be obtainable In this case only levels at and below 010 dBm are tested If This Test Fails First repeat adjustment 102 If the problem persists suspec...

Page 36: ...ny harmonics of the 30 MHz signal However in most cases the lter can be eliminated It is only required if the second or third harmonic of the HP 8116A is worse than 030 dBc If This Test Fails First verify that the correct 40 dB section of the attenuator is being used if applicable See The 40 dB step attenuator card selection 3 in Performance Test Software Installation earlier in this chapter If th...

Page 37: ...rrection 2 Perform a one port re ection calibration 3 View the NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Source Match array under the NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN View Array Master portion of the NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Meas Cal Options menu Raw directivity can also be viewed by selecting the corresponding softkey Do not confuse this with the defaul...

Page 38: ... will rst check that the timebases are connected together before proceeding If this test is performed manually locking the two analyzers together is not necessary If This Test Fails Note that while many types of spurs are tested only harmonics are speci ed If harmonics should fail repeat the fractional N adjustment as well as adjustment 104 The most likely cause of a failure is the A4 source assem...

Page 39: ......

Page 40: ...Adjustment 103 8 Aux Input Correction Adjustment 111 9 Source Power ALC Correction Adjustment 104 10 B Amplitude Correction Adjustment 105 11 Transmission B R Correction Adjustment 106 12 AM Delay Correction Adjustment 112 13 Re ection One Port Correction Adjustment 107 14 R Amplitude Correction Adjustment 108 15 R Frequency Response Correction Adjustment 109 16 B Amplitude Correction Adjustment 1...

Page 41: ... use the procedure in Storing and Recalling Correction Constants to make a copy of the correction constants This allows you to quickly restore the adjustment data if you replace the CPU board or update the rmware When you are performing the adjustment procedures you should periodically store the correction constants to a disk le This allows you to restore data quickly in case you need to switch OF...

Page 42: ...rd part of service kit 08712 60012 Digital voltmeter any Estimated Adjustment Time This adjustment takes approximately ve minutes to perform Procedure 1 Switch OFF the analyzer s line power Remove the front panel by following these steps and referring to Figure 2 1 a Remove the trim strip from the handles by gently prying it o with a small athead screwdriver b Remove the four 15 TORX screws attach...

Page 43: ... the nut on the rear panel EXT REF BNC connector e Use the handle tab to loosen the assembly then pull the board assembly out of the analyzer Attach the fractional N reference assembly backplane connector to the upper extender board f Reconnect the SMB cables If necessary use the longer SMB cables provided in the service kit 3 Switch ON the analyzer s line power If your analyzer is an HP 8711B 12B...

Page 44: ... until TP11 reads 01 17 60 03 volts with respect to board ground Remove the adjustment tool and measure the voltage again to insure that it has not changed 6 If you are going to make the fractional N spur adjustment continue to that procedure without changing the equipment setup If you are not going to make the fractional N spur adjustment reassemble the analyzer Adjustments 2 5 ...

Page 45: ...est software 08712 10011 08712 10011 Spectrum analyzer HP 8560 Series or HP 8566B HP 8560 Series or HP 8566B Test port cable 8120 4781 8120 4781 Minimum loss pad N A HP 11852B Service extender board p o service kit 08712 60012 p o service kit 08712 60012 Note Before performing this adjustment Check the voltage at A3TP11 as described in the previous adjustment Fractional N VCO Adjustment and adjust...

Page 46: ... two hold down screws and sliding the cover toward the power cord receptacle b Attach the service extender board by reversing step a with the lower extender board Tighten the screws securely c Place an antistatic mat on top of the analyzer d Remove the two SMB cables from the fractional N reference assembly Remove the nut on the rear panel EXT REF BNC connector e Use the handle tab to loosen the a...

Page 47: ...ance tests main menu 7 For each API adjustment the program shows spurs three times once for each fractional N VCO frequency To minimize the spur adjust the potentiometers shown in Figure 2 5 You may have to compromise the three di erent adjustments of the same pot to achieve the best overall results Generally the API 1 spur is the worst When adjusting the API 2 and API 4 spurs their amplitude may ...

Page 48: ...yzer completely yet Run the spurious signal portion of the performance test to verify that the API fractional N spurs still pass once the assembly has been re installed 10 If you do not need to repeat the API and 100 kHz spurs adjustment remove the extender board and reassemble the analyzer Note The spur performance of the fractional N board may change signi cantly when you reinstall the assembly ...

Page 49: ...utes to perform Procedure 1 Connect the equipment as shown in Figure 2 6 Figure 2 6 Setup for Frequency Accuracy Adjustment 2 Set the frequency counter input switches to the 10 Hz 500 MHz and 50 positions 3 On the analyzer press 4PRESET5 4FREQ5 NNNNNNNN CW 45005 NNNNNNNNNNN MHz 4MENU5 in the SOURCE keypad section NNNNNNNNNNNNNNNNNNNNNNN Trigger NNNNNNNNNNNNNN Hold If the frequency counter reading ...

Page 50: ...e table top d Grasp and pull the front panel with two hands one on the top middle of the panel and the other on the bottom middle of the panel Figure 2 7 Removing the Handles and Front Panel 6 Reconnect the frequency counter and adapter s to the RF OUTPUT connector 7 To obtain a counter reading of 500 MHz 62500 Hz or better adjust R1 on the A3 fractional N reference assembly accessible through a h...

Page 51: ...BM PC AT style keyboard is the only requirement Estimated Adjustment Time This adjustment takes approximately two minutes to perform Procedure 1 Write down the 10 character serial number exactly as shown on the analyzer rear panel label 2 Use one of the following BASIC commands to set the serial number Replace the XXXXXXXXXX in the command with your analyzer s serial number a If you are using HP B...

Page 52: ... serial number tag again and verify that you have the correct serial number If the analyzer displays an error message that tells you Serial number already set that means a serial number is already installed on that CPU board and therefore cannot be changed Contact your nearest HP Sales and Service O ce for instructions Adjustments 2 13 ...

Page 53: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Select Adjustment 41015 4ENTER5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Execute Test This is a fully automated adjustment handled by the internal rmware Follow the instructions displayed on the analyzer s CRT 3 If you are not going to make any more adjustments nish with the procedure titled To Permanently Store CCs in the Analyzer part of Storing and Recalling ...

Page 54: ...of the 6 dB attenuator If the voltage reference source is not available any stable dual 624mV voltage source will work This source voltage is not critical any value between 20mV and 30mV should su ce See adjustment 103 next for connection information Estimated Adjustment Time This adjustment takes approximately two minutes to perform Procedure 1 Press 4PRESET5 4SYSTEM OPTIONS5 NNNNNNNNNNNNNNNNNNNN...

Page 55: ...rce1 part of service kit 08712 60031 1 See Note below Note If a voltage reference source is not available connect the requested voltages to the external detector connector as shown in Figure 2 8 Note that both a positive and negative voltage are required simultaneously and both must be referenced to ground pin D V pin C V0 pin K GND These voltages may be obtained from a dual power supply however i...

Page 56: ...ulting in a warning message check the connections voltages and switch positions then rerun the test 3 If you are not going to make any more adjustments nish with the procedure titled To Permanently Store CCs in the Analyzer part of Storing and Recalling Correction Constants in Chapter 8 If you are going to make more adjustments save the correction constant data that you have generated so far Inser...

Page 57: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Select Adjustment 41115 4ENTER5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Execute Test 2 This is a fully automated adjustment handled by the internal rmware Follow the instructions on the analyzer s display 3 If you are not going to make any more adjustments nish with the procedure titled To Permanently Store CCs in the Analyzer part of Storing and Re...

Page 58: ... this adjustment procedure Note If your analyzer has rmware revision B 03 00 and does not have an optional attenuator option 1E1 then you must update the rmware to revision 3 01 or greater Required Equipment Equipment Description Recommended Model or Part Number 50 standard 75 opt 1EC Power meter HP 437B 438A HP 437B 438A Power sensor HP 8482A HP 8482A High sensitivity power sensor for opt 1E1 ana...

Page 59: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Talker Listener 6 If you are not going to make any more adjustments continue with the procedure titled To Permanently Store CCs in the Analyzer part of Storing and Recalling Correction Constants in Chapter 8 If you are going to make more adjustments save the correction constant data that you have generated so far Insert a formatted disk into the internal disk dr...

Page 60: ...stment you need to repeat all of the adjustments done up to this point then repeat the source power correction If you did save the correction constants to disk recall the correction constants data from disk as described in Storing and Recalling Correction Constants then go back to step 1 to repeat this adjustment Adjustments 2 21 ...

Page 61: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Select Adjustment 41055 4ENTER5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Execute Test 3 Follow the instructions on the screen 4 If you are not going to make any more adjustments continue with procedure titled To Permanently Store CCs in the Analyzer part of Storing and Recalling Correction Constants in Chapter 8 If you are going to make adjustments sa...

Page 62: ...NNNNNNNNNNNNN Test and Adjustments NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Select Adjustment 41065 4ENTER5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Execute Test 3 Follow the instructions on the screen 4 If you are not going to make any more adjustments nish with the procedure titled To Permanently Store CCs in the Analyzer part of Storing and Recalling Correction Constants in Chapter 8...

Page 63: ...ments NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Select Adjustment 41125 4ENTER5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Execute Test 3 Follow the instructions on the screen 4 If you are not going to make any more adjustments nish with the procedure titled To Permanently Store CCs in the Analyzer part of Storing and Recalling Correction Constants in Chapter 8 If you are going to make mor...

Page 64: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Select Adjustment 41075 4ENTER5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Execute Test 2 Follow the instructions on the screen 3 If you are not going to make any more adjustments nish with the procedure titled To Permanently Store CCs in the Analyzer part of Storing and Recalling Correction Constants in Chapter 8 If you are going to make more adjustments save the corr...

Page 65: ...NNNNNNNNNNNNNNNNNNN Test and Adjustments NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Select Adjustment 41085 4ENTER5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Execute Test 3 Follow the instructions on the screen If the analyzer displays an error message and aborts the adjustment the calibration data from adjustments 103 and 104 are probably corrupt and adjustments 103 and 104 should be perf...

Page 66: ...NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Test and Adjustments NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Select Adjustment 41095 4ENTER5 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Execute Test 3 Follow the instructions on the screen 4 If you are not going to make any more adjustments nish with the procedure titled To Permanently Store CCs in the Analyzer part of Storing and Recalling...

Page 67: ...justment Running the B Amplitude Correction Using the Performance Test Software 08712 10011 This adjustment sets up a 30 MHz signal and applies power levels of 030 dBm to 18 dBm in 2 dB steps to the B input The analyzer then compares the measured value to the nominal value and generates a correction table To perform this procedure you need an HP BASIC controller The controller uses the power meter...

Page 68: ... 11 Setup for B Amplitude Correction for 75 Analyzers 1 This is a fully automated adjustment handled by the internal rmware Refer to the Performance Tests chapter for information on loading and running the software In the Test Selection Menu select ADJUSTMENT B AMPLITUDE 2 Follow the prompts to complete the adjustment Refer to Figure 2 10 or Figure 2 11 Adjustments 2 29 ...

Page 69: ...ction Constants in Chapter 8 If you are going to make more adjustments save the correction constant data that you have generated so far Insert a formatted disk into the internal disk drive Press 4SYSTEM OPTIONS5 NNNNNNNNNNNNNNNNNNNNNNN Service NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Update Corr Const NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Store CC To Disk This creates a l...

Page 70: ...apabilities exist the 6 dB pad will also not be required Note Not all analyzers may be capable of the required high power 18 3 dBm at 30 MHz If this mode of operation is selected the program will check for this power capability before proceeding The connection diagram is similar to that shown in Figures 2 10 and 2 11 Required Equipment Equipment Description Recommended Model or Part Number 50 stan...

Page 71: ...menu selections follow NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Analyzer Address The HP IB address of the analyzer you will be controlling usually 16 This value doesn t matter if you are not controlling another analyzer If selected you will be asked to enter the desired two digit address Use care there is little error checking on any data entry Note that if one analyzer is controlling an...

Page 72: ...program will search for each HP IB device If any device is not found an error is reported You will be asked to zero and calibrate the power sensor 8 If the internal analyzer source was selected the program will test the 30 MHz output power capability for at least 18 3 dBm If this is not obtainable the program will halt you must then use an HP 8116A 9 Follow the instructions on the display No conne...

Page 73: ......

Page 74: ...driver required only for display replacement Major Assembly Removal Replacement The following sections describe how to remove your analyzer s major assemblies These include the A1 front panel assembly A2 CPU assembly A3 fractional N reference assembly A4 source assembly A5 receiver assembly A6 power supply assembly A7 CRT assembly A8 oppy disk drive assembly attached to the A2 CPU assembly Option ...

Page 75: ... three parts Front frame Nameplate choose according to model number Front dress panel choose 50 or 75 version How to Remove the Front Panel Assembly 1 Disconnect the power cord 2 Remove the front handles trim strip rst See Figure 3 1 3 Pull the center top of the front panel up slightly and pull the center bottom down slightly to release the two centered catches 4 Pull the front panel away from the...

Page 76: ...isconnect the ve wire cable from A1J2 Remove the knob hex nut and washer Note If you are replacing a probe power fuse they are located in sockets on the A1 front panel assembly See Table 7 3 Item 7 Assembly Replacement 3 3 ...

Page 77: ...proved ESD workstation See Figure 4 1 in the Troubleshooting and Block Diagrams chapter Any A2 CPU replacement assembly is supplied in its minimal format This may not work in all instances depending upon model and options unless the following instructions are adhered to The latest version rmware will have already been installed at the factory If you wish to change this rmware you will need a rmwar...

Page 78: ...bly Figure 3 3 BootROM U82 Component Location 7 Transfer option ROMs required for option 1C2 and some other options a Locate and remove any of the following socketed option ROMs from the old CPU board these ROMs are not present in all analyzers U137 for the IBASIC option 1C2 and U142 for other options Insert them into the replacement CPU assembly 8 Transfer any SIMM memory a Locate any SIMM DRAM m...

Page 79: ...st analyzers do not have any SIMM memory 9 Transfer the A8 3 5 internal disk drive assembly Remove the disk drive from the old board and install it on the replacement assembly 10 Transfer all cable assemblies Remove all cable assemblies from the old board and properly attach them to the replacement board 3 6 Assembly Replacement ...

Page 80: ...blies are slightly di erent the assembly disassembly procedures are the same Figure 3 4 Removing the Fractional N Reference Assembly How to Remove the Fractional N Reference Assembly 1 Disconnect the power cord 2 Remove the front panel assembly see How to Remove the Front Panel Assembly Remove the handle nut plate on the right side only 3 Disconnect if present any cable from the EXT REF IN BNC con...

Page 81: ...tor 4 Remove the front panel assembly see How to Remove the Front Panel Assembly Remove the handle nut plate on the right side only 5 Disconnect the four cables from the front of the source assembly See Figure 3 5 Caution Be very careful when reconnecting the semi rigid cables Items numbered 1 and 4 in Table 7 1 and Table 7 2 in the Parts List chapter They are not interchangeable Ensure that one c...

Page 82: ...is not possible to duplicate this in the eld The replacement A5 receiver assemblies are supplied in their minimal format which may not work in all instances depending upon installed options Perform all of the required steps below if applicable Note For analyzers with option 1E1 If the analyzer contains the optional 10 dB step attenuator it is necessary to remove the attenuator board assembly from ...

Page 83: ... are two semi rigid cables connecting the A5 assembly to the A4 assembly Completely loosen one nut on each cable where it connects to the A4 assembly then separate the cable from the A4 assembly Caution Be very careful when reconnecting the semi rigid cables Items numbered 1 and 4 in Table 7 1 and Table 7 2 in the Parts List chapter They are not interchangeable Ensure that one cable is not confuse...

Page 84: ... panel assembly see How to Remove the Front Panel Assembly Remove the handle nut plate on the left side only 3 Remove the display enclosure see the following section How to Remove the Display Assembly 4 Remove the four screws along the rear edge of the display enclosure 5 Lift open the display access panel and disconnect the two wire cable from the power supply 6 Withdraw the power supply from the...

Page 85: ...ont panel assembly see How to Remove the Front Panel Assembly Remove handle nut plate on left side only 5 Withdraw the enclosure 2 or 3 inches from its cavity 6 Disconnect the ribbon cable from the jack behind the top of the CRT 7 Withdraw the enclosure completely from its cavity Note To replace the power switch or brightness control a Remove the display enclosure from the analyzer b Locate the sw...

Page 86: ...s and correct them if necessary The jumpers should connect pins 2 and 3 pins 6 and 7 and pins 15 and 16 Figure 3 7 A8 Disk Drive Jumper Con guration How to Remove the 3 5 Disk Drive Assembly 1 Disconnect the power cord 2 Remove the front panel assembly see How to Remove the Front Panel Assembly 3 Remove the CPU assembly see How to Remove the CPU Assembly 4 Remove the four screws anchoring the disk...

Page 87: ...A4 Source LO Power Correction1 Source Power Correction B Amplitude Correction Transmission Correction Re ection Correction AM Delay2 Power Range and Flatness Spurious Signals A5 Receiver LO Power Correction1 Switched Gain Correction Aux Input Correction External Detector Correction Source Power Correction B Amplitude Correction Transmission B R Correction Re ection One Port Correction R Amplitude ...

Page 88: ...es If you need to replace an assembly and would like to save money consider a R E rebuilt exchange assembly These factory repaired tested assemblies are available on a trade in basis They meet all factory speci cations required of a new assembly They are designated R E in the Parts List chapter Save Time by Calling 800 227 8164 To order parts as fast as possible call the above number Monday throug...

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Page 90: ...ent i e through line transmission trace is not at and centered around 0 dB Category 3 Failures Inaccurate but reasonably functional measurements Category 4 Failures Peripheral device problems such as HP IB problems printer problems keyboard problems General Notes Warning Always unplug the analyzer s line power before removing or installing an assembly Caution If you need to disassemble the instrum...

Page 91: ...ntains several parts that are useful for adjusting and servicing the analyzer The following parts are included An extender board assembly that allows you to operate selected internal board assemblies outside the analyzer chassis Two SMB extension cables 12 inches long 30 cm A modi ed 5 16 inch wrench for better access to SMA cable nuts A 6 inch 150 mm semi rigid coaxial extension cable A non shiel...

Page 92: ...fully operational while either of these boards are connected to the extender board To use the extender board follow these instructions 1 Loosen the two screws on the back cover 2 Slide the cover to the right and remove it 3 Attach the lower half of the extender assembly to where the cover was previously located 4 Align the hold down screws and tighten securely the board will not function if not ti...

Page 93: ...ns will be displayed The graticule may also be displayed depending on the analyzer s power down state Press 4PRESET5 The display should show a transmission trace a at line at 0 dB If it does not ensure the cable connecting the RF OUT port to the RF IN port is good as well as securely connected If the analyzer will not switch on check the AC line power Make sure that the line voltage selector below...

Page 94: ...EDs are still o replace the power supply If the green LED is on the red LED is on steadily and the fan is o Check the line voltage selector switch located below the AC power jack If it is correct remove the power supply display assembly and make sure that the cable from the on standby switch to the power supply assembly is connected With the power supply display assembly outside the analyzer plug ...

Page 95: ...the four power supply LEDs visible from the right side of the display enclosure as viewed from the front If one or more LEDs are o Replace the power supply If all the LEDs are on Reseat the power supply display assembly making sure there s a good connection to the rear panel Measure the voltages again If the problem persists check connectors on the power supply and on backplane board If the voltag...

Page 96: ...rror During Power up If there is no beep at power up but the CRT display is normal The problem is probably in the sound generator or speaker on the CPU board Check the sound generator chip U143 and the speaker LS1 or replace the CPU board If there is no beep at power up and no CRT display The problem is most likely one of three conditions No power to CPU board no CPU LEDs on CPU chip not plugged i...

Page 97: ...outside the analyzer Switch the analyzer on and make sure the green VIDEO ON LED next to the display ribbon cable connector is on Check these signals HSYNC signal at TP12 24 1 kHz TTL signal VSYNC signal at TP13 60 Hz TTL signal If either of these is not normal try replacing U101 and U102 or replace the entire CPU board If an error occurs while rmware is being loaded after 2 beeps are heard Reload...

Page 98: ...the Service Related Menus section of this guide for detailed descriptions of each test Note Not all error messages are listed in the table Many error messages describe the problem clearly and require no further explanation so they are not included in this guide Some error messages are only partially reproduced because the remainder of the message is speci c to the error e g provides address at whi...

Page 99: ...place CPU or check the following Control circuitry U31 U38 Data bu ers U76 U77 Address MUX U50 U74 U75 6 340x0 GSP Processor Test not implemented 7 GSP Video Test not implemented 8 number not used Test number not used because test status LED powers up with this as default An 8 on the LED indicates the 68020 was unable to power up and execute basic instructions 9 DSP SRAM Errors same as for test 4 ...

Page 100: ...es U109 voltage regulator for Vpp 17 Real Time Clock Tests ability to write read to real time clock 18 Front Panel Interface Errors Front panel keyboard FAILED Command write timeout Read input timeout Clear input bu er failed Echo byte test failed Tests front panel control processor Replace CPU board or check U136 U138 19 Floppy Disk Controller Error Floppy Disk controller FAILED Error number num ...

Page 101: ...RAM Note the caution message Press 4BEGIN5 to do so Continue if the error persists Measure the 5 MHz Reference Signal The DSP requires this signal from the fractional N reference assembly for proper operation This signal is routed on the backplane board Make sure that the fractional N reference assembly is pushed all the way in and making good contact with the backplane Measure the 5 MHz signal at...

Page 102: ... board needs to be replaced If the analyzer intermittently will not power up but cycling the line power restores normal operation then replace A3U20 Other Error messages In some unusual cases an error message similar to that shown below may occur This may indicate a defective component an anomaly in the rmware code or an unspeci ed operating condition In general however this message should never b...

Page 103: ...er Problems Otherwise proceed to the Troubleshooting Receiver Problems Phase Lock Problems There are three phase lock loops on the source board RF1 RF2 and the source LO As you can see from the overall block diagram at the end of this chapter the source LO is mixed with the RF1 signal to produce the source RF output It is also mixed with the RF2 signal to produce the receiver LO output Since both ...

Page 104: ...25 90002 for more detailed troubleshooting information if you wish to troubleshoot to the component level To Verify Fractional N Output Set the analyzer to the CW frequencies in the Table 4 2 and check the fractional N output at A3J1 connector on the left The typical amplitude of this signal should be in the 0 to 4 dBm range Any harmonics should be better than 016 dBc Table 4 2 Source Frequency Ve...

Page 105: ... installed options Frequency accuracy should be within 15 kHz 6500 Hz for HP 8711B 12B Now check the LO output from the source at A4J1 Using the same conditions as above measure the LO when the RF out is set to 50 MHz The LO should always be 27 778 kHz above the RF signal Repeat for 3000 MHz 1300 MHz for HP 8711B 12B Power levels for the LO should be in the 6 to 14 dBm range regardless of frequenc...

Page 106: ...odes will generally be the rst components to fail if the maximum input level is exceeded or if it is subjected to excessive ESD Refer to A5 Receiver Diode Replacement below A5 Receiver Assembly Diode Replacement Caution You must perform this procedure only at static safe workstation to prevent damage from electrostatic discharge ESD See Figure 4 1 If the analyzer s RF IN port is overpowered by exc...

Page 107: ...lacing the detector diodes note the polarity of the existing parts and make sure the new ones are oriented the same See Figure 4 6 for HP 8711B 12B or Figure 4 7 for HP 8713B 14B for component location You will have to remove the receiver shield to access these parts On the HP 8713B 14B CR47 and CR48 are mounted in the same location as CR45 and CR46 but on the opposite top side of the board All ad...

Page 108: ...Figure 4 7 HP 8713B 14B A5CR45 CR46 CR47 CR48 CR53 and CR54 Component Locations T roubleshooting and Block Diagrams 4 19 ...

Page 109: ...he receiver s ADC clock and data signals with a clock signal and fake data generated on the CPU board The instrument should power up normally Observe the CRT If random noise data trace around 0 dB is observed the CPU is functioning properly Replace the A5 receiver assembly or go to Detailed Receiver Troubleshooting below If no random noise data trace is observed around 0 dB replace the A2 CPU Deta...

Page 110: ...typical values are the same as for harmonics Connect the spectrum analyzer to the receiver LO output at A4J1 and repeat If there are spurs in source RF output only OR receiver LO output only not both Replace the A4 source assembly If there are spurs in source AND receiver outputs The problem may be due to spurs in the 10 MHz or fractional N inputs to the A4 source assembly Fractional N spurs are n...

Page 111: ...ent Narrowband mode problems Switched Gain Correction B Amplitude Correction Transmission Correction Re ection Correction Broadband mode problems Switched Gain Correction External Detector Correction R Amplitude Correction R Frequency Response Correction B Amplitude Correction If data seems to drift check the uncorrected performance of the analyzer Connect a good load to the RF OUT port Press 4PRE...

Page 112: ... or input match Measure the match using the performance tests If OK try using attenuators to improve match Receiver Power Problems Check all cables and cable connections on the receiver board tighten if necessary If the problem is caused by a power hole try moving the cables to see if the power hole moves or disappears If it does the cable is probably defective If the analyzer has a step attenuato...

Page 113: ... shows the baud rate parity and handshake information If any of this is incorrect enter the correct information Refer to the printer or plotter manual for proper parameters Refer to your analyzer s User s Guide for more details on hardcopy options Try to make a print or plot from another instrument or a computer to con rm that the printer plotter is working If it is replace the CPU board Centronic...

Page 114: ...s are down and so forth Plotters should not be in VIEW mode Press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Prior Menu NNNNNNNNNNNNNNNNN Start to do a print or plot If the result is not a copy of the display as selected by NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Define Hardcopy suspect HP IB problems in the analyzer HP IB Problems with Disk Drives For disk drives press 4SAVE RECALL5 NNNNNNNNNNNNNNN...

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Page 117: ...fer to Figure 5 1 for the service key menu maps Also included in this chapter are miscellaneous service functions and HP IB commands Procedures to clear nonvolatile memory SRAM and to load rmware are included in the Miscellaneous Service Functions section Equivalent HP IB commands for some of the service menu keystrokes are found in the HP IB Command Reference for Service section Note The function...

Page 118: ...Figure 5 1 The Service Key Menus 5 2 Service Related Menus ...

Page 119: ...ter the adjustment number or use the front panel knob or up down arrow keys to scroll through the list The number description and test status of the currently selected test are shown Possible test status notations are PASSED FAILED and NOT DONE See Adjustments for a listing of the adjustments and their descriptions NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Execute Test Executes the selected test or a...

Page 120: ...rity of the contents of battery backed SRAM Detects loss of power to the SRAM 14 Digital IF Control Not implemented 15 CPU Support Circuitry Tests various circuits that are required for the main processor 68020 to operate Tests 68901 MFP chip timers interrupts Attempts to clear and disable all interrupts Tests each interrupt signal to the 68020 to make sure that none of them are asserted 16 Analog...

Page 121: ...dware Prompts user to connect a printer and then sends characters to the port 33 Test TTL Pass Fail Bit Test Prompts user to disconnect cable and then tests the hardware Prompts user to ground the BNC and then tests the hardware 34 Test TTL User Bit Test Prompts user to disconnect cable and then tests the hardware Prompts user to ground the BNC and then tests the hardware Denotes a test run during...

Page 122: ...e ection correction Performs one port cal to correct for narrowband re ection A R measurements 108 R Amplitude Correction R amplitude correction Generates absolute power lookup table for the R input at 30 MHz 109 R Frequency Response Correction R frequency response correction Generates frequency response correction for the broadband R input 110 B Amplitude Correction B amplitude correction Generat...

Page 123: ...OM to a RAM bu er Any changes to the correction constants are made to the bu er only Pressing this key creates a disk le that contains the correction constants from the bu er This le is always written to the internal disk drive regardless of the disk drive selected using the save recall functions The le will be written over any existing le with the same name NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN...

Page 124: ...nts are not stored to EEPROM before power is cycled Date format is as de ned under the NNNNNNNNNNNNNNNNNNNNNNNNNNNNN Set Clock menu NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Select Array NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Display Array These two selections are virtually identical and both display the same data Information displayed is the stored correction for the indicated parameter Assuming ...

Page 125: ...ut 20 points it may appear slightly discontinuous this is normal For units without an attenuator without option 1E1 the correction should be at for any attenuation value other than zero Higher ALC values represent higher power levels 33 B Amplitude Linearization broadband See Comments This is the correction curve for the absolute B power measurement It represents voltage Y axis out vs power in It ...

Page 126: ...arrays from the currently active calibration default full band or user de ned NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN View Array Interpol Selects the interpolated cal arrays from the master to be displayed These are the cal arrays from the currently active calibration default full band or user de ned If the frequency range of the analyzer has not been changed since the last cal...

Page 127: ... LOG on the schematic Value depends on the source power level Normal values are 01 75 to 00 5 volts 7 ALC PIN modulator Voltage to ALC PIN modulator on the source board This value increases as the source power increases Normal values range from 3 0 to 10 5 volts A5 Receiver Assembly Nodes 8 5V on RCVR 5V power supply on the receiver board Normal values are 4 5 to 5 5 volts 9 15V on RCVR 15V power ...

Page 128: ...e DAC which controls the LO output power The LO DAC is used by the HP 8711B 12B receiver board only NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Detector Zero DACs FOR FACTORY USE ONLY NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Ext Det Info FOR FACTORY USE ONLY NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Bandcross ON off FOR FACTORY USE ONLY View Array Master Menu View Array Interpo...

Page 129: ...asking if you want to zero the SRAM Press the 4BEGIN5 key to clear the memory Press softkey 8 bottom softkey if you want to continue without clearing the memory HP IB Command Reference for Service Some of the service menu keys have equivalent remote HP IB commands The analyzer uses the SCPI programming language For more information about SCPI and HP IB refer to the HP IB Programming section of the...

Page 130: ...FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF Select Self Test TEST SEL num FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF Select Adjustment TEST SEL num FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF Execute Test TEST STAT RUN FFFFFFFFFFFFFFFFFFFFFFFF Stop Test TEST STAT STOP Meas Cal Options Menu FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF Meas Cal ON off SENS 1 2 CORR STAT ON1 OFF 0 Update Corr Const Menu FFFFFFFFFFFFFF...

Page 131: ...and Store correction constant data from the RAM bu er into ash EPROM DIAGnostic CPU MEMory WORD addr num data num NR1 Write a 16 bit data value to a 68020 address Query returns an integer with the 16 bit value at the selected address DIAGnostic SNUMber string STRING Store a serial number into memory The string must be 10 characters long The query form returns the current serial number IDN Query ST...

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Page 133: ...of a source signal separation devices a receiver and a display The analyzer integrates a synthesized RF source with built in couplers for signal separation a combination narrowband and broadband receiver and a display Figure 6 1 shows a simpli ed system block diagram for the analyzer In the analyzer the A3 fractional N reference and A4 source assemblies provide the synthesized RF source output The...

Page 134: ...by but o during normal operation It will blink to indicate a power supply shutdown Refer to the Troubleshooting and Block Diagrams chapter for more details Digital Control Theory This group includes the A1 front panel A2 CPU A7 display and A8 3 5 internal disk drive assemblies A1 Front Panel Assembly The A1 front panel assembly allows the user to control the analyzer It includes a keyboard and RPG...

Page 135: ... EPROMs for a rmware update also erases the correction constant data so it is necessary to have a copy of this data on disk for retrieval after the update The non volatile SRAM is used to store instrument state and peripheral state settings It is also used as a RAM disk by the save recall functions which refer to the non volatile SRAM as NON VOL RAM DISK This non volatile SRAM is powered by a 12V ...

Page 136: ... the RF OUT REFLECTION port on the front panel The other signal serves as the internal receiver LO for downconverting narrowband signals The two signals are independently phase locked and they are separated from one another by the receiver IF intermediate frequency of 27 778 kHz Note The following paragraphs describe an HP 8711B 12B The HP 8713B 14B is very similar See the section Di erences Betwe...

Page 137: ...s will be at di erent frequencies resulting in spurs that have shifted in frequency when compared to the dither o state This is used in two ways You can select NNNNNNNNNNNNNNNNNNNNNNNNNNNNN Dither ON under the SOURCE 4MENU5 key which causes the analyzer to shift the RF1 and RF2 frequencies to the dither on values for all subsequent sweeps until dither is switched OFF again This is useful if you ar...

Page 138: ...ouplers The rst coupler measures the source output signal and uses this as a reference R input The source output signal travels the through arm of the second coupler which is used in re ection measurements to sample the signal re ected from the REFLECTION test port This re ected signal is referred to as the A input The source output signal then goes out the REFLECTION port propagates through the d...

Page 139: ...board Di erences Between the HP 8711B 12B and HP 8713B 14B 1300 MHz vs 3000 MHz The HP 8713B 14B analyzers are very similar to the HP 8711B 12B They all share the same front panel CPU fractional N reference power supply display and rmware The two major di erences are in the source and receiver Refer to the block diagram of the HP 8713B 14B for an overall view of these two assemblies As in the HP 8...

Page 140: ...ut 42 to 57 MHz to provide the 1910 to 3000 MHz RF output in bands 2 through 4 This means that during a full band sweep of 3 to 3 GHz the fractional N output will rst sweep from about 32 to 58 MHz then reset to 42 MHz and sweep again up to 57 MHz A5 Receiver Assembly Besides the above mentioned coupler change there is little functional di erence between the HP 8711B 12B receiver and the HP 8713B 1...

Page 141: ...iver 0515 0430 M3 x 6 PN Most places all sheet metal 7 in lbs T10 0515 0664 M3 x 12 PN All casting shields 7 in lbs T10 0515 1946 M3 x 6 FL Handle nut plate screws 4 7 in lbs T10 0515 0943 M4 x 12 FL Handle screws 8 21 in lbs T15 0515 0658 M2 x 6 PN Power switch 2 3 in lbs T6 0515 0374 M3 x 10 PN Connector Display Ribbon Cable 2 7 in lbs T10 Note All semi rigid coax cables should be tightened to 1...

Page 142: ...See Table 7 6 1 A5 Receiver assembly See Table 7 8 standard or Table 7 9 options 1E1 and or 1DA 1DB 1 A6 Power supply not shown See Table 7 12 1 A7 Display assembly See Table 7 13 1 A8 3 5 internal disk drive attached to the A2 assembly See Table 7 4 1 1 Cable A4J1 to A5 LO input 08712 20024 1 2 Cable A4J2 to A3J1 08753 60061 2 3 Cable A4J3 to A3J3 08753 60061 4 Cable A4J4 to A5 RF input 08712 200...

Page 143: ...e Table 7 7 1 A5 Receiver assembly See Table 7 10 standard or Table 7 11 options 1E1 and or 1DA 1DB 1 A6 Power supply not shown See Table 7 12 1 A7 Display assembly See Table 7 13 1 A8 3 5 internal disk drive attached to the A2 assembly See Table 7 4 1 1 Cable A4J1 to A5 LO input 08713 20022 1 2 Cable A4J2 to A3J1 08753 60061 1 3 Cable A4J3 to A3J3 08753 60061 1 4 Cable A4J4 to A5 RF input 08713 2...

Page 144: ... assembly 08711 60101 1 3 Probe power socket 08711 60037 1 4 RPG Rotary Pulse Generator assembly 1990 1525 1 5 Knob for RPG on reverse side 01650 47401 1 6 Fuse for power probe socket 0 75A 125V 2110 0424 2 7 Label HP 8711B 08711 80035 1 Label HP 8712B 08712 80003 1 Label HP 8713B 08713 80001 1 Label HP 8714B 08714 80001 1 8 Panel front dress 50 08711 80002 1 Panel front dress 75 08711 80004 1 7 4...

Page 145: ...face 3A 125V 2110 0332 2 11 Cable ribbon display assembly 8120 5526 1 12 Cable ribbon Front panel assembly 8120 5527 1 13 Cable ribbon 3 5 internal disk drive assembly 8120 6474 1 14 Battery 3 0V 1420 0338 1 15 CPU front shield assembly 08712 60003 1 16 CPU rear shield assembly 08712 00004 1 17 A8 3 5 internal Disk Drive Assembly NOT part of A2 CPU assembly 0950 2075 1 18 BootROM U82 y 19 Option R...

Page 146: ...35 0515 1038 4 5 Cable J2 to J15 8 5 in 8120 2587 1 6 Cable J4 to J8 8 5 in 8120 2587 1 7 Cable J7 to J17 8 5 in 8120 2587 1 8 Cable J18 to J18 SH 12 in 8120 2586 1 9 Shield REF bottom 08711 20021 1 10 Shield REF top 08711 20020 1 11 Shield fractional N VCO top 03325 40602 1 12 Shield fractional N VCO spacer plate 03325 40601 1 13 Front shield handle assembly fractional N reference 08712 60008 1 J...

Page 147: ...1 3 Front shield bottom 08711 20023 1 4 Front shield gasket 08711 20043 2 5 Rear shield top 08711 20024 1 6 Rear shield bottom 08711 20025 1 7 Rear shield gasket 08711 20044 2 8 L bracket 1400 1669 1 9 Front shield handle 08712 60007 1 J1 J4 Connector SMA 1250 1986 2 J2 J3 Connector SMB 1250 1512 2 Lockwasher 195 in not shown for SMB 2190 0124 2 Nut Hex 10 32 in not shown for SMB 2950 0078 2 Parts...

Page 148: ...nt shield bottom 08713 20026 1 5 Front shield gasket bottom 08713 20030 1 6 Rear shield top 08713 20025 1 7 Rear shield gasket top 08713 20029 1 8 Rear shield bottom 08713 20027 1 9 Rear shield gasket bottom 08713 20031 1 10 L bracket 1400 1669 1 11 Front shield handle 08712 60007 1 J1 J4 Connector SMA 1250 1986 2 J2 J3 Connector SMB 1250 1512 2 Lockwasher 195 in not shown for SMB 2190 0124 2 Nut ...

Page 149: ...1 Hex nut for BNC connector 2950 0054 1 Washer for BNC connector 2190 0068 1 4 Square shield top 08712 20013 1 5 Square shield bottom 08711 20026 1 6 Square shield gasket 08711 20040 2 7 Connector RF IN to J4 cable assembly 08712 20016 1 8 Cable J2 to RF OUT 50 08712 20014 1 Cable J2 to RF OUT 75 08712 20028 1 9 Cable assembly Source RF to J3 08712 20025 1 10 External detector input includes both ...

Page 150: ... 08712 60023 1 16 Cable ATTEN OUT to J3 08712 20015 1 17 Cable RF IN to ATTEN IN 08712 20023 1 18 Cable ribbon option 8120 6475 1 19 Cable ribbon attenuator 8120 6473 20 AM delay modulator assembly 08712 60009 1 21 Cable RF IN to AM DELAY MOD IN 08712 20018 1 22 Cable AM DELAY MOD OUT to J3 08712 20019 1 23 Cable AM DELAY MOD OUT to ATTEN IN 08712 20017 1 7 10 Parts List ...

Page 151: ...re shield gasket bottom 08713 20036 1 8 Front shield 08713 60006 1 9 RF source coupler IN cable 08713 20019 1 10 Cable test port 50 5022 1149 1 Cable test port y 75 5022 1152 1 11 Cable RF IN J4 08713 20013 1 12 Cable J3 coupler A 08713 20011 1 13 Cable LO source J1 08713 20010 1 14 Cable J2 coupler R 08713 20012 1 15 Coupler 50 5086 7936 1 Coupler 75 5086 7937 1 16 Connector RF output 50 86290 60...

Page 152: ... Cable RF IN to ATTEN IN 08713 20018 1 22 Cable ATTEN OUT to COUPLER IN 08713 20016 1 23 Cable ribbon options 8120 6475 1 24 Cable ribbon attenuator part of item 19 8120 6473 1 25 Cable AM DELAY MOD OUT to COUPLER IN 08713 20021 1 26 AM Delay modulator assembly 08712 60009 1 27 Cable RF IN to AM DELAY MOD IN 08713 20020 1 28 Cable AM DELAY MOD OUT to ATTEN IN 08713 20015 1 7 12 Parts List ...

Page 153: ...y and Cable Locations Item Description HP Part Number Quantity 1 A6 power supply assembly new 0950 2201 1 A6 power supply assembly R E 5062 3437 0 2 Fuse 5A 250V time lag 5 2 20 mm 2110 0882 2 3 Fan assembly 5062 3412 1 Parts List 7 13 ...

Page 154: ...ith board 2090 0319 1 3 Switch intensity control and cable assembly 08711 60023 1 4 Cable display 20C w headers 8120 5525 1 5 Lock washer 256 in ID 2190 0067 1 6 Nut 1 4 36 2950 0216 2 7 Washer Flat 125 in ID 3050 0116 4 8 Nut M3 0535 0031 4 9 Knob intensity 08711 40004 1 Bracket monitor board not shown 08712 00005 1 7 14 Parts List ...

Page 155: ...rmat 08712 10001 IBASIC Example programs disk 08712 10003 Firmware kit 08712 60013 ACCESSORIES 50 3 5 mm calibration kit HP 85033C opt 001 50 type N calibration kit HP 85032B E 50 3 5 mm accessory kit HP 11878A 50 type N accessory kit HP 11853A 50 BNC accessory kit HP 11854A 50 type N to TNC adapter kit HP 86212A 50 to 75 minimum loss pad HP 11852B 75 type N calibration kit HP 85036B E 75 type N a...

Page 156: ...067 IBASIC opt 1C2 upgrade kit 08711 60068 Firmware kit 08712 60013 AM delay kit does not include detectors or power splitter 08711 60062 SERVICE TOOLS Service tool kit Extender board assembly Two SMB extension cables 12 inches long 30 cm Modi ed 5 16 inch wrench Non shielded display ribbon cable 6 inch 150 mm Semi rigid coaxial extender cable Voltage reference source 08712 60012 Spare parts kit i...

Page 157: ...f them you must rst erase the information in ALL of the EPROMs Therefore you MUST have a rmware disk available to update correction constants because you cannot make a rmware disk yourself The gure below illustrates the ow of correction constants in the analyzer Figure 8 1 Correction Constants Flow by Keystroke and Cycling Power Correction Constants and Firmware 8 1 ...

Page 158: ...revious CCs from a Disk after Replacing the A2 CPU Board Perform and check step 2 skip this step if the A2 CPU was supplied with the correct version of rmware already installed Set Serial Number Adjustment in the Adjustments chapter if required step 3 Installing Correction Constants To Replace Suspected Incorrect CCs Perform and check step 2 Updating or Restoring Firmware step 3 Installing Correct...

Page 159: ... Correction Constants Correct for ROM Appears to be Blank message being displayed at power up Step 2 Updating or Restoring Firmware Step 3 Installing Correction Constants from Disk Correct for Warning No Correction Constants Installed being displayed at power up Step 3 Installing Correction Constants from Disk Step 1 Storing Correction Constants to Disk 1 Insert a formatted disk into the internal ...

Page 160: ...s the CCs from disk into RAM Upgrading Firmware To upgrade your analyzer s rmware you need two disks a rmware disk and a correction constant CC disk Both disks are necessary because Correction constants are stored in EPROM with rmware The old rmware must be erased before the new rmware can be stored EPROM can only be erased all at once not partially A rmware disk is shipped with each analyzer New ...

Page 161: ... NNNNNNNNNNNNNNNNNNNNNNN Service NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Update Corr Const NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN Load CC From Disk to load the correction constants into RAM Note With some future rmware revisions you may see a warning message indicating that the correction constants just loaded were made with a di erent rmware revision In this case it m...

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Page 163: ...e analyzer are developed this manual may need to be modi ed to apply to those future versions Information provided in this chapter will then allow you to adapt this manual to the earlier versions if necessary As there are presently no new versions of the analyzers there is no information provided here at this time Previous Serial Numbers 9 1 ...

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Page 165: ...f not correctly performed or adhered to would result in damage to or destruction of the instrument Do not proceed beyond a caution note until the indicated conditions are fully understood and met Warning Warning denotes a hazard It calls attention to a procedure which if not correctly performed or adhered to could result in injury or loss of life Do not proceed beyond a warning note until the indi...

Page 166: ...vicing instructions are for use by quali ed personnel only To avoid electrical shock do not perform any servicing unless you are quali ed to do so Warning The opening of covers or removal of parts is likely to expose dangerous voltages Disconnect the instrument from all voltage sources while it is being opened Warning The power cord is connected to internal capacitors that may remain live for 10 s...

Page 167: ...of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modi cation or misuse operation outside of the environmental speci cations for the product or improper site preparation or maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED HEWLETT PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED...

Page 168: ...pment for Service If you are sending the instrument to Hewlett Packard for service ship the analyzer to the nearest HP service center for repair including a description of any failed test and any error message Ship the analyzer using the original or comparable anti static packaging materials A listing of Hewlett Packard sales and service o ces is provided in this chapter 10 4 Safety Warranty and A...

Page 169: ...nue Du Canada Hewlett Packard Strasse 1217 Meyrin 2 Geneva Zone D Activite De Courtaboeuf 6380 Bad Homburg v d H Switzerland F 91947 Les Ulis Cedex Germany 41 22 780 8111 France 49 6172 16 0 33 1 69 82 60 60 Great Britain Hewlett Packard Ltd Eskdale Road Winnersh Triangle Wokingham Berkshire RF11 5DZ England 44 734 696622 INTERCON FIELD OPERATIONS Headquarters Australia Canada Hewlett Packard Comp...

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Page 171: ...ement 3 13 analog bus menu 5 10 analog bus nodes listing 5 10 array listing 5 8 attenuator replacement 3 13 automated performance test required equipment 1 10 auxiliary input correction adjustment 2 18 B B amplitude correction adjustment 2 28 B amplitude correction adjustment 2 22 BootROM version 5 7 C calibration data arrays view 5 12 category 1 failures dead or no response 4 5 error messages 4 5...

Page 172: ...ptions menu 5 10 measurement port speci cations 1 2 more SVC utilities menu 5 12 N normal power up sequence 4 4 O operational check 1 5 9 operator s check 1 5 9 output power speci cations 1 2 P part number service kit 4 2 parts accessories 7 15 16 cabinet 7 15 cable locations 7 1 CPU assembly 7 4 CPU cable locations 7 4 display assembly 7 13 display assembly cables 7 13 documentation 7 16 document...

Page 173: ...A5 receiver assembly 3 9 A6 power supply assembly 3 11 A7 display assembly 3 12 A8 3 5 internal disk drive assembly 3 13 AM delay modulator 3 13 attenuator 3 13 required tools 3 1 S safety 10 1 cautions 10 1 symbols 10 1 warnings 10 1 warranty 10 3 sales and service o ces 10 4 SCPI commands softkey 5 14 summary 5 14 selecting an array 5 8 self tests 4 9 service sales and service o ces 10 4 shipmen...

Page 174: ...stem theory 6 1 T theory of operation 6 1 CPU assembly 6 2 di erences between HP 8711 12B and HP 8713 14B 6 7 digital control 6 2 disk drive assembly 6 3 display assembly 6 3 fractional N reference assembly 6 4 front panel assembly 6 2 functional group 6 2 introduction 6 1 power supply assembly 6 2 receiver 6 6 receiver assembly 6 8 source 6 4 source assembly 6 4 system theory 6 1 transmission B R...

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