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HP 70908A, Service Manual

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HP 70908A Service Manual Download Page 188

A

djustment

20.

Lock

Range

Measurement

T

est

Equipment

Preferred

Model

Numbers

Controller

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HP

9000

Series

200/300

controller

Mainframe

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HP

70001A

mainframe

Local

oscillator

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HP

70900A/B

local

oscillator

source

Synthesized

source

(optional)

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HP

8663A

synthesized

signal

generator

External

reference

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Refer

to

\External

Frequency

Reference

"

in

Chapter

6.

Precision

DVM

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HP

3458A

digital

multimeter

Cable

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HP

10503A

122

cm

(48

in)

50

coax

UG-88C/U

BNC(m)

to

BNC(m)

Cable

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HP

85680-60093

123

cm

(48.4

in)

50

BNC(m)

to

SMB(f)

A

dapter

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HP

1251-2277

50

BNC(f)

to

dual

banana

plug

A

dapter

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HP

1250-1292

50

BNC(f)

to

alligator

clips

A

dapter

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HP

1250-0780

50

N(m)

to

BNC(f)

T

est

cover

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HP

5022-1150

2nd

converter

test

cover

Extender

module

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HP

70001-60013

extender

module

The

purpose

of

this

adjustment

procedure

is

to

check

the

RF

section

2nd

converter

lock

range

.

Note

Before

performing

this

adjustment,

verify

completion

of

the

following:

A

djustment

15.

Search

Oscillator

Duty

Cycle

and

P

eriod

A

djustment

16.

Search

Oscillator

Square

W

ave

Min/Max

A

djustment

17.

Search

Oscillator

Tune

Line

P

eak

1.

Set

the

mainframe

line

switch

to

OFF

.

2.

Remove

the

HP

70908A

RF

section

from

the

mainframe

.

3.

Install

the

extender

module

in

the

mainframe

and

connect

the

HP

70908A

RF

section

to

the

extender

cable

.

4.

Connect

the

equipment

as

shown

in

Figure

7-41.

5.

Set

the

mainframe

line

switch

to

ON

and

allow

at

least

30

minutes

initial

warmup

before

starting

the

adjustment.

6.

Load

and

run

A

djustment

20.

Lock

Range

Measurement.

Refer

to

Chapter

2

for

information

about

running

the

software

.

The

synthesized

signal

generator

initially

provides

299.35

MHz

at

the

DUT

300

MHz

IN.

The

DVM

connects

to

A9TP1,

2nd

converter

PLL

amplier

output.

The

signal

generator

frequency

decrements

in

0.01

MHz

steps

until

the

PLL

unlocks;

the

frequency

then

increments

in

0.01

MHz

steps

until

the

PLL

locks

.

The

test

compares

the

lock

frequency

with

the

test

limit.

If

the

lower

lock

frequency

meets

the

test

limit,

a

routine

stores

the

associated

DVM

measurement.

T

o

determine

the

upper

lock

frequency

and

voltage

,

the

test

repeats

with

a

synthesized

signal

generator

set

to

300.6

MHz.

Adjustment

Procedures

7-49

Summary of Contents for 70908A

Page 1: ...he Agilent website in an effort to help you support your product This manual provides the best information we could find It may be incomplete or contain dated information and the scan quality may not be ideal If we find a better copy in the future we will add it to the Agilent website Support for Your Product Agilent no longer sells or supports this product You will find any other available produc...

Page 2: ...Service Guide HP 70908A RF Section ABCDE HP Part No 70908 90193 Printed in USA April 1997 Edition A 0 0 ...

Page 3: ...this material Restricted Rights Legend Use duplication or disclosure by the U S Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 for DOD agencies and subparagraphs c 1 and c 2 of the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 for other agencies c Copyright Hewlett...

Page 4: ...another country Hewlett Packard warrants that its software and rmware designated by Hewlett Packard for use with an instrument will execute its programming instructions when properly installed on that instrument Hewlett Packard does not warrant that the operation of the instrument or software or rmware will be uninterrupted or error free Limitation of Warranty The foregoing warranty shall not appl...

Page 5: ...N sign until the indicated conditions are fully understood and met WARNING The WARNING sign denotes a hazard It calls attention to a procedure which if not correctly performed or adhered to could result in injury to the user Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met DANGER The DANGER sign denotes an imminent hazard to people It warns the reade...

Page 6: ...he protective conductor inside or outside of the instrument is likely to make the instrument dangerous Intentional interruption is prohibited For continued protection against re hazard replace fuse only with same type and ratings type nA nV The use of other fuses or materials is prohibited WARNING Before this instrument is switched on make sure it has been properly grounded through the protective ...

Page 7: ...Servicing at a Glance vi ...

Page 8: ...ide is part of an Option OB3 package which includes HP 70908A Service Guide HP 70908A Component Level Information Packages Module veri cation software disks Tools needed Before servicing refer to Chapter 5 for a list of the tools and accessories that may be needed during servicing Antistatic precautions Electrical components are easily damaged by small amounts of static electricity If possible wor...

Page 9: ... performance when assemblies are changed repaired or adjusted Chapter 7 contains the setups for all adjustment procedures that are used to optimize module performance when assemblies are changed repaired or adjusted Chapter 8 contains the setups for all module veri cation tests that are used to optimize module performance when assemblies are changed repaired or adjusted Chapter 9 contains procedur...

Page 10: ...ings De ned 2 7 Final Tests De ned 2 7 Single Tests De ned 2 8 Printing Test Results 2 8 Menus 2 9 Menu Structure 2 9 Edit and Command Screen Menus 2 9 Edit Screen Menus 2 9 Command Screen Menus 2 9 Cursor Keys and Menu Selections 2 10 Main Menu 2 11 Mass Storage Menu 2 11 Mass Storage Menu Edit Screen 2 12 Mass Storage Menu Command Screen 2 12 Parameter Menu 2 12 Parameter Menu Edit Screen 2 12 P...

Page 11: ...9 The Troubleshooting Tool Program 4 50 Performing Related Adjustments and Veri cation Tests 4 51 Overall Block Diagram of RF Section 4 55 5 Recommended Test Equipment Tables Specialized Test Equipment ET 5 3 6 System Calibration External Frequency Reference 6 2 Test System Calibration 6 6 7 Adjustment Procedures Before You Make Adjustments 7 2 Overall Adjustment Equipment Setup 7 3 Adjustment 01 ...

Page 12: ... 18 Test 09 Image Rejection 8 20 Test 10 IF Rejection 8 22 Test 11 2nd Converter Startup 8 24 Test 12 IF Sub Harmonics 8 25 Test 13 Residual Responses 8 27 Test 14 Miscellaneous Residual Responses 8 29 Test 15 321 4 MHz IF Out Frequency Response 8 31 Test 16 21 4 MHz IF Frequency Response 8 33 Test 17 Step Gain 8 35 Test 18 Gain Compression 8 37 Test 19 Aux LO Power and Harmonics 8 39 Test 20 Diag...

Page 13: ... RF 1st Converter 9 41 A16 Low Pass Filter 9 43 A17 Low Pass Filter 9 45 10 Overall Parts Identi cation Drawings Major Cables 10 2 Front View Identi cation 10 5 Rear View Identi cation 10 6 Top View Identi cation 10 7 Bottom View Identi cation 10 8 Side View Identi cation 10 9 Left Side Cover Removed Identi cation 10 11 Right Side Cover Removed Identi cation 10 14 Index Contents 4 ...

Page 14: ...e 6 4 6 4 Using an HP 8566B Spectrum Analyzer and a House Standard 6 5 6 5 Synthesized Source Calibration Test Setup 6 6 6 6 Microwave Source Calibration Test Setup 6 7 6 7 Spectrum Analyzer Reference Calibration Test Setup 6 8 6 8 Spectrum Analyzer IF Calibration Test Setup 6 8 6 9 Spectrum Analyzer RF Calibration Test Setup 6 9 6 10 Flatness Calibration and Veri cation Test Setup 6 10 6 11 Retur...

Page 15: ...tment 18 Phase Lock Check 7 44 7 39 Equipment Setup for Adjustment 19 VCO Tune Range Preliminary Check 7 46 7 40 Locations for Adjustment 19 VCO Tune Range Preliminary Check 7 46 7 41 Equipment Setup for Adjustment 20 Lock Range Measurement 7 48 7 42 Locations for Adjustment 20 Lock Range Measurement 7 48 7 43 Equipment Setup for Adjustment 21 Mixer Bias 7 50 7 44 Locations for Adjustment 21 Mixer...

Page 16: ...ement 2 or 2 9 8 9 6 Bandpass Filter Removal Replacement 1 or 2 9 10 9 7 Bandpass Filter Removal Replacement 2 or 2 9 11 9 8 A1 Leveling Ampli er Removal Replacement 9 13 9 9 A2 LO Multiplier Removal Replacement 9 15 9 10 A3 SYTFMD Removal Replacement 9 17 9 11 A4 Input Attenuator Removal Replacement 1 of 2 9 19 9 12 A4 Input Attenuator Removal Replacement 2 of 2 9 20 9 13 A5 VCO Sampler Removal R...

Page 17: ... 10 10 10 9 Overall Parts Identi cation Drawing Left Side View and Cover Removed 1 of 2 10 12 10 10 Overall Parts Identi cation Drawing Left Side View and Cover Removed 2 of 2 10 13 10 11 Overall Parts Identi cation Listing Right Side View A10 Power Supply Driver Facing Down and Cover Removed 10 15 Contents 8 ...

Page 18: ...nded Test Equipment 5 1 5 2 Tune Span ET Parts Listing 1 5 V GHz 5 5 10 1 HP 70908A RF Section Cables 10 2 10 2 Overall Parts Identi cation Listing Front View 10 5 10 3 Overall Parts Identi cation Listing Rear View 10 6 10 4 Overall Parts Identi cation Listing Top View 10 7 10 5 Overall Parts Identi cation Listing Bottom View 10 8 10 6 Overall Parts Identi cation Listing Side View 10 9 10 7 Overal...

Page 19: ......

Page 20: ... get you started so that your RF section is serviced properly This chapter answers the questions What Is Servicing and When Is Servicing Needed It then describes the procedures used to return your RF section to Hewlett Packard for servicing Getting Started 1 1 ...

Page 21: ... speci cations This service guide provides information related to testing adjusting troubleshooting and repairing your RF section it also provides information on module veri cation tests These sets of tests are used during servicing For information related to system veri cation of operation tests refer to the HP 70000 Modular Spectrum Analyzer Installation and Veri cation Manual and for informatio...

Page 22: ...ection When a module is manufactured by Hewlett Packard it is given a unique serial number This serial number is attached to a label on the front frame or front panel of the module A serial number label is in two parts Refer to Figure 1 1 The rst part makes up the serial number pre x and consists of four digits and a letter The second part makes up the serial number su x and consists of the last v...

Page 23: ...da Highway Hewlett Packard GmbH Kirkland Quebec H9J 2X8 Colorado Hewlett Packard Strasse Canada Hewlett Packard Co 61352 Bad Homburg 514 697 4232 24 Inverness Place Germany East Englewood CO 80112 49 6172 16 0 Japan 303 649 5000 Yokogawa Hewlett Packard Ltd Great Britain 1 27 15 Yabe Sagamihara Georgia Hewlett Packard Ltd Kanagawa 229 Japan Hewlett Packard Co Eskdale Road Winnersh Triangle 81 427 ...

Page 24: ...ontainer Styrene pellets can also cause equipment damage by generating static electricity or by lodging in fan motors 2 Place the RF section in its original packaging materials If the original packaging materials are not available you can contact a Hewlett Packard sales and service o ce to obtain information on packaging materials or you may use an alternative packing material referred to as bubbl...

Page 25: ...g for a 2 8 Module RF Section Item Description HP Part Number Qty 1 Carton outer 5180 8479 1 2 Carton inner 9211 4781 1 3 Carton sliders 5180 2369 1 4 Foam inserts 4208 0493 1 5 Foam pads 5180 8469 2 1 6 Getting Started ...

Page 26: ... slave modules that have an HP 70900A B local oscillator source as a master This software is controlled by a softkey driven menu and user interface screens The disks included with this module provide programs that test whether the module meets its characteristics for system operation The HP 70000 Modular Spectrum Analyzer Installation and Veri cation Manual contains con guration information for pr...

Page 27: ...els do not match the ones used in text Keyboard Key Labels Alternate Key Labels 4EXECUTE5 4RETURN5 4ENTER5 4RETURN5 4RUN5 press 4SYSTEM5 then NNNNNNNNNNN RUN 4CONTINUE5 press 4SYSTEM5 then NNNNNNNNNNNNNNNNNNNNNNNNNN CONTINUE Computer Language Compatibility Module Veri cation Software runs on HP BASIC 4 0 or later with the BIN les in RAM that are listed below A procedure for loading HP BASIC is pro...

Page 28: ...ty Module Veri cation Software supports any HP IB printer however many of the printed test results require a graphics printer Graphical test results are not output to a non graphics printer Module Veri cation Software 2 3 ...

Page 29: ... modular spectrum analyzer system to the port labeled HP IB SELECT CODE 7 2 Connect the HP IB cables from the test equipment to the computer s HP IB SELECT CODE 7 port 3 Use a HP 10833D 0 5 meter HP IB cable or similar cable to connect the external disk drive s HP IB to the HP IB SELECT CODE 7 port Note Occasionally disk drives exhibit unpredictable behavior when sharing the HP IB with instruments...

Page 30: ...ERF 1 and press 4EXECUTE5 or 4Return5 The software version number appears in the upper right hand side of the initial display Speci c numbers vary but the software version number looks similar to the following Rev B 02 01 Depending on the version of HP BASIC that you are running you may encounter an error such as ERROR 84 in 3072 Record not found If an error such as this occurs edit the number of ...

Page 31: ...for passive devices of a given serial number each time you begin testing The program displays any additional passive devices requiring serial numbers and calibration data Serial numbers are only required for passive devices that need their calibration data stored on the Operating Disk You are prompted to enter serial numbers for these devices only After all drivers have loaded and all required cal...

Page 32: ...ect the module to test that matches the software you already have loaded Otherwise press NNNNNNNNNNNNNNNNN ABORT Error Messages or Warnings De ned There are three kinds of error messages or warnings generated by the program One appears brie y at the bottom of the CRT display The program then goes automatically to a menu that asks you for corrections or modi cations Another type of error message be...

Page 33: ...gram automatically prints the test results The printout includes a title and summary page The title page lists the following data Module software used and the test date Serial number of the module tested Firmware version of the module tested Power line frequency Test person s identi cation Test equipment model numbers and names addresses and ID or serial number The Summary Page lists total test ti...

Page 34: ...test mode accessing the help screen accessing the Main Menu and so on Edit and Command Screen Menus The following softkeys are present for menus that appear in Figure 2 1 through Figure 2 4 Not all of the menus have edit screens but all have command screens When softkey labels are written in lowercase letters a sub level softkey menu exists for that particular softkey Softkey labels written in upp...

Page 35: ...you were when you pressed NNNNNNNNNNNNNNNNN ABORT NNNNNNNNNNNNNN HELP accesses menu and softkey descriptions Listed below are softkey selections and functions available via this softkey NNNNNNNNNNNNNNNNNNNNNNNNNNNNN NEXT PAGE takes you to the top of the next available menu page NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN PREVIOUS PAGE returns you to the top of the preceding menu page NNNNNNNNNNNNNNN...

Page 36: ...t drive Mass Storage Menu The BASIC operating system can use a number of mass storage devices These include internal disk drives external disk drives and SRM systems You are prompted to assign the areas where the program stores system and operation data You do this by assigning Volume Labels to an msus mass storage unit speci er An msus is a string expression that points to a mass storage location...

Page 37: ...NNNN STORE to save the edited data Saving Mass Storage Menu data for the rst time causes an error message prompting you to create a le Do this simply by pressing NNNNNNNNNNNNNNNNNNNN CREATE Next press NNNNNNNNNNNNNNNNNNNNNNNNNNNNN main menu to return to the Main Menu screen or press NNNNNNNNNNNNNN EDIT and return to the Mass Storage Menu edit screen Parameter Menu You may determine some operating ...

Page 38: ...n the cursor to the left hand side of a User Line in the menu Press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN SELECT TOGGLE 2 The prompt Enter additional information appears Type in your message up to 30 characters per line then press 4ENTER5 3 After you have entered your message reposition the cursor at Number lines added Enter the number of user lines your message occupies then press 4ENTER5 Par...

Page 39: ...mber for the device The calibration data for a passive device is stored on the Operating Disk Passive devices tagged Not Available in the address column cause Missing ETE to be printed next to the test names on the test results that are output for any procedure that required the missing device Tests tagged with Missing ETE are not performed 3 Edit a SERIAL NUMBER by locating the cursor beside the ...

Page 40: ...e Select Passive Device screen Refer to the following section for more information Edit Calibration Data The Select Passive Device screen displays all passive devices needing calibration data entered Press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN edit cal data to enter the Select Passive Device screen The program requires calibration data for some of the passive devices listed in the Equipment Me...

Page 41: ... program HP MSIB Address Menu The HP MSIB Address Menu lists the names and HP MSIB addresses of the modules in the HP 70000 Series modular spectrum analyzer system that you may select to test The HP MSIB address of the master and the system are the same In other words the address of the master module determines the address of the system For information on con guring the software to test a speci c ...

Page 42: ...ssage stating that calibration data for passive devices is missing may also appear If the correct Operating Disk is in the default drive store the calibration data there Press NNNNNNNNNNNNNNNNNNNN CREATE to build the data le After the problem is cleared the Test Menu is displayed Test Menu Command Screen The Test Menu only has a command screen It deviates from the command screen formats previously...

Page 43: ...e selecting tests until you are ready to begin testing It is acceptable to select the same test for repeated testing Press NNNNNNNNNNNNNNNNNNNNNNNNNN END LIST to start the test sequence During testing the following softkeys are also available NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN END SEQUENCE interrupts the test sequence at the end of the test in progress then displays the Test Menu n NNNNNNNNNNN...

Page 44: ...Figure 2 1 Main Menu Softkeys Module Veri cation Software 2 19 ...

Page 45: ...Figure 2 2 Mass Storage Menu and Parameter Menu Softkeys 2 20 Module Veri cation Software ...

Page 46: ...Figure 2 3 Equipment Menu and HP MSIB Map Screen Menu Softkeys Module Veri cation Software 2 21 ...

Page 47: ...Figure 2 4 Test Menu Softkeys 2 22 Module Veri cation Software ...

Page 48: ...or subprogram to appear on screen You are returned to the Test Menu Equipment list is not acceptable You attempted to enter the Test Menu but the program could not locate all the instruments for which you have speci ed HP IB addresses Verify that the indicated equipment is turned on then return to the Equipment Menu edit screen to verify accuracy of addresses that are ashing in either the address ...

Page 49: ...rect the problem then do one of the following Press NNNNNNNNNNNNNNNNNNNN REPEAT to try again Press NNNNNNNNNNNNNNNNNNNN CREATE to create a new le Press NNNNNNNNNNNNNNNNN ABORT to return to the Main Menu ERROR MESSAGE Attempt to Edit Mass Storage failed Your edits to the Mass Storage Menu were not valid Return to this menu and correct the errors ERROR MESSAGE Attempt to store Mass Storage failed Yo...

Page 50: ...not verify the DUT at the speci ed HP IB address First check the address If the address is correct cycle the main power of the system under test ERROR MESSAGE DUT was not at address in the equipment list DUT was expected at address ____ The DUT is not at the speci ed address or HP IB is at fault or main power is o on the DUT Press NNNNNNNNNNNNNNNNN ABORT then return to the Equipment Menu to verify...

Page 51: ...Read ____ data from file ____ failed There is a problem with the data le on the Operating Disk Correct the problem then either press NNNNNNNNNNNNNNNNNNNN REPEAT to try again or 4CONTINUE5 to use default values ERROR MESSAGE Selected instrument under test is ____ but the software supports the ____ The module entered in the HP MSIB map is not currently supported by software Either load the correct s...

Page 52: ... incorrect press NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN mass storage to return to the Mass Storage Menu From here you can indicate a di erent mass storage medium for the Volume in question FORMAT ERROR Observe date format and character position You entered the date time in an unacceptable format Enter date time in the format dd mmm yyyy and hh mm then press 4ENTER5 Hdw Broken Actual test results f...

Page 53: ...y of your system or o load some data to make room for the program The ____ at address ____ was not found on HP IB When Verify HP IB is set to ON in the Parameter Menu this error message displays the ETE with the address that is either missing or not set to ON The 436A is in lowest range waiting 10 seconds The current power measurement requires the lowest power meter range Program execution will re...

Page 54: ... For example the TOI test will not be run if you assign a single HP 3335A synthesizer level generator as both the required level generator and the required general source WARNING String is too long It has been truncated You entered too many characters in a user s line of the Parameter Menu edit screen Select the line and enter 30 or fewer characters Write protected You attempted to store data on a...

Page 55: ......

Page 56: ...experiencing any of the symptoms presented in this chapter refer to Performing Related Adjustments and Veri cation Tests in Chapter 4 to determine which adjustments and veri cation tests must be performed and also Table 5 1 for a list of recommended test equipment to use when assemblies are changed repaired or adjusted Note If your RF section is still in warranty or if you do not wish to perform t...

Page 57: ... is powered on Check that the HP 70000 Series modular spectrum analyzer system display and mainframe are plugged into the proper ac line voltage Check that the line socket has ac line voltage Check that the line voltage selector switch is set to the correct voltage for the ac line voltage being used The line voltage selector switch is located on the left side of the HP 70004A color display on the ...

Page 58: ...er 1 Table 3 1 Default HP MSIB Address Map Column 18 Column 19 Column 20 Row 7 blank HP 70310 blank Row 6 RF sections1 HP 70300 HP 70620 or HP 706212 Row 5 HP 70907 HP 70301 blank Row 4 HP 70903 blank HP 70810 Option 850 Row 3 HP 70911 HP 70620 or HP 706213 HP 70810 Row 2 HP 70700 HP 70600 or HP 70601 blank Row 1 HP 70902 blank blank Row 0 HP 70900 blank blank 1 This includes HP 70904A RF section ...

Page 59: ... extender cable Set the mainframe line switch to ON Measure the 5 V supply at A12U17 pin 3 If 5 V is present there is a problem with the A12 controller If 5 V is not present remove the ribbon cable to the A14 front panel board Remeasure the voltage at A12U17 pin 3 If 5 V is present the A14 front panel board is loading down the 5 V If 5 V is not present check A12U17 pin 1 for 8 V unregulated If the...

Page 60: ... located in their designated coordinates If front panel keys are not responding and the address map cannot be checked power down the system pull out each module and check its address setting by looking at its address switches All modules should conform to the required coordinates on the address map Refer to Table 3 1 If your system contains more than one mainframe check that the HP MSIB cables are...

Page 61: ......

Page 62: ...mation on preparing a static safe work station and then it presents a set of troubleshooting procedures that can be used to optimize repair time Adjustment and veri cation tests that must be performed when assemblies are changed repaired or adjusted are presented at the end of the chapter Troubleshooting 4 1 ...

Page 63: ...c Safe Work Station These two types of ESD protection must be used together Refer to Table 4 1 for a list of static safe accessories and their HP part numbers CAUTION Do not touch the edge connector contacts or trace surfaces with bare hands Always handle board assemblies by the edges Do not use erasers to clean the edge connector contacts Erasers generate static electricity and degrade the electr...

Page 64: ... board assemblies and electronic components only at static safe work stations Store or transport PC board assemblies and electronic components in static shielding containers PC board assembly edge connector contacts may be cleaned by using a lintfree cloth with a solution of 80 electronics grade isopropyl alcohol and 20 deionized water This procedure should be performed at a static safe work stati...

Page 65: ...EBUG ON OFF key to turn on debug mode and determine exactly which command is generating the error 2 Check for missing terminators and the proper number of parameters 3 Verify that delimited strings are properly ended 4 Refer to the programming manual for proper syntax 2006 Param out of range A change was made to an instrument setting that was beyond the capabilities of the hardware This could be r...

Page 66: ...tive If that point goes slightly positive it will cause the output of A13U4 to swing all the way to its positive rail This voltage is sent to the A12 controller where it is monitored by A12U19 TTL low error condition To solve this problem 1 Check that the LO IN signal is actually getting power to the RF section This normally comes from the HP 70900B local oscillator source LO The power level shoul...

Page 67: ...om Hewlett Packard Refer to If You Want Hewlett Packard to Service Your RF Section in Chapter 1 7009 ROM 2 check error This hardware error occurs when there is a di erence between the computed checksum and programmed checksum of the upper half of the addresses of A12U7 To solve this problem 1 Replace A12U7 2 If problem remains troubleshoot the A12 controller Refer to Troubleshooting the A12 Contro...

Page 68: ...failures section in the HP 70900B Service Guide If there is no problem found using the HP 70900B Tune Span o set adjustment procedure run the YTO linearity veri cation test in the HP 70900B Service Guide If the YTO linearity test fails refer to the HP 70900B frequency control reference voltage adjustments and the YTO frequency endpoints adjustment Then rerun the YTO linearity test If it still fail...

Page 69: ...ntroller where the error condition is reported To solve this problem 1 Verify that the Tune Span signal is actually getting to the RF section 2 If correct check the output of A10U17 pin 13 3 If the output is a negative voltage there is a problem on the A12 controller Refer to Troubleshooting the A12 Controller 4 If it is not a negative voltage troubleshoot the A10 power supply driver Refer to Trou...

Page 70: ... function block B Refer to the A13 ALC bias schematic diagram 2 If necessary obtain service from Hewlett Packard Refer to If You Want Hewlett Packard to Service Your RF Section in Chapter 1 If Adjustment 03 Reference Voltage Fails If the reference voltage cannot be adjusted within test limits the failure is most likely the A10 power supply driver To solve this problem 1 Troubleshoot the A10 power ...

Page 71: ... Packard to Service Your RF Section in Chapter 1 If Adjustment 07 SYTFMD Main Coil Preset or Adjustment 09 SYTFMD Main Coil Alignment Fails If either adjustment fails analyze the failure to determine the location of the malfunction To solve this problem 1 Perform Adjustment 06 SYTFMD O set Coil 2 If Adjustment 07 SYTFMD Main Coil Preset still fails refer to troubleshooting the main coil drive in t...

Page 72: ...ection is good the voltage at A9J4 pin 2 Vcc will measure about 10 7 V and the voltage at A9J4 pin 3 Vee will measure about 02 7 V The assembly must be disassembled to verify the contacts for A9J4 pin 1 and A9J2 pin 3 2 If the VCO oscillates but cannot reach 3 3 GHz from the low side loosen all of the screws holding the cavity block Push the whole cavity block towards the front and bottom of the m...

Page 73: ...ycle and Period Fails To solve this problem 1 If the search oscillator does not work the problem is most likely A9U1 2 If necessary obtain service from Hewlett Packard Refer to If You Want Hewlett Packard to Service Your RF Section in Chapter 1 If Adjustment 16 Search Oscillator Square Wave Min Max Fails To solve this problem 1 Perform Adjustment 15 Search Oscillator Duty Cycle and Period 2 If thi...

Page 74: ...A9 2nd converter PLL If the 300 MHz signal is present the A5 VCO sampler is probably at fault or the spring contacts are open To verify that the spring contacts are making a good connection refer to the procedure in Adjustment 11 VCO 2nd LO Frequency Amplitude If no failure is found perform Adjustment 11 VCO 2nd LO Frequency Amplitude 7 If necessary obtain service from Hewlett Packard Refer to If ...

Page 75: ...too far or not far enough Feedthrough capacitor C1 from the mixing diode to the matching network can a ect the bandpass shape It is usually manifest by a skewing of the bandpass to one side or another and higher than normal conversion loss 2 If necessary obtain service from Hewlett Packard Refer to If You Want Hewlett Packard to Service Your RF Section in Chapter 1 If Adjustment 23 VCO Tune Range ...

Page 76: ... A11 last converter Refer to Troubleshooting the A11 Last Converter 3 If necessary obtain service from Hewlett Packard Refer to If You Want Hewlett Packard to Service Your RF Section in Chapter 1 If Adjustment 26 Noise Figure 2nd Converter Fails To solve this problem 1 Unless the Adjustment 11 VCO 2nd LO Frequency Amplitude also fails the problem is usually the A7 2nd mixer diode 2 A poorly tuned ...

Page 77: ...L0 2L0 or 4L0 2 7 to 22 GHz verify that the LO input signal from the multiplier to the A3 SYTFMD is 14 dBm 12 5 dBm in 4L0 band If it is not troubleshoot the A2 LO multiplier Refer to Troubleshooting the A2 LO Multiplier Anything between the RF input connector and the A3 SYTFMD can cause a failure in these bands 4 If necessary obtain service from Hewlett Packard Refer to If You Want Hewlett Packar...

Page 78: ...s 2 If test falls within the test limits of the 21 4 MHz output port troubleshoot the A11 last converter Refer to Troubleshooting the A11 Last Converter 3 If test does not fall within the test limits check the IF path until the faulty assembly is found 4 If necessary obtain service from Hewlett Packard Refer to If You Want Hewlett Packard to Service Your RF Section in Chapter 1 If Test 08 Residual...

Page 79: ...onverter startup veri cation routines fail perform Adjustment 22 2nd Converter Bandpass Filter Tune 2 If necessary obtain service from Hewlett Packard Refer to If You Want Hewlett Packard to Service Your RF Section in Chapter 1 If Test 12 IF Sub Harmonics Fails To solve this problem 1 Troubleshoot the A11 last converter 10 7 MHz trap A11L10 A11C28 and 321 4 MHz bandpass lter 2 If necessary obtain ...

Page 80: ...onverter Bandpass Filter Tune 2 If 1L0 band fails perform Adjustment 06 SYTFMD O set Coil and Adjustment 09 SYTFMD Main Coil Alignment 3 If necessary obtain service from Hewlett Packard Refer to If You Want Hewlett Packard to Service Your RF Section in Chapter 1 If Test 16 21 4 MHz IF Frequency Response Fails This test checks the overall lter response of the RF section IF output At 300 MHz in 1H0 ...

Page 81: ...and harmonics routines fail the failure is most likely caused by A1 leveling ampli er To solve this problem 1 Perform Adjustment 01 LOLA Gate Bias Adjustment 04 LOLA Power Out and Adjustment 05 LOLA Tuned Filter 2 If the test still fails its limits troubleshoot the A1 leveling ampli er 3 If A1J3 or A1J4 are heavily loaded down this test may also fail 4 If necessary obtain service from Hewlett Pack...

Page 82: ... Hewlett Packard to Service Your RF Section in Chapter 1 300 MHz present This test veri es the operation of the 300 MHz detector on the A11 last converter It also tests the error reporting circuits on the A10 power supply driver and the A12 controller To solve this problem 1 Troubleshoot a 7004 error code 2 If necessary obtain service from Hewlett Packard Refer to If You Want Hewlett Packard to Se...

Page 83: ...e the location of the malfunction To solve this problem 1 If the failure occurs in band 1H0 troubleshoot the A15 RF 1st converter Refer to Troubleshooting the A15 RF 1st Converter 2 If the failure occurs in bands 1L0 2L0 and 4L0 troubleshoot the A3 SYTFMD Refer to Troubleshooting the A3 SYTFMD 3 If test results are degraded by 10 dB troubleshoot the A4 input attenuator Refer to Troubleshooting the...

Page 84: ...ut return loss routines fail the failure is most likely the A11 last converter To solve this problem 1 Troubleshoot the A11 last converter Refer to Troubleshooting the A11 Last Converter 2 If necessary obtain service from Hewlett Packard Refer to If You Want Hewlett Packard to Service Your RF Section in Chapter 1 If Test 27 Wide IF Output Return Loss Fails If any LO input return loss routines fail...

Page 85: ...ure 2nd Converter 3 If this adjustment test fails perform Adjustment 25 Noise Figure Last Converter 4 If Adjustment 25 Noise Figure Last Converter passes the problem is probably the A15 RF 1st Converter Refer to Troubleshooting the A15 RF 1st Converter 5 High insertion loss of either the 321 4 MHz bandpass lter or the 1st IF lowpass lter may also be causing the failure 6 If necessary obtain servic...

Page 86: ...1 G2 G3 comes from the A13 ALC bias Perform Adjustment 01 LOLA Gate Bias Adjustment 04 LOLA Power Out and Adjustment 05 LOLA Tuned Filter If the power out of the A1 leveling ampli er is not 15 dBm or if the LOLA still goes unleveled there is a problem with the A1 leveling ampli er Voltage Reference The voltage reference out of the A1 leveling ampli er should be a nominal 00 3 V The purpose of this...

Page 87: ...der module and make all connections needed for spectrum analyzer operation Perform the following steps 1 On the HP 70000 Series modular spectrum analyzer system initiate an instrument preset and set the controls as follows Span 0 Hz press NNNNNNNNNNNNNN SPAN 0 NNNNNNNN Hz Pathlock ON press 4MENU5 NNNNNNNNNNNNNNNNNNNN config NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN PATHLOK ON LO START 3 GHz press 4MENU5 NN...

Page 88: ...Troubleshooting the A1 Leveling Ampli er Figure 4 2 Notch Filter Waveform Troubleshooting 4 27 ...

Page 89: ... is incorrect but the switch voltages are correct refer to Adjustment 08 Multiplier Power Leveling If the switch voltages are incorrect refer to A13 ALC bias troubleshooting Table 4 3 A2 Switch Logic Band Frequency Range GHz Switch 1 S1 pin 5 Switch 2 S2 pin 9 Switch 3 S3 pin 11 1H0 0000001 to 2 9 0 V 0 V 0 V 1L0 2 7 to 6 2 12 V 0 V 0 V 2L0 6 0 to 12 8 0 V 12 V 0 V 4L0 12 6 to 22 0 V 0 V 12 V Powe...

Page 90: ...START 3 NNNNNNNNNNN GHz LO STOP 6 6 GHz press NNNNNNNNNNNNNN STOP 6 6 NNNNNNNNNNN GHz Sweep time 5 s press 4MENU5 NNNNNNNNNNNNNNNNNNNN BW Swp NNNNNNNNNNNNNNNNNNNNNNN SWPTIME 5 NNNNN s 2 Set an oscilloscope to the following settings Display A vs B mode Channel A 0 5 V Div with 10 1 Probe Channel B 0 1 V Div with 10 1 Probe 3 Connect channel A of the oscilloscope to the A2 FLTR pin Connect channel B...

Page 91: ...gnal through a diode pair The resulting tune signal leaves the A3 SYTFMD at A3J11 and is ampli ed and integrated by the A10 power supply driver It then leaves the A10 power supply driver at J203 and is applied to the LO bandpass lter tune line Because the tune line changes the center frequency of the lter to maintain a 90 degree phase shift the center frequency will always track the LO frequency I...

Page 92: ...ng perform Adjustment 06 SYTFMD O set Coil and Adjustment 07 SYTFMD Main Coil Preset CAUTION The discriminator is extremely static sensitive Before proceeding refer to Preparing a Static Safe Work Station Perform the following procedure to verify that the output of the discriminator is greater than 0 2 V peak to peak into a 10k ohm load when swept through its range 1 On the HP 70000 Series modular...

Page 93: ...than 0 2 V peak to peak See Figure 4 5 for illustrations of possible waveforms If there are any problems with the amplitude of the discriminator output perform Adjustment 08 Multiplier Power Leveling If the module passes the procedure but there is still a problem with the waveform tune to the o ending frequency and verify that the power out of the A2 LO multiplier is greater than or equal to 12 5 ...

Page 94: ...Troubleshooting the A3 SYTFMD Figure 4 5 Discriminator Output Waveform Troubleshooting 4 33 ...

Page 95: ...attenuation is used attenuator sections two and four will be enabled To switch in section two control line SECT 2 20 will be 0 5 V and control line SECT 2 0 will be 25 V The control line voltages will be reversed on sections that are not enabled With 40 dB of attenuation SECT 1 10 will measure 25 V and SECT 1 0 will measure 0 5 V 1 If the switching logic is correct but the signal attenuation is no...

Page 96: ...OUT 5 Adjust LO ADJ VCO cavity tuning screw for an IF output frequency of 3300 MHz 61 MHz 6 If the oscillator will not adjust for an output frequency of 3300 MHz perform the following steps Measure the VCO bias voltages at J4 2 and J4 3 They should be 10 4 V and 02 7 V respectively If J4 2 measures 12 V or if J4 3 measures 012 V there may be no contact between the spring clips on the A5 and feedth...

Page 97: ...ty cycle is not 50 repeat steps 2 through 4 If the search oscillator is not working the failure is most likely A9U1 phase lock loop ampli er Search Oscillator Peak 1 Connect the oscilloscope between A9J4 1 and ground 2 Adjust R7 tune range pot for a square wave peak between 0 and 02 Vdc Phase Lock 1 Set the reference frequency to 300 MHz and then verify 2nd LO phase lock 2 Verify a stable 04 to 05...

Page 98: ...r a peak at center frequency 5 Tune IF ADJ 2 for a dip at center frequency Peaks on either side of the dip should be nearly the same amplitude 6 Tune IF ADJ 1 for a peak and an overall well shaped bandpass 7 Adjust A8L1 for overall bandpass atness and symmetry 8 If the 3 dB bandwidth limits and atness cannot be met adjust the input coupling connector for more or less coupling This will necessitate...

Page 99: ...0000 Series modular measurement system If the supply voltages are incorrect or if the fuse still blows the problem is on the A10 power supply driver If these problems do not occur turn o the power of the HP 70000 Series modular measurement system replace one cable and then turn the power back on Continue to replace one cable at a time until the problem shows and then troubleshoot the faulty assemb...

Page 100: ...vide frequency dependent closed loop gain BLOCK V controls the A3 SYTFMD temperature by reacting to temperature sensing information and changing its heater current BLOCKS O and A shorten lock acquisition time The search oscillator is enabled when the discriminator loop is unlocked BLOCK P integrates the discriminator frequency error information The output is applied to the YTF main coil to force a...

Page 101: ...State NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN MORE 3 of 4 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN poweron menu and NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN POWERON LAST 2 Set an oscilloscope to the following settings Channel A 0 2 V Div with a 10 1 probe Sweep time 0 2 s Div Trigger normal 3 Connect the oscilloscope to the source of A10Q1 It may be easier to connect the probe to the side of R9 connected ...

Page 102: ...A10J4 input of the A10 discriminator 2 Set a function generator to the following settings Function sine wave Frequency 500 Hz Amplitude 1 Vp p O set No dc o set 3 Connect a BNC tee HP 1250 0781 to the output of the function generator Connect a 50 ohm BNC load HP 11593A to one side of the BNC tee Connect a BNC to SMB cable from the other side of the BNC tee to A10J4 Connect a jumper wire from A10TP...

Page 103: ...ted sine wave with the values listed in Table 4 5 Table 4 5 Sine Wave Values at A10U5 Pin 7 HP 70000 Frequency Positive Peak Negative Peak 2 7 to 6 2 0 5 to 0 8 V 00 6 to 01 V 6 0 to 12 8 0 9 to 1 5 V 01 5 to 02 5 V 12 6 to 22 2 to 3 V 04 to 05 V The gain of the sine wave is a function of two parameters 1 attenuation provided by the A10U2A MUX selection and 2 the select gain of A10U5A Refer to Tab...

Page 104: ... The break points vary from module to module If the squared response is not present there is a problem on the A10 power supply driver Figure 4 7 Linearity Compensation Waveform A1 LOLA Filter Drive To observe the lter drive waveform place the module on an HP 70001 60013 extender module and make all connections needed for spectrum analyzer operation Perform the following steps 1 On the HP 70000 Ser...

Page 105: ...cal oscillator source sweep of 3 0214 to 6 5214 GHz the waveform should have a squared response approximately 6 V to 26 V and then remain at 26 V for the remainder of the sweep If the waveform is not present check for the trace at the collector of A10Q402 If it is not present at A10Q402 continue with step 5 5 On the HP 70000 Series modular measurement system press 4MENU5 NNNNNNNNNNNNNNNNN State NN...

Page 106: ...NN State NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN MORE 3 of 4 NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN poweron menu NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN POWERON LAST and then turn the power o Remove the LO INPUT cable from the rear panel of the HP 70908A RF section and the cable from A10J301 4 Turn on the power of the spectrum analyzer and check for the trace again at A10Q403 If the trace is now presen...

Page 107: ... for mixer A11U5 The LO signal is also sent to the 2nd converter A11J3 for use in phase locking the 3 3 GHz oscillator The signal path for the 321 4 MHz rear panel IF output is determined by the output select bit from the A12 controller The A11 last converter has two signal present detectors one detects the presence of 300 MHz another detects a signal in the 21 4 MHz IF path The 21 4 MHz detector ...

Page 108: ... the RF input of the module from any high power signals applied while the spectrum analyzer is o The supply is also used to disable the output from the ROM A12U7 during power down The A12 controller receives information from the HP MSIB master module and acts upon it accordingly The controller is responsible for the following functions under the control of the master element Attenuator settings La...

Page 109: ...ing When the LO input power to the A1 is low PIN diodes 1 and 2 are at minimum attenuation As the input power increases A13Q9 gradually biases PIN diode 2 to maximum attenuation leaving PIN diode 1 to respond to small changes in power LO gate bias is a voltage divider bias adjustment scheme Multiplier Leveling Circuit Tune the HP 70000 Series modular measurement system to a center frequency of 8 G...

Page 110: ...verter Troubleshooting the A15 RF 1st Converter The RF 1st converter should have the following conversion loss Frequency Range Typical Conversion Loss 100 Hz to 2 5 GHz less than 9 dB 2 5 to 2 9 GHz less than 12 dB Troubleshooting 4 49 ...

Page 111: ...e HP 70908A RF section to one of the four bands 1H0 1L0 2L0 or 4L LOCK DISC must follow selection of band 1L0 2L0 or 4L0 DIAGNOSTICS lists on controller display errors currently being generated by the HP 70908A RF section 321 4 IF selects the 321 4 IF output path from the last converter 21 4 IF selects the 21 4 IF output path from the last converter STEP GAIN ON enables the step gain circuit in th...

Page 112: ... to make an adjustment replace it with an HP 5022 1150 2nd converter test cover during testing to assure consistent ground connection and proper converter alignment A1 Leveling Ampli er Perform the following related adjustment procedures Adjustment 01 LOLA Gate Bias Adjustment 04 LOLA Power Out Adjustment 05 LOLA Tuned Filter Perform the following related veri cation tests All nal tests Test 19 Au...

Page 113: ...23 VCO Tune Range Final Perform the following related veri cation tests All nal tests Test 11 2nd Converter Startup A6 Isolator Perform the following related veri cation tests All nal tests A7 2nd Mixer Perform the following related adjustment procedures Adjustment 10 VCO Tune Line Voltage Adjustment 11 VCO 2nd LO Frequency Amplitude Adjustment 12 2nd Converter LO Feedthrough Adjustment 13 Sampler...

Page 114: ... All nal tests Test 11 2nd Converter Startup A9 2nd Converter PLL Perform the following related adjustment procedures Adjustment 10 VCO Tune Line Voltage Adjustment 11 VCO 2nd LO Frequency Amplitude Adjustment 12 2nd Converter LO Feedthrough Adjustment 13 Sampler IF Out DC Adjustment 14 Sampler IF Out AC Adjustment 15 Search Oscillator Duty Cycle and Period Adjustment 16 Search Oscillator Square W...

Page 115: ...up Test 15 321 4 MHz IF Out Frequency Response A13 ALC Bias Perform the following related adjustment procedures Adjustment 01 LOLA Gate Bias Adjustment 02 Multiplier Gate Bias Adjustment 05 LOLA Tuned Filter Adjustment 04 LOLA Power Out Adjustment 08 Multiplier Power Leveling Perform the following related veri cation tests All nal tests Test 19 Aux LO Power and Harmonics Test 21 LO Input Amplitude...

Page 116: ...Overall Block Diagram of RF Section Overall Block Diagram of RF Section Front page for Foldout Goes Here This is just a place holder Figure 4 9 Overall Block Diagram of RF Section Troubleshooting 4 55 ...

Page 117: ...Overall Block Diagram of RF Section Back page for Foldout Goes Here This is just a place holder 4 56 Troubleshooting ...

Page 118: ...zed source HP 8663A synthesized signal generator or HP 8662A synthesized signal generator Level generator HP 3335A synthesizer level generator Analyzers Calibrated spectrum analyzer HP 8566B spectrum analyzer upgraded with rmware version 16 7 85 or later Scalar network analyzer HP 8757A scalar network analyzer Detector 2 required HP 11664E detector Meters Excess noise source HP 346C broadband nois...

Page 119: ...red HP 1250 1292 50 BNC f to alligator clips HP 1251 2277 50 BNC f to dual banana plug HP 1250 0780 50 N m to BNC f 2 required HP 1250 1250 50 N m to SMA f HP 1250 1158 50 SMA f to SMA f HP 1250 1200 50 SMA m to BNC f HP 1250 1159 50 SMA m to SMA m 2 required HP 1250 1397 50 right angle SMA m to SMA m HP 1250 1236 50 SMB f to BNC f 2 required HP 1250 0672 50 SMB f to SMB f 2 required HP 1250 0674 ...

Page 120: ...However some RF section adjustments require that a microwave source substitute for the HP 70900B local oscillator source signal at the 1ST LO IN The microwave source provides a tune voltage of either 0 5 V GHz or 1 0 V GHz The Tune Span ET converts the microwave source tune voltage to one compatible with the RF section Tune Span requirements Connections to the Tune Span ET 1 Connect the 15 V SMB j...

Page 121: ...Specialized Test Equipment ET Tune Span ET Figure 5 2 Tune Span ET Schematic Figure 5 3 Tune Span ET Component Locations 5 4 Recommended Test Equipment Tables ...

Page 122: ...8W R2 0698 6322 Resistor 4K 0 1 1 8W R3 0698 3260 Resistor 464K 0 1 1 8W R4 0698 3260 Resistor 464K 0 1 1 8W R5 2100 3165 Resistor Var 2M 1 turn R6 0698 6322 Resistor 4K 0 1 1 8W R7 0698 6624 Resistor 2K 0 1 1 8W R8 0698 3451 Resistor 133K 1 1 8W R9 0698 6322 Resistor 4K 0 1 1 8W R10 0698 6624 Resistor 2K 0 1 1 8W R11 2100 3123 Resistor Var 500 ohms 17 turns R12 0757 0346 Resistor 10 ohms 1 1 8W C...

Page 123: ...et the test equipment main power switches to ON 3 Set the power supply output to 15 Vdc 4 Set the microwave source to 3 GHz CW 5 Adjust ET potentiometer R5 OFFSET for 4 5 6 3 mV as indicated by the DVM 6 Set the microwave source to 6 6 GHz CW 7 Adjust ET potentiometer R11 GAIN for 9 9 V 60 3 mV as indicated by the DVM 8 Repeat steps 3 4 5 and 6 until adjustment of R11 is not required 5 6 Recommend...

Page 124: ... wire assembly connector from J203 and insert the O set Coil Current ET 2 Plug the wire assembly connector into the ET and the banana connector into a digital multimeter Current through the SYTFMD o set coil sets up a magnetic eld that o sets the LO frequency for the 1L0 2L0 and 4L0 bands An o set coil current adjustment assures an o set exactly 321 4 MHz above the RF frequency The ET described he...

Page 125: ......

Page 126: ...d or adjusted All of the setups described in this chapter are automated These automated setups require a controller and are run with software that is described in Chapter 2 The information in this chapter is given in the following order External Frequency Reference 6 2 Test System Calibration Synthesized Source 6 6 Microwave Source 6 7 Spectrum Analyzer 6 8 Flatness 6 10 Return Loss 6 12 Noise Fig...

Page 127: ...nthesizer level generator lacks the spectral purity required for most applications as a frequency reference and should not be connected to other test equipment The HP 8902A measuring receiver does not have a standard rear panel 10 MHz OUTPUT 100 MHz Generation The local oscillator requires a 100 MHz external reference Most other instruments that need a reference require 10 MHz There are three equi...

Page 128: ...External Frequency Reference Figure 6 1 Preferred Frequency Reference Connections System Calibration 6 3 ...

Page 129: ...External Frequency Reference Figure 6 2 Using an HP 70310A Precision Frequency Reference and a House Standard Figure 6 3 Using an HP 70310A Precision Frequency Reference 6 4 System Calibration ...

Page 130: ...External Frequency Reference Figure 6 4 Using an HP 8566B Spectrum Analyzer and a House Standard System Calibration 6 5 ...

Page 131: ...can move from test to test Pressing NNNNNNNNNNNNNNNNNNNNNNNNNN Exit Cal allows loading of a previously selected test Synthesized Source Calibration Figure 6 5 Synthesized Source Calibration Test Setup Test Equipment Preferred Model Numbers Synthesized source HP 8663A synthesized signal generator Power sensor HP 8485A APC 3 5 mm m power sensor Power meter HP 436A power meter Cable HP 85680 60093 12...

Page 132: ...e steps in discrete CW frequencies from 10 MHz to 22 GHz At each frequency the amplitude of the full microwave source adjusts until the power meter reads either 010 or 0 5 dBm depending on the step frequency The routine stores the full microwave source amplitudes in controller common memory When an isolator replaces the 6 dB xed attenuator this procedure calibrates the microwave source when it is ...

Page 133: ...Test System Calibration HP 8566B Spectrum Analyzer Calibration Figure 6 7 Spectrum Analyzer Reference Calibration Test Setup Figure 6 8 Spectrum Analyzer IF Calibration Test Setup 6 8 System Calibration ...

Page 134: ... 88C U BNC m to BNC m Cable HP 5061 9038 520 mm SMA m to SMA m Adapter HP 1250 1200 50 SMA m to BNC f Adapter HP 1250 1158 50 SMA f to SMA f Adapter HP 1250 1250 50 N m to SMA f Adapter HP 5061 5311 50 APC 3 5 f to APC 3 5 f Adapter HP 1250 1744 50 APC 3 5 f to N m Note Reference to the HP 8566B spectrum analyzer implies use of the same RF cable used during calibration of the analyzer they are a m...

Page 135: ... error in step gain resolution bandwidth lter switching amplitude and log delity All measurements are normalized to a 10 kHz resolution bandwidth setting The user connects the level generator output to the calibrated spectrum analyzer RF input cable and adjusts the calibrated spectrum analyzer FREQ ZERO and AMPTD CAL Figure 6 8 shows the required calibration setup RF calibration measures the frequ...

Page 136: ... common memory The full microwave source increments in discrete steps from 10 MHz to 22 GHz At each step full microwave source amplitude adjusts until the power meter reading is 08 dBm This calibrates out the approximately 6 dB loss through the power splitter The procedure stores full microwave source amplitude in controller common memory The scalar network analyzer measures the absolute R channel...

Page 137: ...scalar network analyzer External reference Refer to External Frequency Reference Power splitter HP 11667B power splitter Directional bridge HP 85027B directional bridge Detector HP 11664E detector Calibrated open short HP 85027 60004 calibrated open short Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Adapter HP 1250 1748 50 APC 3 5 m to APC 3 5 m Adapter HP 5061 5311 50 APC 3 5 f to APC...

Page 138: ...then connects the calibrated open to the test port The routine saves the responses from the two setups The routine converts the short open data from logarithmic to linear averages the converted data and then converts it back to logarithmic data The averaged logarithmic data is stored in controller common memory Noise Figure Meter Calibration Figure 6 12 Noise Figure Meter Calibration Test Setup Te...

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Page 140: ...wer Out 7 10 Adjustment 05 LOLA Tuned Filter 7 12 Adjustment 06 SYTFMD O set Coil 7 14 Adjustment 07 SYTFMD Main Coil Preset 7 17 Adjustment 08 Multiplier Power Leveling 7 20 Adjustment 09 SYTFMD Main Coil Alignment 7 25 Adjustment 10 VCO Tune Line Voltage 7 28 Adjustment 11 VCO 2nd LO Frequency Amplitude 7 30 Adjustment 12 2nd Converter LO Feedthrough 7 32 Adjustment 13 Sampler IF Out DC 7 34 Adj...

Page 141: ...ar panel the LO module must meet its speci cations for the particular output CAUTION To avoid connector damage a blown mainframe line fuse or a blown module fuse the mainframe main power switch must be set to OFF before connecting or disconnecting the extender module cable 1 With the mainframe line switch OFF remove the HP 70908A RF section from the mainframe 2 Install the extender module in the m...

Page 142: ...al generator Microwave source HP 8340A synthesized sweeper External reference Refer to External Frequency Reference in Chapter 6 Adapter HP 1250 0780 50 N m to BNC f Cable HP 8120 5016 160 mm SMB f to SMB f Cable HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Cable HP 5061 9038 520 mm SMA m to SMA m For optional LO setup Isolator HP 0955 0204 microwave isolator Cable HP 8120 4921 91 cm 50 APC 3 5...

Page 143: ...nce which allows drain o of the probe cable capacitance To prevent adjustment errors do not connect the HP 70900A B local oscillator source output to the HP 70908A RF section Figure 7 2 Equipment Setup for Adjustment 01 LOLA Gate Bias Figure 7 3 Locations for Adjustment 01 LOLA Gate Bias 7 4 Adjustment Procedures ...

Page 144: ...just the three LO leveling ampli er LOLA gate bias voltages to values listed on the multiplier assembly 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 Connect the equipment as shown in Figure 7 2 5 Set the mainframe line switch to ON and allow at ...

Page 145: ...nce which allows drain o of the probe cable capacitance To prevent adjustment errors do not connect the HP 70900A B local oscillator source output to the HP 70908A RF section Figure 7 4 Equipment Setup for Adjustment 02 Multiplier Gate Bias Figure 7 5 Locations for Adjustment 02 Multiplier Gate Bias 7 6 Adjustment Procedures ...

Page 146: ...ure is to adjust the three multiplier gate bias voltages to the values listed on the multiplier assembly 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 Connect the equipment as shown in Figure 7 4 5 Set the mainframe line switch to ON and allow at...

Page 147: ...00 controller Mainframe HP 70001A mainframe Local oscillator HP 70900A B local oscillator source Precision DVM HP 3458A digital multimeter Cable 2 required HP 8120 5016 160 mm SMB f to SMB f Cable HP 10503A 122 cm 48 in 50 coax UG 88C U BNC m to BNC m Adapter HP 1251 2277 50 BNC f to dual banana plug Adapter HP 1250 1292 50 BNC f to alligator clips Extender module HP 70001 60013 extender module 7 ...

Page 148: ...he mainframe and connect the HP 70908A RF section to the extender cable 4 Connect the equipment as shown in Figure 7 6 5 Set the mainframe line switch to ON and allow at least 30 minutes initial warmup before starting the adjustment 6 Load and run Adjustment 03 Reference Voltage Refer to Chapter 2 for information about running the software The DVM connects to TP1 2 on the A10 power supply driver T...

Page 149: ...Adjustment 04 LOLA Power Out Figure 7 8 Equipment Setup for Adjustment 04 LOLA Power Out Figure 7 9 Locations for Adjustment 04 LOLA Power Out 7 10 Adjustment Procedures ...

Page 150: ...MA m to SMA m Extender module HP 70001 60013 extender module The purpose of this procedure is to adjust the LO leveling ampli er power output by measuring and adjusting a detector voltage proportional to the power out The proper voltage is listed on a label a xed on the A1 leveling ampli er 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the ex...

Page 151: ...Adjustment 05 LOLA Tuned Filter Figure 7 10 Equipment Setup for Adjustment 05 LOLA Tuned Filter Figure 7 11 Locations for Adjustment 05 LOLA Tuned Filter 7 12 Adjustment Procedures ...

Page 152: ...A m Extender module HP 70001 60013 extender module The purpose of this procedure is to adjust the LO leveling ampli er tuned lter The proper voltage is listed on a label a xed on the A1 leveling ampli er 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cabl...

Page 153: ...Adjustment 06 SYTFMD O set Coil Figure 7 12 Equipment Setup for Adjustment 06 SYTFMD O set Coil Figure 7 13 Locations for Adjustment 06 SYTFMD O set Coil 7 14 Adjustment Procedures ...

Page 154: ...corrects for o set slope and square law errors The compensated voltage drives current through the o set coil and this tunes the discriminator sphere 321 4MHz above the RF frequency in the 1L0 2L0 and 4L0 bands 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extende...

Page 155: ...a square law breakpoint voltage and A10R46 for maximum squared o set voltage at 22 GHz The microwave source steps incrementally from 3021 4 to 6521 4 MHz 3160 7 to 6560 7 MHz and 3230 35 to 5580 35 MHz in bands 1L0 2L0 and 4L0 respectively The DUT tunes at each step to center the RF INPUT signal The test calculates current errors by subtracting the actual o set coil currents from the calculated cu...

Page 156: ...FMD Main Coil Preset Adjustment 07 SYTFMD Main Coil Preset Figure 7 14 Equipment Setup for Adjustment 07 SYTFMD Main Coil Preset Figure 7 15 Locations for Adjustment 07 SYTFMD Main Coil Preset Adjustment Procedures 7 17 ...

Page 157: ...preliminary value It adjusts the sensitivity of the main coil driver and also the 321 4 MHz o set for each band The Tune Span ramp voltage drives the main coil driver which provides main coil current 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 ...

Page 158: ... pressing NNNNNNNNNNNNNNNNNNNNNNNNNN continue returns to the adjustment Note To ensure accurate repeatable measurements a hysteresis correction routine executes after any change in LO frequency The routine eliminates residual magnetic e ects DUT frequency band is 2L0 The microwave source frequency is 3160 7 MHz Hysteresis correction executes The user adjusts A10R8 for 0 V as indicated by the DVM A...

Page 159: ...Adjustment 08 Multiplier Power Leveling Figure 7 16 Equipment Setup for Adjustment 08 Multiplier Power Leveling 7 20 Adjustment Procedures ...

Page 160: ...ltiplier Power Leveling Figure 7 17 Locations for Adjustment 08 Multiplier Power Leveling Figure 7 18 Locations of MUT LEVEL LED and Connect Points for Adjustment 08 Multiplier Power Leveling Adjustment Procedures 7 21 ...

Page 161: ...able cbbncm2smbf123cm Adapter HP 1250 1158 50 SMA f to SMA f Adapter HP 1250 1159 50 SMA m to SMA m Adapter HP 5061 5311 50 APC 3 5 f to APC 3 5 f Adapter HP 1251 2277 50 BNC f to dual banana plug Adapter HP 1250 1292 50 BNC f to alligator clips Extender module HP 70001 60013 extender module The purpose of this procedure is to adjust the multiplier detector bias compensation to assure leveled mult...

Page 162: ...ed the program adds 1 1 dBm temperature degradation to each of the three power delta numbers The adjustments and tests in this procedure require that the microwave source sweep through the following LO ranges from low to high limits 1L0 3021 4 MHz to 6521 4 MHz 2L0 3160 7 MHz to 6560 7 MHz 4L0 3230 35 MHz to 5580 35 MHz The adjustment band sequence is 2L0 1L0 4L0 because 4L0 requires the most accu...

Page 163: ...f the impedance change at the multiplier output the user adjusts the 4L0 potentiometer until the voltmeter indicates a leveled condition The user then adjusts detector bias to decrease the power meter reading by delta P The program saves the precision DVM reading as an indication of the leveled frequency In 2L0 band both the DUT and the microwave source tune to the low band limit 3160 7 MHz The us...

Page 164: ...in Coil Alignment Adjustment 09 SYTFMD Main Coil Alignment Figure 7 19 Equipment Setup for Adjustment 09 SYTFMD Main Coil Alignment Figure 7 20 Locations for Adjustment 09 SYTFMD Main Coil Alignment Adjustment Procedures 7 25 ...

Page 165: ...r each band The LO Tune Span ramp voltage drives the main coil driver circuitry 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 Connect the equipment as shown in Figure 7 19 5 Set the mainframe line switch to ON and allow at least 30 minutes initia...

Page 166: ... Frequency band is 4L0 The microwave source steps 48 frequencies from 3230 35 MHz to 5580 35 MHz At each step the DVM measures the error voltage which stores in an array that provides data for nal o set calculations The array is sorted for maximum and minimum values and frequency At the 5580 35 MHz step hysteresis correction execute and the user then readjusts A10R31 for 0 V 60 2 V The data in the...

Page 167: ...Adjustment 10 VCO Tune Line Voltage Figure 7 21 Equipment Setup for Adjustment 10 VCO Tune Line Voltage Figure 7 22 Locations for Adjustment 10 VCO Tune Line Voltage 7 28 Adjustment Procedures ...

Page 168: ...de bias to a known level thus allowing other 2nd LO adjustments 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 Connect the equipment as shown in Figure 7 21 5 Set the mainframe line switch to ON and allow at least 30 minutes initial warmup before ...

Page 169: ...t 11 VCO 2nd LO Frequency Amplitude Figure 7 23 Equipment Setup for Adjustment 11 VCO 2nd LO Frequency Amplitude Figure 7 24 Locations for Adjustment 11 VCO 2nd LO Frequency Amplitude 7 30 Adjustment Procedures ...

Page 170: ... The VCO tune voltage is mid range 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 Connect the equipment as shown in Figure 7 23 5 Set the mainframe line switch to ON and allow at least 30 minutes initial warmup before starting the adjustment 6 Loa...

Page 171: ...nframe HP 70001A mainframe Local oscillator HP 70900A B local oscillator source Spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Cable HP 5061 5458 1 0 meter SMA m to SMA m Adapter HP 1250 0672 50 SMB f to SMB f Adapter HP 1250 0674 50 SMB m to SMA f Adapter HP 1250 1250 50 N m to SMA f Test cover HP 5022 1150 2nd converter test cov...

Page 172: ...ect the equipment as shown in Figure 7 25 5 Set the mainframe line switch to ON and allow at least 30 minutes initial warmup before starting the adjustment 6 Load and run Adjustment 12 2nd Converter LO Feedthrough Refer to Chapter 2 for information about running the software The calibrated spectrum analyzer connects to the 2nd converter A8J2 321 4 MHz IF OUT Refer to the A9 2nd converter PLL repla...

Page 173: ...Adjustment 13 Sampler IF Out DC Figure 7 27 Equipment Setup for Adjustment 13 Sampler IF Out DC Figure 7 28 Locations for Adjustment 13 Sampler IF Out DC 7 34 Adjustment Procedures ...

Page 174: ...des error correction It is proportional to the phase di erence between the 3 3 MHz 2nd LO input signal and the 11th harmonic of the 300 MHz reference Note Before performing this adjustment verify completion of the following Adjustment 11 VCO 2nd LO Frequency Amplitude 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the ma...

Page 175: ...Adjustment 14 Sampler IF Out AC Figure 7 29 Equipment Setup for Adjustment 14 Sampler IF Out AC Figure 7 30 Locations for Adjustment 14 Sampler IF Out AC 7 36 Adjustment Procedures ...

Page 176: ...e performing this adjustment verify completion of the following Adjustment 11 VCO 2nd LO Frequency Amplitude 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 Connect the equipment as shown in Figure 7 30 5 Set the mainframe line switch to ON and all...

Page 177: ...scillator Duty Cycle and Period Figure 7 31 Equipment Setup for Adjustment 15 Search Oscillator Duty Cycle and Period Figure 7 32 Locations for Adjustment 15 Search Oscillator Duty Cycle and Period 7 38 Adjustment Procedures ...

Page 178: ...300 MHz IN reference frequency varies to activate the oscillator and then a manual adjustment sets duty cycle Note Before performing this adjustment verify completion of the following Adjustment 11 VCO 2nd LO Frequency Amplitude 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF sec...

Page 179: ...h Oscillator Square Wave Min Max Figure 7 33 Equipment Setup for Adjustment 16 Search Oscillator Square Wave Min Max Figure 7 34 Locations for Adjustment 16 Search Oscillator Square Wave Min Max 7 40 Adjustment Procedures ...

Page 180: ...re wave The 300 MHz IN reference frequency varies to activate the oscillator Note Before performing this adjustment verify completion of the following Adjustment 15 Search Oscillator Duty Cycle and Period 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cab...

Page 181: ...7 Search Oscillator Tune Line Peak Figure 7 35 Equipment Setup for Adjustment 17 Search Oscillator Tune Line Peak Figure 7 36 Locations for Adjustment 17 Search Oscillator Tune Line Peak 7 42 Adjustment Procedures ...

Page 182: ...ule HP 70001 60013 extender module The purpose of this procedure is to adjust the search oscillator for a peak on the RF section VCO tune line Note Before performing this adjustment verify completion of the following Adjustment 15 Search Oscillator Duty Cycle and Period 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the ...

Page 183: ...Adjustment 18 Phase Lock Check Figure 7 37 Equipment Setup for Adjustment 18 Phase Lock Check Figure 7 38 Locations for Adjustment 18 Phase Lock Check 7 44 Adjustment Procedures ...

Page 184: ...dure is to check the 2nd converter phase lock Note Before performing this adjustment verify completion of the following all VCO related adjustments from Adjustment 10 VCO Tune Line Voltage to this check 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable...

Page 185: ...9 VCO Tune Range Preliminary Check Figure 7 39 Equipment Setup for Adjustment 19 VCO Tune Range Preliminary Check Figure 7 40 Locations for Adjustment 19 VCO Tune Range Preliminary Check 7 46 Adjustment Procedures ...

Page 186: ... the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 Connect the equipment as shown in Figure 7 39 5 Set the mainframe line switch to ON and allow at least 30 minutes initial warmup before starting the adjustment 6 Load and run Adjustment 19 VCO Tune Range P...

Page 187: ...Adjustment 20 Lock Range Measurement Figure 7 41 Equipment Setup for Adjustment 20 Lock Range Measurement Figure 7 42 Locations for Adjustment 20 Lock Range Measurement 7 48 Adjustment Procedures ...

Page 188: ...nt 16 Search Oscillator Square Wave Min Max Adjustment 17 Search Oscillator Tune Line Peak 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 Connect the equipment as shown in Figure 7 41 5 Set the mainframe line switch to ON and allow at least 30 min...

Page 189: ...Adjustment 21 Mixer Bias Figure 7 43 Equipment Setup for Adjustment 21 Mixer Bias Figure 7 44 Locations for Adjustment 21 Mixer Bias 7 50 Adjustment Procedures ...

Page 190: ...djustment procedure is to measure the RF section 2nd mixer bias Note Before performing this adjustment verify completion of the following Adjustment 20 Lock Range Measurement 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 Connect the equipment as ...

Page 191: ...Adjustment 22 2nd Converter Bandpass Filter Tune Figure 7 45 Equipment Setup for Adjustment 22 2nd Converter Bandpass Filter Tune 7 52 Adjustment Procedures ...

Page 192: ... mm m to APC 3 5 mm m Cable 4 required HP 10503A 122 cm 48 in 50 coax UG 88C U BNC m to BNC m Cable 2 required HP 8120 5016 160 mm SMB f to SMB f Cable HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 5061 5311 50 APC 3 5 f to APC 3 5 f Adapter HP 1250 1159 50 SMA m to SMA m Adapter 2 required HP 1250 1744 50 APC 3 5 f to N m Adapter HP 1250 0672 50 SMB f to SMB f Adapter HP 1250 0674 50...

Page 193: ... 2 for information about running the software The synthesized signal generator provides 300 MHz 0 dBm at the DUT INPUT The full microwave source through an isolator provides 3921 4 MHz 8 dBm at the DUT LO input The network analyzer channel A detector connects to the DUT 321 4 MHz OUT The user views the network analyzer response while adjusting the three 2nd converter bandpass lter tuning screws an...

Page 194: ... HP 8663A synthesized signal generator External reference Refer to External Frequency Reference in Chapter 6 Precision DVM HP 3458A digital multimeter Cable HP 10503A 122 cm 48 in 50 coax UG 88C U BNC m to BNC m Cable HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1251 2277 50 BNC f to dual banana plug Adapter HP 1250 1292 50 BNC f to alligator clips Adapter HP 1250 0780 50 N m to BNC ...

Page 195: ...low at least 30 minutes initial warmup before starting the adjustment 6 Load and run Adjustment 23 VCO Tune Range Final Refer to Chapter 2 for information about running the software The DVM connects to A9TP1 phase lock loop ampli er output The user adjusts the 2nd LO cavity screw located on 2nd converter bandpass lter and LO housing for an A9TP1 voltage between 07 97 V and 07 53 V An unlock condit...

Page 196: ...Adjustment 24 Last Converter Bandpass Filter Adjustment 24 Last Converter Bandpass Filter Figure 7 50 Equipment Setup for Adjustment 24 Last Converter Bandpass Filter Adjustment Procedures 7 57 ...

Page 197: ...rowave source HP 8340A synthesized sweeper Synthesized source HP 8663A synthesized signal generator Directional bridge HP 85027B directional bridge Cable HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Cable 4 required HP 10503A 122 cm 48 in 50 coax UG 88C U BNC m to BNC m Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Adapter HP 1250 0780 50 N m to BNC f Adapter HP 5061 5311 50 APC 3 5 ...

Page 198: ...t Converter Bandpass Filter Refer to Chapter 2 for information about running the software A pulse modulated carrier passes through the directional bridge to the A11 last converter 321 4 MHz HIGH IF INPUT The bridge and the A11 last converter output provide the inputs to channels B and A of the network analyzer The resulting analyzer display is the A11 bandpass lter response A prompt instructs the ...

Page 199: ...stment 25 Noise Figure Last Converter Figure 7 52 Equipment Setup for Adjustment 25 Noise Figure Last Converter Figure 7 53 Locations for Adjustment 25 Noise Figure Last Converter 7 60 Adjustment Procedures ...

Page 200: ...justment 24 Last Converter Bandpass Filter This adjustment procedure requires an initial calibration of the noise gure meter Refer to Figure 6 12 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 Connect the equipment as shown in Figure 7 52 5 Set th...

Page 201: ...ustment 26 Noise Figure 2nd Converter Figure 7 54 Equipment Setup for Adjustment 26 Noise Figure 2nd Converter Figure 7 55 Locations for Adjustment 26 Noise Figure 2nd Converter 7 62 Adjustment Procedures ...

Page 202: ...nd noise gure Noise gure indicate excess noise added by the 2nd converter This test is a troubleshooting tool Note This adjustment procedure requires an initial calibration of the noise gure meter Refer to Figure 6 12 1 Set the mainframe line switch to OFF 2 Remove the HP 70908A RF section from the mainframe 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the...

Page 203: ... External reference Refer to External Frequency Reference in Chapter 6 Power meter HP 436A power meter Power sensor HP 8485A APC 3 5 mm m power sensor Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 1744 50 APC 3 5 f to N m Adapter HP 1250 0674 50 SMB m to SMA f Adap...

Page 204: ...fore starting the adjustment 6 Load and run Adjustment 27 21 4 MHz IF Frequency Response Refer to Chapter 2 for information about running the software When performing this adjustment the measurement is made in the 1H0 and the 1L0 bands with the full microwave source providing RF INPUT amplitudes of 300 MHz and 2 7 GHz respectively The local oscillator source frequency increments in 200 kHz steps t...

Page 205: ......

Page 206: ...st 04 Front Panel LEDs 8 10 Test 05 10 7 MHz Rejection 8 11 Test 06 Feedthrough Out 21 4 MHz Port 8 13 Test 07 Harmonics Out 21 4 MHz Port 8 15 Test 08 Residual Emissions Out 21 4 MHz Port 8 17 Test 09 Image Rejection 8 19 Test 10 IF Rejection 8 21 Test 11 2nd Converter Startup 8 23 Test 12 IF Sub Harmonics 8 24 Test 13 Residual Responses 8 26 Test 14 Miscellaneous Residual Responses 8 28 Test 15 ...

Page 207: ... The LO multiplier output frequency routed to the 1st mixer is as follows 1L0 Band 3 0214 to 6 5214 GHz 2L0 Band 6 3214 to 13 1214 GHz 4L0 Band 12 9214 to 22 3214 GHz Note In the 1H0 band the LO signal 3 6214 to 6 5214 GHz is routed directly to the RF 1st converter bypassing the LO multiplier The 321 4 MHz switch in the last converter selects either the 321 4 MHz IF from the RF band path 1H0 band ...

Page 208: ... Cable HP 5021 5450 260 mm SMA m to SMA m Adapter HP 1250 0780 50 N m to BNC f For optional LO setup Isolator HP 0955 0204 microwave isolator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable HP 5061 9038 520 mm SMA m to SMA m Adapter HP 5061 5311 50 APC 3 5 f to APC 3 5 f The basic overall RF section setup in Figure 8 1 is applicable to all RF section veri cation tests except atness ...

Page 209: ...Test 01 Flatness Figure 8 2 Equipment Setup for Test 01 Flatness 8 4 Module Veri cation Tests ...

Page 210: ...me 3 Install the extender module in the mainframe and connect the HP 70908A RF section to the extender cable 4 Set the mainframe line switch to ON 5 Load and run Test 01 Flatness Refer to Chapter 2 for information about running the software When performing this veri cation test the DUT frequency band is 1H0 The network analyzer channel A detector connects to the DUT 21 4 MHz OUT The full microwave...

Page 211: ...l generator Level generator HP 3335A synthesizer level generator Spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Cable HP 10503A 122 cm 48 in 50 coax UG 88C U BNC m to BNC m Adapter 2 required HP 1250 0780 50 N m t...

Page 212: ...about running the software When performing this veri cation test the level generator steps 10 MHz to 200 Hz at the DUT RF INPUT At each frequency step the local oscillator source tunes to produce a response at the DUT 21 4 MHz OUT The calibrated spectrum analyzer measures the 21 4 MHz OUT amplitude The measured amplitude at each frequency is normalized to the amplitude at 10 MHz input by subtracti...

Page 213: ...ynthesizer level generator Spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 10503A 122 cm 48 in 50 coax UG 88C U BNC m to BNC m Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 1744 50 APC 3 5 f to N m Adapter 2 required HP 1250 0780 50 N ...

Page 214: ...1 4 MHz 050 dBm at the DUT RF INPUT The calibrated spectrum analyzer connects to the DUT 21 4 MHz OUT The local oscillator source tunes to center the RF INPUT signal The DUT input attenuation is 10 dB and the frequency band is 1H0 The calibrated spectrum analyzer measures the 21 4 MHz OUT as a reference and then the attenuator steps from 0 to 70 dB in 10 dB steps At each step the level generator p...

Page 215: ...e HP 8340A synthesized sweeper External reference Refer to External Frequency Reference in Chapter 6 Cable HP 8120 5014 100 mm SMB f to SMB f Cable HP 5061 9021 390 mm SMB f to SMB f Cable HP 5061 9038 520 mm SMA m to SMA m For optional LO setup Isolator HP 0955 0204 microwave isolator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable HP 5021 5450 260 mm SMA m to SMA m Adapter HP 5061...

Page 216: ...et the mainframe line switch to ON 3 Load and run Test 04 Front Panel LEDs Refer to Chapter 2 for information about running the software When performing this veri cation test the RF section can be con gured in the system or connected to an extender module Either the HP 70900B local oscillator source or a full microwave source can provide the LO input signal The test prompts the user to select a so...

Page 217: ...icrowave source HP 8340A synthesized sweeper Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter 2 required HP 1250 0780 50 N m to BNC f Adapt...

Page 218: ... the software When performing this veri cation test the DUT frequency band is 1H0 The full microwave source provides 300 MHz 010 dBm at the DUT RF INPUT The local oscillator source tunes to center the RF INPUT signal The calibrated spectrum analyzer measures the 21 4 MHz OUT signal amplitude The local oscillator source tunes to a 10 7 MHz o set which results in a 10 7 MHz signal at the 21 4 MHz OU...

Page 219: ...ator Full microwave source HP 8340A synthesized sweeper Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 1744 50 APC 3 5 f to N m A...

Page 220: ...to ON 3 Load and run Test 06 Feedthrough Out 21 4 MHz Port Refer to Chapter 2 for information about running the software When performing this veri cation test the full microwave source provides 300 MHz at the DUT RF INPUT DUT input attenuation is 10 dB and the frequency band is 1H0 The local oscillator source tunes to center the RF INPUT signal The calibrated spectrum analyzer compares test limits...

Page 221: ...thesized source HP 8663A synthesized signal generator Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 1744 50 APC 3 5 f to N m Ada...

Page 222: ...re When performing this veri cation test the full microwave source provides 300 MHz 0 dBm at the DUT RF INPUT The DUT frequency band is 1H0 The synthesized source provides 300 MHz 2 dBm at the DUT 300 MHz IN The local oscillator source tunes to center the RF INPUT signal The calibrated spectrum analyzer measures the amplitude of the fundamental and the rst three harmonics of the 21 4 MHz signal A ...

Page 223: ...nframe HP 70001A mainframe Local oscillator HP 70900A B local oscillator source Synthesized source HP 8663A synthesized signal generator Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter 2 required HP 1250 0780 50 N m to BNC f 8 18 Module Veri cation ...

Page 224: ... running the software When performing this veri cation test the synthesized source provides 300 MHz 0 dBm at the DUT 300 MHz IN The calibrated spectrum analyzer connects to the DUT 21 4 MHz OUT and measures the DUT 300 MHz last LO fundamental 300 MHz and its second and third harmonics 600 and 900 MHz The test then compares these 1 kHz bandwidth measurements with test limits The test next measures ...

Page 225: ...rowave source HP 8340A synthesized sweeper Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 1744 50 APC 3 5 f to N m Adapter HP 506...

Page 226: ...r information about running the software When performing this veri cation test the full microwave source connects to the DUT RF INPUT and then steps through the image frequencies At each step frequency the local oscillator source tunes to center the signal The calibrated spectrum analyzer measures the amplitude of the 21 4 MHz OUT signal The local oscillator source frequency is then o set by 0642 ...

Page 227: ...ve source HP 8340A synthesized sweeper Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 1744 50 APC 3 5 f to N m Adapter HP 5061 53...

Page 228: ...5 dBm at the RF INPUT The local oscillator source tunes to center the RF INPUT signal and the calibrated spectrum analyzer stores the 21 4 MHz OUT response amplitude as a reference The full microwave source tunes in sequence to the following frequencies 21 4 MHz last IF 278 6 MHz image of second IF 321 4 MHz second IF 2978 6 MHz image of rst IF 3621 4 MHz rst IF Measurements at the above frequenci...

Page 229: ...acement and or the adjustment of the A9 2nd converter PLL A5 VCO sampler A7 2nd mixer or A8 321 4 MHz matching network 1 Connect the equipment as shown in the test setup illustration for this procedure 2 Set the mainframe line switch to ON 3 Load and run Test 11 2nd Converter Startup Refer to Chapter 2 for information about running the software When performing this veri cation test in DUT band 1H0...

Page 230: ...ynthesized source HP 8663A synthesized signal generator Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 1744 50 APC 3 5 f to N m A...

Page 231: ...ides the DUT with a 300 MHz 02 dBm 300 MHz IN reference signal which ensures worst case sub harmonic response in the DUT The calibrated spectrum analyzer connects to the 21 4 MHz OUT The following procedure repeats twice in each band once for each subharmonic of interest The local oscillator source tunes to center the RF INPUT The calibrated spectrum analyzer stores the amplitude of the 21 4 MHz O...

Page 232: ...r Synthesized source HP 8663A synthesized signal generator Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 1744 50 APC 3 5 f to N ...

Page 233: ...n corrected for DUT atness The test then calculates DUT gain corrected 21 4 MHz amplitude minus 10 dBm RF INPUT Characterizing the DUT Input Attenuator With the DUT input attenuator set to 10 dB attenuation the calibrated spectrum analyzer measures the 21 4 MHz OUT amplitude The measurement repeats with 0 dB input attenuation The DUT attenuator correction factor equals the second measurement minus...

Page 234: ...synthesized signal generator Full microwave source HP 8340A synthesized sweeper Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 17...

Page 235: ...dBm RF INPUT Characterizing the DUT Input Attenuator With the DUT input attenuator set to 10 dB attenuation the calibrated spectrum analyzer measures the 21 4 MHz OUT amplitude The measurement repeats with 0 dB input attenuation The DUT attenuator correction factor equals the second measurement minus the rst Only the 0 and 10 dB DUT input attenuator settings are of interest Characterizing the Cali...

Page 236: ...P 8340A synthesized sweeper Synthesized source HP 8663A synthesized signal generator Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 12...

Page 237: ...rce provides 300 MHz 010 dBm at the DUT RF INPUT The DUT input attenuation is 0 dB and the frequency band is 1H0 The 321 4 MHz switch on A11 last converter routes the 321 4 MHz to the rear panel 321 4 MHz OUT The calibrated spectrum analyzer stores the amplitude of the 321 4 MHz signal as a reference The local oscillator source increments in 20 kHz steps thus causing the signal at the 321 4 MHz OU...

Page 238: ... source HP 8340A synthesized sweeper External reference Refer to External Frequency Reference in Chapter 6 Attenuator HP 8493C Option 006 coaxial xed attenuator Power meter HP 436A power meter Power sensor HP 8485A APC 3 5 mm m power sensor Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 1744 50 APC 3 5 f to N m Adapter...

Page 239: ...about running the software When performing this veri cation test the measurement is made in the 1H0 and the 1L0 bands with the full microwave source providing RF INPUT amplitudes of 300 MHz and 6 GHz respectively The local oscillator source frequency increments in 200 kHz steps thus producing 15 4 MHz to 27 6 MHz signals at the 21 4 MHz OUT A power meter measures each step The test determines 3 dB...

Page 240: ...rator Attenuator HP 8493C Option 006 coaxial xed attenuator External reference Refer to External Frequency Reference in Chapter 6 Power meter HP 436A power meter Power sensor HP 8485A APC 3 5 mm m power sensor Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 1744 50 APC 3 5 f to N m Adapter HP 5061 5311 50 APC 3 5 f to A...

Page 241: ...st setup illustration for this procedure 2 Set the mainframe line switch to ON 3 Load and run Test 17 Step Gain Refer to Chapter 2 for information about running the software When performing this veri cation test the full microwave source provides 300 MHz 10 dBm at the DUT RF INPUT The power meter connects to the DUT 21 4 MHz OUT port The test measures 21 4 MHz OUT power with the step gain turned o...

Page 242: ...hesized sweeper External reference Refer to External Frequency Reference in Chapter 6 Power meter HP 436A power meter Power sensor HP 8485A APC 3 5 mm m power sensor Attenuator HP 8493C Option 006 coaxial xed attenuator Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Adapter HP 1250 1744 50 APC 3 5 f to N m Adapter HP 5061 5311 50 APC ...

Page 243: ... this veri cation test the full microwave source provides 300 MHz 010 dBm at the DUT RF INPUT The DUT input attenuation is 10 dB and the frequency band is 1H0 The local oscillator source tunes to center the signal The power meter measures the amplitude of the 21 4 MHz OUT signal The measurement repeats with 0 dBm at the DUT RF INPUT Module gain compression at 10 dBm refers to the gain with 10 dBm ...

Page 244: ...l oscillator source Synthesized source HP 8663A synthesized signal generator Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Power meter HP 436A power meter Power sensor HP 8485A APC 3 5 mm m power sensor Cable HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Cable HP 5021 5450 260 mm SMA m to SMA m Adapter HP 1250 1250 5...

Page 245: ...d Harmonics Refer to Chapter 2 for information about running the software When performing this veri cation test the calibrated spectrum analyzer connects to the DUT 1st LO OUT The DUT input attenuation is 70 dB and the frequency band is 1H0 The HP 70900B local oscillator source provides the LO input signal The LO source tunes in 40 MHz steps from 3 GHz to 6 6 GHz At each step the calibrated spectr...

Page 246: ...Test 20 Diagnostics Test 20 Diagnostics Figure 8 21 Equipment Setup for Test 20 Diagnostics 1 of 2 Module Veri cation Tests 8 41 ...

Page 247: ...r Calibrated spectrum analyzer HP 8566B spectrum analyzer External reference Refer to External Frequency Reference in Chapter 6 Isolator HP 0955 0204 microwave isolator Attenuator HP 8493C Option 006 coaxial xed attenuator Tune Span ET Refer to Specialized Test Equipment ET in Chapter 5 Power supply HP 87421A power supply Cable HP 8120 5016 160 mm SMB f to SMB f Cable 2 required HP 85680 60093 123...

Page 248: ...e providing 5 dBm at the 1st LO IN The test rst veri es that the detectors are not reporting errors the microwave source power then steps down until the detectors do report unleveled errors The test fails if the LO unleveled detector does not report before the multiplier unleveled detector reports 0043 Problem Ampl low The 0043 error occurs when DUT 21 4 MHz OUT power is too low This test prompts ...

Page 249: ... voltage is low or missing The Tune Span cable from the LO module is rst connected and then disconnected The detector must rst indicate that the Tune Span voltage is present and then missing 7003 2nd LO unlocked The 7003 error occurs when 300 MHz IN signal to the 2nd converter PLL is low or missing This causes 2nd LO loop unlock The synthesized source connects to 300 MHz IN and rst provides 300 MH...

Page 250: ...enerator Microwave source HP 8340A synthesized sweeper External reference Refer to External Frequency Reference in Chapter 6 Isolator HP 0955 0204 microwave isolator Tune Span ET Refer to Specialized Test Equipment ET in Chapter 5 Power supply HP 87421A power supply Cable HP 8120 4921 91 cm 50 APC 3 5 mm m to APC 3 5 mm m Cable HP 8120 5016 160 mm SMB f to SMB f Cable 2 required HP 85680 60093 123...

Page 251: ...e 2 Set the mainframe line switch to ON 3 Load and run Test 21 LO Input Amplitude Range Refer to Chapter 2 for information about running the software When performing this veri cation test the DUT frequency is band 2L0 The microwave source rst provides the DUT 1st LO IN with 3 GHz 8 dBm and then 3 GHz 0110 dBm The 1st LO unleveled detector must rst indicate leveled power and then unleveled power Af...

Page 252: ...pose of this veri cation test is to measure the 1st LO feedthrough emissions out of the RF INPUT 1 Connect the equipment as shown in the test setup illustration for this procedure 2 Set the mainframe line switch to ON 3 Load and run Test 22 RF Input Emissions Refer to Chapter 2 for information about running the software When performing this veri cation test the DUT input attenuation is 10 dB The c...

Page 253: ...Test 23 RF Input Return Loss Figure 8 25 Equipment Setup for Test 23 RF Input Return Loss 8 48 Module Veri cation Tests ...

Page 254: ...ri cation test is to measure the return loss of the DUT RF INPUT This test is dependent upon the repair replacement or adjustment of the input connector A4 input attenuator A3 SYTFMD or A15 RF 1st converter This is a nal test Note Open short calibration must be performed prior to this test 1 Connect the equipment as shown in the test setup illustration for this procedure 2 Set the mainframe line s...

Page 255: ...Test 24 LO Output Return Loss Figure 8 26 Equipment Setup for Test 24 LO Output Return Loss 8 50 Module Veri cation Tests ...

Page 256: ...C 3 5 f to APC 3 5 f Adapter HP 1250 0780 50 N m to BNC f The purpose of this veri cation test is to measure the return loss of the DUT 1st LO OUT This test is dependent upon the repair replacement and or the adjustment of the A1 leveling ampli er or W20 RF LO aux cable 1 Connect the equipment as shown in the test setup illustration for this procedure 2 Set the mainframe line switch to ON 3 Load a...

Page 257: ...Test 25 LO Input Return Loss Figure 8 27 Equipment Setup for Test 25 LO Input Return Loss 8 52 Module Veri cation Tests ...

Page 258: ...3 5 f to APC 3 5 f Adapter HP 1250 0780 50 N m to BNC f The purpose of this veri cation test is to measure 1st LO input port return loss of the DUT This test is dependent upon the repair replacement and or the adjustment of the A1 leveling ampli er or W21 RF LO input cable 1 Connect the equipment as shown in the test setup illustration for this procedure 2 Set the mainframe line switch to ON 3 Loa...

Page 259: ...Test 26 Reference Return Loss Figure 8 28 Equipment Setup for Test 26 Reference Return Loss 8 54 Module Veri cation Tests ...

Page 260: ...Connect the equipment as shown in the test setup illustration for this procedure 2 Set the mainframe line switch to ON 3 Load and run Test 26 Reference Return Loss Refer to Chapter 2 for information about running the software When performing this veri cation test the DUT frequency band is 1H0 and input attenuation is 70 dB The scalar network analyzer mode is A R ratio incident signal input is chan...

Page 261: ...Test 27 Wide IF Output Return Loss Figure 8 29 Equipment Setup for Test 27 Wide IF Output Return Loss 8 56 Module Veri cation Tests ...

Page 262: ...250 0780 50 N m to BNC f The purpose of this veri cation test is to measure 321 4 MHz IF output port return loss of the DUT This test is dependent upon the repair replacement and or the adjustment of the A11 last converter or W10 321 4 MHz cable 1 Connect the equipment as shown in the test setup illustration for this procedure 2 Set the mainframe line switch to ON 3 Load and run Test 27 Wide IF Ou...

Page 263: ...Test 28 Narrow IF Output Return Loss Figure 8 30 Equipment Setup for Test 28 Narrow IF Output Return Loss 8 58 Module Veri cation Tests ...

Page 264: ...1 5311 50 APC 3 5 f to APC 3 5 f Adapter HP 1250 0780 50 N m to BNC f The purpose of this veri cation test is to measure the DUT 21 4 MHz OUT return loss This test is dependent upon the repair replacement and or the adjustment of the A11 last converter 1 Connect the equipment as shown in the test setup illustration for this procedure 2 Set the mainframe line switch to ON 3 Load and run Test 28 Nar...

Page 265: ...ource HP 8663A synthesized signal generator External reference Refer to External Frequency Reference in Chapter 6 Excess noise source HP 346C broadband noise source Noise gure meter HP 8970B noise gure meter Cable 2 required HP 85680 60093 123 cm 48 4 in 50 BNC m to SMB f Cable HP 10503A 122 cm 48 in 50 coax UG 88C U BNC m to BNC m Adapter HP 1250 1744 50 APC 3 5 f to N m Adapter 2 required HP 125...

Page 266: ...2 for information about running the software When performing this veri cation test the local oscillator source connects to the DUT 1st LO IN The synthesized source provides 300 MHz 0 dBm at the 300 MHz IN The 21 4 MHz OUT of the DUT connects to the input of the noise gure meter The output of the noise source connects to the RF INPUT of the DUT DUT input attenuation is 0 dB The local oscillator sou...

Page 267: ......

Page 268: ...MD A4 Input Attenuator A5 VCO Sampler A6 Isolator A7 2nd Mixer A8 321 4 MHz Matching Network A9 2nd Converter PLL A10 Power Supply Driver A11 Last Converter A12 Controller A13 ALC Bias A14 Front Panel Board A15 RF 1st Converter A16 Low Pass Filter A17 Low Pass Filter This service guide is part of an Option OB3 package which consists of two manuals To obtain a list of all versions of all assemblies...

Page 269: ...fer to Preparing a Static Safe Work Station in Chapter 4 To Remove the Module Cover 1 Remove the four side screws 1 2 Remove the four top screws 2 3 Remove the module cover To Replace the Module Cover 1 Replace the module cover 2 Replace the four top screws 2 3 Replace the four side screws 1 Figure 9 1 Module Cover Removal Replacement 9 2 Replacing Major Assemblies ...

Page 270: ... that hold the front panel to the base of the module Use a 3 0 mm hex wrench HP part number 8710 1392 6 Pull the front panel 5 forward To Replace the Front Panel 1 Position the front panel against the module base 2 Line up the front panel RF INPUT connector 6 and W3 2 and loosely reconnect them Do not bend the cable when moving the module 3 Use a 3 0 mm hex wrench to replace the two hex screws 4 t...

Page 271: ...Front Panel Figure 9 2 Front Panel Removal Replacement 1 of 2 9 4 Replacing Major Assemblies ...

Page 272: ...Front Panel Figure 9 3 Front Panel Removal Replacement 2 of 2 Replacing Major Assemblies 9 5 ...

Page 273: ... W10 9 and remove the rear panel 10 To Replace the Rear Panel 1 Reinsert W11 8 and W10 9 in the rear panel 10 replacing the hex nuts and washers Torque the connectors to 6 inch pounds 2 Reconnect W22J1 7 to A12J1 3 Reconnect W22J2 6 to A10J101 4 Position the rear panel against the module being careful not to damage the rear panel ground spring 11 5 Reconnect W20 4 and W21 5 to the rear panel and t...

Page 274: ...Rear Panel Figure 9 4 Rear Panel Removal Replacement 1 or 2 Replacing Major Assemblies 9 7 ...

Page 275: ...Rear Panel Figure 9 5 Rear Panel Removal Replacement 2 or 2 9 8 Replacing Major Assemblies ...

Page 276: ...ightly and sliding it out of the module Do not damage the A7 2nd mixer To Replace the Bandpass Filter 1 Replace the bandpass lter 5 positioning it over the A7 2nd mixer on the casting while lining up the bandpass lter 1ST IF IN connection with the A6 isolator 4 Do not damage the A7 2nd mixer 2 With the bandpass lter at against the casting tighten the bandpass lter 1ST IF IN connection to the A6 is...

Page 277: ...Bandpass Filter Figure 9 6 Bandpass Filter Removal Replacement 1 or 2 9 10 Replacing Major Assemblies ...

Page 278: ...Bandpass Filter Figure 9 7 Bandpass Filter Removal Replacement 2 or 2 Replacing Major Assemblies 9 11 ...

Page 279: ... ampli er To Replace the A1 Leveling Ampli er 1 Position the A1 leveling ampli er 7 on the center casting and loosely reconnect the connector 11 between the A1 leveling ampli er and the A2 LO multiplier 2 Loosely replace the four screws 10 that hold the A1 leveling ampli er to the center casting these screws will be tightened in step 4 3 Finish tightening the connector 11 between A1 leveling ampli...

Page 280: ...A1 Leveling Ampli er Figure 9 8 A1 Leveling Ampli er Removal Replacement Replacing Major Assemblies 9 13 ...

Page 281: ...3 SYTFMD J7 7 and then from the A2 LO multiplier 4 10 Carefully nish disconnecting the connector 6 at the INPUT of the A2 LO multiplier 4 and slide the A2 LO multiplier forward to remove it To Replace the A2 LO Multiplier 1 Reconnect the elbow connector 2 to the A2 LO multiplier OUTPUT Do not tighten at this time 2 Slide the A2 LO multiplier back into the module and begin to reconnect the connecto...

Page 282: ...A2 LO Multiplier Figure 9 9 A2 LO Multiplier Removal Replacement Replacing Major Assemblies 9 15 ...

Page 283: ...e module nish disconnecting the elbow connector 1 from the OUTPUT connector of the A2 LO multiplier To Replace the A3 SYTFMD 1 Replace the A3 SYTFMD 7 Line up the elbow connector 1 with the OUTPUT connector on the A2 LO multiplier line up A3J9 with W15 6 2 Loosely reconnect the elbow connector 1 to the OUTPUT connector on A2 LO multiplier Do not tighten the elbow connector all of the way yet it wi...

Page 284: ...A3 SYTFMD Figure 9 10 A3 SYTFMD Removal Replacement Replacing Major Assemblies 9 17 ...

Page 285: ...ssemblies when lifting out this assembly 10 Remove the two screws 9 that hold the A4 input attenuator to the attenuator bracket To Replace the A4 Input Attenuator 1 Replace the two screws 9 that hold the A4 input attenuator to the attenuator bracket The edges of the attenuator bracket should line up with the edge of the attenuator 2 Replace the attenuator attenuator bracket assembly 8 into the mod...

Page 286: ...A4 Input Attenuator Figure 9 11 A4 Input Attenuator Removal Replacement 1 of 2 Replacing Major Assemblies 9 19 ...

Page 287: ...A4 Input Attenuator Figure 9 12 A4 Input Attenuator Removal Replacement 2 of 2 9 20 Replacing Major Assemblies ...

Page 288: ...er 1 Replace the A5 VCO sampler 11 into the casting and replace the two hex screws and washers 10 and the one slot head screw 9 Torque the screws to 3 inch pounds 2 On the other side of the module replace the hex nut and lockwasher on the A5 VCO sampler RF IN connector 3 3 Reconnect W4 2 to the A5 VCO sampler RF IN connector 3 4 Fold up the A10 power supply driver and replace the three screws 1 th...

Page 289: ...A5 VCO Sampler Figure 9 13 A5 VCO Sampler Removal Replacement 1 of 3 9 22 Replacing Major Assemblies ...

Page 290: ...A5 VCO Sampler Figure 9 14 A5 VCO Sampler Removal Replacement 2 of 3 Replacing Major Assemblies 9 23 ...

Page 291: ...A5 VCO Sampler Figure 9 15 A5 VCO Sampler Removal Replacement 3 of 3 9 24 Replacing Major Assemblies ...

Page 292: ... 4 Disconnect the A6 isolator 1 from the bandpass lter 2 Note the orientation of the A6 isolator 5 Disconnect the cable from the A16 low pass lter to the isolator IN 4 To Replace the A6 Isolator 1 Reconnect the A6 isolator 1 to the bandpass lter 2 Note the orientation of the A6 isolator 2 Reconnect the cable from A16 low pass lter to isolator IN 4 3 Replace the A10 power supply driver center stand...

Page 293: ... pin 4 needs replacement unscrew the old ground pin and carefully screw in a new ground pin Torque the screw to 1 5 inch pounds Do not cross thread the new ground pin To Replace the A7 2nd Mixer 1 Short the capacitor pin 5 to the module casting then carefully replace the A7 2nd mixer diode board 2 The notched long edge 6 of the A7 2nd mixer should be next to the casting and the component side shou...

Page 294: ...A7 2nd Mixer Figure 9 17 A7 2nd Mixer Removal Replacement Replacing Major Assemblies 9 27 ...

Page 295: ...rews 1 that hold the 2nd converter cover to the center casting 3 Remove the one screw 2 and carefully lift up the A8 321 4 MHz matching network 3 To Replace the A8 321 4 MHz Matching Network 1 Position the A8 321 4 MHz matching network 3 with the pin feedthrough hole over the capacitor pin and press into place 2 Replace the one screw 2 3 Check that the 2nd converter cover has RFI gasket strips 4 i...

Page 296: ...A8 321 4 MHz Matching Network Figure 9 18 A8 321 4 MHz Matching Network Removal Replacement Replacing Major Assemblies 9 29 ...

Page 297: ...ter PLL over the VCO cover 6 with the notch 7 in the VCO cover lined up with the notch in A9 2nd converter PLL 2 Line up the feedthrough pins with the holes in A9 2nd converter PLL and press A9 2nd converter PLL into place on the VCO cover 3 Check that the VCO cover has RFI gasket strips 8 in its bottom slots 4 Check that the D shaped RFI gasket 9 on A9J1 is at side up 5 Position the A9 2nd conver...

Page 298: ...A9 2nd Converter PLL Figure 9 19 A9 2nd Converter PLL Removal Replacement 1 of 2 Replacing Major Assemblies 9 31 ...

Page 299: ...A9 2nd Converter PLL Figure 9 20 A9 2nd Converter PLL Removal Replacement 2 of 2 9 32 Replacing Major Assemblies ...

Page 300: ... A10J201 W23 3 from A10J203 W11 4 from A10J2 W8 5 from A10J4 W18 6 from A10J301 W22J2 7 from A10J101 4 Remove the three screws 8 from the hinges 9 then remove A10 power supply driver To Replace the A10 Power Supply Driver 1 Position the A10 power supply driver on the hinges 9 2 Replace the three screws 8 Torque the screws to 9 inch pounds 3 Reconnect the following cables W22J2 7 to A10J101 W18 6 t...

Page 301: ...A10 Power Supply Driver Figure 9 21 A10 Power Supply Driver Removal Replacement 9 34 Replacing Major Assemblies ...

Page 302: ...0 MHz IN connector 11 and the 21 4 MHz OUT connector 12 8 Slightly lift the A11 last converter 13 and slide it out of the module To Replace the A11 Last Converter 1 Slide the A11 last converter 13 into the module 2 From the rear of the module replace the hex nuts and lockwashers on the 300 MHz IN connector 11 and the 21 4 MHz OUT connector 12 3 Replace the hex nuts and lockwashers on the three fee...

Page 303: ...A11 Last Converter Figure 9 22 A11 Last Converter Removal Replacement 1 of 2 9 36 Replacing Major Assemblies ...

Page 304: ...A11 Last Converter Figure 9 23 A11 Last Converter Removal Replacement 2 of 2 Replacing Major Assemblies 9 37 ...

Page 305: ... A11J3 W22J1 7 from A12J1 3 Remove the eleven screws 8 and carefully slide the A12 controller 9 out of the module Do not damage any of the feedthroughs on the A9 2nd converter PLL or A11 last converter To Replace the A12 Controller 1 Slide the A12 controller 9 into the module Do not damage any of the feedthroughs on the A9 2nd converter PLL or A11 last converter 2 Reconnect the following cables W2...

Page 306: ...nsistors to the heat sink 5 Remove the ve screws 6 that hold A13 ALC bias in place 6 Slide out the A13 ALC bias making sure not to lose the insulators 7 To Replace the A13 ALC Bias 1 Slide the A13 ALC bias 4 into the module the insulators 7 should be in place between the heatsink and the transistors 2 Replace the ve screws 6 that hold A13 ALC bias in place 3 Replace the two screws 5 that hold the ...

Page 307: ...procedure 2 Remove the front panel Refer to the Front Panel procedure 3 Remove the four screws 1 that hold the A14 front panel board 2 in place To Replace the A14 Front Panel Board 1 Replace the A14 front panel board 2 on the front panel 2 Replace the four screws 1 that hold the A14 front panel board 2 in place 3 Replace the front panel Refer to the Front Panel procedure 4 Replace the module cover...

Page 308: ...rter 7 13 Remove four screws 15 14 Remove the A15 RF 1st converter 7 15 Remove W19 6 from the A15 RF 1st converter To Replace the A15 RF 1st Converter 1 Connect W19 6 to the A15 RF 1st converter 7 2 Position the A15 RF 1st converter 7 in the module 3 Replace the four screws 15 4 Connect W25 11 and W24 12 to the A15 RF 1st converter 7 IF and RF connectors 5 Tighten all connectors on cables W25 11 a...

Page 309: ...A15 RF 1st Converter Figure 9 27 A15 RF 1st Converter Removal Replacement 9 42 Replacing Major Assemblies ...

Page 310: ...e cable W25 11 and disconnect W26 13 from the A16 low pass lter 12 11 Remove A16 low pass lter 12 To Replace the A16 Low Pass Filter 1 Connect the A16 low pass lter 12 to W26 13 2 Connect cable W25 11 between A16 low pass lter 12 and the A15 RF 1st converter 14 3 Slide the microcircuit assembly 10 back into the module lining up the elbow connector 8 and the A2 LO multiplier OUTPUT connection tight...

Page 311: ...A16 Low Pass Filter Figure 9 28 A16 Low Pass Filter Removal Replacement 9 44 Replacing Major Assemblies ...

Page 312: ...w pass lter 12 12 Remove the clamp screw 14 13 Remove the A17 low pass lter 12 To Replace the A17 Low Pass Filter 1 Position the A17 low pass lter 12 secure it with the clamp screw 14 2 Connect W15 13 to the A17 low pass lter 12 3 Connect cable W24 11 between A17 low pass lter 12 and the A15 RF 1st converter 7 4 Slide the microcircuit assembly 10 back into the module lining up the elbow connector ...

Page 313: ...A17 Low Pass Filter Figure 9 29 A17 Low Pass Filter Removal Replacement 9 46 Replacing Major Assemblies ...

Page 314: ...i cation Because this service guide is part of an Option OB3 package which consists of two manuals refer to Manual 2 of this option set for information on part listings and schematics Manual 2 Manual 2 is a separate volume that contains packets of component level repair information for each RF section board assembly that has eld replaceable parts Each packet includes the parts list component locat...

Page 315: ...e 70908 20026 W13 3rd converter cable 70908 60035 W15 1st RF lter cable 70908 20039 W16 LO multiplier wiring harness 70908 60038 W17 LOLA wiring harness 70908 60037 W18 bias microcircuit cable 70908 60036 W19 1st converter LO cable 70908 20041 W20 RF LO aux cable 70908 20045 W21 RF LO input cable 70908 20031 W22 RP connector w W22J1 W22J2 70300 60042 W23 4 baller to drive cable 5062 0786 W24 RF 1s...

Page 316: ...Major Cables Figure 10 1 Overall Parts Identi cation Drawing Major Cables 1 of 3 Figure 10 2 Overall Parts Identi cation Drawing Major Cables 2 of 3 Overall Parts Identi cation Drawings 10 3 ...

Page 317: ...Major Cables Figure 10 3 Overall Parts Identi cation Drawing Major Cables 3 of 3 10 4 Overall Parts Identi cation Drawings ...

Page 318: ...Front 3 86290 60005 Connector Type N 4 0900 0012 O ring 364 IN ID 5 5022 0051 Latch Module 6 0510 1244 Retainer push on 7 2190 0681 Washer LK 7 16 IN ID 8 2950 0214 Nut Hex 7 16 X 28 IN 9 3050 0891 Washer FL M3 0 MM ID 10 0515 1950 Screw SMM3 0 8 CWPNTX 11 0515 0680 Screw SMM3 0 6 PNTX Figure 10 4 Overall Parts Identi cation Drawing Front View Overall Parts Identi cation Drawings 10 5 ...

Page 319: ...6 PNTX 6 3050 1205 Washer Nylon 0 190 IN ID 7 2190 0124 Washer Lock 0 195 IN ID 8 2950 0078 Nut Hex 10 32 9 1250 1957 Adapter SMA f to SMA f w nut washer 10 1810 0118 Termination SMA m 50 ohms 11 0515 0366 Screw SMM2 5 6 PNTX 12 5001 5840 Spring Grounding 13 5001 5835 Connector Bar 14 1460 2095 Spring CPR 5 49 MM OD 15 0535 0042 Nut Plastic Lock M3 X 0 5 Figure 10 5 Overall Parts Identi cation Dra...

Page 320: ...HP Part Number Description 1 70908 00005 Cover Module 2 0515 1946 Screw SMM3 0 6 PCFLTX 3 0515 2332 Screw SMM3 0 6 PCPNTX 4 70908 20016 Casting Center 5 70908 20019 Post PC Support 6 70908 00024 Insulator Cover Figure 10 6 Overall Parts Identi cation Drawing Top View Overall Parts Identi cation Drawings 10 7 ...

Page 321: ... Bottom View Item HP Part Number Description 1 0515 2113 Screw SMM4 0 8 PCPNTX 2 0515 2143 Screw SMM3 0 6 PNTX 3 70908 20011 Base Mounting 4 0515 1498 Screw SMM4 0 8 PCSHHX Figure 10 7 Overall Parts Identi cation Drawing Bottom View 10 8 Overall Parts Identi cation Drawings ...

Page 322: ...tem HP Part Number Description 1 0515 1590 Screw SMM3 0 45 PCFLPD 2 70908 20012 Cover Last Converter 3 70908 20021 Cover 2nd Converter 4 0515 0680 Screw SMM3 0 6 PNTX 5 0515 2113 Screw Mach M4 X 0 70 8MMLG PHPD 6 70908 20013 Pivot C STG 7 70908 00004 Clamp Pivot Pin Overall Parts Identi cation Drawings 10 9 ...

Page 323: ...Side View Identi cation Figure 10 8 Overall Parts Identi cation Drawing Side View 10 10 Overall Parts Identi cation Drawings ...

Page 324: ...r Lock 0 195IN ID 2 2950 0078 Nut Hex 10 32 3 0515 1950 Screw SMM3 0 8 CWPNTX 4 0515 0680 Screw SMM3 0 6 PNTX 5 5086 1626 Cover VCO 6 8160 0494 Gasket RFI D strip hollow 7 70904 20026 Screw Osc Feed 8 0515 0677 Screw SMM2 0 6 PNTX 9 0515 0658 Screw SMM2 0 6 CWPNTX 10 5062 1925 Pin Cap Assy 11 5062 1924 Filter Connector Assy 12 8160 0495 Gasket RFI 2 54 X 1 57 MM Overall Parts Identi cation Drawing...

Page 325: ...Left Side Cover Removed Identi cation Figure 10 9 Overall Parts Identi cation Drawing Left Side View and Cover Removed 1 of 2 10 12 Overall Parts Identi cation Drawings ...

Page 326: ...Left Side Cover Removed Identi cation Figure 10 10 Overall Parts Identi cation Drawing Left Side View and Cover Removed 2 of 2 Overall Parts Identi cation Drawings 10 13 ...

Page 327: ...9 1250 1157 Connector RF SMA f 10 0515 0666 Screw SMM3 0 18 CWPNTX 11 0515 1046 Screw SMM2 0 8 SHHX 12 0535 0018 Nut Hex M2 X 0 4 13 70904 20019 Bandpass Filter 14 2950 0216 Nut Hex 1 4 36 15 5062 1926 Connector Probe Assembly 16 1250 1397 Adapter Right Angle SMA m to SMA m 17 0515 0680 Screw SMM3 0 6 PNTX 18 5021 7441 Insulator 6 hole 19 5021 7441 Insulator 12 hole 20 0515 2286 Screw Mach M2 5 X ...

Page 328: ...sulator 28 0515 1950 Screw SMM3 0 8 CWPNTX 29 0515 0680 Screw SMM3 0 6 PNTX 30 70908 20020 Heatsink Block 31 0340 0949 Insulator 32 0515 0680 Screw SMM3 0 6 PNTX Not shown A7 2nd Mixer is behind BPF 70904 20025 Pin Ground 2nd Mixer 0515 0666 Screw SMM3 0 18 CWPNTX 0515 0382 Clamp Filter Figure 10 11 Overall Parts Identi cation Listing Right Side View A10 Power Supply Driver Facing Down and Cover R...

Page 329: ......

Page 330: ... Reference Voltage 7 8 Adjustment 04 LOLA Power Out 7 10 Adjustment 05 LOLA Tuned Filter 7 12 Adjustment 06 SYTFMD O set Coil 7 14 Adjustment 07 SYTFMD Main Coil Preset 7 17 Adjustment 08 Multiplier Power Leveling 7 20 Adjustment 09 SYTFMD Main Coil Alignment 7 25 Adjustment 10 VCO Tune Line Voltage 7 28 Adjustment 11 VCO 2nd LO Frequency Amplitude 7 30 Adjustment 12 2nd Converter LO Feedthrough 7...

Page 331: ...ontroller 2 24 Calibration data le not found for with serial number 2 25 Calibration data for is blank for some frequencies listed 2 25 Calibration data for is greater than maximum range of 2 25 Calibration data for is less than minimum range of 2 25 Calibration data frequency exceed acceptable limits 2 24 Calibration data frequency is greater than maximum range of 2 25 Calibration data frequency ...

Page 332: ...ected 2 29 Wrong device at speci ed address DUT was expected at address 2 27 error messages or warnings de ned 2 7 ESD electrostatic discharge 4 2 4 3 ET O set Coil Current 5 7 Tune Span 5 4 F failures 21 4 MHz detector 4 21 2nd converter 4 11 2nd LO unlocked 4 22 300 MHz present 4 21 Adjustment 01 LOLA Gate Bias 4 9 Adjustment 02 Multiplier Gate Bias 4 9 Adjustment 03 Reference Voltage 4 9 Adjust...

Page 333: ...oise Figure 4 24 Tune Span present 4 21 nal test Test 01 Flatness 8 5 Test 03 Attenuator Accuracy 8 9 Test 04 Front Panel LEDs 8 11 Test 06 Feedthrough Out 21 4 MHz Port 8 15 Test 08 Residual Emissions Out 21 4 MHz Port 8 19 Test 09 Image Rejection 8 21 Test 10 IF Rejection 8 23 Test 12 IF Sub Harmonics 8 26 Test 13 Residual Responses 8 28 Test 14 Miscellaneous Residual Responses 8 30 Test 16 21 4...

Page 334: ...t menu 2 22 software installing 2 5 version 2 5 specialized test equipment 5 4 5 7 SRM using an 2 2 static safe work station 4 2 static shielding containers 4 3 status messages 2 23 system performance tests 1 2 system veri cation of operation tests 1 2 T Test 01 Flatness 8 4 Test 02 Low Frequency Flatness 10 MHz 8 6 Test 03 Attenuator Accuracy 8 8 Test 04 Front Panel LEDs 8 10 Test 05 10 7 MHz Rej...

Page 335: ... 2 troubleshooting A10 power supply driver 4 38 A11 last converter 4 46 A12 controller 4 47 A13 ALC bias 4 48 A15 RF 1st converter 4 49 A1 leveling ampli er 4 25 A2 LO multiplier 4 28 A3 SYTFMD 4 30 A4 input attenuator 4 34 A5 A7 A8 A9 4 35 troubleshooting tool program 4 50 V veri cation of system operation tests 1 2 veri cation test failures 4 16 version software 2 5 Index 6 ...

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