IFR COM-120B User manual

MAINTENANCE

MANUAL

coM r 1208

COMMUNICATION SERUICE MONITOR

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MAINTENANCE

MANUAL

COM

-1208

COMMUNICATION

SERVICE

MONITOR

10200 West York Street / Wichita, Kansas 67215 U.S.A. / (316) 522-4981 / FAX (316) 524-2623

1002-0600-300

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PUBLISHED BY

IFR SYSTEMS INC

WICHITA, KANSAS

publication may be reproduced, stored in a retrieval system, or transmitted in any form

or by any means, electronic, mechanical, photocopying, recording or otherwise without

the prior permission of the publisher.

PUBLISHED BY

IFR

SYSTEMS INC

WICHITA, KANSAS

1996

IFR

SYSTEMS,

INC.

All

rights

reserved.

Printed

the

United

States

America.

part

this

publication

may

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stored

in a

retrieval

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transmitted

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TABLE OF CONTENTS

SECTION .1 - CALIBRATION

1-1 GENERAL

1-1-1 SAFETY PRECAUTIONS

1-1-2 ESD PRECAUTIONS

1-2 TEST EQUIPMENT REQUIREMENTS

1-3 DISASSEMBLYREQUIREMENTS

1.4 CALIBRATION ADJUSTMENTS

1-5 CONTROLS, CONNECTORS AND INDICATORS

1-6 COMPLETION OF CALIBRATION TEST PROCEDURES

1-7 CALIBRATION RECORD

1.8 CALIBRATIONPROCEDURES

1-8-1 POWER SUPPLY CALIBRAT]ON

1-8-2 TCXO/OCXOCALIBRATION

1-8-3 DVM CALIBRATION

1-8-4 GENERATOR OUTPUT LEVEL CALIBRATION

1-8.5 DISTORTIONMETERCALIBRATION

1-8-6 SINAD METER CALIBRATION

1.8-7 RF GENERATE FM DEVIAT]ON CALIBRATION

1.8.8 RF GENERATE PM DEVIATION CALIBRATION

1-8-9 RF GENERATE AM MODULATION CALIBRATION

1-8-10 RF GENERATE EXTERNAL MODULATION CALIBRATION

1-8-11 SPECTRUM ANALYZER CALIBRATION

1-8-12 MIXER NULL CALIBRATION

1-8-13 FM DEVIATION METER CALIBRAT]ON

1-8-14 PM DEVIATION METER CALIBRATION

1.8.15 AM MODULATION METER CALIBRATION

1.8.16 POWER METER CALIBRATION

SECTION 2 - PC BOARDS AND SCHEMATICS

PRODUCT STRUCTURE 1ST LO ASSEMBLY

INTERCONNECT DIAGRAM 2ND LO ASSEMBLY

COMPOSITE ASSEMBLY 3RD LO ASSEMBLY

CASE ASSEMBLY BASE BAND ASSEMBLY

LID ASSEMBLY GENERATOR TRAY

FRONT PANEL ASSEMBLY AM FM MODULATOR ASSEMBLY

KEYBOARD CONTROLLER ASSEMBLY GEN CONVERTER ASSEMBLY

AUDIO BOARD ASSEMBLY ANALYZER ASSEMBLY

EL D]SPLAY INTERFACE ASSEMBLY POWER SUPPLY ASSEMBLY

ATTENUATOR CONTROL ASSEMBLY REFERENCE FREQ. STD.

POWER TERMINATION ASSEMBLY RECEIVER TRAY STD.

GENERATOR OUTPUT ASSEMBLY FRONT END BLOCK

MOTHERBOARD ASSEMBLY IF AMP/DEMOD ASSEMBLY

PCMCIA INTERFACE ASSEMBLY RECEIVER TRAY OPT. 03

VIDEO CNTR/FCTN GEN ASSEMBLY DIGITAL TRAY OPT. 04

CONTROLLER TRAY AUXILIARY AMP OPT. 05

SYNTHESIZER TRAY RECEIVER TRAY OPT. 08

TABLE

CONTENTS

SECTION

1 -

CALIBRATION

1-1

GENERAL

1-1-1

SAFETY

PRECAUTIONS

1-1-2

ESD

PRECAUTIONS

1-2

TEST

EQUIPMENT

REQUIREMENTS

1-3

DISASSEMBLY

REQUIREMENTS

1-4

CALIBRATION

ADJUSTMENTS

1-5

CONTROLS,

CONNECTORS

AND

INDICATORS

1-6

COMPLETION

CALIBRATION

TEST

PROCEDURES

1-7

CALIBRATION

RECORD

1-8

CALIBRATION

PROCEDURES

-8-1

1-8-2

1-8-3

1-8-4

1-8-5

1-8-6

1-8-7

1-8-8

1-8-9

1-8-10

-8-11

-8-12

1-8-13

-8-14

-8-15

1-8-16

POWER

SUPPLY

CALIBRATION

TCXOIOCXO

CALIBRATION

DVM

CALIBRATION

GENERATOR

OUTPUT

LEVEL

CALIBRATION

DISTORTION

METER

CALIBRATION

SINAD

METER

CALIBRATION

GENERATE

DEVIATION

CALIBRATION

GENERATE

DEVIATION

CALIBRATION

GENERATE

MODULATION

CALIBRATION

GENERATE

EXTERNAL

MODULATION

CALIBRATION

SPECTRUM

ANALYZER

CALIBRATION

MIXER

NULL

CALIBRATION

DEVIATION

METER

CALIBRATION

DEVIATION

METER

CALIBRATION

MODULATION

METER

CALIBRATION

POWER

METER

CALIBRATION

SECTION

2 -

BOARDS

AND

SCHEMATICS

PRODUCT

STRUCTURE

INTERCONNECT

DIAGRAM

COMPOSITE

ASSEMBLY

CASE

ASSEMBLY

LID

ASSEMBLY

FRONT

PANEL

ASSEMBLY

KEYBOARD

CONTROLLER

ASSEMBLY

AUDIO

BOARD

ASSEMBLY

DISPLAY

INTERFACE

ASSEMBLY

ATTENUATOR

CONTROL

ASSEMBLY

POWER

TERMINATION

ASSEMBLY

GENERATOR

OUTPUT

ASSEMBLY

MOTHERBOARD

ASSEMBLY

PCMCIA

INTERFACE

ASSEMBLY

VIDEO

CNTR/FCTN

GEN

ASSEMBLY

CONTROLLER

TRAY

SYNTHESIZER

TRAY

ASSEMBLY

2ND

ASSEMBLY

3RD

ASSEMBLY

BASE

BAND

ASSEMBLY

GENERATOR

TRAY

MODULATOR

ASSEMBLY

GEN

CONVERTER

ASSEMBLY

ANALYZER

ASSEMBLY

POWER

SUPPLY

ASSEMBLY

REFERENCE

FREQ.

STD.

RECEIVER

TRAY

STD.

FRONT

END

BLOCK

AMPIDEMOD

ASSEMBLY

RECEIVER

TRAY

OPT.

DIGITAL

TRAY

OPT.

AUXILIARY

AMP

OPT.

RECEIVER

TRAY

OPT.

SECTION 1 . CALIBRATION

1 .1 G EN ERAL

This section contains calibration procedures for the following assemblies and systems:

PARA TITLE PAGE

1-8-1

1-8-2

1-8-3

1-B-4

1-8-5

1-8-6

1-8-7

1-8-8

1-8-9

1-8-10

1-8-1 1

1-8-12

1-8-13

1-8-14

1-8-15

1-8-16

These

POWER SUPPLY CALIBRATlON

TCXO/OCXO CALIBRATION

DVM CALIBRATION

GENERATOR OUTPUT LEVEL CALIBRATION

DISTORTION METER CALlBRATION

SINAD METER CALIBRATION

RF GENERATE FM DEVIATION CALIBRAT]ON

RF GENERATE PM DEVIATION CALIBRAT]ON

RF GENERATE AM MODULATION CALIBRATION

RF GENERATE EXTERNAL MODULATION CALIBRATION

SPECTRUM ANALYZER CALIBRATION

MIXER NULL CALIBRATION

FM DEVIATION METER CALIBRATION

PM DEVIATION METER CALIBRATION

AM MODULATION METER CALIBRATION

POWER METER CALIBRATION

1-5

1-7

1-9

1-1 1

1-14

1-16

1-18

1-21

1-23

1-25

1-29

1-36

1-38

1-41

1-43

1-45

procedures should be performed as a result of one or more of the following conditions:

O lf, during the course of normal operation, the COM-1208 or any major function thereof

fails to meet the performance specifications.

O lf a module is found to be defective and requires replacement.

O lf the recommended 12 month calibration interval is due.

Figure 1-1 lists the calibration procedures required based on the replacement of a specific

module. All procedures must be performed for the annual calibration.

1-1-1 SAFETY PRECAUTIONS

As with any piece of electronic equipment, extreme caution should be taken when working with

'live" circuits. When performing the calibration procedures in this section, be sure to observe

the f ollowing precautions:

WARNING: REMOVE ALL JEWELRY BEFORE PERFORMING ANY CALIBRATION

PROCEDURES INVOLVING LIVE CIRCUITS.

HEED ALL WARNINGS AND CAUTIONS CONCERNING MAXIMUM VOLTAGES

AND POWER INPUTS.

1-1

SECTION

1 -

CALIBRATION

1-1

GENERAL

This

section

contains

calibration

procedures

for

the

following

assemblies

and

systems:

PARA

1-8-1

1-8-2

1-8-3

1-8-4

1-8-5

1-8-6

1-8-7

1-8-8

1-8-9

1-8-10

-8-11

1-8-12

1-8-13

1-8-14

1-8-15

1-8-16

TITLE

POWER

SUPPLY

CALIBRATION

TCXOIOCXO

CALIBRATION

DVM

CALIBRATION

GENERATOR

OUTPUT

LEVEL

CALIBRATION

DISTORTION

METER

CALIBRATION

SINAD

METER

CALIBRATION

GENERATE

DEVIATION

CALIBRATION

GENERATE

DEVIATION

CALIBRATION

GENERATE

MODULATION

CALIBRATION

GENERATE

EXTERNAL

MODULATION

CALIBRATION

SPECTRUM

ANALYZER

CALIBRATION

MIXER

NULL

CALIBRATION

DEVIATION

METER

CALIBRATION

DEVIATION

METER

CALIBRATION

MODULATION

METER

CALIBRATION

POWER

METER

CALIBRATION

PAGE

1-5

1-7

1-9

1-11

1-14

1-16

1-18

1-21

1-23

1-25

1-29

1-36

1-38

1-41

1-43

1-45

These

procedures

should

performed

result

one

the

following

conditions:

•

If,

during

the

course

normal

operation,

the

COM-120B

any

major

function

thereof

fails

meet

the

performance

specifications.

•

module

found

defective

and

requires

replacement.

•

the

recommended

month

calibration

interval

due.

Figure

1-1

lists

the

calibration

procedures

required

based

the

replacement

specific

module.

All

procedures

must

performed

for

the

annual

calibration.

1-1 -1

SAFETY

PRECAUTIONS

with

any

piece

electronic

equipment,

extreme

caution

should

taken

when

working

with

"live"

circuits.

When

performing

the

calibration

procedures

this

section,

sure

observe

the

following

precautions:

WARNING:

REMOVE

ALL

JEWELRY

BEFORE

PERFORMING

ANY

CALIBRATION

PROCEDURES

INVOLVING

LIVE

CIRCUITS.

HEED

ALL

WARNINGS

AND

CAUTIONS

CONCERNING

MAXIMUM

VOLTAGES

AND

POWER

INPUTS.

-1

1-1-2 ESD PRECAUTIONS

CAUTION: THESE CALIBRATION PROCEDURES SHOULD ONLY BE PERFORMED lN AN ESD

ENVIRONMENT AND ALL PERSONNEL PERFORMING THIE PROCEDURES

SHOULD KNOW ACCEPTED ESD PRACTICES OR BE ESD CERTIFIED.

fi cAU'oN t?

L.--r \t/

THIS EQUIPMENT CONTAINS PARTS

SENSIT]VE TO DAMAGE

BY ELECTROSTATTC DTSCHARGE (ESD)

1.2 TEST EOUIPMENT REQUIREMENTS

Table 1-1 contains a comprehensive list of test equipment suitable for performing any of the

procedures listed in this manual. Any other equipment meeting the specifications listed in

Table 1-1 may be substituted in place of the recommended models.

NOTE: For certain procedures contained in this manual, the equipment listed in Appendix A may

exceed the minimum required specif ications.

1.3 DISASSEMBLY REQUIREMENTS

To perform the calibration procedures, the case assembly must be removed.

1.4 CALIBRATION ADJUSTMENTS

Before making adjustments, always observe the measurement. lf the measurement is within the

tolerances given, do not proceed with the adjustment. When an adjustment is required, attempt

to obtain a precise measurement, instead of just within tolerance.

1.5 CONTROLS, CONNECTORS AND INDICATORS

The front and rear panel controls, connectors and indicators specified in the calibration

procedures are followed by an item number. Refer to Figures 3-1 and 3-2 in the COM-1208

Operation Manual for the location of these items.

1.6 COMPLETION OF CALIBRATION TEST PROCEDURES

Upon completion of a specific calibration procedure, the calibration procedure may be

terminated. Control settings, operating commands and test equipment do not carry over from

one procedure to another and are not assumed at the beginning of a procedure.

1.7 CALIBRATION RECORD

A Calibration Record is provided for recording the results obtained while performing the

Calibration Procedures. lt is recommended the technician reoroduce the Calibration Record.

rather than use the copy in this manual.

1-2

1-1-2

ESD

PRECAUTIONS

CAUTION:

THESE

CALIBRATION

PROCEDURES

SHOULD

ONLY

PERFORMED

IN AN

ESD

ENVIRONMENT

AND

ALL

PERSONNEL

PERFORMING

THIE

PROCEDURES

SHOULD

KNOW

ACCEPTED

ESD

PRACTICES

OR BE

ESD

CERTIFIED.

\.~

CAUTION

THIS EQUIPMENT CONTAINS PARTS

SENSITIVE

DAMAGE

ELECTROSTATIC DISCHARGE (ESD)

1-2

TEST

EQUIPMENT

REQUIREMENTS

Table

1-1

contains

comprehensive

list

test

equipment

suitable

for

performing

any

the

procedures

listed

this

manual.

Any

other

equipment

meeting

the

specifications

listed

Table

1-1

may

substituted

place

the

recommended

models.

NOTE:

For

certain

procedures

contained

this

manual,

the

equipment

listed

Appendix

may

exceed

the

minimum

required

specifications.

1-3

DISASSEMBLY

REQUIREMENTS

perform

the

calibration

procedures,

the

case

assembly

must

removed.

1-4

CALIBRATION

ADJUSTMENTS

Before

making

adjustments,

always

observe

the

measurement.

the

measurement

within

the

tolerances

given,

not

proceed

with

the

adjustment.

When

adjustment

required,

attempt

obtain

precise

measurement,

instead

just

within

tolerance.

1-5

CONTROLS,

CONNECTORS

AND

INDICATORS

The

front

and

rear

panel

controls,

connectors

and

indicators

specified

the

calibration

procedures

are

followed

item

number.

Refer

Figures

3-1

and

3-2

the

COM-120B

Operation

Manual

for

the

location

these

items.

1-6

COMPLETION

CALIBRATION

TEST

PROCEDURES

Upon

completion

specific

calibration

procedure,

the

calibration

procedure

may

terminated.

Control

settings,

operating

commands

and

test

equipment

not

carryover

from

one

procedure

another

and

are

not

assumed

the

beginning

procedure.

1-7

CALIBRATION

RECORD

Calibration

Record

provided

for

recording

the

results

obtained

while

performing

the

Calibration

Procedures.

It is

recommended

the

technician

reproduce

the

Calibration

Record,

rather

than

use

the

copy

this

manual.

1-2

Type Model Specif icatlons

Digital Multimeter (DMM) HP34401A or equivalent

Calibrator Fluke 5100B or equivalent

Audio Analyzer HP8903B or equivalent Frequency Range:

20 Hz to 20 kHz

Accu racy

r0.1 dB

Frequency Counter Phillips PM6669

or equivalent Frequency:

'lO Hz to 1.3 GHz

Reso lution :

>7 digits

Measuring Receiver

HP8902A (opt. 30, 32,371

or equivalent RF Power:

-20 to +30 dBm

RF Power Range:

.1 to 1 GHz

RF Level:

Tuned 0 to -127 dBm

RF Power Accuracy:

10.1 dB

Measuring Receiver Sensor HP11722A or equivalent

Modulation Analyzer

HP8901A or equivalent FM Meter Range:

20 Hz to 200 kHz

FM Meter Accuracy:

t1% t1 digit

Phase Meter Range:

to 200 Radians

Phase Meter Accuracy:

t3"/" t1 digit

10 MHz Standard Accu racv:

t2 X 10-e

(Traceable to NIST)

COM-120 Maintenance Kit P/N 7001-8743-800

Signal Generator HP8657A or equivalent

10 W RF Amplif ier Amplifier Research

10w1000

or equivalent

Gain:

40 dB Nominal

Bandwidth:

1 MHz to 1 GHz

200 W RF Amplifier ENI 5100L or equivalent Gain:

50 dB Nominal

Bandwidth:

1.5 to 150 MHz

Table 1-1 Test Equipment Requirements

Type

Model

Specifications

Digital

Multimeter

(DMM)

HP34401

equivalent

Calibrator

Fluke

5100B

equivalent

HP8903B

equivalent

Frequency

Range:

Audio

Analyzer

kHz

Accuracy

±0.1

Phillips

PM6669

Frequency:

Frequency

Counter

equivalent

10Hzt01.3GHz

Reso

luti

on:

digits

HP8902A

(opt.

30,

32,

37)

Power:

equivalent

-20

+30

dBm

Power

Range:

Measuring

Receiver

.1t01GHz

Level:

Tuned

-127

dBm

Power

Accuracy:

±0.1

Measuring

Receiver

Sensor

HP11722A

equivalent

HP8901

equivalent

Meter

Range:

200

kHz

Meter

Accuracy:

Modulation

Analyzer

±1 % ±1

digit

Phase

Meter

Range:

200

Radians

Phase

Meter

Accuracy:

±3%

±1

digit

Accuracy:

MHz

Standard

±2

10-

(Traceable

NIST)

COM-120

Maintenance

Kit

7001-8743-800

Signal

Generator

HP8657A

equivalent

Amplifier

Research

Gain:

W RF

Amplifier

10W1000

Nominal

equivalent

Bandwidth:

MHz

GHz

ENI

OOL

equivalent

Gain:

200

Amplifier

Nominal

Bandwidth:

1.5t0150MHz

_._-

-------~-.---

-. _

...

-------

----

-----~.-

Table

1-1

Test

Equipment

Requirements

THE

FOLLOWING

a: a: a:

z W W W I

CALIBRATION

z I

W Z N l- I- Z

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«Q

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THIS

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MUST

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a:1-i= a:1-i=

a:~i=

::J-

zi= zi=

~a:i=

::J~

0::

«...J~

Zl-

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ASSEMBLY

PERFORMED

0«

w~«

w::J«

O<t

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f/)o::

Qo::

:::::i

O::I-a: _0::

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zoO::

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oco

wwco wwco wOco

woco

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WCO

I-co I-co O::E!!! w!!!

zo..-

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«-

(!)O:::::i (!)O:::::i

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0...J 0 wl-...J z...J

(!)::E:::::i

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u..::E« u..::E«

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1-8-1

1-8-2 1-8-3 1-8-4 1-8-5 1-8-6 1-8-7 1-8-8 1-8-9 1-8-10

1-8-11

1-8-12 1-8-13 1-8-14 1-8-15 1-8-16

•

MOTHERBOARD

BOARD

ASSEMBLY

ATTENUATOR

CONTROL

BOARD

ASSEMBLY

f--------

"---

I--------~---

f----------

---------

FRONT

PANEL

ASSEMBLY

DIGITAL

TRAY

•

CONTROLLER

TRAY

ANAL

VZER

TRAY

• •

RECEIVER

TRAY

• • •

SYNTHESIZER

TRAY • • • • • • • • • • • • •

GENERATOR

TRAY

• • • • •

POWER

TERMINATION

ASSEMBLY

•

GENERATOR

OUTPUT

ASSEMBLY

• • • • •

CONVERTER

ASSEMBLY

• • • • • •

REFERENCE

FREQUENCY

ASSEMBLY

•

FAN

ASSEMBLY

POWER

SUPPLY

ASSEMBLY

• • • • • • • • • • • • • • • •

8702001

Figure

1-1

Module

Replacement

and

Calibration

Requirements

•

1-4

1.8 CALIBRATION PROCEDU RES

1-8-1 POWER SUPPLY CALIBRATION

PREREQUISITES: NONE

EQUIPMENT REOUIRED: 1 Dlc|TAL MULTTMETER (DMM)

FIG URES: 1-2

STEP PROCEDURE

1. Apply Power to COM-12O8. Ailow 30 minute warm-up period.

2. Verify Voltages at Motherboard Connector 87A6J10 per Table 1-2 using DMM. Refer to

Figure 1-2 tor pin locations. Use Chassis f or ground.

Supply Voltage Locatlon

+13 V+13 Vdc (10.25 V) 8746J10 PtN 1.13

+35 V+35 Vdc (t1 V) 87A6J10 PtN 2.14

10.5 V-10.5 Vdc (t0.5 V) 8746J10 PtN 3.15

+10.5 V+10.5 Vdc (10.25 V) 87A6J10 PIN 4.16

+5 V Analog +5 Vdc (+0.2 V/-0.0 V) 87A6J10 PIN 5.17

+5 V Digital +5 Vdc (+0.2 V/-0.0 V) 8746J10 PrN 7,19

+12 V EL +12 Vdc (10.25 V) 87A6J10 PrN 9.21

Table 1-2 Power Supply Voltages and Locations

3. Set COM-1208 to OFF and disconnect test equipment.

1-5

1-8

CALIBRATION

PROCEDURES

1-8-1

POWER

SUPPLY

CALIBRATION

PREREQUISITES:

NONE

EQUIPMENT

REQUIRED:

DIGITAL

MULTIMETER

(DMM)

FIGURES:

1-2

STEP

PROCEDURE

Apply

Power

COM-120B.

Allow

minute

warm-up

period.

Verify

Voltages

Motherboard

Connector

87A6J10

per

Table

1-2

using

DMM.

Refer

Figure

1-2

for

locations.

Use

Chassis

for

ground.

Supply

Voltage

Location

+13

V +

Vdc

(±0.25

87A6J10

1,13

~~------

----,----,

f--~-~-~~---

---

-"-~-----

+35

Vdc

(±1 V)

87A6J10

2,14

-10.5

Vdc

(±0.5

87A6J10

3,15

10.5

+10.5

Vdc

(±0.25

87A6J10

4,16

Analog

Vdc

(+0.2

V/-O.O V)

87A6J10

5,17

Digital

Vdc

(+0.2

V/-O.O V)

87A6J10

7,19

+12VEL

+12

Vdc

(±0.25

87A6J10

9,21

Table

1-2

Power

Supply

Voltages

and

Locations

Set

COM-120B

OFF

and

disconnect

test

equipment.

1-5

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oli

\x:x:

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rooooooooorroor I

roo.o.o..o..... I

rooooorooorroot I

,aoooao.o.ooo.. I

roo.o.ooo..oo.. I

)aoooaoooooaaol I

raaoooaoooaaooe I

D..o.o.oao..oa.l

-t

87A6J10

8707009

Figure 1-2 Power Supply Voltage Locations (87A0J10)

1-6

•••••••••••••••••••

.......•...........

..................•

................

....•...•.••••..

......•..••••••.

••••••••••••••••••••

•••••••••••••••••••

87A6J10

Figure

1-2

Power

Supply

Voltage

Locations

(87A6J10)

8707009

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