Motorola R-2400 Operator's Manual

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Gommunications
$ervice

Monitor

OPERATORS'

MANUAL

R-2200/R-2400

\-

68P81069A79-B

I

\-

MOTOROLA

TEST

EQT'IPMENT PRODUCTS

LIMITEDWANNANTY

(EXCLUDES

EXPOnT

SHTPMENTS)

Motorota

Test Equipment

Products

(herein

thc

"product")

that

are manufactured

or disrributed

by Motorola

Communications

Group

parts

Department

are

warranted

by Motorola

for

a

pcriod

of onc

(t) ycar

from datc of shipment

against

defects in material

and

workmanship.

This

express warranty

is

extendcd

lo the

original

purchaser

only.

tn thc cvcnt

of a dcfect,

matfunction,

or

failure

during the

period

of

warranty,

Motorola,

at

its

option, will

cither repair,

or replace

the

product

providing

that Motorola

receives written

notice specifyirig

rhe

nature

of rhe

defect

during thc

period

of

warranty,

and

thc

defective

product

is rcturned to

Motorola at l

3

l

3 East

Algonquin

Road, Schaumbrirg,

lL

60l % transpona-

tion

prepaid.

Proof

of

purchase

and

evidence

of date of

shipment

(packing

list or invoice)

muit

actompany

the return

oiihe

defectiue

product.

Transportation

charges for the

return

of the

product

to

Purchascr shall

be

prepaid

by Motorola.

This

warranty

is

void,

as detcrmincd

in the rcasonable

judgemcnt

of Motorola, if

:

(a)

The

product

has

not

been opetated

in accordance with the

procedures

described in

thc operaring

instruction;

(b)

The seals

on non-user

serviceable

components or modules

arc broken;

(c)

The

product

has

been

subject to misuse,

abusc, damage, accidcnt,

negligence,

repair

or

alteration.

ln no

cvent shall Motorola

be

Iiable

for any

spccial, incidental, or

consequential damages.

ln

the

event

Mororola elects to repair

a defective

product

by replacing a module

or subassembly,

Motorola,

at

its

option, may replace

such defcctivc

module

or subassembly with

a

new

or reconditioned

replaccment module

or subassembly.

Only the unexpired

warranty

of thl wirranty

product

will

remain

in force

on the replacement

module

or subassembly.

EXCEPT AS

SPECIFICALLY

SET

FORTH HEREIN.

ALL wARRAivflfS

fx-

PRESS

OR IMPLIED,

INCLUDING

ANY IMPLIED

WARRANTY

OF FITNESS

FOR A PARTICULAR

PURPOSE

OR MERCHANTABILI.

TY, ARE

EXCLUDED.

EPS-30828-O

SUPPORT SERVICES

For

service on

your.Motorola

test e-quipment

in the.U.S. contact the Test Equipment

Service

Center, Schaumburg,

l3l3 E.

Algonquin

Rd.,

Scha^umburg,

-lllinois.

60!%

o1 call the Test Equipment

Service Hotline: 8ffi/323-696'l

during normal

businEis hours.

lri lllinois

cali

l-312-576-7025.

Outside the

U.S. contact

your

nearest Motorola representative.

MODULE

EXCHANGE PROGRAM

Modutar

construction of the R2001

allows field re-placement

of individual assemblies.

Contact

the Tesr

Equipment

Service Center

for

pricing

and

delivery.

Outside the U.S.

contact

your

nearest

Mbtorola representative.

COMPUTER SOFTWARE COPYRIG

HTS

The

Motorola

products

described in this instruction

manual may include

copyrighted Motorola computer

pro-

grams

slored

in

semiconduclor

memories or other

media. Laws in the

United

States

and other countries

preserve

for Motorola

certain

exclusive

rights

for copyrighted

computer

programs,

including the

exclusive

right

to copy or

reproduce

in

any

form the

copyrighted

computer

program.

Accordingly,

any copyrighted Motorola computer

pro-

grams

contained in the

Motorola

products

described

in this instruction manual may not

be copied or

reproduced

in

any manner without the

express written

permission

of Motorola. Furthermore, the

purchase

of

Motorola

products

shall not

be

deemed to

grant

either directly or by

implication, estoppel, or otherwise,

any

license

under the

copyrights,

patents

or

patent

applicaiions

of Motorola, except

tor the

normal

non-exclusive, royalty free

license to

use

that

arises by operation of law in

lhe sale

of a

product.

EPS-34440-B

Specillcetlonr

cubfcct

to

change without notice.

O,

Motorola, Prlvtto-Line,

and

Dlgital

Privalc-Line

are tradomarks

of Motorola, lnc.

I Prlnted in

U.S.A. f @

1985

Motorola

lnc.

@

',to,To',o,LA

tNc.

Communications
Sector

\-

\-

R-2200/

R-2400 Com

m

u

n icat ions

Service

Monitor

@Motorola,

Inc.

1985

All Rights Reserved

Printed in

U.S.A.

68PE1069A79-8

9/15/85

PHI

\-

@

frio'.o*oLA

t*c'.

TABLE

OF

CONTENTS

\-l

Paragraph

Page

Forward

..........v

Section I

-

Introduction

1.1.0

General

........1-2

1.2.0

Specifications.....

....1-2

Section 2

-

Description

2.1.0

Description

. .. ..2-l

2.2.0 MicroprocessorTechnology....

.....2-l

2.3.0

MultipleFunctions

....2-l

2.4.0

Portability

.....2-l

2.5.0

Durability

......2-l

2.6.0

Human

Engineering

. . .Z-l

2.7.0

AM/FM

Signal

Generator

. . . .2-l

2.8.0

SINADMetering

......2-l

2.9.0 DistortionMeter.

.....2-l

2.10.0 TerminatedRFPowerMeasurement

....

...2-l

2.11.0

Off-The-AirMonitor

........2-2

2.12.0

Off-The-Air

Private

Line

Frequency Counter

. . . . .

.2-z

2.13.0

MultipurposeOscilloscope.....

.....2-2

2.14.0

MultimodeCodeSynthesizer..

......2-z

2.15.0

SimultaneousModulation....

......2-2

2.16.0

Digital/AnalogVoltmeter.....

...,.2-2

2.17.0

SpectrumAnalyzer

....2-z

2.18.0

Two-WayServiceOption

.....2-2

Section

3

-

Operation

3.1.0 Introduction

.....3-l

3.1.1

SwitchesAndlndicators

.....3-l

3.2.0

General

....

.....3-l

3.2.1 PowerTurnOn

......3-l

3.2.2 Mode

Select

Switch

.

. . . i.

.. .3-l

3.2.3

FunctionSwitch

......3-z

3.2.3.1 GenerateFunctions

.....3-z

3.2.3.2 MonitorFunctions

......3-z

3.3.0

Liquid

Crystal Display

Mode

Select

. . .3-z

3.3.1 LiquidCrystalDisplays

.....3-2

3.3.1.1

Analog

Meter

Bars,/Digital Displays

.

. .3-z

3.3.1.2

SpecialDisplaySelectSwitches....

....3-z

3.4.0 Programming

Sequence

.. . .. .

.3-3

3.4.1

GeneratorAndMonitorFrequency

........3-3

3.4.1.1

FrequencyCopying

.....3-4

3.4.1.2 FrequencyStepping

.....34

3.4.2 Deviationlimit

......34

3.4.3 ToneData..

...3-5

3.4.3.1 PL ..

.....3-5

3.4.3.2

DPL,IDPL

......3-5

3.4.3.3

SingletoneA

....

.......3-5

3.4.3.4

SingletoneB....

.......3-6

3.4.3.5 A/BToneAndVoice

...3-6

\/

II

L

3.4.3.6

A,/BVariable....

......3-6

3.4.3.7

ToneRemote....

......3-6

3.4.4 CancellingEntries

....3-7

3.5.0

RFSection.r..i.

......3-7

3.5.1

RFln/OutConnector

......3-7

3.5.2

Antenna

.....3-7

3.5.3 StepAttenuator....

.......3-7

3.5,4

RF Vernier

. . .3-7

3.5.5

GeneratorOn/Off

........j-7

3.5.6

AttenuatorNotZero

.......3-7

3.6.0

Oscilloscope/ModulationScope

......3-8

3.6.1

IntensityControl

'...3-8

3.6.2 FocusControl

...

...3-8

3.6.3

HorizontalControl

........3-8

3.6.4 HorizontalVernierControl

....'..3-8

3.6.5 SourceSwitch

.......3-8

3.6.6

VerticalDisplayControl

.

'..3-8

3.6.7

Vertical Display

Vernier

.

. . .3-8

3.6.8

Vertical And

Horizontal

Position Controls

. . . . . .3-8

3.6.9

TriggeringModeControl

....

.....3-9

3.6.10

TriggeringlevelControl

.....

....3-9

3.6.11

Multi-Purpose Input

.

......3-9

3.7.0

MonitorSection

........3-9

3.7.1

Volume/SquelchControl

.'..3-9

3.7.2

lmageHi/LoControl

i..r..

.......3-9

3.7.3

BandwidthControl-Wide/Narrow...

...'.3-9

3.7.4 Demodulatoroutput

.......3-9

3.8.0 ModulationSection.....

......3-9

3.8.1 General ....

...3-9

3.8.2

OneKilohertzGenerator

LevelControl

.....

.....3-9

3.8.3

External Modulation Input Connector

.

. .

.

.3-9

3.8.4 MicrophoneConnector

......3-10

3.8.5

ExternalModulationSourceLevelControl

.....

..3-10

3.8.6

CodeSynthesizerlevelControl.....

......3-10

3.8.7 Modulation Switch

. . .3-10

3.8.8

CodeSynthesizerModeSelection

...

......3-10

3.9.0

RearPanelControls...

.......3-ll

3.9.1

Battery/External DC

Power Source

.......3-ll

3.9.2 External Power Connector

. . .3-l

I

3.9.3 AC Power Source Fuseholder

. . . . . .3-l I

3.9.4 DC Power Source

Fuseholder

. . . . . .3-l

I

3.10.0

Two-Way

Service

Option Operating

System

.

.

. . . . .3-12

3.10.1

DPL

/IDPL

Decode

.......3-12

3.10.1.1

DPLDecode

....3-12

3.10.1.2

IDPLDecode....

.....3-12

3.10.2

DTMFDecode

......3-12

3.10.2.1

Batch DTMF Decode

.

. .3-12

3.10.3

DTMFEncode

......3-13

3.10.3.1 RealTimeDTMFEncode

.....3-13

3.10.3.2

DTMF Batch Encoder

-

No PL . . .

. .3-13

3.10.3.3 UserDefinedTiming

DTMFBatchEncode ....

....3-14

3.10.3.4

PL

Frequency Select

. . .3-14

3.10.3.5 SimulPlandDTMFBatchEncode

....

....3-14

Section

4

-

Operating

Instructions

4.1.0 Operation ..

. ... .4-l

4.2.0

PowerUp...

....4-l

I

IU

4.2.1

Parameter

Memory

. . .4_l

4.2.2

DefaultParameters.....

....4_l

4.3.0

Generateoperation.....

......4_l

4.3.1

Outputlevel

........4-l

4.3.2

ModeSelect.

........4_z

4.3.3

Simultaneous

Generate

And

Measurement

Operation

. . . .4_z

4.3.4 TestingPagerDecodeAndAlertFunction....

....4_2

4.4.0

MonitorOperation

.....4_3

4.4.1

SensitiveMonitor

....4-3

4.4.1.1

Sens

Mon

With

Spectrum

Analyzer

(R-2400

only)

.

. .

.4_3

4.4.2

Power

Monitor

. .....4_3

4.4.2.1

Pwr

Mon

With

Spectrum

Analyzer

(R-2400

only)

.

. . .4-4

4.4.3

TransmitterDistortionMeasurements

....

.......4_4

4.4.4

Measurement

Of Transmitted

pL

. ..4_4

4.4.5

SimultaneousOscilloscope/DvMOperation

.....4-4

Section

5

-

Applications

5.1.0

Service

Shop

Setups

. .

. .5_l

5.1.1

SpectrumAnalyzer

.........5_l

5.1.2

Operating

Notes

For The

R-200

Service

Monitor

With

Spectrum

Analyzer

. . .

.5-l

5.2.0

ReceiverSensitivityTest

12dBSINADAudioDistortion

........5-2

5.3.0

Receiver

Sensitivity

Test

20

dB

euieting . . . .

.5_z

5.4.0

SquelchSensitivityTest

.

.....5_z

5.5.0

Audio

Power

Output Test

.

.

. .5_3

5.6.0

Audio

Frequency

Response

. .

.5-3

5.7.0 ModulationAcceptanceBandwidth

........5_4

5.8.0

RF Preselector

Shape

And Bandwidth

. . .

. . .5_4

5.9.0

ReceiverFrequencyAdjustment

.....5_4

5.10.0

Basic

FM

Transmitter

Test:

Power,

Frequency

And

Deviation

. .

. .5_5

5.11.0 TransmitterAudio

Distortion

.......5-7

5 .12.0 Transmitter

Audio

Frequency

Response

.

. . .

.5_7

5.13.0

AMModulationTest

........5-7

5.14.0

Cavity

And

Duplexer

Tuning

Bandpass

Adjustment

. .

. . .

.5_g

5.15.0

cavityAndDuplexerTuningBandpasswith

RejectNotch-ReceiveLeg

.......5-g

5.16.0

cavityAnd

Duplexer

Tuning

Bandpass

with

Reject

Notch

-

Transmit

Leg.

.

. . . .5-9

5.17 .0 Desensitization

Test

In

Service

Duplexer

. .

. .5-9

Section

6

-

Maintenance

6.1.0

BatteryKitlnstallation..

......6_l

6.1.1

BatteryCharging

.....6_l

6.1.2 Operation

From

An

External

DC

power

Source

. .

.6-l

6.1.3

Shippinglnstructions..

.....6_2

6.1.4 Two-WayServiceOption

Installation

......6_2

\.-/

IV

\,/

FOREWORI)

1.

SCOPEOFMANUAL

This manual is

intended

for

use by experiencqd

technicians

with

similar types

of

equipment.

It

contains

all

the

service

information required

for the equipment

described

and is

current as

of the

printing

date. Changes

which

occur

after

the

printing

date

are

incorporated by

Instruction Manual

Revisions

(SMR).

These

SMR'S

are

added

to the

manuals

as

the

engineering changes

are

in-

corporated

into the

equipment.

2.

MODELANDKITIDENTIFICATION

Motorola

equipments are specifically

identified by

an

overall model number

on the nameplate. In

most

cases,

assemblies

and

kits which make

up

the equipment

also

have

kit

model numbers

stamped on

them.

When

a

production

or

engineering change

is incorporated,

the

applicable schematic

diagrams

are updated.

As diagrams

are updated, information about

the

change

is

incorporated into a revision

column.

This

revi-

sion column

appears

in the

manual next to

the

parts

list

or,

in

some

cases,

on the

diagrarn. It

lists

the

reference

number,

part

number,

and description of

the

parts

removed

or

replaced.

3. SERVICE

The

Motorola

Test

Equipment

Repair Center

is

charged

with

the

service responsibility

for all

test

equip-

ment

supplied

by

the

Motorola

Communications Sec-

tor. The

center

maintains

a stock

of original equipment

replacement

parts

and

a complete

library

of

service

in-

formation

for

all Motorola

test

equipment.

Most in-warranty

repairs

are

performed

at

the

center.

Exceptions include

repairs

on

some equipment

not manufactured

by Motorola

which

are

performed

by

the

original

supplier

under

the

direction

of the

Motorola

Test Equipment Repair

Center.

Out-of-warranty

service

is

performed

on

a

time

and

materials

basis at

com-

petitive

rates.

Customer

satisfaction is

continually

surveyed

by

reply

cards

returned with

repaired

in-

struments.

The

Motorola Test

Equipment Repair

Center also

provides

a convenient telephone

troubleshooting

ser-

vice.

Frequently,

a user

technician

can

troubleshoot

a

piece

of

equipment

and

isolate

the defective

components

under

the

direction

of the

Motorola

Test Equipment

Repair

Center

via

telephone. Required

replacement

parts

are

then

immediately

shipped

to the

user

thereby

reducing

shipping time

and servicing

costs. For

telephone

troublehsooting

contact

the

Motorola Test

Equipment

Repair

Center

toll

free

at

(800)

3234967

.

All other inquires

and

requests

for test

equipment

calibration and repairs

should be directed to the

Motorola

Area

Parts

Office. They

will

contact

the

Motorola

Test Equipment

Repair

Center,

process

the

necessary

paperwork

and,

if necessary,

have the

Center

contact

you

to

expedite

the repair:

4. REPLACEMENT

PARTS

ORDERING

Motorola

maintains

a

number

of

parts

offices

strategically located

throughout

the

United States.

These facilities

are staffed to

process

parts

orders, iden-

tify

part

numbers,

and otherwise

assist

in

the

maintenance

and

repair

of Motorola

Communications

products.

Orders for

all

replacement

parts

should be sent to

the nearest

area

parts

and service

center

listed

below.

When

ordering replacement

parts

the

complete

iden-

tification

number

located

on

the

equipment

should be

included.

V

6tPt1W2Et6ffi

-

J.

5.1

ADDRESSES

GENERAL

OFFICES

MOTOROLA

Communications

and

Electronics

Inc.

Communications

&

Electronics

parts

l3l3

E.

Algonquin

Rd.,

Schaumburg,

Illinois

60196

Phone:

312-576-3900

U.S.

ORDERS

WESTERN

AREA

PART^S

I 170

Chess

Drive,

Foster

City

San

Mateo,

California

94404

Phone

:

415-349-8621

TwX:

910-375-3877

MIDWEST

AREA

PART^S

l3l3

E.

Algonquin

Rd

Schaumburg,

Ill.

60196

Phone:

312-576-7430

TwX:910-6930869

MID.ATLANTIC

AREA

PARTS

7230

Parkway

Drive

Hanover,

Maryland

20176

Phone:

301-796-8763

TWX:

710-862

-1941

EAST

CENTRAL

AREA

PARTS

12995

Snow

Road

Parma,

Ohio

4/130

Phone:

216433-1560

TWX:

810-421-8845

EASTERN

AREA

PARTS

85

Harristown

Road

Glenrock,

New

Jersey

07452

Phone:

20144/'-96fi2

TWX:710-988-5ffi2

ROCKY

MOUNTAIN

AREA

PARTS

20 Inverness

Place

E.

Englewood,

CO

80112

Phone:

303

-790-2323

TWX:

910-935-0785

PACIFIC

SOUTHWESTERN

AREA

PARTS

P.O.

Box

8i036

San

Diego,

California

g2l3g

Phone:

7l4-S7B-8030

TWX

:

910-335-1

516

GULF

STATES

AREA

PARTS

I140

Cypress

Station

P,O.

Box

73lls

Houston,

Texas

77090

Phone:

713-537

-3636

TWX:

910-88

l=6392

SOUTH

WESTERN

AREA

PARTS

P.O.

Box

34290

3320

Belt

Line

Road

Dallas,

Texas

7

5234

Phone:

214-620-851

I

TWX:

910-860-5505

SOUTHEASTERN

AREA

PARTS

P.O.

Box

368

Decatur,

Georgia

30031

Phone:

504

-987

-2232

TWX:

810-766-0876

CANADIAN

ORDERS

MOTOROLA

LTD.

National

Parts

Department

3125

Steeles

Avenue

East

Willowdale,

Ontario

M2H

2H6

Phone:

416499-144l

TWX:

610-491-1032

Telex:

06-526258

Att

COUNTRIES

EXCEPT

U.S. AND

CANADA

MOTOROLA,

INC.

International

Parts

Dept.

l3l3

E.

Algonquin

Road

Schaumburg,

Illinois

60196

u.S.A.

Phone:

312-576-6/,82

TWX:

910-693-0869

Telex:

722U3

Cable:

MOTOL

PARTS

5.2

\..-/

\,'/

5.3

5.4

fiPtrM2Wrc.o

VI

\-/,

MOTOROLA

TEST

EQUIPMENT

PRODUCTS

AUTHORIZED

WARRANTY

SERVICE

CBNTERS

MotorolaC&EParts

Test

Equipment

Service

Center-East

1313

E.

Algonquin

Road

Schaumburg,

IL

60196
1-800-323-6967
I-312-57

6-7 025

(Illinois

Only)

MAMS:

NAGOU

TTY:

910-693-0869

MotorolaC&8,

Inc.

Hawaii

Service

Center

99-1180

Iwaena

Street

Aiea,

HI

9670I

1-808-487-0033

TTY:

63212

Motorola

Australia

Pty.

Ltd.

Test

Equipment

Service

Center

666 Wellington

Road

Mulgrave,

VIC

3170

Melbourne
Phone:

3-561-3555

Telex:

32516

MOTOCOMA

AA

Cable:

MOTOCOM

MELBOURNE

MAMS:

FEMEL

Motorola

GmbH

F

and

V

ABT.

Frachtzentrum

FZF

6000 Frankfurt

Main/Flughafen

West

Germany

Attn:

METEC

Phone: (0)

6128-702130

Telex: (0)

4182761

MOT

D

Motorola

S.A.

Test

Equipment

Service

Center

14, Allee

du

Cantal

CE

1455

91020

Evry

Cedex

Phone:

(6)

077

.790.25

Telex:

.600434F

MOTEV

MAMS:

FAFEV

Motorola

Canda, Ltd.

Test

Equipment

Service

Center

3420 Pharmacy

Avenue

Unit

11

Scarborough,

Ontario

MIW 2P7

Phone:

(416)

499-1441

TTY:

610-492-2713

MAMS:

NAWIL

Motorola
Motorola
5th

Street

P.O.

Box
Wynberg
Phone:

011-786-6165

Tele>u

422-070

SA

CABLE:

MOTOROLA

JOHANNESBURG

MAMS:

FESAF

Test

Equipment

Service

Center-West

23338.

Utah Avenue

El

Segundo,

CA

90245

r-2t3-536-0784

South Africa

(Pty.)

Ltd.

House

39586

VII

''o'noFlro,',/l

tuc..

Communicafions
Sector

SAFE

HANDLING

OF

CMOS

INTEGRATED CIRCT]IT

DEVICES

Many

of the

integrated

circuit

devices

used

in

com-

munications

equipment

are of the

CMOS

(Complemen-

tary

Metal

Oxide Semiconductor)

type.

Because

of

their

high

open

circuit

impedance,

CMOS

ICs are

vulnerable

to

damage

from static charges.

Care

must be

taken

in

handlitrg, shipping,

and servicing

them

and

the

assemblies

in

which they

are used.

Even

though

protection

devices

are

provided

in

CMOS

IC inputs, the

protection

is

effective

only

against

overvoltage

in

the

hundreds

of

volts range such

as

are

encountered

in

an

operating system.

In a

system,

circuit

elements

distribute

static

charges and

load the

CMOS

circuits,

decreasing

the chance of

damage.

However,

CMOS

circuits

can be

damaged

by

improper

handling

of

the

modules

even

in

a system.

To

avoid

damage

to circuits, observe

the

following

handlitrg, shippitrg,

and servicing

precautions.

l. Prior to and

while

servicing

a circuit

module,

particularly

after

moving

within

the

service

area,

momentarily

touch

both

hands

to

a bare

metal earth

grounded

surface.

This

will

discharge any

static

charge

which

may have

accumulated

on the

person

doing

the

servicing.

NOTE

Wearing Conductive

Wrist Strap

(Motorola

No. RSX40I5A)

will minimize

static

buildup during

servicing.

WARNING

When wearing

Conductive

Wrist

Strap,

be

careful

near

sources

of

high

voltage.

The

good

ground provided

by

the

wrist

strap

will

also

increase

the danger

of

lethal

shock

from

accidentially

touching

high

voltage

sources.

2. Whenever

possible,

avoid

touching

any elec-

trically

conductive

parts

of the circuit

module with

your

hands.

3.

Normally, circuit

modules

can be

inserted

or

removed with

power

applied to

the unit.

However,

ChCCK thc INSTALLATION

ANd

MAINTENANCE

SCC-

tions of the manual

as

well

as the

module

schematic

diagram

to

insure

there

are

no

objections to this

prac-

tice.

4. When

servicing a circuit

module,

avoid

carpeted areas,

dry

environments,

and certain

types

of

clothing

(silk,

nylon,

etc.) because they

contribute to

static buildup.

5. All

electrically

powered

test equipment should

be

grounded.

Apply

the

ground

lead

from

the test

equipment

to the

circuit

module

before

connecting

the

test

probe.

Similarly,

disconnect

the test

probe

prior

to

removing

the

ground

lead.

6. If a

circuit

module

is removed

from the

system,

it is

desirable

to

lay it

on a

conductive surface

(such

as a

sheet of

aluminum

foil)

which is

connected to

ground

through

l00k

of

resistance.

WARNING

If the aluminum

foil

is

connected

directly

to

ground,

be cautious

of

possible

elec-

trical shock

from contacting

the

foil at the

same

time as other

electrical

circuits.

7. When soldering,

be

sure the

soldering

iron is

grounded.

8.

Prior

to connecting

jumpers,

replacing circuit

components,

or touching

CMOS

pins (if

this

becomes

necessary in

the replacement

of an

integrated circuit

device), be sure

to

discharge any

static buildup as

described

in

procedure

l.

Since

voltage

differences can

exist across

the

human body,

it is recommended

that

on-

ly

one

hand

be used

if

it is

necessary

to touch

pins

on the

CMOS

device

and associated

board

wiring.

\-

@

Motorola, Inc. l9t2

All

Rights Reserved

Printed

in

U.S.A.

@ehnrlleorll

uur

fl

ltfrng

refrvlteet

6tPt1106Et4{

t2/t0/82-

PHI

1301

E.

Algonquln

Road,

Schaumburg,

ll.001S

9. when

replacing

a

cMos

integrated

circuit

device,

leave

the

device

in

its

metal

rail

container

or con-

ductive

foam

until

it

is

to

be

inserted

into

the

printed

cir-

cuit module.

device

inputs

after

power

is

applied

to

the

cMoS

cir-

cuitry.

Similarly,

such low

impedance

equipment

should

be

disconnected

before

power

is

turned

off.

I l.

Replacement

modules

shipped

separately

from

the

factory

will

be

packaged

in

a

conductive

material.

Any

modules

being

transported

from

one

area

to

another

should

be wrapped

in

a simlar

material

(aluminum

foil

may

be used).

NEVER

usE NoN-

coNDUcTIVE

MATERIAL

for

packaging

these

modules.

10.

All

low

impedance

test

pulse

generators,

etc.)

should

be

equipment

(such

as

connected

to

CMOS

\-,

\-/

A

\-/

\-

\-

SECTIONI

Figure

l-1.

Communications

Service

Monitor

\-

1-1

1.1.0

GENERAL

This

section

lists

the physical,

electrical

and input/output

characteristics

of

the

Communications

Service Monitor

shown

in

figure

1-1.

T.2.0

SPECIFICATIONS

SECTION

1

SPECIFICATIONS

Modes: AM/FM

Generate, Monitor

Power Monitor,

Voltmeter DC, RMS,

AC, RF

Wattmeter

and

Load,

Oscilloscope

General

OSCILLOSCOPE

Size: 2.5

in

diagonal

Freq. Response: DC to .5 MHz

(3

dB

point)

Signal Generator Mode

FREQUENCY

Range: 200

k{z

to

999.9999 MHz

Resolution:

100

Hz

Accuracy:

Same as time

base

EXTERNAL VERTICAL

INPUT 10 mV,

100 mV, 1 V, 10 V

per

division

Ranges: 1us, 10us, 100us, 1ms, 10ms, 100ms

per

Sweep

Rates: division

Sync:

Automatic

or adjustable

level

triggering

OUTPUT

(16

dB

variable

in 10

dB steps

over

8

ranges)

Range: .05uV to

800uV

(low

level

output)

40uV to

1V

(high

level

output)

Accuracv:

ii

3B

[1,T,,ffJ,.1,'u,,13 ]&'flff9",8t

38til,'ii

rever

freq. range

+3

dB leveling

over the

750 MHz to

999.9999 MHz frequency

range

+

1 dB over the

operating temperature

range

ret.

25o C

DIGITAL VOLTMETER

Readout:

3 digit Autoranging

1, 1q

100,

300

volts full scale

DC Accuracy:

*

1dlo F.S.

+

L-Sd

AC

Accuracy:

+

5%

F.S.

AC

Bandwidth:

50

Hz to 10 kHz

CODE SYNTHESIZER

&

AUDIO

GEN.

Frequency Range:

50

Hz

to

9.999

kHz

Resolution:

0.1

Hz

50

to 1000 Hz, 1 Hz 1000 Hz to

9999 Hz

Accuracy: *..01o/o

Special

Function:

PL, DPL, DPL

invert,

2 tone

sequential,2

tone

variable, tone remote

Output Level:

0

to

3

RMS

@

600

Ohms

PURITY

Spurious:

-40

dB

Harmonics:

-15

dB

(step

attenuator-0

dB,0 dBm out)

FREQUENCY

MODUI.ATION

Deviation:

0 to 50 kHz

peak

FM

Noise: 100 Hz

Extemal/lntemal

Frequency Range:

5

Hz to

10 kHz

Modes:

External, internal

or microphone

(any

or all)

SINAD Meter

lnput level range: .5

V to

10 VRMS

Accuracy:

+

1

dB

@

12

dB SINAD

Distortion:

(1

kHz

using code

synthesizer

lor

tone)

Range:

0

to

35 dB

lnput

Level Range: .5 V to 10 VRMS

Accuracy

Soh of F.S.

from

1o/o to

ffi%

PL

Counter

Range:

60

to 270 Hz

Resolution:

0.1

Hz

AMPLITUDE MODUI.ATION

Range:

0

to

50%

from

1 to

500

MHz

Extemal/lntemal

Frequency Range:,

100 Hz-10

kHz

(+

1

dB)

Extemal

lnput Approx.

150mV for

50% BNC connector

Modes: lnternal,

external, microphone

or all

simu

ltaneously

TIME

BASE

Standard

TCXO:

Aging

+

1 x 10€ Yr Temp. +

1 x 10€ from

0

to

+55

C

Optional OCXO: Aging

+

1 x 10€ Yr Temp.

+

5

x 10€ max.

Monitor Mode

Frequency Range:

3

MHz

to

999.9999 MHz

useable

to 100 KHz

with

reduced

sensitivity.

Resolution:

100 Hz

Accuracy:

Same as time

base

Frequency

Enor

lndicator:

Digital Display

of

frequency

error and bar

graph

Power

and Environmental

Battery

Weight:

Temp.

Range:

Dimensions:

AC:

90 to

130, 180

to 250

V

ac,

50/60

Hz

DC:

+11.0to +17Vdc

Optional

Battery: 12V

battery

provides

approx. t

hr.

contlnuous

Weight:

operation

8

lbs.

(3.63

kg)

0to

+55C

71/2" high x 121/2" wide x 14"

deep

(19.0

cm

x

31.8 cm x 35.6

cm)

30

lb.

excluding battery

pack

(13.6

kg)

Sensitivity: 1.5

uV

for

10

dB

EIA

SINAD

(narrowband

+

7

(Over

the 3 MHz

to KHz

mod.

acceptance)

5 uV

for 10

dB

EIA

999.9999 MHz range)

SINAD

(wideband

+

100 kHz

mod.

acceptance)

5 uV

for

10 dB EIA

SINAD

AM

Spurious Response:

-40

dB

Typical

0 dB

image

+

21 .4

MHz

-10

dB at L.O. harmonic

+

10.7 MHz

R-2400

Spectrum Analyzer

FM DEVIATION

MEASUREMENT

Range: 1, 10, 100

kHz full

scale

Accuracy:

+5o/o

of

reading

+

100 H2,500

Hz to

50

kHz

deviation,

+

10o/o

of reading

50 kHz to 75 k{z

Dispersions:

1, .1, .01

MH/div

Dynamic

Range:

55 dB min.

Measurement

Range:

-100

dbm

to

+

27

dbm at Antenna connector

using

internal

RF

step attenuator

Accuracy:

+

/-5 db absolute

(at

frequencies

below 800

MHz);

+ l-2

db

linearity.

Useable

to

+

51 dbm at

RF

ln/Out

conn.

(level

uncalibrated)

Display Range:

Level:

6 divisions at

10

db

per

division

Frequency:

8 divisions

with

switch

selectable

dispersions of

1,

.1, and .01 MHz

per

division

Dynamic Range: Noise

desensitization:

-55

dbc at

.01 MH/div.

dispersion and

25

KHz

freq.

offset;

-70

dbc

at

1 MHzJdiv.

dispersion and

1

MHz offset.

Audio Monitoring:

Simultaneous

Monitor

function

with spectrum

analyzer display of

received

signal.

AM MODULATION

MEASUREMENT

Range:

0 to

1@%

Accuracy:

+

Soh

of full

scale

RF WATTMETER

AND LOAD

Frequency Rrnge: 1 MHz

to 1000 MHz

Power Range: .5 watt to

125 watt

Accuracy:

+

10o/o

Protection:

over

temp.

and over

power

alarms

\_/

\..-/

L-2

\r'

SECTION 2

DESCRIPTION

2.I.0

DESCRIPTION

The

R-2200

and

R-2400

are test instruments

designed

and

manufactured

by Motorola

to

perform

the

most

commonly

used tests

on

radio

communications equip-

ment.

Rugged

and

portable,

the Communications Serv-

ice

Monitors

are designed for

technician

productivity.

2.2.0 MICROPROCESSOR

TECHNOLOGY

The

R-2200

and

R-2400

Communications

Service

Moni-

tors use

advanced engineering

design

based

upon a

Motorola

M-6800

series

microprocessor.

The

units

fea-

ture

liquid

crystal displays

(LCD)

and a

sealed

mem-

brane keyboard for

easy

and accurate

entry

of data.

The

LCD's

show exactly what

displays

and

functions are ac-

tive

at any time. The

displays

change as

you

switch

monitor

functions,

and

prevent

you

from

selecting

an

invalid readout.

2.3.0 MULTIPLB

FUNCTIONS

The

microprocessor

design permits

a

wide variety of

service

applications. The

R-2200

is capable

of

perform-

ing tests

which require:

Modulation

Oscilloscope

"Off-the-Air"

PL

Counter

Multimode

Code

Synthesizer

AC/DC Digital

Analog

Voltmeter

General Purpose

Oscilloscope

SINAD Meter

Distortion

Meter

RF

Wattmeter

as

well

as

the

traditional

service

monitor functions

of

SIGNAL GENERATION, FREQUENCY

ERROR and

MODULATION measurements.

In

addition,

the

R-2400

provides

a

spectrum

analyzer

display

while

simultaneously

monitoring

the received

signal.

2.4.0 PORTABILITY

Weighing under 30

lbs.

(13.6

kg),

the unit's

form

factor is

engineered

for

ease

of

carrying. The optional

internal

battery

allows t

hour

continuous operation.

Time

is

saved

since

the technician

has to transport

less equip-

ment and does not have

to

take time to unpack,

hook-up,

disconnect and repack

additional

equipment.

2.5.0 DURABILITY

The R-2200

and

R-2400

are field

environment

tough and

meet the

shock and

vibration

portions

of

EIA specifica-

tion

RSl52B. The

units have

been

subjected

to

acceler-

ated

life

testing, during the

design

stage,

to ensure

the

best

possible

design and

reliability.

The Mylar covered

keyboard

is

sealed against moisture,

dirt,

dust and oil.

2.6.0

HUMAN

ENGINEERING

The R-2200

and

R-2400

are

human

engineered.

The

membrane keyboard with

audible

feedback

ensures ac-

curate

data

entry.

Front

panel

controls are

grouped

by

function for

simple operation.

The microprocessor

con-

trolled

LCDs

provide

autoranging analog

and digital

displays.

2.7.0 AM/FM

SIGNAL GENERATOR

The built-in

general purpose

signal

generator

provides

continuous coverage of

the HF, VHF, and

UHF

land

mobile spectrum for receiver testing.

Many forms

of

external and internal

modulation

can

be

simultaneously

impressed on

the carrier

signal for

actual

composite

sig-

nals. The

frequency

range

of the

RF

signal

generator

is

from

200

KHz to 1.

GHzin

100 Hz steps. The output of up

to 1 VRMS

provides

sufficient amplitude

to

get

through

misaligned

tuners

and

receivers

and

is

especially effec-

tive

when

changing a receiver's frequency. The

high

level,

calibrated output is

available over the entire

fre-

quency

range of

the Communications Service

Monitor.

2.8.0

SINAD METERING

A comprehensive

check

of receiver

performance

can

be

made

with

a SINAD

measurement.

The analog

meter

bars and

digital display of

SINAD appear

automatically

whenever that measurement mode

is selected.

Hook-up

is simple

with only two

connections

required

and

measurements

can then be accomplished without

the

need for

a

separate signal

generator,

SINAD

meter

or

distortion

analyzer.

2.9.0 DISTORTION

METER

The distortion meter

provides

receiver or

transmitter

audio stage

quality measurement without a separate

sig-

nal

generator

or distortion meter.

It

also

provides

higher

resolution

than an oscilloscope

to ensure the

radio

under

test

meets

all distortion

specifications.

2.IO.O TBRMINATED

RF POWER MEASUREMBNT

RF

power

is measured

when the

Communications

Ser-

vice Monitor

is

in

the

power

monitor mode.

The built-in

RF load dissipates

up

to L25 watts. If a higher

powered

transmitter

should be

keyed into the unit

or if a

lower

power

transmitter is keyed into the

unit

for a

prolonged

time threatening

overheating of the

power measuring

circuitry,

the audible alarm sounds and the

LCD's

dis-

play

changes to read

"OVER

POWER"

or

"OVER

TEMP",

thus

warning the technician to

de-key.

The in-

strument is further

enhanced

by the simultaneous

indica-

tion of RF

power

output, carrier

frequency error

and

modulation,

all

at the same time.

L

2-l

2.II.O

OFF.THE-AIR

MONITOR

The

1.5

microvolt

sensitivity

of

the

Communications

Service

Monitor

receiver

allows

off-the-air

monitoring

and

measurement

of

transmitter

frequency

error

and

deviation

to

1000

MHz.

A variable

squelch

attows weak

signals

to

be

monitored,

but

can

be

set

tighter

to ensure

the

proper

signal-to-noise

ratio

for

measurement

accura-

cy.

The

off-the-air

monitor

function

enables

frequent

parameter

checks

without

leaving

the

shop,

thus

spotting

system

degradation

early

and

keeping

service

costs

down.

Bandwidth

can

be

set

"'WIDE"

Tor

off-channel

signal

location

or

wide

band

FM;

or

"NARROW'''

for

maximum

sensitivity

and

selectivity.

2.12.0

OFF-THE-AIR

PRIVATE

LINE

FREQUENCY

COUNTER

Identifies

the

PL

frequency

of

any

radio

under

test to

allow

complete

testing

of PL

subaudible

tone

signalling.

2.I3.0

MULTIPURPOSE

OSCILLOSCOPE

This

general

purpose

scope

is ideal

for

waveform

analysis

in two-way

communication

servicing.

Use

it

for viewing

modulation

signals (either

internallyor

externally

gener-

ated),

detection

of

asymmetric

modulation

or

audio dis-

tortion,

and

general

purpose

signar

tracing

and

trou-

bleshooting.

2.14.0

MULTIMODE

CODE

SYNTHESIZER

The

Communications

Service

Monitor generates

pRI-

VATE

LINE

tones (PL),

DIGITAL

PRIVATE

LINE

codes

(DPL),

two-tone

sequential

paging

codes and

tone-rernote

signalling

tones.

All

codes

are

available at

the

"MOD

OUT"

jack,

as well

as

being

used

internally

to

modulate

the

RF

signal

generator.

This

eliminates the

necessity

of

using

separate

generators

and oscillators

for

general

servicing,

setting

transmitter

deviation,

or for

checking

tone

remote

base

control

lines.

2.15.0

SIMULTANEOUS

MODULATION

Modulation

is

simultaneously

available

from

an

internal

I

KHz

tone

generator,

a multimode

code

synthesizer,

and

from

external

inputs.

The

external

modulation

can

be voice

from

a standard

Motorola

mobile

radio

micro-

phone

(which

plugs

into

the front

panel

of the instru-

ment),

os well

as

a signal

applied

to

the

external

BNC

input.

Separate

controls

are

provided

for

independently

setting

the

levels

of

the 1

KHz

tone,

tlr.

code

synthesizer,

and

the

external

modulation

sourcis.

The

i KHz

test

tone

is

a

convenient

source

of

modulation

for

making

SINAD

measurements.

A

"MOD

OUT"

connector pro-

vides

external

access

to

all

of

the

modulation

signais.

2.16.0

DIGITAL/ANALOG

VOLTMETER

The

built-in

voltmeter

provides

circuit

and power

supply

service

capability.

AC voltage

reading

are RMS

valGs.

2.17.0

SPECTRUM

ANALYZER

The

R-2400

includes

a

spectrum

analyzer

which

pro-

vides

frequency

spectrum

display

while

allowing

the

user

to

monitor

the

audio

of

the

programmed

frequency

signal.

Three

dispersions

of

l,

.1,

and

.01

MHz/Oiu

are

available.

In

"Anlzr Sens

Mon",

the

',Antenna"

port

is

used.

The

range

of

power

levels

displayed

when

the

step

attenuator

is in

the

0

dB

position

is

-40

dBm

(top

graticule)

to

-100

dBm

(noise

floor).

Vertical

divisions

are

l0

dB

each. When

70

dB

attenuation

is

added

using

the

step

attenuator,

the

range

of

power

levels

displayed

becomes

+

27

dBm

to

-30

dBm.

Care

must

be taken

to

not

exceed

the

maximum

input

level

of

.5

watt

(+27

dBm)

at

the Antenna

input.

In

"Anlzr

pwr

Mon",

the

RF

signal

that

is

applied

to

the

"RF

rn/out"

port

is

sampled

and

displayed.

The

required

amount

of

at-

tenuation

to

maintain

an

on-screen

display

can be

ad-

justed

with

the

step

attenuator.

2.IE.O

THE

FIRST

IN

A

SERIES/TWO.WAY

SERVICE

OPTION

The

Two-wAY

SERVICE

oPTIoN

is

the

first

in

a

series

of

new

option

cards. This

pC

board,

plug

in

compatible

with

any

R-22a0

(or

R-2400)

via

an

open

option

module

slot

and

comes

equipped

with

the

following

functions:

TWO-WAY

SERVICE

OPTION

DPL

DECODE

DTMF

ENCODE

DTMF

DECODE

Some

of

the

major

features

of

the

DpL

Decoder

in-

cludes

OFF-THE-AIR

decoding

of

DpL

or IDPL

codes.

The

Two-way

Service

option

will

decode

only

valid

DPL

codes

and will

not

display

invalid

codes.

with

the

DPL

encoder,

standard

in

every R-2200

(or

R-2400),

the

service

technician

has

a

,,failsafe

opera-

tion"

making

it

easier

and

less

time

consuming

when

performing

a

complete

DPL

system

check.

The

option

card

also provides

multiple

methods

in which

to

encode

DTMF

tones.

The

most

basic

form

of

generating

DTMR

a real

time

encoder,

is

one

selection

possible.

Therc

are

also

encoding

formats

available

for

operator

selection

which

include:

1) l6

digit

storage

(BATCH

ENCODE)

,2)

user programmable

timing,

and

3)

simultaneous

pL

and

DTMF

encode.

A

last

function

of

the Two-Way

Option

is DTMF

Decode.

In

this

mode

the

service

monitor

will

decode

DTMF

tones

OFF-THE-AIR

or via

the

modulation

input

BNC

connec-

tor.

This

option

will

decode

and

store

up

to

16 DTMF

digits.

with

DPL,

DTMF

and

the

standard

pL

Encode

and

Decode

built-in,

the R-2210

and R-2410

Communica-

tions

Service

Monitors

qualify

as

a

complete

signalling

simulator,

capable

of

performing

a

complete

signalling

system

check

on

the land

mobile

industries

most

com-

mon

signalling

formats.

\-/

\-/

2-2

\-/

\-

\,-

SECTIOI\3

OPERATION

3.1.0 INTRODUCTION

To become

proficient,

an

operator

must

know the

equip-

ment

and its

capabilities.

Before

operating

the

service

monitor,

carefully

study

the purpose

and function

of

each

switch

and

indicator

described

here

and

become familiar

with

the

operating procedures

given.

3.1.1

SWITCH

AND

INDICATORS

See figures

I

,2,3

,,4,5

,6,7

,,

and

8

for

the location

of

assemblies,

controls

and indicators

on

the front

of

the

service

monitor.

3.2.0

GENERAL

The

service monitor

is

the radio

communication

techni-

cian's

universal

tool.

It is

required

to

service and

main-

tain

most

AM,

FM

and

Cw

two-way

radio

equipment

and needs

to

provide

accurate

measurements,

have

dur-

ability

and offer fast,

efficient

use. This

service

monitor

was

designed

to meet

all

these

criteria. A

front

view

of

the

service

monitor,

(figure

3-l

),

reveals

two

liquid

crystal

displays which

will

provide

the digital and

analog

readouts

for

any mode

of

operation

selected.

To

the

left,

is

a modulation

oscilloscope

to

display

modulation

waveforms

received

or

generated

by the

service

monitor.

It

can also

be used

as

a

general

purpose

oscilloscope for

routine

trouble

shooting

procedures.

In

the

R-2400,

it

functions

as a

spectrum

analyzer.

A

sealed

membrane

keypad

is

used for

all

data

entry. Each

time

a

pushbut-

ton

is

actuated

an

audible

feedback

tone

will

tell the

operator

the

entry

has

been

accepted.

Operation

is

discussed

in

paragraph

3 .4.0.

Specific

controls are

grouped

by function

and

outlined

with

red

graphics

to

reduce

operator

confusion.

Each

section

will

be

covered

in

detail later.

The

RF

SECTION

with

RF

carrier

rn/out

controls is

at the

bottom

left.

The

OSCILLO-

SCOPE

controls

are to

the right

and

include

the multi-

purpose

input

used for

SINAD,

distortion,

digital volt

meter

and

oscilloscope

vertical

inputs.

In

the

R-2400,

the frequency

dispersion

is

controlled

by this

section.

Next is

the MONITOR

section

with

speaker

and squelch

controls

for

off the

air

monitoring

and

on the right,

a

MULTIMODE

CODE

SYNTHESIZER

to

allow

the

technician

to modulate

an

RF

carrier

signal with

PL,DPL,

timed

signalling formats,

and external

sources

such

as a microphone

or audio

generator.

3.2"1

POWER

The

power

on/off

switch is

a three

position

toggle

switch.

In the

full

down

position,

"OFF",

the

unit is turned

off.

The

center position,

"STBY",

removes

power

from

all

circuits

except

for

the

battery

charger

and

frequency

standard.

This

allows

battery

charging when

not in

use

and maintains

stability

of the

crystal

oscillator.

This

is

especially

important

for

high

stability

units. In the

up

position, "ON",

all circuits

are

powered.

3.2.2

MODE

SWITCH

The

mode

select

switch

is a three

position

toggle switch

which

selects

the

type

of signal

to be

monitored

or

gener-

ated. The

"FM"

position

allows the

unit to

monitor

or

generate

frequency

modulated

signals.

The

"C'W""

posi-

tion

allows

the

unit to

generate

unmodulated

RF

signals

and

the

"4M"

position

generates

or monitors

amplitude

modulated

signals.

FIGURE

3-I_CLOSEUP

FRONT

VIEW

3-1

\-

3.2.3 FUNCTION

SWITCH

3.2.3.1

GENERATE

FUNCTIONS

The

function

switch

is

a

four position

rotary

switch

which

permits

the service

monitor

to

be

used

as

an RF

signal generator

specified

from

200 kHz

to

999.9999

MHz

or

an RF

signal monitor

specified

from

1

MHz

to

999 .999

MHz.

In the

"HI

GEN"

(high

generate)

function

the

unit

generates

and outputs

an RF

signal

and is

capable

of

200

uV to 1

VRMS

output

on

any

frequency

within

the

specified

range. The

1

volt

output

level

is

sufficient

for

transmission

through

an

antenna

connected

to

the

antenna

connector.

In the

"GEN"

(generate)

function

the

unit

generates

an

RF

signal

for direct

connection

to

the antenna input of the

equipment

under

service

with

output

levels from .1

uV

to

200

uV.

3.2.3.2 MONITOR

FUNCTIONS

The

"SENS

MON"

(sensitive

monitor)

function

allows

the unit to

monitor

low

level

signals. The 1.5

microvolt

sensitivity

allows off

the

air

monitoring

of a remote

transmitter's

frequency

error and

deviation/0/o

modulation

(of

modulated

car-

riers).

Hookup

is made

to

the

"ANTENNA" connector.

Selecting

the

"PwR

MoN"

(power

monitor) function

permits

the

service monitor

to

operate

as an

RF watt-

meter,

allowing

direct

output

power

measurement

of

transmitters within

the range

of

.5

to 125 watts. Fre-

quency

error

and

deviation/

t/o

modulation

measure-

ments

are

also

available in

the

"PwR

MON" function.

Hookup

is

made

to

the

"RF

IN/OUT"

connector. The

R-2400

has

two

additional

function

switch

positions,

"Anlzr

Sens Mon"

and

"Anlzr

Pwr

Mon"

which

are used

to enter

the

analyzer mode

of operation.

In

"Anlzr

Sens

Mon",

the

signal

applied

to

the

"Antenna"

input is

displayed. In

"Anlzr

Pwr

Mon",

the

signal

applied

to

the

"RF

Inlout"

input

is

displayed.

All

other

functions

are the same

as

for

"Pwr

Mon"

and

"Sens

Mon".

3.3.0

[,IQUID

CRYSTAL DISPLAY

MODE

SELECT

Notice

the

cursor

controls

tr

on

the left and

right

LCD's.

These

controls

select

the various

measurement

modes.

Each

time

the

cursor

control

is

depressed

the

annunciator

DOT

located

on the

left

side

of each

LCD

screen

will

move

and an

audible

feedback

tone

will

verify

actuation.

The

equipment

is

programmed

to suppress

measurement

modes not

relevant

to the

selected

service

monitor

function.

For

example,

when

in

the

"GENER-

ATE"

function,

frequency

error

and

power (on

the

right

LCD)

cannot

be

accessed.

This

reduces

operation time

and increases

productivity.

See table

1 for

software

de-

fined

selections.

3.3.1

LIQUID

CRYSTAL

DISPLAYS

3.3.1.I

ANALOG

METER

BARS/DIGITAL

DISPLAYS

As

shown

in

fig.

3-2

the

LCD's provide

autoranging

analog

and

digital

displays.

Digital

displays

provide

accuracy

and

autoranging

meter

bars

assist

during

peak-

ing

and

dipping

maintenance

adjustments.

To

provide

efficient

operation

the digital

readouts

of selected modes

TABLE 3-I

FU N

CTIO

N

SWITCH POSITION

ACCEPTABLE

M EA.

SUREMENT

MODE

SUPPRESSED

MEA-

SUREMENT MODE

GEN ERATE

HI

GENERATE

DEVIATION

ALARM

DEV/%AM

DVM
DISTORTION

SI

NAD

BATTERY

VOLTAGE

RF LEVEL

FREO

ERROR

POWER

POWER MON

ITOR

OR

ANALYZER

POWER
MON ITOR

DEVIATION

ALARM

DEV/%AM

DVM
DISTORTION
POWER

FREO

ERROR

BATTERY

VOLTAGE

SINAD

RF

LEVEL

SENS ITIVE
MON ITOR

OR

ANALYZER

SEN SITIVE

MON ITOR

DEVIATION ALARM

DEV/%AM

DVM
DISTORTION

FREO ERROR
BATTERY

VOLTAGE

SI NAD

POWER

RF LEVEL

are

presented

at

the same time as

analog displays.

With

display modes selected for

RF

signal measurements

such

as FM

deviation or

frequency

error, the meter

bars oper-

ate

about a

center

point

and show

symmetrical or non-

symmetrical

deviation

or drifting

about

the center fre-

quency.

In

"%oAM",

the meter

bar

graph

operates

about

a center

point

and

shows

positive

and negative percent-

age

of

amplitude

modulation.

Other disflay mode

ana-

log

meter

bars

(distortion,

power)

have zero

reference

on

the left with

autoranging

meter

bar displays

increasing

to the right.

SINAD

has a

"reverse" meter

bar

graph.

As

SINAD

values

get

larger in

a range

of 0-20

dB the meter

bar

graph

gets

smaller.

The

voltmeter

display,

"DVM",

has left

to right

meter

bars for

all AC

signals

and

positive

DC

signals.

For negative

DC

signals,

the meter bars

move

right

to left with

zero reference

at

the right.

3.3.1.2

SPECIAL

DISPLAY

SELECT

SWITCHES Three

special

membrane

switches

are

provided

to

control the

digital volt

meter, RF

level

and deviation/percent

AM

modes.

The

tr

is used to

select the

FM deviation

or

AM

modulation

positive

or negative peaks.

In

the

"DEVIVoAM"

measurement

mode,

deviation

is auto-

matically

selected if

in FM and

VoAM

is

automatically

selected if

in

AM. The

m

is

used

to

select

the

display

for

either

AC or

DC

voltages

and the

@

provides

the

"RF

LEVEL"

digital readout

in

volts

or dBm. These

keys

will

respond

only when the

associated function

is

active.

\-/

\-/

3-2

\.-,

;

**R*.,*#fum,+. $$$

i\t"'*-

sw$

s w#ru$YSffi

N

s,s."N

{.-\$*\lu$:.i$\:

\-

\/

3.4.0

PROGRAMMING

SEQUENCE

The

unit

has

three

program

keys,E

@

and

Depressing any key will initiate

the

user

programming

states as detailed below. The left and

right

vertical

cur-

sors

for

LCD measurement displays and

the

vertical

cursor

in the modulation

section

will

not

respond

whenever

the unit

is in

a data

entry

state.

When

in any

programming

sequence,

only

numeric

digits

0-9,

ffi:ffii,ffiffi

Press

Press

Numeric

Program

Key

Key

Display

For

example

if

a

frequency

195.050

MHz

is

present

in

the

left LCD display,

3o

RF

monitor

frequency

455.321

MHz can

be entered

into the

non

volatile

memory as:

ffiffiffiffi

:

ffiffiffiffi

, si{lhr {N'..

:

'

'*l$

*S

,, :

#s ffii lisstn ss$ s

'

:-' S ,S W WSIF

....s.. .......$. RR..S S.S:.

::....w..ffii..ffi

K,N:w

Comment

FIGURE

3-2-CLOSE-UP

OF

LCD'S AND

MEMBRANE

KEYBOARD

and

left

and right

cursors

respond.

3.4.1

GENERATOR

AND MONITOR FREQUENCY

The

service

monitor

has

the

capability

of storing

a

separate

frequency for

monitor

and

generate.

To

pro-

gram

the

monitor frequency,

set the

function switch

to

"Pwr

Montt

or

"Sens

Mon"

("Anlzr

Pwr Mon"

or

ttAnlzr

Sens

Mon"

can also be

used

on

the

R-2400).

To

enter

an

RF frequency

press

the

['A

program

key.

L-J

Immediately

the

first

digit on the

left LCD

will

blink

indicating the

point

of entry.

Next enter

the

desired

fre-

quency.

Resolution

is

specified

at

100

Hz

on

frequencies

to 999.9999

MHz

meaning

seven decimal

digits

are

valid

entries.

As

the

7 digits

are entered

using

the

keys

0

through 9, the blinking cursor

moves to

the

right auto-

matically but

may

also be

manually moved using

tft.

ffi

right or

t<

left

cursors. To

clear

the entire

entry,

press

tr,

if

;;B

key is

immediately

depressed

a

second

time,

the original

number

stored

in

memory

is displayed

and

the

programming

sequence

is

terminated.

Pressing

t9

loads

the

frequency

and also

leaves

the

frequency

programming

mode.

5

32r

'l'90.050

4ffi.050

+s

'ioso

+sol'6oo

456i060

Manually Correct

Entry

4ssffio

455.32il'n. Complete

Entry

455.321

NOTE: Shaded

area

indicates

flashing digit.

(point

of

data

entry)
The

monitor RF

frequency

is

now

stored.

The same

se-

quence

is used

to

program

the

generator

RF

frequetrcY,

except

the

function switch

should

be set

to

the

"Gen"

or

"Hi

Gen"

position.

\

i\i\;r11i

,,,,

\\'atttrtttrt**a...ttttt\

\,-

3-3

3.4.1.1

FREQUENCY

COPYING

If

the

desired

gener-

ator frequency

is

to

be

the

same

as the

programmed

monitor

frequency,

it is

not

necess

ary

to

enter the fre-

quency

twice.

The

frequency

copy mode

can be used

as

follows:

Press

Program

Key

tr

tr

Displays

monitor frequency

again.

Generator

frequency is

now

455.3210

NOTE:

Shaded

area indicates

flashing

digit.

(point

of

data

entry)

The

programmed

generator

is

now

the

same

as

the mon-

itor

frequency.

In

a similar

manner,

the monitor fre-

quency

can be

copied from

the

stored

generator

frequency.

3.4.1.2

FREQUENCY

STEPPING

Frequency

stepping

can

be accomplished

by

using

the

E

and

E

key.

First,

enter the frequency

programming

mode

by

press-

ing

the

t3

key.

The flashing

digit

can

now

be decre-

mented

Gnt

the

m

key

or incremented

using the

tr

key.

Even

while

the

digit

is

flashing,

the frequency

indicated

on

the

display is

the

actual

operating fre-

quency.

It

is

not necess

ary

to

press

tr

every time

a

change is

made.

Frequencies

are not

stored

in

non-

volatile

memory,

however,

until

tr

is

pressed.

The

tr

and

K

keys

are

used to

position

the flashing

cursor

as desired.

ln

memory

flashing

digit

100

kHz increment

100

kHz

increment

100

kHz

decrement

flashing

ceases

exit

program

mode

NOTE:

Shaded

area indicates

flashing

digit.

(point

of

data

entry)

3.4.2

DEVIATION

LIMIT

The

deviation

alarm is

set in a similar

manner

to

frequen-

cy.

Start by pressing

E

. The

unit

automatically

switch-

es the

left

LCD

display

to

view

deviation

alarm informa-

tion.

The

limit

may

take values

between

00.0

and 99.9

kHz with

00.0

being

a disable.

As

the

3 digits

are

entered

using

keys

0 through

9,

the blinking

cursor

moves

to

the

right

automatically

but

may

be

manually

moved

using

the

tr

right or

K

left

cursors. To

clear

the

entire

entry,

press

t^"-l

If

the

1""-J

key

is immediately

depressed

a

second

time,

the

original

number

stored

in

memory

is

displayed

and

the

programming

sequence

is

terminated.

The

deviation

alarm

is

provided

to

warn

of FM

deviation

levels

above

this

preset

maximum

and is

active in

any

measurement

mode

provided

the

function

switch is

in

the

"SENS

MON"

or

"PWR

MON" position

for FM

type

carriers.

Press

E

to

load the programmed

deviation

limit.

Once

loaded.,

the left

LCD display

immediately

returns

to

the measurement

mode

selected prior

to

programming.

Display

*ffss

.3zto

(previously

stored

generator

frequency

now

displayed)

'*ffiss

.3210

455.3210

Comment
Displays

monitor

frequency

Set

function

switch to

Gen

or

Hi

Gen

Press

Program

Key

E

tr

tr

tr

G;l

It-iml

f-";

tirj

@

tr

Display

ffis

32to

4ffib

s2to

4

3;;ro

4ssffiro
4ssffiro
4ssffiro
4ssffiro

4ss.4#io

Comment

frequency

reposition

\-/

\-/

3-4

\-/

tion

is

inactive.

For example,

if

a

deviation

limit

of

L

tile memory

as:

\-,

Press

Press

Numeric

Program

Key

Key

055

NOTE:

Shad

entry)

r507

deviation

limit

00.0 Hz is

present,,

a

5.5

KHz

can be

entered into nonvola-

Display

Comment

9.65

VAC

Previous

Measurement

Mode

Selected

o.o KHz

o5ti$ KHz

9.65

VAC

Prior

Selected Mode

indicates

flashing

digit.

(point

of data

display will

show the

prompt

"DPL"

and the

right

side

will

show the

code

last

programmed.

The code may take

on

values

from

000 to 777 octal. Enter the code starting

with

the blinking cursor

position

and

press

Ef

to

load.

If digits

8

or

g

are

pressed

before the

tr

key is de-

pressed,

they

will

be ignored by

the

unit

because they are

invalid entries.

For example, to

program

a

DIGITAL

PRIVATE LINE

code

of

350

octal:

Press Press

Numeric Program

Key Key

3.4.3 TONE

DATA

Once a tone

data

sequence

has

been started by

pressing

@

the

vertical

cursors

on the

left ancl right LCD's

will

not respond

until

the

data

entry sequence is

completed.

Programmecl

sequences

of

prnmptr,

displayecl in

the

upper

portion

of

the

right

LCD,

vary

for modulation

modes

selected

in

the fnultimode

code synthesizer. De-

pressing

@

begins

the sequences

as

follows:

3.4.3.1

PL

The

66PL"

position

is

provided

for PL

tone

outputs.

The left

side

of

the display will

show the

promp

"PL"

and the right

side will

show

the PL

frequency last

programmed.

The PL

tone may

take

on

values

of

50 Hz

io

q9q

.0

Hz.

Enter the

frequenly

starting with

the blink-

ing

cursor

position

and

press

tr

to load.

For

example,

to

program

a PL

code of

150.7

Hz:

Press Press

Numeric

Program

Key Key Display

Comment

Select

"PL"

Modulation

Mode

WZl.6

Hz

Prior

Programmed Code

tsoi#-

uz

t;

tr

NOTE:

Shaded

area

indicates

flashing

digit.

(point

of

data

entry)

3.4,3.2

DPL,IDPL

(inverted

DPL)

The

"DPL" position

is

provided

for

DPL encode

capability.

The left side of the

Display

Comment
Select

"DPL"

Modulation

Code

,ffi70

Prior

Selected Code

!1::::i::::r:::tt::

25

:t

Incorrect

Entry

ifl50

35$r

E

ded

area

indicates

flashing

digit.

(point

of

data

250

350

NOTE: Sha

entry)

Move

Cursor

to First

Digit

To Correct Entry

\.'-

NOTE: All other

sequences

have frequency ranges

be-

tween

50 Hz and 9999 Hz. The maximum number

of

digits

accepted

is four. This means if a frequency

such

as

1999.9

is

entered, the unit

will

automatically

put

a zero

in

the least

significant digit and

you

will get

9999.0

3.4.3.3

A

The

66

A"

position

is

provided

for single tone

outputs. The

left

side of the display

will

show the

prompt

"A

FREQ",

and

the

right side

will

show the

frequency

last

programmed.

Enter the frequency

starting

with

the

blinking

cursor

position.

Press

tr

to

load.

For

example,

to

program

a tone

frequency of 2325 IHz.

Press

Press

Numeric

Program

Key

Key

Display

Comment

2325

Select

66

A"

Modulation

Code

::i:::::;:ilr!:!

r+ill950

Hz

Prior

Selected Tone

,t:

i:: :

:.:

:.::: :

,trr.",r,

NOTE:

Shaded area indicates

flashing digit.

(point

of

data

entry)

NOTE:

While programming

the

deviation

limit,, the

func-

tr

ed area

\-

3-5

3.4.3.4

B

Same

form

as

A

3.4.3.5

A/B

T&V

This

sequence

is

for

standard

Motorola

2-tone_paging.

All

timing

is

preprogrammed

via

soft-

ware.

The

prompt

sequence

is

the

..A

FREe"

followed

immediately

by

the

"B

FREQ".

First

enter

the

A fre-

quency

in

the

blinking

cursor

position.

once

the

frequen-

cy is

loaded,

press

tr

,

the

unit

will

immediately

pro-

vide

the

"B

FREQ"

prompt.

Enter

the

B frequency

and

press

tr

to

load.

For

example,

program

a

paging

sequence

for

Motorola

two-tone

paging

formats

using

frequency

147.2

Hz

and

227.5

Hz

as:

Press

Press

Numeric

Program

Key

Key

Display

Comment

Select

"A/B

T&V"

Old

66'4,"

Frequency

Is

Displayed

Old

568"

Frequency

Is

Displayed

Press

Press

Numeric

Program

Key

Key

Display

l#84.8

Hz

l36.,Hll

Hz

Comment
Select 's

AlB"

Var

Modulation

Code

Old

664,'"

Frequency

Is

Displayed

v

t472

2275

NOTE:

ffis

.6 Hz

l47.fi1lHz

ffi54.4

Hz

iti:!i;;tiit;::i:::

227.$iiHz

1366

1950

025

NOTE:

Sha

entry)

000

u'*74.5

Hz

Old

668"

Frequency

Is

Displayed

:::i:::;:r:i:;:i:::::1,

195.

1t,

Hz

l$i.50

Sec

Old

664,'"

Tone

Duration

0.50

Seconds

Leave

At

ffiiSO

Sec

Old

6cB"

Tone

Duration

0.2,$lilSec

Time

of

data

is

flashing

digit. (point

of

data

entry)

3.4.3.6

A/B

vAR

This

sequence

is

for

oth

er Z-tone paging

codes

for

which

the

software

provides

six

sequential

prompts

before

the programming

is

comprete.

1.

"A

FREQ"

as

above.

2.

"B

FREQ"

as

above.

3.

The

".A

PUR"

(duration)

prompt

allows

the

timing

of the

first paging

tone

to

be

set

in

the

range

of

0.00

to

9.99

seconds.

Enter

the

time

and press

E

,o

load.

4.

The

"B

DUR"

time

is

set

in

the

same

manner.

5.

The

"A

DLY" (delay)

prompt

allows

the

interdigit

time

to

be

set

in

the range

of

0.00

to

9.gg

seconds.

Enter

the

time

and press

E

to load.

6.

The

"B

DLY"

time

is

set

in

the

same

manner

and

is

the

delay

time

between

the

end

of

TONE

B

and the

repeat

of

TONE

A.

3.4.3.7 TONE

REMOTE

This

sequence

is

for

console

to

base

control

using

standard

Motorola

tone

remote

con-

trol.

All

timing

and

level

changes

are preprogrammed

via

software.

The prompt

sequence

is

started

by

pressing

@

.

The

first prompt

displayed

is

'A

FREe"

for

Hi

and

Low

Guard

(normally

2175

Hz)

tone.

Program

the fre-

quency

using

the

numbered

membrane

keys.,

depress

the

tr

key

to

load.

The

"B

FREQ"

prompt

follows

and the

same

key

strokes

to

enter

a function

tone

are

required.

For

example,,

program

a Motorola

tone

remote

control

sequence

of

2175

Hz

guard

tone

and

1950

function

tone

AS:

tr

tr

lffii3O

Sec Old

Interdigit

Time

o.off'liSec

I Enrrr I

t

I

i.ffi.oo

Sec

old

Repeat

Cycle

f;l

Leave

At

Same

t

I

Recycle

Rate

ded

area

indicates

flashing

digit. (point

r

EI

Shaded

area

3-6

\-,

\-

\_-

NOTE:

Shaded area

data entry)

FIGURE

3.3_RF

SECTION

CLOSEUP

NOTE:

There

are two

memory

positions

dedicated to the A

frequency

and B frequency.

If

an operator

changes the A

frequency

or

B frequency

in

any code synthesizer mode,,

that

same frequency

change will

appear in all modes.

3,4.4

CANCELLING ENTRIES

To

cancel the entire entry

when partially

completed

presstrtr.

The

first

"RE-

SET"

always

recalls

the

previously

stored number

and

returns

the cursor

to

the first

digit

tr

tr

recalls

the

old number

and terminates

the

programming

mode.

Any

parameter

entered

completely

during

the earlier

part

of

the sequence

will

retain

its

new value.

Only the

param-

eter currently

being

entered will

revert

to its

previous

state.

3.5.0

RF

SECTION

3.5.1

RF IN/OUT CONNECTOR

A

type

N

connector

is

provided

and allows

the

service

monitor

to

measure the

RF

output of the

radio

under

test

in

the

"Pwr

Mon"

function

(.5

to 125

watts).

The

R-2400 will

display

the spectrum of the signal

when

"Anlzr

Pwr Mon"

is used.

In

the "Gen"

mode, the RF

output

from

the

type N connector

will

be

in the

.

I

uV to

200uV

range.

CAUTION:

Do

not

apply

RF

power

when unit

is on

"OFF"

or

"STANDBY"

mode.

The unit

must

be

powered

for

the

protective

circuitry

to operate.

3.5.2

ANTENNA

A

BNC

connector

is

provided

for

RF

input

in the

"Sens

Mon"

(sensitive

monitor)

mode with

a

l.5uV sensitivity.

The R-2400

will

display

the

spectrum

of the

monitored

signal

when

the

"Anlzr

Sens

Mon"

function is used.

An

RF

signal

in

the

range

of

200uV

to lV

RMS

is

output

from the BNC connector

when in the

"Hi

Gen"

(hi

gen-

erate)

mode. This

connector

is fuse

(P/N

6580377

A6l)

protected

against

inadvertently

keying the

radio

under

test

while

connected

to

the

input. The fuse

is

inside

this

connector and

is

accessible

by

unscrewing

the connector

from the front using

a

hex wrench. If the unit

exhibits

the symptoms of

no

"HI

GEN" output

and

very

poor

off-the-air

receive sensitivity,

this

fuse

may

require

replacement.

3.5.3

STEP

ATTENUATOR

An eight

position

rotary

switch

attenuator

is

provided,

calibrated

in 10

dB steps

for control

of outgoing

RF level

and

for

attenuation

of

received or

monitored

signals.

3.5.4

RF

VERNIER

A

potentiometer

type

vernier control adjusts

the RF

output level when

generating

an

RF

signal.

3.5.5

GEN ON/OFF

A special switch

is

available

to turn off

the

RF output

generated

by the

service

monitor

in the

"GEN"

(gener-

ate)

or

"HI

GEN"

(high generate)

functions.

This is

useful

for

testing

where the

presence

or

absence

of car-

rier

needs

to be

selected

easily, such

as in

20 dB

quieting

checks.

The

generator is

always

reenabled

when the

"FUNCTION

SWITCH"

is moved from a

monitor

func-

tion to a

generate

function

or when the

microphone

Push-to-Talk is ener

gized.

3.5.6

ATTEN

NOT

ZERO

An LED illuminates as

a reminder that

the

RF attenu-

ator control

is not in the

zero

position,

and the

receiver

is

not at

maximum

sensitivity.

Press

Press

Numeric

Program

Key Key

1950

Display

Comment
Select

"Tone

Remote"

Modulation

Code

iiilfi:l75

Hz

Old

High

Guard Tone

Leave

At 217 5

Hz

:i:;iii:tititii!;ii

,,:il,:,ll|750

Hz

Old

Function

Tone

195,0,H2

indicates flashing cursor.

(point

of

fr;

t""J

E

\.-

3-7

iil*SN

j;r*::'i:i::i:;::i:*i'|rr*i::r:::;i

ji:ii:ri::..

3.6.0

OSCIIOSCOPE/SPECTRUM

ANALYZER/MODUTATION

SCOPE

SECTION

3.6.6

VERT

A

four

position

rotary

switch

controls

the vertical

dis-

play.

Oscilloscope

operation

uses values

marked

to

the

right

of

the

switch

indicating

volts

per

division.

Values

marked

to

the left

of the

switch

are

used

when

modula-

tion

is

displayed

on

the

oscilloscope.

The

right

bezel

of

the

oscilloscope

has

a numerical

scale

corresponding

to

values

of

.25

kHz, 2.5

kHz

and 25

kHz

per

division.

This

allows

deviation

measurements

to

be

made

even

when

the

service

monitor

LCD

display

is

not

selected

to

"DEV/VIAM"

and

gives

the technician

the

ability to

detect non-symmetric

modulation.

This

switch

is

dis-

abled when

the

R-2400

spectrum

analyzer

is

being

used.

3.6.7

VERT

VERNIER

The vertical

vernier

potentiometer

controls

the vertical

inputs

to the

oscilloscope.

The

calibrated

position

is

fully

clockwise.

NOTE:

The vertical

vernier

potentiometer

is

also func-

tional when

the

R-2400

spectrum

analyzer

mode

is

being

used.

It

is

important

to

have

this

control

in

the

"Cal"

posi-

tion

to

ensure

true

l0dB/div

vertical

accuracy.

FIGURE

3.s-CLOSEUP

OF

SCOPE

TRACE

3.6.8 POSITION

The

stacked

concentric

potentiometers

control

the

ver-

tical

and horizontal

positions

of

the

scope

trace.

For

R-2400

spectrum

analyzer

operation,

these

con-

trols

are

also

used

to

center

the

observed

spectrum.

when

entering

the

spectrum

analyzer

mode,

use

the

"Vert

Position"

control

(innermost

control)

to

set the

base

of

the

noise

floor

at the

bottom

graticule.

The

Horiz

Position

control

is

adjusted

by first

programm-

ing

for

an RF

frequency

of 000.0000

Mhz

(dc

reference),

then

with

the

dispersion

control

set for

lMhz/div,

use

the Horiz

Position

control

(outermost

potentiometer)

to

center

the

observed

spectrum

display

horizontally

around

the

center

(sth)

vertical

graticule.

'

*i,$,i,t..i.rf,*i'.

,l:::,,,]t't,t,:,lll

-'.,,'

$r1ig\

I"i'i til

i-.+\,

i

$'

$;

j

J.

5is..riis;$;r+'l.

i

j,$'$

FIGURE

3-4-CLOSEUP

OF

SCOPE

CONTROLS

3.6.1

INTENSITY

The

intensity

control

varies

the

brightness

of the scope

trace.

3.6.2

FOCUS

The

focus

control

varies

the

sharpness

of

the

scope trace.

3.6.3

HORIZ

This

seven

position

rotary

switch

selects

the

horizontal

sweep

rate

or the

external

hori

zontal

sweep

input

when

the

oscilloscope

function

is

being

used.

On the R-2400,

this

same

control

is

used

to

select

the

dispersions

of

l,

.1,

and

.01 MHz/div

when

the

spectrum

analyzer func-

tion

is

selected

with

the

function

switch.

The

sweep rate

is

automatically

fixed

when

in

the

spectrum

analyzer

mode.

3.6.4

HORIZ

VERNIER

This

potentiometer

controls

the horizontal

sweep

rate

when

the

oscilloscope

functions

is

being

used.

The

calibrated

position

is

the fully

clockwise

position.

This

control is

disabled

when

the

R-2400

spectrum

analyzer

function

is

being

used.

3.6.5

SOURCE

The

source

control

is

a

three position

rotary

switch which

selects

the

source

for

the

scope

vertical

input. "MOD"

(modulation)

will

display

tho

outgoing

RF

modulation

signal

or

the recovered

modulation

signal.

The

"EXT

AC"

(external

AC) position

selects

AC

coupled

external

input

frorn

the

BNC

connector.

The "EXTDC"

(exter-

nal

DC)

position

selects

the

DC

coupled

external

input

from

the

same

BNC

connector.

3-8

\-

\--

W$#l$

:

:::::::

',:::']::

,

:,

t,,t

i

',.r

3.6.9 TRIG

MODE

The

triggering

mode

is

a three

position

rotary switch and

selects

the

scope

triggering

mode

or can turn the scope

off

to save power. "AUTO"

(automatic)

provides a con-

tinuous

sweep

with

no vertical

input.

The

"NORM"

(normal)

position

requires

an

external

vertical

input to

trigger

a

sweep.

The

"SCOPE

OFF"

position

turns

off

the

scope.

This

will

extend battery

operating time.

3.6.10

TRIG

LEVEL

The

triggering

level potentiometer

adjusts the scope trig-

ger

voltage.

3.6.11 VERT/SINAD/DIST

DVM

Multi-purpose

input. Also

located

in the

oscilloscope

section is

a BNC

connector

to connect

signals

to the

unit

for

the following

functions:

1. External vertical

inputs

for

oscilloscope

operation.

Sensitivity

ranges

from

10

mV/div

to

10

V/div.

2.

SINAD meter

input

range

is .5

V to

10 VRMS.

3. Distortion

meter

input

range

is

.5 V to

10 VRMS.

4.

Digital

Volt

Meter

input.

Accepts AC and DC

volt-

ages

and

provides

3 digit

autoranging scales

of

1,10,100

and

300 volts

full

scale.

NOTE: An

extreme

overload

condition

to the oscilloscope

could result

in

activating

input protection

circuitry

which

can induce

reading

errors

on

all measurement

modes

using

the

multipurpose

input

connector. This

will only

occur with

the

oscilloscope

vertical

input

sensitivity

set

much

too sensitive

for

thesignal

being

measured,

and the

viewed

oscilloscope

signal is

obviously

overloading and

deflecting

far

off-screen.

3.7.0

MONITOR

SECTION

W,W

.$.*$

,$,,','

:,,,

9.6'ffiig.sft

ffi'$g.'t'r*$

$ffi9.$

3.7.1

VOLUME/SQUELCH

The volume

control adjusts

the speaker

output

level.

The

squelch control adjusts the

threshhold

level.

Full

counter

clockwise disables the

sq uelch .

NOTE:

Monitor

sensitivity

is greatly

decreased as the

squelch

control

is

increased

clockwise beyond the no-

squelch

squelch

point

3.].2

IMAGE

H.T/LO

In

either

monitor mode

this

toggle switch selects

the

fre-

quency

of

the local oscillator

injection

above or below

the

programmed

monitor frequency

to

remove image in-

terference.

The normal

position

is

"LO".

When

a

signal

unsquelches

the

receiver, flipping

the switch to

"HIGH"

will

verify

that the signal

being monitored

is

at the

pro-

grammed

frequency

and

not

a

receiver

mixing

image.

This

switch

is

also used

to identify

images

when

the

R-2400

spectrum analyzer

is

being used.

3.7

.3

BANDWIDTH WIDE,/NARROW

In either

"PWR

MON"

or

"SENS

MON"

functions this

switch selects

the

IF

bandwidth.

Narrow

band is

-+-

10

kHz modulation

acceptance used

for

most

2-way

radio

communication

systems and

wide

band

is

!75

kHz

mod-

ulation acceptance

used

for commercial

FM broadcast

monitoring

or

locating

a signal

when the exact

frequency

is not known.

3.7.4

DEMOD

OUT

The demod

out BNC

connector

provides

receiver audio

output.

Output signals can be used

for

transmitter

distor-

tion measurements

or for

external

frequency counters.

3.8.0

MODULATION

SECTION

3.8.1 GENERAL
The multimode

code synthesizer

contains

all controls

used to

generate

an

audio

signal.

Starting

with a sinusoid-

al one

kilohertz tone oscillator,

the section

also includes

capability

to modulate

a carrier

with PL,DPL,IDPL,

single tone or

two tone

paging

type

signalling. A four

pin

microphone

connector is available

for voice modulation

and a

BNC

connector is available for input

from

an

external signal

generator.

An important feature

is

the

capability to

do simultaneous

modulation. It is

possible

to combine voice,

&Dy single

code available

from the

code synthesizer

and a 1

kHz

test tone in

order

to

provide

composite

signals for complete testing.

3.8.2 I KHz LEVEL

An internal

1 kHz tone modulation

level control

is pro-

vided.

When

in the full counterclockwise

position

the 1

kHz source

is disabled. Modulation levels

can be

viewed

by

selecting

"DevlVoAM"

on the

left

LCD and operates

in

any selected function

switch

position.

3.8.3

EXT

MOD TN

A BNC

connector

is

provided

for

external

modulation

signal

inputs

\_,

FIGURE

3.6-CLOSEUP

OF MONITOR

SECTION

3-9

3.8.4

MIC

CONNECTOR

A

4-pin

connector

is

provided

with

microphone

bias and

PTT

capability.

Depressing

the

PTT

button

on the micro-

phone

is

the

same

as

changing

the

FUNCTION

switch.

Function

With

PTT

Open

HI

GEN
GEN
PWR

MON

SENS

MON

Function

With PTT

Depressed

HI

GEN
GEN
GEN

HI

GEN

The

mic

input

contains

a deviation

limiter

to limit

voice

modulation

peaks

as in

a

mobile

radio.

3.8.5 EXT

LEVEL

Control

of the

microphone

and other

external

signal

generators

modulation

level

is provided.

When in the

full

counter

clockwise position,

the

source

is disabled. Mod-

ulation levels

are viewed

by

selecting

the

"DEVl%oAM"

display

on

the left

LCD

and

can also

be viewed on the

modulation

scope.

3.8.6

CODE.SYNTHESIZER

LEVEL

The

potentiometer

controls

the

internal

code

synthesizer

modulation

level.

When

in

the

full

counterclockwise

position,

a minimum

modulation

level

is reached.

ON/

OFF control

is provided

by

the

modulation

switch.

Mod-

ulation

levels

are viewed

by

selecting

the

"DEVl%oAl/'''

display

on the

left

LCD

and

can

be viewed

on the mod-

ulation

scope.

Also

the code

synthesizer

operates inde-

pendently

of

the

function

switch

setting.

3.8.7

MODULATION

SWITCH

A

3

position

toggle

switch

controls

the

code synthesizer

modulation

source.

1 .

Cont.-Allows

continuous

modulation (recycle)

sig-

nal

outputs.

Sequential

tone

patterns

will

be repeated

as long

as

this

switch

is

enabled.

2.

oFF-Turns

off

the

modulation

signal.

If in

the

DPL

or

IDPL

mode,

returning

the

switch

to the

oFF

from

continuous

or

burst

produces

a I34.4

Hz

stop tone

burst

for

I20

ms.

3. Burst-For

PL,

tone

A

and

tone

B modes

the output

is

present

for

as long

as the

switch

is

held in the burst

position.

For

A/B

Var,

A/B

T&V,

and tone remote,

putting

the

switch

in the

Burst position

causes one

cycle

to

be

output.

For

tone

remote,

the last A tone is

output

for

as long

as the

switch

is

held in

the burst

position

to

simulate

low

guard

tone.

In

the

DPL

or IDPL

modulation

mode

the burst

position

causes

continuous

cycling

of

the code as long

as

the

switch

is

depressed.

When

the

switch is released

the

code

completes

the

cycle

it

was

in

and a 120 ms

burst

of

stop

tone

(134.4

Hz)

is

generated.

3.8"8 CODE SYNTHESIZER

MODE

SELECTION

The

code synthesizer

provides

capability

to select

any

of

the formats

listed

below. Each of 10

positions

has

a

corresponding

LED to indicate which

mode

is selected.

Only when

the modulation

switch is

toggled

away

from

the off

position

will

the outputs be generated

and dis-

played

in the

right LCD. The modulation

switch

must be

active for

setting

deviation

with

the

code synthesizer

level

control. Positioning of

the selected mode is

performed

by the

tr

vertical

display

cursor.

As with

all

cursor controls in the unit,, or audible feedback tone

will verify

acceptance of a switch activation.

1. PL

COUNT-Code synthesizer outputs

pro-

grammed

PRIVATE LINE frequency, displays

counted frequency of incoming PL tones if in either

monitor function.

2. Pl-Programrned

PRIVATE LINE, frequencies to

1

kHz

3. DPl-Programmed

DIGITAL

PRIVATE

LINE

codes are

output.

'ffi,W,w,;:taw,

W

&t

u,',',W;fu,

,'."'

:

:,

'

,,

t:

::

,:

't::

t

l

,: t:,l,ii::.

WY:'*,,'4W

;,,,;t.

:,,:t

::::t::

::::i::::::,:l::

ffi

,t{3,.#i;*,r,ii

ii,,,,":,.',',r",

trffi#ffiwLW*#*4

#;r*;d.w

ffi't#.,fu,

::,,w,t',''

",

:',.,,',,.';ffi

.,,|:,fi$,,

::ffi:ffigr,,,:,fu,911

FIGURE

3.7-CLOSEUP

OF MODULATION

SECTION

W,

3-10

4. IDPL:Inverted

output

of

programmed

DIGITAL

PRIVATE,

LINE

code

is selected

for

output.

A-Tone

A

is selected

for

outPut.

B-Tone

B is

selected

for

outPut.

A/B

T&V-Indicates

that

AIB

tone

and

voice

pag-

ing sequence

has

been

selected

for

output.

A/B

VAR-Indicates

that

A/B

sequence

with

vari-

able

programmed

values

for

duration

and

delays

has

been

selected

for output.

TN

REM-Indicates

access

sequence

for

Motorola

tone

remote

control

has

been

selected.

OPTION-This

mode

is reserved

for

future

ex-

pansion.

Without

an

option

card

installed,

this

mode

cannot

be

selected.

SEE

PARAGRAPH

3.10.0

3.9.0

REAR

PANEL

CONTROLS

3.9.1

BATTERY/EXT

DC

If

turned

oo,

the

service

monitor

will

automatically

switch

to

battery

power

if no

AC source

is

available

and

the

unit

is equipped

with

the

battery

option.

When

the

switch

is in

"EXT

DC"

allows

the

unit

to

be

powered

by

an external

voltage

Source

such

aS a

car

battery.

3.9.2

DC

IN

A

4-pin

power

connector

to connect

the

unit

to

a

DC

prime

power source.

A connector

is

provided.

3.9.3

AC

1.lA

AC

line

fuseholder.

(spare

fuse

provided

65-00042092)

3.9.4

DC

8A

DC

prime

power

source

fuseholder.

(spare fuse

provided

6s-80397

A22)

5.

6.

t.

8.

9.

10.

FIGURE

3-8-REARVIEW

3-11

\-

3.IO.O

TWO.WAY

SERVICE

OPTION

OPERATING

SYSTEM

Being

the

first

in

a

series,

the

Two-way

Service

option

card

is

structured

with

a

unique

operating

system

which

uses

a list

of

numeric

commands

to

accommodate

the

nu-

merous

signalling

variables

found

in

the

land

mobile

in-

dustry

signalling

standards.

This

operating

system

requires

the

operator

to

first

select

the

OPTION

position

within

the

code

synthesizer

section

of

the

R-

2200.

The

follow-

ing

paragraphs

detail

how

the

operator

accesses

these

unique

functions.

The

functions

of

the

R-2200

provided

by

rhe

Two-Way

Service

option,

RTL-416lA,

are

accessed

via

a special

set

of

Function

codes.

Each

mode

of

operation

has

a unique

code

which

must

be

entered

by

the

operator.

These

Func-

tion

Codes

are

listed

below.

OPTION

CODE

FUNCTION

I

I

DPL

Decode

I

2

Inverred

DpL

Decode

2

I

DTMF

Decode

3

I

DTMF

Batch

Encode

Timing

_

Tone

Duration

and

Delay

(Default

-

100

ms

on,

50

ms

offl)

3

2

PL

Frequency

Select

for

simul

pL

and

DTMF

Encode

3

3

DTMF

Manual

Encode

without

pL

3

4

DTMF

Barch

Encode

without

pL

3

5

DTMF

Manual

Encode

with

pL

3

6

DTMF

Batch

Encode

with

pL

3.IO.I

DPL/IDPL

DECODE

ThtJ

sequence

is

for

any

DpL

(DIGITAL

PRIVATE

LINE)

or

Inverted

DPL

(IDPL)

decoding.

The

DpL

or

IDPL

modes

o_f

operation

are

accessed

by

first

selecting

the

oPTIoN

position

of

the

code

synthisizer.

3.IO.I.I

DPL

DECODE-ACCESS

CODE

r

I

Press

Press

Numeric

Program

Key

Key

Display

Comment
Current

state

of

NV

memory.

Ready

to

decode

DPL

flashing

digit.

(point

of

3.10.2

DTMF

DECODE

This

sequence

allows

decoding

of

the

standard

l6

DTMF

tone pairs.

Decoding

of

DTMF

tone

pairs

is

functional

from

3

different

sources.

The

decoder

will

function

oFF-THE

AIR,

with

a

direct

radio

connection

or

from

the

External

Modulation

In

BNC

connector

(EXT

MoD),

locared

in

the

Modulation

section

of

the

R-2

z}}front

panel.

The

Fun.-

\-/

tion

Switch

must

be in

the

"Gen"

or

"Hi

Gen" position

to

decode

DTMF

tones

via

the

External

Modulation

BNC

connector.

DTMF

decoding

modes

of

operation

include

a

BATCH

DECODE

mode.

when

a series

of

DTMF

digits

must

be

decoded,

a maximum

of 16

digits

can

be

decoded

and

stored

in

memory.

3.10.2.I

DTMF

BATCH

DECODE_ACCESS

CODE

2

I

Press

Press

Numeric

Program

Key

Key

Display

Comment

dFd

Current

state

of

NV

memory.

Place

MODULATION

SWITCH

in

"CONT"

and

the

unit

is

ready

to

decode

DTMF

Decode

DTMF

while

Modulation

Switch

is

in

"CONT"

position.

When

finished

decoding

\

DTMF

tone

pairs,

place

\-/

Modulation

Switch

in

"OFF"

position.

l1

dPL

indicates

NOTE:

Shaded

area

data

entry)

3.I0.

I.2

IDPL

DECODE_ACCESS

CODE

I2

Press

Press

Numeric

Program

Key

Key

Display

i:::ii:iri;ii;l

:lti,ff

I

tr

eda

t2

NOTE:

Shad

data

entry)

dPL

rea

indicates

Comment

Current

state

of NV

memory.

Ready

to

decode

IDPL

flashing

digit.

(point

of

BO'

NOTE:

Shaded

area

data

entry)

dFd

123

Using

right

cursor,

review

code

stored

in

NV

memory.

=1234

"dFd"

has

now

scrolled

off

the

LCD

display.

=12345

Scrolling

through

memory

1234567

A

total

of

7

digits

maximum

can

be

displayed

at

a

single

time.

234567:

End

of

decoded

sequence

is

now

reached.

1234567

Backspace

using

left

cursor

or press

Reset.

dFd

Place

MODULATION

SWITCH

in

CONT

to

clear

display

and

ready

for

another

decoding

\ r

sequence.

\-/

indicates

flashing

digit.

(point

of

tr

tr

tr
tr

tr

3-12

\-

33

4

rlili:i;ir:i

iriw

dFE

dFE

4

3.10.3

DTMF ENCODING

The

Two-Way

Service

Option

includes 4 different and

distinct methods of encoding

DTMF signalling tone

pairs.

As mentioned

previously,

the option card

is capable of

encoding DTMF,

1)

Manual with

PL

,

2) Manual

without

PL, 3) Batch with PL

and

4)

Batch

without PL. Begin

by

selecting

the OPTION

position

of

the

code synthesizer.

3.10.3.1

DTMF REAL TIME ENCODING_ACCESS

CODE

3 3

Press

Press

Numeric

Program

Key

Key

Display

Comment

If modulation

switch is

placed

in

"BURST"

the dis-

played

digit

is sent

per

the default

timing

(100

ms

Tone

ON,

50

ms Tone Offl or the

operator

defined

timing

parameters

(OPTION

CODE

3 1).

NOTE:

Shaded

area

indicates

flashing digit.

(point

of

data entry)

3.10.3.2

DTMF

BATCH

ENCODER NO

PL_ACCESS

CODE 3

4

Press

Press

Numeric

Program

Key

Key

Display Comment

$

I Current

state

of

NV

memory

34

dFE

123 LCD

display

shows

first

three

DTMF

characters

stored

in

NV memory

OFEliflZ:

Enter

EDIT

mode

Current

state

of

NV

memory

Now in

Real

Time

DTMF

Encode

Mode

Place MOD

switch

in

CONT

and

set

Deviation

to 3.3

KHz

Now

generating DTMF

Key 2

Place Mod

switch

in

OFF

Place Mod

switch

in

BURST.

DTMF

Key

2

is

sent

with

a tone

on

100

mS

(default)

or

per

timing

instructions

entered

in User

Defined

DTMF Encode

mode.

ie.

Access Code

3

I

Flashing underscore
Ready to enter

special

character

DTMF

key.

Ready to send

(3

#"

DTMF

key

either

continuously

or

for 100

mS.

(ie.

use

MOD

switch)

ft-;l

t"'"J

tr

tr

tr
tr

tr

ffit

t"'"J

E

ft-;

t"*J

tr

dFE lffi

dFE

l2#i

:

123.'#i

Moving

flashing

cursor to

review code

stored in

NV memory

"dFE"

has

now scrolled

off the

LCD

display.

dFE 2

dFE

-

dFE P

1234sji,

=12345-

Reached

end of

stored

code

in NV

memory

and can

enter

new data

or

backspace

usingK

and edit.

=12345

-

Ready to enter

special

DTMF character

=12345F

Have

loaded

66*"

DTMF

key into

NV

memory.

=12345F

=

Ready to

terminate

DTMF EDIT

mode.

dFE

123 Stored

DTMF code

is

now

"

12345F"

ffit

t"'"J

EI

NoTE:

If modulation switch is

placed

in "CoNT" tone

be

Place MODULATIoN

sent

continuous

switch in coNT'

Entire

If modulation switch is

placed

in

"OFF" tone

will

sequence of 12345*

is

be sent when digit key is

pressed

or when ENTER

sent' or BURST

position

key

is

pressed.

ENTER key is used

for special

tosenddigitsoneatatime'

chiractlrtones

of

..*,,

and..#,'.

NOTE:

Shaded area indicates flashing digit.

(point

of

data entry)

I-,

3- 13

035

015

NOTE:

l;:fl:.

l5

sec

NorE:

user

can

review

NV

memory

when

out

of

edit mode

by

using

cursors.

No

digits

are

flashing

and

the

end

;:il,

mory

is

indicated

by

((-'',

end

of

data

3.10.3.3

USER

DEFINED

DTMF

ENCODER

TIMING

-

ACCESS

CODE

3 I

Press

Press

Numeric

Program

Key

Key

Display

Comment

.il

,

4

Current

state

of NV

memory

l:i:ii:l:il::i:i:::i

ilii

j.05

sec

Old

Tone

On time

displayed.

Set duration

time

to

350

ms

(next

step)

Old

Tone

Off Time

Set interdigital

time

to

150

ms

(next

step)

Ready

to

select

DTMF

Encode

mode

NOTE:

Preset

the

required

PL

code

(para.

3. 10.3.4)

before

entering

the

Simultaneous

PL

& DTMF

batch

encoding

mode.

PL

tones

will

automatically

be superimposed

on

the

DTMF

with

a

preset

deviation

equal

to 25vo

of

the DTMF

deviation

level.

Example:

DTMF

Deviation

level

-

3.2

KHz

therefore

PL

Deviation

level

_

800

Hz.

NOTE:

To

access

special

character

DTMF

keys perform

the

following:

SPECIAL

OPERATOR

ENTRY

CHARACTER

PROCEDURE

*

(shown

as

'6

F'

'

on

LCD)

#

(shown

as

6 6

P'

'

on

LCD)

NOTE:

To

clear

NV

memory

to

en

ile

in

edit

mod

press

NorE:

Should

the R-2200,

wirh

RTL4l6lA

Signalling

option

installed,

appear

to

operate

abnormally

(for

ex-

n

ample

-

the

unit

may

not

operate

in

the

batch

encode

mode,

when

in

the

option

position),

it

may

be the result

of

invalid

data

being

stored

in

the non-volatile

memory.

A

mode

of operation

has

been included

in

the RTL4l6lA

software

that will

reset

the memory

to a

default

status

should

this

occur.

This

mode

is

accessed

by

entering

the

option

code 9 2.

The

memory

reset

function

should

be

performed

before

proceeding

with

any

other

trouble-

shooting

procedure.

NOTE:

The

RPX-4309A

kit is

available

on

a field retrofit

basis for

any R-2200

or R-2

400

already

shipped

withour

the two-way

service

option

installed.

This

kit

contains

the

two-way

service

option

board

and

all necessary

in-

structions

to

properly

install

it.

G;

tr-"J

f-;t
t""j

F""f-l

Pg

tr

ffit

t'*J

ft;

t""J

dwh

A

tr
tr

tr

tr

tr
tr

e

tr
tr
tr
tr

tr

tr

C

D

\.r/

\-/

Normal

DTMF

Batch

Encode

procedure

can

be

fol-

lowed

from

this point.

Timing

parameters

en-

tered

in

this

mod-e

will

be

.urii.o

over

into

all

DTMF

encoding

modes

of

operation.

3.I0.3

.4

PL

FREQUENCY

SELECT

-

ACCESS

CODE

32

Press

Press

Numeric

Program

Key

Key

Display

Comment

ffi

I

Current

state

of NV

memory

t''..$

23.6

Hz

;l::::l:i::ll:ii:ll!

a

:,,:

:,lll!

{

.;::..:j!:!t

J

'|t

Prior

Programmed

Code

l

507

Ready

to select

desired

DTMF

Encode

Option

Code

3.10.3.5

DTMF

BATCH

ENCODE

WITH

PL

-

ACCESS

CODE

3

6

Press

Press

Numeric

Program

Key

Key

Display

tr
tr

:;,!:i::::::,::;i;::i:

lils

I

dFE

t23

Comment
Current

state

of

NV

memory

First

three

DTMF

characters

are

displayed

3-14

\-,

SECTION4

OPERATING

INSTRUCTIONS

4.I.0 OPERATION

The

operator may use the

LCD's and

CRT

display

to

become

familiar

with the

functions the Communication

Service

Monitor

is capable

of

performing.

As

a

function

is

selected,

its

parameters are displayed

on

the

LCD's.

4.2.0

POWER UP

4.2.I

PARAMETER

MEMORY

The

unit

contains

nonvolatile

memory

that

stores

the

most

recently

programmed

values

for the

following

pa-

rameters;

1.

Operating

Frequency

2. DPL Code

3.

PL Frequency

4.

Tone A and

B

a)

Frequency

b) Duration

c)

Delay

5. Deviation

Alarm Limit

Also

included in memory are

the most

recent

state

of the

following

membrane keys;

1.

DEV

+

2.

RF

V/dBm

3.

Display select arrows

(left

and

right)

4. DVM AC/DC

5. Code Synthesizer

Modulation

select

arrow

(vertical)

WARNING

Lithium

Battery

The

processor module

within

this

system

utilizes

a

lithium

battery as a memory

keep-alive

voltage

source.

Do

not

mutilate

or disassemble

the

battery

cell.

The

lithium

metal is

a

very

active

material

that

burns

in the

presence of

water or

high humidity.

Do

not

put

the

battery

in

fire, attempt

to

charge,

heat

above

100'C,

of

solder

directly

to

the cell.

Do not

overdischarge

the

cell

to

a reverse

voltage

greater

than

3

volts.

The

battery

may

burst

and

burn

or

release hazardous

materials.

CAUTION

Lithium

Battery

Lithium

batteries

are classified as

hazardous

materials

and

must be disposed

of accordingly.

Do

not

dispose

of

the

battery by

placing

it

in with the

everyday

trash.

Consult

state

and

local

codes

for the appropriate

disposal

procedure.

Motorola

will dispose of

the

battery

if the

expended

battery

is returned in the replacement

battery

container

and

by the same method

that the

new

battery

came

to

you,

send to:

Motorola

Inc.,

Return

Goods

Department,

13L3

East

Algonquin Road,

Schaumburg,

Ill.

60196.

\.-

\,

4.2.2

DEFAULT

PARAMETERS

The unit

will

initialize

to

the

last active

state

unless

the

battery

(P/N

60-83294N03)

which

powers

the

non-

volatile

memory

is

faulty

or

has

low output

level

due

to

age

or defect.

(See

the

maintenance

manual

for battery

replacement.)

Should

this

occur

the

initialized

param-

eter

values

will be;

Operating

Frequency-1.0O

MHz

DPL Code{00

PL

Frequency-l0O

Hz

Tone A

a)

Frequency-l

kHz

b)

Duration-0.5

Sec

c)

Delay{.O

Sec

Tone B

a)

Frequency-l.5

kHz

b) Duration-O.5

Sec

c)

Delay{.0

Sec

Deviation

Alarm

Limit{.0

kHz

(alarm

off)

DEV

I

initial

state

is

+

RF V/dBm

initial state

is

Volts

Display Select

(left)

initial

state

is

SINAD

Display

Select

(right)

initial

state

is

RF

LVL

or RF

PWR

DVM

AC/DC

initial state

is

AC

Code

Synthesizer

Modulation

select

initial

state

is TN

REM

NOTE:

The

Lithium

Battery

used

for

non-volatile

memory

is included

in

every

unit and

is independent

of

the optional

RTP-402IA

Battery

Pack Option.

All

functions that

are controlled

by toggle

switches,

fo-

tary switches

or

potentiometers are initialized

according

to

the current

positions

of the

switches.

4.3.0 GENERATE

OPERATION

The

Service

Monitor

generates

RF

frequencies

for

FM,

AM, and CW

transmissions

covering

a

range

of

200

kHz

to

1.

GHz.

To

generate

a signal

the

"FUNCTION"

switch

is

placed

in the

"GEN"

or

"HI GEN"

position.

NOTE:

An RF

protection circuit to

protect

against

damage

due to

inadvertent application

of

RF

power

to

the unit

is

provided.

4.3.I OUTPUT

LEVEL

Output

in

the

"GEN"

function

is

available

at

the

"RF

IN/OUT" connector.

Voltage

output

range

is .1 uV

to

200 uV

into

50

ohms

for direct

connection

to

the antenna

input of the

equipment

under

service.

Output

in the "HI

GEN"

function

is available

at the

antenna

BNC connec-

tor

of the

unit.

Voltage

output

range

is

200 uV

to

1

VRMS.

This is sufficient

for transmission

through

an

antenna connected

to

the

antenna

connector.

\-,

4-r

4.3.2

MODE SELECT

The

modulation

mode is

selected

using

the "MODE"

switch.

AM, FM,

and

Cw

(no

modulation)

are

available.

4.3.3

SIMULTANEOUS

GENERATE

AND

MEASURE.

MENT

OPERATION

The following

test

setups

and

LCD

displays

are examples

of

simultaneous

generate

and

measurement

operation.

1.

Connect

the

RF In/Out

to

the

mobile radio antenna

connector

and the

multipurpose

measurement input

to

the

receiver

audio

output.

2.

Set the

function

switch

to GEN

and

tr

to

Dev.

Adjust

the

1

KHz

level

for

3.0 KHz

deviation

and

then move

the

cursor

tr

to

SINAD.

Adjust the

RF

venier

for

12 dB

SINAD indication.

Read

the receiver

sensitivity

in microvolts

or dBm.

Increase

the RF

generator

level

to 100 uV.

8. Move the

cursor

tr

to

Dist.

Read the

receiver

distortion

in

Vo.

g.

Move the

cursor

tr

to

DVM.

L0.

Select

AC or DC volts

using

m

switch. If oscillo-

scope

display

is desired

select

the

proper

external

vertical

trigger

for oscilloscope

display.

1,1..

Apply

test

signals

from

the receiver

audio stages to

the

unit's

VERT/SINAD/DIST/DVM

input. The

same

x1 test probe

used

for

SINAD

and Distortion

may be

used.

12. The voltage

can

be read

on the

left

LCD display or

viewed

on

the oscilloscope.

FIGURE 4.I-TEST

SET.UP FOR FM

RECEIVER

SENSITIVITY

3.

Enter the frequency

by

pressing

trtrtrtrtrtr88tr

trtrtrtrtrtrtrtrtr

4.3,4

TEST

PAGER

DECODE

AND

ALERT FUNCTION

The

internal

programmable

code

synthesizer generates

PRIVATE

LINE

(PL)

AND

DIGITAL

PRIVATE

LINE

(DPL)

squelch

codes, two-tone

sequential

paging

and

base

station

tone remote

control

signal

continuously

or

in

burst

cycles

as

an internal

modulation

source.

In

addition

to the

code

synthesizer,

modulation

is simul-

taneously

available

from

an independently

adjustable

internal

1

KHz tone

generator

as

well

as

from external

input

sources.

1.

Connect

the

pager

test fixture

to

the

RF

In/Out Con-

nector.

2.

Set

the FUNCTION

switch to

GEN and enter the

frequency from

key board.

Select the

paging

format.

Enter the

pager

tone code

frequencies.

Start by

pressing

@

Activate

by

placing

the

Code Synthesizer

switch

in

the

burst

(momentary)

or

continuous

position

and adjust

Code

Synth

Lvl for 3.3

KHz

deviation.

A functional

pager

will

respond.

FIGURE 4-2-TEST

SET.UP

FOR

PAGER

AND ALERT

FUNCTIONS

NOTE: A/B T&V

has

preprogrammed

timing sequences

for

two-tone sequential

tone

and

voice

paging.

A/B VAR

is user

programmable.

Variable timing

sequences

are

used

for

other

signalling

systems.

\r/

\-/

4.

3.

4.

5.

6.

7.

TME

@ffi8

RF

IN/OUT

VETVSINAD

DiSVDVM

4-2

\../

\-

\-

4.4.0 MONITOR

OPERATION

4.4.I

SENS MON

The

Service

Monitor

is capable

of monitoring frequen-

cies of 3 MHz

to

1

GHz^with 1.5 uV

sensitivity.'

The

monitor

may be used

to

1

MHz

with

reduced

sensitivity.

1.

Connect the

BNC

antenna

(TEKA

-24A)

to the

antenna connector located in the RF section.

2. Set the FUNCTION switch ro

SENS

MON.

3. Select the modulation type using the

MODE

switch.

4. Enter

the

frequency from

the keyboard

trtrtrtrtrtrtrtrtr

5. Adjust the squelch and

volume.

6.

Move the left cursor

tr

to

Devlo/oAM.

Move

the

right

cursor

tr

to

frequency

error.

Listen

to

re-

ceived

audio

from

the

internal

speaker

and

view on

the oscilloscope.

NOTE: The

antenna input

is fuse

protected

against

in-

advertent keyup into

the antenna input. Consult

the

maintenance

portion

of the

manual for fuse

replacement.

In

either

PWR

MON

or

SENS

MON

functions the

BANDWIDTH WIDE/NARROW

switch selects

the

IF

bandwidth.

Narrow

band is

+

15 KHz modulation

acceptance

used for most

2-way radio communication

systems

and

wide

band

is

+75

KHz

modulation

accept-

ance used for

commercial

FM broadcast monitoring.

FIGURE

4.3_TEST

SET-UP

FOR

OFF-THE-AIR

MONITORING

CAUTION:

Care

should

be taken

to not

exceed

the .5

watt

max.

input

level

of

the

"Antenna Input".

4.4.I.I

SENS MON

WITH

SPECTRUM ANALYZER

(R-2400

only)

l. Connect

the BNC

antenna

to

the

"Antenna"

connec-

tor

located

in

the RF

section.

2.

Set

the

Function

switch

to

"Anlzr

Sens

Mon".

3. Adjust

the

Vertical

and

Horizontal

Position

controls

if

necessary

(see

3.6.8).

4. Ensure

that

"Vert

Vernier"

is

set

for

"Cal".

5. Enter

the

RF frequency

from

the

keyboard.

6.

Adjust

the

squelch and

volume.

7. Adjust

for

desired

dispersion

of

.01

Mhz/div

(see

3.6.3).

8. Adjust

the

RF

step attenuator

to

give

the desired

signal level.

9.

Check for

the

presence

of

images

using

the

Image

Hi/Lo

switch

(see

3.7 .2).

4.4.2 PWR

MON

For high power

signal

monitoring

(.5

to

L25

watts)

Connect

the radio

under test antenna

out to the RF

IN/OUT

connector on the

Service Monitor.

Set the

FUNCTION

switch to PWR

MON.

Enter the

frequency from keyboard.

Move

the right cursor

to PWR.

Key

the radio

under test

and read

output

power.

CAUTION: To

prevent

undue stress on the

protected

cir-

cuits

it

is

advisable

to always switch the system to the

power

monitor before applying

power

in excess of

200

mw. Additional

protection

is

also obtained by making it

a

practice

not

to

leave

the

step

attenuator

in the 0

dB

position.
High-powered

equipment

in the 1-30 MHz range., which

have unusually

fast carrier

rise

times,

may damage

the

service

monitor

with

repeated activation of the

protect

circuit.

Ensure

the

FUNCTION

switch

is in the

"PWR

MON" position

(this

enables the

protect

circuit) before

RF

power

is

applied to

the

equipment.

In

either

monitor mode,

the

displays

can

be

selected

using

vertical

cursors to the left

of

each

LCD to

view

frequency,

frequency

error, modulation level., distortion

and

power

when

in

the

PWR

MON function for AM,

FM

or

CW signals.

FIGURE

4-4_TEST

SET.UP FOR

POWER

MEASUREMENT

l.

2.

3.

4.

5.

Imm

ANTENNA

[]mH

TRANSMITTER

\-

trtrtrtrtrtrtrtr8

4-3

4.4.2.I

PWR

MON

WITH

SPECTRUM

ANALYZER

(R-2400

only)

For

high

power

signal

monitoring (.5

to

125

watts)

l.

Connect

the radio

under

test

antenna

out to

the

"RF

InlOut"

connector

on the

service

monitor.

2.

Set

the

function

switch

to

"Anlzr

Pwr

Mon".

3.

Adjust

the Vertical

and

Horizontal position

controls

if necessary

(see

3 .6.

8).

4.

Enter

the

RF

frequency

from

the keyboard.

5. Move

the right

cursor

to

"PWR".

6. Adjust

the RF

Step attenuator

for

maximum

attenu-

ation

(70

dB)

7

. Key

the

radio

under

test

and

adjust

the

RF

step

at-

tenuator

for

the

desired

viewing

level.

8.

Read

the

output

power

on the LCD

display.

4.4.3

TRANSMITTER

DISTORTION

MEASURE-

MENTS IN THE

PWR

MON

FUNCTION

The distortion

meter

display

can be viewed in either

Generate

or

Monitor

function.

The

distortion meter

measures

the quality

of

the

audio.

1.

Connect

the

RF

IN/OLJT

to

the

radio

antenna

jack

and

connect

the modulation

output

to

the

radio mic

input.

Connect

the DEMOD

output

to the

multi-

purpose

input

BNC

connector.

This

allows

the unit

to

be

used

as a

test receiver.

2.

Enter

the

RF

Frequency

trtrtrtrtrtrtrtrtr

3.

Set the function

switch

ro

Pwr

Mon

and

tr

ro

Dist.

To

display

modulation

waveforms

of the transmitter

turn

the oscilloscope

source

switch

to

"MOD."

Adjust

the

I

kHz

tone

level

for proper

deviation.

(out

of

clipping)

Disable

PL if

resident

in

the rransmitter.

Read

transmitter

audio

distortion

in

o/o

on

the digital

readout.

Note

that

transmitter power

and frequency

error

can

also

be displayed

on

the

right

LCD.

FIGURE

4.s-TEST

SET-UP FOR

TRANSMITTER

DISTORTION

MEASUREMENT

4.

5.

6.

4.4.4

MEASUREMENT

OF TRANSMITTED

.(PL"

TONE

With

the internal

PL

frequency

counter

it is

possible

to

measure

the

PL

tone of a transmitter.

The function

switch

can be moved

to

either

monitor function

position.

l.

Select the PL

Count mode

located in

the modulation

section

using the

tr

cursor.

2.

Select

SENS MON

(sensitive

monitor) for off-the-air

monitoring.

3. Enter

the

frequency

from the

keyboard.

trtrtrtrtrtrtrtr8

4.

Key the transmitter

under

test and read PL

frequency

in the

upper

portion

of the right LCD.

NOTE:

The PL frequency counter measures frequency

inputs

in the range

of 60 Hz to

270 Hz. The

output

of

the

counter is displayed

on the right LCD

with

resolution of

.l Hz. In

cases of low PL tone deviation, the

value

of the

tenths

digit may fluctuate

periodically.

It

may be neces-

sary

to average the

displayed

values

over

time to

deter-

mine

the PL frequency within

.5

percent

accuracy.

FIGURE

4.6-TEST

SET-UP FOR

PL

COUNTER MEASUREMENT

4.4.5

SIMULTANEOUS

OSCILLOSCOPE/DVM

OP.

ERATION

The

use of

separate

CRT and LCD

displays

makes it

possible

to

view

signal waveforms

on the

oscilloscope

and simultaneously

view

the measured

digital

and analog

values

of the

waveform

on the left

LCD. To

measure

an

AC waveform

(RMS

value)

and display

the

waveform

on

the oscilloscope

CRT:

1.

Connect the

multipurpose

input

test probe

to the

circuit

to be measured.

2. Move

the left

tr

cursor

to DVM

and select

AC

volts

for

display.

3.

Select the EXT

AC

position

on the

oscilloscope

"SOURCE"

switch.

4.

Select the

proper

Volt

per

division scale

and

center

the trace.

\-/

\rtl

[lwE

Vert/SINAD

DEMOD

MOD

Dist/DVM

OUT OUT

TRANSMITTER

4-4

\-/

5.

6.

Read

RMS

volts

on the left LCD

display

in

both

digital and

analog form. Digital displays

are

for

accuracy

and analog displays are

for

use

during

peak-

ing and dipping adjustments.

Simultaneously

view

the signal

waveform

on the

oscilloscope CRT.

NOTE:

This feature can be used while the

service

monitor

-

rs

erlner

generatng

or monrto.ng a

Kr rrequency

or lor

t

","illll-r

general

purpose

troubleshootingofan

audiocircuit.

The

I

uruoen

resr

I x

AC

voltmeter

bandwidth

is

specified

to l0

KHz.

I

I

FIGURE

4-7_TEST

SET.UP

OSCILLOSCOPE/DVM

FOR SIMULTANEOUS
MEASUREMENT

\-

@ffi[]

1 PROBE

4-5

\'-

\,-

SECTION

5

APPTICATIONS

5.tr.0 SERVICE

SHOP

SETUPS

This

section

of

the manual

guides

troubleshooting,

diagnosing,

and

adjusting

communications

equipment

ranging

from

pocket

pagers

to

repeaters.

It

contains

in-

formation

on

how

to connect

equipment under

test

to

the R-2200

lR-2400

service

monitor

and

how

to set the

controls and indicators

to

obtain the anticipated

LCD

display. Maintain

a

permanent

written log

of

all

meas-

urements

and information

important

to

your

operation.

CAUTION:

These

are typical

applications and

are

not

all

inclusive.

Not

every

test

works

with

every transceiver.

Motorola

takes

no responsibility

for

their accuracy,

ap-

plicability

or safety. Always

refer

to

your

own trans-

ceiver's service manual

for

recommended

test

methods

and specifications.

The

service monitor's

DVM

input

is

unbalanced

(ground

referenced).

use an

appropriate

interface to measure

balanced

circuits,

such

as certain receiver

audio outputs

or telephone

lines.

FIGURE

5.1

-

SPECTRUM

ANALYZER DISPLAY

5.1..I SPECTRUM

ANALYZER

The

spectrum

analyzer

,

figure

5. I

,

displays the

RF

spec-

trum

while

center

frequency

is

shown

on the LCD

dis-

play.

Use the

keyboard

to

enter the

channel

center

fre-

quency

directly. Use

the spectrum

analyzer to

identify

interference,

trace

RF

and

IF

signals, observe

transmit-

ter

harmonics,

check

spurious

responses and

receiver

local

oscillator

radiation.

The

LCD

displays

the ap-

propriate

frequency

and

changes

the system

operating

frequency

as

required.

The

CRT

displays

a

window

of

the

RF

spectrum at

either

the

"Antenna"

or

"RF

InlOut"

port

in

a

range

selected

from

I MHz

to

999.9999 MHz

programmable

in 100 Hz increments.

The

observed

window

for

the analyzer

can

be

controlled

with

the dispersion

control. The

spectrum analyzer

has a

dynamic

range

of

at least

55

dB

with

the step

attenuator

in

the 0 dB

position.

With

the

attenuator,

the

useable

range

can be extended

up to

the

maximum allowable

in-

put

level. When

using

the attenuator,

add

l0

dB

per

step

attenuation

to the actual dB reading

on

the scope.

5.I.2

OPERATING NOTES FOR

THE

R.24OO

SERVICE MONITOR

WITH

SPECTRUM

ANALYZER

In

the normal

use

of a

spectrum analyzer,

the user

should keep in mind

certain

characteristics common

to

this instrument.

l. Noise

Floor

(grass)

-

caused

by the basic sensitivity

of the

spectrum

analyzer

receiver.

When

the disper-

sion switch

is

set to

it's widest

sweep

(l

MHz/div.),

the receiver's

IF

is necessarily

set to it's

widest

band-

width

(approximately

40 kHz)

allowing

more noise

through

the

IF

to be displayed.

At

the

narrower

dispersions, 0.1 MHz/div.

and

.01

MHz/div.,

the

IF

bandwidth is reduced

to

15

kHz and 6 kHz re-

spectively, causing the

noise

floor displayed

to

vary.

2. In

the

medium

and

narrow

dispersions, the

shape of

an unmodulated

carrier

displayed

is

due

partially

to

the

characteristics of the

IF filters.

The filters

used

in

the

R-2400

give

the

best compromise

between

shape,

attenuation, sweep

speed, and

RF

sweep

direction

(Im

age switch).

3.

The

noise

that appears

near

a

strong signal is

called

Sideband

Noise

(SBN).

It is

a measure

of the im-

purity

of the signals

presented

to

the

spectrum

analyzer receiver,

either

the signal applied from

an

external RF

source

(i.e.

transmitter)

or the

service

monitor's

own

lst

mixer's injectioil,

and these noise

components

will

add in

the

mixer

and could

both

be

observed

on the CRT.

It

is important

to

note

that

when

attempting to

judge

the

quality

of

an

RF

car-

rier

that

the

RF

synthesizer in

the service

monitor

could

contribute to

the SBN

of

the observed signal.

4.

As in

any

spectrum

analyzer, excessively

strong

signals,

even those

at a

frequency

not

displayed,

could

overload the

I

st

mixer

circuit

in

the

service

monitor

and

produce

excessive

SBN or discrete

spurious

signals that are not

actually

present

in the

applied

signal.

Therefore,

it is

always

good

practice

to

change the step attenuator

in l0

dB steps

while

observing

a suspected

spurious

signal on the CRT

display; if

the signal

rises

(or

falls)

more

than

(or

less

than)

l0

dB

for

a

l0

dB

step of

the attenuator,

the mixer

is

probably

being

overloaded. The

solu-

tion

is

to

add enough

attenuation

to

insure

a

dB for

dB

change

on the display.

If

an off-screen

signal is

still

too

strong to allow

observation

of the signal

of

interest,

a

"suck-out"

circuit

(either

a cavity

or

dis-

crete

component

filter)

must

be

inserted

to

reduce

this

signal.

5.

When

a

"spurious"

signal

appears

above

or below

the center frequency

displayed,

it

could be

an

"im-

age"

signal

caused by the service

monitor's mix

er /

local

oscillator.

To

determine if

this spurious signal

is

being

generated

internally,

change

the

"Image"

switch

and observe

if

the spur

moves

to the other

side of the display

or

goes

away altogether: if it

does,

then

it is

being

generated

internally

and

may

be

ignored.

5-l

\.-,

6. when

using

the

service

monitor's

*RF

Inlout,'

port

in

the

"Pwr

Mon/Anlzr

on"

mode,

there

iJ

no

directly

connected

signal

path

to

the

spectrum

analyzer

receiver.

Instead,

the

signal

path

iJ

loosely

coupled

through

internal

capacitance.

Thus,

a

signal

of

a

given

power

level

at

a low

frequency

will

appear

to

be

of

greater

power

at

a higher

fre-

quency.

Hence,

a transmitter's

harmonic power

will

appear

greater

than

it

really

is,

relative

to the level

of

the

carrier

display.

LEVEL

ACCURACY

ovER

WIDE

FREQUENCY

RANGES

IN

THE

..PwT

Mon/Anlzr

on"

MODE

Is

NoT

SPECIFIED.

Refer

to

page

5-6

for

a recommended

procedure.

7

. when

using

the

spectrum

analyzer

feature,

the

HORIZ

and

VERT

vernier

controls

MUST

BE

IN

THE

$CaLl"

POSITIONS.

Failure

to do

this

may

result

in

an

uncalibrated

display.

FIGURB

5.2-SINAD/z0

dB

QUIETING

TEST

SETUP

AND

DISPLAY

5.2.0

RECEIVER

SENSITIVITY

TEST.Iz

dB

SIN AD/

AUDIO

DISTORTION

Use

the R-2200

/R-2400

signal

generator

and

SINAD

meter

to

measure

a

receiver's performance

by the fol-

lowing

procedure:

l.

As

shown

on figure

5.2,

connect

the Monitor's

*RF

InlOut"

to

the

antenna

connector

of

the receiver

under

test.

Connect

the

service

monitor's

,,yert/

Sinad/Dist"

to

the receiver's

audio

output.

Disable

all PL's

and

open

the

Squelch.

2.

Set

the

function

switch

to

,,Gen".

3.

Select

the

RF

frequency

and

enter

directly

from

the

keyboard.

4.

Select

the

"Dev"

function

on

the

left

LCD.

Use

"Dev,

a/o

* /

-"

to verify

+ and-deviations.

5.

Adjust

"l

KHz

Lvl"

control

for

60Vo

of

rated

devia-

tion

as indicated

on

the

LCD.

To

prevent

spurious

noise

modulation,

set

"code

Synth

Lvl"

to min

and

"Ext

Lvl"

to

,,Off".

a. with

a l000uv

RF

input

level,

adjust

the

volume

;ffi

131,""Jil:

?',

ii

fi :

#ff

:,i:'

3Jl'

;

"?'*.ll;

!1

iii

J:f

:,'*"#;

I

"

ff ?,T,

il'3

: :l lf

,

1',..

X?

the

speaker.

b.

Select

"Dist"

on the left

LCD

to

display

distor-

tion

or

"SINAD"

to

display

SINAD.

6.

Set RF

Step

attenuator

to

-50

dB

and

the

"RF

ver-

nier"

to

mid-range.

The

displayed

RF

level

should

indicate

about

2uY.

Adjust

the

attenuator

(10

dB

steps)

and

the

"RF

vernier"

until

a 12

dB

SINAD

reading

appears

on

the

display.

7.

From

the RF

level

on

the

display, read

the receiver's

12

dB

SINAD

sensitivity

in

uV

or

dBm.

5.3.0 RECEIVER

SENSITIVITY

TEST

20

DB

QUIETING

l.

Connect

the

service

monitor

to

the

receiver

under

test,

as

shown

in

Figure

5.2.

set the

left

LCD

to

"DVM",

"Function"

switch

to

"Gen"

and

select

66FM"

or

"cw" mode.

Press

"Gen on/off'to

dis-

able

the

generate

function,

indicated

by the flashing

"Gen"

indicator

on

the left

display.

2.

Turn

on

the

receiver

(unsquelched)

and

turn

up

the

receiver

audio

gain

to

feed

audio

noise

to

the

moni-

tor

(at

least

% rated

audio

power).

Read

the audio

noise

voltage

fed

to the

monitor.

Note

the noise

reading

(REF)

in volts.

3. Press

"Gen

on/off"

to

enable

the

generator.

with

all modulation

off,

adjust

the RF

level

until

the dis-

play

reads

20

dB less

than REF

above

(0.

lOx

the

REF

voltage).

4.

Read

the RF

level

required

to

produce

20

dB

quiet-

ing

in

uV

or dBm

using

the

"RF

V/dBm"

key.

5.4.0

SQUELCH

SENSITMTY

TEST

l.

Connect

the

service

monitor

to

the receiver

under

test,

as

shown

in

figure

5.2.

Set

the

"Function"

switch

to

"Gen"

and modulation

to

"FM".

Enter

the

frequency

of

the

receiver

under

test.

2.

To

check PL/DPL

squelch

sensitivity,

enter

the

proper

PL/DPL

frequency/code

from

the key-

board.

Set modulation

switch

to

"cort",

select

pL

or DPL

mode,

enter Tone

Data,

and key

in

fre-

quency.

Ensure

that

"Ext

Lvl"

and

"l

KHzLvl,

are

off.

3.

Adjust

the

"Code

Synth

Lvl"

control

to

provide

a

nominal

750

Hz

(500

Hz -

I KHz)

deviation

of

the

PL/DPL

code. To

check

carrier

squelch,

turn

off

all modulation.

4.

Place

"Gen

on/off'

switch

to

off

to remove

the RF

output

from

the receiver.

Set

the receiver's

squelch

control

to

the

point

where

the

receiver

just

begins

to

quiet.

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5.

Return

"Gen

On/Off" switch to on.

Increase

the

RF

Level

by

adjusting the step attenuator

and

"RF

Ver-

nier"

controls

until

the

receiver

just

unsquelches.

a. On the

LCD, read

minimum squelch

sensitivity

as

uV or

dBm. This is

the

threshold

squelch

sen-

sitivity of

the

receiver.

b.

Determine the tight squelch

sensitivity

of

the

re-

ceiver

by

repeating

steps

4

and 5

with the

receiv-

er's

squelch control

set to

maximum

tightness.

6.

Enable the

receiver'sPL/DPl

squelch

circuit.

Fully

open

the carrier

squelch

control.

Increase

the

RF

level from

minimuffi, as

in

step

5, until

the

receiver's

squelch

just

opens.

On the

right

LCD,

read

the

coded

squelch

sensitivity

in uV or

dBm.

5.5.0

AUDIO

POWER OUTPUT

TEST

l. Referring to

figure 5.2, set

"Function"

switch

to

"Gen"

and

modulation to

"FM".

Enter the

RF

fre-

quency

and

PL

code.

2.

Adjust the step attenuator

and

66RF"

Vernier'

con-

trols to

l000uV

(-47

dBm).

Adjust the

"1

KHzLvl"

control

to 60u/o

of the

rated

deviation

on

the

KHz

scale.

LJse

the

"RF

InlOut"

connector

for this

test.

3.

Select

"DVM"

66AC"

function.

4. Connect a

suitable

resistive

load that

can

dissipate

the

receiver's

rated audio output,

in

place

of

the

speaker.

(If

the

receiver is using

a

"floating"

or

"bridge"

output

amplifier, connect

a

1:1

isolation

transformer

across the

load resistor).

Connect a

scope

probe

to the

service

monitor's

"Yert/SINAD/Dist"

input

connector

and

clip the

probe

across

the

load resistor or

to

the

isolation

transformer.

Connect

"RF

InlOut"

to the

receiver's

antenna

port.

Adjust the

receiver's

volume

control

for

the 10.

highest

voltage

reading

on

the

DVM

AC

scale

which

does

not have

clipping

or other

distortion

in excess

of the

radio's spec

as

viewed

on

the oscilloscope.

7. Calculate

the audio

formula:

Power

Out

(Watts)

-

power

by

the

following

(AC

volts)2

Lodd

Resistance

(ohms)

8.

If

the

receiver

does

not

produce

rated audio

power

output,

use the service

monitor's oscilloscope

and

a oG

RrF

scope

probe

to trace through

the

audio

stages

and

locate

the

problem.

5.6.0

AUDIO

FREQUENCY

RESPONSE

l.

Use

the

keyboard to enter

the

frequency

and

PL/DPL code

(if

any) of

the

receiver

under

test.

4.

Adjust

the

"Code

Synth

Lvl"

control

for

20t/o

of

rated

deviation

on

the

Dev

scale,

for

example:

1 KHz in

a 5

KHz

system.

Select

"DVM"

on the

left

LCD and

((AC"

volts.

Connect

the

service

monitor's

"RF

InlOut"

port

to

the

receiver's antenna

port.

Connect

the

"Y

ert/

SINAD

/Dist"

input connector

to the

receiver's

speaker

output

usin

g

a scope

probe.

If

the

speaker

is

"floating",

use

an

isolation transformer

to

avoid

shorting

the output

stage

to

ground.

Adjust the

receiver's

volume

control

to

obtain

a

ref-

erence

level

reading on

the

AC

volts

scale

which is

free

of

clipping

at

any

frequency

within the

300 to

3000

Hzband.

Return to

I kHz

and

note this

read-

ing as the

reference

level

(in

AC

volts).

Refer

to

the

audio

response curve

in the

receiver's

service

manual.

Change

the

Tone

A

frequency on

the

tone

display

LCD to

the

value

for each

point

on

the curve

to be

measured.

Maintain

FM

deviation

at

20a/o of

the

rated devia-

tion,

as set

in

step

4.

Note the

audio

level at

each

frequency.

The

level

in dB

must be

calculated

as

20 X

log(V/VREF)

where

VREF

is the

voltage

re-

corded

in step

6.

EIA RS-204C

specifies

the

frequency

response

for

NBFM

receivers over

the

range of

300H2

to

3000

Hz

as

follows:

a.

Audio

response

for receivers

using

loudspeakers

shall

not

vary more than

+

2

dB or

-8

dB

from a

standard

6

dB

per

octave

curve,

with

reference

taken

as

1000

Hz.

b.

Audio

response

for receivers

using

headphones

or telephone

lines

shall

not vary

more than

+

I

dB

or

-3

dB

from a

standard

6

dB

per

octave

curve,

with

reference

taken at

1000

Hz.

Plot the

resulting

values using

0

dB

as

the

reference

and compare

them

with

the 6

dB

per

octave

curve

in

your

receiver's

service

manual or

with the

EIA

specification

as shown

on

figure

5.3.

FIGURE

5.3

-RECEIVER

AUDIO

FREQUENCY

RESPONSE

5.

6.

'l

.

8.

9.

5.

\-

\'

6.

2.

Set the

"Function"

switch to

"Gen"

and

to

"FM",

step

attenuator and

vernier

l000uV

(-47

dBm).

3.

Select and

set

Tone A

to

1000 Hz. Set

switch

to

"Cont".

modulation

controls

to

modulation

5-3

5.7.0

MODUTATION

ACCEPTANCE

BANDWIDTH

l. Perform

the

12

dB

SINAD

Sensitivity

test

with

the

service

monitor

in

the

same

set-up

as

shown

in

figure

5 .2.

2.

Increase

the RF

output level

6 dB

above

the

12

dB

SINAD

level,

to

double

the

voltage.

For

example,

0.35uV

increased

6 dB

-

0.7uV.

3.

Turn

the

"l

KHz Lvl"

control

clockwise

to

increase

the

deviation

until the

SINAD

level returns

to

12

dB.

Read

the

amount

of deviation

on the display as

the

modulation

acceptance

bandwidth

of

the

re-

ceiver.

4.

A

typical

modulation

acceptance value

for

a

re-

ceiver is

7

KHz. Refer

to

the

specification for

the

specific receiver

under

test.

Any

loss

of

modulation

acceptance

bandwidth indicates

improper

align-

ment

or

a component

failure

in

a

receiver's

IF

cir-

cuit.

l.

Connect

the

service monitor's

"Antenna"

to the

antenna

connector

of the receiver

under

test.

Con-

nect

the

"Yert/SINAD/Dist"

port

to

the

RF

probe.

Connect

the

probe

to

the first

available

low

im-

pedance

point

following

the

preselector,

as

shown

in figure

5.4.

2.

Disable

the

receiver's

mixer

injection.

3.

Set scope

to Ext Vert

DC,'nFunction"

to

"Hi

Gen",

modulation

to

"CW",

and the

scope

sweep

control

to

"lO0uS/div".

4.

Enter

the

approximate

center frequency

of the

pre-

selector. Adjust

the

RF Level

(and

scope

vertical

controls) to

produce

a trace

on the

CRT screen

at

the lowest

readable

RF level

to minimize

the

possibility

of overloading

the

circuits

being tested.

5.

Using

the Frequency

Stepping function,

determine

at

what

frequency

the

peak

DC voltage

occurs

on

the

DVM

or CRT.

6. The

3

dB

(.707

of

peak)

and

6 dB

(.5

of

peak)

band-

width

points

can be checked

by

stepping

either

up

or

down

in frequency

and

observing

the

change

in

DC

level

from

the RF

probe.

PF PRESETECTOR S]IAPE

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FIGURE

s.4-PROBE

SETUP

5.E.0

RF

PRESELBCTOR

SHAPE

AND

BANDWIDTH

Use

this

test to insure

proper

preselector

alignment for

multi-frequency

receivers.

Tune

the

preselector

for

greater

rejection

of an

interfering

frequency

from near-

by transmitters.

FIGURE

s.s_FREQUENCY

ADJUSTMENT

SETUP

5.9.0

RECEMR

FREQUENCY

ADJUSTMENT

l.

Connect the

service

monitor

to

the

receiver

under

test,

as shown in figure

5.5.

2.

Set

"Function"

switch to

"Sens

Mon"

(or

"Anlzr

Sens

Mon"

on the

R-2400).

Program

the

monitor

for

the

local

oscillator

frequency.

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Place the

pick-up

loop in

close

proximity

to

the

receiver

so that the

local

oscillator signal

is

coupled

to the

monitor input.

Using the

frequency error

function,

adjust the

local

oscillator

for

the

desired

frequency.
Change

the

"Function"

switch

to

"Hi

Gen" and

enter the

proper

carrier

frequency.

Introduce suffi-

cient

signal

level into

the

RF input to

fully

quiet

the

receiver

and

adjust the

discriminator

to

zero

volts

DC for receivers

requiring

such an

adjustment.

For

receivers

with

quadrature

or

more

critical

detectors,

adjust detector

tuning control or

local oscillator

in-

jection

frequency for minimum distortion

or

best

SINAD

performance.

For

pagers

with

the battery saver

feature, check

the

local

oscillator

for

pulse

operation

without

remov-

ing

the

unit

from it's

housing.

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INATSHTTTER

FIGURE

5.6-TRANSMITTER

TESTS SETUP

5.10.0

BASIC FM TRANSMITTER

TEST:

POWER, FREQUENCY, AND DEVIATION

A. Basic

Terminated Measurements

l.

Connect the service

monitor's

"RF

InlOut"

port

to the RF

output

of

the

unit

under test

and

make

the

other connections

as

shown

in

figure

5.6.

CAUTION:

For

power

output

measurements,

connect

a

transmitter only to the service

monitor's

"RF

InlOut"

port.

Do not

connect

it

to the

service

monitor's

"An-

tennatt

port.

The

built-in RF

load

dissipates up

to 50

W

for

three

minutes

and up to

125 W for

one

minute.

If

a technician

keys

a

high-power

transmitter

into

the

monitor

for a

time

long

enough to threaten

overheating

the

power-

measuring circuitry, the system's

audible alarm

sounds,

warning to un-key.

Set

"Function"

switch

to

"Pwr

Mon"

(Or

"Pwr

Mon/Anlzr

Or"),

"FM",

and

"Squelch"

control

to threshold.

Enter

the correct

transmitter

carrier

frequency.

Set the

step attenuator

to

-30

dB.

For low-power

transmitters,

it

may

be

necessary

to

reduce

the

at-

tenuator setting

to unsquelch

the monitor.

Too

high

an attenuator

setting

or too tight

a squelch

setting

inhibits the

frequency error

display.

Ac-

curate

measurements

require

sufficient

signal

level

from

the

radio to fully

quiet

the

service

monitor's

receiver.

Use

good

quality

cables

of

minimum

length be-

cause cable-loss

can be

a significant

factor in RF

power

measurement,

especially at

UHF

and

above.

Key the

transmitter

and

read the

power

indicated on

the

display.

5.

Read the

transmitter's

frequency error

indicated

on

the display.

Refer to the

radio's

service

manual

to determine

if

power

and

frequency

are

within

spec

limits

and

determine

if any adjustments

are

required.

Proceed to check

modulation as

follows:

a. Turn off all

modulation

sources

at the "Mod

Out" of the

service

monitor

in order

to check

the

level of

PL or

DPL deviation

from

the

transmitter.

Switch

"Function"

to

"Pwr

Mon"

to

observe

recovered audio.

b. Key

up

transmitter

with

appropriate

PL

or

DPL

enabled

and read

"Dev"

from

the left

LCD.

Refer to radio service

manual to

deter-

mine if

adjustment

is necessary.

c.

With PL

or

DPL modulation

properly

set,

in-

troduce

I KHz

modulation

to

transmitter

audio

input

by

adjusting the

"l

KHzLvl" con-

trol. Check

service manual

to

determine

the

minimum

level

required

for

proper

MIC

sen-

sitivity

as

well as the

maximum

level

required

to

insure

proper

IDC

function. Read

"Mod

Out"

levels on the

DVM

by temporarily

switching

the

left

LCD

to

"DVM",

and

ttSourcett

to

ttAC".

d.

At

the

maximum

audio

input

level,

read

"Dev" on

the display

and

verify that

it falls

within the

maximum

rated

system

deviation

specified

in

the

radio's service

manual.

Make

adjustments

as

required.

e.

Verify

proper

MIC

sensitivity

by setting

"Mod

Out"

to the

minimum threshold

level

per

the

service

manual and

reading

corresponding

"Dev"

on

the display.

Off-The-Air

Measurements

l.

Connect

the

TEKA-} A

pick

up antenna

to the

service monitor's

"Antenna"

connector.

Change

the

"Function"

switch

to

"Sens

Mon"

(or

"Sens

Mon/Anlzr

On")

2. Operate the transmitter

under test

either

into its

own antenna

or

into a dummy

RF load, as shown

in

figure

5.6.

3.

Set the service

monitor's

"Squelch"

control

to

threshold, and

enter

the correct carrier

frequency.

3.

2.

3.

6.

7.

4.

4.

5.

B.

5-5

\-

C.

4. Adjust

the

attenuator

as in

step A-3

above, to

produce

an adequate

signal

level

to

the service

monitor's

receiver.

5. Adjust

the

transmitter

and

follow

the same

pro-

cedure

outlined in

steps A-5

through

A-7

above,

to

measure

frequency

and

deviation.

6.

This

same

method

may

be

used

to

verify

fre-

quency

and

deviation

of

a

remotely

located

trans-

mitter

by reducing

the

attenuator

setting to

fully

realize

the l.5uv

(10

dB

SINAD)

sensitivity

of

the service

monitor's

"of-the

-air"

monitor func-

tion. To

insure

sufficient

measurement

accuracy

however,

make

sure

the Monitor

receiver

is fully

quieted

as

in

step A-3

above.

Harmonic

Power

Measurement

(R-2400)

l. Referring

to Figure

5.6, insert

a fixed

power

at-

tenuator

between

the RF

output

connector of

the

transmitter

and

the

"Antenna"

port

of the

R-2400. The

power

rating

of

this

attenuator

must

be at least

equal

to

the rating

of the

transmitter,

and a minimum

of

30

dB

attenuation.

The input

power

to

the

antenna

port

must

not

exceed 0.5

watt.

2.

Set the

"Function" switch

to

"Sens

Mon/Anlzr

On"

and

enter

the

carrier

frequetrcy,

as before.

3. observing

the

CAUTION

above,

with

a

fixed

at-

tenuator

in

series, key

the

transmitter

and set the

step

attenuator

for

a

peak

indication

on

the spec-

trum

analyzer

between

the REF

and

-

l0

dB

graticules.

Note

the

displayed

level

and the step

position

in

dB. De-key

the

transmitter.

4.

Enter

the frequency

of

the harmonic

or spurious

signal

of

interest.

Key

the

transmitter

and

observe

the level

of

the

signal

on the spectrum

analyzer,

adjust

the

step

attenuator

if necessary,

should

the

signal

be too

low

to

observe.

confirm

that

the

signal

changes

l0

dB

for

a

l0

dB change

in

the

step

attenuator

setting

(See

notes

on

page

5.2).

Note

the level

of

the

signal

and

the step at-

tenuator

setting,

in

dB.

De-key

the

transmitter.

5.

Compute

the level

difference

between

the

carrier

and

the

spur/harmonic

as follows:

A.

Let

"REF":0

dB,

and

step

position

is

a

nega-

tive number.

B.

PC

-

displayed

level

of

carrier-(step)

ie.:

-3

dB-(-50

dB)

-

+ 47

dB

C.

Pl

-

displayed

level

of

spur-(step)

ie.:

-22

dB-(-30

dB)-

+8

dB

D. The

relative

difference

between

the

carrier

and

spur/harmonic

levels

is

P

diff

:

PC-P

|

:47

-8

:39

dB.

FIGURE

5.7

-TRANSMITTER

AUDIO

FREQUENCY

RESPONSE

FIGURE

5.8

-TRANSMITTER

AUDIO DISTORTION

SETUP

\-/

\./

IDv'ffi"-mor

lnt*rne

o

Rf

h/ort

tTiltffi/

Exr l{oriz

Dornod

on

Mod

orr

Exl,rod

h

ffin

*1.

.o*

l*1.

,-,

I

lntcrne

o

Yrt/SllAD/

Rf

h/On DistD'\rl'l

Ext l{rL

DGmod

Ort }.loO

Orlt

Ext I,lod

h

5-6

\-/

t(mlts

25fiI{s

3{III{z

FIGURE

s.9_AUDIO

FREQUENCY

RESPONSE

5.1.1

.0

TRANSMITTER

AUDIO

DISTORTION

1. Before starting

this test,

adjust

the

transmitter's

IDC

to

specification.

2. Connect

the service

monitor to

the

transmitter,

as

shown

in figure 5.8.

Observe caution

on

page

5-5.

3.

Turn

off

the

modulation.

Disable

PL

or

DPL. Set

"Function"

to

"Pwr

Mon"

(or

"Pwr

Mon/Anlzr

ont').

4.

Key

the

transmitter

and adjust

the

"l

KHzLvL"

con-

trol

for 6090

of

full-rated transmitter

deviation

on

the

left

LCD.

5. Select

"Dist"

on the

left LCD.

Read

transmitter

slo

distortion

from

the

display.

Unkey

the

transmitter.

5.1.2.0

TRANSMITTER

AUDIO FREQUENCY

RESPONSE

l.

As

shown

in

Figure 5.7

,

connect

the

service

moni-

tor's

"RF

InlOut"

port

to

the transmitter's

RF

out-

put

and

the

"Yert/Sinad/Dist"

input

jack

to

the

"Mod

Out"

jack

through a

BNC

tee connected

to

the

transmitter's

microphone audio

input.

Disable

PL

and

DPL.

2.

Select

6(DVM"

in

the

left LCD and

set

the

source

switch

to

"AC".

Set

"Function"

to

"Pwr

Mon",

"FM",

attenuator

to

-40

dB

modulation

to

"Cont"

and

"Tone

A". Enter

the

transmitter

frequency.

Turn

off

the

"l

KHzLvl" and

"Ext

Lvl".

When

us-

ing

an

R-2400, the

"Function"

switch

may be

set

to

"Pwr

Mon/Anlzr On" to observe

the

occupied

bandwidth

of

the

modulated

carrier.

Set

"Disp"

to

.01

MHz/Div.

3.

Enter

the

required

Tone A

frequency.

4.

Set

"Function"

to

"Pwr

Mon"

(or

"Pwr

Mon/

Anlzr

On").

Key the transmitter

and

adjust

"Code

Synth

Lvl"

to

provide

3090

of

rated

transmitter

deviation.

5.

Note

both

the transmitter

MIC audio

input

level

and the test

frequetrcy, for

later use.

6.

Repeat the above

procedure,

adjusting

"Code

Synth

Lvl"

to

maintain 30s/o

of

rated

deviation,

for

each

modulation

frequency

to be

tested.

Plot

the

data

points

obtained

above

in dB

relative

to

the

I KHz level

and compare

with

the

transmitter's

specifications.

EIA RS-1528

specifies

that

a trans-

mitter's frequency

response

be

within +

I

dB or

-3

dB

of

a

+

6 dB

per

octave

pre-emphasis

from

300 to

3000

Hz

(6

dB

per

octave

roll-off

allowed

between

2500

and 3000

Hz).

Refer

to

figure

5 .9.

FIGURE

5.10-AM

MODULATION

TEST SETUP

5.13.0

AM MODULATION

TEST

Connect

the service

monitor's

"RF

InlOut"

to the

output connector

of the

transmitter

under

test,

as

shown

in figure 5.10.

Set

"Function"

to

"Pwr

Mon",

('AM".

Observe

caution

in

basic

transmitter

tests

section.
Connect

the service

monitor's

"Mod

Out" connector

to

"Yert/Sinad/Dist"

and

to the

transmitter's

mi-

crophone

input using

a

BNC

tee connector.

Set

left LCD to

"DVM"

and

the

('AC"

voltmeter

function.

4. Adjust

the

"l

KHz Lvl"

control

to

provide

the

proper

input signal

level

to the transmitter.

Refer

to

the transmitter's

service

manual

to obtain

the

value

for

this

level.

5.

Key

the transmitter.

Read 9o

AM

on

the

left

LCD

display.

+9.5

G

7.

*l

rG

OG

1.

2.

3.

lni.m.

o

Yrrt/SilrD/

Rf h/(lrn

DbttDt

?'l

Ext

l{orts

Dcmod

Ofi

}'lod

qil

Ext

l-lod

h

oooeo

5-7

6. To

check

the

transmitter's

distortion,

connect

the

service

monitor's

"Demod

out"

to

the,ryert/

SINAD

/Dist"

input

jack.

set

left

LCD

to

,,Dist"

and

read

Vo

distortion

on

the

display.

If

using

an R-2400,

the

"pwr

Mon/Anlzr

on" function

may

be

used

alternatively,

to

observe

both

the modula-

tion,

recovered

demod

and

frequency

spectrum

signals.

$trgr

qrt

of

lhitiB

FIGURE

5.11

-

DUPLEXER

PASSBAND

ADJUSTMENT

SETUP

5.14.0

CAVITY

AND

DUPLEXER

TUNING

BANDPASS

ADJUSTMENT

A.

Passband

Adjustment

l.

connect

the

service

monitor's

"RF

Inlout"

to

the

in-service

duplexer

antenna port

as

shown

in

figure

5.11.

2.

set

left

LCD

to

"Dev",

"Function"

switch

to

"Gen",

"FM",

and

modulation

switch

to

"off'

position.

3.

Enter

the

receiver

frequency.

4.

set

the

RF

step

attenuator

to

-30

dB

and

the,,RF

vernier"

to

mid-ratrge,

to

allow

adequate

signal

to

get

through

a mistuned

duplexer

and

quiet

the

receiver.

Reduce

the

signal

generator

output,

as

necess

iltY

,

to keep

the

receiver

limiter

meter

read-

ing

below

saturation.

use

"Hi

Gen"

and

the

*An-

tenna"

port

if

the

duplexer

is

badly

mis-tuned,

to

start.

5. Tune

the

pass-band

knobs

of

the

cavities

in

the

duplexer

receive

leg,

for

a

peak

reading

on

the re-

ceiver

limiter

meter.

Reduce

the

signal

generator

output,

?S necess&ty,

to keep

the receiver

limiter

meter

reading

below

saturation.

This

completes

the

pass-band

adjustment

for

the

receiver

leg.

6.

Set

the

"Function"

switch

to

,,pow

Mon',

(or

"Pwr

Mon/Anlzr

on")

and

the

attenuator

to

-30

dB. For

low-power

transmitters,

it

may

be

necess

ary

to reduce

the

attenuator

setting

to un-

squelch

the monitor.

Too

high

an

attenuator

set-

ting

or

too

tight

a squelch

setting

will

inhibit

the

display

of

frequency

and

deviation

information.

7

. Enter

the

transmitter

frequency.

Key

the

trans-

mitter

and

tune

the

pass-band

knobs

of the

cavities in

the

duplexer

transmit

leg

for

maxi-

mum

power

output.

This

completes

pass-band

adjustments.

\**rl

Tr5{r

FIGURE

S.I}-DUPLEXER

ADJUSTMENT

SETUP;

RETECT

NOTCH

ON RECEIVE

LEG

5.15.0

CAVITY

AND

DUPLEXER

TUNING

BANDPASS

WITH

REIECT

NOTCH

B.

Adjustment

of Reject

notch

on the

Receive

leg.

l.

Connect

the

service

monitor's

"RF

Inlout"

to

the

in-service

duplexer

as

shown

in

figure

s.lz.

Disconnect

the

cable

at

the

duplexer

receiver

port

that

comes

from

the receiver.

Move

the

monitor's

"RF

Inlout"

cable from

the

duplexer

antenna

port

to

the

duplexer

receiver

port.

connect

a

power-rated

dummy

load

to

the

duplexer

anten-

na

port.

\./

\-/

[]*vffi*.rm

-

Yrt/SItAD/

Rf

h/On

Dbi/Enfi

Ext

Horiz

Demod

On

Hod

ort

Exr Hod

h

gooooo

n*vffi*ffil

Yrrt/StltD/

Rf

hy'on

DbrDryl.l

Ext l{3rL

D1n'od

qrt

Hod

{lrt

Ext

l.lod h

ooooo

5-8

\-/

Set

the

"Function" switch to

"Pwr

Mon/AnLzr

On" and

attenuator

to

-30

dB.

Verify that

the

display's

center

frequency reads

the

same

as the

transmit

frequency

in

step A-7 above.

Key the transmitter and

adjust

the

reject

notch

adjustments

on the duplexer receiver

leg

cavities

for

minimum

signal

on the

display.

Change

the

attenuator, as

necessary, to keep the

signal

on

the

display.

Loosen the

cavity

reject

adjustment

nut

and slide

it

within

its

slot

while watching

the

display.

Tighten the

adjustment nut.

Be careful

not

to

mistune the

rejection

adjustment.

Fine

tune

the

rejection adjustment by

turning

the

bandpass

knob a maximum

of + /

-15

degrees.

This

com-

pletes

the

duplexer

receiver leg

reject

notch

ad-

justment.

RE.fCT

FIGURE

5.13

*DUPLEXER

ADJUSTMENT

SETUP;

REJECT

NOTCH

ON

TRANSMIT

LEG

5.16.0 CAVITY

&

DUPLEXER

TUNING

BANDPASS WITH

RETECT

NOTCH

C.

Adjustment of

Reject Notch

on

Transmit

Leg

l.

Connect

the service monitor's

"RF

InlOut"

to

the

in-service duplexer

as shown

in figure

5.

13.

Dis-

connect the cable

at

the duplexer

transmitter

port

that

comes from the transmitter.

Move the serv-

ice monitor's

"RF

InlOut"

cable

from the

duplexer

receiver

port

to the duplexer

transmis-

sion

port.

Reconnect

the cable

coming

from the

receiver to the duplexer

receiver

port.

Disable

the

receiver

PL.

2.

Set

"Function"

switch to

"Gell",

"FM",

and

enter

the

receiver frequency.

Set

the attenuator

to

-30

dB and

the

"RF

Vernier"

to

mid-ratrge,

to

allow

adequate

signal

to

get

through

the duplexer

and

quiet

the

re-

ceiver.

Reduce the signal

generator

output,

&S

necess dry,

to

keep the

receiver

limiter

meter

below

saturation.

Adjust the

reject

notch adjustments

on

the

duplexer transmit

leg

cavities

for minimum

signal

level

on

the

receiver limiter

meter. Change

the

signal

generator

output,

as

necessary,

to

keep the

received

signal

up

out

of the

noise

and below

saturation.

Loosen

the cavity

reject

adjustment

nut and

slide

it

within

its

slot

while

watching the

meter.

Tighten the

adjustment

nut.

Be careful

not to

mistune

the

rejection

adjustment.

Fine-tune the

reject

notch adjustment

by

turning

the

bandpass

knob a

maximum

of

+

/-15

degrees.

Remove the

test equipment

and

connect

the

duplexer

back

to the

repeater.

Check

the du-

plexer

for

insertion

loss according

to

its specifica-

tions.

FIGURE

s.I4-DESENSITIZATION

TEST

SETUP

5.I.7.0

DESENSITIZATION

TEST IN

SERVICE

DUPTEXER

Perform this test

after

retuning

a

duplexer

or

after

detecting

inadequate

isolation between

transmitter and

receiver.

The following

conditions

may

make a duplexer

appear

mistuned:

High

VSWR antenna

IM

(intermodulation)

between

repeater's

transmit-

ter and an

external

signal

Faulty cables

or

connectors

Improper cable

length

or configuration

3.

2.

3.

4.

4.

5.

6.

/

\

n*ffi*ml

Vlrt/SIIAD/

Dirt/DVf'l

Ext

]lor! Ddrod Ort

l.lod

(lrl

€xt

l.lod

h

ooooo

IDcvffinon

IIH/SIIAD/

Rf

h/Ort

Dbt/Dtt'l

Ext

t{g7k

D1;nod

(t11

ttd

(11

Ext

t'lod

h

aoooo

t8-st3r:tsin

m $.J5:l2rB

RT TAP ffF

5-9

Normally,

repairing

or

replacing

cables

solves

the

prob-

lem

without

retuning.

check

the

duplexer

manufac-

turer's

data

sheets

to

determine

proper

installation.

l.

connect

the

service

monitor

to

the

repeater/du-

plexer

under

test,

as

shown

in

figure

s.14.

Connect

the

"RF

Inlout"

to

the

duplexer's

antenna

port

through

an RF

tap-off

isolating

device.

CAUTION:

To

prevent

RF

overload

into

the

generator,

provide

sufficient

isolation

between

the

tap-off

and

the

straight-through

feed.

For

example,

a 1000w

transmit-

ter requires

50

dB isolation.

2.

connect

the

"Yert/SINAD/Dist"

input

to

the

re-

ceiver

speaker

connection.

Disconnect

the

cable

from

the

"RF

rn/Out"

to

prevent

the

transmitter

from

keying

up

on

repeat.

3.

set

left

LCD

to

"Dev",

"Function"

to

"Gen",

and

enter

the receiver

frequency.

4.

Set

the

attenuator

to

-60

dB

and

the

"RF

vernier"

control

to

mid-range.

5. Adjust

the

"l

KHzLvl"

control

to

3.0 kHz

DEV

on

the

LCD.

6.

Reconnect

the

cable from

"RF

Inlout"

to the

RF

tap-off

and

enable

the

transmitter

to

key-up.

For

ex-

ample,

it

may

be necessary

to

provide

0.7s

KHz

PL/DPL

deviation

for

a

PL/DPL

accessed

repeater.

7.

with

this

generated

signal

introduced

to

the RF

tap-

off,

adjust

the

signal

generator

Step

attenuator

and

the

"RF

vernier"

to

the 12

dB

SINAD

level

as in-

dicated

on

the LCD.

Note

the

generator

RF

Level

on the right.

8. Disable

the

transmitter

from

key-up.

Readjust

the

signal

generator

to

obtain

12

dB

SINAD

again.

Note

the

generator

RF

level.

9. The

difference

between

the RF

level

for

lz

dB

SINAD

with

the

transmitter

off

(step

8)

and

with

the transmitter

on

(step

7),

is

the

amount

of system

desensitization.

10.

More

than

2

dB

desensitization

may

indicate:

defective

antenna

system

loose

shields

transmitter

spurs

improper

or defective

duplexer

cable

Check

them

all,

before

attempting

to

retune

the

duplexer.

\.t/

\-/

5-10

\-./

\_-

SECTIONI

6

MAINTENANCE

6.I.0

BATTERY

KIT

INSTATLATION

The following

instructions

detail

the

correct

procedure

for battery

kit installation,

RTP-4021A.

See

Figure

5-1.

l. Remove

and

discard

4

nuts

holding

the battery

retain-

ing

bars

to

the battery

case.

Remove

the retaining

bars

and batteries

from

the

case.

2.

Extract

the

Red

and

Black

battery

leads from

the

battery

compartment.

3.

Place

the

battery

case

in

the

battery

compartment.

Screw in

the

center

screws

and attath

the retaining

bars

with

the 4 screws

removed

in step

I

.

The battery

cilse should

now

be

attached

with

6 screws.

4.

Connect

the Red

lead

to

the

+

terminal, the Black

lead

to

the

terminal

on

one

end and

jumper

from

+

to

-

on

the

other

end of

the batteries

which

places

the

batteries

in

series.

6.1.I BATTERY

CHARGING

The

following

instructions

detail

the

correct

procedure

for

battery

charging.

NOTE: Prolonged

discharge

of

the

battery can cause

permanent

damage

to

the

battery.

New batteries must

be

shipped discharged

by

law.

1.

Connect

the

unit to

an AC power source and

select

"BATTERY"

c)n

the rear panel.

Turn the

unit

"ON".

The

unit will

charge

in

either the

"BATTERY"

or

"EXT

DC"

positions.

2.

Read

the battery

voltage

by selecting

"BATT"

on the

right

LCD.

A fully

charged

battery will read I

3

.6 volts.

Overnight

charging

of

the battery

can be accom-

plished

by leaving

the unit

in

"ON"

or

"STANDBY"

and will

fully

charge

the newly installed

battery.

FIGURE

6.I

_BATTERY

INSTALLATION

NOTE:

If

AC

power

is

connected

to the unit, the AC

power

will

be

used

rather

than DC

power.

6.I.2

OPERATION

FROM

AN

EXTERNAL

DC

SOURCE

The following

instructions

detail

the

correct

procedure

to

operate

the

unit from

an

external DC

power

source. The

connector

kit

RPX-4097A

consists

of

a connector shell,,

clamp.

and

four connector pins.

These parts

can be

used

to

fabricate

a mating

plug

for

the male

DC

power

connec-

tor at the

back

of the service

monitor

and enables

the

user

to make

a DC

power

cable to interconnect

a sepa-

rate

power

source

to

the

service

monitor.

l.

Assemble

the

connector

kit RPX-4097A

as follows:

pin

I to

+

(ll

to 17

VDC)

pin

2

to

NC

pin

3 to NC

pin

4

to

ground

NOTE:

Use

wire

large

enough

to carry

6

amps with

no

significant

loss,

ie.

I

tt AWG

for

up to

6

feet

20

AWG

for

up

to 16 feet

The

terminals

supplied

are

#18-#14

with ins

diameter

. l

10"-. 150"

2.

Select

"EXT

DC"

on the

rear panel.

3.

with

no AC

applied

to the

unit, turn

the unit on and

measure

the External

DC voltage

using

the

"BATT"

measurement

on

the right

LCD.

This voltage

must be

between

ll

and

17

volts

DC for

proper

operation.

NOTE:

If

AC power

is

connected

to the

unit, the AC

power

will

be

used rather

than DC

power.

6-l

6.I.3

PACKAGING

INSTRUCTIONS

Any

time

the

unit must

be

shipped

via

commercial

car-

riers,

it must

be

packaged

to

prevent

damage. The

recommended

package

for

shipping

is

the

original

ship-

ping

carton

the

unit was

delivered

in.

These

boxes

when

properly

taped

closed,

are

designed

to

prevent

shipping

damage.

If

thc orieinal

shipping

cartons

are

not

available. the

RTL--Il

l5A

Transit

Case is

highly

recommended

and is

rulso

designed

to

safely

cushion

rhe

unit in

shipping.

Lacking

the

above,'

a

double-box

of

strong.

undamaged

cardboard

with

expanded

plastic

filler

can be fabricated

from

available

shipping

cartons.

NOTE:

In

the

event

that

equipment

is

returned to the

Motorola

Test

Equipment

Service

Center in

a

dam-

aged

condition

due to improper

packaging.

Motorola

will

assume

no liability

for

the damage.

6.I.4 INSTALLATION

INTO

EXISTING

R.22OO

UNITS IN

THE

FIELT)

The RPX-4309A

kit is

available

on

a

FIELD

RETRTFIT

basis

for

any R-2200

already shipped

and installation

is

very

simple.

Basically,

only

a screw

driver

to remove

the

top

cover,

2 new EPROM's

which

are included

in the RPX-

4309A

and

&,

wire

must

be soldered

on

the

bottom mother

board is

all that is

required.

The wire is

only necessary

to

allow

the unit

to include non-volatile

memory.

RTL-4l6lA

installs

in

option

module slot A,9 which

is

color

coded

red.

Insert main

software

(P/N

5

1R80323805

& 5 1R80323806)

into

the appropriate

sockets located in

CPU

Board,

RTC-

4023A.

Observe

polarity

and

location

when

exchanging

software.

v

\./

6-2

\-/

MOTOROLA,

INC.

coMit

u

NtcATtoNs

sEcToR

TEST

EOUIPMENTSERVICE

CENTER

EAST

1313

EASTALGONOUIN

ROAD

SCHAUMBURG,

ILLINOIS

60196

TEST

EOUIPME]TT

SERVICE

CENTER WEST

2333

B. Utah Avenue,

El

Segundo,

CA

TEST EOUIPMENT SERVICE

REOUEST

FORM

This

completed form must

accompany

equipment

returned

for

service.

CUSTOMER'S

PURCHASE

ORDER NO.

DATE

MODEL

NUMBER

SERIAL NUMBER

DESCRIPTION

OF

PROBLEM:

REOUESTED

SERVICE:

I

sHlP

ro ADDRESS'

j

SHIP

VIA:

Provlding

thc

information

bclow

will rcducc thc turneround

tim. on

your

Tcrt

Equipmcnt Scrvicc.

TUIOTOROLA

CUSTOMER

NUMBER

BILL TAG

SHIP

TAG

INTERNAL

MOTOROLA

ACCOUNT

NO.

\-

SIGNED:

'

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'*-

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