Motorola R-2001D User manual

@

MOTOROLA

test equipment

Communications

System Analyzer

INC.

OPERATOR'S

R-2001

D

MANUAL

..

~

68P81069A66-B

MOTOROLA TEST EQUIPMENT PRODUCTS

LIMITED WARRANTY

(EXCLUDES EXPORT SHIPMENTS)

Motorola Department

This Motorola, during tion Transportation

This

In

In the event module remain PRESS TY,

For ser vice Scha 1-312-576-7025.

Test

are

express

warranty

at its

the

period

prepaid. Proof

warranty

(a)

The

(b)

The

(c)

The

no

event shall

Motorola

or

subassembly in force OR

IMPLIED,

ARE

EXCLUDED

on your

umburg

, Illino is 60196 or call

Equipment

warranted

option

of

charges

is

void,

product

seals

product has been subject to misuse,

Motorola

on

Out

Products

by

Motorola

is

extended

, will

either warranty, and of

purchase for the

return

as

determined

has

not been

on

non

-user serviceable

be liable for

elects

to

repair

with a new o r re c

the replac

side

ement

INCLUDING

.

Moto rola test

the

U.S. c

(herein

to

the

repair,

the

defective

and

evi of

in the reas

operated

any

a defective

module

ANY

equipment

th e Test Equi

onta

the "product")

for a

period

original

or

replace

dence

the

product

onable

in ac

components or

special, incidental,

onditioned

or IMPLIED

ct yo

ur

of

purchaser

the

product

of

date

to

judgement of Motorola

cordance

abu

product

replacement

subassembly .

that

one

(I)

year

only

product

is

returned

of

shipment

Purchaser

with

modules

se,

damage,

or

by replacing a

EXCEPT

WARRANTY

SUPPORT SERVICES

in

the

U.S. co

nt act the T est Equi pment Service Center,

pmen

nearest Motorola re

t Service Hotline: 800/ 323-6967 duri ng normal business ho urs. In

are

manufactured

from

date

. In

the

event

providing

shall be

the

consequential

module

that

to

Motorola

(packing

prepa

procedure

are

broken

acci

den

t, negligen ce,

module

or subassemb

AS

SPECIFICALLY SET

OF

FITNESS FOR A PARTICULAR

pre

sentative.

or

dis

of

shipment

of a defe

Motor

at 1313 East Algonquin Road,

list o r invoice) must

id by Moto

, if:

s desc ribed in

;

damage

or

suba

tributed

again

ct,

malfun

ola receives written notice specifying the nature

rola

the

repair

s.

ssembly, Motoro la , at its option, may replace such defective

ly. Only

by Mo

st defects in

ction , o r failure

accompany the

.

ope rating instruction;

or

alterat

the unexpired wa

FORTH HEREIN. ALL

tor

mater

ion.

PURPOSE

Schaumbur

ola Commun

ial

and workmans

during

Schaumburg

return

rranty of

icat

ions

hip.

the period

, IL 60196

of the defective p

the

warr

anty

WARRANTI

O R

MERCHANTABILI

g, 1313 E. Algonquin Rd. ,

Group

Parts

of

war

ranty,

of

the

def

ect

transport

roduct.

product will

ES EX-

EPS-30828-0

lllinoi'

call

a-

-

n

Mo

dular cons

deli ve r

tructi

y.

Out

The

grams for

on o f the R2001 allows field repl acement of individual assemblies. Contact the Test Eq uipmem Service Center for pricing a nd

side the U.S. conta

Motorola

stored

products

in

semiconductor

certain reproduce in any form the grams

contained any manner shall

not

in the

without

be deemed copyrights, patents use

that

arises by

operation

MODULE EXCHANGE PROGRAM

ct yo ur nea rest Mo torola repre s

COMPUTER SOFTWARE COPYRIGHTS

described in

exclusive

copyrighted

Motorola

the express

to

grant

or

patent

of

applications

this

instruction

memories or

rights

for

copyrighted

computer

products

written

either

described in

permission

directly

of

law in the sale

other

Motorola, except of

entative

manual may

media

computer

program.

of

Motorola

or

by i

mplicat

a product.

.

. Laws in

Accordingly

this

instruction

include

the

United States and

programs

, any

manual

. Furthermore ,

ion,

estoppel

for the

normal

copyrighted

, i

ncluding

copyrighted

may the

, or

otherwise

non-exclusive.

Motorola other countr

the

exclus

ive

right

Motorola computer

not

be

copied

purchase

or reproduced

of

Motorola

, any license under the

royalty

computer

ies preserve

to

copy

products

free license

EPS-34440

pro-

or

pro-

tn

to

-B

Specifications

~,

Motorola

Printed in U.S.A. •

•

,

Prlvate·

subject

Line, and

to

change without

Digital

«'

1985

M

Pnvate·Line

oto

rola

notice In

c.

.

are

trademarks

ot

Mot

orola,

Inc

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®

MOTOROLA

Communications Sector

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U.S.A

1985

.

COMMUNICATIONS

ANALYZER

Motorola

®

Equipment Products

1313

E.

Schaumburg, IL 60196

R-2001

Test

Algonquin Rd.

iii

SYSTEM

D

68P81069A66-B

7/15/

85

PHI

MOTOROLA

INC.

®

Communications

Sector

Many

of

the integrated circuit devices used in com-

of

munications equipment are tary Metal Oxide Semiconductor) type. Because high open circuit impedance, to

damage from static charges. Care must be taken in handling, shipping, assemblies in which they are used.

Even though protection devices are provided in CMOS overvoltage in the hundreds encountered in elements distribute static charges circuits, decreasing the chance

CMOS circuits of

handling, shipping,

particularly after moving within the service area, momentarily touch grounded surface. This will discharge any static charge which may have accumulated servicing.

IC

inputs, the protection

an

can

the modules even

To

avoid damage

1.

Prior

to

and

operating system.

be damaged by improper handling in

a system.

to

and

while servicing a circuit module,

both hands

the CMOS (Complemen-

CMOS

servicing them

of

circuits, observe the following

servicing precautions.

ICs are vulnerable

is

effective only against

volts range such as are

In

a system, circuit

and

load the CMOS

of

damage. However,

to a bare

on

the person doing the

INTEGRATED CIRCUIT DEVICES

of

their

and

the

metal earth

SAFE HANDLING OF CMOS

2.

Whenever possible, avoid touching any elec-

of

the

trically conductive parts hands.

3.

Normally, circuit modules

removed with power applied check the tions

diagram tice.

carpeted areas, dry environments, clothing (silk, nylon, etc.) because they contribute static buildup.

be grounded. equipment to the circuit module

INSTALLATION

of

the manual as well as the module schematic

to

insure there are

4. When servicing a circuit module, avoid

5. All electrically powered test equipment should

Apply

the ground lead from the test

circuit module with

can

be inserted

to

the unit. However,

and

MAINTENANCE

no

objections

and

to

certain types

before connecting the

test probe. Similarly, disconnect the test probe prior

removing the ground lead.

6.

If

it

is

desirable

of

sheet through 1

a circuit module

to

lay it

aluminum foil) which

OOk

of

resistance.

is

removed from the system,

on

a conductive surface (such as a

is

connected

your

sec-

this prac-

to

ground

or

of to

to

NOTE Wearing (Motorola No. RSX-4015A) will minimize static buildup during servicing.

When wearing Conductive Wrist Strap, be careful near sources The

good strap will also increase the danger lethal shock from accidentally touching high voltage sources.

in

U.S.A.

Conductive

WARNING

ground

1982

of

provided by the wrist

~klrrnu@@ll

Wrist

high voltage.

1301

Strap

E.

Algonquin

If

the aluminum foil

to

ground, trical shock from contacting the foil same time as other electrical circuits.

7. When soldering, be sure the soldering iron

grounded.

Prior

8. components, necessary in the replacement device), be sure to discharge any static buildup as

of

WRU~irrng

Road, Schaumburg, II. 60196

described in procedure 1. Since voltage differences exist across ly one CMOS device

hand

the

be used

:f@lf\V/U~

v

WARNING

is

connected directly

be cautious

to

connecting jumpers, replacing circuit

or

touching CMOS pins (if this becomes

human

and

body, it

if

it

is

associated

of

is

recommended

necessary

board

possible elec-

at

the

an

integrated circuit

to

touch pins

wiring.

68P81106E84-C

12/10

/82- PH!

that

on

is

can

on-

the

9. When replacing a CMOS integrated circuit device, leave the device in its metal rail container or conductive foam until it

is

to be inserted into the printed cir-

cuit module.

10

. All low impedance test equipment (such

as

pulse generators, etc.) should be connected to CMOS

device inputs after power

is

applied to the CMOS circuitry. Similarly, such low impedance equipment should be disconnected before power

11.

Replacement modules shipped separately from

is

turned off.

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 NONCONDUCTIVE MATERIAL for packaging these modules.

~

VI

~

R-2001

'--....--

Specifications

D Communications

System

Analyzer

Signal Generator Mode

Operating/Display

Stabilization Time: 1 Sec

SPECTRAL PURITY

Externa Ill nterna I

Frequency Range: 5

External/Internal

Frequency Range: 5

DOUBLE SIDEBAND SUPPRESSED CARRIER

Carrier Suppression:

SWEEP GENERATOR

Adjustable sweep chronized to internal scope display.

Modes:

FREQUENCY

Range:

Resolution:

Accuracy: Refer to

OUTPUT

Attenuator:

Range FM: Range AM: 1

Accuracy:

Spurious:

Harmonics: -

FREQUENCY

MODULATION

Deviation: Residual FM: Residual AM:

Modes: Internal. external. microphone or all

AMPLITUDE

MODULATION

Range:

External Input:

Modes: Internal, external. microphone or all

Range: 1 MHz to 500 MHz

AM/FM/CW/SSB Monitor AM/FMICW/DSBSC Generate

Signalling Simulator Spectrum Analyzer Duplex Generator Memory Tables

Frequency Counter Digital Voltmeter

Wattmeter

IF Display Oscilloscope Signal Strength Meter SINADIDistort10n Meter

10kHz

to 999.9999 MHz

100Hz

16

dB variable plus

1

p.V

to 1 VRMS

p.V

to

± 3 dB maxi

pOSI!IOn.

+ 4 dB max1mum

-40

dBc

15

dBc

0-75 kHz peak

20

Hz

max. @ 300 to

1.0% max. @ 300 to Hz

to 20 kHz. ± 3 dB

Simultaneously

0 to

80%

Hz

to

Approx. 150 mV for Simultaneously

-15

dB

MODE

w1dth

from

10kHz

accuracy

.4

VRMS mum

from 1 to 500 MHz

10

kHz. ± 3 dB

to

10

MHz

Monitor Mode

Frequency Range:

Resolution:

FREQUENCY ERROR

to 999.9999

Spurious Response:

Accuracy:

Indicator:

Input Sensitivity: 1

(over the 4

MHz

range)

1 MHz to 999.9999 MHz 100Hz Equal to that of master oscillator

Autoranging CRT display. Resolution ± for frequency error measurements

10.0 kHz and 100.0 kHz full scale ranges 1

resolution for frequency error less than 100 Special funct1on control quency readout to 1

.5

V for

10

for

dB

10

dB EIA SINAD

at

± 21.4 MHz

at L.O.

harmonics ± 10.7 MHz

MHz

11

(narrow band ± 6 kHz mod. acceptance)

7.0

p.V

± 100 kHz mod. acceptance)

- 40 dB typical

0 dB image

-

10

Monitor Mode (Continued)

of master osc1llator

10

dB steps over

with

step atte

1n

any other state General

3kHz

80%

at

a fixed sweep rate.

Will

Hz

resolution

EIA

SINAD

13

ranges

nuat

or

in 0 dB

from fc

'

t1me

base

10

on

1.0 kHz.

allow direct Ire-

(w1de

band

Syn-

Hz

Hz Hz

SPECTRUM ANALYZER

DUPLEX GENERATOR

Frequency Resolution:

FREQUENCY COUNTER Normal

Period Counting Frequency Determination

Auto Tune (SCAN LOCK)

DEVIATION

MEASUREMENT

AM MODULATION

MEASUREMENTS

SIGNAL STRENGTH

RF WATTMETER

Frequency Range:

Frequency Offset: 0 MHz to ±

Frequency Accuracy: ± .002%

Deviation Range:

Frequency Response:

OSCILLOSCOPE

Frequency Response:

Synchronization:

Input Sensitivity: 50 mV

Acquisition Time: 5 sec.

Scales:

Accuracy:

Peak Deviation

Dynamic Range:

External Vertical

Limit:

Range:

Accuracy:

METER

Range:

Sensitivity:

Selectivity:

Range:

Scales:

Accuracy: ± 10% from 1 Watt to 125 Watts

Protection: Over-temperature

Scan Width:

Sensitivity : -

Output level: -

CRT Size:

Input Ranges: Sweep Rates : 1

Range:

Display: 5

Range:

Display:

Range:

Accuracy: ± 1

1.

10.

±

5%

Set

v1a

99.9 kHz). t1on

and will be active

0 to 100%

±

5%

1 MHz to 999 9999 MHz

- 100 dBm to

t1on

of antenna and transceiver ports.

30 kHz Max. @ 3 dB bandwidth

1 Watts to 125 Watts

9.99. 99.9.

1 MHz to 1 GHz

75

dB 100kHz t1nuously adtustable

95

dBm

5kHz

35

dBm minimum 0 to ± 20 5

Hz

to 20

8cmx10cm DC

to 5 MHz. 3 dB

10

mV.

us. diViSIOn Internal. normal. and automatic mode JUStable

10Hz

dig1t

10Hz

4 dig'it autoranging to 3 kHz. 3 digit autorangmg to

tOO

In

the monitor mode. the unit has the to automatically find and then tune to an s1gnal to 1 GHz

is utilized.

Hz

100 kHz full scale of readmg

keyboard to 100

Aud1ble

of reading

125

min1mum

per

divis1on

m1n1mum

10

kHz

peak

kHz.

100

mV.

10

us

..

1 ms. 1 ms

tngger level.

to

35

MHz

autorang1ng

m1n1mum

-100kHz kHz

above

-30

typ1ca1

to less than 1 sec.

of actual mput frequency

Specifications continued on next page

Hz

resolution (0 kHz to

alarm

1nd1cates l1m1t

1n

all Mon1tor Modes

+52

dBm. combined

Watts

to 1 MHz per

MHz and fixed ±

1nto

50 ohm load

± 3 dB

po1nt

tV.

10V

per

..

01

dBm. Operates from 1 MHz

spec1f1ca-

divis1on

45

MHz

d1v

sec. 1 sec per

IF

l1m1ted

w1th

capab1l1ty

cond1-

con-

ad-

1t1put

scan

v

ii

R-2001

D Communications

System

Analyzer

~

General (Continued)

DIGITAL VOLTMETER

Modes of Operation : Encode and Decode capability lor

Frequency Range: 5 Hz

Sl

NAD/DISTORTION

Distortion Accuracy:

Optional Ovenized

Readout: Autorangmg 3

DC

Accuracy: ±

AC

Accuracy: ± 5%

AC

Bandwidth:

SIGNALLING

SIMULATOR

Resolution: 0.1 Hz,

Output

Input Impedance:

SINAD Accuracy: ± 1 Distortion Range:

Standard TCXO:

Level: 3 Volts RMS

METER

Input Level: 0 5 V

ANALOG

SYNTHESIZER

TUNING (AST)

Step Size:

Calibration: TIME BASE

High Stability:

lull scale

50

1 S1ngle Two-Tone Un1versal D,g,tal Base Mob1le

5/6 tone pagmg Select V

Hz decode

10

1% lb 0 5% 2% distortiOn 1n 10%

Var~able

360 32

Ag1ng Temp

Agmg Temp ± 05 x 10-6 max1mum

d1g11

d1sptay

1%

of

lull scale ± 1

of

lull scale

Hz

to

20

kHz

l1xed

tone

Tone

Vanable Frequency sequent1al 10

tone sequential

sub-aud1ble

Stat1on

Tone

Telephone IMTS MTS 2805

Hz

S1gna1tmg

to

9999.99 Hz encode, 5.0

5Hz

to

K ohms

steps per 360° rotation (approximately)

into

minimum

to

10

Volts

dB

at

12

dB

20

%

d1Siort1on

steps from 3200Hz

o of

rotat1on

± 1 X

10

± 1 x

10

to

+55

± 1 x

10

oo

to

+ 55°C temperature range (Warmup quency

LSD

pag1ng

squelch

Remote

9999.9 Hz 600 ohm

RMS SINAD

1n

1%

to 10% range

to 20% range

-6 per

year

-6 max1mum

oc

temperature range

-6 per year

to

± 5 x

20

10-'

mmutes)

w1thm

1.

10

100.

300 volt

Hz

to

9999.9

to

3 2

GHz

error over the 0 o

error over

of I mal

per

Ire·

the

General (Continued) Power and Environmental

AC: 100

Battery Option :

DC

Dimensions:

Weight:

VAC

swl!ch selectable

:

11 0 to + 16

+

13

6 Volts.

8

25

1n

(21

em x 39 4 em x 50 8 em)

35

5 pounds

pack cover accessones (

Model Nomenclature

R·2001

D Basic Model

R·2001

D/HS

With

high

stability

R·2002D

With

IEEE-488 R·2002D/HS High R·2004D

With

R·2004D/HS

R·2005D

With

R·2005D/HS High

option

With

R·2008D

R·2008D/HS High R·2009D

With

R·2009D/HS

option

R·2010D

With R·2010D/HS High R-2011 D With R-2011

D/HS

option R-2021 D With R·2021D/HS

option R·2045D

With R·2045D/HS High

and SECURENET

NOTE: Factory set 220 Volt models are to model number.

stability

Motorola

High

stability

Motorola SECURENET option

stability

cellular

option

stability

IEEE-488 Bus and

With

high

stability

UK

cellular stability

IEEE·488 Bus and

High

stability

Motorola Trunked Radio option

High

stability

Motorola

stability options

oscillator

option

oscillator

DES

option

oscillator

cellular

oscillator,

option

oscillator

UK

oscillator,

oscillator

DES

and SECURENET options

oscillator

Optional Accessories

RTP

·1002A Battery Pack RTL·4056B Protective Canvas Cover RTL·4065A Transit Case

RF

RTL·4075A RTA·4000A Telescoping Antenna

Detector Probe

to

130

VAC

or

200

47

VDC

50

m1nutes

h1gh x 15

50

(baSIC

and IEEE-488 Bus

and Motorola

and Motorola SECURENET

and

cellular

options

IEEE-488 Bus and

and

UK

cellular

IEEE-488 Bus, and

and Motorola Trunked Radio

and Motorola's

also

VAC

Hz

to

63

typ1cal

w1de x 20

exclud1ng

16 1 kg)

DES

option

DES

Hz

1nput

option

UK

external

1n

model)

cellular

option

available. Add "/220 "

to

260

and

00

cellular

VAC

400

1n

deep

ballery

Hz

,..-----.,..,

Vlll

~

OPERATOR'S

MANUAL

COMMUNICATIONS SYSTEM ANALYZER R-2001D

TABLE

OF

CONTENTS

Page

Limited Safe Handling Specifications Table List List List

Scope Service

Test

Replacement Parts Orders Area Installation Packing Initial Set-up

Battery Pack Trace Rotation Adjustment Accessories

Description

Front

Rear Panel Bottom Panel 2-10

General Power Self-Test 3-l Keypad CRT System Warnings 3-2 Function Section Modulation Fixed I KHz Code Synthesizer 3-3 2805 Base Originated Modulation/Function External Level Display Section Generate/Monitor Generate 3-4 RF RF

Generate RF Analog Synthesizer Tuning (AST)

Warranty

VII

of

Contents

of

Illustrations

of

Tables

of

Abbreviations xiii

Section I -

of

Manual

Equipment

Parts

Panel 2-2

Section

Display Screen 3-2

Level 3-4

Output

Mode

Scan

Control

Service Centers

Offices

Section 2 - Description

Section

Tone

Metering 3-4 Frequency

Level

Introduction

3 -

Operation

Xll

1-l 1-l 1-l l-2 l-2 l-3 l-3 l-3 l-3 l-3 l-4

2-1

2-10

3-1 3-l

3-l

3-2 3-3

3-3 MTS Mobile Telephone

3-3 3-4 3-4

3-4 3-5 3-5 3-5

ii

v

ix

XI

RF

Sweep

Monitor Special Function Mode Special Function Control Auto Scan Latch Mode

Monitor

Volume

I Off-The-Air

Signal Strength Meter

FM Demodulation Audio AM Demodulation Single Sideband Demodulation Audio

Modulation Spectrum Analyzer

Duplex

RF Memory Entry With Memory Table Entry

Preset Signaling Sequence

I

Signaling Sequence Menu Decode PL

Decode

DPL A/ B Encode Two-Tone Sequential Paging

516

I

Cap

516

Select V Encode Select V Decode General Encode General Decode Mobile Telephone Signaling IMTS Mobile Originated IMTS Base Originated

Tone Tone Tone

(DVM/ DIST) Digital Voltmeter / Distortion Mode External Wattmeter Intermediate Frequency (IF) Oscilloscope Section Scope Addendum

Generator

Mode

Tune

Mode

Section

And

Squelch

Monitor

Filters

Monitor

Generator

Without

Turn-On

Mode

Decode

Tone

Codes

Tone

Sequence Remote (Encode) Remote (Decode)

AC

Memory Table

Screens

Encode

Decode

Counter

or

Scope DC

- Self Test Displays

Code

Control

s

Mode

Page

3-5 3-5 3-6 3-7 3-8 3-8 3-8 3-8 3-8 3-8 3-8 3-9 3-9 3-9 3-9 3-9 3-9 3-10 3-10 3-ll 3-ll 3-ll 3-11 3-11

3-11 3-12 3-13 3-13

13

33-

13

3-

14

3-14

14

33-15 3-15 3-15 3-15

3~16

3-16 3-16 3-17 3-17 3-17

17

33-18 3-18 3-19 3-19 3-20 3-20 3-21

ix

Page

Section 4 - Applications

Service Receiver Sensitivity Test,

Audio

Shop

Setups

Distortion

12

DB

SINAD,

Receiver Sensitivity Test, 20 DB Quieting Squelch Sensitivity Test Audio Audio Modulation RF Receiver Frequency Basic

Audio Audio

Power

Output

Frequency Response

Acceptance

Preselector

FM

& Deviation

Basic

Shape

Transmitter

Terminated Off-The-Air "In-Line"

Distortion Frequency Response

Test

Bandwidth

and

Bandwidth

Adjustment

Tests:

Measurements

Power

Measurements

Power,

Frequency,

4-1

4-3 4-5 4-7 4-7 4-9 4-9 4-11 4-13

4-15 4-15 4-15 4-16 4-19 4-21

AM

Modulation

AM

Modulation

Analyzer

IF Community Wire Line Remote Base Wire Line

Phone Transmit Receive Line Measuring Levels Across A Balanced Generating

Bandpass Cavity Cavity & Duplexer Tuning; Bandpass

Passband Adjustment Adjustment

Test 4-23 Linearity Test 4-24

DISPLAY

Repeater

Modulation

Remote

Base;

Phone

Line Levels 4-30

Line

Input

Lin~

Signals Across A Balanced Line 4-34

Tuning

Adjustment

of

Reject

Notch

On

Receive Leg 4-40

On

Transmit

Leg 4-42

4-25 4-26 4-28

4-30 4-30 4-32

4-36 4-38 4-38

Desensitization Test: In-Service Duplexer 4-44 Ferrite Service Request

Isolator

Test 4-46

Form

4-49

~

X

LIST

OF

ILLUSTRATIONS

Figure

Communications System Analyzer R-2001D

1-1

Communications System Analyzer R-2001D Typical Packaging -

1-2

Communications System Analyzer

2-1

Front

Panel Controls, Indicators,

and

Connectors 2-2 Rear Panel 3-1

Power 3-2 Keypad 3-3

Cathode 3-4 Function Section 3-5

CW 3-6

AM 3-7

SSB Display 3-8

SWP

3-9

Modulation Section 3-10 Display Modes 3-11

RF Section

3-12

Generate Mode Metering Display

3-13 RF Scan Control 3-14

Monitor

3-15

Monitor

3-16 Modulation Display

3-17 Spectrum Analyzer Display 3-18 Duplex Generator Section 3-19

Duplex 3-20 RF Memory Display 3-21

Signaling Sequence Menu Display 3-22

Private Line Decode Display 3-23

DPL 3-24

Two

3-25

516

3-26

5/ 6 3-27 Select V Encode Display 3-28

Select V Decode Display

3-29 General Encode Display

3-30

General Decode Display

3-31

IMTS Mobile Originated Display

3-32

IMTS Base Originated Display 3-33 MTS Mobile Telephone Display 3-34

2805 Base Originated Display

Controls

Ray

Tube

Display Screen

Display Display

Display

Mode Metering Display

Section

Generator

Decode Display

Tone

(A/

Tone

Encode Display

Tone

Decode Display

Display

B)

Encode Display

Page

iii

1-1

1-3

2-1 2-9

3-1 3-1 3-2

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

3-11 3-12 3-13 3-13 3-13 3-14 3-14 3-15

3-15 3-15 3-16 3-16 3-16 3-17

Figure Page

3-35 Frequency 3-36 AC DVM Display 3-37 DC DVM Display 3-38 Distortion Analyzer Display 3-39

External Wattmeter Display

3-40

Oscilloscope Section

3-41

Destructive RAM Test

3-42

Non-volatile RAM 3-43 Checkerboard 3-44

Non Destructive RAM Test 3-45

Checksum

4-1

12

DB SINAO Test Setup 4-2 20 DB Quieting 4-3 Squelch Sensitivity Test Setup 4-4

Audio Frequency Response;

EIA

4-5

Probe 4-6 Frequency 4-7

Transmitter Tests Setup 4-8 Transmitter Test Setup;

Power

4-9

Audio 4-10

Audio Frequency Response Setup 4-11

Audio

EIA

4-12

AM Modulation Test Setup 4-13

AM Modulation Linearity Test Setup

4-14

Analyzer

4-15

Community

4-16

Modulation Setup; Remote Base

4-17

Phone

4-18

BALUN Setup; Measuring Levels

4-19

BALUN Setup; Generating Signals

4-20 Bandpass Cavities Setup 4-21

Duplexer

4-22

Duplexer Adjustment Setup;

Reject Notch

4-23

Duplexer

Reject Notch

4-24

Desensitization Test Setup

4-25

Ferrite Isolator Test Setup

Counter

Error

Standard

Setup

Adjustment

Measurements

Distortion Setup Frequency Response;

Standard

IF

DISPLAY

Repeater Modulation Setup

Line Levels Setup

Passband

Adjustment

Display

Error

Pattern

Screen

RS-204C

RS-152B

Adjustment

On

Receive Leg

On

Transmit

Error

Screen

and

Setup

Setup;

Screen

Error

Display

Setup

Leg

3-17

3-18 3-18 3-19 3-19 3-20 3-21 3-21 3-21 3-22 3-22

4-2 4-4 4-6

4-8 4-10 4-12 4-14

4-17 4-18 4-20

4-21 4-22 4-24 4-25 4-27 4-29 4-31 4-33 4-35 4-37 4-39

4-41

4-43 4-45 4-47

xi

LIST

OF

TABLES

~

Table

2-1 3-1 3-2 3-3 3-4 3-5 3-6

Controls, Indicators, Modulation RF

Output Special Function Audio Valid Valid

/ Function Availability Level At

Control

Filter Characteristics

PL

Codes

DPL

Codes

and

Connectors

Antenna

Codes

Port

Page

2-2

3-3 & 3-4

3-4 3-7 3-9 3-12 3-13

Table

Cap

3-7 3-8 3-9 3-10 3-11

3-12

Codes Select V Sequence Specification IMTS

Error

Messages

Tone

B Functions

Valid

Input

Frequency Versus

Display Resolution

External

Wattmeter

Elements

Page

3-14 3-14 3-16 3-17

3-18 3-19

r--.....

xii

/'...

LIST OF ABBREVIATIONS

A

AC AM ANT AST ATTEN AUTO

BALUN BAT

or BFO BNC B.O. B.O.S.

BW

c

Cal CCIR

C&E

em CMOS

CONN Cont CRT

cw

dB dBc dBm DC Demod DEY DISC Dispr DIST Div Dly DPL

Dplx DSBSC DVM

E/D EEA EIA Ext

FM FREQ FWD

Batt

Ampere Alternating Amplitude Antenna Analog

Attenuation Automatic

Balanced-to-unbalanced Battery Beat Frequency Oscillator Bayonnet Type Base Originated Behorden Organisationen mit Sicherheitsaufgaben, (a tion) Bandwidth

Celsius Calibrate

International Radio Consultative Committee Communications Motorola) Centimeters Complementary ductor Connect Continuous Cathode Continuous

Decibel Decibel (referred to carrier) Decibel (referred to Direct Demodulation Deviation Disconnect Dispersion Distortion Division Delay Digital tered Duplex Double Sideband Suppressed Carrier Digital Voltmeter

Encode/Decode Electronic Engineering Association Electronics Industry Association External

Frequency Frequency Forward

Current

Modulation

Synthesizer Tuning

Connector

German

and

Metal Oxide Semicon-

Ray

Tube

Wave

lmW

Current

Private

trademark)

Line, (a

Modulation

Standards

Electronics

into 50 ohms)

Motorola

Associa-

(part

regis-

of

xiii

GEN GHz

Horiz HPFL HS Hz

IC

lD

IDC

IEEE

IF IM IMTS

ln.

l/0

Kohm kg KHz

LED LPFL

Lvl

MAX

MHz MIC MIN M.O. MOD MOD. MON us

ms

MSEC Mtr MTS MV

or

uV

mW

NA

or NB NEG No .

#

ORIG

PCT PL

PN

POS

or

mic

Mon

mV

N/ A

Generate Gigahertz

Horizontal High Pass Filter High Stability Hertz

Integrated Circuit Identification Instantaneous

Institute Engineers Intermediate Frequency

Intermodulation

Improved Mobile Telephone System

Inches

Input/Output

Kilohm

Kilograms

Kilohertz

Light-Emitting Diode

Low Pass Filter

Level

Maximum

Megahertz

Microphone

Minimum

Mobile Originated

Modulation

Modified

Monitor

Microsecond

Millisecond

Metering

Mobile Telephone System

Millivolts

Microvolts

Milliwatt

Not Applicable

Narrow

Negative

Number

Originated

Percent

Private Line, a

mark

Part

Number

Position

Number

Deviation

of

Electrical

Bandwidth

Motorola

Control

and

Electronics

registered trade-

~

pos

+I-

R Resistor REF REV RF RMS

or

rms Rptr RS Receiver Specification

SEC

or

sec Second SEL Select VAC Volts Alternating SENS SEQ

or

seq

Sig Signal

AD

SIN SSB

STD

sw

SWP syncs

Positive Plus

or

minus

Reference Reverse Radio Frequency Root- Mean-Square Repeater

Sensitivity VCE Voice Sequence VDC

Signal

Ratio

of

Single Sideband Standard Switch Sweep Synchronizes

+Noise+

Noise+

Distortion

TCXO

I

TEL Temp TN Trig Trigger TX

UHF UUT

I

v

Vert Vertical VRMS Volts (root-mean-square) VSWR

w

WB Wide Bandwidth

I

XY

Temperature lator Telephone Temperature Tone

Transmitter

Ultra High Frequency Unit

Volts

Volts Direct

Voltage Standing Wave Ratio

Watts

(Select Any Valid Number)

I

ZVEI Zentral-Verband der Elektro-Industrie, (a

German

Compensated

Under

Test

Current

Electronics Industry Association)

Crystal Oscil-

Current

,--.......

xiv

~

/

SECTION 1

INTRODUCTION

1.1

SCOPE

This ble

Communications in figure 1-1. and and shop

1.2 SERVICE

Motorola test

equipment tions Sector. equipment service warranty tured by repairs forms basis Equipment at

(312) 576-7025 in Illinois. Frequently, direction troubleshoots The

Center

OF MANUAL

manual

functions for the technician

service

and

at

contains

The

Analyzer

radio

communications

in the field.

Test

Equipment

supplied by

The

Center

replacement parts

information.

repairs.

Motorola,

under

out-of-warranty

competitive rates.

of

then ships

For

the Center's direction.

Service

Center,

the

Center

equipment

information

System Analyzer

incorporates

Service Centers service all the

maintains

and

The

Center

some

equipment,

the original supplier

repairs

Contact

toll free

via telephone, a technician

to

isolate a defective module. l

an

exchange

for using

R-20010

many

to

completely

equipment

Motorola

a complete library

on

a time

module

v"rr

Communica-

a stock

performs

the

at

of

not

The

Center

and

Motorola

(800) 323-6967

under

immediat

.

JF

),

¥

I~

JJ!1'

MOTOROLA TEST EQUIPMENT SERVICE CENTERS

the

porta-

shown

devices

monitor

in the

original

of

most

in-

manufac-

performs

per-

materials

Test

or

the

E~Y;i

I •

['

··v

t/GI

~

Jl

MOTOROLA Test 1313 E. Schaumburg, Phone: Phone: MAMS: TTY: 910-693-0869

MOTOROLA Test 2333 B. El Segundo, Phone:

MOTOROLA Hawaii Service 99-1180 I Aiea, Phone: TTY: 63212

~t.,

C & E

Equipment

Algonquin

800-323-6967 312-576-7025 (Illinois) NAGOU

Equipment

Utah

213-536-0784

waena

HI

800-487-0033

;;(( . l'1'

~,;

~0~

. , \

f/;

I .j'

IL

CA

96701

,)

rv

Service

Rd.

60196 •

WEST

Service

Ave.

90245

C &

E,

Center

St.

t0 1·

'(~~

11.io

'1

'fv~

PARTS

Center

,/

COAST

Center

INC.

r

/·

v

~

·/

0.

-:J

Ctur

1"'~-:Jt

(/

t1

T1'

' v I

\Tt

·

,

L/

J

tJ

~

1'-.,.

~~

_cQ

ci);::-,

//

f./')

-~1

?

tj/1;/

_

......_/

maail

liD

II

mama

-

FIGURE

COMMUNICATIONS SYSTEM ANALYZER R-20010

1-1.

1-1

(

..

. ,.

•

..

e

•Untft.•(

.

~

....

• s

...... ,.

. '

·~-·

_ ,

·

c ~

~

•••. ()10, ...

• r-A

e

•o>W•

.

,_,.

.

·

-~

__

MOTOROLA TEST EQUIPMENT SERVICE CENTERS

MOTOROLA AREA PARTS OFFICES

MOTOROLA AUSTRALIA PTY. LTD.

Test Equipment Service Center

666 Wellington Rd. Mulgrave, VIC 3170 Melbourne Phone: 3-561-3555 Telex: 32516 MOTOCOMA AA Cable: MOTOCOM MELBOURNE MAMS: FEMEL

MOTOROLA CANADA, LTD. Test Equipment Service Center 3420 Pharmacy Ave. Unit

11 Scarborough, Ontario MIW 2P7 Phone: 416-499-1441 TTY: 610-492-2713 MAMS: NAWIL

MOTOROLA FRANCE S.A. Test Equipment Service Center Zone Industrielle de la Petite

Montagne Sud 14

Allee du Cantal CE

1455

F-91020 Evry Cedex

Phone:

(6)

07779025 Telex: 600434F MOTEV MAMS: FAFEV

MOTOROLA GmbH

F and

V.

ABT. Frachtzentrum FZF 6000 Frankfurt Main/ Flughafen West Germany Attn: METEC

Phone:

Telex:

(0)

6128-702130

(0)

4182761

MOT D

MOTOROLA SOUTH AFRICA (PTY.) LTD. Motorola House 5th St. P

.0.

Box 39586 Wynberg Phone: 011-786-6165

Telex: 422-070-SA Cable: MOTOROLA JOHANNESBURG MAMS: FESAF

1.3 REPLACEMENT PARTS ORDERS Send orders for replacement parts to the nearest

Motorola Area Parts Office

Be

Center.

sure to include the complete identification

or

Test Equipment Service

number located on the equipment. Direct inquiries to the Area Parts Office including requests for part number identification and test equipment calibration or

repair.

MOTOROLA AREA PARTS OFFICES

MOTOROLA C

1313

E. Algonquin Rd.

& E PARTS

Schaumburg, IL 60196 Phone: 800-323-6967

312-576-3900

EASTERN AREA PARTS 85

Harristown Rd.

Glenrock, NJ 07452

Phone: 201-444-9662

TWX: 710-988-5602 EAST CENTRAL AREA PARTS

12995

Snow Rd.

OH

Parma,

44130 Phone: 216-433-1560 TWX: 810-421-8845

GULF STATES AREA PARTS

1140

Cypress Station

P.O. Box

73115

Houston, TX 77090 Phone: 713-537-3636 TWX: 910-881-6392

MID-ATLANTIC AREA PARTS 7230 Parkway Drive

Hanover, Maryland 20176

Phone: 301-796-8763 TWX: 710-862-1941

MIDWEST AREA PARTS

1313

E. Algonquin Rd. Schaumburg, IL 60196 Phone: 312-576-7430 TWX: 910-693-0869

PACIFIC SOUTHWESTERN AREA PARTS

P.O.

Box 85036 San Diego, CA 92138 Phone: 714-578-8030 TWX: 910-335-1516

SOUTHEASTERN AREA PARTS P.O. Box Decatur, GA

368

30031 Phone: 504-987-2232 TWX: 810-766-0876

SOUTHWESTERN AREA PARTS P

.0.

Box 34290 3320 Belt Line Rd. Dallas, TX 75234 Phone: 214-620-8511 TWX: 910-860-5505

WESTERN AREA PARTS

1170 Chess Drive, Foster City

San Mateo,

CA

94404 Phone: 415-349-8621 TWX: 910-375-3877

MOTOROLA CANADA LTD. National Parts Department 3125

Steeles Ave., East Willowdale, Ontario M2H 2H6 Phone: 416-499-1441 TWX: 610-491-1032 Telex: 06-526258

r--.....

~

1-2

..-...

ALL OTHER COUNTRIES:

MOTOROLA INC. International Parts Dept. Schaumburg, IL 60196 U.S.A. Phone: 312-576-6482 TWX: 910-693-0869

1-2,

722443

the unit

is

then packed

in

a larger container

Telex:

Cable: MOTOL PARTS

1.4 INSTALLATION

• PACKING Foam pieces protect the Communications System

Analyzer packed inside a fiberboard carton. As shown figure for additional protection. Save the packing containers and materials for future use.

0

~~

in

propriate connector on the Analyzer's rear panel. Connect the cord's other end to the power source. For AC, use a grounded 3-wire 100-130 V AC or 200-260 V AC power source. On the back panel's two-position LINE

110

switch, select either the LINE switch, R-2001D/220 or R-2002D/220 V AC and fuse for operation.

OPERATION

110/220 VAC

Remove accessories from the cover as needed. Insert the whip antenna into the Antenna port located in the Duplex Generator section Antenna control located in the RF SECTION. Turn POWER switch, located on the front panel, to the On position. When the Oven Ready indicator illuminates, the frequency standard stabilizes and the Analyzer ready for use instantaneously (with standard TCXO). Before operating the Analyzer, carefully study the function and purpose familiar with the operating procedures described in this manual.

will

have a 3.0A fuse installed. Install a 3A

110

VAC operation and a

12

VDC

or 220 position. The factory sets

as

ordered. Units ordered as

will

be pre-set for

lOA

fuse for DC

FUSE

3A

lOA

of

each control and feature. Become

CAUTION

PART NUMBER

65-20404 65-10266

the front panel. Pull the

220

is

FIGURE 1-2. TYPICAL PACKAGING-

COMMUNICATIONS SYSTEM ANALYZER

• INITIAL SET -UP Place the Analyzer on a workbench in the shop or

mobile repair unit. Lower the bail underneath to raise the Analyzer for easier viewing. Open the two latches on

of

the bottom side to separate the hinges. Remove the front cover. Take the power cord (AC or DC) that cover. Attach the cord's female connector to the ap-

the cover, lift and slide the cover to the

is

stored in the

When installing the Analyzer in a vehicle, fuse the DC supply line close to the vehicle's battery. The DC-lOA fuse, located on the Analyzer's rear panel, protects it against overload but does not protect the vehicle.

• BATTERY PACK Attach the battery pack to the Analyzer's rear panel

with 2 clips and 2 screws. Align and slide the pack's mounting clips into the slots on the mounting brackets on the left side. Align the captive screws with the mounting holes on the right side and tighten them. Connect the power plug to the connector at the top right the rear panel.

• TRACE ROTATION ADJUSTMENT Set DISPLAY to Gen/Mon Mtr. Adjust intensity and

focus control to obtain a comfortable viewing brightness. Remove the fine screws from the Analyzer's

rear panel and remove the top panel. To re-align a tilting display screen, locate R-88 the third potentiometer located on the A-2 module behind the front panel. Insert the tuning tool in the resistor and slowly

of

rotate it while observing the front the tool until the bargraph line horizontal graticule line. Replace the panels and tighten the screws.

the screen. Rotate

is

parallel with the center

of

1-3

• ACCESSORIES

SUPPLIED

FRONT COVER - The front cover protects the front panel and its components during transit or while the Analyzer

is

not in use. The front cover stores the power

cord, antenna, cables, and other equipment needed for

PN

on-site servicing.

# 15-80335A 70.

ANTENNA - The fused BNC connected antenna receives off-the-air signals.

BNC to Type N Adapter. DC

POWER

CONNECTOR KIT.

In-Line Wattmeter Adapter.

PN

#TEKA-24A.

PN

#58-84300A98.

PN

#RTL-4055B.

PN

#RPX-4097A.

• MODEL OPTIONS

• Cellular Test Functions - Model R-2008D provides capability in one test instrument for servicing traditional FM communications and, with the cellular option, the new cellular radio systems:

•

CELL-

TO-MOBILE

SIGNALING

ACCEP-

TANCE TESTS

• MOBILE-TO

CELL

SIGNALING

ACCEP-

TANCE TESTS

• AUTOMATIC RF TESTS

• MANUALLY SELECTED RF TESTS.

MANUAL - The Operator's Manual contains descriptions and instructions for properly using the Analyzer. PN

#68P81069A66-0.

Oscilloscope

& Meter Probe - A probe (x1), with

attachments, provides general servicing needs. PN

#RTL-4058A.

POWER

CORD - The three-conductor cord powers the Analyzer by AC and charges the optional battery pack. Its right-angle design allows the Analyzer to stand

PN

#30

on end.

-80336A36.

SUN SHADE - Snap the Sun Shade over the CRT screen to observe displays even in bright sunlight.

PN

#15-80335A55. TEST MICROPHONE. PN #RTM-4000B. 12

VDC POWER CONNECTOR KIT.

•

OPTIONAL

ACCESSORIES

PN

#RPX-4097A.

BATTERY PACK - A 13.6 volt battery attaches directly to the back of

continuous operation. Built-in circuitry charges the battery when the power switch tion.

If

battery power falls below

of

the Analyzer to provide

is

in

Off

11

volts, a warning ap-

50

minutes

or Standby posi-

pears on the CRT. The battery can be installed in the field

but

it cannot be used in conjunction with IEEE-448

Interface Bus or Blower. DELUXE TELESCOPING ANTENNA.

PN

#RTP-1002A.

PN

#RT A-

4000A. 600

OHM

Use for

LINE

MATCHING

600

ohm balanced lines.

TRANSFORMER PN

#RTL-1003A.

PROTECTIVE CANVAS COVER - A rugged, padded

fabric cover protects the Analyzer from excessive field

wear.

PN

#RTL-4056B.

• High Stability (HS) Oscillator - Use this oscillator to improve stability over the standard TCXO time base to temperature range

+1-5 x 10-s maximum error, over the

of

0 to 55°C. A front panel LED (Oven Ready) indicates when the ovenized crystal has stabilized .

MODELS (See Specifications) R-2001D Basic Model R-2001D/ HS R-2001D/ HS/220 R-2002D/ HS R-2002D/ HS/220 R-2008D/ HS R-2008D/ HS/220 R-2009D/HS

R-2009D/ HS/220

• IEEE-488 STANDARD INTERFACE BUS This option enables using the Analyzer as a program-

mable measurement instrument. alyzer Model R-2002D

when combined with the suit-

For

example, An-

able programmable controller and applications software becomes the heart tem. Control or monitor all

of

an automated RF test sys-

of

the Analyzer's functions via the IEEE Bus. Perform full sequential test routines, quickly and repetitively, with little operator interaction.

• MODULE SERVICE KIT The Extender Board Kit aids servicing the Analyzer's

modules with printed circuit board edges. Use with A2, A3, A4, A5, A6, A7, A9, and A12 modules. PN

#RPX-4379A.

RF DETECTOR PROBE. TRANSIT CASE.

PN

#RTL-4065A.

PN

#RTL-4075A.

I

~

,...

1-4

SECTION 2

DESCRIPTION

COMMUNiCA

TIO

NS

SYSH~ A~

JI\'1[11

a a a a

II

BElli

dB

maaa

11(;~·1

•

'"h'P

,.,

..

>I)

Dt'>O•

Swt>t•p

1

j

POWER

•

8.)\1

AC

(.,

o,e,.,

RF SCiJ"l

On

Stitnlltl'f

Oc:Oif

Ae.~d,.

DISPL AY

•

Gen

MooMI!

e

Modvi;)!IOn

8

Spec!

An,ttyltor

(J

Duple:.:

Gen

8

AF

Memor~

• Stqnahrtg Seq

8 F

rt>q

Counter

DVM

DIST

8

E.~et

Wo~~umerer

•

IF

e

ScopeAC

•

ScopeOC

Genf:'J;)If'

Mon•tor

FM

• cw

AM

•

• SSB DSB

• SWP 1 tOMHz

0 SWP 01-1

SC

MHz

M.ODULA

~

r

I

Cod•

0

()

Pl DPLinv

•

8

Tonr.A

•

Tone

• Tone SPq Tone

•

Syn!h

~~·

Bwst

Mode

L OPi.

B

Remotf'

'-"

2.0 DESCRIPTION The R-20010 Communication System Analyzer shown in figure 2-1,

service radio communications equipment over the frequency range trols, indicators, connectors and their functions. The Analyzer generates signals, measures modulation and frequency errors, and performs a variety

---~.J

FIGURE 2-1. FRONT

of

tests normally associated with the following devices:

I

MH•

1<111

Vert

DVM

PANEL

Vert

Sm.td

Counter

CONTROLS, INDICATORS, AND CONNECTORS.

E1tV

O•sl

1r1

OSCILLOSCOPE

Hortz

of

Spectrum analyzer Duplex offset generator Modulation oscilloscope Frequency counter AC/ DC digital-analog voltmeter RF wattmeter General purpose oscilloscope Multimode code synthesizer Sweep generator Signaling encoder

I decoder

Signal strength meter Automatic scan latch counter.

1!11

----.._

_____

MONITOR

is

a portable test instrument designed to monitor and

1 MHz to 1 GHz. Table

---.,.___,

2-1

lists the Analyzer's con-

ma

E•tlevel

~

2-1

TABLE

2-1.

CONTROLS,

INDICATORS,

AND

CONNECTORS

ITEM

Power

Batt indicator

AC indicator

Oven Ready indicator

KEYPAD

DESCRIPTION

FRONT

Three-position toggle switch

LED (red)

Twelve-key pushbutton keypad

FUNCTION

PANEL

(figure 2-1)

On position energizes all circuitry.

Standby position removes DC from all circuitry except the

frequency standard and battery charger.

At off, the battery charges if equipment AC

power source.

Illuminates when equipment uses DC power.

Illuminates when equipment source. Position dicator. Equipment automatically switches to AC power source when connected to AC line voltage.

Illuminates when optional frequency standard oven has stabilized. Continuously illuminated with the TCXO frequency standard.

Enters variables into microprocessor memory and onto CRT screen, selects variables from the memory for display, changes previous entries.

of

POWER switch has no effect on in-

is

connected to an AC power

is

connected to an

~

...

~

0 through 9

CRT

• Intensity

o Focus

Dispr / Sweep Control

Line cursor key

Horizontal cursor key

Numerical keys

Cathode Ray Tube

Stacked concentric potentiometers: Small center knob

Large outside knob

Potentiometer

Moves the cursor down only to the next available line on the screen, skips preset permanent entries, from the last line it returns to the top line.

Moves the horizontal cursor left to the next available position that may be changed. From the last left position, the cursor moves to the far right with the next entry.

Enter a value directly or select a value stored in the memory.

8 em x monitored, in both analog and digital form. Also displays all control settings and numerical values, entered or preset.

Controls display intensity.

Controls display focus.

Controls the frequency span (1-10 MHz) during Spectrum Analyzer DISPLAY . Provides sweep width control during SWP FUNCTION (0.01-1 MHz

10

em screen displays all functions, generated or

or

1-10

MHz).

RF Scan Control

Analog Synthesizer Tuning Manually scan any displayed frequency by rotating this

(AST) control clockwise or counterclockwise

quency steps per revolution. Position termines step size.

2-2

at

the rate

of

display cursor de-

of

32

fre-

~

TABLE 2-1. CONTROLS, INDICATORS,

AND

CONNECTORS

ITEM

DISPLAY indicators

DESCRIPTION FUNCTION

FRONT

Twelve LED's

PANEL

Illuminate one

(figure 2-1)

at

a time to indicate the function or type operation the equipment the CRT. Select by pressing one DISPLAY section .

1.

Gen/ Mon Mtr - In generate mode, the CRT displays center frequency, output power, and RF output modulation depth. In monitor mode, the CRT displays center frequency, input power, frequency error, and received carrier modulation depth.

2.

Modulation - The CRT displays modulation audio

in generate mode mode.

3. Spectrum Analyzer - CRT displays the RF spectrum and operating center frequency. Use the Spectrum Analyzer to identify interference, trace RF and IF signals, measure transmitter harmonics, check spurious response and receiver local oscillator radiation.

is

performing and displaying on

of

the arrow keys under the

or

demodulated audio in monitor

of

.

:......___./

4.

Duplex Gen - CRT displays duplex generate frequency and modulation depth on the generator output or monitor frequency and modulation depth on the received carrier. FUNCTION switch position selects the reading. In this mode, the Analyzer simultaneously generates and receives signals for duplex radio servicing. The Duplex Generator provides enhanced capability to service equipment such as

repeaters, car telephones and emergency medical

telemetry portables.

5.

RF Memory - Stores and displays programmable

of

32

frequencies and codes up to a total

6.

Signaling Sequence - Simulates encode and decode

entries.

tone sequence for all code synthesizer modes. Press an arrow key in the Modulation section to select one of

the

six

modes. Encode in generate function and

decode in monitor function.

7.

Frequency Counter - Measures

10Hz

to

35

MHz puts in either generate or monitor function. In monitor function, measure transmitted carrier frequency and other signals less than

35

MHz. Use the

frequency counter to measure and set offset oscilla-

tors, pager IF's,

PL

frequencies, and other external

input signals .

in-

2-3

TABLE 2-1. CONTROLS, INDICATORS, AND CONNECTORS

ITEM

DESCRIPTION FUNCTION

FRONT

PANEL

(figure 2-1)

8.

DVM/ DIST a. DVM - The digital voltmeter displays AC/ DC

voltage readings (digital and analog) with the corresponding dBm value on the CRT screen, in either generate or monitor function. Select AC or DC with the display cursor and keypad. The screen displays battery voltage and a signal's true RMS at the front panel DVM jack. Use the meter to check and set power supply voltage, bias level, and audio level.

b.

DISTORTION-

This mode automatically measures fixed frequency EIA Sinad/ Distortion (signal to noise and distortion ratio). The Analyzer generates a 1 KHz tone

of

Measure distortion

AM or FM transmitter modulation. Use the distortion meter for a comprehensive check

of

a receiver's performance.

9. Ext Wattmeter - Select the element and the screen displays the forward and reflected power passed through that element mounted in the RTL-4055 wattmeter adapter.

10. IF

- The screen displays the the monitor receiver for AM and ing.

of

known quality.

700KHz

SSB

,..--,

~

IF signal from

receiver servic-

FUNCTION switch

FUNCTION indicators

Two-position toggle switch

Six LED's (red)

11.

Scope AC - The screen displays the voltage wave-

form applied to the vertical input (AC coupled).

12

. Scope DC - The screen displays the voltage wave-

form applied to the vertical input (DC coupled).

Select either generate or monitor function.

1.

Generate - The equipment generates and outputs an RF signal.

2.

Monitor - The equipment monitors input signals with the input terminated into the receive mixer. Use this position for off-the-air monitoring.

Indicates the mode erate or monitor. Select by pressing one

of

signal the equipment

is

set up to gen-

of

the arrow keys

under the FUNCTION section.

1.

FM - Equipment generates or monitors frequency

modulated signals.

2.

CW - Equipment generates an unmodulated RF

signal (continuous wave). Monitor position provides

only frequency error measurement.

~

2-4

TABLE 2-1. CONTROLS, INDICATORS, AND CONNECTORS

ITEM

/

DESCRIPTION FUNCTION

FRONT

PANEL

(figure 2-1)

3.

AM

- Equipment generates

or

monitors amplitude

modulated signals.

4.

SSB/ DSBSC - Single Side Band / Double Side Band Suppressed Carrier signal. signal

is

not

calibrated. Use it only for relative meas-

The

level

of

the generated

urements . Monitor SSB mode receives SSB signals with the use

5.

SWP signal having a sweep width trolled by the Dispr/ Sweep control.

1-10

of

the BFO.

MHz

- Equipment generates a swept RF of

1 to

10

Monitor

MHz, con-

position has no effect, equipment remains in generate mode.

6.

SWP

0.01-1

above except sweep width limits are 0.01

MHz

- Equipment performs as in 5. MHz

to

1

MHz.

MODULATION

switch Three-position toggle

Controls the Code Synthesizer modulation source.

switch

1.

Coot

- Continuous modulation signal

output,

gen-

erates repetitive cycles.

2.

Off

- No modulation generated. Terminates code

sequences.

3. Burst - Generates a single cycle, spring loaded, returns to

a.

PL,

b.

DPL,

c. Tone Sequence

Off.

Tone

DPL

A, Tone B

Inv

Output switch

DPL as switch DPL switch

is

present as long as

is

held in Burst.

turn-off

code as long

is

code

output

is

moved position. Burst turn-off when switch Coot

Output

code

is

to

Off.

is

a single signaling

held down.

when

to

Coot

of

DPL

is

output

moved from

sequence.

d. Tone Remote

Output cess sequence; leaves A

is

a tone remote ac-

at

a low level for trans-

Tone

mit-type commands until the switch

is

returned to

Off.

2-5

il

TABLE 2-1. CONTROLS, INDICATORS,

AND

CONNECTORS

ITEM

Code Synth Mode indicators

DESCRIPTION

Six LED's (red)

FRONT

FUNCTION

PANEL

(figure 2-1)

When illuminated, it indicates the code synthesizer mode selected. Select by pressing one MODULATION code from the keypad on the select from the RF Memory display.

I.

PLIDPL PL

KHz

DPL Maximum code number

7.

2.

PLIDPL PL

- same as above DPL Line code. Maximum code number

may exceed 7.

3. Tone A indicator illuminates when Tone A output.

for

keypad on the Tone Memory display.

section. Enter the

indicator

- Selected Private Line frequency

- Selected Digital Private Line code output.

Inv indicator

- Inverted

Enter Tone A & B frequencies from the

output

of

the arrow keys under the

PL

frequency

Gen/Mon

is

777. No digit may exceed

of

selected Digital l>rivate

Mtr display

output

is

777. No digit

or

is

selected

DPL

or

to

DISPLAY select

switches

Two-pushbutton switches

•

...

FUNCTION switches

Code Synth Mode select Two-pushbutton switches switches

select Two-pushbutton switches

is

4. Tone B indicator illuminates when Tone B

for output.

5.

Tone Sequence indicator illuminates when the is

a tone signaling sequence. Select the sequence

the Tone Memory display.

6.

Tone

Remote indicator illuminates when the

is

the sequence for a remote station. Set A for guard;

Tone

set B for command tone on

Selects the function to be displayed by the equipment, as indicated by the DISPLAY LED's .

1.

- moves the selection up one step

- moves the selection down one step

2.

or

mode

of

Selects the type

or

ate Operates the same way as the DISPLAY select switches.

Selects the Code Synthesizer the Code Synth Mode LED's. Operates the same way as the DISPLAY select switches.

monitor as indicated by the

signal the equipment will gener-

output

memory display.

at

FUNCTION

mode as indicated by

selected

a time.

at

a time.

LED's.

output

on

output

r---

Code Synth Lvl control Potentiometer

Controls the level MOD

Output.

2-6

of

Code Synthesizer for modulation

or

~

TABLE 2-1. CONTROLS, INDICATORS,

AND

CONNECTORS

,...

ITEM

Ext Level control

1 KHz Level control

Mic connector

Mod

Ext

Mod

MONITOR

In connector

Out

connector

section:

Volume control

DESCRIPTION

FRONT

Potentiometer /switch

4-pin connector

Pre-emphasis and IDC are used

BNC connector

Potentiometer

FUNCTION

PANEL

(figure 2-1)

Controls modulation level

of

external input (microphone and other external generators). Switch at full counterclockwise position disables external modulation inputs.

Internal 1 KHz tone modulation level control. Switch counterclockwise position disables 1 KHz modulation tone.

Microphone input. Provides microphone bias and TO

TALK (GENERATE) connection to equipment. Uses

or

RTM-4000 microphone

handset.

External modulation signal input.

Output

connector for all modulation signals (all signals

combined).

Controls speaker

output

level.

at

full

PUSH

BW switch

BFO control

Sig Lvl indicator

Squelch control

lmage/Dplx toggle switch

Demod

Out

connector

Two-position toggle switch

Potentiometer

I switch

LED (red)

Potentiometer

Two-position switch

BNC connector

In monitor mode, selects IF bandwidth. Wide KHz mod acceptance. Narrow BW

is

±5KHz

BW

is ± 100

mod accep-

tance. In Gen, FM mode selects modulation range: 0-100

or

KHz deviation in WB

BFO tion.

on/off

To

and

beat frequency control for sideband recep-

minimize interference,

0-25 KHz in NB.

turn

off

the BFO when not

in use.

Squelch indicator.

Adjusts squelch threshold level, full counterclockwise position disables squelch.

NOTE: Monitor sensitivity

level use) as the control

is

greatly decreased (for high-

is

increased clockwise beyond the

quieting point.

In duplex generation mode, controls the duplex frequency output

for above (High)

or

below (Low) the receive pro-

grammed frequency. In monitor mode it selects the fre-

quency

of

the local oscillator injection above

or

below the programmed monitor frequency to remove image interference.

Receiver audio output.

2-7

TABLE 2-1. CONTROLS, INDICATORS,

AND

CONNECTORS

ITEM

OSCILLOSCOPE

Horiz

switch

Horiz

Ext

vernier

Horiz

control

Trig Level

section:

DESCRIPTION

FRONT

Seven-position

rotary

switch

Potentiometer

BNC

connector

Stacked concentric potentiometer

and

switch

FUNCTION

PANEL

(figure 2-1)

When in the oscilloscope

sweep

rate

or

Horizontal

gain vernier.

external

sweep

Calibrated

rate

horizontal

vernier

position

mode,

or

is

selects the

input.

external

horizontal

fully clockwise.

Allows external horizontal inputs for oscilloscope. High input

impedance.

Selects oscilloscope trigger level

knob

selects the level trols the trigger with

no

vertical

mal

position,

syncs

on

vertical

of

trigger. Outside (largest)

mode.

In

Auto

input

signal, syncs

no

sweep unless vertical

input.

and

trigger

position,

on

vertical

mode.

continuous

input

CAUTION

horizontal

input

Center

knob

con-

sweep

input.

Nor-

is present,

~

-

Position

controls

• Vert

o

Horiz

Vert switch

Vert Vernier

control

Vert/Sinad/Dist DVM/Counter

connector

In

Concentric potentiometers

Center

(small)

Outside (large) knob

Four-position

Potentiometer

BNC

connector

control

knob

control

rotary

switch Oscilloscope

During prevents

Controls oscilloscope

Controls

Tone

Sequence

normal

the

position

mode,

operation

of

mode.

the vertical position

the

horizontal

operation

position

uses values the switch, indicating volts lation display switch, indicating switch also

Vernier gain the oscilloscope

mode

range

controls

control

uses values

Frequency

for vertical inputs

mode.

clockwise.

Signal

input

to

the

equipment

(one

megohm

1.

External

input

impedance):

vertical for oscilloscope

entering a scope trigger delay

of

scope triggering.

the

CRT

display, when in

of

the

CRT

display

of

the

CRT

display

marked

per

division

marked

for calibrated

Counter

Calibrated

for

the

to

on

the

CRT.

to

the left

FM

deviation. This

sensitivity.

to

the

CRT

position is fully

following

operation

the right

Modu-

of

when

operations

the

of

the

in

~

2.

SINAD/Distortion

3. Digital Voltmeter

4. Frequency

2-8

Meter

~

Counter

TABLE 2-1. CONTROLS, INDICATORS, AND CONNECTORS

"-.___/

ITEM

RF SECTION:

In/Out

RF

RF Level Variable control

RF Level Step attenuator

Ext Wattmeter

DUPLEX

Output connector

connector

GEN switch

DESCRIPTION

FRONT PANEL (figure 2-1)

Type N connector

Potentiometer

14-position ganged attenuator and switch

Connector

Two-position toggle switch

BNC connector

FUNCTION

RF input in monitor mode, RF output in generate mode.

Vernier control Push for RF In / Out port. Exceeding the Am Limit marking

in AM generate mode may result in distorted output.

Ten

dB

per step control mode. Also serves monitor and spectrum analyzer modes.

Allows input from Motorola ST-1200 series inline wattmeter elements for measurement and CRT display ward and reflected transmitted power.

Select either On is

enabled with switch On.

Output connector for duplex generator output.

of

RF output level. Pull for antenna port.

of

RF output level in generate

as

RF input level step attenuator in

of

or

Off. Duplex output from DUPLEX port

for-

Antenna

Port

Fused BNC connector PN

#09-80378A51

/).Jt(.

f/V

I

f/

1

v,?~

r -"l{l

1

.A<l'

~P

..

!J~'·t

a,.

~ ' fv~"'

;

·o

'/

~~~~~

17

1

f~·

.c

ti'-IJ

vel'

~

J ,)JI' ,

Connector for the whip antenna.

FUSE REPLACEMENT PROCEDURE: Place a male BNC connector on the antenna port. Use a pair

of

slip-joint pliers to grab onto the knurled portion the male BNC connector. Turn counterclockwise to loosen. Unscrew the connector all the way, fuse

is

plugged into the female center pin. Use a needle-nose pliers to remove the defective fuse and replace it with a 0.10 A mini-fuse,

PN

#65-80377A61.

off

the front panel. The

of

FIGURE

2-2. REAR

2-9

PANEL

TABLE 2-1. CONTROLS, INDICATORS, AND CONNECTORS

ITEM

LINE power control

AC POWER

DC POWER

10

MHz STD

AC3A DC

lOA

FAN POWER

CELL BUS

DESCRIPTION

Recessed switch

Connector

BNC Connector

Line fuseholders

Connector

Bus connector

REAR PANEL (figure 2-2)

Select primary AC voltage, either

Primary AC power input.

Primary DC power input port and battery charger output.

Input/ Output for panel.

AC and DC line fuses:

OPERATION

110/220 VAC

12

VDC

Power connector for the cooling fan.

Placement installed (R-2008D).

of

FUNCTION

110

V or 220 V line.

10

MHz reference frequency. See bottom

FUSE

3A

10

A

l/0

connector when cellular service option

PART NUMBER

65-20404 65-10266

~

is

Frequency Standard

10

MHz control

Recessed switch

BOTTOM PANEL

Select either the internal external panel connector. This switch makes the rear panel port an output when operating from the internal standard or as an input otherwise.

10

MHz frequency standard or an

10

MHz source applied to the appropriate rear

10

r-...

MHz

2-10

~

SECTION 3

OPERATION

'-..___...~

3.0 OPERATION

•

GENERAL

The Communications System Analyzer

Connectors, controls, and indicators are conveniently and logically arranged in functional groups outlined in red on the front panel. The Analyzer incorporates many useful applications

the front panel. The appropriate section clearly explains these applications and how to access them by manipulating the keypad. The

organized presentation

volatile memory conveniently stores the

into the system by the operator.

warning messages

and minimize errors.

3.1 POWER SECTION

FIGURE 3-1.

• POWER

The Analyzer operates

100

to

130 capable the rear panel to select either

input from Motorola battery pack RTP-1002A convenient external battery source operates from to

Watts DC input. Refer to Section 1 installation instructions for the Motorola battery pack that

imately 50 minutes continuous operation. Figure shows a three-position toggle switch located to the right of Analyzer's power supply.

• ON

The energizes all circuitry except the battery charger.

• SELF-TEST

When the power switch performs an internal check

possible trouble.

\,_,_./

the course screen to indicate the nature some guidance for troubleshooting operation.

of

+

16

V,

attaches to the rear panel and provides approx-

the keypad

On,

is

easy to use .

that

are

not

evident by examining

of

this manual

CRT

displays an

of

measurement results. A non-

data

entered

The

system provides

and

audible alarms to ease operation

Oo

Standby

De Oil

• Ban

AC

O OvenReoddy

POWER

on

VAC

or

200 to 260 VAC,

115

Watts. Use the recessed LINE switch on

6.5 amps maximum, with not more than 90

on

the front panel and used to control the

or

full-up, position

is

If

the system detects an error, during

of

this self-test, a message displays

CONTROLS

AC

or

DC.

AC

can be either

47

Hz to

110

or

220 voltage. DC

of

this manual for

of

the toggle switch

first turned

of

its own circuits to detect

of

on,

the trouble

and/or

the Analyzer

and

continued

400Hz

or

any

+

11

3-1

on

the

provide

V

• SELF- TEST DISPLAY EXAMPLES:

REFER TO

ADDENDUM

AT

THE

OF THIS SECTION

PAGE

•

STANDBY

In Standby nected to AC power, the battery charger continues to operate and power is applied to the internal frequency standard.

•

DC

In the full-down position DC nected to operates .

• LED INDICATORS

AC LED indicator illuminates whenever AC power connected to the three-pin power connector panel. Batt (battery) LED indicator illuminates whenever DC power nector on the rear panel. AC illuminate together. The system switches automatically between AC and DC, with preference for AC if both are present. Oven Ready LED indicator illuminates automatically when the internal frequency standard has stabilized and the system

OFF

or

center position, if the line cord

AC

power, only the battery charging circuit

is

connected to the DC

is

11111111

IIIIEIEI

11111111

FIGURE 3-2.

• KEYPAD

The

keypad shown in figure 3-2 has a down arrow key to move the cursor vertically on the to move the cursor horizontally, number 0 to 9. When moved down, the cursor will move to the first allowable position to the left lower

data

3-1

entry area. allowable line when the down key will wrap the left key to move the cursor left to the next allowable position. the left key

around

If

to the uppermost allowable line. Press

the cursor

is

pressed, the cursor will wrap

If

is

at the most left position when

END

3-21

is

con-

Off,

if the line cord

POWER

and

DC

indicators never

ready to operate accurately.

-

KEYPAD

CRT,

a left

and

a key for each

the cursor

is

at

is

pressed, the cursor

around

is

on

the rear

arrow

on

the next

the lowest

to

con-

key

the

is

most right position numbered key

and

system bered key number on the screen, over which the display cursor set, with the number rectly places the decimal point. Use the keypad

input

frequencies, timing

onto

is

frequency for

on

the

same line. Select

to

enter numeric

the

CRT

display screen. When a num-

pressed the system replaces

on

the pressed key.

RF

and

information

The

IF

generators, private line

for paging systems, etc.

and

press a

into the

an

existing

system cor-

to

enter

attenuator reduce the input signal level load

is

in the 0 dB position. Use the

warning.

Gi>nerO'tt>

Mon

1tor

attenuator

and

thus remove the over-

to

MONITORFM

-77.3 DBM

-15

-99.9

-100

DEV

ALARM

CATHODE

CRT

•

DISPLAY

The

CRT merics, a movable cursor, information, CRT

continuously displays all functions, control set-

and

tings, both

analog autoranging digital readouts. Each line, calibration markers, ing the measured value. When the Analyzer into

another nent information. Use the dual control located lower right-hand corner sity

and Rotation display screen.

INPUT

ERROR

DEV

07.0 FIGURE

RAY

SCREEN

screen (figure 3-3) displays fixed alphanu-

and

system generated

measurements (generated

and

mode, the

focus

of

the display. See Section 1 for Trace

Adjustment

- -) 553.9999

LEVEL

KHZ

0

KHZ

0

KHZ

3-3.

TUBE

digital forms. Bargraphs aid the

DISPLAY

operator

and

intensified segment show-

CRT

instantly displays all perti-

of

the

CRT,

procedure

MHz

30.2 uV

+23.7

+

+99.9

+ 100

SCREEN

enterable numeric

data

or

monitored) in

bargraph

to

adjust

to

re-align a tilting

15

outputs.

has a base

is

switched

the inten-

•

lnlen'>•l\' Focu!r.

at

The

the

FM

•

cw

•

AM

• SSB OSBSC

•

SWP

1 ·10 MHZ

•

SWP 01-1

111m

FIGURE

3.2

FUNCTION

Figure 3-4 shows the front panel with the toggle switch (Generate selection keys -

LED's:

FM

cw

AM

SSB/ DSBSC

SWP

1-10

SWP

.01-1

MONITORCW

--.- DBM

-15

SECTION

up

MHz

3-4.

FUNCTION

or

down,

FREQUENCY

CONTINUOUS AMPLITUDE SINGLE SIDE

CARRIER SWEEP 1 MHz SWEEP

INPUT

ERROR

-

MHl

or

and

SIDE

BAND

0.01

LEVEL

KHZ

0

SECTION

FUNCTION Monitor), two

six modes with their

MODULATION

WAVE

MODULATION

BAND/DOUBLE

SUPPRESSED

to

10

MHz

to 1MHz

-)

101.1000

-

MHz

section

arrow

MHZ

---.-

-44

.

+

15

w

~

• SYSTEM The Analyzer provides protection against accidental ap-

plication BNC connector provides protection for the high level

generator

where the system mode, the application milliwatts switches the Analyzer from generate to

monitor transceiver, an audible alarm warns

ing appears tery power, measurements, audible alarm sounds when a preset deviation limit ceeded in plays for strong measurement error. input below

WARNINGS

of

high level energy into the

output

mode. When too much

monitor

on

the

levels below

-10

antenna

is

automatically in power

of

on

the

CRT.

Displays also warn

improp

RF

dBm

,er

attenuator

or

overheated

mode.

CRT

in place

input levels which could introduce

The

-40

dBm

at

the transceiver

RF

ports. A fused

port.

At

the transceiver

RF energy in excess

RF

is

applied to the

and

a visual warn-

of

setting for particular

RF

load. A continuous

An

RF

overload warning dis-

of

the modulation metering

warning does

at

the

port

not

antenna

with the

display for

monitor

low bat-

port

RF

port,

of

is

100

ex-

and

Step

3-2

FIGURE

A typical shows set frequency, frequency error, level. Modulation

MONITOR

--.- DBM

Continuous

AM

3-S.

CW

DISPLAY

Wave display screen (figure 3-5)

data

is

not

monitored.

-

-)

101.1000

INPUT

ERROR

LEVEL

KHZ

•

-15

-60.5

-100

FIGURE

0 +

PCTAM

0

3-6.

AM

DISPLAY

and

RF

MHZ

---.-

-41

+70.4

+ 100

input

w

15

~

'-._...)

A typical Amplitude Modulation display screen (figure 3-6) shows set frequency, frequency error, percent AM modulation, and RF input level.

-

-)

MONITORSSB

--.- DBM BFO

-15

FIGURE

INPUT

ERROR

LEVEL

KHZ

0

3-7. SSB DISPLAY

101.1000

A typical Single Side Band display screen (figure

MHZ

--.-

w

+3.62

+

15

3-7)

shows set frequency, RF input level, and BFO frequency error. Modulation

GENSWP

data

is

not

monitored.

-

-)

101.1000

MHZ

3.3

MODULATION

Figure 3-9 shows the connectors, controls, tors located in the front panel

SECTION

and

MODULATION

section. The modulation generator provides the RF generator with the modulating signal internally connected to either

or

frequency, amplitude,

lating signal sums the inputs

1 KHz test tone, multimode audio code synthe-

fixed sizer, and external inputs . Adjust the level source independently. The modulating signal able

at

•

FIXED

the Mod

1KHz

Out

TONE

sideband function. The modu-

of

three sources: Internal

BNC connector.

of

is

A 1 KHz test tone provides a convenient modulation

source for general troubleshooting,.

TORTION

Adjust the level with the

position turns

measurement,

off

the 1 KHz tone.

and

distortion measurement.

1 KHz Level control. The

SINAD

and DIS-

indica-

each

avail-

Off

RF LEVEL

419mV

FIGURE

3-8. SW:e DISPLAY

+5.4DBM

A typical Sweep display screen (figure 3-9) shows only

RF

set frequency and not

monitored. In sweep function, select either 0.01-1

MHz

or

1-10

MHz

output

range. Use the Dispr/Sweep vernier to control the sweep width. The minimum position fully counterclockwise and the maximum position

level. Modulation

data

is

is is

fully clockwise.

Code Syrllh

Mode

(;

Pl

DPl

•

Pl

DPlln'

8 Tone A

•

ToneS

•

fone

Seq

e Tone Remo1e

•

CODE

SYNTHESIZER

The code synthesizer generates either a single tone, a

multitone sequence, front panel and

TION

arrow key to select one

CRT

PL/DPL

Inv

or a DPL

display inputs. Press a MODULA-

Private Line/Digital Private Line Private Line/ Inverted Digital

sequence in response to

of

the six modes:

Private Line

Tone A

Tone B

Tone Seq

Tone Remote

Use the keypad to select frequencies in the 5 Hz

range for

Hz

20,000

range for the other modes (0.1

crements). The

Tone A frequency only Tone B frequency only Signaling Sequence Remote Base Control Sequence.

PL

or

DPL

modes

MODULATION

and

toggle switch initiates

Hz

in the 5

to 1,000

Hz

the programmed tone sequence:

Cont

- Continuous position generates repetitive cycles

Off

- Position terminates modulation

Burst - Position generates a single tone sequence .

Table 3-1,

Modulation/Function,

tabulates what works

when.

Hz

to

in-

FIGURE

Code

Synth

lvl

3-9.

MODULATION

rill

E•t

Lt!-

....

el

SECTION

3-3

MODULATION

Code Synth Mode

0

PL/DPL

0

PL/DPL

0

Tone A

0

Tone B

Inv

FUNCTION

Available only in

FM

Duplex Gen.

Available only in FM

Duplex Gen.

FM

Generate

or

Available as Modulation in FM,

or

SSB

AM,

FUNCTION Generate position. Available Mod

Out

jack,

at

selected, in

both

Generate

only in

all times

at

if

and

Monitor positions. Same as Tone

A.

0

Tone Seq

Available in FM, AM, or

SSB FUNCTION only in Generate position.

0

Tone Remote

Same

as

Tone A.

Note: All modulation sources are available at Mod Out jack while in use as generator modulation. Code Synthesizer Level control simultaneously sets both the output level and the modulation level.

TABLE 3-1.

MODULATION/FUNCTION AVAILABILITY

• EXTERNAL LEVEL External Modulation Inputs from a microphone

(Motorola RTM-4000B) plugged into the front panel and a signal applied to the Ext Mod In sum together to provide a single external modulating signal. The microphone input provides standard mobile radio preemphasis, clipping, and frequency roll-off. The microphone push-to talk switch switches the system from monitor to generate mode. Adjust the external input sensitivity control, for analyses with external instruments. The position turns

or

impedance with the External Level

off

the composite external modulation

Off

signal path .

• The Mod Out connector provides external access to the

is

composite modulation signals. Output impedance

600

ohms.

DISPLAY

•

Gcn

MooMtr

e

ModuiJI!Ofl

•

Spet:l

Analyl.~r

O

Duple•

Gcn

• RFMef'l'lory

• S1gnahng

•

• OVM OIST

•

9

•

Fr~q

E.111

Wattmeter

IF

Scope

Seq

Counter

AC

DC

1!111

FIGURE 3-10. DISPLAY MODES

3.4 DISPLAY SECTION To select one

figure 3-10, press an arrow key located under the DISPLAY list to activate up cent LED indicator. the top DISPLAY mode will wrap around. Confirm the selected configuration by the appropriate display on the CRT.

• GENERATE/MONITOR METERING

• GENERATE In Generate FUNCTION the Analyzer generates

signal at a controllable output level useful for receiver testing. Many forms tion can be simultaneously impressed on the carrier frequency to generate composite signals for servicing. Use

or

bottom

of

the twelve DISPLAY modes shown in

or

down movement

If

a DISPLAY mode

of

the list when a key

of

internal and external modula-

of

the adja-

is

located at

is

pressed, the

an

RF

the keypad to select any frequency

10KHz

from output range at the antenna port and the transceiver port provides sufficient amplitude to get through misaligned tuners and receivers.

change a receiver's frequency.

• RF LEVEL In the RF SECTION

push-pull switch associated with the Variable level control selects either the antenna port port. The out-position (Pull) selects the antenna port.

Control the output over a

RF Level control and the attenuation with the attenuator at tend the range to the maximum antenna input level

+

10

dBm. FUNCTION FM and CW

AM

RF OUTPUT LEVEL AT ANTENNA

• RF OUTPUT LEVEL Table 3-2 shows RF output levels available at the anten-

na port. At the in-position (Push) transceiver port (RF

In/Out)

the output level

dB below the level at the antenna port.

GENERATEFM

PL) 150.0

0.61

12.4

PCT

-60

-4.74

-100

GENERATE MODE METERING DISPLAY

3-4

of

to 1,000 MHz in

-----

E•t Watt

RF SECTION

Step

mew

RF

I

It

Level

CAUTION

125W

MAX

100Hz

is

especially effective to

----~

Vaflable

Mal(

w

FIGURE 3-11. RF SECTION

of

the front panel (figure 3-11) a

or

16

dB range with the Variable

10

dB per step. Use the attenuator to

VOLTS RMS DBM

0.1

uV

to 1 V -127 to +

0.1

uV

to 0.4 V

TABLE 3-2.

is

attenuated by a nominal

--)

154.1250

RF LEVEL

uV

DIST SINAD -18.1

DEY KHZ

0

FIGURE 3-12.

the generator

increments. The

the transceiver

14

Step

ex-

of

13

-127 to

+5

PORT

30

MHZ

DPL)

---

-111.4DBM DB

0

+4.75

+

100

r-.

.

,--......,

~

• GENERATE MODE Figure 3-12 defines a generate mode metering display.

To

operate, place FUNCTION switch in Generate posi-

' · tion. Press a FUNCTION arrow key to select a signal,

FM for example. From the keypad, enter the desired

frequency. The

luminate and the

Gen/Mon

CRT

Mtr and FM LED's

displays GENERATE FM and

il-

the carrier frequency. Use RF Scan control to tune up or down. Adjust deviation using the 1 KHz Level control. The CRT displays a complete summary

of

all

parameters including carrier frequency, selected code,

RF level in volts and dBm (analog and digital), devia-

is

tion or percent modulation. The display

explained

here line-by-line.

•

·)

1)

GENERATE FM

154.1250 MHZ

Line 1 displays the mode, function, and current operating frequency.

2)

PL) 150.0

Line 2 displays the

PL

or

DPL generate frequency. The system does not allow simultaneous code, the the DPL code, the

programmed

PL

and DPL.

DPL

PL

If

the operator enters the PL

display changes to dashes.

PL

display changes to dashes. The

or

DPL

applies to the carrier automatically. Control its level with the Code Synthesizer Level knob.

,.

4) RF LEVEL

5)

0.61

uV

DPL) • • •

code associated with the

If

he enters

-111.4DBM

FIGURE 3-13. RF SCAN CONTROL

• ANALOG SYNTHESIZER TUNING (AST) Figure

3-13

shows RF Scan control for Analog Synthesizer Tuning (AST). Manually scan through any frequency by

rotating counterclockwise at the rate revolution. The position quency reading determines the size cursor

is

over the

Hz.

If

the cursor

is

1 KHz. All seven possible cursor positions provide a

is

the

control

of

32

of

the display cursor in the fre-

100

Hz position, the step size

clockwise

frequency steps per

of

the step.

over the 1 KHz position, the step size

If

is

or

the

100

scan range from 0.01 MHz to 999.9999 MHz. Use the

Line 5 displays RF output level in volts rms and in dBm.

The voltage reading autoranges in three digits with the

uV

symbols

for microvolts and

dBm reading appears in four digits with

MV

for millivolts. The

0.1

dB resolu-

tion.

RF Scan control to perform a linear sweep to scan the

or

center frequency up or down. Switch to AM

FM Monitor FUNCTION to aid in positive identification and analysis

of

an input signal. Listen to the demodulated output via the built-in audio amplifier and speaker.

8) 12.4

9)

10)

-60

PCT

DIST/SINAD -18.1 DB

• RF SWEEP GENERA TOR

0

Use the SWEEP FUNCTION modes to continuously sweep the RF generator output, display bandpass filter

The distortion purpose input jack displays in percent with tion. SINAD displays in dB with bargraph responds linearly to the SINAD reading, originating at the left side at -60 dB SINAD and extending to the right side for SINAD values to 0 dB.

12)

-4.74

13)

___

14)

-100 0 +

of

an input signal applied to the multi-

0.1

OJo

0.1

dB resolution. The

DEY KHZ

_j

__

.._

___

+4.74

resolu-

_

100

and cavity response, and to identify defective filter net-

works. In SWP FUNCTION, select sweep width in the

0.01-1 MHz or

1-10

MHz range. The Dispr/Sweep vernier controls the sweep width within either range. Attach a demodulator probe (RTL-4075A) to the

Vert/ Sinad/Dist general purpose input port and select Scope mode. The scope's horizontal sweep tracks the sweep

of the output frequency, thus allowing a frequency domain analysis

of

filters, RF front ends, and duplexers, etc.

• MONITOR MODE

Lines

12,

13, &

14

display the level lation applied to the system RF output. Positive and negative readings autorange in 3 digits. The zerocentered bargraph extends to the right and left corresponding to the modulation level. The graph responds in a modified logarithmic manner that provides a smooth nonranging analog display with a full scale

of ± 100

KHz FM.

of

frequency modu-

of

center

The Analyzer monitors RF input energy from an antenna or a transmitter to accurately determine the frequency, power level, and modulation characteristics.

It

monitors signals from 0.01 MHz to 999.9999 MHz with a center frequency settable in 100 Hz increments.

CAUTION

15)

The w·ord ANT appears only when the antenna inon

put

the front panel

is

enabled.

3-5

Even when it

not selected, the antenna port

is

coupled

is

to the transceiver port with a nominal 30 dB isolation.

When using the transceiver port (RF In / Out) disconnect

the antenna from its port.

--)

MONITORFM

0

INPUT

WATTS 2.05

466.9750 MHZ

125

A frequency error or actual frequency displays operates simultaneously with FM or AM to SSB

mode, the display shows either the error frequency or the actual frequency BFO. Monitor use

of

the BFO. Adjust the BFO frequency over the

range

of

12)

-4.72

13)

___

SSB

mode receives

± 3 KHz from the monitor center frequency.

DEY KHZ

___.

_____

800Jo.

of

the MONITOR

SSB

signals

___

For

the

with~~

+4.75

_

ERROR KHZ 0.50

-15

-5.13

-100

DEY ALARM

FIGURE 3-14.

MONITOR MODE METERING DISPLAY

Figure 3-14 defines a monitor mode metering display. Set the toggle switch to Monitor, the FUNCTION to

FM, and the DISPLAY to Gen/ Mon Mtr. Here

line-by-line description

1)

MONITOR FM

On

line 1 the CRT displays MONITOR FM. When the operator uses the keypad and the display cursor to t:nter a preset channel number, between CRT displays the appropriate frequency from the RF

Memory table and the system operating frequency changes

quency, dashes replace the channel number and the

frequency changes as required.

4)

Line 4 displays the input signal level at the RF In/Out

connector from -70 dBm to 3 dBm with indication in

volts (use attenuator). Above switches to watts. The three-digit watts reading autoranges between 10, 100, and

If

accurate determination dashes replace the reading.

as

required.

-62.4 DBM

front panel settings

INPUT

9)

10)

-15

11)

The zero centered bargraph reflects the frequency error. The graph originates at the center display, moves to the left to indicate increasing

negative error, and to the right to indicate increasing

positive error. The graph responds in a modified

logarithmic manner that provides a smooth nonrang-

ing analog display on a full scale

row

BW

and ±

enables direct frequency readout mode, the CRT omits

the graph.

15

0

DEY KHZ

0 +

07.0 KHZ

of

this display:

• •) 454.1252 MHz

01

and 32, the

If

the operator enters a new fre-

LEVEL

30

125

or

input conditions do not allow

of

dBm or volt readings,

ERROR KHZ

•

0

of ± 15

KHz in wide BW.

170.0 uV

dBm, indication

watts full scale.

KHz in nar-

If

the operator

+

15

+5.23

100

is

-1.05

+

15

of

the

14)

-100

The display shows positive and negative modulation level

of

recovered FM in digital and analog readouts.

The reading in peak KHz autoranges full scale between

10

KHz and CRT omits the bargraph and a warning message replaces the normal modulation display:

The warning will not appear for inputs below -40 dBm at

the antenna port or below -10 dBm

ceiver port with the RF Step attenuator in the 0 dB

position. Use the attenuator to reduce the input signal level and remove the overload warning.

a

3-6

A continuous audible alarm sounds when a preset deviation limit sor keys simultaneously to invoke the Special Function display. Use the keypad to enter code #78XYZ to program the deviation alarm from 0.1 KHz to 99.9 KHz with

100

#78000 to disable the alarm.

15)

ANT displays only when the antenna input on the front panel the RF Step attenuator

dB position and the monitor mode

• SPECIAL FUNCTION MODE

Use the special function mode to expand the Analyzer's capability into areas not required for general use. Use the keypad to enter control information into the system and to customize for user preference without the use a specific CRT display. To enable a special function, at any time and during any mode:

SIMULTANEOUSLY DEPRESS BOTH KEYPAD

and then release. The screen changes to show a special

function command display. Two dashes appear on the

screen under the words:

Use the keypad to enter the two-digit special function code selected from table 3-3. Entering the code's last digit activates the selected function. quired, more dashes appear ditional data. The system reverts to the previous normal screen either shortly after

10

to

15

for each code to activate multiple special functions.

100KHz.

INCREASE

is

exceeded. Depress both keypad cur-

Hz resolution. Enter special function code

is

enabled. ATTEN) 0 displays whenever

CURSOR KEYS

SPECIAL FUNCTION ENTRY.

seconds

of

0 +

During overload conditions the

INPUT

no

ATTENUATION

at

the trans-

is

at a setting other than the 0

is

in use.

If

more

data

on

the screen. Enter the ad-

data

is

entered or after

data

entry. Repeat the sequence

100

is

re-

of

·

~

• SPECIAL FUNCTION CONTROL CODES

•

The

card

supplied with the R-2001D

inside the front-panel cover show the special function

--

codes. Table codes

grouped

and

then

• A master reset code 0 (zero) causes all function types to

revert

To

obtain a CRT

• functions, simultaneously depress sor keys twice. to

standard

CODE MODE ACTIVATES

--

0 Master Reset Clears all special functions

Encode/ Decode

10

11

Encode/ Decode Baseband

12

Encode/ Decode Decode only

13

Encode/ Decode Encode Only

Monitor

20

21

Monitor Monitor

22 23

Monitor Monitor

24

Monitor

25 26

Monitor Frequency Clears all frequency

30

Frequency

31

32 Frequency Enables direct frequency

33XY Frequency Enables scan lock from

3300

34XY

3400 Frequency Enables full-band scan

Frequency Enables full-band

Frequency Enables scan latch from

3-3

according

grouped

to

the

The

operation

lists the special function

to

the first digit

by function type.

default

states listed in table 3-3.

display

screen will automatically return

of

after

10

(default state) Clears all

functions (default state)

Clears all 2X special functions (default state)

Enables 300 Enables 3 KHz Enables 20 KHz Enables 5 Enables 300 Enables 3 KHz

special functions (default state)

Enables direct frequency readout

readout

XOO

scan lock

XOO

latch

and

all activated special

both

to

15

seconds.

IX

Hz

(10

Hz

(1

Hz

MHz

to

MHz

to

the applique

control

of

the code

keypad cur-

E/ D special

monitor

LPFL

HPFL

3X

resolution)

YOO

MHz

YOO

MHz

'

r c t

..

:'r

I

~-#-''

CODE MODE ACTIVATES

--

7700

78XYZ System

7ro5o

78000

---

DVM Enables

40

41

DVM

42 DVM

DVM

43

DVM Enables 300V DVM range

44

Modulation

50

Modulation

51

Modulation Meter Enables 100 KHz range

52

Counter

60

61

Counter

62

Counter Counter

63

Counter

64

Counter

65

System

70

71

System

72

System

73

System

74

77XY System

System

79

Software Version

99

Meter Enables

Control

Control Control

Control

automatic DVM ranging state)

Enables 1.0 V DVM range Enables Enables 100V DVM range

modulation (default state)

Auto

counter

(default state)

0.1

Hz

resolution

1

Hz

resolution

10

Hz resolution 100 Hz resolution 1

KHz

resolution

Sets factory control states (default state)

Sets the as the power-on state

Initiates a system self test Disables the

switching to if

the input signal

O.l.W.

Mutes speaker during Sets the last XY in RF

memory presets as duplex Resets from duplex

simplex (default state) Sets deviation audible

alarm

to

Disables audible alarm (default state)

Resets nonvolatile memory Shows

software version

PI N

(default

10

V DVM range

automatic

ranging

10

KHz range

resolution

current

XY.Z

state

automatic monitor

KHz

of

resident

is

_~-

mode

over

GEN

to

t¥\O

(I)Ly

TABLE 3-3. SPECIAL FUNCTION CONTROL CODES

tJ,

3-7

• AUTO

TUNE

MODE

Enable full-band scan lock with special function control code #3300 (table 3-3). The monitor scans its specified frequency range to automatically acquire and tune a

strong input signal within five seconds. For faster acquisition, use special function control code #33XY to limit the minimum input signal quisition

sc

an range

is

-30 dBm at the antenna port and 0 dBM at

to

100

MHz increments. The

level

for automatic frequency ac-

the transceiver port. The word SCANNING replaces the programmed frequency display. Line 8 displays the actual input frequency

± l KHz

as

shown in the example in figure 3-10. When tuned, dashes replace the SCANNING display and a dash nel number. When the input signal

in

the cursor replaces the chan-

is

removed, scanning

resumes.

• SCAN LATCH MODE Select this variation

of

the auto tune mode, using special function control code #3400 or 34XY to program and latch an auto tune frequency. In this mode, the input

signal

is

acquired and tuned in the same manner auto tune. However, the programmed frequency display shows the word:

• LATCHED

and a dash under the cursor instead

of

the preset

number. The second line on the metering display reads

• PRESS 0 TO RESCAN

If

the input signal

is

removed, the system remains programmed to the last frequency tuned. When the operator activates the 0 key, scanning resumes and the word SCANNING replaces the word LATCHED on the display. The preset number 0 appears under the cursor. Also, the CRT omits the second line

on

the display as

scanning resumes. The scan latch mode

frequency

of

trunked radios.

is

useful for locating the transmit

as

for

• VOLUME AND SQUELCH CONTROLS The Volume control adjusts the speaker output level.

The Squelch control located to the left control (figure 3-15)

is

continuously variable from

of

the Volume

position (disabled squelch) to a maximum squelch lev( of

-25 dBm ±

10

dB

at

the antenna port. When th

Signal Level LED illuminates, it indicates an open posi-

tion (unsquelched). When the LED

is

not illuminated, it indicates a closed position (from threshold to tight squelch).

• OFF-THE-AIR MONITOR Use the Analyzer's antenna port for off-the-air monitor-

ing. The Analyzer receiver's 1.5

uV

sensitivity allows off-the-air monitoring to measure transmitter frequency error and deviation to

1000

MHz. Monitor weak signals with the variable squelch. But for accurate measurement, set them higher to ensure proper signal-to-noise ratio. More accurate measurements result from using a higher signal level. The off-the-air monitor function enables frequent parameter checks to spot system degradation early and reduce service costs. Set Wide bandwidth for off-channel signal location

or

wide band FM. Set Narrow bandwidth for maximum sensitivity and selectivity.

• SIGNAL STRENGTH METER Place the FUNCTION switch in Monitor mode. The

frequency selective signal strength indicator, operates simultaneously with other monitor functions over the full input frequency range

imum

30KHz

bandwidth around the monitor center fre

of

the monitor. It uses a max-

quency. At the antenna port, the signal strength indicator operates for input levels from -99.9 dBm to dBm with the Step attenuator in the 0 dB position. non-zero attenuate both limits are increased by the amount

of

the attenuation. Measure higher level signals by inserting loss, using the rotary attenuator. The displayed measurement compensates for the attenuation.

Off

-30

For

,.-.......

a

3.6 MONITOR SECTION

Squelch

O

ff

-

Image Opll

H1gh

~

Low

Oemod

Out

FIGURE

3-15. MONITOR SECTION

Stg

lvl

•

Wtde

Narrow

• FM DEMODULATION The monitor demodulates FM to

in the wide

band

position and to 5 KHz in the narrow

75KHz

peak deviation

band position. Selectable highpass and lowpass filter

sections determine the monitor's frequency response

with characteristics

as

shown in table 3-4. Select bandwidth via BW switch or special function control. The wide band position enables the 5 Hz highpass and 20

8W

KHz lowpass filters. The narrow band position enables the 5 Hz highpass and 3 KHz lowpass filters. Special Function overrides the

B

FO

3-8

any combination

fined in table 3-3.

BW

switch to enable selection

of

high and low pass filtering as de-

of

• AUDIO FILTERS

Table 3-4 lists audio filter characteristics.

Filter Character-

is

tic

High pass:

Lowpass:

Filter Frequency

Mode (Not More

Than

0.5 dB)

5Hz 5Hz

300Hz

3KHz

20KHz 20KHz

3KHz

300Hz

Frequency

(Not More

Than

300Hz

3KHz

300Hz

3 dB)

Frequency

(At Least

20 dB)

170

Hz

1.7 KHz

40 KHz

5.4 KHz

Hz

540

• MODULATION

In the frequency MODULATION DISPLAY (figure 3-16), view the composite modulation audio waveform in generate mode

or

the demodulated audio in monitor mode. Analyze waveforms on the scope to measure deviation graphically. Use the MONITOR BW switch to select wide adjust frequency modulation level from 0 to

or

narrow bandwidth. In the wide position,

75 peak deviation. In the narrow position, adjust the range from 0 to 20 KHz. The display's vertical deflection calibrated for FM, generate three ranges with 0.25 KHz, 2.5 KHz, and

and

monitor modes, in

25

KHz per graticule division. Use the OSCILLOSCOPE modulation controls shown in figure level, vertical and horizontal.

3-41

to select deviation

To

set the range, adjust

the Vert control to the proper KHz/ Div. The modulating signal

is

generated internally by the

MODULATION SECTION. Refer to paragraph 3.3 in

this manual.

KHz

is

TABLE 3-4. AUDIO FILTER CHARACTERISTICS

• AM DEMODULATION

The monitor demodulates AM to a

level. The frequency response

is

cept that the lowest allowable highpass filter

10007o

modulation

the same as for FM ex-

cutoff

300Hz.

• SINGLE SIDEBAND DEMODULATION

The monitor has a minimum dynamic range the sideband mode. The frequency response

of

30

is

the same

dB in

as for FM.

• AUDIO MONITOR

A speaker monitors the recovered signal in the monitor mode

and

the modulating signal in the generate mode. The speaker drive signal audio pin

of

the microphone/headset connector. Use

is

also applied to the receive

special function control to disable the speaker while maintaining the headset audio signal with volume control. The audio signal frequency response ranges from 300 Hz to 20 KHz in the wide band and from 300

Hz

3 KHz in the narrow band.

FIGURE 3-16. MODULATION DISPLAY

to

is

CENTERFREQ

07) 156.2800 MHz

dB

FIGURE 3-17. SPECTRUM ANALYZER DISPLAY

• SPECTRUM ANALYZER

The Spectrum Analyzer display, figure 3-17, shows center frequency, channel number,

and

operating frequency. Use the keypad to enter the channel number, from

01

to

32

or enter a center frequency directly. Use the Spectrum Analyzer to identify interference, trace RF and

IF signals, measure transmitter harmonics, check spurious response and receiver local oscillator radiation. The

CRT

displays the appropriate frequency from the

RF

Memory table and changes the system operating frequency as required. Entering a new frequency changes the channel number to a dash operating frequency as required. The window

transceiver

of

the

RF

spectrum at either the antenna

port

in a range selected from 1 MHz to 1 ,000

MHz programmable in

and

changes the system

CRT

100

Hz increments. The ob-

displays a

served window for the Analyzer can be controlled with the Dispr /Sweep and Analyzer has a dynamic range

RF

Scan controls. The Spectrum

of

at

least

75

dB with the Step attenuator in the 0 dB position. With the attenuator, the usable range can be extended up to the maximum allowable input levels. When using the attenuator, dB reading

-95 dBm

add

10

dB per step attenuation to the actual

on

the scope. The usable sensitivity

at

the antenna

port

and

is

-65 dBm

at

transceiver port.

KHz

or

least

the

3-9

Ant(>nna

CAUTION

DD

hOI

L

INtUT

'0*U

DUPLEX GEN

On

011

Ou!pul

OD

NO!

'kPUI

I'OW[A

FIGURE 3-18. DUPLEX GENERATOR SECTION

DPLX DPLX Offset DPLX

-2.06

-100

ANT

FIGURE 3-19.

Monitor

Generate

PL)---

DUPLEX

DEV KHz

DUPLEX

06)

029.7750 MHz +45.00 MHz

074.7750 MHz

DPL)

137

GEN

+2.06

0

+ 100

ATTEN) 0

GENERATOR DISPLAY

also changes to maintain the displayed offset value whenever a new monitor frequency

is

entered. The pro-

grammable duplex offset equals the generate frequency

+I- the monitor frequency.

The MONITOR Image/ Duplex switch controls positive or negative signal

of

the offset. As the offset

tht

changes, the generate frequency changes to reflect the new offset. On line

1,

enter the channel number to select a frequency from the RF memory table. In DUPLEX GEN mode, the Image/ Duplex two-position toggle

switch controls the duplex frequency output for above

(High) or below (Low) the receive programmed frequen-

cy

. In monitor mode, this switch selects the frequency

the local oscillator injection above

or

below the pro-

of

grammed monitor frequency to remove image in-

PL

or

DPL

code

of

terference. Enter either the duplex generate frequency. PL

location, the

entry

is

made into the

DPL

changes to a dash. Line

If

display changes to a dash.

DPL

11

indicates the position FUNCTION switch. Generate mines the source analysis.

It

of

modulation available for system

is

either applied to the duplex generator

an entry location, the

or

is

made into the

PL

Monitor mode deter-

the

If

an

display

of

the

or recovered from the monitor receiver. Both positive and negative readings autorange scale from

10KHz

to 100KHz. The bargraph represents

in

three digits with full

modulation levels and provides a smooth nonranging analog display on a full scale

of

20KHz

FM.

• DUPLEX GENERA The Analyzer provides an RF output that

TOR

is

offset in frequency from the Monitor center frequency and enhances capability to service duplex radio equipment such

as

repeaters, car telephones, and emergency

medical telemetry portables. The DUPLEX GEN Out-

put becomes the generate port for this mode while the transceiver Figure 3-18 shows the

On/Off

located

or

antenna port becomes the monitor port.

DUPLEX

GENERATOR

toggle switch, Antenna and Output connectors,

in

the lower left-hand corner

of

the front panel.

The duplex generator operates over the full monitor fre-

quency range and provides frequency offsets from 0 MHz to the single fixed offset

±

10

MHz programmable in

of ± 45

5KHz

steps and

MHz. The duplex

generator has full internal and external FM modulation

capability, including voice simultaneous with audible and subaudible tones. This modulation appears on the RF coming a separate -35 dBm

Figure 3-19 shows the

off

the DUPLEX GEN Output port which

(4

mV) RF output.

DUPLEX

(Monitor, Offset, Gen-

erate) display, channel number, and system monitor fre-

quency. Enter the channel number. The CRT displays the appropriate frequency from the RF Memory table. The system operating frequency changes as required. the channel number defines a duplex frequency pair, the

generate frequency

shows the corresponding calculated offset.

exceeds

±

45

of

that pair displays on line 5. Line 3

MHz or 0 ±

If

the offset

10

MHz, the generate frequency changes to reflect the offset that was displayed before channel selection. For a new entry, the channel number changes to a dash and the system operating frequency changes as required. The generate frequency

is

If

RF MEMORY

09)

11)

12)

13)

14)

• RF MEMORY An internal nonvolatile memory stores and displays pro-

grammable RF frequencies and their corresponding or enter quency remains in the table until it programmed, the memory provides one button recall to set the operating frequency and code for the preset frequency. Figure 3-20 shows a typical RF Memory table page. The display allows page numbers from 1 to 4. When the page number to reflect the information stored on the new page. Enter all numeric values, except preset channel numbers, up to a total or function control code 77XY (table 3-3). Duplex chan-

3-10

-

-)

267.5673 MHz

PL) - - -

DPL)

PAGE

RF(MHz)

150.5200

823

.7320

154

.0000

164

.0000

145.0000 164

.5500 TX

174.5500

TX TX

TX

PL

-·-

063.0

075.0

003.2

(Hz)

FIGURE 3-20. RF MEMORY DISPLAY

DPL

codes. Use the keypad and display cursor to

or

.change a frequency in the memory table. A fre-

is

changed. Once

is

changed, the display changes

of

32

entries. Preset channels are either simplex

duplex. Select 0 to

16

duplex channels through special

132

SEL) 2

DPL

131

226

PL

"---"

'--._....-

nels display a pair number, one for generate and one for monitor. Identify generate TX. The system changes automatically from transmit to receive frequencies with the Generate / Monitor switch or and each generate frequency either a code. When a preset DPL generator.

• ENTRY To

proceed as follows:

1.

2. cation to be changed .

3. Use the keypad numeric keys to enter the new frequency,

4. the memory table.

5. onds. to verify that all information

• ENTRY To

table, proceed as follows:

I.

2. Use the keypad cursor keys to locate the cursor over the first digit in the frequency.

3. Use the numeric keys to enter a new frequency. The new frequency displays automatically when the power turned on.

4. after a new frequency was entered directly, the frequency from the memory table takes precedence and it will appear when the Analyzer

5. mode, use the same procedure the second line.

•

PRESET

The Analyzer's normal internal configuration turns-on at

system to turn-on at any other configuration, proceed as follows:

1.

2.

3.

Code Synthesizer Mode.

4. Simultaneously depress both keypad cursor keys to obtain the special function display. Enter code number

or

monitor frequencies by the letters RX or

the MIC push-to-talk switch. Each simplex channel

PL

or

code

is

WITH

enter a frequency

Select RF Memory DISPLAY position.

Use the keypad cursor keys to select the line

PL,

or

Make other changes

Turn the

Turn

enter a frequency

Select Gen/ Mon/ Mtr DISPLAY position.

If

a frequency

To

Gen / Mon Mtr, FM, and PL/

Press Press Press a MODULATION key to select the desired

POWER

the switch On

WITHOUT

change

TURN-ON

an

arrow key to select the desired DISPLAY.

an

arrow key to select the desired FUNCTION.

of

frequencies for each channel

of

a duplex channel has

DPL

code. A dash replaces an unused is

selected, the appropriate

also programmed into the signaling

MEMORY TABLE

or

code into the memory table ,

and

DPL

code.

or

corrections for each line

switch to Standby for five sec-

and

check the memory table

is

correct.

MEMORY TABLE or

code without using the memory

is

selected from the memory table,

is

or

add

PL

or

turned

DPL

off

and one again.

codes in the generate

but

move the cursor

DPL.

To

program the

PL

or

lo-

of

to

is

71

to enter the new configuration into the nonvolatile

memory.

5.

Turn

the

POWER

Check the display's accuracy.

6.

To

restore the system to normal turn-on configura-

tion, follow steps 1 through 4 above.

• SIGNALING SEQUENCE The complete signaling simulator in the system includes

both encode and decode tone sequence synthesizer capability for the following MODULATION modes:

Fixed 1 KHz tone Single tone variable

Private Line (PL)

Tone A Digital Private Line (DPL) sub-audible squelch Two-tone sequential paging 5/ 6 tone paging Select V signaling

General sequential, ten-tone

Mobile telephone signaling

(IMTS) improved mobile telephone system

(MTS) mobile telephone system 2805Hz

Tone Remote, base station

SIGNALING SEQUENCE MODE SEL) 0

ENTER

1)

A/ B ENCODE

2)

5/ 6

TN

3)

SELECT V ENCODE / DECODE

4)

PL

DECODE

5)

DPL

DECODE

6)

GENERAL SEQ

7)

MOBILE

MON/ GEN SW FOR DECODE/

SIGNALING SEQUENCE MENU DISPLAY

• SIGNALING SEQUENCE MENU Figure

page 0 showing the set one for each family quences. During the menu display no sequence possible.

1 and enter a number from 1 to 7. The system generates

the selected family's sequence.

The sensitivity OSCILLOSCOPE Vert switch and vernier. For best results, set the control for a tion in the oscilloscope mode. NO causes wandering

3-21

To

INPUT

defines the Signaling Sequence menu for

select a page, place the cursor over 0

of

SIGNAL indication

switch

or

Tone B

ENCODE

TELEPHONE

FIGURE

of

the decode circuits

off

0 FOR MENU

/ DECODE

ENCODE

3-21.

of

seven sub-displays

encode and decode tone se-

NOTE:

90o/o

Too

or

erroneous readings.

and then on again.

/ DECODE

ENCODE

or

output

is

controlled by the

of

full-screen deflec-

little signal causes a

on

the screen; too high

pages,

on

line

is

3-11

•

DECODE

All decode screens have a "start" decode select. This will start the specified decode and put the software into a tight loop. This assures the best accuracy possible, to

do key entries except to go to the "menu" decode loop. During the decode loop, a " message appears near the

"0" entry on the 2nd line will return the screen to menu,

a "1" entry starts a decode ess, and a "2" will end the decode.

MODE

so, the analyzer ignores all switch selections and

SCREENS

top

or

to "end" the

DECODE"

of

the screen. In general, a

will reset a decode in proc-

but

PL

CODE

xz

wz

XA

WA

XB

FREQ.

67.0

69.3

71.9

74.4

77.0

HZ

PL

CODE

4Z

4A

4B

5Z

SA

FREQ.

136.5

141.3

146.2

151.4

156.7

HZ

r-.......

SIGNALING

0)

MENU

PL

DECODE

FIGURE

PL

• Select Signaling Sequence DISPLAY, Monitor FUNC-

TION,

select the signal source for the decoder. The decoder accepts signal inputs from either the internal monitor demodulator Analyzer decodes tone sequence,

to determine the generating code. Figure 3-22 shows a

page 4 display

Frequencies readout to a maximum 300

resolution.

be displayed. Dashes display the limit. Table quencies.

3-22.

DECODE

and

PL

The

SEQUENCE MODE SEL) 4

1)

START

FREQ: 076.3

CODE: -

PRIVATE

Mode. Use special function control to

output

of

a decoded code

3-5

lists all valid

LINE

DECODE

or

from the Ext Mod In port.

PL

of

the nearest valid frequency will

if

the frequency exceeds

PL

2)

END

DISPLAY

and

DPL

signals,

frequency and code.

Hz

with 0.1

codes

and

their fre-

The

Hz

.

WB

YZ YA

YB

zz

ZA

ZB

1Z

1A

1B

2Z 110.9 M4 2A 2B 3Z

79.7

82.5

85.4 6A

88.5

91.5 7Z

94.8 7A

97.4

100

.0 8Z

103.5 M2

107.2

114.8

118.8

123.0

5B 6Z

6B

M1

M3

9Z M5

M6

162.2

167.9

173.8

179.9

186.2

192.8

203.5

206.5

210.7

218.1

225.7

229.1

233.6

241.8

~

3-12

3A

3B

TABLE

127.3

131.8

3-5.

VALID

M7

PL

250.3

CODES

"-..._..,.

023

071

134

223

306

411

503

025

072

143

226

311

412

506

026

073

152

243

315

413

516

031

074

155

244

331

423

532

032

114

156

245

343

431

546

043

115

162

251 047 051

054 065

116

165

125

172

131

174

132

205

TABLE 3-6.

261

263

265

271

346 432 351

364 365 371

VALID

565

445

606 712 464 612 465

624 466

627

DPL

CODES

SIGNALING SEQUENCE MODE SEL) 5

0)

DPL

•

DPL

Figure page

DECODE

MENU

- NO

FIGURE 3-23.

DECODE

3-23

shows a display

5.

If

the system detects an invalid code, dashes re-

DPL

INPUT

DPL

1)

START

CODE:

321

SIGNAL -

DECODE DISPLAY

of

a detected valid code on

2)

place the code number. Table 3-6 lists the valid codes.

631

734

632

743 654 754 662

664 703

723 731 732

END

DPL

•

A/B

ENCODE

Figure 3-24 shows a display for page 1

of

the menu. To select sequence input, enter a number from 1 to 4. Enter Tone A and Tone B frequencies. Each frequency has a maximum value

of

20,000 Hz with a resolution Hz. The system responds to changes in the tone frequency to allow the next complete signaling sequence to be executed with the new tone frequency. The majority of

two-tone pagers use the first two fixed sequences

listed

in

the tone sequence table. The operator cannot change the first two sequences but he can change the last two. Each delay entry has a maximum value seconds. The system responds to new entries during an active sequence to allow the next complete signaling quence to be executed with the new timing mformation. For triggered sweep on the oscilloscope program the scope trigger delay to a maximum second resolution).

If

time entered exceeds Tone Se-

quence time, the oscilloscope

10

seconds (0.001

will

not trigger. Enter

000.0 to disable trigger delay.

• TWO-TONE SEQUENTIAL PAGING

Program a two-tone pager access sequence with Tone A and Tone B frequencies, tone durations, and time between tones as defined in figure 3-24. Select Tone Sequence mode for the code synthesizer, A/ B sequence on the Signaling Sequence DISPLAY, and Generate FUNCTION. The timing format for this mode consists of

Tone A for the programmed time, followed programmed delay, followed by Tone B for the programmed time, followed by the second programmed delay. This sequence will repeat in continuous position but generate only a single sequence in burst position.

SIGNALING SEQUENCE MODE SEL) 2

ENTER 0 FOR MENU

5/6

TONE

1)

5-TONE SEQ

ENCODE

SEQ SEL) 2

2) 6-TONE SEQ

of

by

0.1

10

se-

the

SIGNALING SEQUENCE MODE SEL) 1

ENTER 0 FOR MENU

A/BENCODE A) 01200.0 Hz

A DLY

1)

0.40

2)

1.00

3)

0.10

4) 0.20 SCOPE

B DLY

0.00 0.20

0.00 3.00

0.10 0.10

0.20 0.20 0.20 TRIG

DL

Y)

0.000 SEC

SEQ SEL) 1

B)

00300.0 Hz

1.00

1.30

0.10

TN&VCE

FIGURE 3-24. TWO TONE (A/B) ENCODE

DISPLAY

(SEC)

TONE

3-13

CAP

CODE) 2-13340X

SCOPE TRIG DL

Y)

0.000 SEC

FIGURE 3-25.

5/6

TONE ENCODE DISPLAY

5/6

TONE ENCODE

•

Figure menu. Select either 5-tone

3-25

shows an encode display for page 2

or

6-tone paging. Table lists the cap code digits and their frequencies. Enter the cap code digit for the desired output sequence. The code has a preamble tone number followed by a 5-digit quence number. An X automatically appears of

the cap code. The system responds

to

at

the end

changes in the cap code to allow the next complete signaling sequence to be executed with the new code information. The sixth or

X tone may not be transmitted by selecting the 5-tone sequence. the normal tone X time

If

the tone

is

not transmitted, a delay equal to

is

inserted. With the MODULATION switch in continuous position, the output consists of

the preamble tone followed by a continuous cycling 5

or 6 tone sequence. Cycling terminates only when the

is

switch

moved to the

off

position or the mode

of

the 3-7

se-

is

changed. Burst position generates a single cycle preamble tone followed by the 5 which the

DIGIT

output

terminates.

FREQUENCY

HZ

0 600

741

2 882

3

4 1164

5 1305

SIGNALING

0)

MENU

5/ 6

TONE

CODE:

2 - 4 5 3 1 1 X

FREQ: Hz

1023

TABLE

SEQUENCE

DECODE

0082

3-7.

1164

or

DIGIT

CAP

1)

START

1305 0741

6 tone sequence

FREQUENCY

HZ

6

7

8 1728

9 1869

R 459

X 2010

CODES

MODE

1023

1446

1587

SEL) 2

2)

END

0429

1446

after

SIGNALING

SELECT V ENCODE

1)

ZVEI

3)

CCIR

(70MS)

5)

EEA

SCOPE

FIGURE

•

SELECT V ENCODE

TRIG

3-27.

Figure 3-27 shows one

of

the five sequences to display the five-digit access code for Select V. of

a new access code to execute the next complete sequence. Table 3-8 lists tion in milliseconds for each digit A sequence consists

SEQUENCE

ENTER 0 FOR

MODE

MENU

SEQ

2)

MODIFIED

4)

CCIR

(lOOMS)

ACCESS

DL

Y) 0.000

CODE)

12345

SELECT V ENCODE

an

encode display

The

processor responds to the entry

tone

frequencies

of

a single series

on

of

the five sequences.

of

SEL) 3

SEL) 1

ZVEI

SEC

DISPLAY

page 3. Select

and

time

five tones in re-

sponse to the five-digit access code. Each tone lasts for the specified using the

TONE

NUMBER

burst

ZVEI/

duration.

or

B.O

HZ HZ

Select single

continuous

.S.

MOD.

ZVEI

or

repetitive cycles,

switch position.

CCIR

HZ

EEA

HZ

CCIR

/""'\

dura-

HZ

TIME: SEC

FIGURE

• 516

TONE

3-26. 5/6

DECODE

.035

- NO

.035

INPUT

TONE

.035 .035

.035

SIGNAL

DECODE

Figure 3-26 shows the decode display reset

is

activated by entering a "1" for decode decoder sequence resumes. detects the presence pears mains blank .

quency, a detected frequency for each digit

format

information

at

the

end

dash

If

replaces

is

replaced by dashes

of

the sixth

of

the code. Otherwise,

the sequence detects

that

staggers a line with the

If

the decode sequence

or

digit.

The

of

appropriate directly below the code digit. Frequencies maximum the decode sequence warning message displays. decoded sequence put decode

value

of

10,000

cannot

information,

condition, until the

or

changes the display.

Hz

with 1

detect

The

display retains the last regardless

operator

.035

-

DISPLAY

on

page 2.

"START",

and

If

the

all

the

X tone, the X ap-

that

space re-

an

invalid fre-

display shows the

the cap code.

The

frequency

Hz

resolution.

an

input

initiates

readout

of

to

signal, a

signal in-

another

If

1060

2 1160

1270 1160

4 1400 1270

1530 1400

6

7 1830 1670

8 2000 1830

9 2200

a

0

R*

TONE

LENGTH

ms

1670 1530

2400 2200

2600

70

970

1060

2000

2400

70

1124

1197

12

75

1358

1446

1540

1640

1747

1860

1981

2110

100

1124

1197

1275

1358

1446

1540

1640

1747

1860

1981

2110

40

1124

1197

1275

1358

1446

1540

1640

1747

1860

1981

2110

70

3-14

*R is the repeat tone which

TABLE

a repeat (Example:

3-8.

of

the same

Encode

SELECT V SEQUENCE

is

inserted wherever there is

tone

in

adjacent

13334 as 13R34).

SPECIFICATION

time slots

----..,..

SIGNALING SEQUENCE MODE SEL) 3

0)

MENU

SELECT V DECODE

1)

ZVEI

3)

~

CCIR (70MS)

5)

EEA

CODE: FREQ:

HZ

TIME:

SEC

FIGURE

• SELECT V DECODE Figure 3-28 shows a decode display on page

of

the five sequences to display the decoded access code for Select the sequence, a dash replaces that digit. The display shows decoded tone frequencies for each code digit, to a maximum 10,000 shows the time duration that the tone for each digit was present, to a 1 second maximum with 1 millisecond resolution.

SIGNALING SEQUENCE MODE SEL) 6

GENERAL SEQ ENCODE

FREQ

HZ

1)

10531.0

3)

03561.0

5)

11532.0

7)

00000.0

9)

00000.0

FIGURE

1)

START

2)

END

SEQ SEL) 1

2)

MODIFIED ZVEI

4)

CCIR

(lOOMS)

1080

.070

2

1160

.070

2

2600 1530 1270

.070 .070 .070

5 3

3-28. SELECT V DECODE DISPLAY

3.

Select one

V.

If

an invalid frequency

Hz

with 1 Hz resolution. The display

is

detected within

ENTER 0 FOR MENU

TIME

MSEC

SCOPE

0030 0030 0030

0000 0000

TRIG

FREQ

HZ

2) 02000.0

4)

01876.0 0030

6)

08471.0 0030

8)

00000.0

10)

00000.0

DL

Y)

0.000 SEC

TIME

MSEC

0030

0000 0000

3-29. GENERAL ENCODE DISPLAY

• GENERAL ENCODE Figure 3-29 shows the general encode display on page

Select one

of

the ten possible sequences. Enter the pro-

grammable tone frequency from 0 to 20,000 Hz and the

time duration from 0 to 10,000 milliseconds. Press a code synthesizer key to select Tone Sequence Mode. Place the MODULATION switch in burst or continuous position to initiate the sequence. Each

of

the tentone frequencies will be generated in sequence for its duration before the generator proceeds to the next tone.

SIGNALING SEQUENCE MODE SEL) 6

0)

MENU

1)

START

2)

END

GENERAL SEQ DECODE

FREQ

HZ

1) - - - -

3) - - - -

5) - - - -

7) - - - -

9) - - - -

TIME MSEC

- NO

INPUT

FREQ

HZ

2) - - - -

4) - - - -

6) - - - -

8) - - - -

1

0)

- - - -

SIGNAL -

TIME MSEC

FIGURE 3-30. GENERAL DECODE DISPLAY

• GENERAL

DECODE

Figure 3-30 shows a display for the general ten-tone quence decode table on page

6.

Frequencies and time durations are derived from the input signal. Frequency is

displayed up to a maximum value

of

9999Hz resolution). No display in a FREQ field with a time duration in the TIME field indicates that a space occurred between the preceding tone burst and the following tone burst. Time value

of

9999 milliseconds

• MOBILE

TELEPHONE

is

displayed up to a maximum

(1

ms

resolution).

SIGNALING

The Analyzer simulates base to mobile and mobile to

It

base sequences.

generates the appropriate signaling sequence, verifies mobile radiotelephone response, decodes and displays tone frequencies and telephone num-

bers. An error message during a sequence indicates radio failure. To reset the mobile telephone decoder and initiate a new sequence, press "1" for "START" again.

(1

6.

se-

Hz

'-...___/

3-15

SIGNALING SEQUENCE MODE SEL) 7

0)

MENU

1)

START

MOBILE TEL

1)

IMTS

2)

MTS

3)

2805

TEST SEQ SEL) 1

1)

MOBILE ORIG

TONE

1)

2000Hz

TONE

2)

END

SEQ SEL)1

2)

BASE ORIG

2)

1800Hz

ERROR MESSAGE

06

Illegal tone transition (M.O.). Mobile ID or phone number sequence

is For example, guard tone space, guard tone,

or

connect tone-space-connect tone

would generate an error.

TABLE 3-9. IMTS ERROR MESSAGES

incorrect.

~

MOBILE ID DIALED NO GUARD FREQ CONN FREQ

DISC FREQ

- - - - Hz

FIGURE 3-31.

IMTS MOBILE ORIGINATED DISPLAY

• IMTS MOBILE ORIGINATED Figure

3-31

shows a page 7 display. Select one three phone systems, by Sequence Select and either mobile or base originated, by Test Sequence Select. Here the display shows a test sequence menu for IMTS with the information decoded from the mobile radio for a mobile originated sequence. The mobile ID and dialed number vary up to a maximum number

of

seven and ten digits, respectively. The maximum decoded frequency 10,000 Hz with 1 Hz resolution. Error messages display under DISC FREQ (refer to the tone sequence diagrams in your IMTS Manual).

ERROR MESSAGE

B.O. means base originated; M.O. means mobile originated.

01

Incorrect IMTS tone. M.O. tone was not one

of

the three possible receive tones: Connect Guard Disconnect.

This error can happen only after the guard tone has been received.

of

the

is

SIGNALING SEQUENCE MODE SEL) 7

0)

MENU

1)

START

2)

END

MOBILE

TEL

1)

IMTS

1)

MOBILE ORIG

MOBILE ID GUARD FREQ CONN FREQ DISC FREQ

SCOPE TRIG DL

2)

MTS

3)

2805

7635412

-

--

- - - - Hz

- Hz

Y)

0.000 SEC

SEQ SEL) 1

TEST SEQ SEL) 2

2)

BASE ORIG

FIGURE 3-32.

IMTS BASE ORIGIN A TED DISPLAY

• IMTS BASE ORIGINATED Figure 3-32 shows a page 7 display allowing the operator

to enter a 1 to 7 digit ID for the mobile being tested. Enter a number in the most significant location. Dashes

of

replace the desired number number

of

digits. The other digit locations remain as

digits. Enter the desired

dashes. The processor responds to changes in the telephone number to allow the next complete dialing quence to be executed with the new number. The display shows decoded signaling tone frequencies for an IMTS base originated sequence, with 10,000 Hz maximum frequency and 1 Hz resolution. Error messages display on the line above SCOPE. The Analyzer encodes and decodes the information defined by figures

3-31

and 3-32.

~

se-

02

03

04

05

Too many digits decoded

or

The mobile ID

phone number had too

(IMTS-

M.O.). many pulses (more than ten). Time-out error (IMTS - M.O. or B.O.).

Tone lasted longer than spec, in specified state.

Improper sequence (M.O.). Sent mobile ID before seize tone.

No guard tone (B.O.). Mobile doesn't respond to seize tone.

SIGNALING SEQUENCE MODE SEL) 7

ENTER 0 FOR MENU

BURST TO START

MOBILE

TEL

1)

IMTS

2)

MTS

3)

2805

SEQ SEL) 2

MTS

TONE

1)

2000Hz

MOBILE

SCOPE TRIG DL

TONE

ID

7635412

Y) 0.000 SEC

FIGURE 3-33. MTS MOBILE TELEPHONE DISPLAY

• MTS MOBILE Figure

3-33

TELEPHONE

shows a page 7 display

of

tone 1 & tone 2

frequencies used in generating mobile telephone MTS

3-16

2)

1800Hz

~

and

2805

sequences. Enter frequencies up to a maximum 10,000 Hz with 1 Hz resolutions. The processor responds to changes in tone frequencies to allow the next complete sequence to be executed with the new tone frequencies. The MTS sequence requires no test

~

quence select and has no mobile to base system.

SIGNALING SEQUENCE MODE SEL)7

ENTER 0 FOR MENU BURST TO START

MOBILE

TEL

1)

IMTS

2)

MTS

3)

2805 2805 TONE

1)

0000 Hz

MOBILE

10

TONE

FIGURE 3-34. 2805 BASE ORIGINATED DISPLAY

• 2805 BASE ORIGINATED

Figure 3-34 shows a page 7 display for the mobile tele-

2805

phone defines the encode information for 2805

sequence requires no test sequence select and has

sequence, base originated. Figure 3-34

2805

no mobile to base system.

•

TONE

SEQUENCE

Select Tone Sequence Mode (memory display) for the code synthesizer. Encode in generate function, decode in monitor function, or use special function control to encode

or

decode in either generate

or tion. The tone memory table displays details for all signaling systems. Program frequency, time duration, and time interval.

•

TONE

REMOTE (ENCODE)

The System can

be

used to simulate a tone remote control console, or to troubleshoot tone control decoding circuitry in remote base station. These useful tone bursts are available at the MOD OUT jack on the front panel so that they can be coupled onto phone lines other place they may be needed. Activate the tone bursts by selecting TONE REMOTE mode in the MODULA-

TION section propriate frequencies

of

the front panel. Select the two ap-

of

the tone bursts by program-

ming Tone A and Tone B frequencies in the Two-Tone

paging sequence. Typical guard tone frequency (Tone A)

is

2175

Hz. Function tones (Tone

B)

vary by system. Select Tone B from table 3-10. Refer to your Tone Remote Instruction Manual for detailed information .

se-

SEQ SEL) 3

2)

2805

Hz

sequences. The

monitor func-

or

any

Hz

Hz Hz Hz

Paging Systems

1950H

z N/ A 1850Hz

2050Hz

N/ A

155011450

1550/1450 1350/1250 1150/1050

Control & Function I Freq. Systems

Fl

Transmit

F2

Transmit N/ A

Fl Transmit w/ o PL N/ A PL Monitor 2050 Hz R2

Off/R2

Rptr

Off!Rptr

PL

On/

PL Wild Card I Wild Card

TABLE 3-10.

1950Hz

On N/A

On

1550/1450

Off

1550/1450 1350/1250

II

1150/1050

Hz Hz Hz Hz

TONE

2 Freq. Systems

1950Hz

1850Hz N/ A 2050Hz

1750/1650 N/ A

1550/1450

1350/1250

1150/ 1050

B FUNCTIONS

Unlike the other signaling sequences, this special mode provides no repetitive sequences. Institute the TONE

REMOTE sequence by moving the MODULATION switch to BURST or CONTINUOUS. The sequence issues TONE A for

ms at a level

follows at a level for

as

long as the MODULATION Switch

either the BURST

of

level

these bursts

115

ms

10

dB below that

30

dB

below that

or

CONTINUOUS position. The

is

adjustable with the MOD LEVEL

followed by TONE B for

of

Tone A. Tone A

of

the initial Tone A

is

held in

control, and may be observed with the MODULATION

DISPLAY similar to any signaling sequence.

•

TONE

REMOTE (DECODE)

Connect the Analyzer's Vert/Sinad/Dist input to the Tone Remote unit's output. Select Signaling Sequence

DISPLAY and Monitor FUNCTION. Select General Sequence Decode Mode,

as

shown in figure 3-30, and enter Special Function control code #11. The screen displays frequency and time duration for both high level guard tone (A) and function tone (B). After obtaining the information for F-1, press either keypad cursor key once to reset. Obtain information for F-2 and reset, etc.

GENERATEFM

PL) 936.0

04) 285.7750 MHz DPL)---

COUNT MODE SEL) 2

2)

1)

FREQUENCY

PERIOD

RESOLUTION SEL) 6

1)

0.1

3)

5)

Hz 10Hz 1 KHz

INPUT

FREQUENCY * 10.723 MHz

2)

4)

6)

1.0 Hz 100Hz AUTO

- RANGE SW NOT AT MAX SENS POS -

FIGURE

3-35. FREQUENCY COUNTER DISPLAY

Hz Hz Hz Hz

40

.._____..,

3-17

• FREQUENCY COUNTER Figure

ternal Frequency Counter measures input from 35

3-35

shows a Frequency Counter display. The in-

MHz. To measure signals higher than

10Hz

35

MHz, use the frequency error readout in the monitor mode. The CRT displays an autoranging output allowing the operator to measure precisely and set offset oscillators, IF's, PL

frequencies, and other external input signals. Frequency counter operates in either generate or monitor function. Use these codes

PL/DPL

off

the air. Enter number 1 or 2 to select

decode modes for measuring

either frequency counting or period counting . In the counting mode, select one or

automatic ranging. Frequency counting

above 1 KHz. Period counting

of

the five display resolutions

is

preferred

is

preferred below 1 KHz. Adjust sensitivity with the OSCILLOSCOPE Vert switch and vernier. For best results, set the control for a 900Jo

of

full-screen deflection. Too little signal causes a

NO

INPUT

causes wandering

SIGNAL indication on the screen; too high

or

erroneous readings. The display shows the calculated input frequency, the five digit frequency readout with operator selected resolution, the acronym for the multiplier (Hz, KHz, MHz) and position

of

the decimal point

as

identified in table system automatically ranges to display the best resolution

of

the input frequency consistent with table

1. operator selects a resolution inconsistent with table an appropriate warning message: INCREASE RESOLUTION or DECREASE RESOLUTION replaces this entire line. The processor programs for a new resolution and attempts a new frequency reading. When the processor updates a frequency, the asterisk on line

12 for 0.1 second. The warning message displays on line 14,

whenever the input range attenuator

most sensitive position. Table

3-11

lists the relationships

is

not

between frequency and resolution.

Counting

Multiplier

Frequency

Hz

KH

z

MHz

Period

Hz

KHz

MHz

0.1

0.0-6000.0

NA

2.0-999.9

NA

0.0-6000.0 0.0-600.0 0.0-6000.0

Resolution

I

-

NA NA

10-2999

NA

0.0-9.99 0.0-29.9

10

NA

Hz

100

NA

0.0-35.0

0.0-99.9

to

1.

The

If

the

blanks

in

its

1000

NA

1,

and the corresponding dBm value. Use the voltmeter to check audio level, bias level, and power supply voltage. The voltmeter operates in generate

or

monitor function. Connect the probe RTL-4011A to the Vert/Sinad / Dist connector. Move the cursor to the mode select position.

Select AC, DC, or DISTORTION mode,

as

required. Implement fixed ranges with special function control techniques.

WARNING

THE

METER'S COMMON LEAD

TO

THE

ANALYZER'S CHASSIS GROUND. DO

ATTEMPT

NOT CUITS WITH WOULD CONNECT

TO

THE

ANALYZER, BECAUSE

THE

MEASURE FLOATING CIR-

FLOATING CIRCUIT TO

IS

CONNECTED

THAT

GROUND! FOR EXAMPLE, DO NOT MEASURE AC

POWER

MAINS WITH

THE

ANALYZER.

SERIOUS SHOCK HAZARD COULD RESULT.

GENERATE FM

PL) 035.0

04) 285.7750 DPL)---

MHZ

RF LEVEL

9.33

+

12.1

uV DBM

V AC

-87.5 DBM

3.00

0

DVM MODE

1)

AC VOLTS

2)

DC VOLTS

3)

DISTORTION

MODE SEL) 1

BAT 11.0V

ANT

FIGURE 3-36.

Figure 3-36 shows an AC DVM display quency and the PL or The bargraph responds to the magnitude in

a modified logarithmic manner to provide a smooth nonranging analog display. Line of

the primary DC power source. MONITORFM

+24.0

DBM

AC DVM DISPLAY

DPL

code in the generate mode.

14

04)

INPUT

LEVEL

V DC

of

the center fre-

of

the voltage

displays the voltage

400.0000 MHz

3.3

+.001

0

DVM MODE

1)

AC VOLTS

2)

DC VOLTS

3)

DISTORTION

MODE SEL) 2

BAT 0.0 V

ANT

300

v

300

.

~

TABLE 3-11. VALID

INPUT

FREQUENCY VERSUS

DISPLAY RESOLUTION

• (DVM/ DIST) DIGITAL VOLTMETER/ DISTORTION MODE

The Analyzer provides an AC-DC voltmeter. The voltage automatically ranges between full scale values

10, 100, and 300 volts. The CRT displays the voltage

of

1,

3-18

FIGURE 3-37.

DC

DVM DISPLAY

~

Figure 3-37 shows a DC DVM display

of

the +

or-

input voltage. In the DC mode, the voltage response to frequencies above

MONITORFM

-30

DBM

03.0

PCT

DVM MODE

50

Hz attenuates at least 20 dB.

04) 285.7750 MHz

INPUT

LEVEL 2.94

DIST/ SINAD

MODE SEL) 3

30.5

mV

DB

l) AC VOLTS

2)

DC VOLTS

ll.O

3)

DISTORTION

ANT

BAT

ATTEN) 0

V

FIGURE 3-38. DISTORTION ANALYZER DISPLAY

Figures

3-38

and 3-12 show displays for the DISTORTION mode which automatically measures fixed frequency

(l

KHz) EIA Sinad/ Distortion in the generate or monitor function. Select mode 3 to obtain measurements.

EXT WATTMETER

l) 2.5

4)

25

7) 250

2)

5)

8)

5

50

500

FWD WATTS

ELEMENT

3)

6)

9) 1000

NO.5

10

100

1.25

2.5

REV WATTS

0.25

2.5

ANT ATTEN)O

FIGURE 3-39. EXTERNAL WATTMETER DISPLAY

• EXTERNAL WATTMETER To measure forward and reflected antenna power, con-

nect Motorola's wattmeter (series ST-1200) with the

front panel phone jack input. The accessories include a wattmeter adapter (RTL-4055B) to accept the external elements. Figure 3-39 shows the External Wattmeter

DISPLAY. Select an entry from one to nine to obtain the appropriate element power range. The CRT displays the nonranging digital reading for the detected power flowing in the forward direction. The bargraph responds logarithmically in proportion to the forward wattmeter reading on a full scale equal to the wattage range

of

the selected element. The detected power flowing in the reverse direction displays similarily. The Analyzer contributes not more than to

the readout error for power levels greater than 10%

of

full scale. Table 3-12 describes the external wattmeter

±

2.50Jo

of

reading

elements.

Frequency

(MHZ)

2-30 2-30

25-60 25-60

50-125 50-125

25-100 25-100 25-100 25-100 250 ST-12078 25-100

100-250 100-250 100-250 100-250 100-250 100-250 250 ST-12178 ST-12578 100

-250

200-250 200-550 200-550 200-550 200-550 200-550 200-550 200-550 500**** ST-12288

500-1000 500-1000 500-1000 500-1000 500-1000 500-1000 500-1000 250*** 500-1000

•, The N type connector 500-1000 MHz frequency range.

••

Calibrated at

•••

Calibrated at

••••

Calibrated at 250 W, useable to full scale.

Maximum

Power Connector Connector

(Watts) Model 250 ST-1296

2500** ST-1299

5

10

5

10

25 50

100

5oo••••

5 10 25 50

100 5oo••••

2.5 5

10

25

50 100 250 ST-12278 ST-12678

2.5 5

10

25

50

100 500•••

is

1000

W, but useable to 2500 W.

125

W, useable to full scale.

"N" Type

ST-12808 ST-12818 ST-12858 ST-12848

ST-12838 ST-12868 ST-12878

ST-12048 ST-12448 ST-1205B ST-1245B ST-12068

ST-12088 ST-12488 ST-12128 ST-12528

ST-12138 ST-12538 ST-12148 ST-12548 ST-12158 ST-12558 ST-12168

ST-12188 ST-12218

ST-12228 ST-12628 ST-12238 ST-12248 ST-12258 ST-12268 ST-12668

ST-12318* ST-12328* ST-12728 ST-12338* ST-12738 ST-12348* ST-12358* ST-12758 ST-12368* ST-12768 ST-12378* ST-12778 ST-12388* ST-12788

recommended for best accuracy

"UHF"

Model

ST-12828

ST-12468 ST-12478

ST-12568

ST-12588 ST-12618

ST-12638 ST-12648 ST-12658

ST-12688 ST-12718

ST-12748

TABLE 3-12.

EXTERNAL WATTMETER ELEMENTS

• INTERMEDIATE FREQUENCY (IF) MODE The Analyzer's

the IF mode

IF

envelope displays on the CRT when

is

selected. Use the

IF

mode to qualitatively and quantitatively assess a transmitter's amplitude modulation envelope.

Type

in

the

'--.,./

3-19

3. 7 OSCILLOSCOPE SECTION

Otspr Sweep

~-

-----

KHz

Vert Sm.-d Otsl

DVM

Vett

Countetln

Ext

V

OSCILLOSCOPE

Honz

E~t

Honz

FIGURE 3-40. OSCILLOSCOPE SECTION

• SCOPE AC OR SCOPE DC 500

The Analyzer provides a general purpose

KHz oscilloscope with calibrated vertical input sensitivities and automatic or triggered horizontal sweep rates (figure 3-40). Both vertical and horizontal inputs may be switched between internal and external sources. Use the

view

scope to analyze waveforms,

modulation signals (generated internally or externally), detect asymmetric modulation or audio distortion, trace signals, and

is

troubleshoot. The vertical input

combined with the BNC port that also serves as the input for DVM, Sinad/ Dist meter, and Frequency Counter. The Cover's accessories include probe #RTL-4011A for vertical and horizontal inputs.

The horizontal time base generator provides a linear

of

100

horizontal sweep from a minimum rate

division to a maximum rate

of 1 us

per division in six

ms

decade ranges selectable with the Horizontal control.

Level

Use the oscillator Trigger

switch in automatic or normal position to synchronize the horizontal time base to the vertical input signal. In automatic mode, the

will

scope scope level set

trigger continuously. In normal mode, the

will

trigger when the vertical signal exceeds the

by

the control. The smaller trigger level control adjusts the level at which a positive going signal triggers the time base. A separate front panel BNC port provides for the External Horizontal input enabled by a seventh position on the time base control switch. The input sen-

per

Sitivlty varies continuously over the minimum range

0.1

from

volt per division to

10

volts per division. Ad-

just sensitivity with the Vert switch and control.

is

The time base

calibrated with the vernier control fully clockwise. Normal operation does not include a character display in either Scope AC or Scope DC mode .

However, if the operator also selects a SWEEP FUNCTION, then the first character line on the CRT identifies the operating center frequency. The synchronized scope displays the swept response symmetrically about the selected carrier center frequency. When Scope AC or

is

Scope DC DISPLAY sweep function, the oscilloscope horizontal input coupled to the sweep signal. When the scope trace

of

the center

the screen ( ± 1 minor division) the instan-

selected in conjunction with

is

at

is

taneous RF output frequency will be equal to the programmed frequency.

NOTE

In all cases the bargraph aids the autoranging digital scale. The bargraph responds in a modified logarithmic manner that provides a smooth nonranging analog display. In other words, the analog display will change the same amount for a 1 volt change at volt change at

250

volts.

volts as for a

25

10

Analog Bargraph

Function

Power Monitor (above 1 Frequency Error

FM Modulation AM Modulation

DVM (AC or DC)

DIST/SINAD Ext Wattmeter

Full Scale Range

w)

0·125w 0-15KHz 0-100KHz 0-100o/o 0-300V 0 to 100% (Dist)

-60db to

Odb

Wattmeter Element

(SINAD)

dependent

0-2.5w to

1000w

SPECTRUM ANALYZER USAGE

The indicated is

30db less than actual input at the RF

rf

signal level in the spectrum analyzer mode

In/Out

port.

When using the spectrum analyzer for measuring harmonics

of

the

rf

carrier, it

carrier to less than -20dbm (RF

50

dbm (Antenna port) with an external attenuator in

-

is

necessary to limit the level

In/Out

port) or

of

less

the

than

rf

order to maintain the correct harmonic relationship to the rf

carrier.

~

3-20

.

~

...

'-.._../ • SELF-TEST DISPLAYS

The self-test check may be executed at anytime during

system operation by executing special function The screens for the different self tests are outlined

If

below. destructive RAM test volatile memory, then stores sequential numbers into RAM to check for any addressing problems in the RAM. displayed, see Figure 3-41. The operator may enter a "0" if he wishes to proceed even if an error exists. operator does not respond in a minute, the testing proceed even without

the self test

If

an error

is

detected, the following screen

an

ADDENDUM

72.

is

initiated by a power up, the

is

performed first.

entry.

It

erases

is

If

the

will

A NON-VOLATILE MEMORY FAULT

HAS BEEN DETECTED.

CONSULT

TROUBLESHOOTING INSTRUCTIONS

FOR CONTINUED OPERATION: PRESS 0 TO CONTINUE PRESS I TO RE- INITIALIZE

THE

OPERATOR'S MANUAL

(PN68P81069A66)

FOR

WITH FACTORY PRESETS

'-..__/

The Test Equipment Service Center should

to remedy the error.

SELF TEST

*ERROR IN VOLATILE RAM*

PUSH 0 TO CONTINUE

FIGURE 3-41.

DESTRUCTIVE RAM TEST ERROR SCREEN

After the destructive RAM test memory, then a non-volatile memory check

see

formed to check to not been corrupted. displayed, see Figure 3-42. reinitialize the non-volatile RAM, a existing non-volatile memory error has been detected, a "0" sists, the battery checked. After a minute, the test will proceed as had been entered.

that a bit pattern stored there has

If

it has, the following screen

on

the microprocessor board should be

is

performed on volatile

If

the operator wants to

"1"

is

desired, even though an

is

entered.

be

is

entered.

If

the error per-

consulted

is

per-

If

the

if

a "0"

is

FIGURE 3-42.

NON-VOLATILE RAM ERROR SCREEN

After the non-volatile RAM test on power up, or if the operator initiates a self test with a special function 72, a checkerboard pattern 3-43. This serves as a visual check verify proper alignment

XX XX

XX

XX XX

XX XX XX

XX XX

XX

XX XX

XX

XX XX

FIGURE 3-43. CHECKERBOARD PATTERN

XX

XX XX

XX

XX XX XX XX

is

displayed on the screen,

of

the CRT.

XX XX

XX

SELF TEST

XX

XX XX

XX

XX XX XX

XX XX XX XX

of

the display to

XX

XX XX

XX

XX XX

see

XX XX

Fig.

XX XX

XX

3-21

A

non

destructive RAM test known characters to each RAM location. read back and verified. The original value replaced.

If

an error

is

detected, the following display

shown; see Fig. 3-44. The

is

performed

operator

that

stores

The

value

is

finally

is

may enter a "0" to continue the self test. Otherwise, the test resumes automatically after

about

a minute.

SELF

COMPLETE

*CHECKSUM ROM NUMBER

Ml

M2

M3

M4

TEST

ERROR

M5

~

IN ROM*

SELF

TEST

COMPLETE

*ERROR IN VOLATILE RAM*

PUSH 0 TO

NON-DESTRUCTIVE RAM TEST ERROR

Next, a checksum check

PROM

this type

ror

program has not changed. The error screen for

of

error

is

shown in Fig. 3-45.

is

detected in

CONTINUE

FIGURE 3-44.

is

performed to verify

an

PROM

If

a checksum er-

device, then an alphanumeric specifier identifies the socket it identifies the

PROM

device in the leftmost socket

microprocessor board, M2 the 2nd from the left,

and

3rd from the left,

"0" to allow testing to proceed.

so on. The

operator

If

no entry

can enter a

is

made in a

minute, the test will proceed automatically.

that

is

in. M l

on

M3

the

PUSH 0 TO

FIGURE 3-45. CHECKSUM ERROR SCREEN

If

a non-destructive RAM error

both detected, then they The testing

tern with a

is

completed with a final checkerboard pat-

"SELF

TEST

CONTINUE

NOTE

and

checksum error are

appear

on the same screen.

COMPLETED"

message.

~

3-22

~

SECTION 4

APPLICATIONS

...___.

4.0 SERVICE SHOP SETUPS

This section

from pocket pagers to repeaters. Analyzer and how to set controls and indicators to obtain the anticipated CRT display. Maintain a permanent written log

of

These are typical applications and are not all-inclusive. Not every test works with every transceiver. Motorola takes no

responsibility for their accuracy, applicability, or safety. Always refer to your own transceiver's service manual for

recommended test methods and specifications. The Analyzer's DVM input

cuits, such

of

the manual guides troubleshooting, diagnosing, and adjusting communications equipment ranging

It

contains information on how to connect equipment under test to the R-20010

all measurements and information important to your operation.

CAUTION

is

unbalanced (ground referenced). Use an appropriate interface to measure balanced cir-

as

certain receiver audio outputs or telephone lines.

4-1

RECEIVER SENSITIVITY TEST

12

DB SINAD

AUDIO DISTORTION

®MOTOROLA

••

r-----.,.,-----

Antoooo

CA~~~~

0'"•

IIPUT

PCIWEII

@

)--DUPLEX

GEN

On

011

®

Output

CAUTION

DDIGT

IIPUT

@

MIWEI

E•tWettmeter

~

RF

SECTION---

""'"'

O

_______

CAUTION

1ZSWIIAX

COJIIIJIIIUIICATIOI$

USJ[JIIIUALTlU

@J00C!l

@]GJ0~

0~00

•lntenstty

@

.,.,,.,.

RFin

®

t~~•:@'§'~

25

0 ' f I 0

25 1

- -

_]

'Ovl /

e

Vert/

Stnad

DVM/Co~omter

~

POWER

On

@st•ndby

DeOU

....

AC

OvenReildy

i

RfScan

·q·

MH<

'~'~''-

/@''~'"""

- +

to

//

A~o~to

"/Co

l p,.,,_

tDIII

@

In

•

O Hortl

I\

NOfmet

Vert

0

r©\

~~~~."

... 0

ht

"'

E•tHonr

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FUNCTION GENERATE FM

DIGITAL

DIST

READING

ANALOG SINAD

INDICATOR

NEG DEVIATION

FIGURE

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MOBILE

RECEIVER

PL) 100.0

RF LEVEL

lOOOuV

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RECEIVER SENSITIVITY TEST

12

DB

SINAD

AUDIO DISTORTION

Use the R-20010 signal generator

1.

As shown in figure 4-1, connect the Analyzer's nect the Analyzer's Vert/ Sinad/ Dist

2.

Set

DISPLAY

3. Select the

4.

Adjust

1KHz Level control for

tion, set

a. With a

to

Gen /

Mon

RF

carrier frequency from

MODULATION

lOOOuV

RF input level, adjust the volume control

and

Mtr

600Jo

switch

SINAD

to

mode. Select a

of

to

Off

meter to measure a receiver's performance by the following procedure:

RF

In/

the receiver's audio

FUNCTION

an

RF

Memory table channel number

rated deviation as indicated

and

Ext Level control

Out

to

the

antenna

output.

to

Disable all PL's

and

set the

on

the

to

Off.

rated audio power

the receiver be set to produce rated audio power before measuring 12dB SINAD.

b. Read

5. Set about

% distortion directly from the DIST / SIN

RF

Step

2uV.

attenuator

Adjust

to

the

attenuator

-llOdB

and

(IOdB steps)

AD

scale.

the variable control to mid-range.

and

the variable RF control until a 12dB

the display.

6.

From

the

RF

LEVEL on the display, read the receiver's 12dB

SINAD

sensitivity in uV and dBM.

connector

FUNCTION

or

CRT. To

The

of

the receiver under test.

and

open the Squelch.

switch

to

Generate.

enter directly from the keypad.

prevent spurious noise modula-

output.

EIA

RS-204-C specifies that

display's RF LEVEL should indicate

SINAD

reading appears

Con-

on

'-.../

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4-3

RECEIVER SENSITIVITY TEST

20

DB

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nANT

SPEAKER

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GENERATE

PL ...

0.50uV -117.0 DBM

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FM

RF LEVEL

DVM

MODE

AC VOLTS

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DISTORTION

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FIGURE 4-2.

20

DB QUIETING TEST SETUP AND DISPLAY

4-4

1.

Connect switch

2.

Turn

rated

3. Set REF

the Analyzer

to

Monitor

on

the

receiver (unsquelched)

audio

power).

FUNCTION

above (O.lOX

and

Read

switch

the

to

the receiver

select

FM

or

and

the

audio

to

Generate. With all

REF

Voltage).

RECEIVER SENSITIVITY TEST

20 DB QUIETING

under

test, as shown in Figure 4-2. Set

CW

FUNCTION

turn

up

the receiver

noise voltage fed

modulation

.

audio

to

the Analyzer.

off,

adjust

gain

to

RF

feed

Note

DISPLAY

audio

to

noise

DVM / DIST,

to

the

Analyzer (at least 1 I 4

the noise reading (REF) in dBm.

LEVEL

until display reads 20 dB less

FUNCTION

than

\.._/

4. Read

screen.

the

RF

LEVEL

reading required

to

produce

20 dB quieting in uV (left side)

and

dBm (right side)

on

the

CRT

·

~

4-5

SQUELCH SENSITIVITY TEST

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RECEIVER

FIGURE 4-3. SQUELCH SENSITIVITY TEST SETUP

~

4-6

...----....

1.

'----"' 2.

Connect the Analyzer switch to Generate FM,

To

check

PLIDPL

to

Cont

in the

PLIDPL

to

squelch sensitivity, enter the proper

SQUELCH

the receiver under test, as shown in figure 4-3. Set and

enter the frequency

Mode.

SENSITIVITY

of

the receiver under test.

PLIDPL

TEST

code from the keypad. Set

DISPLAY

to

Gen/

Mon

Mtr,

MODULATION

FUNCTION

switch

'--....--'

Adjust

3. To

4. Place the point where the receiver

5. Return until the receiver

a.

b. Determine the tight squelch sensitivity

6. Enable the receiver's minimum, as in step 5, until the receiver's squelch just opens. On the display, read the coded squelch sensitivity in uV or

Set DISPLAY to Gen/ Mon Mtr

1.

2.

Adjust deviation on the DEY KHz scale.

the Code Synth Level control to provide a nominal

check carrier squelch,

FUNCTION

just

On

the display, read minimum squelch sensitivity as uV

receiver.

set to maximum tightness.

dBm.

attenuator

and

turn

off

all modulation.

switch to monitor to remove the

just

barely quiets.

switch

to

Generate. Increase the RF LEVEL by adjusting the

unsquelches .

of

PL/DPL

Variable controls to 1000

squelch circuit. Fully open the carrier squelch control. Increase the

AUDIO

and

FUNCTION

Push

the Variable control in

the receiver by repeating steps 4

POWER

uV

750Hz

RF

output

OUTPUT

switch to Generate

(-47 dBm).

(500Hz-

from the receiver. Set the receiver's squelch control to

or

dBm. This

TEST

Adjust to

select the RF In/

1 KHz) deviation

attenuator

is

the threshold squelch sensitivity

and

5 with the receiver's squelch control

FM.

Enter the RF frequency

the 1 KHz Level control to

Out

of

and

connector.

the

PL/DPL

Variable controls

RF

LEVEL from

and

PL

60%

of

the rated

code.

of

code.

the

Change

3.

Connect a suitable resistive load, that can dissipate the receiver's rated audio

4.

ceiver uses a "floating" Connect a scope probe to the Analyzer's Vert/ Sinad / Dist input connector and clip the probe across the load resistor

5.

or

Connect the

6.

reading

7.

Calculate the audio power

8.

If trace through the audio stages

DISPLAY

to the isolation transformer.

on

the DVM

the receiver does not produce rated audio power

RF

In /

to DVM/ Dist

or

"bridge"

Out

to

AC

scale which does not have clipping

and

use the keypad to select DVM

output

the receiver's

output

by the following formula:

Power

and

Out

locate the problem.

amplifier, connect a

antenna

(Watts)·=

1:1

port.

Adjust

output,

the receiver's volume control for the highest voltage

or

other distortion in excess

(AC Volts)2

Load Resistance (Ohms)

use the Analyzer's

AC

function.

output,

isolation transformer across the load resistor.)

in place

OSCILLOSCOPE

of

radio specs.

the speaker.

and

a scope

(If

probe

there-

to

4-7

fl''"

LIMITS

LOUDSPEAKER

USAGE

FOR

I

'"•

..........

'-.....

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

'-.....

"--..

AUDIO FREQUENCY RESPONSE

~

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

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

......_....,.

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

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.....,_

<:::

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

..........

dB

REFER

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~

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~

300

3

HZ

1

KHZ

LIMITS HEADPHONE

LINE

FIGURE 4-4. AUDIO FREQUENCY RESPONSE; EIA STANDARD RS-204C

FOR

OR

USAGE

~

4-8

AUDIO FREQUENCY RESPONSE

"-.__..,.

Use the keypad to enter the frequency

1.

Set FUNCTION to Generate FM, attenuator and Variable level controls to 1000 uV (-47 dBm).

2.

Select tone memory display and set Tone A to 1000Hz. Set

3.

to Tone A, Adjust the Code Synth Level control for

4.

and

change DISPLAY to Gen/ Mon Mtr.

5KHz system. Change DISPLAY to DVM/ Dist and select DVM

Connect the Analyzer's RF

5. In/Out probe.

connector. Connect the Vert/ Sinad / Dist input connector to the receiver's speaker

If

the speaker

In/Out

is

"floating", use an isolation transformer to avoid shorting the

6. Adjust the receiver's volume control to obtain a reference level reading

and PL/

DPL

code (if any)

of

MODULATION

200fo

of

rated deviation on the DEY KHZ scale, for example: 1 KHz in a

AC

out to the receiver's antenna port.

the receiver under test.

switch to Cont, Code Synthesizer Mode

function. Push

the Variable control in to select the RF

on

the

output

AC

volts scale which

output,

stage.

is

using a scope

free

of

clipping

at any frequency within the 300 to 3,000 Hz band. Note this reading in dBm as the reference value.

7. Refer to the audio response curve in the receiver's Service Manual. Change the Tone A frequency on the tone memory screen to the value for each point

8.

Maintain FM deviation at 20%

audio level

at

this frequency. Note this audio level. Repeat this step for each frequency tested.

of

the rated deviation, as set

9. EIA RS-204C specifies the frequency response for NBFM receivers over the range

a. Audio response for receivers using loud-speakers shall not vary more

on

the curve to be measured.

in

step 4. Change DISPLAY to DVM

than

+ 2 dB

AC

and read the

of

300 to 3000 Hz as follows:

or

-8

dB from a standard 6 dB

per octave curve, with reference taken as 1000 Hz.

~

b. Audio response for receivers using either headphones

from a standard 6 dB per octave curve, with reference taken

10.

Add

or

subtract the

1KHz

reference value from each reading taken in step 7. Plot the resulting values

compare them with the 6 dB per octave curve in your receiver's Service Manual

tion RS-204C, as shown

1.

Perform the

12

dB SINAD Sensitivity Test with the Analyzer in the same setup as shown in figure

in

figure 4-4.

MODULATION

ACCEPTANCE

necessary to perform this test with the volume control set to 10%

2.

Increase the RF

creased 6

3.

Turn the 1 KHz Level control clockwise to increase the deviation until the SINAD level returns to amount

of

output

dB=0.7

deviation

level 6 dB above the

12

dB SINAD level, to double the voltage . For example, 0.

uV.

on

the display as the modulation acceptance bandwidth

4. A typical modulation acceptance value for a receiver under test. Any loss receiver's

IF

circuit.

of

modulation acceptance bandwidth indicates improper alignment

or

telephones lines shall not vary more

at

1000 Hz.

or

with the standard EIA specifica-

BANDWIDTH

of

rated audio output.

of

the receiver.

is

7 KHz. Refer to the specification for the specific receiver

or

a component failure in a

than

+ 1 dB

or

on

a curve

4-l.

Note:

35

12

dB. Read the

-3

uV

dB

and

It

is

in-

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Use this test to insure proper preselector alignment for multi-frequency receivers. Tune the preselector for greater rejection

of

an interfering frequency from nearby transmitters .

1.

Connect the Analyzer's RF In/ Out to the antenna connector

of

the receiver under test. Connect the Analyzer's Vert/Sinad/ Dist to the RF probe. Connect the probe to the first available low impedance point following the preselector, as shown in figure 4-5.

2. Disable the receiver's mixer injection.

3.

Set DISPLAY to Scope DC, FUNCTION to SWP

10

clockwise to

MHz.

1-10

MHz with switch in Generate, and Dispr/ Sweep control fully

4. Enter the proper receiver frequency.

5.

Set RF Step attenuator to

6.

Use the OSCILLOSCOPE Vertical control to move the horizontal sweep line to the bottom

OdB

and RF Variable control to mid-range.

of

the graticule. Set the

Ext V / Div control to 0.01 and its inner knob fully clockwise to Cal position.

7.

Adjust the RF output level to produce a CRT display

at

the lowest readable level to minimize the possibility

of

over-

loading the circuits being tested.

(.

707

of

8. The 3db

peak) and 6db (.50

responds to 1 MHz with dispersion control fully clockwise and to

of

peak) bandwidth points can be checked. Each major horizontal division cor-

.1

MHz with dispersion control fully counterclockwise. The response should be checked for uniformity and symmetry. Tuning adjustments can be made accordingly.

"--/

4-11

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FIGURE 4-6. FREQUENCY

4-12

TEST

ADJUSTMENT

SETUP

~

RECEIVER FREQUENCY ADJUSTMENT

I. Connect the Analyzer to the receiver under test, as shown in figure 4-6.

'---"'

2. Set DISPLAY to Spectrum Analyzer (1.5 uV sensitivity). receiver's local oscillator for approximiate frequency

3. Change DISPLAY to Gen/ Mon Mtr and

that

receiver so

4. Change input to fully quiet the receiver and adjust discriminator to zero volts DC for receivers requiring such For receivers with

quency for minimum distortion

5.

For pagers with the battery saver feature, check the local oscillator for pulse operation without removing the unit from its housing.

FUNCTION

the local oscillator signal

to Generate and enter the proper carrier frequency. Introduce sufficient signal level into the RF

quadrature

or more critical detectors, adjust detector tuning control

or

best SINAD performance.

FUNCTION

is

coupled to the Monitor input.

Enter

the proper local oscillator frequency. Check the

and

spectral purity.

to Monitor. Place pick up loop in close proximity to the

an

adjustment.

or

local oscillator injection fre-

'----"'

~

4-13

BASIC FM TRANSMITTER TESTS

POWER, FREQUENCY, AND DEVIATION

~

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TRANSMITTER

FIGURE 4-7. TRANSMITTER TESTS SETUP

4-14

MIC

AUDIO

IN

~

'--"'

BASIC

POWER,

A. Basic Terminated Measurements

1.

Connect the Analyzer's RF In/ Out to the RF shown in figure 4-7.

For

power

output

Analyzer's antenna port. The built-in RF load dissipates up to 50 W for three minutes and up to

a high-power transmitter into the Analyzer for a time long enough to threaten overheating the power-measuring circuitry, the system's audible alarm sounds and the display changes to read the to un-key.

measurements, connect a transmitter only to the Analyzer's

FM

TRANSMITTER

FREQUENCY,

output

CAUTION

TESTS

AND

DEVIATION

of

the unit under test and make the other connections as

RF

In/Out.

125

W for one minute.

RF

Do

not connect it to the

If

a technician keys

LOAD OVER-TEMP warning

2. Set DISPLAY to Gen/ Mon Mtr, old. Enter the correct transmitter carrier frequency via the keypad

3. Set the unsquelch the monitor. display. Accurate measurements require sufficient signal level from the radio to fully quiet the Analyzer's Monitor receiver.

4. Use good quality cables ment, especially

5.

Read any transmitter frequency error indicated on the display.

6. Refer to the radio's service manual to determine

termine

7.

Proceed to check a.

b. Key

c.

attenuator

if

any adjustments are required.

Turn

off

deviation from the transmitter.

up

transmitter with appropriate

DISPLAY. Refer to radio service manual to determine

With

PL justing the 1 KHz LEVEL control. Check service manual to determine the minimum level required for proper MIC

sensitivity as well as the maximum level required to insure proper

on

the DVM by temporarily switching the DISPLAY to

to

-30

dB.

Too

of

at

UHF

and above. Key the transmitter and read the power indicated

MODULATION

all modulation sources at the Mod

or

DPL

modulation properly set, introduce 1 KHz modulation to transmitter audio input by ad-

FUNCTION

For

low-power transmitters, it may be necessary to reduce the

high

an

attenuator

minimum length because cable-loss can be a significant factor in RF power measure-

as follows:

switch to Monitor

setting

if

Out

PL

or

DPL

FM,

and

MONITOR

or

RF

Memory table.

or

too tight a squelch setting inhibits the frequency error

POWER

of

enabled

and FREQUENCY are within spec limits and de-

the Analyzer in order

and

read DEVIATION from the

if

adjustment

DVM/DIST,

to

is

necessary.

IDC

function. Read

ACVM.

Squelch control to thresh-

attenuator

on

the display.

check the level

of

GEN/MON

MOD

setting to

PL

or

OUT

DPL

MTR

levels

At

the maximum audio input level, read DEVIATION

d.

mum rated system deviation specified in the radio's service manual. Make adjustments as required.

e. Verify proper MIC sensitivity by setting Mod

and

reading corresponding DEVIATION on the display.

B.

Off-The-Air Measurements.

1.

Connect the TEKA-24A pick up antenna to the Analyzer's able the

2. Operate the transmitter under test either into its own antenna

3. Set DISPLAY to old, and enter the correct carrier frequency.

antenna

port.

Gen/Mon

Mtr,

FUNCTION

Out

Level

SWITCH

4-15

on

the display and verify

to

the minimum threshold level per the service manual

antenna

to Monitor

connector. Pull the Variable control

or

into a dummy

FM,

MONITOR

that

it falls within the maxi-

RF

load, as shown in figure 4-7.

Squelch control

to

out

to

en-

thresh-

BASIC FM TRANSMITTER TESTS

POWER, FREQUENCY,

AND

DEVIATION

4. Adjust the attenuator as in step A-3 above, to produce an adequate signal level to the Analyzer's Monitor receiver.

5. Adjust the transmitter and follow the same procedure outlined in steps A-5 through A-7 above, to measure frequency

6. This same method may be used to verify frequency attenuator setting to fully realize the 1.5uV for 10db SINAD sensitivity

function.

in step A-3 above.

C. "In-Line" Power Measurements

1.

Referring to figure 4-8, connect the RTL-4055B in-line wattmeter adapter with the appropriate ST-1200 series element in the 50 ohm antenna line with the arrow pointing towards the antenna. Plug the adapter's cable into the Analyzer's Ext Wattmeter jack. Refer to table 3-12 in this Manual for further description

2.

Set DISPLAY to Ext Wattmeter, FUNCTION switch to Monitor FM, FUNCTION switch and attenuator do not function the

3. Use the keypad to select the scale that corresponds to the ST-1200 element in use.

4.

Key

and

deviation.

To

insure sufficient measurement accuracy however, make sure the Monitor receiver

RF

In/

Out

connector.

the transmitter. Read forward

and

reflected power

and

deviation

but

should be set in case RF power

on

of

a remotely located transmitter by reducing the

the display.

of

and

the Analyzer's "of-the-air" monitor

is

fully quieted as

of

elements.

the attenuator to

-30

dB. In this step,

is

inadvertently applied to

,--.....,.

4-16

,--.....,.

BASIC FM TRANSMITTER TESTS

POWER, FREQUENCY, AND DEVIATION

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FIGURE 4-8. TRANSMITTER TEST SETUP;

4-17

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TRANSMITTER

FIGURE 4-9. AUDIO DISTORTION SETUP

4-

18

~

.

'---

1.

Before starting this test, adjust the transmitter's

to

2. Connect the Analyzer

Turn

off

the

3.

MODULATION

the transmitter, as shown in figure 4-9.

switch. Disable

AUDIO DISTORTION

IDC

to specification.

PL

or

DPL.

4. Key the transmitter Gen /

Mon

Mtr DISPLAY.

5. Select DVM/ Dist Unkey the transmitter.

and

adjust

DISPLAY

the 1 KHz

and

mode 3, DIST/

MOD

Level control for

SINAD

600Jo

of

full-rated transmitter deviation

. Read transmitter %

DISTORTION

on

the

from the display.

4-19

®MOTOROLA

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4-10.

AUDIO

FREQUENCY

4-20

MIC

n

RESPONSE

AUDIO

SETUP

IN

~

AUDIO

1.

As shown in figure 4-10, connect the Analyzer's RF

FREQUENCY RESPONSE

In/Out

port to the transmitter's RF output and the

Vert/Sinad/

Dist input jack to the Mod Out jack through a BNC tee fitting connected to the transmitter's microphone audio input.

PL

Disable

2.

Select DVM/Dist DISPLAY and set it to mode

MODULATION to Cont and Tone A. Use the keypad to enter the transmitter frequency. Turn

and DPL.

1,

AC DVM. Set FUNCTION to Monitor FM, attenuator to

off

the

1KHz

-40 and Ext

Mod controls.

3.

Set DISPLAY to Signaling Sequence. Use the keypad to enter mode I,

A/B

encode, Tone A and enter the frequency

to be tested.

4.

Set DISPLAY to

Gen/Mon

Mtr, key the transmitter, and adjust Code Synth Level control to provide

300Jo

of

transmitter deviation.

5.

Change DISPLAY to DVM/Dist. Note both the transmitter MIC Audio input level in dBm and the test frequency, for later use.

6.

Repeat the above procedure, adjusting Code Synth Level to maintain 30%

of

rated deviation, for each frequency to

be tested.

7.

Plot the data points obtained above in db relative to the I KHz Level and compare with the transmitter's specifications. EIA RS-152B specifies that a transmitter's frequency response be within

300

pre-emphasis from

to 3000 Hz

(6

dB per octave roll-off allowed between 2500 and 3000Hz). Refer to figure

+ 1 or -3 dB

of

a + 6 dB per octave

below, Frequency Response diagram.

dB,

rated

4-11

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I

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db

10.5 db

300

Hz

>r~<

1000

Hz

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2500 3000

Hz

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Hz

FIGURE 4-11.

AUDIO

FREQUENCY RESPONSE; EIA

4-21

STANDARD

RS-1528

AM MODULATION TEST

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TRANSMITTER

FIGURE 4-12. AM MODULATION TEST SETUP

~·c

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J

4-22

/"'-..

AM MODULATION TEST

1.

Connect the Analyzer's RF In / Out to the output connector

AM

FUNCTION to Monitor

2.

Connect the Analyzer's Mod Out connector to its Vert/ Sinad/ Dist input connector and to the transmitter's micro-

.

of

the transmitter under test,

as

shown in figure 4-

12.

Set

phone input using a BNC tee connector.

3.

Set DISPLAY to DVM/ Dist and the AC voltmeter function.

4. Adjust the 1 KHz Level 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

6.

To check the transmitter's distortion, connect the Analyzer's Demod

jack. Set DISPLAY to DVM/ Dist and Distortion. Read

OJo

AM on the display. Change to IF DISPLAY to observe the RF envelope's distortion.

Out

connector to the Vert/ Sinad/ Dist input

OJo

distortion on the display.

'....__/

4-23

AM MODULATION LINEARITY TEST

1.

Connect the Analyzer's RF

2.

Connect the OSCILLOSCOPE Ext Horiz input connector to the scope probe. Set Horiz control to Ext, DISPLAY to Gen/Mon

3. Change DISPLAY to IF and set FUNCTION switch to Monitor. Connect the Analyzer's Mod Out jack to the transmitter's microphone audio input.

Mtr, and set to correct transmitter frequency.

In/Out

to the output

of

the Transmitter under test, as shown in figure 4-13.

4. Connect the scope probe to the secondary

Do not exceed 300 volts maximum to the Analyzer's DVM input.

5.

Key

the transmitter. Adjust the 1 KHz Level control to cause the displayed trapezoid figure to come to ·a point at one end. This corresponds to display just fill the screen.

6.

Observe the resulting trapezoid figure. The top and bottom sides indicates non-linearity in the transmitter final amplifier stages.

®MOTORO&;A

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AM modulation.

C

..

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of

the transmitter modulator stage output transformer.

CAUTION

If

necessary, adjust the horizontal vernier control to make the

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TRANSMITTER

FIGURE 4-13. AM MODULATION LINEARITY TEST SETUP

TO

MIC

ri

4-24

r----

ANALYZER

IF

DISPLAY

INCIDENTAL

UNMODULATED

AM

MODULATION

AM

FM

CARRIER

MODULATED

WITH

X::.

INCIDENTAL

PEAK

FM

CARRIER

AMPLITUDE

AM

\......_/

Y::.

Figure 4-14 shows a typical

FIGURE

IF

DISPLAY, its modulated FM carrier with incidental AM, and a formula for calculating

4-14. ANALYZER

AM. Use the IF mode to view the modulation envelope modes), and to check AM depth

of

modulation. Because the IF DISPLAY provides only a qualitative indication, use the

VALLEY

cr,

AM=-

IF

DISPLAY

of

the RF signal, to detect and examine incidental AM (in FM

x-v

X+Y

AMPLITUDE

X·

100

Monitor DISPLAY with AM Monitor FUNCTION to determine precise AM measurements.

o/o

4-25

COMMUNITY REPEATER MODULATION

1.

Connect the Analyzer to the repeater under test

PL

nity Repeater. Disable the receiver

2.

Set DISPLAY to DVM, FUNCTION switch to Monitor FM, and MODULATION switch in

BW

MONITOR

3.

Set the attenuator to -30 dB. For low-power transmitters, it may be necessary to reduce the attenuator setting to un-

switch to narrow, Squelch control to threshold, and Duplex Gen switch to off.

and set the squelch to threshold.

as

shown in figure 4-15. The diagram illustrates a MICOR Commu-

off

position. Set

squelch the monitor. Too high an attenuator setting or too tight a squelch setting inhibits the modulation deviation display.

4.

Enter the proper transmitter frequency.

5.

Move the display cursor down to DVM and enter I for AC mode. Adjust the 1 KHz Level control for 1 VAC, indicated on the display, to put 1 volt

of

1 KHz test tone into the transmitter modulation limiter.

~

6. Set DISPLAY to Gen/Mon Mtr.

Key

the transmitter. Adjust the transmitter IDC control for 4 KHz DEV indicated

on the display. Un-key the transmitter.

7.

Disconnect the cable from the Duplex Gen output to the receiver antenna to prevent the transmitter from keying up

on repeat.

8.

Disconnect the cable from the Mod Out connector, leaving SINAD IN connected to test point at the repeater level.

9. Set DISPLAY to Duplex Gen, FUNCTION switch to Generate FM, and Duplex Gen switch to On. Set the MONITOR Image/Duplex switch to High or Low as required. Enter the proper offset frequency.

10.

Move the display cursor down to PL or DPL and enter a

11.

Turn

off

the 1 KHz Level control. Set MODULATION switch in the Cont position and adjust Code Synth Level

PL/DPL

code used

in

the repeater.

control for 0.75 KHz DEV indicated on the display.

12.

Set FUNCTION switch to Monitor. Reconnect the cable from the Duplex Gen Output to the receiver antenna connector. The transmitter should now key-up.

13.

Adjust the

PL

deviation control in the repeater controller for 0.75 KHz repeated

PL/DPL

code indicated on the

display.

14.

Set FUNCTION switch to Generate and adjust the (0.75 KHz

15.

Set DISPLAY to DVM, FUNCTION switch to monitor, and turn the repeat level to minimum. Slowly increase the

PLIDPL + 4KHz

test tone = 4.75 KHz).

repeat level control until the proper voltage

1KHz

Level control for 4.75 KHz DEV indicated on the display

is

indicated on the display.

~

16.

Change DISPLAY to

17.

Disconnect the cable from the Duplex Gen Output to the receiver antenna. The repeater should un-key.

18.

Radiate a weak signal from the Duplex Gen Output to simulate the weakest signal that will be repeated. Adjust

Gen/Mon

Mtr. Confirm that the repeated modulation

is

4.75 KHz.

squelch key control on the squelch gate module to the point that the transmitter just keys-up.

4-26

~

COMMUNITY REPEATER MODULATION

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FIGURE 4-15. COMMUNITY REPEATER MODULATION SETUP

4-27

1.

Set-up this

station

in two steps:

WIRE LINE REMOTE BASE MODULATION

Transmitter

modulation

and

phone

line levels.

2.

Connect

3. Set switch to

4. Set the squelch the

the Analyzer

DISPLAY

narrow

attenuator

monitor.

display.

5.

Enter

the

proper

1

KHz

Level control for 1 V

tion

limiter.

6. Set

DISPLAY

dicated

on

the display. Un-key the transmitter.

7. Follow the base

to

DVM,

and

squelch

to

-30 dB.

Too

transmitter

to

Gen/

station

the

transmitter

FUNCTION

control

For

low-power transmitters, it may be necessary

high

an

under

switch to

to

threshold.

attenuator

test as shown in figure 4-16.

Monitor,

setting

frequency. Move the display cursor

AC

Mon

phone

indicated

Mtr.

Key the transmitter

level setting outlined in the next procedure .

on

the display,

or

and

MODULATION

too

tight a squelch setting inhibits the

down

to

DVM

to

put

1 volt

of 1 KHz

and

adjust

the transmitter.

switch

to

reduce the

and

test

to

off.

Set

MONITOR

attenuator

setting to un-

modulation

enter 1 for

tone

IDC

AC

mode.

into the

transmitter

control for 5 KHz DEY in-

deviation

Adjust

modula-

~

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the

~

4-28

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DRIVER

WIRE

LINE

~t

BASE

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:

I

4-29

WIRE LINE REMOTE BASE

PHONE

LINE LEVELS

A. Phone Line Levels

1.

Perform the Transmitter Modulation procedure, outlined

in

the previous method, before proceeding with the

phone line level adjustments.

2. Connect the Analyzer to the base station under test as shown in figure 4-17. Connect RF

In/Out

connector and Mod Out - DVM/Counter In connector to the station phone line input.

CAUTION

600

Disconnect the telephone line from the base station and connect a will

introduce hum and noise that will cause erroneous readings.

3.

To measure levels across a balanced phone line, refer to paragraph

ohm load across the input. Failure to do so

D.

To generate signals across a balanced phone

line, refer to paragraph E.

B.

TRANSMIT Line Input

1.

Set DISPLAY to DVM, FUNCTION switch to Monitor FM, and MODULATION switch to off. Set MONITOR BW

switch to narrow and squelch control to threshold.

2.

Set attenuator to -30 dB. For low-power transmitters, it may be necessary to reduce the attenuator setting to unsquelch the monitor. Too high an attenuator setting or too tight a squelch setting inhibits the modulation deviation display.

3.

Enter the proper transmitter frequency. Move the display cursor down to DVM and enter 1 for AC mode.

~

to the antenna

4.

Adjust the 1 KHz Level control for the DBM level expected from the remote control console. The typical value

-16 dBm

5.

Remove the cable from the DVM/Counter In connector coming from Mod Out. Connect the cable coming from

will

be

+I

-4

dB

of

most actual levels.

the line driver output to DVM/Counter In.

6.

Adjust the exciter level control on the station control module for the value stamped on the exciter,

as

the display.

7.

Set DISPLAY to Verify that modulation

Gen/Mon

is

Mtr. Make a line push-to-talk by applying the proper control signal to the input line.

5 KHz.

C. RECEIVE Line Output

1.

Disconnect the cable from the Mod Out and DVM/Counter In connectors. Connect the cable from the receiver line driver output to the DVM/Counter ln.

2.

Set DISPLAY to Gen/Mon Mtr, FUNCTION switch to Generate FM, and MODULATION switch to off.

3.

Adjust the 1 KHz Level control for 5 KHz DEY indicated on the display. Set the attenuator to -30 Variable control to mid-range.

4.

Set DISPLAY to DVM. Enter the proper receiver frequency. Move the display cursor down to DVM and enter 1 for AC mode.

5.

Adjust the line level control on the line driver module for the desired level on the phone line. A typical value for

is

carrier - type lines

0 dBm.

of

indicated on

dB

and the

~

4-30

r---..

WIRE LINE REMOTE BASE

PHONE

LINE LEVELS

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DRIVER

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WIRE

PHONE

-:

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STATION

:

1

I

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TRANSMITTER

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LINE LEVELS SETUP

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4-31

WIRE LINE REMOTE BASE

PHONE

LINE LEVELS

D. MEASURING LEVELS ACROSS A BALANCED LINE

1.

Use a BALUN (balanced-to-unbalanced) device because

be

The BALUN must

high impedance

(6K

ohm or more) to make bridging measurements without upsetting levels.

of

the unbalanced nature

of

the

DVM/

Counter In jack.

2. Connect the BALUN's balanced side (high impedance) across the phone line. Connect the BALUN's unbalanced

side to the DVM/Counter In jack, as shown in figure 4-18. Set the BALUN switch in the OPEN position.

3.

Set DISPLAY to DVM AC mode. Measure the test tone level on the phone line by interpolating the AC VOLTSDBM scale on the display.

4.

Set DISPLAY to Scope AC. Analyze waveform and measure AC volts peak-to-peak

by

interpolating the volts per

division.

5.

With the BALUN switch in the OPEN position, the BALUN represents a nominal 10db insertion loss from the

of

Odbm

will

balanced side to the unbalanced side. For example, an actual line level

indicate

-10

dbm at the DVM

input. Characterize your unit before use.

/"'-..

4-32

WIRE LINE REMOTE BASE

PHONE

LINE LEVELS

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BALUN

R.T.L.

25CB4202A01

T201

FROM

T1380

I

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E

LINE

FIGURE 4-18. BALUN SETUP; MEASURING LEVELS

DRIVER

4-33

MODULE

WIRE LINE REMOTE BASE

PHONE LINE LEVELS

E.

GENERATING

1.

Connect the BALUN's balanced side (600 ohm) to the phone line, as shown in figure 4-19. Disconnect any other equiment (consoles, etc.) connected to the line. Connect the BALUN's unbalanced side

SIGNALS ACROSS A

BALANCED

LINE

to

the Mod

Counter In jack.

2. Set

DISPLAY

desired on the line, as interpolated from the DBM scale. A typical value for carrier-type lines

to DVM

AC

mode

and

FUNCTION

switch to Generate. Adjust the 1 KHz Level control

is

0 dBm.

Out-

to

r---...

DVM/

the level

3. Set DISPLAY

to

DVM

AC

mode,

FUNCTION

switch to Generate,

and

1KHz Level control to

generate tone remote control commands.

4. Set

MODULATION low-level guard tone will go out. Adjust Code Synth Level control for phone line, as interpolated from the DBM scale. This

5. Switch to Burst position each time

6. Connect the service microphone into the Analyzer's

6 dB higher

7.

With the BALUN switch in the CLOSED position, the BALUN represents a nominal

than

unbalanced side to the balanced side. ohm

line. Characterize your unit before use.

switch to

Cont

Tone Remote. High-level guard tone, function tone,

that

a tone remote control command sequence

the desired test tone level.

For

example, a modulation

-30

dBm level

is

equivalent to 0 dBm speech test tone level.

MIC

jack. Adjust the Ext. Level control for voice peaks

output

of

Odbm will be a Odbm input into the

and

then the continuous

of

low-level

is

desired.

Odb

guard

insertion loss from the

off

position to

tone

on

the

about

600

~

4-34

~

WIRE LINE REMOTE BASE

PHONE

LINE LEVELS

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FIGURE 4-19. BALUN SETUP; GENERATING SIGNALS

3.1K

2SCI4202A01

T20

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FROM

T1380

I

I I

_j

4-35

BANDPASS CAVITY TUNING

Use this procedure to peak-tune bandpass cavities, duplexers, crystal filters and other bandpass devices. Tune the bandpass to center frequency. After tuning, use normal gain or loss measuring techniques to measure insertion loss.

1.

Connect the Analyzer to the device under test, as shown

In/Out

to the cavity's output connector. When tuning a bandpass duplexer, connect the RF

in

figure 4-20. When tuning a single cavity, connect the RF

In/Out

to the duplexer's

antenna port.

2. Set DISPLAY to Duplex Gen, FUNCTION switch to Generate, and attenuator to -lOdb.

3.

Change the FUNCTION switch to Monitor. Enter pass frequency on the display. Set the offset to 0 MHz.

4.

Change DISPLAY to Spectrum Analyzer. Set Dispr /Sweep control fully clockwise to

10

MHz. Turn the Duplex

Generator on.

5.

Tune the cavity, or both cavities in the duplexer leg, to a peak indication on the display's center graticule. The single

is

cavity

ready for service.

6. For duplexer tuning, move the output cable from the Duplex Gen Output connector to the duplexer's other end.

4.

Put

Repeat steps 2 through

the duplexer into service. Check the duplexer for insertion loss according to its

specifications.

r--.....

~

4-36

~

®MOTOROLA

••

BANDPASS CAVITY & DUPLEXER TUNING

C

OMI

SYS

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BANDPASS ADJUSTMENT

A. Passband Adjustment

1.

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2. Set DISPLAY to

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to the in-service duplexer antenna port

as

shown in figure 4-21.

Mtr, FUNCTION switch to Generate FM, and MODULATION switch to

tion.

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Enter the receiver frequency.

4.

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-30

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of

5. Tuqe the pass-band knobs

the cavities in the duplexer receive leg, for a peak reading on the receiver limiter meter. Reduce the signal generator output, as necessary, to keep the receiver limiter meter reading below saturation. This completes the pass-band adjustment for the receiver leg.

-30

6. Set the FUNCTION switch to Monitor FM and the attenuator to

dB. For low-power transmitters, it may

necessary to reduce the attenuator setting to unsquelch the monitor. Too high an attenuator setting or too tight a

will

squelch setting

inhibit the display

7. Enter the transmitter frequency. leg

transmit

for maximum power output. This completes pass-band adjustments.

of

frequency and deviation information.

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4-39

CAVITY & DUPLEXER TUNING

BANDPASS WITH REJECT NOTCH

B. Adjustment

1.

Connect the Analyzer's RF In / Out to the in-service duplexer

of

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Leg

as

shown in figure 4-22. Disconnect the cable at the duplexer receiver port that comes from the receiver. Move the Analyzer's RF In/ Out cable from the duplexer antenna port to the duplexer receiver port. Connect a power-rated dummy load to the duplexer antenna port.

2.

Set DISPLAY to Spectrum Analyzer, FUNCTION switch to Monitor, and attenuator to -30 dB. Verify that the display's center frequency reads the same as the transmit frequency in step A-7 above.

3.

Key

the transmitter and adjust the reject notch adjustments on the duplexer receive

leg

cavities for minimum

signal on the display. Change the attenuator, as necessary, to keep the signal on the display.

4.

Loosen the cavity reject adjustment nut and slide it within its slot while watching the display. Tighten the adjust-

Be

ment nut.

bandpass knob a maximum

careful not to mistune the rejection adjustment. Fine-tune the rejection adjustment

+I -15

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This completes the duplexer receiver

leg

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by

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4-40

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REJECT NOTCH ON RECEIVE LEG

4-41

CAVITY & DUPLEXER TUNING

BANDPASS

WITH

REJECT NOTCH

C. Adjustment

1.

Connect the Analyzer's RF duplexer transmitter port that comes from the transmitter. Move the Analyzer's RF

of

Reject Notch on Transmit Leg

In/Out

to the in-service duplexer as shown in figure 4-23. Disconnect the cable at the

In/Out

cable from the duplexer receiver port to the duplexer transmission port. Reconnect the cable coming from the receiver to the duplexer receiver port. Disable the receiver PL.

2.

Set DISPLAY to

3. Set the attenuator to

Gen/Mon

-30

dB and the Variable control to mid-range, to allow adequate signal to get through the

Mtr, FUNCTION switch to Generate FM, and enter the receiver frequency.

duplexer and quiet the receiver. Reduce the signal generator output, as necessary, to keep the receiver limiter

meter below saturation.

4. Adjust the reject notch adjustments on the duplexer transmit limiter meter. Change the signal generator output, as necessary, to keep the received signal up

leg

cavities for minimum signal level on the receiver

out

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below saturation.

5.

Loosen the cavity reject adjustment nut and slide it within its slot while watching the meter. Tighten the adjust-

Be

ment nut. bandpass knob a maximum

6.

Remove the test equipment and connect the duplexer back to the repeater. Check the duplexer for insertion loss

careful not to mistune the rejection adjustment. Fine-tune the reject notch adjustment by turning the

of

+I

-15

o.

according to its specifications.

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4-42

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FIGURE 4-23. DUPLEXER ADJUSTMENT SETUP;

REJECT NOTCH ON TRANSMIT LEG

4-43

DESENSITIZATION

IN-SERVICE

DUPLEXER

TEST

Perform this test after retuning a duplexer

following conditions may make a duplexer appear mistuned:

• High VSWR antenna

• IM between the repeater's transmitter and an external signal or

• Faulty cables

• Improper cable length

Normally, repairing or replacing cables solves the problem without retuning. Check the duplexer manufacturer's data sheets to determine proper installation.

1.

Connect the Analyzer to the repeater / duplexer under test, duplexer's antenna port through an RF tap-off isolating device.

To

prevent RF overload into the generate, provide sufficient isolation between the tap-off and the straight-through

feed. For example a

2. Connect the DVM input to the receiver speaker connection. Disconnect the cable from the RF transmitter from keying up on repeat.

3. Set DISPLAY to Gen/ Mon Mtr, FUNCTION to Generate FM, and enter the receiver frequency.

4.

Set the attenuator to -60 dB and the Variable control to mid-range.

connectors

or

configuration

1000

W transmitter requires

or

after detecting inadequate isolation between transmitter and receiver. The

as

CAUTION

50

dB isolation.

shown in figure 4-24. Connect the RF

In/Out

to prevent the

to the

~

5.

Adjust the 1 KHz Level control for 3.0 KHz DEY on the screen.

6.

Reconnect the cable from RF In/ Out to the RF tap-off and enable the transmitter to key-up. For example, it may be

necessary to provide 0.75 KHz PL /

7.

With this generated signal introduced to the RF tap-off, adjust the signal generator level Step attenuator and the

12

Variable control to the

8.

Disable the transmitter from key-up. Readjust the signal generator to obtain RF LEVEL.

9.

The difference between the RF LEVEL for (step 7),

10.

More than 2 dB desensitization may indicate:

Check them all, before attempting to retune the duplexer.

is

the amount

• defective antenna system

• loose shields

• transmitter spurs

• improper

or

dB SINAD level

of

system desensitization.

defective duplexer cable.

DPL

deviation for a

12

PL/DPL

as

indicated on the display. Note the generator RF LEVEL.

dB SINAD with the transmitter

accessed repeater.

12

dB SINAD again. Note the generator

off

(step

8)

and with the transmitter on

.

.--.....

4-44

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DESENSITIZATION TEST

IN-SERVICE DUPLEXER

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FIGURE 4-24. DESENSITIZATION TEST SETUP

4-45

FERRITE ISOLATOR TEST

1.

Use the Analyzer to test isolators for insertion loss and isolation. Connect the Analyzer shown in figure 4-25.

2.

Set DISPLAY to Duplex Gen and FUNCTION switch

ofO

MHz.

3. Use an RF adapter (bullet) to temporarily connect together the cables Set DISPLAY

to

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Mtr and attenuator

to

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to

the isolator.

0 dB.

to

the isolator under test, as

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and

an

r--....

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4. Note the RF LEVEL input value in dB, and

isolation values.

5. Reconnect the cables to the isolator; Duplex Gen to isolator input and RF

6. Note the RF LEVEL input value in dB, on the display. Subtract this value from the value found in step 4, to obtain the insertion loss in dB.

7. Reverse the connections to the isolator and again note the RF LEVEL input value in dB. Subtract this value from the value found in step 4, to obtain the isolation value in dB for the isolator under test.

8. Test dual isolators (connected in series) by the same procedure.

on

the display. Use this value as the reference level to determine insertion loss

In/Out

to isolator output.

,---..

,

4-46

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FERRITE ISOLA TOR TEST

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4-47

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MOTOROLA, INC. COMMUNICATIONS SECTOR TEST EQUIPMENT SERVICE DEPOT

1308 PLUM GROVE ROAD

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, SCHAUMBURG, ILUNOIS 60173

TEST EQUIPMENT SERVICE CENTER

2333 B. UTAH AVENUE EL SEGUNDO , CA

TEST EQUIPMENT SERVICE REQUEST FORM

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must

.

accompany

equipment

MOTOROLA, INC.

COMMUNICATIONS SECTOR

returned

CUSTOMER'S PURCHASE

MODEL NUMBER I

OF

DESCRIPTION

REQUESTED SERVICE:

PROBLEM:

ORDER

I

NO.

I

DATE

I

SERIAL NUMBER

I

SHIP

TO

ADDRESS:

I

SHIP VIA:

Providing

Equipment

MOTOROLA CUSTOMER NUMBER

,.

I

the

information

Service.

below

will

reduce

BILL TAG

the

turnaround

4-49

SHIP

TAG

time

on

your

Test

INTERNAL MOTOROLA ACCOUNT NO. 1

SIGNED:

------------

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Motorola R-2001D User manual

Specifications and Main Features

Frequently Asked Questions

User Manual