Motorola R-20018 User manual

TABLE OF CONTENTS
Paragraph
Page
FOREWORD ............................................................................... 1
SECTION 1
1-1 Introduction .............................................................................. 1-1
SECTION 2 - DESCRIPTION
i'
!
2-1
2-3 Description
............................................................................... 2-1
Microprocessor ........................................................................... 2-1
I 2-4
2-5
2-6
Display
.................................................................................. 2-1
System Warnings ......................................................................... 2-1
Functions ................................................................................ 2-1
2-7 AM, FM, CW, DSB Signal Generation ...................................................... 2-2
2-8 Simultaneous Modulation ................................................................. 2-2
2-9 Modulation Display ....................................................................... 2-2
2-10 Sweep Generation ........................................................................ 2-2
2-11
SINAD Metering .......................................................................... 2-2
2-12 Multi-Mode Code Synthesizer ............................................................. 2-2
2-13 Off-The-Air Monitor ...................................................................... 2-2
2-14
IF Display ................................................................................ 2-2
2-15 Spectrum Analyzer ....................................................................... 2-3
2-16 RF Burnout Protection .................................................................... 2-3
2-17 Terminated
RF Power Measurement ....................................................... 2-3
2-18 In-Line Power Measurement
............................................................... 2-3
2-19 Duplex Generator ........................................................................ 2-3
2-20 500-kHz Oscilloscope
..................................................................... 2-3
2-21 Frequency Counter ....................................................................... 2-4
2-22 AC/DC Voltmeter
......................................................................... 2-4
2-23 Power Supply
............................................................................ 2-4
SECTION 3- INSTALLATION
3-1 Packing Information ...................................................................... 3-1
3-4 Initial Setup .............................................................................. 3-1
3-5 Analyzer ................................................................................. 3-1
3-6 Battery Pack ............................................................................. 3-2
3-7 Blower Assembly
......................................................................... 3-2
SECTION 4- OPERATION
4-1 General .................................................................................. 4-1
4-3 Controls, Indicators, and Connectors ...................................................... 4-1
4-5 Operation ............................................................................... 4-12
4-7 Calibrate
................................................................................ 4-12

TABLE OF CONTENTS (CONT)
Paragraph Page
SECTION 4- OPERATION (CONT)
4-8 Generator Operation ..................................................................... 4-13
4-9 Duplex Generation ...................................................................... 4-14
4-10 Frequency Counter ...................................................................... 4-15
4-11 Spectrum Analyzer ...................................................................... 4-15
4-12 Monitor ................................................................................. 4-16
4-13 Ext Wattmeter ........................................................................... 4-17
4-14 Simultaneous Generate and Measurement Operations ..................................... 4-17
SECTION 5 - MAINTENANCE
5-1 Service ................................................................................... 5-1
5-6 Replacement Parts Ordering .............................................................. 5-1
5-9 Addresses ................................................................................ 5-1
5-10 General Offices ........................................................................... 5-1
5-11 U.S. Orders .............................................................................. 5-2
5-12 Canadian Motorola Electronics Company . .. .. . .. .. . .. . .. .. . .. .. .. . .. .. .. .. .. .. . .. . . .. .. . . 5-2
5-13 All Countries Except U.S. and Canada .................................................... 5-2
5-14 Major Assemblies ......................................................................... 5-4
5-16 Theory of Operation ...................................................................... 5-7
5-17 General .................................................................................. 5-7
5-20 System Control. .......................................................................... 5-7
5-25 Generate Mode ........................................................................... 5-7
5-34 Power Meter ............................................................................ 5-13
5-40 Monitor Mode ........................................................................... 5-14
5-52 Duplex Generator ....................................................................... 5-16
5-56 Code Synthesizer ...................................................................... ·· 5-17
5-65 Frequency Counter ...................................................................... 5-19
5-71 Digital Voltmeter (DVM) ................................................................. · 5-19
5-84 Oscilloscope ............................................................................ 5-21
5-96 Sinad Meter .......................................................................... · .. 5-23
5-99 Alignment Procedure .................................................................... 5-24
5-100 Introduction ............................................................................. 5-24
5-102 Test Equipment Required ................................................................ 5-24
5-104 Preparation for Alignment. ............................................................... 5-25
5-105 Basic Alignment Procedure .............................................................. 5-25
5-118 Extended Alignment Procedure ........................................................... 5-30
5-126 Checkout Procedure ..................................................................... 5-34
5-127 Introduction .......................................................................... ··· 5-34
5-129 Test Equipment Required ................................................................ 5-34
5-131 Procedure ............................................................................... 5-35
5-146 System Troubleshooting ................................................................. 5-39
SECTION 6 - SYSTEM INTERCONNECT AND PARTS LISTS
ii
!
@ MOTOROLA INC.
Communications
Group
© Motorola, Inc:. 1980
AU Righls Reserved
Printed in U.S.A.
R-20018/R-20028
COMMUNICATIONS SYSTEM
ANALYZER
1313 E. Algonquin Road, Schaumburg,ll. 60196 68P81069A93-0
6/30/SI·SK
j

LIST OF ILLUSTRATIONS
Figure Page TABLE OF CONTENTS
(CONT)
1-1 Communications System Analyzer .......................................................... 1-0 Paragraph Page
2-1 Accessories Supplied with Analyzer ......................................................... 2-4 SECTION 7- LOW VOLTAGE POWER SUPPLY (A1)
3-1 Typical Communication System Analyzer Packaging ......................................... 3-1
7-1 General .................................................................................. 7-1
4-1 Controls, Indicators, and Connectors, Front Panel ........................................... 4-2 7-2 Input Power Control
...................................................................... 7-1
4-2 Controls, Indicators, and Connectors, Left Side Panel ....................................... 4-3 7-6 DC Output Control
....................................................................... 7-1
4-3 Controls, Indicators. and Connectors, Rear Panel ............................................ 4-3
4-4 System Analyzer Time Base Calibrate Test Setup and CRT Display
.......................... 4-13
7-9 Protection
Circuitry ....................................................................... 7-1
7-13 High Voltage Supply Control ............................................................. 7-2
7-14 Switcher Module A1A1 ................................................................... 7-2
4-5 Duplex Generation Test Setup and CRT Display ............................................ 4-14 7-17 Output Module A1A2
...................................................................... 7-2
4-6 Spectrum Test Setup and CRT Display
..................................................... 4-16
4-7 Wattmeter Test Setup and CRT Display .................................................... 4-17
7-21 Control Module A1A3 .................................................................... 7-3
7-24 Relay Module A1A4
...................................................................... 7-4
4-8 Test Setup for FM Receiver Sensitivity Using Generator and SINAD SECTION 8 - SCOPE AMPLIFIER (A2)
Meter with CRT Display ................................................................... 4-18
8-1 General .................................................................................. 8-1
4-9 Test Setup for Pager and Alert Functions with CRT Display ................................. 4-19 8-2 Deflection Amplifiers
..................................................................... 8-1
4-10 Test Setup for Using DVM and Signal Generate with CRT Display ........................... 4-20 8-3 Horizontal Timebase Generator
........................................................... 8-1
5-1 Communication System Analyzer. Top View Cover Removed ................................. 5-6
5-2 Communication System Analyzer, Bottom View Cover Removed
.............................. 5-6
8-5 Horizontal Switching
...................................................................... 8-1
8-6 Intensity Control ......................................................................... 8-1
8-8 Focus Control ............................................................................ 8-1
5-3 Communication System Analyzer Block Diagram .......................................... 5-9 8-9 Astigmatism, Geometry, and Trace Rotation
............................................... 8-1
5-4 Generate Mode Block Diagram ............................................................ 5-12
5-5 Power Meter Block Diagram ............................................................... 5-14 SECTION 9 - SCOPE/DVM CONTROL MODULE (A3)
5-6 Monitor Mode Block Diagram ............................................................. 5-15
5-7 Duplex Generator Block Diagram .......................................................... 5-17
9-1 General .................................................................................. 9-1
9-4 Scope Vertical Control .................................................................... 9-1
9-7 SSB Detection ............................................................................ 9-1
5-B Code Synthesizer Block Diagram .......................................................... 5-18 9-8 455 kHz PLL
............................................................................. 9-2
5-9 Frequency Counter Block Diagram ........................................................ 5-19 9-9 Scope Horizontal Control
................................................................. 9-2
5-10 Digital Voltmeter (DVM) Block Diagram
.................................................... 5-20
5-11 Oscilloscope Block Diagram ............................................................... 5-22
9-11 Synthesizer Sweep Control. ............................................................... 9-2
9-12 Scope Z-Axis Control ..................................................................... 9-2
9-13 Modulation Display Control ............................................................... 9-2
5-12 Sinad Meter Block Diagram ............................................................... 5-24 9-17 Peak Detector
............................................................................ 9-3
5-13 Scope Amplifier Alignment Points ......................................................... 5-25
5-14 Front Panel Interface Alignment Points
.................................................... 5-28
5-15 Scope/DVM Control Alignment Points
..................................................... 5-29
9-18 DVM Control
............................................................................. 9-3
9-21 SINAD Detection ......................................................................... 9-4
9-22 Module Control.
.......................................................................... 9-4
5-16 Horizontal Time Base Alignment Points .................................................... 5-29 SECTION
10 -RECEIVER (A4)
5-17 DVM Input Buffer Alignment Points
........................................................ 5-30
10-1 General ................................................................................. 10-1
5-18 Scope/DVM Control Test Point Numbering ................................................. 5-30
5-19 Processor 1/0 A/D Alignment Points ....................................................... 5-31
5-20 Scope/DVM Control Char Sweep and Sinad Alignment Points ............................... 5-32
10-2 Down Converter ......................................................................... 1 0-1
10-4 Linear IF Amplifier and Detectors ......................................................... 10-1
10-8 Audio Switching and Filtering ............................................................ 10-1
10-10 Logarithmic Amplifier and Detector ....................................................... 10-2
10-11 Alarm Generator and Audio Amplifier ..................................................... 10-2
10-12 Module Control.
......................................................................... 10-2
vi
iii

r TABLE OF CONTENTS (CONT)
TABLE OF CONTENTS (CONT) Paragraph
Page
Paragraph
Page
SECTION 16- HIGH VOLTAGE POWER SUPPLY (A10)
SECTION
11 - RF SYNTHESIZER (AS)
16-1 General ................................................................................. 16-1
16-2 High Voltage Supply ..................................................................... 16-1
11-1 General ................................................................................. 11-1
11-2 Frequency Synthesis Scheme ............................................................ 11-1
SECTION 17- RF INPUT MODULE (A11)
11-5 310-440 MHz Phase Locked Loop ........................................................ 11-1
11-6 60.5 MHz Phase Locked Loop ............................................................ 11-1
11-7 550 MHz Phase Locked Loop ............................................................. 11-1
11-9 500-1000 MHz Phase Locked Loop ....................................................... 11-2
11-10 Modulation Control ...................................................................... 11-2
17-1 General ................................................................................. 17-1
17-2 Input Protection and Power Meter ........................................................ 17-1
17-4 Wideband Amplifier and Frequency Converter ............................................. 17-1
17-9 Duplex Generator ....................................................................... 17-2
11-11 Module Control. ......................................................................... 11-2 SECTION
18- FRONT PANEL INTERFACE MODULE
SECTION 12 -AUDIO SYNTHESIZER (A6)
18-1 General ................................................................................. 18-1
12-1
General ................................................................................. 12-1
12-2 Private Line Generator ................................................................... 12-1
12-7 DPL Generator .......................................................................... 12-1
12-10 1 kHz Tone .............................................................................. 12-2
12-11 External Modulation ..................................................................... 12-2
12-12 Modulation Control
...................................................................... 12-2
18-2 Input Coupling and Ranging
............................................................. 18-1
18-4 DVM Buffer ............................................................................. 18-1
18-5 Frequency Counter Preamp .............................................................. 18-1
18-6 Scope Vertical Preamp ................................................................... 18-1
18-7 Scope Horizontal Preamp ................................................................ 18-1
18-8 Control and Display Interlace ............................................................ 18-1
12-14 Module Control. ......................................................................... 12-2 SECTION
19- 10 MHz FREQUENCY STANDARD MODULE (A13)
SECTION 13- PROCESSOR 1/0 MODULE (A7)
19-1 General ................................................................................. 19-1
13-1 General ................................................................................. 13-1
13-2 10.245 MHz Phase Locked Loop .......................................................... 13-1
13-3 System Control Bus Interface ............................................................ 13-1
SECTION 20 -FRONT PANEL (A14)
20-1 General. ................................................................................ 20-1
I
t .
13-6 DVM .................................................................................... 13-1 20-2 Display Board ........................................................................... 20-1
13-8 Frequency Counter ...................................................................... 13-1
SECTION 21 -IEEE -488 BUS CONTROL
SECTION
14- IEEE INTERFACE MODULE (A8)
21-1
Introduction .......................................................................... 21-1
14-1 General ................................................................................. 14-1 21-7
IEEE-488 Bus Structure ............................................................... 21-3
14.2 IEEE Bus Interface ...................................................................... 14-1
21-9 Bus Signals .......................................................................... 21-3
14-3
RF Level Control ........................................................................ 14-1 21-10 Data Transfer
........................................................................ 21-3
14-5 Modulation Control
...................................................................... 14-1
21-12 Programming .......................................................................... 21-3
14-6 Address Decode and Control Latches
..................................................... 14-1 21-15 Command Structure
.................................................................. 21-4
SECTION 15 -PROCESSOR MODULE (A9) 21-24
' 21-25 Command Strings
.................................................................... 21-7
Command Types
..................................................................... 21-7
15-1 General ................................................................................. 15-1
15-2 Processor and Buffer .................................................................... 15-1
15-3 Program Memory (ROM) ................................................................ 15-1
15-4 Nonvolatile Memory (NVM) .............................................................. 15-1
15-5 Random Access Memory (RAM) ......................................................... 15-1
15-6 Peripheral Interface Adapter (PIA) ....................................................... 15-1
15-7 Timing Generator ................................ · ....................................... 15-1
15-8 Character Generator .................................................................... 15-1
' . 21-29
21-30
21-35
21-36
21-42
21-45
21-46
21-53
Trigger Command
.................................................................... 21-7
Return Data
.......................................................................... 21-7
Programming Commands
............................................................. 21-8
Terminal Mode
....................................................................... 21-8
Error Messages
....................................................................... 21-8
Service Requests ..................................................................... 21-10
Programming Considerations ......................................................... 21-11
General .............................................................................. 21-12
21-54 R2002A Analyzer Configuration
....................................................... 21-12
SECTION 22- BATTERY ASSEMBLY
iv
v

LIST OF TABLES
Table Page
1-1 Physical Characteristics .................................................................... 1-1
1-2 Electrical Characteristics ................................................................... 1-1
1-3 Input/Output Characteristics ............................................................... 1-5
2-1 Accessories Supplied with the Communication Systems Analyzer ............................ 2-5
2-2 Optional Equipment for Use with Analyzer
.................................................. 2-5
4-1 Controls, Indicators, and Connectors ....................................................... 4-1
5-1 List of Subassemblies ...................................................................... 5-4
5-2 Control Buses and Functions
.............................................................. 5-11
5-3 Basic Test Equipment Required ........................................................... 5-24
5-4 Extended Test Equipment Required
........................................................ 5-25
5-5 Test Equipment.
.......................................................................... 5-34
5-6 System Troubleshooting
.................................................................. 5-39
5-7 Test Point Identification
................................................................... 5-44
7-1 Control Logic Functions .................................................................. 7-3
9-1 Internal DVM Inputs ....................................................................... 9-3
21-1 IEEE-488 Interface Controllable Functions ........................... .
.. ................ 22-2
21-2 Command Categories
............................................... . .
................. 22-4
21-3 Programming Commands
........................................... .
.. ............... 22-5
21-4 Terminal Mode ASC II Characters Printable Characters
............... .
.. .............. 22-9
21-5 Error Messages
..................................................... .
.. ............... 22-10
21-6 SRQ Data .......................................................... .
.. ............... 22-10
21-7 Code Synthesizer Programming Considerations ...................... . .
................ 22-11
vii

FOREWORD
1. SCOPE OF MANUAL
This manual contains information for t11e installation. operation. and maintenance of the Communications
System Analyzer.
2. PURPOSE AND USE
The Motorola Communications System Analyzer is a portable test instrument. designed specifically for the
service and
monitoring of communications equipment. Its functions supersede those of a Service Monitor
expanding the features and capabilities to the point wherein servicing is achieved with a single instrument
rather than a host of separate equipment.
The R2001B is the standard Communications System Analyzer. The R2002B Analyzer. which contains the
IEEE-488 Standard interface control bus, is also available. Programming for the R2002B is covered in Seeton
21 of this manual.
The Analyzer improves a technician's
efficiency and accuracy and reduces servicing time
The Communications System Analyzer performs the functions of signal generation. signal monitonnq ;mfl
the tests normally associated with the devices listed below.
• Spectrum Analyzer
•
Duplex Generator
•
Modulation Oscilloscope
• Frequency
Counter
•
AC/DC Digital Voltmeter
•
RF Wattmeter
• General Purpose
Oscilloscope
•
Multi-Mode Code Synthesizer
•
SINAD Meter
• Sweep
Generator
The Analyzer meets the shock and vibration requirements of EIA test RS1528, the same specifications met
by Motorola mobile radios. This minimizes failures when the instrument is used in a mobile service van. and
means it is as
tough as the radios it services.
The
Communications System Analyzer is designed to be serviced quickly and easily, should a breakdown
occur.
The majority of the circuitry is on seven modular plug-in circuit boards which have built-in test points
that aid in isolating the problem to a specific board. Simple plug-in replacement gets the instrument back in
service.

CAUTION
This equipment contains parts that are subject to damage by
static electricity. Proper precautions should be taken during
handling.
2

ll52t-45
mama.;
mama
EIIIDI!I l
Figure 1·1. Communications System Analyzer
1-0
1
1
1
81!-\\82
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

SECTION 1
1-1. INTRODUCTION
1-2. This section lists the physical. electrical, and input/output characteristics of the Communications
System Analyzer shown in figure 1-1.
Table 1-1. Physical Characteristics
Characteristic Description
Length 20.75 inches (52.7 em)
Width 15.75 inches (40.0 em)
Height 8.25 inches (21.0 em)
Weight 48
pounds (21.9 kg) (Excluding Battery Pack)
Table 1-2. Electrical Characteristics
Characteristic Description
Frequency
Range
Resolution
Accuracy
Output (into 50 ohms)
Attenuator:
Range:
Accuracy:
Spectral
purity
Spurious:
Harmonics:
Frequency
modulation
Range:
Accuracy:
FM residual noise:
External/internal frequency
range:
External input:
Modes:
Signal Generator Mode
10 kHz to 999.9999 MHz
100Hz
Equal to master oscillator time base
16
dB variable plus 10 dB steps over 13 ranges
0.1/1 V to 1 Vrms (-127 dBm to +13 dBm)
±2 dB accuracy on 0 dB step attenuator range
±2 dB across other step attenuator ranges
±1 dB over temperature range
~-40 dB
~-15 dB
0 - 50 kHz peak
±5% of full scale
100Hz
5Hz- 10kHz (±1 dB)
Approximately 150 mV for 20 kHz deviation
Internal. external, microphone or all simultaneously

Table 1-2. Electrical Characteristics (Continued)
Characteristic I Description
Manual Frequency Scan
Step size Switch Selectable: 100 Hz, 1 kHz,
10 kHz. 100 kHz and
1 MHz
(+ or-)
Step rate 5 steps/sec.
Time Base
Standard TCXO Aging: ±1 x 10-" per year
Temp:± 1 x 10-s maximum error over the oo
to 55°C
temp. range
Optional ovenized high
Agir.;r ±1 x 1 o-' per year
stability Temp: ±5 x 10-
6 maximum
error over the oo to 55° C
temp range (warmup to
±5 x 1 o-' of final frequency
within 20 minutes)
Power and Environmental
-
AC
100-130 VAG, 200-260 VAG 47-63Hz
DC +11.5 VDC to +16 VDC
Optional battery 13.6V battery -provides 1 hour continuous operation
Temperature range
0' to 55°C operating; -40 to 85' C storage
-
Table 1-3. Input/Output Characteristics
Characteristic
Ext mod in
Mic.
Ext Horiz
Vert/Sinad/DVM/Counter In
Description
Input
10K ohms nominal, 150 mV typical for 20kHz dev. FM or
80%AM
Mic input provides bias and IDC limiting suitable for
Motorola RTM 9000A handseL PTTswitches R2001 from
monitor to generate.
1volt
minimum for full screen deflection. Maximum input
10 volts.
1 Meg ohm, 40 pf Nominal; ±300volts DC max, 300 Vrms
max at frequencies
below 500 Hz, 10 Vrms max up to
35 MHz
• Scope vert in: DC to 500 kHz or 5o Hz to 500kHz AC
mode (±3 dB)
• Sinad in: 0.5 to 10 Vrms in at 1 kHz
1-5
·--
Table 1-2. Electrical Characteristics (Continued)
Characteristic Description
l------------------------------1------------------- --------
Amplitude modulation
Range:
Accuracy:
External/internal frequency
range:
External input:
Modes:
Double sideband suppressed
carrier
0 to 80% from 1 to 500 MHz
± 10% of full scale from
0% to 50% AM
5Hz-10kHz (±1 dB)
Approximately 150 mV for 80%, BNC connector
Internal, external, microphone or all simultaneously
Carrier suppression:
?io 25 dB (1 MHz- 500 MHz)
~------~~----------~-------
Frequency
Range:
Resolution:
Accuracy:
Frequency
error indicator
Input sensitivity
Spurious response
Deviation Measurement
Range:
Accuracy:
Peak deviation
limit alarm:
AM
modulation measurement
Range:
Accuracy:
Monitor Mode
1 MHz to 999.9999
MHz
100Hz
Equal to that of master oscillator lime base
Autoranging CRT display. ± 10 Hz resolution for
frequency
error measurements on 1.5 kHz, 5kHz and 15
kHz full scale ranges. ±1 Hz resolution on the 50 Hz
full scale range.
1.5/1 V for 10 dB EIA Sinad (narrow band ±6 kHz
mod. acceptance) 7 Jl. V for 10 dB EIA Sinad (wide
band± 100 kHz mod. acceptance) 4 MHZ to 1000 MHz.
Useable to 1 MHz.
-40 dB typical
0 dB image at ±21.4 MHz
-10 dB at L.O. harmonics ±10.7 MHz
1, 10, 100 kHz full scale
±5%
of reading ±100Hz from 500Hz to 50 kHz deviation;
±10% of reading from 50 kHz to 75kHz deviation
Set via keyboard to 100Hz resolution (0 kHz to
99.9 kHz). Audible alarm indicates limit condition in all
Monitor Modes.
0 to 100%
±5% of full scale
1-2

Table 1-3. Input/Output Characteristics (Con!)
Characteristics
RF In/Out
Ext Wattmeter
10 MHz std in (rear panel)
Mod out
Demod out
RF in/out
Duplex gen out
10 MHz std out (rear panel)
Description
• DVM in: 1. 10, 100 and 300V full scale AC or DC. AC
bandwidth 50 Hz to 10kHz for ±5% F.S. accuracy (AC
dBm calibrated across 600 ohms)
• Frequency counter in: 30 mV or greater required from
10Hz to 1 MHz. 50 mV or greater required from 1MHz
to 35
MHz
50 ohms nominal, 125 watts max (1-1000 MHz)
CAUTION:
The RF In/Out Jack is protected against RF overload. However.
to prevent
undue stress on the protected circuits it is advisable
to always
switch the system to the power monitor mode before
applying
power in excess of 200 mW. Additional protection is
also obtained by making it a practice not to leave the step
attenuator in the 0 dB position.
Characteristics suitable for Motorola ST-1200 series
Wattmeter Elements
70 to 350 mV rms input required at 10 MHz,
impedance greater than
50 ohms.
Output
Up to 11 vpp into 600 ohms 10 Hz to 10 kHz
Typically 3 vpp into 600 ohms for ±5 kHz deviation
narrowband, 4
vpp for± 75 kHz deviation wideband.
DC to 10kHz response
1.0 Vrms (+13 dBm) to 0.1 Vrms (-127 dBm) 50 ohm
nominal source impedance. 10kHz to 1.0 GHz.
-30 dBm typical, 50 ohm nominal source impedance
2 MHZ to 1 GHz
250 mV rms nominal output into 50 ohms
1-6

Table 1-2. Electrical Characteristics (Continued) Table 1-2. Electrical Characteristics (Continued)
Characteristic Description Characteristic Description
Digital Voltmeter
RF Wattmeter
(Autoranging display) Readout
Auto ranging digital display, 1, 10, 100, 300 volts full
Frequency range: 1 MHz to 1000 MHz scale. AC-dBm calibrated across
600 ohms.
Power range: 1.0 watts to 125 wattts DC accuracy ±
1% of full scale± 1 least significant digit
Accuracy: ±
10%, 1 watt to 125 watts AC accuracy ±5%
of full scale
Protection Over temp indicator AC bandwidth 50 Hz to 10kHz
General Modulation Source
Spectrum Analyzer Code Synthesizer
Dynamic range
"?-75 dB displayed,- 105 dBm to +30 dBm input range Frequency range 5 Hz to g,9999 kHz sinewave
with step attenuator Resolution
0.1 Hz
Frequency Frequency accuracy ±0.01%
Range 4 MHZ to 1,000
MHZ
Distortion
~1%
Full scale frequency Adjustable between 1 MHz and 10 MHz Signaling sequences Four fixed
dtspersion:
1. Tone only
2. Tone with battery saver
Duplex Generator
3. Tone and voice
4. Group call
Frequency offset Adjustable from 0 to
10 MHz plus fixed offset of Four user programmable
45 MHz (high or low side) Tone remote access Remote base access sequence
as follows
Modulation level (FM
only) Adjustable from 0 to 20 kHz peak deviation Tone A
for 150 msec
Tone B for
40 msec 10 dB below Tone A
Oscilloscope Tone A continuously 30 dB below the first Tone A
burst
Size 8
em x 10 em Digital private line (DPL) Codes 000 to 777 and inverted
Frequency response DC to 0.5 MHz (3 dB point) Fixed 1 kHz
External vertical
input range 10 mV, 100 mV, 1V, 10V (per division) Accuracy Equal to master time base
Sweep rates 1 Jl s, 10 Jl s, 0.1 ms, 1 ms, 0.01S, 0.1S (per division) Distortion
::;:;1%
Sync Automatic
or normal triggering External Input
Microphone Standard RTM 4000A microphone interface with !DC.
Frequency Counter External Jack
Frequency range 5 Hz to
10 kHz
Frequency range Level 7 vrms maximum
10Hz to 35 MHz Impedance
10 Kohm nominal
Readout 5 digit, autoranging Code synthesizer external 0-3 vrms into a 600 ohm load
Input sensitivity 30 mV from 10 Hz to 1 MHz
output level
50 mV from 1 MHz to 35 MHz
SlNAD Meter
Input level range 0.5V to
10 Vrms
Sinad accuracy ±1 dB at
12 dB Sinad
1-3 1-4

2-7. AM, FM, CW, DSB Signal Generation. The built-in general purpose signal generator provides
continuous coverage of the HF, VHF, and UHF land mobile spectrum for receiver testing. Many forms of
external and internal modulation can be simultaneously impressed on the carriersignal
for actual composite
signals. The frequency range
of the RF signal generator is from 10kHz to 1000MHz in 100Hz steps. Tt1e output
of up to 1 Volt rms provides sufficient amplitude to get through misaligned tuners and receivers. and is
especially effective when changing a receiver's frequency. The high level, clean output is available over the
entire frequency range
of the Communications System Analyzer. The output frequency is referenced to an
internal time base which can be calibrated to the WWV Standard. (See paragraph 4-7.)
2-8. Simultaneous Modulation. Modulation is simultaneously available from an internal 1 kHz tone
generator, a
multi-mode code synthesizer, and from external inputs. The external modulation can be voice
from a standard
Motorola mobile radio microphone (which plugs into the front panel ofthe instrument). as well
as a signal applied to the external BNC input. Separate controls are provided for independently setting the
levels
of the 1 kHz tone, the code synthesizer, and the external modulation sources. The 1 kHz test tone is a
convenient source
of modulation for making SINAD measurements. A MOD OUT connector providesexternal
access to all
of the modulation signals.
2-9.
Modulation Display. The recovered audio waveform, or audio used to modulate the generator carrier,
can be viewed on the CRT. It is used to graphically measure deviation, and to aid in waveform analysis.
2-10. Sweep Generation. The sweep generator mode provides an RF output that is swept in frequency
across a band centered at the programmed frequency. A synchronized horizontal sweep
for the internal
oscilloscope allows filter characteristics to be easily determined. This is ideal for in-depth troubleshooting of
IF amplifiers and filters.
2-11. SINAD Metering. A comprehensive check of receiver performance can be made with a SINAD
measurement. The analog line segment and digital representation of SINAD appear automatically whenever
the
unit is in the normal generate mode. The only hookups required are from the Communications System
Analyzer to the RF input of thereceiver under test, and from the audio output ofthe receiver to theinstrument's
multipurpose input. The measurement, and appropriateservicing, can then be accomplished without the need
for a separate signal generator, SINAD meter or distortion analyzer.
2-12.
Multi-Mode Code Synthesizer. The Communications System Analyzer generates Private Line tones
(PL), Digital Private Line codes (DPL),
two-tone sequential paging codes and tone-remote base signaling
tones. All codes are available at the Mod
Out jack, as well as being used internally to modulate the RF signal
generator. This eliminates the necessity
of using separate generators and oscillators for general servicing,
setting transmitter deviation,
or for checking tone-remote-base control lines. Timing sequences are also
stored in the
Tone Memory to provide fast set-up and eliminate errors. Userprogrammable timing sequences
are also provided to
allow the storage of non-standard or future time sequences.
2-13. 011-lhe-Air
Monitor. The 1.5 11 V sensitivity of the Communications System Analyzer receiver allows
off-the-air monitoring and measurement of transmitter frequency error and deviation to 1000 MHz. A variable
squelch allows weak signals to be monitored, but can be set higher
to ensure the proper signal-to-noise ratio
for measurement accuracy. The off-the-air monitor function enables frequent parameter checks without
leaving the shop, thus spotting system degradation early and keeping service costs down. Bandwidth can be
set Wide for off-channel signal location or wide band FM; or Narrow for maximum sensitivity and selectivity.
2-14. IF Display. When the IF display mode is selected, the Communications System Analyzer's receiver
IF
envelope is shown on the CRT. This allows the technician to qualitatively and quantitatively assess the
amplitude modulation envelope
of a transmitter.
2-2
2-15. Spectrum Analyzer. In this mode of operation the CRT displays a window of the RF spectrum whose
bandwidth (from 1MHz
to 10 MHz) is determined by the DISPERSION/SWEEP control. The centerfrequency
of this window ranges from 4 MHz to 1,000 MHz. selectable by entering a specific center frequency with the
keyboard. This center frequency
is digitally displayed at the top of theCRT screen,eliminating the need for an
external signal generator. and
counter to provide markers. Once a signal is centered on the screen, positive
identification
is aided by switching the Analyzer lo MONITOR AM or FM and listening to the demodulated
output via the built-in audio amplifier and speaker. Thespectrum analyzer's center frequency can be scanned
up
or down at rates varying from 0.5 kHzpersecond to 5 MHzper second, usingthe RF scan control.Slowrates
are used
to precisely determineasubjectsignal's frequencywhilefaster rates are used for locating intermittent
transmissions
or viewing large areas of the spectrum in a short time. Uses of the Spectrum Analyzer
are:
lntermodulation interference identification, IF and RF signal tracing, transmitter harmonics
measurements, transmitter spurious checks, and receiver local oscillator radiation.
2-16.
RF Burnout Protection. At RF input levels above 200 mW, in any operating mode, the input
automatically switches to the internal125 watt RF load, thus protecting the attenuator and signal generator
against damage from a keyed transmitter. If
power above 200 mW is applied in any mode except the power
monitor mode an audiable alarm sounds and a visual warning on the CRT directs the operator to switch to the
power monitor mode.
CAUTION
To prevent undue stress on the protected circuits it is advisable to always switch the
system to the power
monitor mode before applying power in excess of 200 mW.
Additional protection is also obtained by making it a practice not to leave the step
attenuator in the 0
dB position.
2-17. Terminated
RF PowerMeasurement. RF poweris automaticallymeasured when the Communications
System Analyzer is in the Power-Monitor mode. The built-in RF load dissipates up to 50 watts for threeminutes
and
up to 125 watts lor one minute. If a high power transmitter should be keyed into the unit for a time long
enough to threaten overheating
of the power measuring circuitry, the audible alarm sounds and the CRT
display changes to read "RF
LOAD OVER-TEMP," thus warning the technician to un-key. This instrument
function is further enhanced by the simultaneous indication
of RF power output, carrier frequency error. and
modulation, all on the same CRT display.
2-18. In-Line Power Measurement. Use
of the Motorola ST-1200 series Wattmeter elements in conjunction
with the analyzer's external wattmeter display provides measurement of forward and reflected antenna power
on the CRT display. This capability eliminates the complex hook-ups and theadditional instruments normally
required for antenna measurements.
2-19. Duplex Generator. In this mode, the Communications System Analyzer simultaneously receives and
generates the signals
for duplex radio servicing, while generated and monitored frequencies are observed on
the CRT. In the 0-10 MHz range, the 'Freq. Set' control tunes the proper offset frequency for theVHF and UHF
bands. The
45 MHz mode providesasingleoffset for the 800 MHz range. Aswitch is also provided to select high
or low side offset. as required. The Duplex Generatorprovides enhanced capabilityto service equipmentsuch
as repeaters, car telephones and Emergency Medical Telemetry portables.
2-20. 500-kHz Oscilloscope. This general purpose scope is ideal for waveform analysis in two-way
communication servicing. Use
it for viewing modulation signals (either internally or externally generated),
detection of asymmetric modulation
or audio distortion, and general purpose signal tracing and
troubleshooting.
2-3

2-21. Frequency Counter. The frequency counter measures inputs in a range from 10Hz to 35 MHz. Its 5
digit auto-ranging output is displayed on the CRT and allows precise measurement and setting of offset
oscillators, 35kHz and 455kHz pager IF's, PL frequencies and other external input signals. This function will
also
operate simultaneously with the generate or monitor receiver modes of operation. Frequency
measurement of transmitted carriers and other signals higher than 35 MHz is easily accomplished with the
frequency error readout in the monitor modes.
2-22. AC/DC Voltmeter. Switching to the DVM mode provides a digital-analog voltage presentation on the
CRT, along with the corresponding dBm value. The auto-ranging display provides full scale deflections of 1.
1 o. 100 and 300 Volts. AC or DC measurement is selected on the CRT. The meter's wide dynamic range and
three digit display are ideal for setting power supply voltages. checking bias levels, and setting audio levels.
Like the Frequency Counter, the DVM will operate simultaneously with generate or monitor operation.
2-23. Power Supply. The Communications System Analyzer may be powered by a variety of sources:
•
•
•
AC at 110 or 220 Volts, 50/60 Hz
DC from an external 12 Volt source such as a service vehicle
DC from an optional battery pack. Servicing can t11us be accomplished wherever the equipment under
test is located
2-24. ACCESSORIES.
2-25. Table
2-1 lists theaccessories supplied with the Communication System Analyzer. Optional equipment
available for use with the unit is listed in Table 2-2.
ACCESSORY KIT
··:;: .
PERfORMANCE RENlRT
'
Figure 2-1. Accessories Supplied with Analyzer
2-4
2-1. DESCRIPTION
SECTION 2
DESCRIPTION
2-2. The Communication System Analyzer is a portable test instrument designed for servicing and
monitoring of portable, mobile, and land base communications equipment operating over the frequency range
of 1 MHz to 1 GHz. The unit performs the functions of signal generation. frequency error and modulation
measurement. It is also capable of a variety of tests normally associated with the following devices:
Spectrum analyzer
Duplex offset generator
Modulation oscilloscope
Frequency counter
AC/DC digital-analog voltmeter
RF wattmeter
General purpose oscilloscope
Multi-mode code synthesizer
SINAD meter
Sweep generator
2-3. MICROPROCESSOR. A Motorola M-6800 series microprocessor permits keyboard entry of data,
autoranging of displays, fast frequency access. and permanent storage of often-used frequencies and codes.
Generate and
monitor RF frequencies, tone codes. and timing sequences can be programmed into a
nonvolatile memory, saving time and eliminating entry errors. When one particular type of equipment is
continuously serviced. the unit can be programmed to select the mode of operation required when first turned
on.
2.4 DISPLAY. All functions, generated or monitored, are presented on an 8 em x 10 em cathode ray tube
(CRT) in both analog and digital format, with the name of the function being displayed. The CRT also displays
control settings eliminating the need for operator search of different equipment panels. Digital readouts are
visually aided by the use of the continuously autoranging analog line segments, wl1ich are similar to a ba1
graph. Each has a base line and calibration markers, in addition to the intensified segment showing the
measurement.
The user selectable displays are listed in a column beneath the DISPLAY heading on the front
panel. Choosing a display is accomplished by pressing an arrow button below the column, for up or down
movement, as required. When the appropriate arrow is pressed. the LED adjacent to the selected display
illuminates.
FUNCTION is selected in the same way, providing rapid, accurate changes in service capability at
the touch of a button.
2-5. SYSTEM WARNINGS. To aid the technician in servicing, visual warnings will appearon the CRT when
certain overload or caution conditions exist. Displayswarn of low battery power, overheating of the RF load, or
an improper attenuator setting for particular measurements. In addition, a continuous audible alarm sounds
when a preset deviation
limit is exceeded in monitor modes. This limit is entered by using the keyboarcl and
may be
programmed from 0 kHz to 99.9 kHz, with 100 Hz resolution.
2-6. FUNCTIONS. The following paragraphs briefly describe the major functions of the Communications
System Analyzer.
2-1

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Table 2-1. Accessories Supplied with the Communication Systems Analyzer
Equipment Motorola Part No. Use
Front cover 15-80335A70 Front panel and CRT protection, storage of cables,
power cord, and other equipment for on-site
servicing.
Sun shade 15-80335A55 Snap over CRT during use in bright sunlight.
Power
cord 30-80336A36 Three conductor cord to supply AC power to unit.
Also used when charging optional battery pack.
Oscilloscope probe RTL-4058A A
X1 probe with attachments for general servicing.
In-line wattmeter adapter RTL-4055A Allows use of Motorola ST-1200 series in-line watt-
meter elements for direct measurement and display
of forward and reflected transmitted power.
Coax adapter 58-84300A98 Adapts front panel
"N" connector to BNC female
Antenna TEKA-24A Plugs
into RF in/out connector on front panel with
N to BNC adapter. Used
for off-the-air transmitter
and receiver tests.
Test microphone RTM-4000A Used for voice modulation of signals.
Connector kit RPX-4097A Consists of
connector shell, clamp, and four
connector pins. Used to fabricate a mating plug for
male de power
connector at back of analyzer.
Enables user to make a de power cable
to inter-
connect separate power source
to analyzer. Pins 1
and 2 are positive, pin 3
is the charging line, pin 4 is
ground.
Table 2-2. Optional Equipment for Use with Analyzer
Equipment
Motorola Part No. Use
IEEE-488 Standard Consult factory Enables fully automatic testing
with the unit
im ~rface bus option for retrofit
by external control from a computer or
information. programmable controller.
2-5

Table 2-2. Optional Equipment for Use with Analyzer (Con!)
Equipment
Battery pack
High-stability oscillator
module
Protective cover
Motorola Part No.
RTP-1002A
RTL-1007A
RTL-4056A
Use I
13.6 volt battery and charger attaches to back
of the unit. Provides one hour of continuousoperation. I
Cannot be used with IEEE-488 or Blower options.
Improves stability of the time base as specified in
electrical characteristics section.
Padded fabric type cover to protect unit from
excessive field wear.
2-6

3-1. PACKING INFORMATION
SECTION 3
INSTALLATION
3-2_- The unit ispackaged inafiberboard carton and protected by foam pieces as shown in figure3-1. The unit
IS first packed in a cardboard containerand then this carton is packed in asecond, largercardboardcontainer,
for further protection. Save the packing container and materials for future use.
Figure 3-1.
Typical Communication System Analyzer Packaging
3-3. All accessories supplied with the analyzer are packed in the analyzer cover.
3-4. INITIAL SETUP
3-5. ANALYZER.
To set up the Analyzer for use, place the unit on workbench or in mobile repair unit
Remove the front cover by operating the two latcheson thebottom of thecover. Lift thecoverand slide it to the
side to separate the hinges. Remove the power cord (AC
or DC) that is stored in the cover. Attach the female
connector of the power cord to the appropriate connector on the rear panel of the analyzer, and the other end
to the
power source. For AC power a grounded 3 wire power source of 100-130 Vac or 200-260Vac, 47-63Hz
must be used.
3-1

NOTE
The unit is set for 110-130 Vac operation from the factory. For operation from 100-
110 Vac
or 200-260 Vac, the voltage selection card must be readjusted before
connection
to the power source. This is accomplished by the following procedure:
1. Remove the power cord from the rear panel connector.
2. Slide the selector card cover door over the connector area exposingthe selection card and
fuse area.
3. Pull outward on the fuse ejector tab and remove fuse.
4. Remove the printed circuit board voltage selector card by pulling straight to the rear.
5. Reinsert the card at the orientation which causes the appropriate voltage range (marked
on card) to
be displayed.
6. Reinstall the fuse.
7. Slide the cover plate back to the original position, connect power cord, and proceed with
system operation.
Remove the accessories to be used from the cover. Move the POWER switch to the ON position. When the
Oven Ready indicator illuminates the unit's frequency standard is stabilized and the unit is ready for use,
(instantaneous with standard TCXO).
CAUTION
When installing the analyzer in avehicle, theDC supply lineshould be fused close to
the vehicle battery. The analyzer is protected against overload bythe DC SA fuse on
the rear
of the unit, but the vehicle is not protected.
3-6. BATTERY PACK.
The battery pack isattached to the rear of theanalyzerwith twoclips and two screws.
Align and slide the mounting clips of the batterypack into theslots on the mounting bracketson the leftside of
the back panel of the analyzer. Align the captive screws with the mounting holes on the right of the panel and
lighten. Connect the power
plug to the connector at the top right of the rear panel.
3-2

Item
RF Scan (Hz/Sec)
switch
POWER switch
Batt
indicator
AC indicator
Oven Ready indicator
DISPLAY indicators
Table 4-1. Controls, Indicators, and Connectors (Coni)
Description
Eleven
position switch
Three-position toggle
switch.
LED (red) I
LED (red)
LED (red)
Twelve LEOs (red)
Function
Allows automatic scan of the generated or the
monitored frequency. The switch setting indicates
rate
of frequency change. The rate is 5 steps per
second, with frequency steps of 100 Hz,
1 kHz,
10kHz, 100kHz and 1 MHz.
a.
Energizes all circuitry in the On position.
b. At Standby position, removes DC from all
circuitry except the frequency standard and
battery charger.
c.
At Off, only the battery charging circuitry is
operative if
an ac power source is being
used.
Illuminates when equipment is using DC power.
Illuminates when equipment is connected to an ac
power source. Position of POWER switch has no
effect on indicator. 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.
Illuminate one at a time to indicate the function or
type of operation the equipment is performing
and the information displayed on the CRT.
a.
b.
c.
4-4
Gen/Mon Mtr- In the generate mode the
center frequency,
output power, and modula-
lion depth of the RF output is displayed. In
the monitor mode the center frequency,
input power, frequency error, and modula-
lion depth of the received carrier is
displayed.
Modulation -The modulation audio in the
generate mode
or the demodulated audio in
the
monitor mode is displayed.
Spect Analyzer -The spectrum analyzer
mode is enabled. The RF spectrum and the
operating center frequency
is displayed.
l
I
4-1. GENERAL
SECTION 4
OPERATION
4-2. This section contains information for the operation of the Communication System Analyzer.
4-3. CONTROLS, INDICATORS, AND CONNECTORS
4-4. The analyzer controls, indicators, and connectors are shown in Figures 4-1 through 4-3 and listed with
their functions in Table 4-1.
Table 4-1. Controls, Indicators, and Connectors
c--------..--------..------_, ______________ , .. ____ _
Item Description Function
1--------...L _________ J._ ___________________ _
Keyboard
<l
0 through 9
• Intensity
• Focus
Dispr/Sweep
control
FRONT PANEL (fig. 4-1)
Twelve-key
pushbutton
keyboard
Line
cursor key
Horizontal
cursor key
Numerical keys
Stacked concentric
potentiometers
• Intensity -center
(small)
knob
• Focus -outside
(large)
knob
Potentiometer
4-1
Enters variables into memory/enters manual
variables/selects variables to be used from the
memory.
Moves the cursor
down to the next line that may
be changed. Preset permanent entries are skipped.
Cursor will move down only. When on last line,
will return to top line with next entry.
Moves the horizontal
cursor left to the next entry
position that may be changed. When in the last
left position, the
cursor will move to the far right
with the next entry.
Used
to select from the memory a stored value
to be used, or to enter directly a value to be used.
Controls the intensity of the scope presentation.
Controls the focus of the scope presentation.
Controls the frequency span (1-10 MHz) displayed
on the CRT when unit is used
as a spectrum
analyzer. Provides sweep width
control when
either sweep
function (SWP 0.01-1 MHz or SWP
1-10 MHz) is selected.

••••••
••••••
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Figure 4-2. Controls, Indicators, and Connectors, Left Side Panel
AC lOA
®·,----------,@
Figure 4-3. Controls, Indicators, and Connectors, Rear Panel
4215-18
4-3