®MOTOROLA
Table of contents
·
test
equipment
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R·2001AIR·2002A
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68P81 069A84·0
MOTOROLA
Communications
Group
INC.
R-2001A/R-2002A
COMMUNICATIONS SYSTEM
ANALYZER
© Motorola, Inc. 1980
All Rights Reserved
Printed in U.S.A. 1313 E. Algonquin Road, Schaumburg, II. 60196
68P81069A84-0
5/30/80-SK
TABLE OF CONTENTS
i
Paragraph Page
FOREWORD
1-1 Introduction ............................................................................. 1-1
2-1 Description .............................................................................. 2-1
2-3 Microprocessor .......................................................................... 2-1
2-4 Display
2-5 System Warnings
2-6 Functions
2-7 AM, FM, CW, DSB Signal Generation
2-8 Simultaneous Modulation
2-9 Modulation Display
2-10 Sweep Generation
2-11 SINAD Metering ..........................................................................
2-12 Multi-Mode Code Synthesizer
2-13 Off-The-Air Monitor
2-14 IF Display
2-15 Spectrum Analyzer
2-16
RF
Burnout Protection
2-17 Terminated
2-18
In-Line Power Measurement .....................................................................
2-19 Duplex Generator
2-20 500-kHz Oscilloscope ............................................................................2-3
2-21 Frequency Counter
2-22
AC/DC Voltmeter.........................................................................
2-23 Power Supply
2-24 Accessories
................................................................................
SECTION 2 — DESCRIPTION
..................................................................................
.........................................................................
................................................................................
.................................................................
.......................................................................
........................................................................
......................................................................
................................................................................
.......................................................................
....................................................................
RF
Power
Measurement
........................................................................
.......................................................................
............................................................................
..............................................................................
SECTION 1
......................................................
.............................................................
.......................................................
2-1
2-1
2-1
2-2
2-2
2-2
2-2
2-2
2-2
2-2
2-2
2-3
2-3
2-3
2-3
2-3
2-4
2-4
2-4
2-4
SECTION 3 — INSTALLATION
3-1
Packing Information
3-4
Initial
Setup
3-5
Analyzer
3-6
Battery
3-7 Blower Assembly
4-1 General ................................................................................. 4-1
4-3 Controls, Indicators, and Connectors
4-5 Operation
4-7 Calibrate
.................................................................................
Pack
................................................................................
...................................................................................
......................................................................
..............................................................................
.............................................................................
.........................................................................
SECTION 4 — OPERATION
......................................................
3-1
3-1
3-1
3-2
3-2
4-1
4-12
4-12
TABLE OF CONTENTS (CONT)
ii
Paragraph Page
SECTION 4 — OPERATION (CONT)
4-8 Generator Operation ..............................................................................4-13
4-9 Duplex Generation
4-10 Frequency Counter
4-11
Spectrum Analyzer
4-12
4-13
Monitor
Ext
..................................................................................
Wattmeter
...........................................................................
4-14 Simultaneous Generate and Measurement Operations
5-1 Service .................................................................................................5-1
5-6 Replacement
Parts
5-9 Addresses .................................................................................................5-1
5-10 General Offices ......................................................................................5-1
5-11 U. S. Orders .
5-12 Canadian Motorola Electronics Company
5-13 All Countries Except U.
5-14 Major Assemblies .............................................................................5-4
5-16 Theory of Operation
5-17 General
..................................................................................
5-20 System Control ...............................................................................5-5
5-25 Generate
5-34 Power Meter
5-40 Monitor Mode
Mode ..........................................................................
...............................................................................
............................................................................
5-52 Duplex Generator
5-56 Code Synthesizer ..............................................................................5-15
5-65 Frequency Counter
5-71 Digital Voltmeter (DVM) .........................................................................5-17
5-84 Oscilloscope
5-96 Sinad Meter
5-99
Alignment
5-100
Introduction ............................................................................
............................................................................
.............................................................................
Procedure
5-102 Test Equipment Required
5-104 Preparation for
Alignment ...............................................................
5-105 Basic Alignment Procedure
5-118 Extended Alignment
5-126 Checkout
5-127
Introduction ............................................................................
Procedure ....................................................................
5-129 Test Equipment Required
5-131
Procedure ..............................................................................
5-146 System
Troubleshooting
..........................................................................
...........................................................................
.......................................................................
4-14
4-15
4-15
4-16
4-17
.....................................
4-17
SECTION 5 — MAINTENANCE
Ordering
........................................................................
5-1
............................................................................. 5-2
.......................................................
S.
and Canada
....................................................
......................................................................
5-2
5-2
5-5
5-5
5-5
5-11
...5-12
........................................................................
........................................................................
5-14
5-17
5-19
5-21
....................................................................
5-22
5-22
................................................................
5-22
5-23
..............................................................
Procedure ..........................................................
5-23
5-27
5-32
5-32
................................................................
5-32
5-33
.................................................................
5-37
SECTION 6 — SYSTEM INTERCONNECT AND PARTS LISTS
TABLE OF CONTENTS (CONT)
Paragraph Page
SECTION 7 - LOW VOLTAGE POWER SUPPLY (A1)
7-1 General
7-2 Input Power
7-6 DC Output Control
7-9 Protection Circuitry ......................................................................... 7-1
7-13 High Voltage Supply Control
8-1
General
8-2 Deflection Amplifiers
8-3 Horizontal Timebase Generator
8-5 Horizontal Switching ..................................................................... 8-1
8-6
Intensity
8-8 Focus Control
8-9 Astigmatism, Geometry, and Trace Rotation
9-1 General
9-4 Scope Vertical
9-7 SSB Detection .......................................................................... 9-1
9-8
455
9-9
Scope Horizontal
9-11 Synthesizer Sweep
9-12 Scope Z-Axis
9-13
Modulation Display
9-17
Peak
9-18 DVM
9-21 SINAD Detection
9-22 Module
..................................................................................
Control
..................................................................................
Control
............................................................................
.................................................................................
kHz PLL
Detector
Control
............................................................................
Control ...................................................................
............................................................................
.............................................................................
Control ..........................................................................
......................................................................
........................................................................7-1
..............................................................
SECTION 8 — SCOPE AMPLIFIER (A2)
.....................................................................
...........................................................
......................................................................
...............................................
SECTION 9 - SCOPE/DVM CONTROL MODULE (A3)
Control ..................................................................
Control
....................................:....................................
.................................................................
Control ..............................................................
Control
..............................................................
7-1
7-1
7-2
8-1
8-1
8-1
8-1
8-1
8-1
9-1
9-1
9-2
9-2
9-2
9-2
9-2
9-3
9-3
9-4
9-4
SECTION 10 — RECEIVER (A4)
10-1 General
10-2 Down Converter ........................................................................... 10-1
10-4 Linear IF Amplifier and Detectors ............................................................. 10-1
10-8
Audio Switching and Filtering
10-10 Logarithmic Amplifier and
10-11 Alarm Generator and
10-12 Module
11-1
General
11-2
Frequency Synthesis Scheme
................................................................................
..........................................................
Detector ......................................................
Audio
Control .........................................................................
.................................................................................
Amplifier .....................................................
SECTION 11 — RF SYNTHESIZER (A5)
...........................................................
iii
10-1
10-1
10-2
10-2
10-2
11-1
11-1
TABLE OF CONTENTS (CONT)
Paragraph Page
SECTION 11 - RF SYNTHESIZER (A5) (CONT)
11-5 310-440 MHz Phase Locked Loop ........................................................ 11-1
11-6
60.5
MHz Phase Locked Loop
11-7
550
MHz Phase Locked
11-9
500-1000 MHz Phase Locked Loop
11-10
Modulation
Control
......................................................................
11-11 Module Control ........................................................................ 11-2
SECTION 12 - AUDIO SYNTHESIZER (A6)
............................................................
Loop ............................................................
.......................................................
11-1
11-1
11-2
11-2
12-1 General
................................................................................
12-1
12-2 Private Line Generator ................................................................... 12-1
12-7 DPL Generator
12-10 1 kHz
12-11
Tone ............................................................................
External
Modulation
..........................................................................
....................................................................
12-1
12-2
12-2
12-12 Modulation Control ..................................................................... 12-2
12-14 Module Control .............................................................................12-2
SECTION 13 — PROCESSOR I/O MODULE (A7)
13-1 General
13-2
10.245
13-3 System Control Bus Interface
13-6 DVM
..................................................................................
MHz Phase Locked
Loop..........................................................
............................................................
.....................................................................................
13-1
13-1
13-1
13-1
13-8 Frequency Counter ........................................................................ 13-1
SECTION 14 - IEEE INTERFACE MODULE (A8)
14-1 General
14.2
IEEE
14-3
RF
14-5
Modulation
..................................................................................
Bus Interface
Level
Control
Control
......................................................................
.......................................................................
......................................................................
14-1
14-1
14-1
14-1
14-6 Address Decode and Control Latches .................................................... 14-1
SECTION 15 - PROCESSOR MODULE (A9)
15-1 General
..................................................................................
15-1
15-2 Processor.............................................................................. 15-1
15-6 Character Generator....................................................................... 15-1
SECTION 16 — HIGH VOLTAGE POWER SUPPLY (A10)
16-1 General
.................................................................................
16-1
16-2 High Voltage Supply ..................................................................... 16-1
IV
TABLE OF CONTENTS (CONT)
v
Paragraph Page
SECTION 17 — RF INPUT MODULE (AH)
17-1 General ................................................................................. 17-1
17-2 Input Protection and Power
17-4 Wideband Amplifier and Frequency
17-9 Duplex Generator
.......................................................................
SECTION 18 - FRONT PANEL INTERFACE MODULE
Meter .......................................................
Converter ............................................
17-1
17-1
17-2
18-1 General
18-2 Input
18-4 DVM Buffer
18-5 Frequency Counter Preamp
18-6 Scope Vertical
18-7 Scope Horizontal Preamp
18-8
Control
.................................................................................
Coupling
and Ranging
.............................................................
.............................................................................
..............................................................
Preamp ..................................................................
................................................................
and Display Interface
............................................................
SECTION 19 - 10 MHz FREQUENCY STANDARD MODULE (A13)
19-1 General
.................................................................................
SECTION 20 — FRONT PANEL (A14)
SECTION 21 — BLOWER ASSEMBLY
SECTION 22 — IEEE - 488 BUS CONTROL
22-1 Introduction .......................................................................... 22-1
22-7 IEEE-488 Bus Structure
22-9 Bus Signals
22-10 Data Transfer
...........................................................................
.........................................................................
................................................................
22-12 Programming ......................................................................... 22-3
22-15 Command Structure
22-24 Command Strings
22-25 Command Types
22-29 Trigger Command
22-30 Return Data
..........................................................................
22-35 Programming Commands
22-36 Terminal Mode
22-42 Error
Messages .....................................................................
22-45 Service Requests
22-46 Programming Considerations
22-53 General
22-54
R2002A
..............................................................................
Analyzer Configuration
...................................................................
....................................................................
.....................................................................
....................................................................
.............................................................
.......................................................................
.....................................................................
.........................................................
.......................................................
22-10
22-10
22-10
22-11
18-1
18-1
18-1
18-1
18-1
18-1
18-1
19-1
22-3
22-3
22-3
22-4
22-10
22-11
22-11
22-14
22-15
22-16
22-16
SECTION 23 — BATTERY ASSEMBLY
LIST OF ILLUSTRATIONS
Figure Page
1-1 Communications System Analyzer ............................................................ 1-0
2-1 Accessories Supplied with
Analyzer ........................................................
2-4
3-1 Typical Communication System Analyzer Packaging ........................................ 3-1
4-1 Controls, Indicators, and Connectors, Front Panel .......................................... 4-2
4-2 Controls, Indicators, and Connectors, Left Side
Panel
.......................................
4-3
4-3 Controls, Indicators, and Connectors, Rear Panel .......................................... 4-3
4-4 System Analyzer Time Base Calibrate Test Setup and CRT Display ......................... 4-13
4-5 Duplex Generation Test Setup and CRT Display .......................................... 4-14
4-6 Spectrum Test Setup and CRT Display .................................................... 4-16
4-7 Wattmeter Test Setup and CRT Display
....................................................
4-17
4-8 Test Setup for FM Receiver Sensitivity Using Generator and SINAD
Meter with CRT Display
4-9 Test Setup for Pager and Alert Functions with CRT Display
...................................................................
.................................
4-18
4-19
4-10 Test Setup for Using DVM and Signal Generate with CRT Display .......................... 4-20
5-1
Communication
System Analyzer, Top View Cover Removed
.................................
5-3
5-2 Communication System Analyzer, Bottom View Cover Removed ............................ 5-3
5-4 Generate Mode Block Diagram
5-5 Power Meter Block Diagram
............................................................
...............................................................
5-10
5-12
5-6
Monitor
5-7 Duplex Generator Block Diagram
5-8
Code Synthesizer Block Diagram
5-9
Frequency Counter Block Diagram
5-10
Digital
Mode Block Diagram
............................................................
..........................................................
.........................................................
.......................................................
Voltmeter (DVM) Block Diagram
....................................................
5-11 Oscilloscope Block Diagram ............................................................ 5-20
5-12 Sinad Meter Block Diagram
5-13 Scope Amplifier
Alignment
5-14 Front Panel Interface
5-15
Scope/DVM Control
5-16
Horizontal
5-17 DVM Input
5-18 Scope/DVM
5-19 Processor
—-5-20 Scope/DVM
Time
Buffer
Control
I/O
A/D
Control
Base
Alignment
Test Point
Alignment
Char Sweep
Alignment
Alignment
.............................................................
Points
Alignment Points
.........................................................
Points
Points
....................................................
.....................................................
....................................................
Points .......................................................
Numbering .................................................
Points
.......................................................
and
Sinad Alignment
Points ..............................
5-13
5-15
5-16
5-17
5-18
5-22
5-23
5-26
5-27
5-27
5-28
5-28
5-29
5-30
VI
LIST OF TABLES
Table . Page
1-1 Physical Characteristics ................................................................. 1-1
1-2 Electrical Characteristics
1-3
Input/Output
2-1 Accessories Supplied with the Communication Systems Analyzer
2-2 Optional Equipment for
4-1 Controls, Indicators, and Connectors
5-1 List of Subassemblies
5-2
Control
5-3 Basic Test Equipment Required
5-4 Extended Test Equipment Required ...................................................... 5-23
5-5 Test
5-6 System
5-7 Test Point
9-1
22-1 IEEE-488
22-2 Command Categories
22-3 Programming Commands
22-4 Terminal Mode ASC
22-5 Error Messages
22-6
22-7 Code Synthesizer Programming Considerations
Equipment ..........................................................................
Internal DVM Inputs
SRQ
Data
Characteristics
Buses and Functions
Troubleshooting
Identification
Interface
...................................................................
Controllable Functions
............................................................
...................................................................
...............................................................
............................
Use
with Analyzer
......................................................................
...............................................................
...........................................................
..................................................................
...................................................................
.......................................................................
.......................................................................
.................................................................
II
Characters Printable Characters
..................................................
.......................................................
...................................
................... ...............
..............................
...............
...............
...............
..............
1-1
1-5
2-5
2-5
4-1
5-4
5-9
5-22
5-32
5-37
5-42
9-3
22-2
22-4
22-5
22-12
22-14
22-14
22-15
vii
FOREWORD
1
1. SCOPE OF MANUAL
This manual contains information for the 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 R2001A is the standard Communications System Analyzer. The R2002A Analyzer, which contains the
IEEE-488 Standard interface control bus, is also available. Programming for the R2002A is covered in Secton
22 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 monitoring, and
the tests normally associated with the devices listed below.
• Spectrum Analyzer
• Duplex Generator
• Modulation Oscilloscope
• Frequency Counter
• AC/DC Digital
• RF Wattmeter
• General Purpose Oscilloscope
• Multi-Mode Code Synthesizer
• SINAD Meter
• Sweep Generator
Voltmeter
The Analyzer meets the shock and vibration requirements of EIA test RS152B, 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
8521-<15
aaaa
UDIUI
I!IDDEI
-2
so-11S2
Figure 1-1. Communications System Analyzer
1-0
1-1 INTRODUCTION
SECTION 1
1-2 This section lists the physical,
stem Analyzer shown in figure 1-1.
Table 1-1. Physical Characteristics
Characteristic
Length
Width
Height
Weight
Table 1-2. Electrical Characteristics
Characteristic Description
Frequency
Range
Resolution
Accuracy
Output (into 50 ohms)
Attenuator:
Range:
Accuracy:
electrical, and input/output characteristics of the Communications
Description
20.75 inches (52.7 cm)
15.75 inches (40.0 cm)
8.25 inches (21.0 cm)
48 pounds (21.9 kg) (Excluding Battery Pack)
Signal Generator Mode
10 kHz to 999.9999 MHz
100 Hz
Equal to master oscillator time base
16 dB variable plus 10 dB steps over 13 ranges
0.1 u 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
Spectral purity
Spurious:
Harmonics:
Frequency modulation
Range:
Accuracy:
FM residual noise:
External/internal frequency
range:
External input:
Modes:
<-40dB
<-15
dB
0 - 50 kHz peak
±5% of full scale
100 Hz
5 Hz - 10
Approximately 150 mV for 20 kHz deviation
Internal, external, microphone or all simultaneously
kHz (±1 dB)
1-1
Table 1-2. Electrical Characteristics (Continued)
Characteristic Description
Amplitude modulation
Range:
Accuracy:
External/internal frequency
range:
External input:
Modes:
Double sideband suppressed
carrier
Carrier suppression:
0 to 80% from 1 to 500 MHz
±10% of full scale from 0% to 50% AM
5
Hz - 10
kHz
Approximately 150 mV for 80%, BNC connector
Internal, external, microphone or all simultaneously
>
25
dB
(±1 dB)
(1
MHz - 500 MHz)
Monitor Mode
Frequency
Range:
Resolution:
Accuracy:
Frequency error indicator
Input sensitivity
1 MHz to 999.9999 MHz
100 Hz
Equal to that of master oscillator time base
Autoranging CRT display. ±10 Hz resolution for
frequency error measurements on 1.5 kHz, 5 kHz and 15
kHz full scale ranges. ±1 Hz resolution on the 50 Hz
full scale range.
1.5 ft V for 10 dB EIA Sinad (narrow band ±6 kHz
mod. acceptance) 7 fjtV for 10 dB EIA Sinad (wide
band ±100 kHz mod. acceptance) 4 MHz to 1000 MHz.
Useable to 1 MHz.
Spurious response
Deviation Measurement
Range:
Accuracy:
Peak deviation limit alarm:
AM modulation measurement
Range:
Accuracy:
-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 ±100 Hz from 500 Hz to 50 kHz deviation;
±10% of reading from 50 kHz to 75 kHz deviation
Set via keyboard to 100 Hz 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 1-2. Electrical Characteristics (Continued)
Characteristic
RF Wattmeter
(Autoranging display)
Frequency range:
Power range:
Accuracy:
Protection
Dynamic range
Frequency
Range
Full scale frequency
dispersion:
Frequency offset
Modulation leve l (FM only)
Size
Frequency response
External vertical input rang e
Sweep rates
Sync
Description
1
MHz
to
1000 MHz
1.0 watts to 125 wattts
±10%, 1 watt to 125 watts
Over temp indicator
General
Spectrum Analyzer
>75 dB displayed, - 105 dBm to +30 dBm input range
with step attenuator
4 MHz to 1,000MHz
Adjustable between 1 MHz and 10 MHz
Duplex Generator
Adjustable from 0 to 10 MHz plus fixed offset of
45 MHz (high or low side)
Adjustable from 0 to 20 kHz peak deviation
Oscilloscope
8 cm x
10
cm
DC to 0.5 MHz (3 dB point)
10 mV, 100 mV, 1V, 10V (per division)
1 [1 s, 10 H s, 0.1 ms, 1 ms, 0.01S, 0.18 (per division)
Automatic or normal triggering
Frequency range
Readout
Input sensitivity
Frequency Counter
10 Hz to
35
MHz
5 digit, autoranging
30 mV from 10 Hz to 1 MHz
50 mV from 1 MHz to 35 MHz
1-3
Table 1-2. Electrical Characteristics (Continued)
Characteristic
Readout
DC accuracy
AC accuracy
AC bandwidth
Code Synthesizer
Frequency range
Resolution
Frequency accuracy
Distortion
Signaling sequences
Tone remote access
Digital private line (DPL)
Fixed 1 kHz
Accuracy
Distortion
External input
Microphone
External Jack
Frequency range
Level
Impedance
Code synthesizer external
output level
Description
Digital Voltmeter
Auto ranging digital display, 1, 10, 100, 300 volts full
scale. AC-dBm calibrated across 600 ohms.
±1% of full scale ±1 least significant digit
±5% of full scale
50 Hz to
Modulation Source
10
kHz
5 Hz to 9.9999 kHz sinewave
0.1 Hz
±0.01%
<1%
Four fixed
1. Tone only
2. Tone with battery saver
3. Tone and voice
4. Group call
Four user programmable
Remote base access sequence as follows
Tone A for 150 msec
Tone B for 40 msec 10 dB below Tone A
Tone A continuously 30 dB below the first Tone A
burst
Codes 000 to 777 and inverted
Equal to master time base
<1%
Standard RTM 4000A microphone interface with IDC.
5 Hz to 10 kHz
7 vrms maximum
10 Kohm nominal
0-3 vrms into a 600 ohm load
Input level range
Sinad accuracy
SINAD Meter
0.5V to 10 Vrms
±1 dB at 12 dB Sinad
1-4
Table 1-2. Electrical Characteristics (Continued)
Characteristic
Step size
Step rate
Standard TCXO
Optional ovenized high
stability
AC
DC
Optional battery
Temperature range
Characteristic
Description
Manual Frequency Scan
Switch Selectable: 100 Hz, 1 kHz, 10 kHz, 100 kHz and
1
MHz
(+
or-)
5 steps/sec.
Time Base
Aging: ±1 x 10-° per year
Temp: ±1 x 10-6 maximum error over the 0° to 55° C
temp. range
Aging: ±1 x 10-6 per year
Temp: +5 x 10-8 maximum error over the 0° to 55°C
temp range (warmup to ±5 x 10~7 of final frequency
within 20 minutes)
Power and Environmental
100-130 VAC, 200-260 VAC 47-63 Hz
+11.5
VDC
to
+16
VDC
13.6V battery - provides 1 hour continuous operation
0° to 55°C operating; -40 to 85° C storage
Table 1-3. Input/Output Characteristics
Description
Input
Ext mod in
Mic.
Ext Horiz
Vert/Sinad/DVM/Counter In
10K ohms nominal, 150 mV typical for 20 kHz dev. FM or
80% AM
Mic input provides bias and IDC limiting suitable for
Motorola RTM 9000A handset. PTT switches R2001 from
monitor to generate.
1 volt minimum for full screen deflection. Maximum input
10 volts.
1 Meg ohm, 40 pf Nominal; ±300 volts 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 50 Hz to 500 kHz AC
mode (±3 d8)
• Sinad in: 0.5 to 10 Vrms in at 1 kHz
1-5
Table 1-3. Input/Output Characteristics (Cont)
Characteristics Description
• DVM in: 1, 10, 100 and 300V full scale AC or DC. AC
bandwidth 50 Hz to 10 kHz for ±5% F.S. accuracy (AC
dBm calibrated across 600 ohms)
• Frequency counter in: 30 mV or greater required from
10 Hz to 1 MHz. 50 mV or greater required from 1 MHz
to
35
MHz
RF In/Out
50 ohms nominal, 125 watts max (1-1000 MHz)
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.
CAUTION:
Ext Wattmeter
10 MHz std in (rear panel)
Mod out
Demod out
RF in/out
Duplex gen out
10 MHz std out (rear panel)
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 10 kHz response
1.0 Vrms (+13 dBm) to 0.1 Vrms (-127 dBm) 50 ohm
nominal source impedance. 10 kHz 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
SECTION 2
DESCRIPTION
2-1. 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 cm x 10 cm 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, which are similar to a bar
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 appear on the CRT when
certain overload or caution conditions exist. Displays warn 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 keyboard 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
2-7. AM, FM, CW, DSB Signal Generation. The built-in general purpose signal generator provides
continuous coverage of the HF, VHP, and UHF land mobile spectrum for receiver testing. Many forms of
external and internal modulation can be simultaneously impressed on the carrier signal for actual composite
signals. The frequency range of the RF signal generator is from 10 kHz to 1000 MHz in 100 Hz steps. The 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 of the 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 Sl NAD measurements. A MOD OUT connector provides external
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 the receiver under test, and from the audio output of the receiver to the instrument's
multipurpose input. The measurement, and appropriate servicing, can then be accomplished withoutthe 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. User programmable timing sequences
are also provided to allow the storage of non-standard or future time sequences.
2-13. Off-the-Air Monitor. The 1.5 u V sensitivity of the Communications System Analyzer receiver allows
off-the-air monitoring and measurement of transmitter frequency error and deviation to 1000MHz. A variable
squelch allows weak signals to be monitored, but can beset 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 1 MHz to 10 MHz) is determined by the DISPERSION/SWEEP control. The center frequency
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 the CRT 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 to MONITOR AM or FM and listening to the demodulated
output via the built-in audio amplifier and speaker. The spectrum analyzer's center frequency can be scanned
up or down at rates vary ing from 0.5 kHz per second to 5 MHz per second, using the RF scan control. Slow rates
are used to precisely determine a subject signal's frequency while faster rates are used for locating intermittent
transmissions or viewing large areas of the spectrum in a short time. Uses of the Spectrum Analyzer
are: Intermodulation 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 internal 125 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 Power Measurement. RF power is automatically measured when the Communications
System Analyzer is in the Power-Monitor mode. The built-in RF load dissipates up to 50 watts for three minutes
and up to 125 watts for 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 ofRF 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 the additional 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 the VHF and UHF
bands. The 45 MHz mode provides a single offset for the 800 MHz range. A switch is also provided to select high
or low side offset, as required. The Duplex Generator provides enhanced capability to service equipment such
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 10 Hz to 35 MHz. Its 5
digit auto-ranging output is displayed on the CRT and allows precise measurement and setting of offset
oscillators, 35 kHz and 455 kHz 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,
10, 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 thus be accomplished wherever the equipment under
test is located
2-24. ACCESSORIES.
2-25. Table 2-1 lists the accessories supplied with the Communication System Analyzer. Optional equipment
available for use with the unit is listed in Table 2-2.
Figure 2-1. Accessories Supplied with Analyzer
2-4
Table 2-1. Accessories Supplied with the Communication Systems Analyzer
Equipment Motorola Part No. Use
Front cover
Sun shade
Power cord
Oscilloscope probe
In-line wattmeter adapter
Coax adapter
Antenna
Test microphone
Connector kit
15-80335A70
15-80335A55
30-80336A36
RTL-4058A
RTL-4055A
58-84300A98
TEKA-24A
RTM-4000A
RPX-4097A
Table 2-2. Optional Equipment for Use with Analyzer
Front panel and CRT protection, storage of cables,
power cord, and other equipment for on-sjte
servicing.
Snap over CRT during use in bright sunlight.
Three conductor cord to supply AC power to unit.
Also used when charging optional battery pack.
A X1 probe with attachments for general servicing.
Allows use of Motorola ST-1200 series in-line watt-
meter elements for direct measurement and display
of forward and reflected transmitted power.
Adapts front panel "N" connector to BNC female.
Plugs into RF in/out connector on front panel with
N to BNC adapter. Used for off-the-air transmitter
and receiver tests.
Used for voice modulation of signals.
Consists of connector shell, clamp, and four
connector pins. Used to fabricate a mating plug for
male dc power connector at back of analyzer.
Enables user to make a dc power cable to interconnect separate power source to analyzer. Pins 1
and 2 are positive, pin 3 is the charging line, pin 4 is
ground.
Equipment Motorola Part No. Use
IEEE-488 Standard
interface bus option
Blower
Consult factory
for retrofit
information.
RTL-4054A
Enables fully automatic testing with the unit
by external control from a computer or
programmable controller.
Provides additional cooling in high ambient
temperature conditions
2-5
Table 2-2. Optional Equipment for Use with Analyzer (Cont)
Equipment Motorola Part No. Use
Battery pack
High-stability oscillator
module
Protective cover
RTP-1002A
RTL-1007A
RTL-4056A
13.6 volt battery and charger attaches to back
of the unit. Provides one hour of continuous operation.
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
SECTION 3
INSTALLATION
3-1. PACKING INFORMATION
3-2. The unit is packaged in a fiberboard carton and protected by foam pieces as shown in figure 3-1. The unit
is first packed in a cardboard container and then thiscarton is packed in asecond, larger cardboard container,
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 latches on the bottom of the cover. Lift the cover and 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 200-260 Vac, 47-63 Hz
must be used.
3-1
NOTE
The unit is set for 110-130 Vac operation from the factory. For operation from 1 GO-
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 exposing the 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 a vehicle, the DC supply line should be fused close to
the vehicle battery. The analyzer is protected against overload by the DC 8A fuse on
the rear of the unit, but the vehicle is not protected.
3-6. BATTERY PACK. The battery pack is attached to the rear of the analyzer with two clips and two screws.
Align and slide the mounting clips of the battery pack into the slots on the mounting brackets on the left side of
the back panel of the analyzer. Align the captive screws with the mounting holes on the right of the panel and
tighten. Connect the power plug to the connector at the top right of the rear panel.
3-7. BLOWER ASSEMBLY. The blower assembly comes from the factory wired for continuous operation.
That is, the blower will run whenever the analyzer is connected to the AC power line. If thermostatic operation
is desired the wire jumper across the thermostat in the blower assembly must be clipped out. The blower will
now run only when the back panel exceeds a preset operating temperature. Normally this temperature will only
occur in high ambient temperature conditions.
3-8. The blower assembly is mounted onto the rear of the analyzer in the same manner as the battery pack.
Align and slide the mounting clips of the blower into the slots of the mounting brackets on the left side of the
back panel. Align the captive screws with the mounting holes on the right of the panel and tighten. Connect the
power plug to the BLOWER connector on the right side of the rear panel.
3-2
SECTION 4
OPERATION
4-1. GENERAL
4-2. This section contains information tor 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
Item Description Function
FRONT PANEL (fig. 4-1)
Keyboard
V
<l
0 through 9
• Intensity
• Focus
Dispr/Sweep control
Twelve-key pushbutton
keyboard
Line cursor key
Horizontal cursor key
Numerical keys
Stacked concentric
potentiometers
• Intensity - center
(small) knob
• Focus - outside
(large) knob
Potentiometer
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.
4-1
POWER OISPLAV
4-2
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•
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•
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• FreqCounter
• DVM
•
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. IF
•
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•
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• FM
•
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•
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•
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•
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• SWP 01-1 MHz
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Figure 4-1. Controls, Indicators, and
~1
M a
a:.:
• ~)
Vert
V•""'"''
II
II
Figure 4-2. Controls, Indicators, and Connectors, Left Side Panel
.
Figure 4-3. Controls, Indicators, and Connectors, Rear Panel
4-3
Table 4-1. Controls, Indicators, and Connectors (Cont)
Item Description Function
RF Scan (Hz/Sec)
switch
POWER switch
Batt indicator
AC indicator
Oven Ready indicator LED (red)
DISPLAY indicators Twelve LEDs (red)
Eleven position switch
Three-position toggle
switch.
LED (red)
LED (red)
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,
10
kHz,
100
kHz
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. Gen/Mon Mtr — In the generate mode the
center frequency, output power, and modulation depth of the RF output is displayed. In
the monitor mode the center frequency,
input power, frequency error, and modulation depth of the received carrier is
displayed.
b. Modulation — The modulation audio in the
generate mode or the demodulated audio in
the monitor mode is displayed.
c. Spect Analyzer — The spectrum analyzer
mode is enabled. The RF spectrum and the
operating center frequency is displayed.
4-4
Item Description Function
FUNCTION switch
Table 4-1. Controls, Indicators, and Connectors (Cont)
d. Duplex Gen — The duplex generate and
monitor frequencies are displayed. The
depth of modulation on the generator output
or on the received carrier is indicated for the
generate and monitor modes respectively.
For this display, the function switch only
selects which modulation reading is displayed.
e. RF Memory — The nine stored RF frequen-
cies or DPL codes with their corresponding
PL and the current frequency in use are displayed.
f. Tone Memory — The user selectable param-
eters for the code synthesizer are displayed.
These include the tone A and B frequencies,
the signaling sequence, and the programming
for each of the eiqht sequences available.
g. Freq Counter — The frequency of the signal
input to the front panel frequency counter
jack is displayed.
h. DVM — The AC or DC level of the signal at
the front panel DVM jack is displayed. The
AC or DC mode is selected with the display
cursor and the keyboard. The battery voltage
is also displayed.
i. Ext Wattmeter — The external wattmeter
element selected and the forward and reflected power being passed thru that element
are displayed. The element select is changed
by entering the appropriate range number
with the keyboard.
j. IF — The 455 kHz IF signal from the monitor
' receiver is displayed.
k. Scope AC — The voltage waveform applied
to the front panel vertical input is displayed.
The vertical input is AC coupled.
I. Scope DC — The voltage waveform applied
to the front panel vertical input is displayed.
Three-position toggle
switch
The vertical input is DC coupled.
Controls the function of the equipment. The mode
is shown by the LEDs.
a. Gen - equipment generates and outputs an
RF signal.
4-5
Item Description Function
FUNCTION indicators
Table 4-1. Controls, Indicators, and Connectors (Cont)
b. Pwr Mon - equipment monitors input signals
with the input terminated into the internal
power meter. This position must be used for
inputs of 0.2 watts and greater.
c. Monitor - equipment monitors input
signals with the input terminated into the
receive mixer. This position is used for
"off the air" monitoring.
Six LEDs (red)
Indicates the mode or type of signal the equipment is set up to monitor or generate:
a. FM - equipment generates or monitors
frequency modulated signals.
b. CW - equipment generates an unmodulated
RF signal. Monitor CW provides frequency
error measurement only.
c. AM - equipment generates or monitors
amplitude modulated signals.
d. SSB/DSBSC - equipment generates a
double sideband suppressed carrier signal.
NOTE: The level of the DSBSC signal
generated is not calibrated, it is for use in
relative measurements only. Monitor SSB
mode receives SSB signals with the use of
the BFO.
MODULATION
SWITCH
Three position'
switch
e. SWP 1-10 MHz - equipment generates a
swept RF signal having a sweep width of 1
to 10 MHz, controlled by the Dispr/Sweep
control. Selection of Monitor Sweep has no
effect, equipment remains in generate mode.
f. SWP 0.01-1 MHz - equipment performs as in
e. above except the sweep width limits are
0.01 MHz to 1 MHz.
Controls the Code Synthesizer modulation source.
Code Synthesizer mode is shown by the LEDs.
a. Cont - Continuous modulation signal output.
4-6
Table 4-1. Controls, Indicators, and Connectors (Cont)
Item Description Function
FRONT PANEL (fig. 4-1) (Cont)
b. Off - Turns off signal. When the mode is
DPL or DPL Inv, returning the switch to Off
from Cont produces a 133 Hz tone burst
for a 120 ms duration.
c. Burst - For PL, tone A, and tone B modes the
output is present for as long as the switch Is
held in the burst position. For the A/B mode
the burst position causes a single signaling
sequence to be output. For the DPL and
DPL Inv modes the Burst position causes a
133 Hz tone to be output. For the Tone
Remote mode either the Burst or the Cont
position causes a tone remote access
sequence to be output. The access sequence
leaves tone A at a low level for transmit-type
commands until the switch is returned to the
Off position. This switch is spring loaded to
return to the Off position from the Burst
position.
CODE SYNTH Mode
indicators
Six LEDs (red)
When illuminated, indicates the selected mode of
the Code Synthesizer.
a. PL/DPL Indicator
PL - Selected Private Line frequency output
to 1 kHz
DPL - Selected Digital Private Line code output
Maximum code number is 777.
b. PL/DPL Inv indicator
PL - Same as above
DPL - Inverted output of selected Digital
Private Line code. Maximum code number is
777.
The Private Line frequency or the Digital Private
Line code is selected from the RF memory display
or entered from the keyboard on the Gen Mon
Mtr display.
c. Tone A indicator
Indicates Tone A selected for output
d. Tone B indicator
Indicates Tone B selected for output
4-7
Table 4-1. Controls, Indicators, and Connectors (Cont)
Item Description Function
e. A/B indicator
Indicates Tone A/Tone B signaling sequence
will be output. See Tone Memory Table
example, figure 4-9.
f. Tone Remote indicator
Indicates access sequence for Motorola
Repeater will be output.
Tone A and B frequencies are entered from the
keyboard on the Tone Memory Display.
DISPLAY
select switches
FUNCTION
select switches
Code Synth
Mode select
switches
Code Synth Lvl
control
Ext Level control
Mic connector
Ext Mod
In
connector
1 kHz Level control
Two-pushbutton
switches
Two-pushbutton
switches
Two-pushbutton
switches
Potentiometer
Potentiometer/switch
4-pin connector
BNC connector
Potentiometer/switch
Selects the function to be displayed by the
equipment, as indicated by the DISPLAY LEDs,
a. ^ - moves the selection up one step at a
time
b. V - moves the selection down one step at
a time
Selects the type or mode of signal the equip-
ment will generate or monitor as indicated by
the FUNCTION LEDs. Operation is the same as
for the DISPLAY select switches.
Selects the Code Synthesizer output mode as
indicated by the CODE SYNTH MODE LEDs.
Operation is the same as for the DISPLAY
select switches.
Controls the level of Code Synthesizer for
modulation or MOD Output.
Controls modulation level of external input
(microphone and other external generators).
Switch at full counterclockwise position disables
external modulation inputs.
Microphone input. Provides microphone bias
and PUSH TO TALK (GENERATE) connection
to equipment.
External modulation signal input.
Internal 1 kHz tone modulation level control.
Switch at full counterclockwise position disables
1 kHz modulation tone.
4-8
Table 4-1. Controls, Indicators, and Connectors (Cont)
Item Description Function
Mod Out connector BNC connector
Volume control
BW switch
BFO control Potentiometer/switch
Sig Lvl/Zero Beat
indicator
Squelch control Potentiometer
Image/Dplx switch Two-position switch
Demod Out
connector
Oscilloscope Horiz
switch
Potentiometer
Two-position switch
LED (red)
BNC connector
Seven-position
rotary switch
Output connector for all modulation signals
(all signals combined).
Controls speaker output level.
In either Pwr Mon or Monitor modes selects
IF bandwidth. NB is ±6 kHz mod acceptance
bandwidth. WB is ±100 kHz mod acceptance
bandwidth. In Gen FM mode selects modulation
range. 0-25 kHz dev in NB mode or 0-100 kHz
dev in WB mode.
BFO on/off and beat frequency control
for sideband reception. Full Counterclockwise
position is off.
NOTE: To minimize interference the BFO
should be turned off when not in use.
Flashes at a rate equal to the difference
between the received carrier frequency and the
programmed frequency. Also is used as a
squelch indicator.
Adjusts squelch threshold level, full counterclockwise position disables squelch.
NOTE: Monitor sensitivity is greatly decreased
(for high-level use) as the control is increased
clockwise beyond the quieting point.
In duplex generation mode, controls the duplex
frequency output for above (High) or below
(Low) the receive programmed frequency. In the
monitor mode it selects the frequency of the
local oscillator injection above or below the
programmed monitor frequency to remove
image interference.
Receiver audio output.
When in the oscilloscope mode, selects the
horizontal sweep rate or selects the external
horizontal input.
4-9
Table 4-1. Controls, Indicators, and Connectors (Cont)
Item Description Function
Horiz Vernier control
Ext Horiz
Trig Level
Position controls
• Vert
• Horiz
Vert switch
Vert Vernier control Potentiometer
Vert/Sinad/DVM/
Counter In connector
Potentiometer
BNC connector
Stacked concentric
potentiometer and
switch
Stacked concentric
controlled potentiometer
Center (small) control
knob
Outside (large) control
knob
Four-position rotary
switch
BNC connector
Horizontal sweep rate Vernier or external horizontal input gain Vernier. Calibrated position
Is fully clockwise.
Allows external horizontal inputs for oscilloscope.
Selects oscilloscope trigger level and trigger
mode. Center knob selects the level of trigger.
Outside (largest) knob controls the trigger
mode. In Auto position, continuous sweep with
no vertical input signal, syncs on vertical input.
Normal position, no sweep unless vertical input
is present, syncs on vertical input.
Controls the position of the CRT display, when
in the oscilloscope mode.
Controls the vertical position of the CRT
display
Controls the horizontal position of the CRT
display
Oscilloscope operation uses values marked to
the right of the switch, indicating volts per
division on the CRT. Values marked to the left
of the switch are used during modulation
display mode, indicating range for calibrated
FM deviation.
NOTE: Frequency Counter sensitivity
is also controlled by this switch.
Vernier gain control for vertical inputs to the
CRT when in the oscilloscope mode. Fully
clockwise is the calibrated position.
Signal input to the equipment for the following
operations:
a. External vertical for oscilloscope
operation
b. SINAD Meter
c. Frequency Counter
d. Digital Voltmeter
4-10
Table 4-1. Controls, Indicators, and Connectors (Cont)
Item
Type N connector
Potentiometer
14-position ganged
atten and switch
-
Ext Wattmeter
Freq Set controls
• Coarse
• Fine
Frequency offset
control (0-10 MHz/Off
/45 MHz)
Output connector
Frequency Standard
control
BATT 5A
DC8A
Description
RF In/out connector
RF Level Variable
control
RF Level Step
switch
Connector
Stacked concentric
potentiometers
Inside (small) control
knob
Outside (large) control
knob
Three-position switch
BNC connector
SIDE PANEL (fig. 4-2)
Potentiometer
REAR PANEL (fig. 4-3)
Line fuseholder (5 amp)
Line fuseholder (8 amp)
Function
RF input in the power monitor or monitor
mode, RF output in the generate mode.
Vernier control of RF output level. Exceeding
the AM limit marking in AM generation mode
may result in a distorted output.
Ten dB per step control of RF output level
in generate mode. Also serves as RF input
level step attenuator in monitor and spectrum
analyzer modes.
Allows input from Motorola ST-1200 series inline wattmeter elements for measurement and
CRT display of forward and reflected transmitted power.
Controls the duplex generator output frequency
in the Duplex Generation mode.
Coarse frequency control.
Fine frequency control.
Selects the offset of the transmitted frequency
from the selected receive frequency (Image/
Dpix switch determines side of selected
frequency the offset will be). 0-10 MHz position
allows frequency offset to be varied between
0-10 MHz. In the 45 MHz position the offset
Is variable over a small range around 45 MHz
with the use of the Fine frequency control.
Output connector for duplex generator output.
Allows calibration of the time base frequency
(freq std)
Battery charger output line fuseholder.
DC Input line fuseholder
4-11
Table 4-1. Controls, Indicators, and Connectors (Cont)
Item Description Function
DC IN power
connector
AC power connector
AC 1.5A
10 MHz std IN
connector
10 MHz std OUT
connector
488 BUS connector
Blower power
connector
4-5. OPERATION
4-6. The operator may use the CRT display to become familiar with the functions the Communication System
Analyzer is capable of performing. The unit may be preset to any of the functions the unit performs. As a
function and its parameters are selected they are displayed on the CRT.
The unit contains a nonvolatile memory that stores frequently used data for fast access, reducing setup time.
As a function is selected, if data for that function is stored, the data is displayed on the CRT.
4-pin connector
3-pin connector
Line fuseholder
BNC connector
BNC connector
Connects to DC prime power source
Connects to AC prime power source. Internally
patched to accommodate either 100-110 VAC,
110-130 VAC, 200-220 VAC or 220-260 VAC.
AC line fuseholder.
Provides for external 10 MHz time base input.
Equipment automatically switches to external
time base with an input at this connector.
Provides an output of the internal or external
10 MHz time base for external use.
Placement of I/O connector when IEEE-488
Interface Bus option is provided.
Placement of Blower power connector, when
Blower option is provided.
One of the stored parameters may be used or the user may manually select (keyboard entry) the parameters
required for the function. Selection of stored data or keyboard entry of data is cursor controlled. As a control is
changed the CRT display changes to reflect the new parameter being used or function being performed.
4-7. CALIBRATE. The Communication System Analyzer may be calibrated to WWV or other
time/frequency standards (figure 4-4). To calibrate the unit's time base (frequency standard) proceed as
follows:
a. Connect antenna to RF In/Out connector.
b. Set FUNCTION switch to Monitor and DISPLAY to Gen/Mon Mtr.
c. Enter frequency of time/frequency standards station directly from keyboard.
4-12
d. Select AM function.
e. Using a tuning tool, adjust time base frequency calibration control (on left side of housing) until CRT
frequency error display indicates less than 5 Hz error. Frequency settability to 0.5 part per million can
thus be achieved using a 10 MHz frequency standard station.
NOTE
The time base output is also available on the rear panel for external measurement or
laboratory calibration to better than the 0.5 ppm achievable with the above method.
NOTE
An external time base input is also provided on the rear panel.
RFIN/0<UT
R-2001A
FUNCTION
ANALOG
INDICATOR
OF CARRIER
ERROR
NEG % AM
";i.:Tor
an B
'-•
-15,
C.
-S.-.I
F;-
!':":• i0 100
IES.OOOO
INPUT MBIT;, ci.3
i
EF.tD": f": - 5,4
t:8.
1-M
..;;..'
ANALOG INDICATOR
OF
% AM
MH:
8521-22
• FREQUENCY
'J
. CARRIER
ERROR
•
POS % AM
Figure 4-4. System Analyzer Time Base Calibrate Test Setup and CRT Display
4-8. GENERATOR OPERATION. The system generates RF frequencies for FM, AM, CW, SSB, and DSBSC
types of transmission covering a range of 10 kHz to 1000 MHz. To generate a signal the FUNCTION switch is
placed in the Gen. position.
NOTE
An RF protection circuit to protect against damage due to inadvertent application of
RF power to the unit, when in a generate or sensitive monitor mode, is functional
over the full monitor frequency range of the equipment (2 to 1000 MHz).
The type of signal is selected using the FUNCTION select LED indicator column. The unit can deliver an output
of up to 1 volt into 50 Ohms. When in the AM generate mode the variable control (located in the RF SECTION
on the front panel) should not be set above the AM limit mark. Exceeding this may cause distortion in the
output.
4-13
NOTE
The RF protect circuit may trip if generator is run at full power output without having
a 50-ohm load connected.
4-9. DUPLEX GENERATION. When operating in the duplex generate mode the offset frequency can be set
to either 45 MHz or 0 to 10MHz (adjustable). The Image/Dplx switch sets the offset frequency above (high) or
below (low) the monitored frequency. When offset is in the 0 to 10 MHz range, the control range may include a
foldback region. If the generator is operated in this foldback area erroneous frequency output indications can
be given. Avoid areas where backward indication or a jittering display of the offset frequency are incurred. The
following is an example of the duplex generator being used to setup repeater levels.
a. Connect DUPLEX GEN output to repeater receiver antenna input and repeater transmitter signal
sample to RF In/Out connector. The Duplex Gen Output level is fixed at -30 dBm nominal.
b. Set FUNCTION switch to Gen and DISPLAY to Duplex Gen.
c. Select Duplex Monitor frequency (repeater transmit frequency) from memory table or enter directly
from keyboard.
d. Set DUPLEX GENERATOR frequency to repeater receiver frequency.
e. Adjust PL and test tone deviation to desired level on display.
f. Set FUNCTION switch to Monitor and measure the deviation of the repeated signal.
NOTE
Switch function to power monitor and connect repeater transmitter (under 125
watts) directly to the RF In/Out connector to read power and frequency error, as
well.
DUPLEX RF
OUTPUT IN/OUT
?
?
REPEATER REPEATER
RF
IN
.
RF
OUT
Figure 4-5. Duplex Generation Test Setup and CRT Display
R-2001A
NEG DEVIATION
OF REPEATEO SIGNAL '
OEVIATION ALARM
SETTING
FUNCTION -
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4-14
8521-27
REPEATER XMIT
FREQUENCY
. REPEATED
RECEIVED FREQUENCY
POS DEVIATION
' OF REPEATED SIGNAL
4-10. FREQUENCY COUNTER. The frequency Counter measures inputs in a range from 10 Hz to 35 MHz.
The in put to the frequency counter is through theVert/Sinad/DVM/Counterin, BNC connector (located in the
OSCILLOSCOPE section of the front panel). The counter sensitivity is controlled by the scope Vert switch.
The following shows the minimum sensitivity for each switch setting:
Switch setting Sensitivity
——————— —————
0.01
50
0.1 500
1.0
5V
10.0
50V
The autorange output of the counter is displayed on the CRT to a resolution of 0.1 Hz or 5 digits.
NOTE
Do not connect transmitter directly to the frequency counter input. Instead use the
RF In/Out connector and the frequency error meter for transmitter frequency
measurements.
4-11. SPECTRUM ANALYZER. Input to the spectrum analyzer is through the RF In/Out connector. Select
the spectrum analyzer position on the DISPLAY column. Place the FUNCTION switch in the monitor position.
Select the desired width of sweep by the Dispr/Sweep control. The center frequency is selected from the
memory or entered directly from the keyboard, it is displayed at the top-right of the CRT. The following is an
example of locating the frequency of an incoming signal with the spectrum analyzer.
a. Connect antenna to RF IN/OUT connector.
b. Set FUNCTION switch to Mon. and DISPLAY to Sped. Analyzer.
c. Select center frequency from memory table or enter directly from keyboard.
mV
mV
RMS
RMS
RMS
RMS
d. Adjust Disp/Sweep control for desired spectrum span.
e. Adjust Step attenuator \f required to reduce sensitivity.
f. To determine whether a given displayed signal is valid or being internally generated, flip the
Image/Dplx switch to the opposite position. If signal moves in frequency or disappears, it
then/represents an internally generated spurious response or received image.
g. Use the RF Scan control to move desired signal to center of the screen. If the signal is located to the
right of screen center line, move the RF Scan control clockwise into one of five positive stepping
modes. If the signal is to the left of screen center line, turn the RF Scan control counter clockwise to
one of five negative stepping modes.
h. Adjust Dispr/sweep.control fully counterclockwise for 1 MHz spectrum span.
i. Again use RF Scan to recenter signal on screen.
j. Set DISPLAY to Qen/Mon Mtr.
k. Now adjust the RF scan control to minimize any existing frequency error between the incoming signal
and the Monitor frequency.
4-15
The frequency indicated at the top of the screen is now that of the desired incoming signal. It can also
be monitored for call signs, etc.
NOTE
The spectrum analyzer is functional but uncalibrated for level measurements in
Power Monitor mode for transmitter testing with the built-in 125 watt 50 ohm load.
(Observe "RF LOAD OVERTEMP" warning for high power levels or extended
periods of use.)
Figure 4-6. Spectrum Test Setup and CRT Display
4-12. MONITOR. The analyzer is capable of monitoring the same frequencies that it generates (para 4-9).
Select Gen/Mon Mtr in the DISPLAY column and the modulation type in the FUNCTION column. Set the
FUNCTION switch to the Monitor position for small signal samples or off the air monitoring. For high power
signal monitoring (0.2w to 125w), set the FUNCTION switch to Pwr Mon.
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.
NOTE
High-powered equipment in the 1-30 MHz range, which has unusually fast carrier
rise times, may damage the system analyzer with repeated activation of the protect
circuit. Ensure the FUNCTION switch is in the Pwr Mon position (this enables the
protect circuit) before RF power is applied to the equipment.
In the monitor mode the CRT displays the type of signal being monitored, the selected frequency, power, error
of the received frequency, and the modulation level.
4-16
4-13. EXT WATTMETER. When the analyzer DISPLAY is set to the Ext Wattmeter mode and the Motorola
RTL-4055A in-line wattmeter adapter (supplied) is connected to the Ext Wattmeter jack the analyzer measures
both forward and reflected power. The power rating of the wattmeter elements (Motorola ST-1200 series"), to
be used, are displayed on the CRT. The following is an example of a test setup for external wattmeter
operation. Figure 4-7 shows the test set connections and CRT display.
a. Select the EXT Wattmeter function by means of the arrow keys located below the DISPLAY column.
b. Plug the connector of the RTL-4055A In-Line Wattmeter adaptor into the "Ext-Wattmeter" jack located
on the RF SECTION of the front panel.
c. Using the keyboard; enter the single digit which corresponds to the full scale power rating of the ST-
1200 series element you plan to use.
d. Place the ST-1200 element In the In-Line Wattmeter adaptor and install element/adaptor assembly into
transmission line.
NOTE
Arrow on In-Line Wattmeter Adaptor must point in the forward direction of the
desired rf power flow through the adaptor.
e. Key transmitter and observe magnitudes of forward and reflected power as displayed simultaneously
on the 2 analog meter bars and corresponding digital readouts.
R-2001A
EXT
WATT METER
-— OF REFLECTED
RFTO
ANTENNA TRANSMITTER
RFFROM
POWER
FUNCTION
ANALOG
INDICATION
OF FORWARD
POWER
ANii nr,
INDICATION
W
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500
1000
B
0.0
100
0.0
100
8521-12
WATT METER ELEMENTS
TABLE
)-
FORWARD POWER
READING
REFLECTED POWER
READING
Figure 4-7. Wattmeter Test Setup and CRT Display
4-14. SIMULTANEOUS GENERATE AND MEASUREMENT OPERATIONS. The following test setups and
CRT displays are examples of simultaneous generating and measurement operations.
a. FM Mobile radio setup for receiver sensitivity using Generator and SINAD meter.
1. Connect RF In/Out to mobile radio antenna connector and multipurpose measurement (SINAD)
input to receiver audio output.
'Contact your Motorola Parts Source for ordering separately.
4-17
2. Set FUNCTION switch to Gen. and DISPLAY switch to Gen/Mon Mtr.
3. Select frequency from RF memory table or enter directly from keyboard.
4. Adjust 1 kHz level for 3.0 kHz deviation and RF level for 12 dB SINAD indication. (The mobile
radio audio output may be set to the desired level using the DVM AC mode.)
5. Read receiver SINAD sensitivity in microvolts or dBm.
R-2001A
VERT/SINAD
RF IN/OUT IN
OVM/COUNTER
^-H——
MOBILE
RECEIVER
FUNCTION -—
ANALOG SINAD
INDICATOR --*•
NEG DEVIATION -»•
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11H;
—- DPL CODE
<- POS DEVIATION
——ANALOG
8521-23
RF OUTPUT
LEVEL
DIGITAL SINAD
READING
DEVIATION
INDICATOR
Figure 4-8. Test Setup for FM Receiver Sensitivity Using Generator and SINAD Meter with CRT Display
b. Test pager decode and alert function, and demonstrate simultaneous modulation.
1. Set FUNCTION switch to Gen and DISPLAY to Tone Mem.
2. Select pager frequency from RF memory table or enter directly from keyboard.
3. Enter pager tone code frequencies and select desired time sequence in memory table.
4. Activate and adjust Code Synth. Lvl. for 3.3 kHz deviation on Gen/Mon Mtr. display. (5 kHz
system)
NOTE
Timing sequences 1 through 4 are preset and can not be changed. Timing
sequences 5 through 8 are keyboard programmable for testing other pager types,
upper and lower timing limits, or future schemes.
4-18
MIKE
Y;
7
R-2001A
RFIN/OUT MIC IN
T————=
t IICCDTIM11- f
PAGER
ATONE
FREQUENCY -*•
PROGRAMMED (
CAN NOT
CHANGE I,
SEQUENCE"1
(MAY BE
CHANGED)
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30
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30
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10
GBP
BTONE
" FREQUENCY
ll- TONE ONLY TIME SEQUENCE
S- TONE WITH BATT SAVER TIME
—— TONE AND VOICE TIME SEQUENCE
CL
'"1- GROUP CALL TIME SEQUENCE
8521-26
Figure 4-9. Test Setup for Pager and Alert Functions with CRT Display
c. Troubleshooting Receiver audio stages using "DVM and Signal Generate" function simultaneously.
1. Select the DVM function by means of the arrow keys located below the DISPLAY column.
2. Using the keyboard "down" arrow position the CRT cursor adjacent to the "DVM Mode"
graphics.
3. Enter a "1" via the keyboard to select AC voltage measurement or a "2" for DC voltage
measurement selection.
Set up the desired on-channel RF signal to provide an input to the receiver.
Set Function switch to "Gen". Set appropriate RF output level (as indicated on the CRT screen).
Apply test signals from the receiver audio stages to the instrument's "Vert/Sinad DVM/Counter
In" input. DC Voltage measurement points are also applied to this same input. The supplied XI
test probe may be used.
Refer to the CRT screen for an auto-ranging and analog/digital indication of either DC voltage
or AC voltage and corresponding dBm level.
NOTE
The AC DVM indication of dBm is referred to 600 ohms.
4-19
R-2001A
FUNCTION
ICNITDE FM g) 151.9550 m:
-FREQUENCY
RF IN/OUT DVM/COUNTERIN
VERT/SINAD
T T
RADIO
UNDER
TEST
ANALOG
INDICATION
OFDVM
READING
0
10
- 1 .(
PE'.' RLflF'M 05,0 KHZ (flT 0.0 '
INPUT UflTTS 0.00
tBM
'.;
flC
.(45
cvn MDIIE i i i > flc
E>
1C
Figure 4-10. Test Setup for Using DVM and Signal Generate with CRT Display
8521-24
»- DVM READING
^1 DVM SELECT
J~
AC
OR
DC
•»— BATTERY
VOLTAGE
4-20
SECTION V
MAINTENANCE
5-1. SERVICE
5-2. The Motorola Test Equipment Repair Center is charged with the service responsibility for all test
equipment supplied by the Motorola Communications Group. The center maintains a stock of original
equipment replacement parts and a complete library of service information for all Motorola test equipment.
5-3. Most in-warranty repair are performed at the center. Exceptions include repairs on some equipment not
manufactured by Motorola which are performed by the original supplier under the direction of the Test
Equipment Repair Center. Out-of-warranty service is performed on a time and materials basis at competitive
rates and the maximum turn-around goal is less than ten working days. Customer satisfaction is continually
surveyed by reply cards returned with repaired instruments.
5-4. The Test Equipment Repair Center also provides a convenient telephone troubleshooting service.
Frequently, a user technician can troubleshoot a piece of equipment and isolate defective components under
the direction of the Test Equipment Repair Center via telephone. Required replacement parts are then
immediately shipped to the user thereby reducing shipping time and servicing costs. For telephone
troubleshooting contact the Test Equipment Repair Center toll free at (800) 323-6967.
5-5. All other inquiries and requests for test equipment calibration and repairs should be directed to the Area
Parts Office. They will contact the Test Equipment Repair Center, process the necessary paperwork and, if
necessary, have the Center contact you to expedite the repair.
5-6. REPLACEMENT PARTS ORDERING
5-7. Motorola maintains a number of parts offices strategically located throughout the United States. These
facilities are staffed to process parts orders, identify part numbers, and otherwise assist in the maintenance
and repair of Motorola Communications products.
5-8. Orders for all replacement parts should be sent to the nearest area parts and service center listed below.
When ordering replacement parts the complete identification number located on the equipment should be
included.
5-9. ADDRESSES
5-10. General Offices
MOTOROLA INC.
Communications Division Parts Dept.
1313 E. Algonquin Rd.,
Schaumburg, Illinois 60196
Phone: 312-397-1000
Executive Offices: 1301 E. Algonquin Rd.,
Schaumburg, Illinois 60196
5-1
5-11. U.S. Orders
WESTERN AREA PARTS
1170 Chess Drive, Foster City,
San Mateo, California 94404
Phone: 415-349-3111
TWX: 910-375-3877
MIDWEST AREA PARTS
1313 E. Algonquin Rd.
Schaumburg, III. 60196
Phone: 312-576-7322
TWX: 910-693-0869
MID-ATLANTIC AREA PARTS
7230 Parkway Drive
Hanover, Maryland 21076
Phone: 301-796-8600
TWX: 710-862-1941
EASTERN AREA PARTS
85 Harristown Road
Glen Rock, New Jersey 07452
Phone: 201-447-4000
TWX: 710-988-5602
SOUTHWESTERN AREA PARTS
3320 Belt Line Road
Dallas, Texas 75234
Phone: 214-241-2151
TWX: 910-860-5505
GULF STATES AREA PARTS
8550 Katy Freeway
Houston, Texas 77024
Phone: 713-932-8955
5-12. Canadian Orders
CANADIAN MOTOROLA ELECTRONICS COMPANY
Parts Department
3125 Steeles Avenue
East Willowdale, Ontario
Phone: 516-499-1441
TWX: 610-492-2713
Telex: 02-29944LD
EAST CENTRAL AREA PARTS
12995 Snow Road
Parma, Ohio 44130
Phone: 216-267-2210
TWX: 810-421-8845
PACIFIC SOUTHWESTERN AREA PARTS
9980 Carroll Canyon Road
San Diego, California 92131
Phone: 714-578-2222
TWX: 910-335-1634
SOUTHEASTERN AREA PARTS
5096 Panola
Industrial Blvd.,
Decatur, Georgia 30032
Phone: 504-981-9800
TWX: 810-766-0876
5-13. All Countries Except U.S. and Canada
MOTOROLA INC., OR MOTOROLA AMERICAS, INC.
International Parts
1313 E. Algonquin Road,
Schaumburg, Illinois 60196 U.S.A.
Phone: 312-397-1000
TWX: 910-693-1592 or 1599
Telex: 722433 or 722424
Cable: MOTOL
5-2
5-14. MAJOR ASSEMBLIES
5-15. The Communication System Analyzer is designed for ease of maintenance. Most of the circuitry is on
seven plug-in circuit boards. A list of all subassemblies is given in table 5-1. The assembly locations are shown
in figures 5-1 and 5-2.
Table 5-1. List of Subassemblies
Ref.
Des.
A1
A2
A3
A4
A5
A5A*
A5B*
A6
A7
A8
A9
A10
A11
A11A1*
A11A2*
Item
Low Voltage Power Supply Module
Scope Amplifier Module
Scope/DVM Control Module
Receiver Module
Synthesizer Module
Digital Synthesizer Card
RF Synthesizer Card
Audio Synthesizer Module
Processor Input/Output Module
IEEE Bus Module (Optional)
Microprocessor/Character
Generator Module
High Voltage Power Supply Module
RF Input Module
Protection/Power Meter Card
Converter/Wide Band Amplifier
Card
Part Number
As Labeled
01-P00422N001
01-P00413N001
01-P00409N001
01-P00389N001
01-P00385N001
01-P00358N001
01-P00386N001
01-P00426N001
01-P00405N001
01-P00430N001
01-P00401N001
01-P00417N001
01-P00394N001
01-P00400N001
01-P00398N001
Replacement
Order Part No.
RTP-1000A
RTC-4007A
RTC-4008A
RTL-1002A
RTC-1001A
RTC-4009A
RTC-4010A
RTC-4011A
RTC-4012A
RTC-4013A
RTC-4014A
RTP-1001A
RTC-1002A
RTL-4061A^
RTC-4015A(-
A11A3*
A12
A13
A14
'These items are solder-in submodules listed for reference purposes. These cards are not normally repaired
or replaced individually.
Offset Generator Card
Front Panel Interface Module
Frequency Standard Module
Front Panel Assembly
Motherboard Assembly
5-3
01-P00399N001
01-P00421N001
01-P00368N001
01-P00366N001
01-P00441N001
RTC-4016A^)
RTL-4045A
RTL-1004A
01-80304A42
RTL-4060A
"'
Figure 5-1.
Figure
5-2.
Communication
Communication
System Analyzer,
System Analyzer,
Top
View Cover
Bottom
View Cover Removed
Rem
oved
8521-6
5-.4
5-16. THEORY OF OPERATION
5-5
5-17. General
5-18. The operation of the Communications System Analyzer can be divided into nine basic functions;
Generate, Power Meter, Monitor, Duplex Generator, Code Synthesizer, Frequency Counter, Digital Voltmeter
(DVM), Oscilloscope, and Sinad Meter. The general operation of the unit will simultaneously incorporate the
basic functions to provide the total capability of the system.
5-19. The following discussion will cover the block diagrams for each of the basic functions pi us a discussion
on the processor control of the system. A functional block diagram of the total system is shown in figure 5-3.
Only the major signal paths between each of the modules are shown to clarify the total system configuration.
5-20. System Control
5-21. System Control is the primary responsibility of the internal microprocessor. Front panel control and
system status inputs to the processor are manipulated by the processor to provide the control for the operating
mode. From the front panel the processor monitors the keyboards, the function select switch, the modulation
control switch, the RF scan switch, the image switch, the bandwidth switch, the horizontal and vertical range
switches, and the step attenuator switch. This information plus internal status information causes the
processor to display the appropriate information on the CRT to program the center frequency, to set up the
generate or monitor mode, and to make the internal switching arrangements for the selected operating state.
5-22. The interface to and from the microprocessor is via the processor bus. This bus consists of a 16-bit
address bus, an 8-bit data bus, and a 7-bit control bus. This bus interfaces the processor to its program
memory (ROM), scratch pad memory (RAM), IEEE interface, and the peripheral interface adapters (PIA).The
PIA is the mechanism by which the processor interfaces with the system. A PIA consits of a dual 8-bit latch
which may be programmed as either an input or output for the microprocessor. System input and control
information passes to and from the microprocessor via three system control buses attached to a PIA.
5-23. Each system control bus consists of a 4 bit address bus, a 4 bit data bus, and an enable line. The 4
address bits determine which of 16 possible latches the 4 bits of data is to be sent to or received from. The
enable line triggers the actual transfer of data. The three control buses within the system are called the RF
control bus and the AF control buses 1 and 2. The RF control bus is as described above while the AF control
buses consist of a single 4-bit address and 4-bit data bus and two enable lines. The resulting total input/output
capability for the system buses is 16 latches at 4-bits each times 3 buses or 192 bits. A tabulation of buses and
the controlling or input function of each bit is shown in table 5-2.
5-24. Systems with the IEEE remote control option interface the IEEE bus to the processor bus through a
general purpose interface bus adapter (GPIB) on the IEEE interface module. When enabled all control inputs
to the system pass through the IEEE bus and front panel controls are ignored. For more information on IEEE
control see section 22.
5-25. Generate Mode
5-26. The generate mode provides a variable level RF output that is phase locked to the internal 10 MHz
standard. AM, FM, and Sideband Modulation are possible on the output signal. A block diagram of the
generate mode is shown in figure 5-4.
EXT
MOD INPUT
MIKE INPUT
EXT
10
MHz
IN
IEEE
488
BUS
RF
IN/OUT
EXT
FWD
PWR
EXT RFL PWR
FRONT PANE
FRONT
VERT/SINAD/DVM
FR
EXT HORIZ
EQ
COUNT
L I
NPU
PANEL DISP
ER
INPUT
IN
•
TS
/
::3
<f)
::>
co
-'
0
g:
z
0
u
:::;;
u.J
1-
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10 MHz F
STANDARD
r---------
A
11
INPUT
I
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MODULE
ATT
A11A1
WATTM
- - -
FR
ONT
IN
TERFACE
1
I
I
L
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REO
RF
N
RF
IN/OUT
CT
AND
ETE
R
!~~~
A12
PAN
EL
MOD AUDIO
T
EXT DVM
BUS
10
MHz
FM
MOP
f-
- - -
OSB
MOO
RF
IN/
OUT
OPLX
MOO
- - - - - - -
O
FFSET FREO
E
XT
FRED
A6
AUDIO
SYNTHESIZER
AS
RF
SYNTHESIZER
SYNTH
RF
A11
A2
WIDEBAND AMPL
AND
DOWN
CONVRT
DP
LX
RF
IN
A11A3
DUPLEX
GEN
ERAT
PROCESSOR
----,
ER
-
RF
OUTPUT
LV
L
OR
---
t
A7
1/0
EXT 1KHz
MOD~
LVL
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M
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MOO Ol
CODE MOD
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TION
AUDIO
1
MOD AUDIO
AM AUD
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• DC LEVEL
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O •
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RF ATTEN
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TROL
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IEEE
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IDEBAND
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AKER
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OUT
PUT
~
DEMOD
C
RT
J
OUTPUT
RF
OCE
SSO
R B
US
M
RECEIVER
DVM INPUT BUSS
lc'GFO FREO
DVM
TO
AID
PROCES
CONV
A9
SOR
C
OEMOO AUD
SPE
ANAL
ERTER
CHAR. GE
ALI
BRAT
CTRUM
YZER
455 KHz IF
A
ND SYNC
ED
N Z·
VERT
AXIS
A3
SCOPE/DVM
CONTR
OL
-
r-
SC
OPE Z ·
SCO
SCOPE
AXI
PE VERT
INT HORI
S
OPE
FIER
I
CRT VERT
CRT
HOR
CR
T Z·
AXI
IZ
S
A2
SC
Z
AMPLI
S
YSTEM
S
COPE VE
CON
TROL BUSES
RT
FROM A TTENUATOR
I
NTE
RNAL
SCOPE
S
COPE
EXT
HOR
VERT
IZ
1
JUMPERS
IEEE
2
WITH IEEE
IS
CONTRO
OTHERWI
ARE INSTALLED WHEN THE
OPTION
IS N
OT
INST
ALLE
OPTION. THE
LLED
SE
FRO
Fi
RF
FROM THti'B MODULE.
NT PA
NEL CONTROLLE
gure
5-3.
D.
attenua
System
5-7'
5-8
to r
Blo
D
ck
Diagram
s
sn1
Table 5-2. Control Buses and Functions
AF
Synth
Synth
02
Bus #1
NO
N1
AF
Bus
#2
01
DO
D3
D2
01
Display Led's
Function Led's 1
DO
v
RF
Bus
~
03
ADRS ADRS
310-440
PLL
0
310-440
Pll
1
02
AO
NO
01
DO
03
Audio
Audio
0
310-440
PLL
2
60 Audio
PLL
3
60 DPL
PLL
4
60
PLL
5
60
PLL
6
10
-440 60
3
Pll
8
WB
MOD
9
En
ab Enab
0.011000
A
Sel
B
c
SSB
0 De mod
En
ab
WB/ NB
E
Sel
N1
NO
N1
N2
N3
PLL
500-1000
Out
En
ab
MOD
INV/INV
Sel
LOOP
INV/
iNil
Sel
AM
En
ab
Alarm
Enab
N4
A1
(MOD)
X
(2
)
500-700/
00-1000
VCO
Sel
FM
De mod Demod
Enab
De mod
INV/INV Log IF
Sel Sel
250-500
Out
En
ab
MOD
FM/SWP
Sel
MOD
Disable
De mod
To
Spkr
Enab
LIN IF/
Audio
PL
Se
MOD
To
Spkr
Enab
DPLX
MOD MOD
Enab Enab
Hor
Mode
Pwr
MTR
Enab
SSC3 SSC2
SSC7
F
Synth
N2 Mode Led 's 2
Synth
N3 3
DPL
CLK
l
Audio
30
DSBSC
Pk Del
FM MOD
lnt DVM
iz Scope Vert Scope
Sel
(Man + .
Scope Time
Scope
Sel
Enab
Aduio
Al
Allen
dB
20
FM
MOD MOD
Enab
DVM MODE
Se
lect
Pk
AM
Enab.
Enab
WB/NB
X
0.1
Sel
Enab
DSB)/
Gen
Sel
Base
SS
Time Base CTL
SSC5
SSC6
len
dB
Del
MOD
Mode Sel
CTL
C1
Input Scope Allen
0.
001
0.01
AUDIO
Synth
N4 S
Audio
Allen
10
AM
Enab
Pk
De
mod
Enab
IF
/BFO
Fr
Sel
01-1
/1-
Swp
Sel
ssco
SSC4
dB
Del
eq
10
RF
Allen Position 5
Sc
an
Switch Position
IF
SIG
Overl'd
Present
In
In
CSSG
CSSG
Cant
Burst
Sw
In
Sw
Vertical Switch Pas
Scope
--
____.. o.1v-
10
VI 1V-100kHJ10kHz
ON
~V
Man
Sw
DVM
AC/DC
Sel
Ctr/
S
el
In
Counter Input Sel
OVM
IF/BF
Horiz Switch Pas
0.1
Allen
lnt/E
xt
el
RF
Input
<+
20
dB
In
Hilla
Im
age
Sw
In
In
-1 o.
DN
Scope
Sw
In
Freq Cntr Range
O
Off set I Ext
1.0
Ext
AC/ DC
Sel
WB
/NB
Sw In
Gen
Sw
In
ow-
1kHz
ON
In
4
6
7 7
8
In
9
A
B
c
D
E
F
5-9
EXT
El
A13
10 MHz FREQUENCY
INPUT
STANDARD
Figure 5-4. Generate Mode Block Diagram
5-27. The Frequency Standard module (A13) contains a 10 MHz standard oscillator with buffering and
switching to provide a 10 MHz signal to the EXTERNAL 10 MHz OUTPUT and to the RF Synthesizer (A5). A
provision is made for the application of an EXTERNAL 10 MHz INPUT which causes the internal standard to
shutdown and the EXTERNAL 10MHz INPUT to be switched to the EXTERNAL 10 MHz OUT and to the RF
Synthesizer.
5-28, The 10 MHz standard input to the RF synthesizer is digitally divided down to provide SYSTEM REFF
FREQUENCIES for the frequency counter, the zero beat detector, the second local oscillator in the receiver,
and the processor timing reference. Additionally reference frequencies are provided for a fixed 550 MHz
locked loop and for a programmable 500 MHz-1000 MHz locked loop. The programming of the 500 MHz-1000
MHz locked loop is provided by the RF CONTROL BUS from the processor. The SELECT SWITCH selects one
of three possible output points for the SYNTH RF output signal. The first is from the 500 MHz-1000 MHz loop
directly. The second is from a divide by two on the output of the 500 MHz-1000 MHz loop which gives
frequencies from 250 MHz to 500 MHz. For outputs below 250 MHz, the output of the 500 MHz-1000 MHz loop
is mixed with the fixed 550 MHz signal and the difference signal used for the output. For this output the
processor programs the 500 MHz-1000 MHz loop for frequencies between 550.01 MHz and 800 MHz to obtain
outputs from 10 kHz to 250 MHz respectively.
5-29. FM and SWEEP Modulation is implemented within the 500 MHz-1000 MHz loop. FM capability is 200
kHz peak which when divided by two gives the 100 kHz peak requirement. Similarly the sweep capability is 10
MHz peak which provides the 5 MHz requirement for the sweep generator and spectrum analyzer
requirements.
5-10
5-30. The SYNTH RF signal is amplified and leveled in the RF Input module (AH). The signal level at the
output of the wideband amp is detected and compared to the AM MOD & DC REF signal from the front panel
level control. If there is a difference between the two signal levels, the ALC amp provides an error voltage. The
error voltage controls the attenuation of the Voltage Controlled Attenuator (VCA) in the direction that will
make the detected RF output equal to the AM MOD & DC REF signal. There are two possible VCA's for the
output leveling. The VCA within A11 is used for frequencies from 1 MHz to 1000MHz. For frequencies below 1
MHz, the VCA on A11 is set to minimum attenuation and the VCA on the RF Synthesizer module is used for
leveling. Amplitude modulation is incorporated by sum ing the modulation signal with the DC reference signal
to force the leveling loop to vary the output level in proportion to the modulating signal. The signal from the RF
level detector (CARRIER + MOD LVL) is used by the processor for the determination of RF output level and the
percent AM. The leveled output range of the Wideband Amp is from -3dBm to +13dBm (0.16 to I.OVrms).
5-31. The leveled output from the Wideband Amplifier is applied to the Generate/Monitor (T/R) switch. For
AM, FM, and CW signals the switch connects the amplifier output to the Step Attenuator. For Double Sideband
Suppressed Carrier (DSBSC) the T/R switch is in the "R" position where the amplifier output is connected to
the local oscillator port on the receive mixer and the attenuator is connected to the RF port. The DSBSC MOD
signal is then used to drive the IF port of the mixer giving a DSBSC signal at the RF port and thus at the Step
Attenuator.
5-32. Coarse level control in 10 dB increments is provided by the Step Attenuator. The total range of the
attenuator is from 0 dBto 130 dB attenuation. For the basic R2001 A the Step Attenuator is controlled directly
by a shaft to the front panel knob. With the IEEE control option the Step Attenuator is electrically
programmable and controlled by the processor. The front panel knob in this case is connected only to a rotary
switch which directs the processor in setting the attenuation level. Under IEEE control, commands via the IEEE
•bus determine the attenuator setting. (See section 22.)
5-33. The RF signal from the Step Attenuator passes through the input protection circuitry to the RF Output
jack. A level detector on the RF Output jack monitors the power level at the jack. If power in excess of 200 mW is
applied to the Output jack, the protection circuit will activate and switch the RF Output jack to the internal 50
ohm load. This action protects the Wideband Amp and Step Attenuator against burnout. A signal line from the
protection network signals the processor that the system is in the protected mode. The processor in turn
activates the CRT and alarm warnings.
5-34. Power Meter
5-35. Input power measurements are made with the RF Input terminated into an internal 50 ohm load. This
termination is the same one used for the protect mode when in the generate or monitor functions. A block
diagram of the power meter is shown in figure 5-5.
5-36. For the power meter mode the processor sets the WATT METER ENABLE line to cause the RF input
jack to be switched to the 50 ohm power termination. For modes other than the power meter, an Input Detector
on the RF Input jack detects when the input power has exceeded 200 mW and then switches the input to the
load.
5-37. The switch is a single pole double throw configuration so that when switched to the RF load the path to
the Step Attenuator and Converter is open circuited. However, leakage across the open switch provides
sufficient signal for operation of the normal monitor functions.
5-11
10.7
MHz
IF
RF INPUT PWR
OVER TEMP
7 ^ INPUT
PROTECTED
Figure 5-5. Power Meter Block Diagram
5-38. A sample of the RF voltage being applied to the RF Load is detected by the Power Detector to give a DC
output proportional to the peak RF voltage. The amplifier following the detector buffers and gain adjusts the
detected voltage to provide the RF INPUT POWER signal to the processor. The processor then determines and
displays the RF input power.
5-39. A Temperature Sensor located near the flange of the RF Load alerts the processor when the load
temperature exceeds 80° C. The processor reacts to the OVER TEMPERATUREsignal by displaying a warning
message on the CRT and by sounding the audible alarm.
5-40. Monitor Mode
5-41. The monitor mode allows RF signals from an antenna or from a transmitter directly to be checked for
frequency error, modulation level, and spectral content. AM, FM, and sideband modulations can be
accommodated with this system. A block diagram of the monitor mode is shown in figure 5-6.
5-42. The RF signal to be monitored is applied to the RF I nput jack on the RF Input module (AH). If the input
level is less than 200 mW the input signal passes directly through the Input Protection circuitry to the Step
Attenuator. For input levels greater than 200 mW the protection circuit switches the input to the internal load
and signal the operator to switch to the Power Monitor mode. In this case, RF leakage (paragraph 5-37)
through the protection circuits provides the input signal to the Step Attenuator.
5-43. For the monitor mode the T/R switch is set so that the RF input from the Step Attenuator is connected to
the RF port on the receive mixer. The output from the wideband amp is switched to the local oscillator porton
the receive mixer. The processor programs the RF Synthesizer for an output frequency that is offset from the
frequency to be monitored by 10.7 MHz. The offset may be above or below the center frequency as selected by
the front panel image switch.
5-12
Figure 5-6. Monitor Mode Block Diagram
5-44. The 10.7 MHz difference signal at the IF port of the receive mixer is amplified and selected by the first IF
Amplifier and Filter. The Amplifier provides sufficient gain so that the overall gain of the RF Input module is 10
±2 dB. The I F filter provides a modulation acceptance bandwidth of +100 kHz. The filter output is the 10.7 MHz
IF signal to the Receiver module (A4).
5-45. A second mixer in the receiver module down converts the 10.7MHz IF signal to 455 kHz by mixing the
input signal with a 10.245 MHz Second Local Oscillator. The Second Local Oscillator is phase locked to the 10
MHz system standard so that its frequency is as accurate as the standard. The phase locked loop for the
Second Local Oscillator is split between two modules. A 10.245 MHz SAMPLE signal is compared with the
REFERENCE FREQUENCIES from the RF Synthesizer on the Processor I/O module (A7). The comparison
provides a TRACKI NG VOLTAGE error signal to the 10.245 MHz oscillator which corrects its frequency to hold
it in lock.
5-46. Immediately following the second mixer is the IF filter. The IFfilter is selectable between a narrowband
(±6 kHz mod acceptance) and a wideband (±100 kHz mod acceptance) bandwidth. The bandwidth is under the
control of the processor and is selected by the bandwidth switch on the front panel.
5-13
5-47. The output signal from the IF filter has two possible paths. The path to the Log Amplifier and Detector
provides the spectrum analyzer capability. The other path is the linear IF Amplifier for AM, FM, and SSB
demodulation. The output level of the Amplifier is detected to give amplitude modulation and to provide the
AGC control on the IF amplifier. The IF signal is applied to the FM Demodulator and issenttotheScope/DVM
Control module (A3) for SSB demodulation and for frequency error determination.
5-48. Demodulated audio from the selected demodulator is routed to the Audio Filter by the Select Switch
under processor control. The Audio Filter provides post detection filtering for both wide and narrow band
modes. The output of the Audio Filter is three signal lines. The Demod Calibration Audio line provides the
calibrated audio levels for modulation level determination. A Demod Audio output provides a level adjusted
signal to the front panel Demod Out jack. Speaker audio is level adjusted by the front panel volume control and
then amplified by the Audio Amplifier on the Receiver module.
5-49. The Audio Amplifier sums the audio from the demodulator with the Alarm audio. The Audio Amplifier
provides a 0.5 watt output capability to the system's internal speaker. The Alarm generator is under the control
of the system processor.
5-50. SSB demodulation is implemented on the Scope/DVM Control module by multiplying the 455 kHz IF
signal from the Receiver with a signal from the Beat Frequency Oscillator (BFO). The BFO is controlled from
the front panel and typically has a frequency range of 455 ±3 kHz. The BFO signal is switched with the output of
the 455 kHz IF Phase Locked Loop (PLL) to the frequency counter for frequency error determination. The 455
kHz PLL filters and shapes the IF signal to make it suitable for frequency counting.
5-51. When in the spectrum analyzer mode the linear IF Amplifier is shut down and the Log Amplifier is
activated. The output of the Log Amplifier and Detector is a DC voltage that is proportional to the log of the 10.7
MHz IF input level. The log circuit has a dynamic range of approximately 80 dB, covering input levels from-100
dBm to -20 dBm. The SPECTRUM ANALYZER signal from the Log Amplifier is the vertical input to the scope
for the spectrum analyzer display.
5-52. Duplex Generator
5-53. Simultaneous generate and monitor functions are available with the use of the Duplex Generator. The
frequency spread between generate and monitor frequencies is limited to a range of 0 to 10 MHz and a fixed
frequency of 45 MHz. A block diagram of the Duplex Generator function is shown in figure 5-7.
5-54. The Duplex Output signal is generated by mixing the local oscillator signal for the first receive mixer
with a signal from the Offset Oscillator. The Offset Oscillator is at the frequency equal to the desired spread
between generate and monitor frequencies less the 10.7 MHz IF offset. The monitor function is unaffected by
the duplex mode and operates as described under paragraph 5-40.
5-55. Frequency modulation of the duplex output is obtained by modulating the Offset Oscillator frequency
via the OFFSET MOD signal line. Control of the Offset Oscillator is directly from the front panel of the system.
A OFFSET FREQUENCY output from the oscillator provides an input to the frequency counter for the
determination of the duplex frequency.
5-14
Figure 5-7. Duplex Generator Block Diagram
5-56. Code Synthesizer
5-57. Three simultaneous modulation sources are possible with the internal Code Synthesizer, A private line
(PL) or Digital Private Line (DPL) source, a fixed 1 kHz source, and external modulation sources are
individually level controllable and sumed together to give the composite modulation audio. The Code
Synthesizer provides the modulation source for the system in the generate mode and can be used as an audio
frequency source when in the monitor mode. For the IEEE option a provision is made to allow processor
control of the modulation levels. A block diagram of the Code Synthesizer is shown in figure 5-8.
5-58. The PL signaling sequence generator is an Audio Synthesizer with an output frequency range from 5 Hz
to 10 kHz in 0.1 Hz steps. The frequency is programmed by the processor in response to the operator's request
from the keyboard through the CRT display. The Programmable Attenuator following the synthesizer provides
10 dB and 30 dB attenuation levels for the tone remote access sequence.
5-59. DPL Code words are generated by the processor in response to the code entered by the operator. The
23-bit DPL word is stored in the DPL Generator and continuously output when selected. Either PL or DPL
signals are switched to the Code Synthesizer Level control on the front panel.
5-60. A 1 kHz reference signal from the RF Synthesizer is bandpass filtered to provide a low distortion 1 kHz
sinewave to the front panel 1 kHz Level Control.
5-61. Two sources of external modulation are possible. A standard Motorola microphone interface jack on
the front panel and a BNC front panel jack are provided. The microphone input is connected to an IDC circuit
.for peak limiting. The composite of the two external modulation sources is the signal to the External Level
control on the front panel.
5-62. Systems without the IEEE option will have the wipers of the level control pots jumpered to their
respective inputs to the summation amp on the Audio Synthesizer module (A6). Those systems with the IEEE
option will select on the IEEE Interface module (A8) either the tops of the level controls or their wipers to the
Programmable Attenuators for remote or local control respectively. While in the IEEE Control mode the
processor controlled Programmable Attenuator on the IEEE module provides the modulation level control. For
the local mode the attenuators are programmed for zero attenuation so that the wipers of the level controls set
the modulation levels directly.
:
5-15
'
SYNTH 42
REF
——
(1 KHz)
A6 AUDIO'S
AUDIO
SYNTH
1
YNTI
'•"• | . CONTROL
^ESIZER
PRGM
ATTEN
DPL
GEN
1 KHz
BPFL
SEL
|"
126
.40
1
—
146
28
CODE ^ .I;
LVL
<>
1KHz
<^
A8 IEEE ^TE?
SEL
SW
SEL
SW
FAC
PRGM
ATTEN
PRGM
ATTEN
A9
ROCESSOR
^w
•
1
MIC-2.
EXT
'4
MOD
IDC
——
1
1
[—
"
SEL
SW
^
';
/
\
—————————————'4S - AUDIO SPKR
^
1
-^
^
164
'>^62 6
bV ^ ,
r————l <• 3
156,
1 " ""
—————-^-
————p^-
IS . l^.^-MnnniiT
DRIVER
J
24
34
•66
"36
l68
301
421
I
„.
S
1
DUPLEX MOD
DSBSC MOD
M
no <:,35|
LVL
<^
^
-=•
"F
LVL
SEL
SW
SEL
SW
PRGM
ATTEN
PRGM
ATTEN
-
4
IEEE
"BUS
AM
MOD+
DC REF
Figure 5-8. Code Synthesizer Block Diagram
5-63. The three modulation sources are sumed together on the Audio Synthesizer module after the level
controls. The composite modulation signal is then switched to the appropriate modulator and applied to the
modulation determination circuitry (MOD CAL AUDIO), the audio amplifier (SPKR AUDIO), and the
Modulation Output jack (MOD OUT) on the front panel. The signal to the front panel jack is buffered by a Driver
Amplifier to provide a low driving source impedance.
5-64. The AM modulation signal at the output of the Select Switch is sumed with a +5 volt signal. This
combination provides a DC level to control the average output power of the wideband amp in the RF Input
module, and a superimposed modulation signal to give an AM output. The RF Level control on the front panel
for local control or the Programmable Attenuator on the IEEE module provide local or remote RF level control
by simultaneously attenuating the DC level and the modulating signal. The resulting signal is the AM MOD &
DC REFERENCE signal to the RF Input module.
5-16
5-65. Frequency Counter
5-66. Three possible signal sources are made available to the frequency counter for frequency
determination. Two of the inputs are from internal system points for the determinations of the offset frequency
(OFFSET), and the monitored carrier error frequency (IF/BFO). The third input is the external input (FREQ
CNTR INPUT) on the front panel. A block diagram of the frequency counter function is shown in figure 5-9.
FRNT PNL INTER
A12
ATTEN
FRE
CNT
°R^-
UT
INP
ACE
.1
AM^———————"L<
^
1
r-———1
J
CONTROL
Figure 5-9.
F
OFFSET
-59——-
65
IF/BFO
T-
Frequency
'
»
ROCESSOR I/O
SEL
SW
Counter
Block
FREQ
CNTR
Diagram
PIA
——
A9
PROCESSOR
PROCES
SOR
852™
5-67. The external input signal is routed to the Front Panel Interface module (A12). A range Attenuator on the
Interface module provides variable sensitivity settings according to the vertical range switch setting on the
front panel. An Amplifier following the range Attenuator amplifies and limits the signal amplitude for the
frequency counter input.
5-68. A Select Switch on the Processor I/O module (A7) routes the desired signal to the Frequency Counter
circuitry. The signal selected is controlled by the processor and is determined by the operating mode of the
system.
5-69. A 16-bit gated accumulator is used to determine the input frequency. Gate times from 1 msec to 10 sec
are automatically selected by the processor to give the maximum possible resolution. The gate times are
derived from the RF Synthesizer REFERENCE FREQUENCIES and thus are as accurate as the system time
base.
5-70. The 16-bit Frequency Counter output is transferred directly to the processor bus through a Peripheral
Interface Adapter (PIA). The processor in turn adjusts the data for the gate time used and then processes the
information to obtain the required frequency display.
5-71. Digital Voltmeter (DVM)
5-72. The processor through the DVM circuitry has access to voltage information ata large number of points
throughout the system. From this information the processor is able to determine and display parameters such •
as; output power level, modulation level, input power level and the like. In addition an external voltage applied
to the DVM input jack on the front panel can be measured and displayed for external voltage measurements. A
block diagram of the DVM function is shown in figure 5-10.
5-17
Figure 5-10. Digital Voltmeter (DVM) Block Diagram
5-73. Switching for the DVM input is contained on the Scope/DVM Control module (A3). One of ten internal
measurement points may be selected for measurement. The switching action is controlled by the processor
and is performed as required to obtain the information on the CRT. To keep the CRT information current, each
of the required measurements are made in sequence at an approximate rate of thirty per second. The net effect
is a multiplexing of the voltage information to the processor.
.5-74. Two modulation signals (MOD CAL AUDIO and CARRIER + MOD LVL) and a demodulated signal
(DEMOD CAL AUDIO) are made available to the peak detectors. Positive and negative peak determination of
the selected signal enables the processor to determine the level of modulation.
5-75. A Lowpass Filter (LPFL) removes the DC component from the CARRIER + MOD LVL signal so that the
generate RF output level can be determined. Refer to paragraph 5-30.
5-18
5-76. The RF INPUT POWER and OVERTEMP signal lines from the RF Input module provide the processor
inputs for the internal wattmeter. (Paragraph 5-38). External wattmeter element inputs (EXT FWD PWR and
EXT RFL PWR) from the front panel jack provide the information for the external wattmeter display.
5-77. A signal line from the DC input jack on the rear panel (BATT VOLT) is brought to the processor for
battery voltage determination. The voltage is attenuated by a factor of 10 to stay with the 10 volt maximum
input to the select switch. The processor uses the battery voltage measurement to warn the operator when the
battery is near it's discharged state.
5-78. Sinad determination utilizes the two remaining inputs to the select switch. For a discussion on the sinad
function see para 5-96.
5-79. The selected internal measurement signal is then passed through a range attenuator. Signals from the
Select Switch have a 0 to +10 volt range while the DVM input has a 1 volt maximum input requirement. The
processor automatically determines and sets the correct range on the attenuator so that the input level to the
DVM is maintained at less than 1 volt. For levels from the select switch less than 1 volt, the attenuator is ranged
to the unity gain position for maximum measurement resolution.
5-80. A select switch following the internal range attenuator gates either the internal measurement points or
the external input to the DVM circuitry. External DVM inputs are applied through the front panel jack to the
Front Panel Interface module (A12). On the Interface module, a processor controlled switch selects between a
direct coupled or a capacitively coupled path for DC and AC measurements respectively. A range attenuator
follows the AC/DC switch to provide processor controlled autoranging over a four decade range. Input
voltages from 1 millivolt to 300 volt can be handled through the DVM Input.
5-81. For DC measurements a lowpass filter (LPFL) removes AC signal components. The filter provides
approximately 25 dB rejection at 50 Hz so that accurate DC measurements can be made with superimposed AC
line ripple. When the AC measurement mode is selected the LPFL is reprogrammed for less than 0.5 dB
rejection at 10 kHz.
5-82. Positive and negative DVM input levels are full-wave rectified by the Absolute Value circuit on the
Processor I/O module (A7). The outputs of the Absolute Value circuit provide a positive voltage level equal to
the magnitude of the input voltage and a SIGN BIT indicating the polarity of the input signal. For AC
measurements a lowpass filter is switched into the Absolute Value circuit to filter the rectified AC input for it's
average level. The processor then multiplies by 1.11 to obtain the RMS value.
5-83. An analog to digital converter (A/D) converts the magnitude voltage level into a 10-bit digital word. This
digital word when combined with the SIGN BIT is a binary representation of the input voltage level. The
peripheral interface adapter transfers the information to the processor.
5-84. Oscilloscope
5-85. Three basic functions are provided for by the system oscilloscope. The alphanumeric and modulation
displays provide operating mode and control information for the system. The external oscilloscope feature
augments the total system as a general purpose test instrument. A block diagram of the oscilloscope function
is shown in figure 5-11.
5-86. Drive signals for the CRT are provided by circuits on the Scope Amplifier module (A2). Horizontal and
vertical signals are amplified by their respective amplifiers from 0.5 volt/division input levels to the levels
required on the deflection plates. A Z-Axis Modulator circuit controls the cathode to grid bias voltage on the
CRT to effect intensity control.
5-19
Figure 5-11. Oscilloscope Block Diagram
5-87. The horizontal amplifier input is selected between external and internal scope functions. External
functions, Time base Generator or external horizontal input, are switched to a sumation amp where the
HORIZONTAL POSITION signal from the front panel is added. The resulting DC offset positions the display
horizontally on the CRT.
5-88. Six decade sweep ranges from 1u sec to 100 msec per division are provided by the Time base
Generator. Control of the Time base Generator is from the front panel horizontal switch through the processor.
5-89. Front panel external horizontal inputs are applied to the top of the horizontal vernier gain
potentiometer. The wiper of the gain potentiometer is the EXTERNAL HORIZONTAL input signal to the
5-20
preamp on. the Front Panel Interface module (A12). The preampprovittes (he required horizontal input
sensitivity and buffers the signal to the select switch on the Scope Amplifier module.
5-90. Internal horizontal signals, Sweep Generator and Character Sweep outputs, are selected on the
Scope/DVM Control module (A3). The Sweep Generator provides a sawtooth waveform to the RF Synthesizer
module for the sweep generator and spectrum analyzer functions. The sweep signal to the CRT horizontal
input causes the scope sweep to be synchronous with the synthesizer sweep for the spectrum and swept filter
response displays.
5-91. The Horizontal Character Sweep generator output is a sawtooth waveform that provides the horizontal
sweep for the raster scan character display.
5-92. One of four possible vertical signal sources are switched to the Vertical Amplifier input by a Select
Switch on the Scope/DVM Control module. The 455 kHz IF and SPECTRUM ANALYZER signals from the
Receiver Module provide the IF envelope and spectrum analyzer displays respectively. The Vertical Character
Sweep generator gives the vertical sweep for the raster scan character display. The remaining input is the path
for external vertical or modulation scope vertical inputs from the Front Panel Interface module.
5-93. A vertical preamplifier on the Interface module gives a vertical sensitivity of 10 millivolt per division and
provides positioning and vernier gain capability for its input. The amplifier is proceeded by a four decade range
attenuator which is controlled from the front panel vertical switch through the processor. The attenuator
provides external vertical input sensitivities from 0.01 to 1.0 volt per division and modulation scope sensitivities
from 0.25 to 25 kHz per division.
5-94. A Select Switch ahead of the Attenuator selects between the external vertical input or the modulation
scope inputs. The External Vertical input path is further selected between AC and DC coupling before
becoming the vertical input jack on the front panel. The modulation scope signal path is switched to one of
three possible sources on the Scope/DVM Control module. Demodulation signals from the Receiver are
selected via the DEMOD CAL AUDIO path, and frequency and amplitude modulation signals via the MOD CAL
AUDIO and CARRIER + MOD LVL signal paths respectively. The Audio Synthesizer module provides the MOD
CAL AUDIO signal while the RF Input module gives the CARRIER + MOD LVL signal.
5-95. A Z-Axis Select circuit on the Scope/DVM Control module gates either the CHARACTER GEN signal
for character displays or the retrace blanking signal from the Time Base Generator for scope displays to the ZAxis Modulator on the Scope Amplifier module.
5-96. Sinad Meter
5-97. Sinad, which is defined as the ratio of noise plus distortion to signal plus noise plus distortion, is a
measurement of the audio quality at a receiver output. Measurement of the Sinad is implemented with a 1 kHz
notch filter. For a receiver receiving a 1 kHz tone the audio output is applied to the 1 kHz notch filter. Sinad is
then the ratio of the signal power at the output of the notch filter to the signal power at the input of the notch
filter. A block diagram of the Sinad Meter is shown in figure 5-12.
5-98. The Sinad Input from the front panel is AC coupled to the range Attenuator on the Front Panel Interface
module (A12). Processor control on the Attenuator allows a wide range of input levels to be automatically
handled. The output of the Attenuator is routed to the 1 kHz Notch Filter on the Scope/DVM Control module
(A3). Detectors, comprised of fullwave rectifiers and filters, on the input and output of the notch filter
determine the respective power levels.'The DC outputs of the detectors are read by processor through the
DVM. The processor determies the ratio between the two readings and displays the Sinad.
,
5-21
A12 FRNT PN
INTERFACE
L
A3 SCOP
E/DVM CONTRC
)L
SINAD IN
3
———(——
A9
PROCESSOR
6
3
CONT
ROL
1 KHz
NOTCH FIL
DET
DET
——»• SINAD OUT
——- SINAD IN
8521-38
Figure 5-12. Sinad Meter Block Diagram
5-99. ALIGNMENT PROCEDURE
5-100. Introduction
5-101. This section provides a basic (para 5-105) and an extended (para 5-118) alignment procedure.
The basic procedure requires only the use of a calibrated oscilloscope. It is expected that the basic alignment
be performed whenever service work is performed. The extended alignment procedure requires module
extenders and a calibrated digital voltmeter in addition to the oscilloscope. The extended procedure should be
performed as required after servicing the system. All adjustments not covered in this procedure are to be
performed on suitable module test fixtures only.
5-102. Test Equipment Required
5-103. The test equipment or its equivalent listed in table 5-3 is required for the basic procedure. The
additional equipment required for the extended procedure is listed in table 5-4.
Table 5-3. Basic Test Equipment Required
Description
'Oscilloscope
Model
Motorola R1004A
Test Point Shorting Jumper
Nonmetallic Alignment Tool
*A R2001A is a suitable substitute
5-22
Table 5-4. Extended Test Equipment Required
Description Model
'Oscilloscope
'Digital Voltmeter
*RF Signal Generator
•Modulation Meter
Receiver Test Cover
Extender Card Set
"A R2001A is suitable for use in place of these separate equipments.
5-104. Preparation for Alignment
1. All alignments to be performed at normal ambient temperature.
2. Remove the top cover of the unit to be aligned.
3. Apply power to the unit to be aligned and allow a warmup time of 15 minutes prior to alignment.
5-105. Basic Alignment Procedure
5-106. CRT Astigmatism and Geometry
1. Select the Monitor Function and the Gen/Mon Mtr Display on the R2001 A. Set the Intensity Control for
a medium intense display.
2. While using the Focus Control to maintain a focused display at the center of the CRT, adjust the
Astigmatism and Geometry potentiometers (Figure 5-13) for the best focus at the outer edges of the
CRT while minimizing the pincushion and barrel distortion of the display. The two adjustments are
interactive so that repeated small adjustments alternated between the two potentiometers will be
required to obtain the best display.
Motorola R1004A
Motorola R1001A
Motorola R1201A
Boonton 82AD
Motorola 15-P01324V001
Motorola 67-P01322V001
Figure
5-13.
Scope Amplifier Alignment Points
elS?
5-107. CRT intensity Bias
1. Select the Scope DC Display and the Ext Horiz. Input mod» Set the Intensity Control fully counter
clockwise.
CAUTION
Do not let a dot stay in one place on the CRT screen for more than 30 seconds as a
permanent burn in the phosphor will occur.
2. Adjust the Intensity Bias potentiometer (Figure 5-13) until a dot appears on the screen. (The Vertical
and Horizontal Position Control on the front panel may have to be used to bring the dot on to the
screen.) Then back off the Intensity Bias potentiometer until the dot just disappears.
5-108. CRT Intensity Balance
1. Select the Scope DC Display and the 1 mSec/Div Horizontal Sweep rate on the R2001A. Set the
Horizontal Timebase Veriner to the Cal position and adjust the Intensity Control for a barely visible
horizontal line on the CRT.
2. Adjust the Intensity Balance potentiometer (Figure 5-13) for uniform intensity of the horizontal trace
from left to right. The Balance potentiometer affects the intensity on the left side of the trace.
5-109. CRT Horizontal Centering
1. Select the Gen/Mon Mtr Display on the R2001A. Adjust the Intensity Control for a comfortable viewing
brightness.
2. With the Test Point Shorting Jumper connect TP1 of the Scope Amplifier Board (Figure 5-13) to
chassis ground.
3. Adj ust the Horizontal Position Potentiometer (Figure 5-13) so that the vertical trace on the CRT screen
passes through the graticule center point.
4. Remove the jumper from TP1.
5-110. CRT Vertical Centering
1. Select the Gen/Mon Mtr Display on the R2001A. Adjust the Intensity Control for comfortable viewing
brightness.
2. With the Test Point Shorting Jumper connect TP4 of the Scope Amplifier Board (Figure 5-13) to
chassis ground.
3. Adjust the Vertical Position Potentiometer (Figure 5-13) so that the horizontal trace on the CRT screen
passes through the graticule center point.
5-111. CRT Trace Rotation
1. Select the Gen/Mon Mtr Display on the R2001A. Adjust the Intensity Control for a comfortable viewing
brightness.
2. Adjust the Trace Rotation Potentiometer for a properly rotated CRT display.
5-24
5-112. CRT Horizontal Gain
1. Connect the Mod Out Jack to the Ext Horiz Jack on the R2001A front panel.
2. Set the R2001 A for the Generate FM Function and the Scope DC Display. Set the Horiz Control for Ext
Horiz input. Turn the Code Synthesizer off/the Ext Level offhand the 1 kHz Level up about half way.
3. Connect an oscilloscope with a calibrated vertical input-to TP1 on the Scope Amplifier Board.
(Figure 5-13).
4. Using the front panel Horizontal Vernier Control adjust for a 3 V p-p amplitude on the sinewave at TP1.
5. With 3V p-p at TP1 adjust the Horizontal Gain Potentiometer (Figure 5-13) for a horizontal trace 6 cm
long on the CRT. (Use the front panel controls to position the trace at a convenient place near the
center of the CRT).
5-113. CRT Vertical Gain
1. Connect the Mod Out Jack to the Vert Input Jack on the R2001A front panel.
2. Set the R2001A for the Generate FM Function and the Scope DC Display. Set the Horiz Control for
1 mSec/Div sweep rate and the Horizontal Vernier to the Cal position. Set the Vert Control for 1 V/Div
input sensitivity and the Vertical Vernier to the Cal position.
3. Turn the Code Synthesizer off, the Ext Level off and the 1 kHz Level up about half way.
4. Connect an oscilloscope with a calibrated vertical input to TP4 on the Scope Amplifier Board. (Figure
5-13).
5. Using the front panel 1 kHz Level Control adjust for a 3V p-p amplitude on the sinewave at TP4.
6. With 3V p-p at TP4 adjust the Vertical Gain Potentiometer (Figure 5-13) for a 6 cm p-p sinewave on the
CRT. (use the front panel Position Controls to center the waveform on the CRT).
5-114. Vertical Input Gain
1. Set the R2001 A for the Generate FM Function and the Scope DC Display. Set the Horiz Control for 1 m
Sec/Div sweep rate and the Horizontal Vernier to the Cal position. Set the Vert Control for 1 V/Div input
sensitivity and the Vertical Vernier to the Cal position.
2. Connect an oscilloscope with a calibrated vertical input to the Mod Out Jack on the front panel.
3. Turn the Code Synthesizer off, the Ext Level off and adjust the 1 kHz Level Control for a 6 V p-p
sinewave on the attached oscilloscope.
4. Disconnect the oscilloscope from the Mod Out Jack and connect the Mod Out Jack to the Vert Input
Jack on the R2001A.
5. Adjust the Input Vertical Gain Potentiometer on the Front Panel Interface Board (Figure 5-14) for a 6
cm p-p sinewave on the CRT. (Use the front panel Position Controls to center the waveform on the
CRT.)
5-25
Figure 5-14. Front Panel Interface Alignment Points
5-115. DVM Zero
1. Select the DVM Display and the DC Mode on the R2001A.
2. Short the center conductor of the DVM Input Jack to ground.
3. Adjust the DVM Zero (Coarse) and the DVM Zero (Fine) Potentiometers on the Front Panel Interface
Board (Figure 5-14) for a zero reading on the DVM Display.
5-116. Spectrum Analyzer Centering
1. Select the Spect Analyzer Display on the R2001 A. Set the Dispersion Control on the front panel to the 1
MHz position, (full counter clockwise) Set the center frequency of the analyzer to 10.0 MHz.
2. Connect the 10 MHz Output on the rear panel to the RF Input on the front panel. Set the RF Step
Attenuator to obtain a convenient spectral display.
3. Adjust the Spectrum Analyzer Centering Potentiometer on the Scope/DVM Control Board (Figure 5-
15) so that the spectral line on the CRT is centered about the center graticule line.
5-117. Horizontal Time Base
1. Select the Tone Memory Display and the Generate FM Function on the R2001 A. Program tone A for
20.0 Hz and Tone B for 2000.0 Hz.
2. Select the Modulation Display. Set the Oscilloscope Controls for 2.5 kHz/Div vertical range, Auto
Trigger, and 10 mSec/Div horizontal sweep range. Set the Horizontal and Vertical Vernier Controls to
their Cal positions. •
3. Set the Code Synthesizer for Continuous, Tone A, and turn up the Code Synth Level to obtain a nearly
full scale sinusoidal waveform on the CRT. Turn the Ext Level and the 1 kHz Level Controls to the off
position.
5-26
PEAK DETECTORS ZERO
NE6ATIVE POSITHE
Figure 5-15. Scbpe/DVM Control Alignment Points
Adjust the Coarse Time Base Calibration Potentiometer on the Scope Amplifier Board (Figure 5-16) so
that one cycle of the displayed waveform occurs in 5 cm along the horizontal axis. Use the Vertical and
Horizontal Position controls to center and to move the waveform so that the 5 cm are measured in the
middle of the screen to avoid nonlinearities near the edge of the CRT.
Figure 5-16. Hor|zon'l»t Time Base Alignment Points
Set the Oscilloscope Horizontal Control for a 100ft Sec/Div sweep rate and select the Tone B output
on'-the Code Synthesizer.
Adjust the Fine Time Base Calibration Capacitor on the Scope Amplifier Board (Figure 5-16) so that
one cycle of the displayed waveform occurs in 5 cm along the horizontal axis, Use the Vertical and
Horizontal Position controls to center and to move the waveform so that the 5 cm are measured in the
middle of the screen to avoid nonlinearities near the edge of the CRT.
5-27
5-118. Extended Alignment Procedure
5-119. DVM
1. Remove the top and bottom covers of the-R2001A.
2. Connect the R2001Atoa primary power source and turn it on. Allow approximatly 15 minutes warm up
before proceeding with the alignment procedure.
3. Short the center conductor of the DVM Input Jack on the front panel to ground. Connect an external
DVM with a floating input between pin 1 and pin 6 of J3 on the bottom side of the motherboard.
4. Adjust the Coarse and Fine DVM Zero potentiometers on the Front Panel Interface board (Figure 5-17)
for a reading of 0 ±0.5 mV on the external DVM.
Figure 5-17. DVM Input Buffer Alignment Points
5. Remove the ground from the DVM Input and connect the DVM Input to TP 12 of the Scope/DVM
Control Board. (Figure 5-18)
Figure 5-18. Scope/DVM Control Test Point Numbering
6. Disconnect the external DVM from pins 1 and 6 of J3 and connect it to TP 12 of the Scope/DVM Control
Board and chassis ground. Note the DVM reading for TP 12.
7. Reconnect the external DVM between pin 1 and pin 6 of J3. The external DVM should show a reading
equal to one-tenth the voltage at TP 12 noted in paragraph 5-119.6 plus or minus 10 mV. If the reading
falls outside this range it will be necessary to physically disconnect the front panel from the chassis in
order to adjust the DVM Input Gain Potentiometer on the Front Panel Interface Card (Figure 5-17).
Adjust the DVM Input gain for a reading on the external DVM equal to one-tenth the voltage noted for
paragraph 5-119.6. Reconnect the front panel to the chassis.
5-28
8. Repeat paragraphs 5-119.3 and 5-119.4.
9. Disconnect the external DVM. With the DVM input jack still shorted adjust the A/D Zero Potentiometer
on the I/O Board (Figure 5-19) for a O.tfVDC'reading on the R2001ACRT display.
CAUTION
Do not use the card extender while aligning the Processor I/O board.
10. Remove the short from the DVM Input and connect the DVM Input to TP 12 of the Scope/DVM Control
Board.
11. Adjust the A/D Gain Potentiometer on the Processor I/O Board (Figure 5-19) for a DVM reading on the
CRT equal to the voltage measured at TP 12 with the external DVM for paragraph 5-119.6.
12. Connect the external DVM to TP11 of the Scope/DVM Control Board and chassis ground. Note the
DVM reading for TP11.
13. Disconnect he external DVM from TP11 and connect the DVM Input Jack on the front panel to TP11 of
the Scope/DVM Control Board.
14. Adjust the A/D Balance Potentiometer on the Processor I/O Board (Figure 5-19) for a DVM reading on
the CRT equal to the voltage measured at TP11 with. the external DVM in step 13.
s ® ® a ° '''^"gj ° ^ i',} t») @ ®^;^
A»DGAIII__, Q I——SIP -J ^ "'- • "
AID BALANCE
;
Figure 5-19. Processor I/O A/D Alignment Points
5-29
5-120. Character Generator
1. Perform the Basic Alignment Procedure of para 5-105.
2. Turn the R2001A off and extend the Scope/DVM Control Board using the 100 pin extender card.
3. Turn the R2001A on and select the Monitor FM Function and the Gen/Mon Mtr Display.
4. Adjust the Horizontal Character Sweep Width Potentiometer on the Scope/DVM Control Board
(Figure 5-20) so that the right-hand edge of the CRT character display is approximately 4.2 graticule
divisions to the right of the graticule center line.
Figure 5-20. Scope/DVM Control Char Sweep and Sinad Alignment Points
5. Adjust the Vertical Character Sweep Width Potentiometer on the Scope/DVM Control Board (FigureS-
20) so that the bottom edge of the CRT display is approximately 3.3 graticule divisions below the
graticule center line.
6. Turn the system power off and reinstall the Scope/DVM Control Board into the R2001A,
5-121. Sinad Notch Filter
1. Turn the R2001A off and extend the Scope/DVM Control Board using the 100 pin extender card.
2. Turn the R2001A on and select the Generate FM Function and the Gen/Mon Mtr Display.
3. Set the Modulation Switch and the Ext. Level Control to their off positions. Set the BW Switch to the
Narrow position and adjust the 1 kHz Level Control for a 20 kHz deviation reading on the CRT display.
4. Connect the Mod Out Jack on the fron panel to the Vert/Sinad/DVM/Counter Input Jack on the front
panel.
5-30
5. AHernatety ad/usl She Iwo SWAD Noich polenf/ome'ters on 8ie Scope/DVW Coniro) Board iF/gare
5-20) for a maximum SINAD reading on the CRT display. A reading greater than 30 dB should be
obtained.
6: Turn the system power off and reinstall the Scope/DVM Control Board into the R2001A.
5-122. Receiver
5-123. AM Detector
1. Perform the basic alignment procedure of para 5-105.
2. Turn the R2001 A off and remove the Receiver Module. Remove the Receiver Module cover and install
the Receiver Test Cover on the module housing. Extend the Receiver module on the Receiver Extender
Card.
3. Turn the R2001 A on and select the Monitor AM Function and the Gen/Mon Mtr Display. Set the monitor
frequency to 250 MHz, the RF Step Attenuator to the 0 dB position, and the BW Switch to the Narrow
position.
4. Connect the external signal generator to the RF In/Out Jack on the front panel. Adjust the external
generator for an output level of approximately -60 dBm and a calibrated 30% AM.
5. Adjust R60 (Marked on the Receiver Test Cover) for a reading of 30% ±5% on the CRT AM display.
5-124. FM Detector
1. Select the Monitor FM Function and the Gen/Mon Mtr Display. Set the monitor frequency to 250 MHz,
the RF Step Attenuator to the 0 dB position, and the BW Switch to the Wide position.
2. Connect the external signal generator to the RF In/Out Jack on the front panel. Adjust the external
generator for a center frequency of 250 MHz at an output level of approximately -30 dBm and a
calibrated 20 kHz FM.
3. Adjust R70 (Marked on the Receiver Test Cover) for a reading of 20 kHz ± 1 kHz on the CRT FM display.
4. Set the BW switch to the Narrow position and reset the FM on the external generator to 3 kHz deviation.
5. Adjust R125 (Marked on the Receiver Test Cover) for a reading of 3 kHz ± 150 Hz on the CRT FM
display.
6. Turn off the FM on the external generator so that a CW signal of a level of approximately -30 dBm is
applied to the R2001A.
7. Connect the Demod Out Jack to the Vert/Sinad/DVM/Counter I nputdaek on the front panel. Select the
DVM Display and the DC DVM Mode on the R2001A. • ..
8. Adjust R68 (Marked on the Receiver Test Qover) for a 0.0 VDC ±100 mVDC reading on the DVM
Display. I
5-31
5-125. Spectrum Analyzer
1. Select the Monitor Function and the Spectrum Analyzer Display on the R2001A. Set the monitor
frequency to 250 MHz, and the RF Step Attenuator to the 40 dB position.
2. Connect the external signal generator to the RF In/Out Jack on the front panel. Adjust the external
generator for a center frequency of 250 MHz and a calibrated output level of -30 dBm with no
modulation.
3. Adjust in succession C2, C83, C88, and C96 (Marked on the Receiver Test Cover) to maximize the
amplitude of the spectral line in the center of the CRT display.
4. Adjust R124, R91, and R100 (Marked on the Receiver Test Cover) to obtain a uniform change in the
spectral amplitude per 10 dB change of the RFStep Attenuator. R124 affects the level of the spectral
component when in the top quarter of the screen, R91 affects levels in the third quarter from the top,
and R100 affects levels in the bottom quarter.
5. Adjust R119 for offset and R121 for gain sothatwiththestepattenuatorintheOdBPositionthepeakof
the spectral line lies on the 30 dB line of the CRT and that successive step increases of the input
attenuator move the spectral amplitude downward in 10 dB increments on the CRT. The accuracy
required for any one step attenuator position is ±3 dB.
6. It will generally be necessary to repeat paragraphs 5-125.4 and 5-125.5 until the best possible accuracy
is obtained.
7. Turn the power off and remove the Receiver Module and the Receiver Extender for the chassis.
Remove the Test Cover from the Receiver Module and replace the module cover. Reinstall the Receiver
Module into the system chassis.
5-126. CHECKOUT PROCEDURE
5-127. Introduction
5-128. This section provides a system checkout procedure. This procedure will help isolate system failures
when used with the troubleshooting information in para 5-146.
5-129. Test Equipment Required
5-130. The test equipment listed in table 5-5 or its equivalent will be required to perform the checkout
procedure.
Table 5-5. Test Equipment
*RF Signal Generator
"RF Power Meter
*SINAD Meter
"Modulation Meter
RF Power Source
*An R2001 A is suitable for use in place of these separate equipments.
5-32
Motorola R-1201A
Motorola S-1339A
Motorola R-1013A
Boonton 82AD
1 watt to 100 watts
5-131. Procedure
5-132. Power On
1. Check that the AC input power select card is in the 120 V postion. Connect the Unit UnderTest (UUT)
to a 120 VAC line source with the front panel power switch off. Verify the presence of an AC indication
on the front panel.
2. , Sat the poww swtah to the Stawltsy PosWw.. Verify ttwown ready wdifcatw te Wi.
3. Set the power switch to the on position. Verify that after a warm-up period a display is visible on the
CRT.
5-133. Keyboard Check
1. Verify that each key has the proper effect by observing the Gen/Mon Mtr Display and entering the
frequency 123.4567 MHz and the PL frequency 890. Check for proper cursor .key operation.
2. Verify that the up and down display keys perform properly and that the LED at each display illuminates.
3. Verify that the up and down function keys perform properly and, that the LED at each function
illuminates. ••' • :
4. Verify that the up and down modulation keys perform properly and that the LED at each modulation
mode illuminates.
5-134. Nonvolatile Memory
1. Select some random combination of Display, Function, and Modulation Modes. Simultaneously
depress both cursor keys and after a five second delay turn the system power OFF. Turn the system
power back ON and verify that the same Display, Function, and Modulation Modes are present.
5-135. Modulation Capability
1. Set the UUT to the Generate FM Mode and select the Gen/Mon Mtr Display. On the Gen/Mon Mtr
Display enter a DPLcodeof 111. Select the Oscilloscope Display and connect the Mod Out Jack to the
Vert In Jack. Set the code synthesizer to the Cont PL/DPL Mode. On the scope verify the presence of a
DPL waveform whose amplitude is variable with the code synthesizer level control.
2. Move the Modulation Switch from CONT to OFF and verify that a short burst of 133 Hz is output before
the output stops. . ,
3. Move the Modulation Switch to the BURST position. Verify that a 133 Hz tone is output as long as the
switch is held in the BURST position.
4. Select the Tone A Continuous Mode. Verify a Tone A output on the scope and at the speaker.
5. Select the Tone Remote Mode. Verify that when the Modulation Switch is moved from OFF to BURST
that a single Tone Remote Access Sequence is generated.
6. Connect a microphone to the Mic Jack- Turn up the ExtLevel Control and verify that speaking into the
mike causes a modulation signat to be output as observed on the scope display.
5-33
5-136. Frequency Counter
1. Set the UUT to the Gen CW Mode with an output frequency of 35 MHz at a level of 0 dBm as displayed
ontheGen/Mon Mtr display. Connect the RF In/Out Jack to the Counter In Jack of the UUT. Select the
Frequency Counter Display and verify a frequency reading of 35 MHz.
2. Set the UUT to the Generate FM Mode and select the Gen/Mon Mtr Display. Turn the Code Synthesizer
and Ext Modulation sources OFF. Select the Narrow Band Mode and adjust the 1 kHz Level Control for
a 5 kHzFM deviation reading. Connect the Mod Out Jack to the Counter Input Jack of UUT. Select the
Frequency Counter Display and verify a nominal frequency reading of 1 kHz.
5-137. DVM
1. Maintaining the same conditions as in paragraph 5-136.2, select the DVM Display and the AC Mode on
the display. Verify a DVM reading of 0.707 vrms ±0.04 vrms.
2. Select the DC Mode and verify a near zero volt DC reading.
5-138, Scope Mode ,
1. Set the UUT to the Scope AC display mode and connect the scope vertical input jack to the Mod Out
Jack. Enable the internal 1 kHz modulation source. Verify the operation of each position of the vertical
input range switch and the vertical vernier gain control.
2. With the same connection as in paragraph 5-138.1, verify the operation of each position of the
Horizontal Control and the Horizontal timebase vernier.
3. With the Horizontal Control set to the External Mode, connect the External Horizontal jack to the Mod
Out jack. Verify a horizontal line whole length is variable with the Horizontal Vernier.
4. Connect the Vert In jack to the Mod Out jack on the UUT. Set the vert and horizontal controls for a
convenient display. Verify that a steady sync is obtained in either the Norm or Auto modes and that the
point of triggering is adjustable with the level control. Remove the input signal and verify no horizontal
sweep in the Norm mode and the presence of a horizontal sweep in the Auto mode.
5-139. SINAD Meter
1. Set the UUT for the Generate FM Function, Narrow Band Mode, and the Tone Memory Display. On the
Tone Table set Tone A for 2000.0 Hz.
2. Select the Gen/Mon Mtr Display and the Tone A Cont Modulation Mode. Turn the Ext Level and the 1
kHz Level Controls OFF. Adjust the Code Synth Lvl Control for an FM deviation of 1.88 kHz as read on
the CRT display.
3. Without disturbing the Code Synth Lvl Control, turn the Code Synthesizer OFF. Turn ON the 1 kHz
Level Control and adjust for an FM deviation of 7.5 kHz on the CRT display.
4. Connect the Mod Out Jack to the SINAD Input Jack on the UUT. Verify a SINAD reading greater than
25 dB.
5. Set the Code Synthesizer to the Continuous Mode and verify a SINAD reading 12 dB ±1 dB.
5-34
5-140. Scan Mode
1. Set the UUTfortheGen/Mon Mtr display. Verify the proper operation of each of the RF Scan, switch
positions.
5-141. Generate Mode
1. Set the UUTforthe Generate FM Mode at 200 MHz'and select the Gen/Mon Mtr display. Verify an RF
level output display on the CRT.
2. Connect the RF millivoltmeter with a 50 ohm termination to the RF In/Out Jack on the UUT. Set the RF
step attenuator to the OdB position and adjust the Variable Level control to obtain a displayed output
level of +13 dBm. Verify that the RF millivoltmeter reads +13 dBm ±2 dBm.
' 3. Repeat paragraph 5-141.2 except at a center frequency of 800 MHz.
4. Increase the RF Step Attenuator setting in 10 dB increments and verify that the displayed RF level
decreases in 10 dB increments.
5. Set the Code Synthesizer Modulation Switch and the Ext Level Control to their respective OFF
positions. Select the Narrow Band mode and adjust the 1 kHz Level Control for a 5 kHz deviation
reading on the CRT display. Verify a 1 kHz tone at the speaker output.
6. Connect the Modulation Meter to the RF In/Out Jack on the UUT. Set the Modulation Meter for a
deviation display of 5 kHz ±250 Hz.
7. Select the Wide Band mode on the UUT and verify that the CRT displays a deviation of 20 kHz. Also
verify that the Modulation Meter shows a peak deviation of 20 kHz ±1 kHz.
8. Select the Modulation Display on the UUT and verify a peak-to-peak modulation display of 40 kHz ±2
kHz.
9. Select the Generate CW Function and verify that no modulation is present on the CRT.
10. Set the UUT for the Generate AM Function, the Gen/Mon Mtr Display, and adjust for an RF output level
of 0 dBm. Adjust the 1 kHz Level Control for a 50% AM reading on the CRT. Verify that the Modulation
Meter reads 50% ±10% AM.
11. Select the Modulation Display and verify a low distortion 1 kHz sinewave.
12. Set the UUT for the Generate SSB/DSBSC Function and verify a low distortion 1 kHz sinewave on the
CRT.
13. Set the UUT for the Generate SWP 1-10 MHz Function and the Scope DC Display. Verify a horizontal
trace and a center frequency display on the CRT.
14. Set the UUT for the Generate SWP 0.01 - 1 MHz Function and verify the same results as paragraph
5-141.13.
5-35
5-142. Power Monitor Mode
1. Set the UUT to the Power Monitor Mode. Set the RF Step Attenuator to the 30 dB position, and select
the Gen/Mon Mtr Display. Connect the RF power source to the RF In/Out Jack. Key the power source
and verify a correct power reading on the CRT display. Unkey the power source.
2. Set the UUT to the Monitor Function and verify that the RF Step Attenuator is in the 30 dB position. Key
the RF power source and verify the presence of an audible alarm and a warning display on the CRT.
Unkey the power source.
5-143, Monitor Mode
1. Set the UUT to the Monitor FM Function. Set the Squelch Control to the OFF position and verify the
presence of a Sig Lvl indication and noise at the speaker. Turn the Squelch Control full on and verify
the absence of a Sig Lvl indication and noise at the speaker.
2. Repeat paragraph 5-143.1 except for the AM Function.
3. Repeat paragraph 5-143.1 except for the SSB/DSBSC Function and enable the BFO. After the test turn
the BFO off.
4. Select the Narrow Band FM Monitor Function at 300 MHz and set the RF Step Attenuator to the OdB
position. Connect the RF Signal Generator to the RF In/Out Jack and the SINAD Meter to the Demod
Out Jack. Set the RF Signal Generator for a center frequency of 300 MHz and for 3 kHz FM at a 1 kHz
rate. Adjust the RF output level from the Signal Generator for a 10 dB reading on the SINAD Meter.
Verify that the Signal Generator's level is less than -103 dBm (1.5 yUVrms).
5. Calibrate the RF Signal Generator for 3 kHz FM at 1 kHz rate using the Modulation Meter. Set the
Generator for a nominal output level of-60 dBm and connect it to the RF In/Out Jack of the UUT. Select
the Gen/Mon Mtr Display and verify a monitor deviation reading of 3 kHz ±150 Hz.
6. Calibrate the RFSignal Generatorfor50 kHz FM at a 1 kHz rate. SelecttheWide Band Modeon the UUT
and verify a reading of 50 kHz ±2.5 kHz on the CRT deviation display.
7. Calibrate the RF Signal Generator for 30% AM at a 1 kHz rate. Set the Generator for a nominal output
level of-60 dBm and connect it to the RF In/Out Jack of the UUT. Select the Monitor AM Function and
the Narrow Band Mode. Verify a monitor AM reading of 30% ±5%.
8. Monitor the % AM Displayed on the CRT while increasing the RF level out of the Signal Generator.
Verify that the IF Overload Warning occurs before the displayed AM exceeds a reading of 30% ±5%.
9. Select the Modulation Display on the UUT and verify the presence of the received modulation signal.
10. Select the Gen/Mon Mtr Display and the Wide Band Mode on the UUT. Vary the center frequency on
either the UUT or the Signal Generator and verify that the Frequency Error Display properly represents
the difference between the UUT's Center frequency and the Signal Generator's center frequency.
11. Select the IF Display on the UUT and verify the presence of an IF envelope on the CRT.
5-36
5-144. Spectrum Analyzer
1. Set the UUT for the Monitor Function of 300 MHz the Spectrum Analyzer Display, and 0 dB input
attenuation. Set at 300 MHz. Connect the Signal Generator to the RF I n/Out Jack on the UUT. Verify a
spectral amplitude of -30 dBm ±5 dB on the CRT display. Increase the RF Step Attenuator in 10 dB
increments verifying that the spectral amplitude decreases by 10 dB ±3 dB with each step.
2. Verify the operation of the Dispersion Control.
5-145. Duplex Generator-
1. Select the Duplex Generator Display and the monitor Function at a frequency oflOOMHz.Enablethe
45 MHz offset frequency. For an Image Low switch position verify that a displayed duplex frequency of
55 MHz can be obtained. Set the Image Switch to the HIGH position and verify a duplex frequency
display of 145 MHz.
2. Enable the 0- 10 MHz offset frequency and verify that displayed duplex frequencies from 100 MHz to
110 MHz can be obtained.
3. Set the UUT to the Generate Function with the Duplex Generator Display. With the Code Synthesizer
and the External Modulation sources OFF, adjust the 1 kHz Level Control for a 20 kHz FM deviation
read ing on the CRT. Select the Monitor Function and adjust the offset frequency for a duplex output of
100 MHz. Connect the Duplex Output Jack to the RF In/Out Jack and verify a 20 kHz ±1 kHz FM
deviation reading on the CRT.
5-146. System Troubleshooting
5-147. A troubleshooting procedure is outlined in Table 5-6. Because of the complexity of the system the
table covers only the major failures and provides only a guide to the most probable failed module. When using
the table it is important to use the checkout procedure at paragraph 5-126 to determine the fault. The
troubleshooting table assumes that all tests prior to the failure point have been successfully completed and
thus the applicable circuits are okay.
5-148. A list of the system test points and their functions are provided in Table 5-7. Test points are identified
on the block diagrams for the Theory of Operation discussion of paragraph 5-16 and for the Module
Descriptions to aid in troubleshooting.
Table 5-6. System Troubleshooting
Test Paragraph Fault Troubleshooting Procedure
5-132
5-132
No AC indication
No Oven Ready indication
1. Check AC linecord and line fuse.
2. If system powers up normally when on,
Replace AC LED.
1. Check for approximately +15 VDC at E13 of
the A13 module. If not present replace the
Low Voltage Power Supply (A1).
2. Check E11 of A13 for +9 VDC and E12 for ap-
proximately +7.5 VDC. IfEU is okay and E12
is 0 VDC, replace the LED. If the +9 VDC is not
present on E11 replace A13.
5-37
Table 5-6. System Troubleshooting (Cont)
Test Paragraph Fault Troubleshooting Procedure
5-132
5-132
System won't turn on
System turns on, but no display
on the CRT for any display
mode
1. Disconnect the high voltage supply from the
low voltage supply at A10P1. Check for
+7.9 VDC at pin 1 of J2 on the low voltage
supply and for+12 VDC at pin 2. If either voltage is not present replace the low voltage
supply (A1).
2. Reconnect the low voltage/high voltage interface and check for a nominal +9 VDC at C15
on the high voltage supply. (C15 isafeedthru
cap on the high voltage supply and can be
reached from the top side just beyond the
CRT socket.)
CAUTION
There is 110V on the rear panel connector even
when the power switch is turned off.
If 9 volts is not present replace the high
voltage supply (A1).
3. If items 1 and 2 check okay replace the low
voltage supply (A1).
1. Check for presence of high voltage by disconnecting the CRT anode lead and arcing
it to the chassis. If no arc, replace the high
voltage supply.
2. If the high voltage supply is okay, replace the
CRT.
5-133
5-133
5-134
5-135
More than one key is inoperative or has the wrong effect
Only one key is inoperative
Any part of the nonvolatile
memory fails to remember
No DPL (modulation) signal on
CRT
5-38
1. Replace the Processor Module (A9).
1. Replace the defective key switch.
1. Replace the Processor module (A9).
1. Check TP1 of the Audio Synthesizer for the
presence of the DPL signal. If not present
replace the Audio Synthesizer module.
2. Check for the DPL signal on pin 64 of the
Audio Synthesizer. If not present replace the
IEEE Interface module (A8), or check for the
presence of the jumpers on J8 for the standard
unit.
Table 5-6. System Troubleshooting (Cont)
Fault Troubleshooting Procedure
3. Check for the DPL signal at TP6 of the Audio
Synthesizer. If not present replace the Audio
Synthesizer (A6).
4. Check for the DPL signal at TP4 of the Scope
Amplifier module (A2). If not present replace
the Scope/DVM control module (A3).
5. If signal switching is okay tolhe Scope AmpI ifier module proceed to the scope trouble-:
shooting information.
No external modulation on the
CRT
Frequency Counter inoperative
DVM AC mode is inoperative
1. Check for modulation signal at TP7 of the,
Audio Synthesizer module (A6). If not present
replace the Audio Synthesizer module.
2. Check for the modulation signal on pin 66 of
the Audio Synthesizer. If not present replace
the IEEE Interface module (A8), or check
for the presence of the modulation jumpers
on J8 for the standard unit.
3. Continue troubleshooting at step 3 of the "no ;
DPL signal on the CRT".
1. Check for presence of a 1 kHz signal at TP9 of'
the Audio Synthesizer (A6). If not present
check for the 10 MHz signal from the Frequency Standard module (A13) to the RF
Synthesizer (A5). If present replace the RF
Synthesizer. If not present replace the Frequency Standard module.
2. If the 1 kHz signal is present check for the
presence of the signal to be counted at pins
61 and 63 of the Processor I/O module (A7).
If not present replace the Front Panel Inter-
face Module (A12).
3. If signal is okay up to the Processor I/O
module replace the Processor I/O module.
1. Check for DVM signal at pin 22 of Processor
Interface module (A12). If not present replace
the Front Panel Interface module.
2. Check for short bursts of the DVM AC signal
at TP8 of the Scope/DVM Control module
(A3).
5-39
Table 5-6. System Troubleshooting (Cont)
Test Paragraph Fault Troubleshooting Procedure
NOTE
The DVM AC signal from the external input is
multiplexed with the other signals to be measured. Thus only short bursts of the input signal
will be observed at TP8.
If signal is not present at TP8 replace the
Scope/DVM Control module.
3. If the signal is okay to TP8 of A3, replace the
Processor I/O module (A7).
5-137
5-138
5-138
5-138
DVM DC mode is inoperative
No horizontal sweep
No vertical display
No vertical sync
1. Check for the DC input level attenuated by
factors of 10 to less than 1 volt at pin 22 of the
Front Panel Interface module (A12). If not
present or if greater than 1 volt, replace the'
Front Panel Interface module.
2. lfthesignalisokayfromA12,switchtotheAC
mode and apply an AC signal to the DVM input. Proceed from step 2 under DVM AC
mode inoperative.
1. Check for a voltage level between -2.0 VDC
and +2.0 VDC at TP4 of the Scope Amplifier
module (A2). Ifthevoltagecannot be brought
within range with either the vertical range
attenuator or the vertical position control
replace the Front Panel Interface module
(A12).
2. If the voltage at TP4 is okay replace the Scope
Amplifier module (A2).
1. Check for the input signal at TP4 of the Scope
Amplifier module (A2). If not present replace
the Front Panel Interface module (A12).
2. If signal is okay at TP4 replace the Scope
Amplifier module.
1. Check for the presence of sync pulses at pin
12 of the Scope/DVM Control module (A3)
and for a nominal zero volt sync present level
at pin 76. Ifeithersignal is not present replace
the Scope/DVM Control module.
5-40
Table 5-6. System Troubleshooting (Cont)
Fault Troubleshooting Procedure.
2. If sync pulse and the syn present lines are
okay replace the Scope Amplifier module
(A2).
SINAD meter inoperative
No generate output
No Frequency Modulation
Internal wattmeter in error
T^o monitor function
1. If the DVM mode checks okay replace the
Scope/DVM Control module (A3).
2. If the DVM mode does not check okay go to
the troubleshooting list for DVM AC
inoperative.
1. Remove the RF cable between the RF Synthesizer (AS) and theRF Input module (A11).
Check for a nominal -10 dBm level at the
Synthesizer output. If no output replace the
RF Synthesizer.
2. If the Synthesizer output is okay replace the
RF Input module.
1. Check for modulation signal at pin 56 of the
RF Synthesizer (A5). If the signal is okay
replace the RF Synthesizer.
2. If the modulation signal is not present proceed to the troubleshooting list under "no
DPL (modulation) signal on CRT".
1. Replace RP input module (A11).
1. Apply a 10.7MHz modulated carrier td theRF
input. Check for normal receiver operation
except reduced sensitivity. If receiver is not
working replace the Receiver module (A4).
Monitor frequency error display
is missing
Monitor frequency error is in
error
5-41
2. If the receiver checks okay and the generate
function is okay, replace the RF Input module
(A11).
1. Go to the troubleshooting list under "fre-
quency counter inoperative".
1. Check for presence of IF signal at pin 91 of the
Scope/DVM Control module (A3). If not
present replace the Receiver module (A4).
2. If the IF signal is present replace the Scope/
DVM Control module.
Table 5-6. System Troubleshooting (Cont)
Test Paragraph Fault Troubleshooting Procedure
5-144
No spectrum analyzer sweep
1.. Check pin 6 of the RF Synthesizer module
(A5) for a 50 Hz square wave. If not present
replace the RF Synthesizer module.
2. If 50 Hz signal is present replace the Scope/ ,
DVM Control module (A3). '
5-144
5-145
Spectrum display is in error
No duplex output
1. Replace the Receiver module (A4).
1. Replace the RF Input module (A11).
Table 5-7. Test Point Identification
All test points are located near the top edge of the card and counted from left to right when facing the;
component side of the card.
Module
A2
Scope Amplifier
A3
Scope/DVM
Control
A6
Audio Synthesizer
!
Test Point No.
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
Signal Description
Horizontal Amp Input
Horizontal Deflection Plate
Horizontal Deflection Plate
Vertical Amp Input
Focus Tracking Voltage
Vertical Deflection Plate
Vertical Deflection Plate
Z-Axis Modulator Output
Intensity Tracking Voltage
Time Base Output
Vertical Character Sync
Negative Peak Detector Output
Gen Carrier Plus AM Level
Positive Peak Detector Output
Demodulated Calibrated Audio
Not Used
Ground
Multiplexed A/D Signal
Character Generator Reset
Ground
-8VDC
+8
VDC
Synth/DPL Audio
DPL Clock
Unfiltered DPL
5-42
Table 5-7. Test Point Identification
Module
A7
Processor I/O
A9
Processor
A12
Front Panel
Interface
Test Point No.
4
5
6
7
8
9
1
2
3
4
5
1
2
3
4
5
6
7
8
1
Signal Description
Synth. D/A Output
Ground
Composite Modulation Audio
Composite External Mod. Audio
Synthesizer Clock 104, 857.6 Hz
1 kHz Modulation Source
A/D Input
Unfiltered 10.245 MHz T.V.
DVM/Freq. Counter Select
Frequency Counter Input
Not Used
Ground
Character Clock
Character Row Clock
Character Dot Clock
Enable
Character Line Clock
R/W Select
Char. Gen/Processor Select
Attenuator Buffer Output
5-43
SECTION 6
SYSTEM INTERCONNECT AND PARTS LISTS
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Figure 6-2. Motherboard Assembly Parts Locator
RTL-4060A
Find
No.
001
002
003
004
005
006
007
008
009
010
011
012
013
014
015
016
017
021
028
029
034
035
040
041
042
043
044
047
048
049
050
051
052
053
054
057
Qty
Req.
10
22
4
22
22
10
10
AR
AR
AR
AR
4
26
60
60
12
AR
AR
15
2
28
12
3
12
10
2
.
Part Number
15·80335A44
15·80335A69
55-80335A58
55-80335A
73
55
-80335A
72
33-14232A09
1 5-80335A59
01
-P002
49N002
55
·803
35A89
M
$35206-2
13
03-80335A97
M
$51957-
27
M$35338-136
M$15795-806
04-80335A99
M$35336-1368
55-847016
MS24693-C49
M$35338-40
NAS620C4L
58-84300A98
30-P04
1 47T001
11
·14167A10
SN
63WAP3
11
0 643
08A
11
01·80304A57
27·80335A01
64
·P00260N001
MS352()6.226
66602·1
M
$3
5206·21 4
M$27 183
·3
MS35338· 40
MS2469
3·524
SN63WRMAP3
50083205803
26-80335A54
42-P00481N001
26-P06847R001
3-134169
3-1341
~
346-8-7-7
42-14060A01
ATL
-4060A
206903
·1
36·80335A88
75-60335A51
07-80335A92
07·80335A93
07-60335A94
75-80335A60
MS35206-228
MS51957
-278
MS35206-215
MS2716
3-5
MS15795-805B
MS35336-136B
M$35338-41
MS35649-242
64·P00301 N001
Nomenclature
COVE
R, SYSTEM,
COVER,
SYS
TEM
HANDLE, BAIL
HANDLE.BAIL
HANDLE,MOLDED
IDENTIFICATIO N PLATE
COVER.
HAND
FRONT COV
HINGE
SC
SCAEW ,
SCREW
WASHER
WASHER
WASHER.FL
WASHER,LOCK
STRIK E.CAT
SCREW 8-32X.438
WASHEA,LOCK
WASHEA,FLAT N0 .4
CONN,ADAPTEA
CA
WIRE
INK
SOLDER
P
FRONT
CHASSIS,
PLATE
S
CO
SCA
WASHEA,FLAT
WASHEA,LOCK
SCA
WIRE
SOL
SPEAKER
SHIELD
BRACKET
MAGNET
SC
SC
FUSEHOLDEA
CLAMP
MOTHERBOARD
SE
KNOB,SPECIAL
I
FOOT
F
FOOT,
FOOT.PLASTIC
SC
SC
SCREW
WA
WASHEA.FLAT
WA
WASHER.LOCK
NUT,HEX
PLATE.
LE
ER
ASSY
REW 4-40X1/ 4
PH
BLACK 6·32X.312
AT
BLA
BLACK N0.6
CH
BLE ASSEMBLY,IEEE
AIN
T
PANE
L ASS
SYSTEM
MOUNTING
CREW
,PH 6-32X.250
NTA
CT.PIN
EW,
PH
EW,
FLHD
DER
, C
AT
,CRT SHIELD
IC SHIELD
AEW,THD
FOAM
AEW,THO
FOAMIN
ASSEMBLY, CONNE MALE· SC
ALING
CAP
SOLATOR, CRT.BOTTOM
: REAR C HASSIS
OO
T.BATTERY
BATTERY HOLDER,L
REW
REW,PH
BLACK
SHER,FL
AT
BLA
SHER
.LOCK
BLA
THREADED
TOP
CK N0.6
EMBLY
: PWR S A10/A
ING
G
ASSE
MBLY
HOL
DER
CK
CK
Part Value
6-
32X51
N0
.6
N0
.6
N0.4
N·BNC
24
PIN
26
WHITE
SHADOW
4-40X.312
N0
.4
N0
.4
6·32X1/ 4
22W
6·32X.250
.
6·32X.375
6·32X.312
4
·40X
N0
.6
N0
.6
N0
.6
N0 .6
4·40
11
HT
.375
16
BRONZE
AEWLOCK
Find
No.
058
059
060
061
062
063
066
068
069
070
071
072
073
074
075
076
077
078
079
080
081
082
083
084
085
086
A
A 002
A 003
A 004
A 005
A006
A 007
A 008
A009
A 015
A 010
A011
A 012
A 013
F
001
F 002
F 003
J 002
J011
J 014
J 015
J 016
T
001
v
001
ASSEMBLY PARTS LIST
Qty.
Req.
AR
AR
AR
AR
AR
AR
AR
AR
AR
AR
2
001
Part No. Nomenclature Part Value
30-P06804A001 CABLE
30-P06805A001
30·P06606R001
30·P06607R001
30-P06808A001
30-P06809A001
29-15159A03
S
N63WAP3
M23053/5-103·9
75
·80346A
24
66601-2
MS35489·9
32-P04135T001
MS35206-213
MS35206·
231
9224·A
·140--10A SPACER .
33-14232
A09 IDENTIFICATION
14-P01317V001 INSULATOR
RTP
·HX>O
A
RTL-400
7A
ATC-4008A
ATL
-1002A
ATC-t001A
RTC-4011A
ATC-4012A
ATC-4013A
ATC
-4Q14A
ATL-4054A
ATP-1001A
AT
C-
1003A
ATL
·404
5A
RTL
-1004A
F03A250V8A
F02A250V5A
F02A250V1-1/
MP-0100-36-
DW-SH
DB-25S
206061-1
6J4
206430-1 CONNE
24-P00243N001 TRANSFORMER.
95-60335A48 CAT
ASSEMBLY
CAB
LE
ASSEMBLY,SYNTH A5/A11
CABLE
ASSEMBLY,OFFSET
CAB
LE
ASSEMBLY
CABLE
ASSEMBLY
CABLE
ASSEMBLY
TERMINAL,
LUG
WIRE
SOLDER
INSULATION
SLEEVING .093
WIRE
T
APE
WIRE 24
I
NSULATION
TAPE.MYLAR
FOOT,
PLASTIC
SOCKET
GROMMET
COMPOUNO,
THD
ENCAPSULANT
PAD.CRT
CLAMP
WIRE
SCREW
SCREW
LOW
VOLTAGE
SCOPE HORZ/VERT
SCOPE/DVM
CON
RECEIVER ASSY
SYN
THESIZER
AUDIO SYN
PRO
IEE
MIC
BLOWER
HIGH
RF
FAT
FREQUENCY
FUSE
FUSE,CAA
2A FUS
CONN
CONN
CONNECTOA,BATTEAY
CONP'_.,I
AS
THESIZER
CESSOR
110 A 7
E
INTEAFACE~2
RO
PROC
CHAR
ASSEMBLY
VOLTAGE
FRONT
END
PANELINTAF
STANDA
TRIOGE
E,CAATAIDGE
ECTOR
ECTOR
ECTOA
CTOA,BLOWEA
HODE
RAY
A11/
A4
455KHZ
10.245 A4/
lOMHZ
LKG.BLUETYPE
SILICONE
PLATE
PWR
SUPPLA1
AMP
TROL
A4
A6
002A
SYS
GEN,
PWR
SUPP
ASSY
RD
LINE
TUBE
10.7
MHZ
,IF
A11/MOTHEABOARD
A4/
MOTHERBOARD
MOTHERBOARD
A13/A4
16WHT
WHT
20
WHT
NATURAL
WHT
11N
YELLOW
II,GA
20
4-40X.250
6-32X.625
2500X.25L
HIGH VOLTAGE
FPIINTERFACEBD
TEM ONLY)
A10
A11
A13
250V·BA
2SOV-5A
250V·1
1/
2A
25
PIN
4-PIN
MALE
POWER
INPUT
4
CONTACT
N,242
Find
No.
J 003
J 004
J 005
J 006
J 007
J 008
J 009
J 010
L 001
L 002
L 003
L 004
L 005
L 006
HOTHERBOARD ASSE!,IBLY
RTL-·1060A
Qty.
Req.
Part No.
MP-0100·50-0W-GH
MP-010D-36-DW-6H CO
MP-010D-36-DW-6H CONNECTOR
MP-0100·36-DW-6H
MP-0100-50-DW-6H
MP-010Q-50-DW-6H
MP-0100·
MP-0100·50-0W-6H
25-83127001
25-83127G01
25.s3127G01
MS91189-33
MS90539-07
MS91189-37
50-DW
CONN
CONNECTOR
CONNECTOR
CONNECTOR
-6H
CONNEC
CONNECTOR
CHOK
CHOKE,AUDIO
CHOKE,AUDIO
COIL
CO
COIL
Nomenclature
ECTOR
NNECTOR
TOR
E,A
UDIO
IL
Part Value
47UH
470
UH
1
00UH
ASSEMBLY PARTS LIST
Top
System
Level
6·
11
6·12
SECTION 7
LOW VOLTAGE POWER SUPPLY (A1)
7-1. General. The low voltage power supply converts either an AC line input or a DC supply input to the DC
operating voltages required by the system. Appropriate protection circuits are incorporated within the supply
to protect both the supply and the system in vhe event of certain common malfunctions. A block diagram of the
Low Voltage Supply module is shown in figure 7-1 with its schematic shown in figure 7-2.
7-2. Input Power Control. Whenever AC power is connected to the unit the DC BUS within the supply is
supplied by the AC rectifier and filter circuitry. The AC sense circuit provides a control voltage whenever AC is
present that isolates the DC input from the DC bus and drives the front panel AC indicator.
7-3. With power on the DC buss the power supply control circuitry determines the operating mode of the
power supply. With the unit "OFF", the battery charger control circuit is turned on and the frequency standard
control and chopper generator circuits are turned off. When the unit is in"STANDBY", the chopper generator is
off and the frequency standard supply and battery charger are enabled. Finally with the unit "ON", the
frequency standard supply and the chopper generator are enabled and the battery charger is off. Thus the
battery is charged in off and standby modes, and the frequency standard operates in standby and on modes.
7-4. The voltage for the battery charger is boosted above the nominal DC bus voltage to 32 volts by the AC
boost winding. This increase in voltage is necessary for proper charge operation.
7-5. For operation from a DC input, the AC power must be removed from the unit disabling the AC sense
voltage. With the AC power removed and the unit off, no power is present on the DC bus. When the unit is
switched to the standby mode, the DC relay closes, connecting the DC input to the DC bus and the supply
voltage to the frequency standard is enabled. Then with the unit turned on the chopper generator is enabled
and normal operation occurs.
7-6. DC Output Control. Regulation of the DC output voltages is accomplished by regulating only the +5V
output. The transformer winding ratios determing the other output voltages with respect to the +5 volt output.
The +5V output is compared with a stable reference voltage and the resultant control voltage is used to
determine the on time of the pulse-width modulator, thus regulating the input voltage to the chopper circuits.
7-7. The chopper generator provides the 7.9 volt reference voltage, a 20 KHz square wave chopper drive
signal, and a 20 KHz triangle waveform output for pulse-width modulator control. The pulse-width control
comparator compares the triangle waveform with the control voltage. If the control voltage is equal to the mean
DC voltage of the triangle wave the pulse modulator has a 50% duty cycle. For control voltages above and
below the mean value the duty cycle is proportionally increased or decreased.
7-8. The filtered DC output from the pulse-width modulator is chopped through the primary of the output
transformer at the 20 KHz rate. The DC output is alternately switched between the upper half and the lower half
of the primary winding. The current through the primary center tap is detected by a current transformer and its
output used for overcurrent protection.
7-9. Protection Circuitry. The power supply is protected against shorted outputs, high internal
temperatures, and low or high DC buss voltages. In each case the protection circuit pulls the control voltage
line to ground to open up the pulse-width modulator and shut down the supply.
7-1
7-10. Short circuit protection is implemented by monitoring the current in the primary winding of theoutput
transformer. If a secondary output is shorted the primary current will increase significantly causing the
overcurrent detector to pull the control line low shutting down the supply. However, with the supply shut down
primary current will cease and the overcurrent detector will release the control line. With the control line
released the supply will come back on. If the short is still present the cycle will repeat itself. Delay is provided in
the overcurrent detector so that with a shorted output the supply cycles at about a 0.5 second rate.
7-11. Overtemperature protection is obtained by using a thermal switch mounted on the most heat critical
capacitor. If the capacitors temperature exceeds the temperature setting of the thermal switch, the switch
closes to ground shorting the control line and shutting down the supply. Normal operation of the supply will be
resumed when the temperature returns to a safe operating level.
7-12. Protection for high or low DC and AC line inputs is provided by monitoring the voltage on the DC Bus. If
the bus voltage exceeds 20 volts or if the voltage falls below 10 volts, the shutdown circuitry pulls the control
line to ground shutting down the supply. When the bus voltage returns to normal limits, supply operation
automatically resumes.
7-13. High Voltage Supply Control. A 12 volt regulator from the DC BUS provides the bias voltage for the
High Voltage Power Supply (AIO). The primary power for the High Voltage Supply comes from the high
voltage control circuitry. A control line from the high voltage supply regulates the input voltage to the high
voltage transformer. The current used in the high voltage supply is the bias current for the pulse width
modulator circuitry for improved power supply efficiency.
7-2
4-6
17-19
1-3
14-16
11, 12
23-25
17
6, 9
5,
10
4-11
Pl-7
P1-3
JT
VI
'"I
I
I
,
'":
,
-..
AC
,
P2 PWR
I
-..I
'I
I
,
,
'"
BOOST
MAIN
DC
PWR
PWR
AC
AC
INPUT
I
SENSE
OFF
STOBY
ON
CENTER
TAP
FORMER
X
H.V. CONTROL
L.V
CR21, 22, 54,
AC
RECTIFIER
AND
FILTER
DC
RELAY
AND
CONTROL
t
CAl,
AC
SENSE
RECTIFIER
014-16, 18
POWER
SUPPLY
CONTROL
.
LINE
55
Kl, U
h
01
f--
7
--l
020, 22,
DC
I
1
BUS
.
~
..... '
BOOST
RECTIFIER
I
HIGH/LOW
VOLT
SHUT
DOWN
281
--
r
I
,I
....
m
U5
I
CHOPPER
GEN~
AND
I
DRIVER
~--
BATIERY
l
CHARGER
CONTROL
CONTROL
l E
017
FREO
STO
I
l
I
CONTROL
023-25
-112VOLT
r---=1
REGULATOR
05
, 6, 8
PULSE
WIDTH
,,,OOULATOR
1
HIGH
VO
CO
NTROL
~
WIDTH
Sl
OVERTEMP
SHUTDOWN~-
LT
l
J
l
I
lo7. 29
I
l A
VOLTAGE
OVER
OET
...
...
SH-
CURRENT
U3
COMP
CURRENT
LIMIT
I
J I
rl
·vvoLTI
ADJ
.
I C
l
09-1
2
CHO
PPER
T4
URRENT
XFORME
-:!:-
-
h
t-
R
li
---'
T2
~
)-
~
h
-
LOW
RECTIFIER
FILTER
CR17-20
CR26-35
CENTER
VOLT
AND
FREO. STO
SUPPLY
•12V
TAP
u•~•
BATI
TO
HV
HY
XFORMER
VREF +7.
1
'-'''""
VOLT"
DC
LEO
AC
LEO
OVEN
SUPPLY
04
DRIVE
06
DRIVE
+35V"
•13V'
-12V
-5.2V'
+5.2V
•115V
-115V
9V
'
'
'
'
"
'
'
'
'
'
'
P1-10
P1
-13
?
2-2
P2
P1
-8
P1-2
Pl-7
Pl-4
Pl-5
Pl-1
P1-5
Pl-2
P1-4
Pl
-3
Pl-7
Pl-8
Pl-1
8521-29
-1
.6
Figure 7-1. Low Voltage
Block Diagram
,
7-3,7-4
f>ower
Supply
A1
:0
-1
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2':
(J)
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trtr..'!l5'f
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r ---- - - - - - - - - J
.,
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I
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Figure 7-2. Low Voltage Power Supply
Schematic Diagram (Sheet 2
(RTP-1000A)
~
I
I
JI
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JI
· ZO(O'J&.N
LEO CAT HO
1 (
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~
-
•
7
~
.l'l·
O
[YJ
IE
~
c::r::J
I
E?
~
T
r-
- -
c•o-;: --;
~~
7B
T<~~~
1 P
/0
RI~
L _ _
s_o;>
~~--J
DE
LED ANOO
I.
1.1
.\1. 'SU
.~v TO ~
.\/
,
,..E.~
M!:)~
T
.:O.i'
:
>-<
T
t
PPL
"(
:tt~
.,.~
'7
'8
-no
10,11
>J
11
) Go.lO
Jl-
+ 5 "
f'l-l
6A1',. \J O L'T
A1
of
2)
"U
..,
:l
r
"'
0
(")
a
0
..,
-n
<0"
c:
co
-;"
~
r
0
::;:
<
Q.
iii
<.0
ro
"U
0
::;:
~
(/)
c:
"0
"0
-<
Low Voltage Power Supply A 1
RTP-1000A
Find
No.
001
002
003
004
005
006
007
008
009
010
011
012
013
014
016
017
018
019
020
021
022
024
025
026
027
029
030
03
032
033
034
036
037
038
040
041
042
043
045
047
048
049
050
051
052
053
054
057
058
059
060
061
062
063
064
065
066
Oty.
Req.
4
29
AA
AA
27
1
10
. 9
10
AA
Part No.
27 -80335A42
ATP-4001A
ATP-4006A
01-80304A40
15-80335A44
64-P00310N001
4586-97A
64-P00311N001
4566-48
M$35206-248
3-134185
M$35207-264
M$27183-8
M$35338-43
M$35206-228
M$27183-5
M$35338-4
MS35649-262
M$35489-6
07
-P00305N001
SN63WRMAP3
29-15106A63
07-P00305N002
29-P00307N001
4505-632-A-9
MD-3452-G
C9029-4Z
42-14063A01
B09002A001
14-15141A01
B52200F006
B52600F003
851547F015
NA$662-2-8
MS24693-S26
MS24693-S2
M$35206-216
M$35206-230
M$77068-2
M$51861-14
29-15122A10
DE-95
DB-25P
M$27183-3
MS35338-40
MS35649-242
011-1046-000-479
808853A001
MS27183-2 WASHEA,FLAT
MS35206-217 SCAEW.PH 4-40X.500
B51547F013
B52600F002
B52595F019
B5156BF029
G-642
B51567F025
Nomenclature
CHASSIS ASSY
CONTROL
CIRCUIT
OUTPUT
P\'VB
RELAY ASS
COVER
PLATE
CLAMP,CAPACITOA
PLATE,PAOTECTIVE-SMAL
CLAMP,CAPACITOR
SCREW 8-32X.875
SCREW,THD FOAMING
SCREW
WASHER,
WASHER,
SCR
WASHER,FLAT
1
WASHER,LOCK
NUT
GROMMET
BRACKET,CONNECTOR
SOLD
WIRE 22
TERMINAL,FEEOTH
BRACKET,CONNECTOR
TERMINAL,MUL
SPACER,
SOCKET
CU P,FASTENER
CLAMP
WASHER,
INSULATOR
WASHER,
WASHER.MI
BUSHING
SCR
SCREW
SCREW,FH
SCREW,PH
SCREW
TERMINAL,LUG
SCR
TERM
CONNECTOR
CONNECTOR
WASHER,FLA T
WASHER,LOCK
NUT
TERMIN
WASHER.MICA
WASHER,TEFLON
INSULATOR,MICA
LUG
NUT
COMPOUN
WASHER.
ASSY
EMBLY
,PAOTECTtV
FLA
T
LOCK
EW
,HEX
ER
HEX
ASSEMBLY
RECT
COMP
CA
INSUL
EW
EW
INAL
,HEX 4-40
AL,FEEOTHRU INS
-RE
D,
THERMAL
FLAT
TIPLE
CT
PWB A
E-LARG
RU-INS
Part Value
6-32X.250
1Q-3
2X.625
N0
.10
N0 .10
6-32X.375
N0.6
N0
.6
6-32
WHT
2-56X.500
6-32X3/8
4-40X114
4-40X.438
6-32X.500
N0
.6
.112-24X.375
NQ
.4
N0
.4
N0
.2
Find
No.
067
068
069
070
071
072
073
074
077
076
079
080
081
082
083
084
065
086
087
088
089
090
091
092
093
c 019
C020
c
021
c 043
CD44
coso
c 052
c 062
c 063
c 087
c 095
c 097
c
107
c 108
c 109
c 110
CR025
CROSS
CR057
CR061
CR071
l 004
l 016
L 018
L 019
L
021
L 040
L 047
a
oo5
a
oo7
a
oo8
Oty.
Req.
AA
AA
AA
5
5
AA
AR
AA
25
AA
AA
AA
AA
1
AA
AA
12
4
Part No.
B51566F011
MS35338-39
MS35649-222
9317-A-194
RTV3145
MS77068-1
M23053/5-103-9 INSULATION SL
MS3367-5-9 STRAP
11-14167A01
SST21-M
01-80304A56 CABLE
MS35206-215
MS35207-261
MS3367-4-9
M$35333-37
MS35333-37
ABMM-A-C
36D143G030BC2A CAPACITOR
5000507G025FH7
360462G015AA2A CAPACITOR
5000507G025FH7 CAPACITOR
2499-D03X5W502AA CAPACITOR
2499-D03X5W502AA CAPACITOR
2499-003X5W502AA CAPACI
500D507G02SFH7 CAPACITOR
M39003/01-2283 CAPACITOR
2499-Q03XSW502AA CAPAC
2499-003X5WS02AA CAPACITOR
36D462G015AA2A CAPACITOR
2499-D03XSW502AA CAPACITOR
2499-Q03X5W502AA
2499-003X5W502AA CAPACITOR
2499-003X5W502AA CAPACITOR
48-80345A91 DIODE
48-80345A89
48-80345A89
48-6411A15
48-80345A67
24-P00323N001
10273
10273
10273
25C84148F01
10273
10273
48-80345A61
48-869302
48-80345A61
Nomenclature
WASHER,
LOCK
WIRE
WIRE
WIRE
WASHER,LOCK
NUT
,HEX
SPACER,ROUNO
ADHESIVE,SIUCONE
TERMINAL,
LUG
TAPE
,CA
BLE
INK
WIAE,BUS 22
STAAP,CABLE
INSULATION
WIRE 20
ASSEMBLY
INSULATION SLEE
SCREW
SCREW
STRAP
WASHER
WASHER
TIE
MOUNT,CABLE
CA
PACITOR
TOR
IT
OR
CAP~.CITOR
DIODE
DIODE
DIODE
DIODE
CHOKE
FERRITE
BEAD
FERRITE
BEAD
FERRITE
BEAD
COIL
FERRITE
BEAD
FERRITE
BEAD
TRANSISTOR
TRANSISTOR
TRANSISTOR
EEVING
SLEEVI
16WHT
14WH
20WHT
N0
2-56
10X.25
NATURAL
.093 WHT
NATURAL
BLACK
8.0
NG
22
14PIN,DUALSIDE 12LG
VING
16
4-40X.375
10-32X.375
NATURAL
N0
N0
14000UF-30V
500UF-25V
4600UF-15V
SOOUF-25V
SOOOPF-GWV-500
SOOOPF-GMV-500
SOOOPF-GMV-500
500UF-25V
2.2UF-1D-20
SOOOPF-GMV-500
SOOOPF-GMV-500
4600UF-15V
5000PF-GMV-500
SOOOPF-GMV
SOOOPF-GMV-500
SOOOPF-GMV-500
40V-40A
20V
20V
20V SAMP
100V
57MH
65UH
Part Value
T
.2
4.5
WHT
WHT
WHT
.6
.6
3AMP
3AMP
-500
Find
No.
a009
a 010
a
a 012
0017
a
a
o2s
R017
A 019
R
021
A 024
R 025
R 026
R 027
R 028
A068
s 001
T004
VR007
011
o2s
Oty.
Req
Part No.
.
48-80345A50
48-80345A50
48-80345A61
48-80345A61
48-80345A56
48-80345A55
48-80345A43
6S124A25
6S124A01
6S124A25
6S124A25
6S124A39
6S124A39
6S124A49
6S124A49
243E1A05
7B
TF5A-14
24-P00327N001
48-80345A79
Nomenclature
TRANSISTOR
TRANSISTOR
TR
ANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSI
STO
R
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RES
IS
TOR
TH
ERMOSTAT
TRANSFORMER
DIODE
Part Value
100-5-1/4
tD-5-1/ 4
100-5-1/4
100-5-1/ 4
390-5
-1
/4
390-5-1/4
1K-5-1/ 4
tK-5-1
/4
1-5-5
ASSEMBLY PARTS LIST
Low Voltage Power Supply
(Sheet
1)
~-L-~ I -
---r----
--1
~--i
I
~
;·
L i
---1 ..
--·--+---~
Low Voltage Power Supply Control Assy
A1A1
Find
No.
A1
001
002
004
006
007
008
009
010
C001
COlO
CD
c 035
c 036
c 037
C038
c
039
c 040
c 041
c
042
c
045
c
046
c
047
c 048
c
049
c
054
c
056
c 059
C060
C061
c
066
c
067
C 068
c
069
c
070
c
079
coso
C0
c
082
c 083
c
099
c
100
c
101
CAOOl
CA003
CA023
CR024
CR038
CR039
CA040
CR041
CR042
CR043
CA047
CR048
CR049
CA062
Cont
rol Circuit PWB A1A1
RTP-4001A
Qty
.
Req.
AR
2
AR
34
81
Part No.
84-P00471 N001
SRS8-10N
SN63WAMAP3 SOLD
MS35206-214 SCAEW.PH
MS27183-3 WASHEA,FLAT
MS35338-40 WASHER,LOCK
MS35649-242
3439050E104M CAPACITOR
503D336G050CD CAPACITOR
23D84665F
M39014/02-1338 CAPACITOR
21082428862 CAPACITOR
M39014/02-1356 CAPAC
21082428862
21082
187814
3439050
E104M
3439050E104M
3439050E
3439050E104M
3439050E104M
3439050E104M
3439050E104M
3439050E104M
23083441
3439050E
3439050E104M
3439050E104M
23064665F01
3439050E104M
SCZSU105D8500C5
21D82187814
3439050E104M
3439050E104M
3439050E1
3439050E104M
3439050Et04M
3439050E104M
3439050E104M
3439050E104M
3439050E104M
3439050E1
48
·80345A68
48-80
345A68
48
-80345A68
48-80345A68
48·6446
3K02
48
-64463K02
48-84463K02
48
·64463K02
48-84463K02
48-84463K02
48-
84463K02
48-84463K02
48-84463K02
48-844
63K02
01
104M
B 15
104
04M
04M
M
Nomenclature
PWB
,LVPS
CONTROL
SUPPORT,SPACER
ER
NUT
.HEX
WIRE
CAPACITOR
ITO
R
CAPACI
TOR
CAPACI
TOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPAC
ITOR
CAPACI
TOR
CAPAC
ITOR
CAPAC
ITOR
CAPAC
ITOR
CAPACITOR
CAPACI
TOR
CAPACITOR
CAPAC
ITOR
CAPACITOR
CAPACITO
R
CA
PACITOR
CAPACI
TOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CA
PACITOR
CAPACITOR
CAPACITOR
CAPACITOR
DIODE
DIODE
DIODE
DIODE
DI
ODE
DIODE
DIOD
E
DIODE
DIODE
DIODE
DIODE
DIODE
DIODE
DIODE
Part Value
4-
40X
.312
N0.4
N0.4
4-40
22
.lU
F-20-50
33U
F-50V
1
0U
F-25V
.
01UF-10-200
.
01
UFB0-20-200
22-10-50
.
.
OlUFB0-20-200
1000PF-10-100
1UF-20-50
.
.l
UF-20·50
.l
UF-20-50
.1UF-20-50
1UF-20-50
.
.lUF-20-50
.1
UF-20-50
.
lUF
-20-
50
OUF
-20-35
l .
.
lUF-20-50
.
1UF-20-50
.
1UF-20-50
10UF-25V
1UF-20·50
1UF-50
1000PF-10-100
.
1UF-20-50
1UF-20-SO
.
tUF-20-50
.
1UF·20
-50
.
lU
F-20-50
lUF
-20-50
.
.
1UF-20
-50
1UF-20-50
.
.
lUF-20-50
.1UF
-20-5
0
50V-
1A
!lOV-1A
Find
No
CR063
CR064
CR069
CR070
CR
072
CA073
L 001
l
011
l 012
l
013
l
014
l
015
l 020
l 023
l
025
L
026
l
028
l
029
l
030
l 032
L 033
L 034
L
038
0001
0002
a 006
0013
00
0 015
00
0
018
0020
a 022
0 023
a 024
0
025
0 027
a
028
0
030
R 00 1
R
002
R 003
A 004
R
005
R
006
A
018
A
022
A 023
A
028
R029
A
030
A 031
A
033
R034
A 035
A
036
Qty.
.
Req.
1 .
14
16
Part No.
48-84463K02
48-84463K02
48-84463K02
48-64463K02
48-84463K02
48-84463K02
24-83961B01
24-83961801
24-83961801
24-83961801
24-33961801
24-83961801
24-83961801
24-83961
801
24-83961801
WEE-100
24-83961801
24-83961801
24-83961801
24-83961801
24-83961801
24-83961801
24-83961801
48R00869570
46-80345A58
46-80345A60
48A00869571
48-80345A59
48A00869570
48A00869570
48-80345A43
48A00869570
48-80345A43
48-80345A50
48A00869570
48A00869570
48-80345A59
48R00869570
48-80335A79
6S124A45
6S124A57
6S124814
6S124814
6S124A73
6S124A44
6S124A03
6S125A33
6S125A33
6S124A73
6S124A65
6S124A65
6S124A73
6S124A73
6S124A65
6S124A75
6S124A73
Nomenclature
DI
ODE
DIODE
DIODE
DIODE
DIODE
DI
ODE
CHOKE,AF
CHOKE,AF
CHOKE,A
F
CHOKE,RF
CHOKE,RF
CHOKE,RF
CHOKE,R
F
CHOKE,RF
CHOK
E,RF
INDUC
TOR
CHOKE,RF
CHOKE,RF
CHOKE
,AF
CHOKE,AF
CHOKE,RF
CHOKE,AF
CHOK
E,RF
TR
ANSISTOR
TRANSISTOR
TR
ANSISTOR
TRANSISTOR
TRAN
SISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRAN
SIS
TOR
TRANSISTOR
TRANSISTOR
TRAN
SIST
OR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
RESISTOR
RESI S
TOR
RESISTOR
RESIS
TOR
RESISTOR
RE
SIS
TO R
RE
SISTOR
RESISTOR
RES
IST
OR
RESI STOR
RESIS
TOR
RES
ISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
Part Value
100UH
680-5-
1/4
2.
2K-5-1/4
470K-5-1
/4
470K-5-1/4
10K-5
-1/4
620
-5-
114
12-5-1 / 4
220-5-
1/2
220-5-
1/2
tOK-5·1
/4
4.7K-5-1/ 4
4.
7K-5-
1/4
lOK-5-1 / 4
10K
-5-
1/4
4.7K-5-114
12K·5·1/4
lOK-5·1/4
Find
No.
A 037
A
038
A
039
A
040
A 044
A 045
A
046
A
048
R
049
R050
R 051
A
052
A
053
R054
R 055
R
056
A
057
A
058
R 059
R 060
R 061
R
062
R063
R063
R
064
R 065
R 070
R
072
A
080
A 081
R
082
A
083
R084
A
086
R 087
R 088
R089
R090
u
002
u 003
U004
U005
u
006
u 007
VR00
VR
002
VA004
VA005
VA006
Qty.
Req.
1
501
1
Part No.
6S124A73
6S124822
6S124A73
6S124A45
6S124A65
6S124A73
6S124A79
65124830
6S124A73
6S124A65
6S124A89
6S124A49
6S124A89
18DB3452F17
6S12481 1
6S124811
6S124A90
18D83452F15
18D83452F11
6S124A73
6S124A97
6S124A83
6S124A81
6S124A83
6S124A73
6S124A89
6S124A65
6S124A57
6S124846
6S124A35
6S124A92
6S1
24A97
6S124A73
6S124A27
6S124A27
6S124A49
6S
124A09
6S124A89
51-80345A27
51-80345A01
51-80345A01
51-80345A24
51-80345A08
51
-84621 K22
48-82256C25
48-86850C95
48-82256C25
48-82256C45
48-818459
Nomenclature
RESISTOR
RESISTOR
RE
SIS
TO R
RESISTOR
RESISTOR
RESISTOR
RESIST
OR
RESISTOR
RESI
STOR
RESISTOR
R
ESISTOR
RESI
STOR
RESISTOR
AESISTOR,VARIABLE
RESISTOR
RESIST
OR
RESISTOR
RESIST
OA,VAR
, VAR
OR
TO R
STOR
ATED
GRATED
OOE,ZENEA
IAB
IABLE
CIRCU
CIRCUI
CIRCU
CIRCU
CIR
CUIT
CIRCUIT
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESIST
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESIS
RESI
INTEGR
INTEGRATED
INTEGRATED
INTEGRATED
ITER
INTEGRATED
OI
DIODE,ZENER
DIODE,ZENEA
DIODE,ZENER
DIODE
Part Value
10K-5-1/ 4
-1
/4
1M·5
lOK-5-1
/4
680-5-1/ 4
4.7K-5-1 / 4
10K-5-
1/4
18K-5-1/4
2.2M-5-1 / 4
10K-5-1/4
4.
7K-5-
1/4
47K-5-1/ 4
lK-5-1
/4
47K-5-1/4
SDK
360K-5-1/ 4
360K-5-1/ 4
51K·5
LE
-1/4
20K
5K
lOK-5-1/4
tOOK-5-1/4
27K-5-1/4
22K-5-
1/4 NO
MINAL
27K-5-1/ 4
tOK-5-114
47K-5
-114
4.7K-5-1/ 4
2.2K-5-114
10M-5-1/4
270-5-1/4
62K-5-1/4
100K-5-1/4
10K-5-1/4
12Q-5
-1/4
12
0-5-1/4
1K·5-1/ 4
22-5-1/ 4
47K-5-1 / 4
IT
T
IT
IT
12V
-5-
.4
20V·5
-.5
12V-5-.4
9.
1V-5-
.4
ASSEMBLY PARTS LIST
Low Voltage Power Supply
(Sheet
2)
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