IFR COM-120C User Manual

3-17
SECTION 3
COMPOSITE
3-3-9 DUPLEX SCREEN
The Duplex Operation Screen is used to define and activate the COM-120C RF
Generator and RF Receiver simultaneously at the same frequency or offset frequencies
and is accessed by pressing the DPLX Test Mode Key.
The Duplex Operation Screen displays in the configuration last used.
1. Header Bar
Displays current operation
mode.
2. Duplex Generate Prompt
Accesses Duplex Generate
Operation Screen.
3. Duplex Generate
RF Field
Displays current Duplex
Generate Frequency.
Range is 0.0000 to
1000.0000 MHz.
4. Frequency Offset
Displays frequency
difference between
Duplex Generate RF Field
(3) and Duplex Receive RF Field (20). Range is from -999.7500 to 999.750 MHz.
5. Output Level
Displays Output Level. If T/R Connector is selected for Output (6), range is -130
to -40 dBm, 0 to .002236 V, 0 to 2.2360 mV or 0.07 to 2236.0 µV. If AUX RF
Connector is selected for Output (6), range is -130 to -13 dBm, 0 to 0.050059 V,
0 to 50.0593 mV or 0.07 to 50059.3 µV.
6. Output
Displays Output Connector. Displays T/R, T/R Gate, AUX or AUX Gate. Gated
Output is active only when microphone, attached to MIC/ACC Connector, is keyed.
7. Modulation Source Window
Displays active Modulation Sources. Inactive Modulation Sources are not shown.
If two (or more) sections of the RF Modulator are set in conflict (e.g. GEN1 set for
PM and GEN2 set for FM, or GEN1 set for 0.01 kHz deviation and GEN2 set for
2.60 kHz deviation) the screen displays the invalid source grayed out.
Mod Src : GEN 1
Deviation : 5.0 kHz
Shape : SINE
Freq : 1000.0 Hz
Format : TONE
- 40.0 dBm
T/R
GEN1
0.0000 MHz
DISTORTION:
AF FREQUENCY
T/R
FM
OFF
- - -
FM
RF :
DEVIATION:
DUPLEX
Tone/Data Code: DCS
00607041
Offset :
Level :
Output :
525.0000 MHz
RECEIVE
GENERATE
RECEIVE AND GENERATE
Input :
Demod :
FL :
RF : 525.0000 MHz
IF BW: 15 kHz
Atten: 0 dB
RF Power:
RF Error Freq: 0.001
3.0 %
1000 Hz
5.0 kHz
0.0 mW
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
17
18
19
20
21
22
kHz
Duplex Screen

IFR COM-120C Specifications

General

Resolution	1 Hz
RF Input Impedance	50 Ω
Third Order Intercept (TOI)	+10 dBm
Display Type	LCD
Display Resolution	640 x 480 pixels
RF Input Protection	1 W
Power Requirements	100-240 VAC, 50-60 Hz
Input VSWR	1.5:1
Phase Noise	-80 dBc/Hz @ 10 kHz offset

Summary

COM-120C Communications Service Monitor Operation Manual

Preface

Provides an overview of the manual's organization, scope, and intended audience.

Section 1: Introduction

Introduces the COM-120C, its functions, and basic operation modes.

Section 2: Installation

Provides information on preparing the COM-120C for use and operating precautions.

Section 3: Composite Controls

Details front and rear panel controls, screens, soft function keys, and menus for system interaction.

Section 4: Operation Procedures

Covers configuring and performing various operational tests like RF Generate, Receive, and Duplex modes.

Section 5: Common Practices

Offers suggestions for equipment and screen setups for common RF Generate and Receive practices.

Section 6: Options and Features

Describes optional features and accessories for the COM-120C, including testing capabilities.

Safety and Precautions

General Safety Warnings

Covers high voltage equipment hazards, servicing, case removal, and safety identification terms.

Battery Handling and ESD Precautions

Provides warnings for sealed lead-acid battery use and precautions for handling ESD-sensitive parts.

Appendix A: User I/O Connectors and Pin-Outs

Table of I/O Connectors

Details the connector names, types, signal direction, and signal types for COM-120C I/O ports.

Connector Pin-Out Tables

Provides specific pin assignments for MIC/ACC, GPIB, and RS-232 connectors.

Appendix B - Abbreviations

Soft Function Key Descriptions

An alphabetical reference for COM-120C soft function keys and their descriptions.

Appendix C - Repacking for Shipping

Shipping and Repacking Procedures

Details authorization, tagging, container requirements, freight costs, and step-by-step repacking instructions.

Index

Index-1

Alphabetical listing of topics and their corresponding page numbers for easy reference.