IFR COM-120C User Manual

6-74
SECTION 6
OPTIONS
6-14-4 EDACS TRUNKING AUTOMATIC TEST EXECUTION
Press F3 START to execute the Automatic Test. At least one of these tests must be
ENABLED: Registration, Radio Test or Repeater Test. If one or more of these tests is
not ENABLED, the screen displays, “INVALID SELECTS” and the test does not execute.
The Audio Test only applies to the Radio Simulator and Repeater Simulator.
A. REGISTRATION
When ENABLED, Registration executes first. The field status changes from
ENABLED to RUNNING. The Control Channel programmed from the Setup screen
is used for the RF Frequencies and the COM-120C begins generating Site ID
messages (overhead). The screen prompts to, “Turn on Power to Radio.”
The COM-120C then looks for the login message (data) from the Radio. The
Radio must be programmed to do automatic login. When the login message is
found, the COM-120C acknowledges the login back to the Radio and captures the
Radio’s Group and Logical ID which displays along with the Control/Working
channel frequencies used. The field status changes to COMPLETE when the test
is finished and proceeds to the next ENABLED part of the Automatic Test.
B. RADIO TEST
If ENABLED, Radio Test executes next. The field status changes from ENABLED
to RUNNING. The Control Channel programmed from the Setup screen is used
for the RF Frequencies and the COM-120C begins generating Site ID messages
(overhead). The Radio locks onto the COM-120C. If the Push-to-Talk cable is
properly connected, the Radio performs a hands-free PTT (Group Call). If not,
the screen prompts to manually press the PTT button, “Press PTT now (Group
Call)”.
The Radio should connect with the COM-120C at this point. If a successful Group
Call was achieved, the Control/Working channels and the Radio’s Group/Logical
ID’s are displayed and the test measurements begin with the message: “Taking
Measurements...”
The PTT button must remain depressed during the measurements (if doing manual
PTT). If not, the Radio Test terminates and the field status changes to
DROPPED. The message, “CALL DROP” is briefly displayed.
When the Voice Peak Deviation Test begins, the screen prompts to whistle (or
blow) into microphone and updates the deviation accordingly. The PTT button
must remain depressed during Voice Peak Deviation measurement.
If Audio Tests are planned, skip this test. The Radio’s microphone is disabled if
Audio Connectors are in place.
If the CONT or SKIP softkey is pressed, the Radio test finishes and the field
status changes to COMPLETE.
Results of the test are shown and the screen prompts to release the PTT button.
If the Radio has the Push-to-Talk cable connected, the PTT is automatically
released.

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.