IFR COM-120C User Manual

5-26
SECTION 5
COMMON PRACTICES
5-2-4 DECODING 2-TONE SEQUENTIAL FORMAT
This procedure configures the RF Receive Operation Screen to decode using the 2-Tone
Sequential format.
o Set RF Field to
Pager Center Frequency .
o Set Input to
T/R .
o Set Attenuation to
30 dB .
o Set Demodulation Type to
FM .
o Cursor to Line Field and press F6
CONFIG .
o Set AF CNTR/DECODE High-Pass Filter to
OFF .
o Set AF CNTR/DECODE Low-Pass Filter to
4 kHz .
o Press F5
EXEC .
o Press F6
RETURN .
o Cursor to Deviation Meter and press F1
ZOOM .
o Set Scp/Demod Cplg: to
AC .
o Set Range to
AUTO .
o Press F6
RETURN .
o Set Tone/Data Code to
USER .
o Press F2
DECODE .
o Observe the frequency and duration of tones received on the RECEIVED TONE
DECODING 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.