IFR COM-120C User Manual

6-9
SECTION 6
OPTIONS
6-7 SINGLE SIDEBAND RECEIVE FILTER (OPTION 08)
6-7-1 GENERAL
Installation of the Single Sideband Receive IF Filter provides the ability to monitor SSB
signals. When Filter is installed, 3 kHz Selection is available for IF Bandwidth Filter.
The Single Sideband and 30 kHz IF Filters are mutually exclusive. Only one additional
IF Filter can be installed.
6-7-2 DESCRIPTION OF RECEIVE FUNCTION
RF Receive Operation is changed as follows:
o Analyzer Center Frequency is offset from center graticule
±1800 Hz, depending on
whether Upper Sideband (UB) or Lower Sideband (LB) is selected as Demodulation
Type.
o No Modulation Meter is provided for Single Sideband. Either Modulation Reading or
Modulation Meter, whichever was last selected, is blanked from the screen.
o RF Error Meter is not provided for Single Sideband. RF Error Meter is blanked from
the screen.
Additions and Redefinitions of parameters on the RF Receiver Operation Screen are as
follows:
1. Demodulation Type
Includes two additional settings: UB (Upper Sideband) and LB (Lower Sideband).
2. IF Bandwidth
Includes additional 3 kHz setting.
3. BFO Frequency
Tone/Data Code Field is renamed when UB or LB is selected as Demodulation
Type (1). Displays selected adjustment for BFO Frequency. Adjustment range is
±4.0 kHz. No Soft Function Keys are defined when BFO Frequency is displayed.
4. AGC Setting
Displays current AGC Setting, AUTO or MANUAL. AUTO provides automatic gain
control while MANUAL sets feedback level for automatic gain control to defined
level. Selection of MANUAL accesses Feedback Level Data Field. Range is 0 to
1023.

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.