IFR COM-120C User Manual

3-11
SECTION 3
COMPOSITE
3-3-4 EDITING NUMERIC DATA FIELDS
The primary method of editing data in numeric data fields such as frequencies and
levels is to use DATA ENTRY Keys. The step-by-step procedure for this method is as
follows:
o Position cursor on field selected for data entry using DATA SCROLL Keys or TAB
Function.
o Enter numeric value using DATA ENTRY Keys.
o Press ENTER Key to complete operation.
A second method to change current numeric values in small amounts is to use the DATA
SCROLL Keys and/or DATA SCROLL Spinner. This method changes one digit of the
value directly, but more significant digits are affected indirectly as the edited digit
passes zero in either direction. The step-by-step procedure for this method is as
follows:
o Position cursor on field selected for data entry using DATA SCROLL Keys or TAB
Key.
o Press ENTER Key to highlight field.
o Digit in field to be edited is not highlighted. Pressing DATA SCROLL Key (
→)
moves highlight to less significant digit. Pressing DATA SCROLL Key (←) moves
highlight to more significant digit.
o Once digit to be edited is selected, press DATA SCROLL Key (
↑) to increase digit
value and DATA SCROLL Key (↓) to decrease digit value. Alternate method is to
use DATA SCROLL Spinner. Turning DATA SCROLL Spinner clockwise
increases value and counterclockwise decreases value.
o Press ENTER Key to complete operation.
3-3-5 MAKING SELECTIONS FROM MENUS
Whenever the number of selections for the position being edited exceeds the number of
available Soft Function Keys, a MENU Soft Function Key is used. Pressing the MENU
Soft Function Key opens a window of selections for the current cursor location. The
window cursor is located at the currently active selection. To choose a different
selection, move the cursor using the DATA SCROLL Keys or DATA SCROLL Spinner to
the selection. Press the ENTER Key to complete the operation.
3-3-6 ESCAPING FROM EDIT WITHOUT CHANGE
An edit procedure can be exited at any time, without change, by pressing the ESC Key.

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.