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Yaesu FT-920 User Manual

Yaesu FT-920
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FT-920
OPERATING
MANUAL
YAESU MUSEN CO., LTD.
1-20-2 Shimomaruko, Ota-Ku, Tokyo 146-8649, Japan
YAESU U.S.A.
17210 Edwards Rd., Cerritos, CA 90703, U.S.A.
YAESU EUROPE B.V.
Snipweg 3, 1118DN Schiphol, The Netherlands
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Trading Estate
Winchester, Hampshire, SO23 0LB, U.K.
YAESU GERMANY GmbH
Am Kronberger Hang 2, D-65824 Schwalbach, Germany
YAESU HK LTD.
11th Floor Tsim Sha Tsui Centre, 66 Mody Rd.,
Tsim Sha Tsui East, Kowloon, Hong Kong

Table of Contents

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Yaesu FT-920 Specifications

General IconGeneral
Antenna Impedance50 ohms
Supply Voltage13.8 V DC ±15%
Current Drain RX1.5 A
Current Drain TX20 A
Memories99
ModesAM, FM
Receiver TypeSuperheterodyne
Receiver Sensitivity0.25 µV (SSB, 10 dB S/N)
IF Bandwidth2.4 kHz (SSB)
Frequency Range RX100 kHz - 30 MHz
Power Output100 W (SSB, CW, FM), 40 W (AM)

Summary

General Description

Specifications

General and Transmitter Specs

Details on frequency ranges, modes, power output, and modulation.

Receiver and Tuner Specs

Details on sensitivity, selectivity, IF, and tuner range.

Accessories

Supplied and Available Options

List of included accessories and optional items.

Installation and Safety Precautions

Initial Setup and Connections

Inspection, power, location, and grounding guidelines.

Safety Warnings and Precautions

Warnings on electrical shock, antennas, RF exposure, and compatibility.

Accessory and External Device Interfacing

Amplifier and Digital Modem Connections

Interfacing linear amplifiers and digital modems.

CW Keying, Antenna, and PC Connections

Connecting CW keyers, antennas, and computers.

Front Panel Controls - Core Functions

Power, Mode, VOX, and Mic/Phones Jacks

Controls for basic operation, voice switching, and audio levels.

Tuning, STEP, and Lock Switches

Controls for frequency tuning, step selection, and locking settings.

Front Panel Controls - Advanced Features

Antenna, Squelch, PROC, and MONI Controls

Controls for antenna selection, squelch, speech processor, and monitor.

NB, VFO Indicators, Memory, and Feature Switches

Controls for noise blanker, VFO indicators, memory, and special features.

CW, DSP, Tuner, and Interference Controls

Controls for CW keying, DSP, antenna tuner, and interference reduction.

Rear Panel Connectors and Switches

Data, Control, and Power Jacks/Switches

Jacks for CAT, PTT, keying, TR-RY, Tx GND, and power.

Peripheral, RF, and Antenna Jacks

Jacks for peripherals, RF signals, and antennas.

Operation - Receiving and Modes

Receiving Setup and Antenna Selection

Initial audio setup and antenna configuration.

Mode Selection and CW Sideband Note

Selecting operating modes and CW sideband options.

Operation - Frequency Management

Bandwidth, Band Selection, and Tuning Methods

Adjusting bandwidth, selecting bands, and tuning frequencies.

Receiver Enhancements

Clarifier, CW Tuning Aids, and RF Preamplifiers

Features to improve reception clarity and signal quality.

Signal Reception and Interference Handling

AGC, Squelch, and General Coverage

Controls for gain, squelch, and out-of-band reception.

Interference Reduction Techniques (SHIFT, DSP)

Using SHIFT control and DSP filters to mitigate interference.

Noise and Interference Mitigation (Notch, GAIN, NB, NR)

Using Notch, RF Gain, NB, and NR for noise suppression.

Strong-Signal and Low-Frequency Operation Aids

IPO and ATT Attenuator Controls

IPO and Attenuator for managing high signal levels.

Digital Voice Recorder Operation (DVR)

Transmitting Operations

Important Note on Antenna Connection

Warning about connecting antenna/dummy load before transmitting.

Automatic Antenna Matching System

Built-in tuner for matching antenna systems to the transceiver.

SSB Transmission Procedures

SSB Basic Operation, VOX, and DSP

SSB setup, voice switching, and speech processing.

CW Transmission Procedures

CW Keying Modes (Straight, Semi-, Full Break-In)

Different CW break-in modes and their operation.

CW Keying and Memory Functions

Electronic and Memory Keyer Operations

Using built-in keyers and storing repetitive CW messages.

Split Frequency and Satellite Operation

Split Frequency Operation Modes

Using Clarifier and Split VFO for frequency separation.

Mode K Satellite Operation

Operating procedures for Mode K satellite communication.

Digital Mode Operations

AFSK RTTY and Packet Operation

Using AFSK with TNC for RTTY and Packet.

FSK RTTY Operation

Utilizing FT-920's tone generator for FSK RTTY.

AM Transmission Procedures

AM Basic Operation

Steps for connecting mic, setting controls, and transmitting AM.

FM Operation Procedures

Simplex and Repeater FM Operation

Basic FM simplex and repeater operation.

Linear Amplifier Tuning Procedures

Memory Management System

Memory Channel Storage and Recall

Storing and recalling standard memory channels (1-99).

QMB and CALL Channels

Quick storage/recall (QMB) and easy-access (CALL) channels.

Split Frequency Memory Channels

Storing and recalling split frequency memory channels.

Adding Alpha-Numeric Labels to Memory

Appending labels to memory channels for identification.

Scanning and Dual Watch Features

Scanning Operation and Skip Programming

Basics of scanning and programming channels to skip.

Programmable Memory Scan (PMS) and Resume Choices

Scanning within limits and customizing resume behavior.

Dual Watch Operation

Monitoring two frequencies simultaneously.

Menu System Configuration

Menu System Overview and Operations

Accessing Normal, Panel, and Quick Menu modes.

Menu Item Details - General and Tuning Settings

Explains U-01 to U-14 settings for dials, steps, display, groups.

Menu Item Details - Scanning, Keyer, and RTTY

Explains U-15 to U-43 settings for scan, keyer, and RTTY.

Menu Item Details - Packet, RF Preamp, ATU, and Amplifier Tuning

Explains U-44 to U-57 settings for packet, preamp, ATU, and amp tuning.

Menu Item Details - Carrier Point, VOX, Filters, and Reset

Explains U-58 to U-73 settings for carrier, VOX, filters, and reset.

Interfacing to VHF and UHF Transverters

Phone Patch Operation

Phone Patch Overview and Requirements

Explains phone patch linkage and requirements.

Phone Patch Operation Control Methods

Describes manual PTT or automatic VOX control for phone patch.

Computer Control System (CAT)

Constructing and Sending CAT Commands

CAT Data Protocol and Structure

Constructing and Sending CAT Commands

Opcode Command Chart Notes

Data Structures and Codes

Downloading FT-920 Data

Status Update (10H)

Command to download frequency and memory channel data.

Status Flags Request (FAH)

Command to download eight status flag bytes.

Microprocessor Reset Procedures

Backup Battery Replacement

Installation of Optional Filters

Installation of High-Stability Oscillator TCXO-7

Installation of FM Unit FM-1

CAUTION!

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