Acom 1200S User Manual

User's Manual | ACOM 1200S | 1.8-54 MHz Linear Power Amplifier
August 2021
S e c t i o n OPERATION | Page
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c) AUTO OPERATE user settings
AUTO OPERATE user setting can be turned on/off by the operator in the USER PREFERENCES menu (see
Section 5.4 Menu USER PREFERENCES and Figure 5-5 Menu USER PREFERENCES) or by a remote control
command.
When the AUTO OPERATE user setting is OFF, the two modes OPERATE and STANDBY can be changed
alternatively by the OPR/STB button or by a remote control command. At a SOFT FAULT protection trip, the
amplifier will revert to STANDBY and wait for the operator to return it to OPERATE by pressing the OPR/STB
button.
When AUTO OPERATE is ON (see Section 5.4 Menu USER PREFERENCES), the amplifier will start up in
OPERATE mode as soon as you turn it on. At a SOFT FAULT protection trip, the amplifier will also revert to
STANDBY, but will return automatically to OPERATE mode in about 4 seconds.
Even at AUTO OPERATE on, the operator can revert to and remain in a STANDBY mode manually by the
OPR/STB button or by a remote command. The next OPR/STB button push or remote command will switch
the amplifier to the OPERATE mode and restore the normal operation of the AUTO OPERATE user setting.
4.2. Band Change, Standard and Expanded Frequency Coverage
When connected to a transceiver with CAT, the amplifier will change frequency bands automatically,
following the transceiver's operating frequency changes.
Without CAT connection, the bands can be changed either manually or automatically (by the built-in
frequency counter).
The bands are changed manually by the up and down BAND buttons.
For an automatic band change via the built-in frequency counter, make a quite short pre-transmission
(100 ms is enough - a CW dit, or a sound on SSB) and release the PTT for a moment before the main
transmission.
If the new frequency is out of the amplifier's frequency range (see Section 8.1.a) Standard Frequency
Coverage), the transmission request will be denied and the following fault message will appear on the
screen:
"FREQUENCY OUT OF RANGE"
The amplifier specifications are guaranteed within the bands listed in Section 8.1.a) Standard Frequency
Coverage. Frequency coverage changes could be negotiated with ACOM company.

Acom 1200S Specifications

General

Frequency Range	1.8 - 54 MHz
Output Power	1200 W PEP
Modes	SSB, CW, AM, FM, RTTY
Power Supply	220 - 240 V AC, 50/60 Hz
Cooling	Forced air cooling
Input Impedance	50 ohms
Output Impedance	50 ohms
Tube	4CX800A
Harmonic Suppression	Harmonics – better than 50dB below rated PEP output.

Summary

ABOUT DOCUMENTATION

Manual Purpose and Scope

Explains the contents, purpose, and distribution of the user manual.

GENERAL INFORMATION

Introduction and Description

Provides an overview of the ACOM 1200S linear power amplifier.

Owner Assistance and Support

Details how to get support and contact ACOM for help.

Equipment Supplied

Lists the items that come with the ACOM 1200S amplifier.

Key Features and Technologies

Highlights the main capabilities and technologies of the amplifier.

Safety Considerations and Definitions

Defines safety terms and outlines hazards for safe operation.

INSTALLATION

Unpacking and Initial Inspection

Guides users through inspecting the amplifier after delivery.

Line Voltage Selection

Explains the amplifier's power supply voltage range and operation.

Amplifier Location Selection

Provides guidance on choosing a suitable place for the amplifier.

Connections and Cabling

Details how to connect the amplifier to the station's radio equipment.

Connecting External Devices and User Settings

Explains how to connect peripherals and configure user settings.

FIRST POWER-ON, CONTROL SYSTEM, AND INITIAL CHECK

Low Energy STANDBY Mode

Describes the initial power-on state and the standby mode.

Front Panel Overview

Details the buttons, LEDs, and display on the amplifier's front panel.

Initial Power-On Procedure

Guides the user through the first power-up sequence.

Basic Screen Display Explained

Explains the information displayed on the amplifier's main screen.

Control System: Buttons and Menus

Explains how to use the amplifier's control buttons and navigate menus.

Test Transmission Procedures

Outlines procedures for testing the amplifier installation.

OPERATION

RX/TX and OPERATE/STANDBY Modes

Explains how to switch between operating and standby modes.

Band Change and Frequency Coverage

Details how the amplifier handles frequency bands and coverage.

Operation with External Antenna Tuner

Describes using an external antenna tuner with the amplifier.

Automatic Protection System

Explains the various protection mechanisms within the amplifier.

MENUS - SETTINGS AND OPTIONS

Menu AMP MEASURE (Measurements)

Details how to view amplifier performance parameters.

Menu AMP SERVICE (Service Functions)

Describes service functions for checking and adjusting amplifier circuits.

Menu CAT/AUX SETTINGS (Interface Configuration)

Explains how to configure CAT/AUX interface settings for transceivers.

Menu USER PREFERENCES (Customization)

Covers user-configurable settings like auto exit and display brightness.

Menu FAULTS LOG (Diagnostics)

Explains how to access and interpret fault logs for troubleshooting.

Menu RESTORE DEFAULT SETTINGS (Reset)

Describes how to reset amplifier settings to factory defaults.

REMOTE CONTROL

Remote Control via ACOM eBox

Details remote control using the ACOM eBox Ethernet device.

Remote Control via RS-232 Interface

Explains remote control using the RS-232 serial interface.

MAINTENANCE

Periodic Maintenance Checks

Outlines regular checks for connections, cleanliness, and SWR.

Cleaning Procedures

Provides instructions on how to clean the amplifier's exterior and vents.

Fuse Replacement

Details the procedure for safely replacing primary mains fuses.

Using Fault Codes for Diagnostics

Explains how to use fault codes for diagnosing issues.

Firmware Updates and Management

Covers firmware versions, prerequisites, and update procedures.

SPECIFICATIONS

Technical Parameters

Lists the technical specifications and performance parameters of the amplifier.

Amplifier Functions Overview

Lists the key functionalities and control methods of the amplifier.

Storage and Shipment Guidelines

Details environmental requirements and procedures for storing and shipping.

Disposing and Recycling Information

Provides guidance on responsible disposal and recycling of the product.