Acom 2000A Operating Manual

Also see for 2000A: Operating manual

Acom 2000A Operating Manual Manual pdf 6 page image

4• TFT color display. All amplifier status indicators and comments are presented on the RemoteControl Unit (RCU) display. The HELP sub-menu gives on-board technical assistance andtroubleshooting suggestions, power-on elapsed time hours etc. Two color strips display peakforward and reflected power. Indicators are provided for OPERATE/STANDBY and for faultconditions.• Easy maintenance. Information on the amplifier’s internal status is stored in an "INFO BOX"for the 12 most recent protection faults. This information can be read directly from RCU displayby the operator.• Less QRM, improved Electro Magnetic Compatibility during tuning. Retuning can be achievedin three ways: manually via the RCU, by the transceiver’s CAT system, or with a very shorttransmission - a single word on SSB or a dot (even at 40 wpm) on the new frequency is enoughto change bands or segments automatically in a second. Also, the initial process of user tuningsettings preparation is done in less than three seconds at a quarter of nominal output power.• Saves space on the operating table. Since the amplifier is controlled by the RCU, the mainunit can be located up to 20 meters (65 feet) from the operating position. The supplied 3 meter(10 ft) cable may be easily extended to the needed length.• Operates automatically without special signals from the transceiver - “ground on TX” (PTT)and 60W RF drive power are sufficient to control and operate the amplifier.• CAT connection to most transceiver models.• Broadband input matching circuit resulting in very good load to the transceiver over the entireshort wave spectrum.• Uses two 4CX800A (GU74B / ГУ74Б) Svetlana (Светлана) high performance ceramic-metaltetrodes with plate dissipation of 800W each (forced air cooling, grid-driven).• ACOM maintains strict adherence to the tube manufacturer’s specifications for cooling and forthe sequence of applying and removing the different tube voltages. Starting filament current islimited, and there is constant monitoring and protection of all supply voltages and currents. TheBias Optimizer decreases the heat dissipated from the tubes, and there is automatic protectionagainst overheating or insufficient air flow.• A novel and innovative output RF Arc protection is employed. It safeguards the amplifier,antenna, antenna selector and tuner against severe damage in case of possible break down.• High voltage power supply inrush current protection which eliminates the danger of affectingsensitive devices, connected to the same mains circuit. The amplifier can be configured for 5nominal line voltages: 100, 120, 200, 220 and 240VAC (50 or 60Hz). Other nominal valuespossible on request.• Continuous measuring and/or monitoring of 20 most important parameters of the amplifier,exciter and antennas via RCU and computer as described in the TECHNICAL SUPPLEMENT.• All functions are accessible from a computer via RS232 serial port connection. Also, localnetworking capability exists for more than one set of amplifier / antenna units working in a system.1-5. Safety Considerations, Explicit DefinitionsThe ACOM2000A Automatic HF Linear Amplifier is a Safety Class I unit, i.e. the third groundinglead of its mains cord (which is colored yellow with two green stripes) and the ground stud onthe rear panel of the amplifier, marked GND, both must be connected to the station's grounding