User Manual

Exhibit 6 page 8 of 16
The button labeled A1-A2 (Section 4-4) changes the antenna output to either antenna 1 or antenna 2,
according to the operator’s choice. It is the operator’s responsibility to connect suitable antennas to the
ANT1 and ANT2 connectors on the rear panel of the amplifier.
The red TX LED illuminates whenever the KEY-IN input is keyed (closed to ground), i.e., when the
transceiver goes into the transmit mode. See Section 2-4(d).
The BAND knob controls the band switch, and LOAD and TUNE are used to adjust their respective variable
air capacitors in the amplifier’s output circuit. The settings of these three controls must be changed at each
band change as well as when an antenna is changed. The three LED indicators located above the knob
LOAD are called the “TRI tuning indicator” and they are used to achieve antenna impedance matching
during a re-tune procedure. Please see Section 4-5 for a discussion of the tuning procedure.
CAUTION
To avoid damage not covered by the amplifier’s warranty, do not turn the BAND switch while transmitting.
Switching while transmitting is called “hot switching” and it will cause irreparable damage to the band switch.
There are three warning LED indicators and one fault LED indicator located in the bar-graphs area. The
following describe the error conditions and the correct responses (except for the service functions - Section
5-5):
- G1 – when illuminated, a control-grid overload condition exists; reduce the drive power for safe
operation;
- G2 - when illuminated, a screen-grid overload conditions exists; reduce the drive power and/or refresh
the tuning (Section 4-5) for safe operation;
- IP - when illuminated, a plate current overload condition exists; reduce the drive power and/or refresh
the tuning (Section 4-5) for safe operation;
- F – when illuminated, the amplifier automatic protection has tripped. If F is accompanied with one of the
G1, G2, or IP condition indicators, the cause of the protection trip will be evident. When F alone is
illuminated, check the keying wiring, Section 2-4(d). See Section 4-6 for details about the auto-
protection system.
4. OPERATION
Operation of the amplifier is simplified through ACOM’s innovative TRI tuning aid, Auto-Operate function,
and automatic protection systems. To make full use of the amplifier’s potential and to configure it to local
conditions, the following information should be read carefully.
4-1. Turning ON and OFF
In order to turn on the amplifier, press the power switch ON at the bottom-right corner of the front panel. The
LED indicator above the switch will glow green and the audible cooling fan will start. Following a series of
automatic self-tests, the OPER LED will begin to flash green and will continue to do so during the 30-second
warm-up period. Throughout this period, the amplifier will remain in the standby mode, and the transceiver
may continue to be used. Also during this period, the A1-A2 button may be pressed to change antennas,
i.e., between the antennas connected to the ANT1 and ANT2 terminals on the rear panel of the amplifier.
Switching between the antennas does not affect the warm-up process.
CAUTION
To avoid damage not covered under warranty, do not change the antenna output during a transmission, i.e.,
never press the A1-A2 button when transmitting.
NOTE
When you intend to have a short operating break, it is better to place the amplifier in the standby mode
rather than turning it off. Tubes life is shortened by repeatedly turning it on and off.
NOTE