16
well as the reflected power and tuning quality, etc., are continuously monitored by the micro-controller.
Many software-derived protections are based on this information.
* Detailed electrical schematic diagrams are available from ACOM or from your dealer on request.
5-5. Service Functions
By pressing the
OPER
and
RTTY
buttons simultaneously, the upper LED bar-graph is switched to the
service mode, which is indicated by both red bar-graph lights and the yellow
G1
light illuminating. Pressing
the
OPER
and
RTTY
buttons together again will select additional service measurement functions.
Pressing them a final time will return the amplifier to the normal operating mode. These steps are
detailed below:
a) Press the
OPER
and
RTTY
buttons together. The two red lights on the right side of the upper
bar-graph will illuminate to confirm that the amplifier is in the service mode. The yellow
G1
light will
also illuminate. The upper bar-graph should show a grid 1 current reading no higher than 5 mA (5 LEDs
illuminated).
b) Pressing the
OPER
and
RTTY
buttons once again will now illuminate the yellow
G2
light. This
provides an approximate reading of grid 2 voltage. The upper bar graph should show a voltage reading
within the range of either 270-330 Volts (9-11 LEDs illuminated) for RTTY or 210-360 Volts (7 to 12
LEDs illuminated) for SSB and CW.
c) Pressing the
OPER
and
RTTY
buttons yet again will illuminate the yellow
IP
light. This provides an
approximate reading of combined plate current and grid 2 current. The reading should be no higher
than 500 mA (10 LEDs illuminated) for RTTY or 550 mA (11 LEDs illuminated) for SSB and CW.
d) Pressing the
OPER
and
RTTY
buttons a final time will restore the upper bar-graph to its normal
function of indicating peak forward power.
NOTE
The auto-protection system will continue to operate in the service mode.
6. SPECIFICATIONS
6-1. Parameters
a) Frequency Coverage: All amateur bands in the 1.8-29.7MHz frequency range; extensions and/or
changes on request.
b) Power Output: 700 W PEP or 500 W continuous carrier.
c) Intermodulation Distortion: Better than 35 dB below rated output.
d) Hum and noise: Better than 40 dB below rated output.
e) Harmonic Output Suppression: Better than 50 dB below rated output.
f) Input and Output Impedance:
- Nominal value: 50 Ohm unbalanced, UHF (SO-239) type connectors;
- Input circuit: broadband, VSWR less than 1.2:1, 1.8-30 MHz continuously (no tuning, no switching);
