User Manual

Contents:
Sec Topic Page
1 Control & Metering Panel Description..........................33-1
2 Amplifier Control Circuit Board Description...................33-2
List of Figures:
Fig Title Drawing Reference
1 Amplifier Control Board Assembly.....................30C1829 sht 8
2 Amplifier Control Board Schematic..........................20B2438
1. Control Panel:
Amplifier control and monitoring is performed by the Control and Metering Panel.
This 19" wide, 3 unit (5¼") panel serves primarily as a mechanical mounting for
the amplifier's control switches, status indicator lights, and a multifunction
meter. The panel is the mounting for the control circuit board described below,
and elsewhere on the chassis is an output metering circuit board which is
described later in this manual.
The Amplifier control panel features as seen from the front, are these:
1. 50 ì A panel meter fitted with a power scale calibrated 0-125 percent;
2. The meter input selector switch for forward and reflected power;
3. Pushbuttons for ON & OFF;
4. Three LEDs providing indications (from left to right) when lighted: EXT 1
interlock is closed,the output amplifier TEMP thermostat is cool, EXT 2
interlock is closed.
The amplifier is provided with a VSWR cutback function that reduces its power
output to save it from harm in the event of very high reflected power such as an
open circuit condition.
The VSWR cutback feature is described in the Metering board section of this
manual.
Comment:
The footer date stamp
must agree with the revision
date.