Technical Manual

NORMAL OPERATION

Once the Installation and the Initial Turn-on are complete, operation is simple. With the AC ON/OFF

switch in the ON position, the transmitter is activated by pressing the OPERATE (OPR) button next to

the LCD display. This will now enable the transmitter. All of the green front panel operating status

indicators should illuminate and the power metering should display a percentage of output power. To

control the output power of the transmitter, adjust the ALC voltage (see procedure below). To turn the

translator off simply move the translator to STANDBY and turn the AC ON/OFF switch to OFF.

A problem with the transmitter will usually reveal itself by a loss (either total or partial) of power. If there

is no power at the output of the unit, check to see that the AC switch is ON and the transmitter is in the

OPERATE mode. If so, consult the troubleshooting section of this manual.

Small changes in the output power are acceptable, but if the translator must be adjusted 10 to 20 percent

or more to maintain the desired output power, there may be a problem in the amplifier section. Refer to the

troubleshooting section of this manual.

1. ALC SET UP PROCEDURE

The output power of the transmitter is preset from the factory for an output level which

corresponds to specifications. If output power needs adjusted, the ALC can be manually adjusted

to give a lower or greater output.

With the transmitter in operate, press the next button below the LCD display to view the ALC

voltage. . The meter should indicate 0-8 volts when the average output power level is within the

effective operating range of the ALC circuitry

If the ALC voltage reading drops below 0 volts, this indicates that the input signal has risen above

the ALC window and the red High Input indicator which is on the front panel will light.

If the ALC voltage exceeds 8 volts, this indicates that the input signal has fallen below the

acceptable ALC window and the red Low Input indicator will light.

If either extreme is the case, place SW1 into the ALC1 position and adjust untill both High Input

and Low Input LEDs are green.

2. ALC ADJUSTMENT

If the output power level needs to be adjusted, place the front panel switch SW2 into the ALC2

position and adjust ALC2 potentiometer to set output power to 100% as indicated on Control

Monitoring sled LCD display.

The ALC can be disabled by moving SW2 to the manual (MAN2) position. The MAN2 GAIN

potentiometer now becomes the direct adjustment for amplifier gain.

This completes the ALC set up for the Transmitter.