Elettronika AUTV/2000LD, Руководство пользователя

Страница: 21 / 58

21
A (see mounting plan BOTTOM - SCH0109BR0, it is a variable resistor used to adjust the A analog input
measure) until you read approximately the same FWD power value on the display.
- REF Power calibration
Disconnect the antenna and connect a wattmeter to the antenna connector. Connect the Forward power
monitoring cable to the Reflected power input connector. Give power to the amplifier until you will read on the
wattmeter a value corresponding to 1
0%
of the equipment nominal power. Then turn the trimmer B (see
mounting plan BOTTOM - SCH0109BR0, it is a variable resistor used to adjust the B analog input measure)
until you read approximately the same REF power value on the display.
- UNB Calibration
Connect a wattmeter before the dummy load. Give power to the amplifier then turn off one slave
module: you will read an amount of unbalancing power on the wattmeter. Turn the trimmer C (see mounting
plan BOTTOM - SCH0109BR0, it is a variable resistor used to adjust the C analog input measure) until you
read approximately the same UNB power value on the display.
1.4 REMOTE CONTROL
It is possible to remotely control the apparatus, thus to monitor the parameters shown on the display of the
Amplifier Control and check the status of the transmitter. This is done through RS232 and RS485 standard
serial communication, digital and analog inputs through the DB25 telemetering connector on the rear panel of
the Amplifier Control.
The pins n. 1 and n. 14 of this connector are used to receive the ON (pin n. 1) and OFF (pin n. 14)
commands, both impulsive and stationary. The digital level on these contacts is usually high, becoming low
when the remote control is active. When a remote command to turn off the amplifiers is received while the
transmitters is ON, the LED ON of the frontal panel blinks and the REMOTE LED lights up.