Codan Radio Communications AMP-4-800 Manuale Utente
4
Power Amplifier AMP-4-800-30-00
1. General description.
The power amplifier (PA) is a one stage unit, working in AB-class operation mode. In addition to the
power amplifier section, the PA contains the power control, status monitoring and protecting circuitry,
as well as voltage regulation for supplying the RF and main control circuits.
The output power may be controlled either by the external analog signal (remote control), or by
potentiometer, accessible from the front panel (local control).
The PA is provided with a forced air cooling system and is protected against overheating, overvoltage
and overcurrent.
Two LEDs on the front panel indicate the unit status. The green LED “TX” shows that the output power
is present at the amplifier’s output. The red LED “G/F” (general fault) turns on during overheating,
overvoltage or overcurrent.
The PA has two outputs (open collector) for remote status monitoring. In an alarm state, the level is
pulled low.
power amplifier section, the PA contains the power control, status monitoring and protecting circuitry,
as well as voltage regulation for supplying the RF and main control circuits.
The output power may be controlled either by the external analog signal (remote control), or by
potentiometer, accessible from the front panel (local control).
The PA is provided with a forced air cooling system and is protected against overheating, overvoltage
and overcurrent.
Two LEDs on the front panel indicate the unit status. The green LED “TX” shows that the output power
is present at the amplifier’s output. The red LED “G/F” (general fault) turns on during overheating,
overvoltage or overcurrent.
The PA has two outputs (open collector) for remote status monitoring. In an alarm state, the level is
pulled low.
2. General parameters.
- Frequency range, MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 768 - 869;
- Output power, W;
- Output power, W;
o
nominal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 30;
o
minimum set by local or remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 20;
- Harmonic level at the output, dBc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < -70;
- Input power, W:
- Input power, W:
o
nominal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0;
o
maximum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0;
- Remote control voltage, V:
o
working range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 – 17;
o
guaranteeing the nominal output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 11;
- Enhancer:
o
input and output impedances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 ohms;
The Manufacturer's rated output power of this equipment is for single carrier operation. For situations
when multiple carrier signals are present, the rating would have to be reduced by 3.5 dB, especially
where the output signal is re-radiated and can cause interference to adjacent band users. This power
reduction is to be by means of input power or gain reduction and not by an attenuator at the output of the
device.
when multiple carrier signals are present, the rating would have to be reduced by 3.5 dB, especially
where the output signal is re-radiated and can cause interference to adjacent band users. This power
reduction is to be by means of input power or gain reduction and not by an attenuator at the output of the
device.
3. Construction.
Unit is realized as a module.