User's Manual

3
- Carrier attack time, ms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 5.0;
- Remote control voltage, V:
o working range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 – 9.5;
o guaranteeing the nominal output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 7.0;
o guaranteeing the stand-by mode operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 1.0;
- Enhancer:
o nominal passband gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.7 dB;
o nominal bandwidth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450-512 MHz;
o rated mean output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 W;
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.
3. Construction.
Unit is realized as a module – see Fig. 2.
There are at the front panel:
- RF connectors;
- Fan, which pushes the air across an internal heatsink;
- Status LED;
- Access hole to the power set potentiometer;
- Handle for moving the unit into/from a subrack;
- Four quick release fasteners for fastening the unit in a subrack.
Front panel dimensions are 5.585”(W) x 5.055”(H). The full length of PA does not exceed 8.2”.
The PA contains two PCB assemblies: the Main Board Assembly and the DC Connector Board
Assembly.
The Main Board is placed inside a shielded compartment and is to the main chassis plate/heat spreader.
The heatsink is attached to the outer side of Main Plate, as well as the fan controlling thermal switch.
The Main Board contains RF circuitries and the majority of DC circuits. The DC Connector Board
includes the LED, power controlling potentiometer, a fan voltage regulator and three DC connectors.
The control, monitoring and supply lines between the Main Board Assembly and the DC Connector
Board Assembly are routed through feedthrough filters, screwed into the Main Plate and are connected
through an 8-wire cable and two pairs of connectors (6-pin and 3-pin on the cable end, and 6-pin and 4-
pin in the DC Connector Board). This allows the same cable to handle the two modes of operation
(remote or local, depending on which pins are connected.