User's Manual

P5XXUH1

Power Amplifier User’s Manual

1. General Information.

Power Amplifier (PA) is a AB/C-class unit. It is intended for amplification of single carrier

phase (frequency) modulated (manipulated) narrowband signals.

The working frequency range lays between 450 MHz and 512 MHz for UH unit. Code “xx”

shows the input power range:

Code: R1 R2 R5 1 2 5 10 20

Range, W: 0.1-0.2 0.2-0.5 0.5-1.0 1.0-2.0 2.0-5.0 5.0-10 10-20 20-50

In the normal operating mode the minimum output power is 50 W.

Input VSWR is not greater than 1.8:1.

PA meets all FCC requirements to harmonic and spurious levels.

The nominal power supply voltage is 13.8VDC.

DC current consumption does not exceed 12.5A at 13.8V

Working ambient temperature range lies from -30

ºC to +60ºC.

Input and output power levels are set up in the factory. Customer has an opportunity to reduce

the output power, adjusting the special trimmer resistor in the unit, or picking up the value of outer

resistor, connected to PA control pin.

PA has automatic power control loop that provides the stability of output power during the

normal operation and all necessary changes of power in the case of load mismatch or unit

overheating.

PA is intended for rack mounting in the standard 19” cabinet. The front panel is 7” high. The

deepness of unit does not exceed 5”.

Four LED at the front panel indicate the status of unit operation.

The hole in the side wall gives an access to the trimmer resistor, which allows reducing the

output power against the set value.

There are two N connectors at the back of chassis.

There is power filtering DC connector at the back of chassis with two # 6-32 screws for “+”

pole and for “-“ pole.

There are 3 filters at the back of chassis that bring alarming signal, as well signals for the

outside power control.

The fan at the back side of unit performs the forced air cooling. Fan starts rotating, when RF

signal comes to the unit input.

2. Installation Guide.

2.1. Unit installation shall provide a proper air access to the unit; no obstacle for air is allowed

closer than 3” from fan.

2.2. Copper wires # 12 AWG shall be use in DC power line. Wires shall be crimp to ring

terminals.

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P5XXUH1 Power Amplifier User’s Manual 1. General Information. Power Amplifier (PA) is a AB/C-class unit. It is intended for amplification of single carrier phase (frequency) modulated (manipulated) narrowband signals. The working frequency range lays between 450 MHz and 512 MHz for UH unit. Code “xx” shows the input power range: Code: Range, W: R1 0.1-0.2 R2 0.2-0.5 R5 0.5-1.0 1 1.0-2.0 2 2.0-5.0 5 5.0-10 10 10-20 20 20-50 In the normal operating mode the minimum output power is 50 W.
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3. Operation Guide 3.1. Power supply voltage shall be in the range 13.8 V + 1.0 V. 3.2. The input power inside the working frequency range shall be within the listed above limits. It is prohibit applying any RF signal out of the working frequency range with a power, greater than 10% of the minimum rated one. 3.3. Green LED “DC ON” is on, when DC voltage is applied to the unit. 3.4. Red LED “LOW POWER” is on, when the output power drops below 80% - 85% of set level.