User's Manual
1
P15XXUL1 and P15XXUH1
Power Amplifier User’s Manual
1. General Information.
Power Amplifier (PA) is an AB/C-class unit. It is intended for amplification of single carrier
phase (frequency) modulated narrowband signals.
Working frequency range lies between 403 MHz and 470 MHz for UL unit (P15XXUL1) and
between 450 MHz and 512 MHz for UH unit (P15XXUH1). 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 150 W.
Input VSWR is not greater than 1.7:1.
PA meets all FCC requirements to harmonic and spurious levels.
The nominal power supply voltage is 13.8VDC.
DC current consumption does not exceed 44A 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 10” 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 four # 6-32 screws: two for
“+” pole and two for “-“ pole.
There are 3 filters at the back of chassis that bring alarming signal, as well signals for the
outside power control.
Two fans at the back side of unit perform the forced air cooling. Fans start 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 fans and heatsink.