Operations Manual

RF Technology PA50 Page 7
6 SPECIFICATIONS
TEMP LED on when the temperature rises above 90 degrees C. Q203 samples the line
output RF voltage to turn on the RFO LED.
6 Specifications
The PA50 is designed for use with the T50 exciter to provide 20 to 150 Watts output.
Output power regulation is performed by the exciter as it continually monitors PA
performance. The exciter also monitors important levels such as temperature, reverse
power and drain currents to keep them within operating limits.
6.1 Physical Configuration
The PA50 is designed to fit into a 19 inch rack mounted frame. The installed height is
4RU or 178mm and the depth is 350mm The amplifier is 125mm wide. An extruded
aluminium heatsink with vertical fins and an enclosed fan is used. The temperature rise
can be as high as 50 degrees depending on output power.
6.2 Indicators and Test Points
Power On Green LED
RF Power Yellow LED
Temperature 60 degrees + Red LED
Forward Power DB9 pin 8 and GND
Reverse Power DB9 pin 4 and GND
O/P Drain Current DB9 pins 2 and 5
Driver Drain Current DB9 pins 6 and 5
+28V DB9 pin 5
GND DB9 pin 1
6.3 Electrical Specifications
6.3.1 Power Requirements
Operating Voltage 26 to 30VDC ( available O/P power reduced below 26V )
Current Drain Approx 10A at 28V and 100W O/P
Polarity Negative Ground
Frequency Range PA50A25 to 32MHz
PA50B30 to 40MHz
PA50C38 to 50MHz