User's Manual

TRL TECHNOLOGIES, INC. FCC ID: OEUHPA460M250W
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POWER SERIES 1
250W 450-470MHZ RF POWER AMPLIFIER
USER MANUAL
1. GENERAL DESCRIPTION
The Power Series 1 250W, 450-470MHz Power Amplifier is a high power amplifier (PA)
that incorporates LDMOS technology to provide high efficiency and rugged operation. It
is developed for paging or trunking application. The PA features various alarms and
protection circuitry, Automatic Level Control (ALC) and cooling fans.
2. INSTALLATION
Make sure the PA’s output port is appropriately terminated before applying any
RF input signal.
Connect the RF input signal to the PA’s input port labeled RF IN. Connect the PA’s
output port labeled RF OUT to the optional RF Bypass Relay Module or an antenna.
Connect a DC power supply source to the connector labeled + -. Apply the required DC
voltage (26-28V, 810W). After going through an initialization state, the PA’s DC
POWER LED (green) and RF INPUT LED (red) should be on. Apply the RF input
signal (25-50W, 450-470MHZ). RF INPUT LED should turn off. TX ON LED (green)
should turn on. The PA is now transmitting. Monitor the RF output. Adjust the RF
output level, via the Power Out Adj pot from the front panel for 250W.
3. SPECIFICATIONS
Electrical
Frequency Range: 450-470 MHz
Output Power: 250 Watts (max)
RF Output Power Dynamic Range: 3dB (min) (125 Watts)
ALC Settling Time: 100ms max to within ± 1dB of final value
Input Power: 25 Watts (min)
35 Watts (nominal)
50 Watts (max)
Input Return Loss: -14.0 dB (max)
Harmonics & Spurious: -70dBc (max)
Stability: Under 3:1 VSWR
DC Supply Voltage: 26-28 V
Input DC Power: 810 Watts (maximum)