Crescend Technologies LLC UHFP10XXUL1 사용자 설명서

Copyright Crescend Technologies 

2 

Rev O 

 

1.1. INTRODUCTION 
 
This manual contains information and procedures for installation, operation, and general 
maintenance of Crescend’s UHF Continuous Duty Power Amplifier.  

 
The Crescend Technologies UHF RF power amplifiers are designed for trunking and conventional 
repeater applications.  Rack mountable and designed to accept a range of input powers for a given 
rated output power, the amplifier covers a broad range of frequencies.  Closed loop power control 
is used to maintain a constant output power under varying voltage, signal input, frequency and 
output load conditions. Several design features work to protect the amplifier under adverse 
conditions. 
 
The amplifier front panel includes status LED indicators for DC and Alarm conditions.  RF Input, 
RF Output, DC, summary alarm and power cutback connections are found on the back of the 
amplifier.  A fan is used to cool the amplifier. 
 
Table 1-1. Amplifier Functional Specifications 
 

Frequency Range: 

403 – 470 MHz 

Operating Voltage: 

+13.8 ±0.7 Vdc 

Current Consumption: 

See Table 1-2 

Duty Cycle: 

100% 

Power Input: 

See Table 1-2 (Range Set at Factory) 

Power Output (Single Carrier Operation): 

See Table 1-2 (Set at Factory) 

Power Output Change (Relatively set up value) + 1 dB (Maximum) 

Input Return Loss: 

-10 dB (Maximum) 

Spurious & Harmonics: 

- 65 dBc (Maximum) 

Input/Output Impedance: 

50 Ohms (Nominal) 

Load VSWR Tolerance: 

VSWR Protected above 3.5:1 (Nominal) 

Input/Output Connector: 

Type N Female 

Vertical Mounting: 

7.0 in 

Horizontal Mounting: 

19.0 in 

Weight: 

10 lbs (4.6 kg) (Nominal) 

Cooling Method: 

Fan Forced Air Over Heat Sink 

Operating Temp. Range: 

-30°C to +60 °C 

Storage & Transport: 

-40 °C to +70 °C 

Humidity: 

80% at +40 °C (Non-Condensing) 

Altitude: 

10,000 Feet (Maximum) 

Front Panel Display: 

INDICATORS 
DC ON (Green), LOW OUTPUT (Red), HIGH 
VSWR (Red), OVER TEMP (Red) 

Alarm and Control Pins: 

SUMMARY ALARM 
Summary of Low Output, High VSWR, Over Temp 
Alarms 
CONTROLS 
CTRL(Partial Power Cutback) 
SH/D (External Power Control)