Crescend Technologies VHFP15XXFF1 Users Manual

INSTALLATION AND SERVICE
MANUAL
CONTINUOUS DUTY
VHF POWER AMPLIFIER
Crescend Technologies 920 E. State Parkway Schaumburg, IL 60173
Copyright Crescend Technologies Rev B
Tel: 847 908 5400 Fax: 847 908 5408 Email: sales@CrescendTech.com Web Site: www.CrescendTech.com
GENERAL DESCRIPTION
Warning! Changes or modifications not expressly approved by the party
responsible for compliance could void the users’ authority to operate the equipment.
Compliance
subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
1.1. INTRODUCTION
This manual contains information and procedures for installation, operation, and general maintenance of Crescend’s VHF Continuous Duty Power Amplifier.
1.2. PRODUCT DESCRIPTION
The Crescend Technologies VHF 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: See Table 1-2 (Range Set at Factory) 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 (Range Set at Factory) Input Return Loss: -10 dB (Maximum) Spurious & Harmonics: See Table 1-2 Input/Output Impedance: 50 Ohms (Nominal) Load VSWR Tolerance: VSWR Protected above 2.5:1 (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:
This device complies with part 15 of the FCC rules. Operation is
INDICATORS
Copyright Crescend Technologies 2 Rev B
Alarm and Control Pins:
DC ON (Green), LOW OUTPUT (Red), HIGH VSWR (Red), OVER TEMP (Red)
SUMMARY ALARM
Summary of Low Output, High VSWR, Over Temp Alarms
CONTROLS
CTRL(Partial Power Cutback) SH/D (External Power Control)
Copyright Crescend Technologies 3 Rev B
Table 1-2. Frequency Ranges, Input/Output Power, Current, Spurious and Harmonics
Typ
Frequency
Range (MHz)
136-144 (DA) 144-152 (DB) 152-162 (EA) 162-174 (EB)
NOTES:
All specifications above apply at +13.8 ± 0.1 VDC operating
Input Power
Range (W)
0.1-0.2
0.2-0.5
0.5-1 1-2 2-5
5-10 10-20 20-50
Manufacturer’s Rated Output Power of this Equipment is for Single Carrier Operation.
voltage, ambient temperature of 25°C ± 5°C.
Rated Output
Power (W)
80 (P8) 100 (P10) 110 (P11) 150 (P15)
Current
(A)
16 18 22 26
Max
Current
(A)
19 23 25 28
Spurious
and
Harmonic
s (dBc)
<
-65 <-65 <
-65 <-67
Copyright Crescend Technologies 4 Rev B
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