Eclipse2 September 2012 sales@rftechnology.com.au E2-IP· PA500BH Amplifier Operation and Maintenance Manual This manual is produced by RF Technology Pty. Ltd. 46/7 Sefton Road, Thornleigh, 2120, Australia Copyright © 2012 RF Technology Pty. Ltd.
CONTENTS CONTENTS Contents 1 Operating Instructions 1.1 Installation Sub-rack Wiring Guidelines 1.1.1 1.2 Front Panel Indicators 1.3 Internal Adjustments 1.4 Amplifier I/O Connections 1.4.1 RF Input 1.4.2 RF Output 1.4.3 25 Pin Connector 1.4.4 RJ45 Ethernet Connector 4 4 4 5 5 5 6 6 6 6 2 Circuit Description 2.1 Amplifiers 2.2 Power Splitter / Combiners 2.3 Directional Coupler 2.4 Low Pass Filter 2.5 Power Control Circuits 2.6 RF Output Indicator 2.
CONTENTS A Engineering Diagrams A.1 Functional Diagrams A.
1 OPERATING INSTRUCTIONS 1.1 Installation WARNING Changes or modifications not expressly approved by RF Technology could void your authority to operate this equipment. Specifications may vary from those given in this document in accordance with requirements of local authorities. RF Technology equipment is subject to continual improvement and RF Technology reserves the right to change performance and specification without further notice.
1 OPERATING INSTRUCTIONS 1.3 Internal Adjustments 1.2 Front Panel Indicators PWR LED The power (PWR) LED shows that the dc supply is connected to the amplifier. RFO LED The RF output (RFO) LED indicates that the amplifier is being driven and there is forward RF power present at the output. ALARM LED The alarm (ALARM) LED illuminates if the internal temperature rises above safe limits or high reverse power is present, output power is automatically reduced in order to protect the amplifier. 1.
2 CIRCUIT DESCRIPTION 1.4.1 RF Input The RF drive is delivered via the BNC connector. Input drive level is 2 Watts, the absolute maximum power that should be applied to this connector is 4 Watts. RF Output 1.4.2 The RF output signal is available from an N-type connector. The input/output impedance is 50 ohms. 1.4.3 25 Pin Connector The 25-pin “D” connector provides connection to ground and dc power. The pin connections are given in table 1. 1.4.
2 CIRCUIT DESCRIPTION 2.2 Power Splitter / Combiners No trimmer capacitors or inductors are used for input/output matching, the broadband design means no re-adjustment is required even if the frequency is changed from one end of the band to the other. The dc supply is fed to the amplifiers through resistors R166 and R167. This allows the current of each amplifier to be monitored. 2.
2 CIRCUIT DESCRIPTION Equipment Type Power Supply RF Source RF Load / Attenuator RF Power Meter Short Circuit 3. Field alignment procedure Key Specifications 13.8Vdc, 25A 2 Watt (eg. Eclipse2 Basestation) 50Ω, 100W, SWR<1.2:1 eg. calibrated detector and voltmeter N-type, 0Ω, 100W Short Table 2: Standard test equipment for the IP•PA500BH Power Amplifier 2.6 RF Output Indicator The forward power voltage is compared with a pre-set dc reference voltage by U23.
4 SPECIFICATIONS 4 Specifications 4.1 General Specification 4.1 General Specifications IMPEDANCE…………………………………………….. Input: 50Ω / Output: 50Ω OPERATION MODE……………………………………. FM / CW OPERATING VOLTAGE……………………………….. 12 Volts OPERATING FREQUENCY…………………………… 450 - 520MHz INPUT DRIVE……………………………………………. 2 Watts TYPICAL GAIN…………………………………………. 17 dB GAIN FLATNESS (440-520MHz)………………………. ±0.25 dB HARMONIC AND SPURIOUS ATTENUATION…….. -90 dBc (exceeds FCC requirements) MAX OUTPUT VSWR (100W OUTPUT)……………...
4 SPECIFICATIONS 4.2 Physical Configuration 4.2 Physical Configuration The power amplifier is designed to fit in an RF Technology sub-rack within a 19" rack frame. The installed height is 4 Rack Units (RU), or 178mm, and the depth is 350mm. The amplifier is 95.25mm or three Eclipse units wide. The amplifier uses an extruded aluminum heat sink with vertical fins. Heatsink temperature rise is typically 25C at 100W output. 4.3 Front Panel Indicators and Test Points 4.3.
4 SPECIFICATIONS 4.5 Antenna Impedance 4.5 Antenna Impedance Nominal load impedance is 50 Ohms VSWR 1.5:1 or better. The IP•PA500BH will operate with a VSWR of 3:1 at all phase angles. The forward power will reduce as reverse power rises above acceptable limits. 4.6 Output Power Nominally 50/100 Watts, adjustable from 1 to 120 Watts. Gain is typically 17dB. 4.6.1 Transmit Duty Cycle The transmitter is rated for 100% duty cycle (continuous operation) at 100W output for air temperature below 50C.
A ENGINEERING DIAGRAMS 4.10.2 RF Output The RF output signal is available from an N-type connector. 4.10.3 25-Pin Connector A 25-pin, D-shell (“D”') connector is mounted on the rear panel. It provides power connections only. The pin connections are given in table 1. 4.10.4 USB Connector A front-panel, Universal Serial Bus connector (Type A) provides fast configuration and firmware upgrades. A Engineering Diagrams A.1 Block Diagram • IP Attachment A.
