Operating instructions

RF Technology PA501 Page 4

1 OPERATING INSTRUCTIONS

1 Operating Instructions

The PA501 is part of the Eclipse range of modular base station equipment. It is a

broadband power amplifier capable of continuously delivering 100 Watts of power in

the 400-512MHz frequency range. It is designed to complement the T500 transmitter,

and mounts in a standard Eclipse sub-rack.

1.1 Installation

There are no front panel controls requiring adjustment on the PA501. In normal

circumstances no alignment or setup is required. If mounted in a sub-rack that has not

previously been wired for a power amplifier, the rack connector must be wired

according to the guidelines in section 1.1.1 below.

1.1.1 Sub-rack Wiring Guidelines

When installing an Eclipse Power Amplifier in an Eclipse sub-rack, observe the

following guidelines for sub-rack installation:

• The sub-rack power supply must be capable of delivering the full current

requirements for all modules fitted in the sub-rack, typically 30 Amperes at 13.0

Volts for a complete repeater.

• Owing to the high current drain, power supply lines should be cabled to the power

amplifier separately and using heavy gauge wire to minimise voltage drop and

interference with the power supply to other modules in the rack.

• The ALC line from the power amplifier must be connected to the ALC input of the

exciter. If this connection is not correctly made, no control of the output power

level will be possible. This can result in excessive RF output power, and

consequent breach of licensing authority regulations, or possible overload of the

unit.

With an Eclipse T500, join pin 8 on the exciter and the amplifier.

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 a

ccordance 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.