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.