User's Manual Part 3

DSPbR Series – User’s Manual
Document Number 00000.B Page 56/75
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intenance\Restart Repeater
5.2.9 Logout
5.3
RF Gen + Aux Module - GPS, Ext/Internal 10MHz clock reference and Cell Modem options.
The Ref Gen + Aux module located at the rear of the DSPbR has a number of optional functions to assist in the
synchronisation of time-based functions when more then one DSPbR is used.
The Ref Gen + Aux module provides interconnectivity to and from optional signal reference sources such as
GPS and an external 10MHz signal.
GPS clock reference disciplining.
When a GPS signal is required to discipline the reference generator clock frequency, an active GPS antenna
must be connected to the GPS Antenna input where the output voltage on the SMA (F) connector is 6VDC
rated at 0.5A. An active GPS antenna option is listed under Chapter 10 - Ancillary Equipment and Spare Parts.
Once the active GPS antenna is terminated onto the SMA (F) connector, the DSPbR will sense its presence
and auto-activate the disciplining function. If the clock reference fails to respond to the disciplining then a minor
alarm will be raised.
The GPS receiver is not used to provide location information.
Ext / Internal 10MHz clock reference