User's Manual Part 2

DSPbR Series – User’s Manual
Document Number 00000.B Page 23/75
Ther
e are two versions of the CSC module, “master” and “slave”. The fundamental difference being the master
CSC has a single RJ11 connector to facilitate connectivity into the inter sub rack CAN bus. The slave CSC
module has two RJ11 connectors to facilitate daisy chaining should additional sub rack frames require
connection.
The master CSC has an onboard back up battery, which provides power to the processor and cell modem to
enable the sending of an appropriate alarm. The processor stores system configuration files and is able to
restore previous configuration settings to a newly plugged in module.
This battery is connected or disconnected via the web browser interface. Whilst connected, the battery is
conditioned through an intelligent charger. The internal battery is hardwired into the module and does not
require field maintenance or replacement.
3.3.4 Ref Gen + Aux – Reference Generator Module
Located at the rear of the rack on the extreme right hand side (looking at the back of the rack from the rear), the
Ref Gen + Aux module is not optional. The Ref Gen + Aux module provides interconnectivity to and from
optional signal reference sources such as GPS and an external 10MHz signal.
When a GPS signal is required to discipline the reference generator clock frequency, an active GPS antenna
must be connected to this input. The output voltage on this connector is 6VDC rated at 0.5A
The “EXT REF” SMA Female connector is used to lock the reference generator to an external 10MHz
reference. The required stability of this reference is +/- 3PPM with a nominal input signal level of 0dBm (0.22V
Figure 6 – CSC Controller