User's Manual Part 4

DSPbR Series – User’s Manual
Document Number 00000.B Page 71/75
A: Via an RJ11 connector jumper cable from the CSC–Master to the CSC-Slave modules in the preceding
racks.
Q: Are the CSC-Master and Slave modules connected using the RJ11 jumper from the front of the sub rack
frame?
A: Yes. Only the CSC–Master has a single RJ11 termination connector. The CSC-Slave units have 2 x RJ11
connectors to allow for daisy chaining.
DSPbR Slot Architecture
Please refer to appendix “A” the section of the DSPbR User’s Manual, illustrating slot architecture configuration
possibilities.
Q: Is there a preferred order in which the slots are populated into the DSPbR
A: There is a preferred order for populating the available slots within the DSPbR. This is however dictated to by
whether the DSPbR has been configured to use either “internal” uplink or downlink RFBE output combining and
prepared for single or multiple channel operation.
Q: Will all slots take any module?
A: No. Not all slots accommodate any module. Slots 1 to 8 accommodate RFBE’s and Slots 9, 8 or 7
accommodate RFFE’s in that order and Slot 10 accommodates the DSP module. Slot 9 only accommodates
and RFFE module.
DSPbR Channel / Band Expandability
Q: Is it possible to expand past the single band 8-Channel configuration maximum of one DSPbR sub rack
frame?
A: Yes, a second, or third Slave DSPbR sub rack frame can be added to a Master DSPbR sub rack frame. This
is achieved by extending the CAN bus of the Master CSC Controller via a RJ11 terminated jumper cable
connector at the front of each sub rack frame. This in turn is daisy chained between the Slave CSC modules in
the respective extension sub rack frames.
Q: What minimum module configurations are required for the Master and Slave DSPbR sub rack frames when
utilising CAN bus extended connectivity?
A: Each band RFFE extended into the Slave sub rack frames must be duplicated within the respective sub rack
frames feeding the RFBE’s. The PSU, DSP and REF GEN modules are also duplicated within each sub rack
frame.
Q: When a slave (2nd DSPbR) unit is used to add additional channels to the first 8 channels on a DSPbR, does
the second unit have its own MAC address?