Cambium Networks cnReach N500, User Manual

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cnReach N500 User Guide
Technical Reference
phn-4673_002v000 (March 2018)
3-14
With 2 x Sync Ports the SyncPipe can be used to precisely trigger two co-located Access Points.
Note
If using a GPS device with a single 1PPS port, it’s possible to “daisy chain” the radios
together Pin2 – Pin2 and Pin4 – Pin4 so that both radios are triggered simultaneously.
End Point Specific Settings
When using MMS the End Point radio should always be set to Generate, irrespective of the Access
Point’s MMS setting.
cnReach Dual Radio Specific Settings
When using MMS with a cnReach N500 Dual Radio, the End Point radio that connects to an upstream
Access Point should be set to Generate and the Access Point that has downstream End Points
connected should be set to External;
the cnReach dual radio configurations have internal MMS circuitry
between RF Modules that propagates the timing signal.
MMS Hop Offset
MMS Hop Offset is a crucial setting for MMS to operate effectively; it is this parameter that permits the
frequency/channel separation between the radios in the MMS Network.
The MMS Hop Offset should be set so that each of the sub-networks operate on a different channel in
the hop table. For example, if there are 20 channels in the hop table (DTS: 884 BPSK upwards), setting
the first radio to “0” and the second radio to “1” results in the radios transmitting on separate channels
in the pseudorandom hop pattern.
The MMS Hop Offset should match between each Access Point and their connected End Points.