User guide

Understanding Synchronization Link Characteristics

pmp-0229 (Mar 2013)

• Design 5

o A CMM provides sync to a co-located BHM or the BHM generates timing.

o This BHM sends the sync over the air to a BHS.

o This BHS delivers the sync to a co-located AP.

o This AP passes the sync in the additional link over the air to SMs.

This design is illustrated in Figure 31.

Figure 31: Additional link to extend network sync, Design 5

Wiring and configuration information for this sync extension is described under Wiring to Extend

Network Sync on Page 426.

All radios support the remote AP functionality. The BHS and the SM can reliably pass the sync

pulse, and the BHM and AP can reliably receive it. The sync is passed in a cable that connects

Pins 1 and 6 of the RJ-11 timing ports of the two modules. (The sync cable is described under

Cables on Page 57.) When you connect modules in this way, you must also adjust configuration

parameters to ensure that

• the AP is set to properly receive sync.

• the SM will not propagate sync to the AP if the SM itself ceases to receive sync.

CMM

-M-

-S-