Configuration options for TDD synchronization Chapter 2 Planning considerations
phn-1115_006v000
2-26
Sep 2010
Single link configuration with PTP-SYNC
Each link requires one PTP-SYNC unit connected to the master ODU and one
compatible GPS receiver. Use this configuration where a site contains only one TDD
master ODU. The GPS receiver can be replaced by an alternative compatible 1 Hz
timing reference (Figure 2-9).
Th
e wireless
configuration settings are:
• Master Slave Mode = ‘Master’.
• TDD Sync Device = ‘PTPSYNC’.
• Cluster Master Slave = ‘Cluster Master’.
• PTP Sync Site Reference = ‘GPS/1PPS External’.
Figure 2-9 TDD synchronization configuration – single link with PTP-SYNC
PIDU
LANODU
ac in
Mains
supply
Customer
LAN
PTP-SYNC
GPS/
SYNC IN
PIDU
IN
ODU
OUT
SYNC
OUT
Ground cable
Outdoor CAT5e cable: gel-filled,
shielded with copper-plated steel
CAT5e cable: foil or braid
screened, with screened
connectors
CAT5e cable: unscreened
Drop cable
from ODU
Drop cable
from GPS
receiver
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