Motorola PTP 500 User's Guide Page 322

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Task 8: Configuring wireless and telecoms interfaces Chapter 6 Configuration and alignment
phn-1115_006v000
6-40
Sep 2010
Table 6-6 Step 3: TDD Synchronization attributes
Attribute Meaning
Cluster Master
Slave
‘Cluster Master’ is the first ODU in the synchronization chain.
‘Cluster Slave’ is the second or subsequent ODU in the chain.
PTP-SYNC Site
Reference
‘Internal’ means standalone operation with no external timing
reference.
‘GPS/1PPS External’ means that an external GPS receiver will
provide a 1 pps timing reference.
Max Burst
Duration
The maximum duration of the burst opportunity. Select a
value in the range 1088 to 2176 microseconds.
TDD Frame
Duration
Select a value in the range 2283 to 4367 microseconds.
TDD Frame Offset The delay of the start of the TDD frame from the epoch of the
external timing reference. This permits the design of
synchronized networks in which the phase of the TDD frame
is independent of the master/slave function. Enter a value in
the range from zero to one microsecond less than the TDD
Frame Duration.
Slave Receive To
Transmit Gap
The duration of the gap between receive and transmit at the
slave ODU.
TDD Holdover
Mode
(Master only). ‘Strict’ means that the unit will not transmit
when synchronization is lost. ‘Best Effort’ means that the unit
will synchronize when there is a reference signal, but
otherwise will operate in unsynchronized mode.
TDD Holdover
Duration
(Master only). Default value 10 minutes, maximum 60
minutes. Specifies duration of holdover period following loss
of the external timing reference for TDD synchronization.
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