User's Guide Part 2

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User Guide: PTP 600 Series Installation pages

phn-0896_009v003

Feb 2010

UNDER DEVELOPMENT

6-67

The data required to populate this screen is available in PTP LINKPlanner v1.4.

The TDD Synchronization screen provides the following controls:

TDD Sync Device

Select the timing device that is to be used for TDD synchronization.

Cluster Master Slave

Only displayed when TDD Sync Device is set to ‘PTPSYNC’.

Select the position that this ODU will occupy in the TDD synchronization cluster.

‘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

Only displayed when TDD Sync Device is set to ‘PTPSYNC’.

Select the timing reference source for PTP-SYNC. ‘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 726 to

2176 microseconds.

TDD Frame Duration

Select a value in the range 1730 to 6410 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 from the fundamental master/slave function. This change

allows more flexibility in selecting the location of master ODUs. 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). Two values: “Strict” and “Best Effort”. If a PTP 600 master ODU is

configured for a TDD Holdover Mode set to “Strict”, then it will not transmit when

synchronization is lost. On the other hand, a link configured for TDD Holdover Mode

set to “Best Effort” will synchronize when a reference signal is available, but will

otherwise use best efforts to operate in unsynchronized fashion.