TM-CLK Clock Module

The TM-CLK Clock Module provides an Oven-controlled Crystal Oscillator (OCXO) for use as a reference frequency for SyncE and 1588v2 precision time features. The OCXO is precise to +-2 nanoseconds (ns) with time accuracy +50 to -65 ns. The ExtremeXOS configuration selects the input to the clock module from a SyncE master port or a 1588v2 grandmaster clock. The TM-CLK module is required for SyncE on the X460-G2. The 1588v2 Precision Time feature on the X460-G2 requires the TM-CLK module and the Network Timing Feature Pack, and does not support stacking.

Two mini-BNC outputs deliver the following signals:

10MHz frequency reference
1 PPS signal at the top of each second

Caution

The clock module is not hot swappable. You must power down the switch before installing any VIM modules.

Note

The TM-CLK module has no inputs for timing signals, and it cannot act as a 1588v2 grandmaster clock. The module provides no RJ45 Building Integrated Timing System (BITS) output, and in particular does not provide the serial time of day output.

Note

The X460-G2 TM-CLK clock module does not accept both 10MHz and 1PPS signals at the same time, so it can take 10 to 20 minutes or more to lock onto a 1588v2 1PPS signal from the Apollo2 chip in addition to the usual 15 minutes or more for the 1588v2 servo to lock onto the remote grandmaster clock.

TM-CLK Module Option