Using the Time Machines TM2000 PTP Clock

Using the Time Machines TM2000 PTP Clock

The Time Machines TM2000 is an inexpensive GPS clock that provides PTP for AES67 systems.

Things to know:

The latest version of Time Machines hardware is what will work. This is the TM2000B, with a serial number starting with D.

This clock will only provide PTP reference after it has locked to GPS.

Use the TM2000B firmware version 0.6.6. 

You can download the Time Machine firmware here.



PTP Version - MUST be 2.0 and not 2.1 (if using 2.1, there should be a checkbox for setting to 2.0 sync settings)
Packet Output - Use IPv4 UDP
Update Method - One Step is most precise. However your receiver must be able to see 4 GPS satellites before the clock will output PTP packets. If you cannot get lock from 4 satellites, you can use 2 Step.
Delay Method - End to End
Domain Number - In most systems, this will be 0. This setting should match the domain number set in Navigator.
Priority 1 - 128
Priority 2 - 128
Transmission - Multicast
Post-Holdover Behavior - Clock Class=52
DSCP Port 319 - 0
DSCP Port 320 - 0
Time Stamping Source - Hardware (GPS)
Multicast TTL - 1
Log Announce Interval - 1
Log Sync Interval - -3
Log Min Delay Request Interval - -2
Log Min PDelay Request Interval - -2

The 802.1AS Configuration and Power Profile Configuration can be left at the defaults.

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