Symmetricom TimeProvider 500, User Manual

Page: 47 / 174

098-00172-000 Revision A – December, 2009 TimeProvider 500 2.0 User’s Guide 47
Chapter 2 Installation & Configuration
Configuration Setup
Figure 2-9. List of Current PTP-Related Settings
Possible Flow State , on page 65 shows several events related to PTP flow that can
be used to check on successful flow.
If the PTP flow is not as expected, here are some considerations:

Although it would likely require special user configuration, make sure the
grandmaster clock does not have its PTP port disabled. A disabled port will not
support PTP flow. TimeProvider 500 provides a similar setting (see the
set ptp
addr-mode command), but the port is enabled by default.

Although perhaps unlikely, it is possible that the grandmaster does not have
sufficient resources to support the requested PTP flow. For example, a
grandmaster has a limit on how many clients can be supported.
A quick check for PTP flow can be seen by looking at the 1588 connector's LEDs.
However, for a more reliable and detailed confirmation of PTP flow, use the
show
status query to observe the actual flow rate shown in the “Flow Direction” section of
the status response from the TimeProvider 500 as shown in Figure 2-9 . See Details
for Show Status Function , on page 63 for more information about the results of the
show status query.
Configure Frequency Outputs
By factory default, the TimeProvider 500 produces 2.048 MHz output and 1PPS
output. If this is the desired output, no configuration is needed.
The
show output
command identifies the current output configuration. The
following example shows that the TimeProvider 500 is currently generating 2.048
MHz clock from OUT1, OUT3, and OUT4 and a 1 PPS signal from OUT2.
TP-500> show status
Current Time : 21:51:38 11/09/2009 (UTC)
FLL state : Normal FLL [2840 min] Temperature
Reference : GM2 Avg : 41.01 C
Correction Freq : -10.12 ppb Min : 40.88 C
Phase : 0.00 ppb Max : 41.06 C
Output MDEV Estimate : 0.0002 ppb 5min : 55.37 mC
Residual Phase Error : 2377.13 ns 60min : 166.04 mC
Minimal RTD : 12.57 usec
--------------------------------------------------------------------------
Flow Direction : (GM to client) (client to GM)
GM1 (pkts/s): 0 0
GM2 (pkts/s): 64 64
Weight (%): 1.00 99.00
Transient free (/900): 900 900
Transient free (/3600): 3600 3600
Percentile Clustering(%): 99.8 99.8
Operational Min TDEV(ns): 2.7 1.8
Operational MAFE (ppb): 0.01 0.01
Min Cluster Width (ns): 100.0 100.0
Mode Width (ns): 100.0 200.0
--------------------------------------------------------------------------
Flow State : (GM1)Signaling (GM2)Normal
Clock id : (GM1)00:00:00:00:00:00:00:00 (GM2)00:B0:AE:FF:FE:01:31:65