Chapter 3 ICS Command Reference
TDEV
250 SSU-2000 Technical Reference 12713020-003-2 Revision F.01 – January 2007
TDEV
Use this command to view Time Deviation (TDEV) information from the specified
input port.
Level 0 Not applicable
Level 1
TDEV xAy-z [{A|B}] startdate [starttime] [stopdate [stoptime]]
TDEV xAy-z [{A|B}] starttime [stopdate] [stoptime]
Use this command to display the TDEV information calculated on the
input modules. A|B specifies Clock A or Clock B. The default is the
selected clock output.
To perform a TDEV calculation, a start and a stop time are required. If
none are specified in the command line, the time defaults to the last 24
hours. If the stop time is not specified, the current time is assumed.
This command displays the returned TDEV values and the window sizes
for which they are valid. The command also displays the start and stop
time for TDEV calculation.
TDEV xAy-z [{A|B}] HISTORY [count]
A | B specifies Clock A or Clock B. The default is the selected clock
output. This command displays the one-day TDEV history for the last
one to 100 days.
Level 2 Same as Level 1 operation
Level 3 Same as Level 2 operation
Level 4 Same as Level 3 operation
Remarks Since TDEV is an intensive calculation, you can only specify one port.
Related None
RestrictionsNone
Note: If you specify times and dates, TDEV displays that occurred
after the starting date and time and before the ending date and time.
Specified dates have the format yyyy-mm-dd, and specified times
have the format hh:mm:ss.
Specified dates and times are not provided in ISO timestamp format,
and are separated by a space. Start time and stop time both default to
the current time of day. Stop date defaults to the current date. Start
date defaults to the current date, minus 24 hours.
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