Symmetricom 5115A, Руководство по эксплуатации и обслуживанию

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62 7: Collecting and Viewing Data Remotely
To change where print jobs are sent, use the following variations of the set print command:
set print local
set print file
set print remote <hostaddr> <port>
These commands change print job destination to that indicated by their last parameter.
The last variation requires IP address and port number of a network printer that supports direct
transfer of information to the port, such as the HP JetDirect using port 9100. Other spooling
protocols such as the Internet Printing Protocol (IPP) are not supported at this time.
7.2.6 Configuring Data Sets from the Command Port
7.2.6.1 Pausing and Resuming Phase and Frequency Difference
The phase and frequency difference display can be paused using the command port connection.
When a data set is paused new measurements are recorded but not returned by the corresponding
show command or plotted by the user interface.
Use the pause command as follows:
pause phasediff (to pause updates to the one second phase difference data set)
pause freqdiff (to pause updates to the one second frequency difference data set)
To resume updates, issue the resume command with the same parameter value passed with pause
command. The show command will now return the current data set, and the user interface will plot
it.
7.2.6.2 Removing the Linear Trend
The phase difference cache supports measuring and removal of its linear trend. See “Chapter 5,
Removing the Linear Trend” on page 45 for conceptual details.
You can perform both functions on a command connection using the following commands:
measurelinear (to measure the current linear trend)
removelinear <on|off>
The on or off parameters to the removelinear command are equivalent to the Remove Linear and
Don’t Remove Linear softkeys in the graphical user interface. Note that this command affects the
plot in the graphical user interface.
The measurelinear command can be run regardless of whether the trend is currently removed or
not. The command may result in a message stating that there is no data to measure a trend with, if
the one second phase difference strip chart cache is empty at the time you issue the command.
7.2.6.3 Setting the Time Constant
You can set the Time Constant which controls the length of running average used to compute (f)
phase noise and Allan deviation using the following command:
set timeconstant <value>
Where the <value> parameter is set to:
„
0 (sets an infinite running average)
„
1 , 10 , or 100 (seconds)