Operation - Symmetricom XLi User Manual

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• The FTM card
• Mounting screws
Warning:
Dangerous voltages are present which can cause electric shock that could result in
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severe injury or even death. Disconnect all power before installing this option!
The only equipment required for installation is a Phillips screwdriver.
Prior to installing the FTM Card, check the XLi's Software Version Number using F18. See "F18 –
Software Version Request" on page 62. The version must be 1.80 or later to use the FTM card. If a
firmware upgrade is required, contact Symmetricom Customer Assistance.
FTM card installation requires inserting the FTM Card into the lower of two empty option bays in the XLi.
You may need to move other cards to clear the two option bays.
Remove the cover plates from the two option bays and save the screws. Slide the FTM card into the
guides on the side rails of the lower slot. Firmly press the card so its connector engages the Bus
Backplane. Secure the FTM card using the previously saved screws.
The FTM card will be recognized and enabled by the software upon power-up. Attempting to access
FTM card functions without the FTM card installed will produce an error message.
After powering-up the XLi, check the FTM card's line frequency setting to ensure it is set to the local line
frequency. The factory configuration for line frequency is 60 Hz. The default line frequency value remains
the same from one power cycle to the next, unless changed by the user.

Operation

The FTM begins operation after XLi power-up and runs continuously whether or not data is being
accessed by the user. All configuration information is stored in non-volatile memory and is reloaded
automatically on power up. Even though the FTM starts operating on power-up, line frequency and time
deviation measurements aren't in specification until the XLi has locked to its timing source.
The user can initialize and format the FTM card's data output to the serial port, network ports, and front
panel display.
After powering-up the XLi, check the FTM card's line frequency setting to ensure it is set to the local line
frequency. The factory configuration for line frequency is 60 Hz. The default line frequency value remains
the same from one power cycle to the next, unless changed by the user.
Connect a line voltage must to the FTM Male CEE-22 input connector. Refer to the input specifications
for the acceptable voltage and frequency range before connecting to this input.
After the XLi has locked to its timing reference source and is in specification, enter a value of zero (0) for
Time Deviation Preset to remove the time deviation accumulated during synchronization to the XLi's
timing reference source.
The FTM can be configured and monitored using the command line interface (available from the XLi's
serial and network ports), or using the XLi front panel keypad.
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XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
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