F119 - Gps Receiver Configuration - Symmetricom XLi User Manual

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To specify a unique option bay, append the character "B" and the bay number. For example, enter:
F118 B1<CR>
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XLi responds:
F118 B1 GPS RECEIVER
F119 – GPS Receiver Configuration
Summary
Use function F119 to select a specific GPS receiver, display its status information, and configure it as a
reference source.
F119's functions apply to all models of GPS receiver option cards available for the XLi. Where
differences exist, this manual refers to the card by its name and part number.
In F119, a GPS receivers are identified by number of the option bay where they are located. See
Figure 1 on page 3 for a diagram of the option bay numbers.
F119 provides the following GPS receiver information and status:
• Availability (indicates the option bay location)
• Part Number
• Software Version
• FPGA Number
• GPS Status (Locked or Unlocked)
• GPS Antenna (Ok, Open, or Short)
• GPS Acquisition State (Dynamic Mode, Stop Site Survey, Stop TRAIM, Start Site Survey, Start
TRAIM, Survey Position, Position Hold)
• GPS Time Reference (Primary, Secondary, or Standby)
Each of F119's information, status, and configuration items are explained below. Because F119 is an
important function, this section explains the behavior of F119 and related functions in some detail.
Part Number, Software Version, and FPGA Number
This information is useful for identifying the option card.
GPS Status (Locked or Unlocked)
During normal operation, "Locked" means the GPS receiver has:
• A valid GPS solution (the position of the antenna)
• The current UTC time (the current UTC leap second data)
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XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
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