22 XLi IEEE 1588 Clock
997-01510-03, Rev. C, 12/12/2006
SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S
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Note: The IEEE 1588 card configured as a PTP slave relies on TAI as the time scale of the PTP master.
Distributing non-TAI time over PTP while the PTP slave is a reference source will have a predict-
able effect on the XLi’s system time.
Note: Later on, when reconfiguring the IEEE 1588 card as a PTP master, use F119 to set the GPS
receiver as the PRIMARY reference source. (In F119: Set GPS TIME REFERENCE, BAY 1 to
PRIMARY.)
Note: For XLi IEEE 1588 Clocks with the second IEEE 1588 card in Option Bay 2 (preconfigured a PTP
slave, configure the network settings, PTP SYNC INTERVAL, PTP BURST MODE, and PTP
SUBDOMAIN. The factory settings are the same as for the PTP master, except the static IP
Address is 010.048.000.105 and Clock Configuration is Slave Primary.
Rack Mounting the XLi
The XLi comes with the following parts needed to mount the XLi securely in any EIA standard 19-inch
(48.26-cm) rack:
• 2 mounting brackets
• 4 flat-head, Phillips screws
Have the following items ready and available:
• The appropriate AC source to connect to the XLi’s power supply.
• A #2 size Phillips bit screwdriver
To rack mount the XLi:
• Unscrew the four phillips-head screws from the front end of the side panels.
• Use the same screws to attach the rack mount brackets, as shown.
• Tighten the screws using a #2 size Phillips screwdriver.
• Position the XLi in any EIA Standard 19-inch (48.26 cm) rack system, and line up holes in the
brackets with the holes in the rack.