Symmetricom XLi IEEE 1588 User Manual
18
XLi IEEE 1588 Clock
997-01510-03, Rev. C, 12/12/2006
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VSWR, and input impedance also affect system performance. Symmetricom recommends using the
standard 12-volt capable antenna and cable provided with the GPS receiver.
standard 12-volt capable antenna and cable provided with the GPS receiver.
Figure 4: GPS Signal Strength Requirements
Connect the GPS antenna cable to the GPS receiver’s ANTENNA connector at the rear of the XLi.
Note:
Use a 12-volt capable GPS antenna.
Making Additional Connections and Powering Up
Make the following connections to the XLi (all cables supplied):
1.
For access to the web and command line interfaces, connect NET network port (on the Main CPU
Card, 87-8000) to the LAN using the Cat 5 network cable (supplied).
Card, 87-8000) to the LAN using the Cat 5 network cable (supplied).
For local access to the command line interface only, connect the SERIAL I/O port (on the Main CPU
Card, 87-8000) to the to the PC’s serial port using a null modem cable.
Card, 87-8000) to the to the PC’s serial port using a null modem cable.
2.
Connect the 1588 network port to the timing network.
3.
Connect the AC Power Supply it to a power source. The green STATUS light on the power supply
indicates that the XLi is receiving power.
indicates that the XLi is receiving power.
Upon receiving power, the XLi goes through its startup sequence; displaying “BOOTING”, “LOAD-
ING”, and “STARTING”. After approximately 40 seconds, the XLi displays the clock status, and user
interfaces (front panel/command line) become available. The IEEE 1588 card requires an additional
2 minutes to complete its startup sequence before it is available from the user interfaces.
ING”, and “STARTING”. After approximately 40 seconds, the XLi displays the clock status, and user
interfaces (front panel/command line) become available. The IEEE 1588 card requires an additional
2 minutes to complete its startup sequence before it is available from the user interfaces.
Warning:
Ensure that a disconnect device, such as a switch, with the appropriate voltage/
current rating is provided when operating/installing the XLi.