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997-01530-01, Rev. C-25, Jan 2008 1
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1: Overview of the XL-GPS Time and Frequency
Receiver
Product Description and Features
The XL-GPS Time and Frequency Receiver is high-precision time and frequency system that generates
time and frequency outputs from its GPS-disciplined system clock. When locked to Symmetricom’s
timing-optimized GPS receiver, the XL-GPS provides 1x10
-12
frequency output accuracy, and better than
30 nS RMS accuracy to UTC.
Two user interfaces are available for managing the XL-GPS:
• command line interface, available from the serial and network ports (using TELNET)
• keypad interface, available on the front panel of the XL-GPS
The standard configuration includes:
• 1U chassis
• GPS receiver
• Vacuum fluorescent display and a 19-button keypad
• 1 pulse/sec out (via rear panel BNC)
• RS-232 or RS-422 (via rear panel 9P D Male)
• Network Port 10/100 Base-T for TELNET and SNMP
• Rate Out 1/10/100 PPS, 1/10/100 kPPS, 1/5/10 MPPS (1 output via a rear panel BNC)
• IRIG B Time Code Out (AM or DC) (via a rear panel BNC)
• Alarm Open Collector (via a rear panel BNC)
• 90-264 VAC
An optional Expansion Module provides four female BNC connectors that are factory-configurable per
the sales order. The output configurations include:
• IRIG B AM
•IRIG B DC
•Alarm
• 1 PPS
• 1 kPPS
• 10 kPPS
• 100 kPPS