Specifications; Frequency And Time Deviation Monitor (87-8023); Introduction - Symmetricom XLi User Manual

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Specifications

Frequency
1
Code
Tracking
Position Accuracy
TRAIM Mask
XLi 1 PPS Accuracy
Antenna input
Antenna Power
CPU-Aware
Related topics:
• "Installing the GPS Antenna" on page 19
• "XLi with a GPS Reference" on page 30
• "XLi with two optional GPS receivers" on page 30
• "F50 – GPS Receiver LLA/XYZ Position" on page 75
• "F51 – GPS Antenna Cable Delay" on page 77
• "F60 – GPS Receiver Satellite List" on page 81
• "F69 – Time Mode" on page 89
• "F73 – Alarm Control / Status" on page 94
• "F74 – Clock Source Control" on page 107
• "F119 – GPS Receiver Configuration" on page 154

Frequency and Time Deviation Monitor (87-8023)

Introduction

The Frequency and Time Deviation Monitor (FTM) option is specifically designed for power utilities to
monitor power line stability. When installed in a Symmetricom XLi, this option samples one phase of the
50 Hz or 60 Hz frequency supplied from the user's power line and provides frequency and time
information. The XLi outputs the frequency and time information on the XLi's front panel display, via FTP,
through the XLi's command line, and through the FTM RS-422 display driver port.
Use F123 to configure and view the status of the Frequency and Time Deviation Monitor (87-8023)
option card. See "F27 – FTM III Configuration" on page 63.
The FTM provides an accurate measurement of the local line frequency relative to the XLi reference
frequency. The results of this measurement are reported as System Frequency and Frequency Deviation
from nominal.
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1575.42 MHz (L1 signal)
Coarse Acquisition (C/A) code
Up to 12 satellites with TRAIM
Typically < 10m when tracking four (4) satellites
1 μS
±30 nS RMS UTC (USNO), 100 nS Peak (99%)
Female BNC
20 mA – 220 mA, +12 V
Yes
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XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
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