Gps m12 receiver (87-8028-2), Introduction, Specifications – Symmetricom XL-GPS User Manual

Page 119: Introduction specifications

997-01530-01, Rev. C-25, Jan 2008

109

6: GPS M12 Receiver (87-8028-2)

Introduction

The optional GPS M12 Receiver acts as a Stratum 0 timing reference source to the XL-GPS Time and
Frequency System. It tracks up to 12 L1 GPS satellites, decodes their signals for time and position, and
feeds this data to the XL-GPS through the internal backplane. When available and enabled, the GPS
M12 Receiver card provides superior time and frequency accuracy on the XL-GPS (See

“Time and

Frequency Accuracy” on page 3

). The GPS M12 Receiver card comes with an L1 GPS antenna, cabling,

and mounting hardware unless otherwise specified at the time of purchase.

The GPS M12 Receiver uses a TRAIM (Time Receiver Autonomous Integrity Monitoring) algorithm to
monitor the integrity of the receiver’s timing solution. Using redundant measurements, TRAIM detects
and quarantines anomalous GPS signals, independent of the GPS health ephemeris data. The
quarantined signal is excluded from the timing solution for 12 hours before it is requalified for inclusion in
the timing solution.

For more information about the M12 receiver, visit

http://www.motorola.com/ies/GPS/

products_positioning.html

See

“Installing the GPS Antenna” on page 13

for information on selecting an antenna site, mounting the

antenna, and signal strength requirements.

The GPS M12 Receiver card can be managed and configured using

F53 – GPS Operation

Mode (page 55)

and

F119 – GPS Receiver Configuration (page 104)

Specifications