7700 MultiFrame Manual
7707GPS-DR GPS Fiber Data Transceiver
7707GPS-DR-10
Revision 1.1
4.3.
SRCA AND SRCB GPS SIGNAL SOURCE SELECTION (7707GPS-DR)
To support the redundancy features of the 7707GPS cards, a number of options to select the GPS
timing source output are available on the 7707GPS-DR card-edge or through
Vista
LINK
®
. These are
accessed through the SRCA and SRCB options. There are four possible combinations outlined below:
Legend:
PPS Pulse and RX Lines (GPS->MSC):
TX Serial Line (MSC->GPS):
4.3.1. Combination 1 Source Selections:
SRCA = GPSA, SRCB = GPSB
Comments: The default configuration; each GPS head is operational.
4.3.2. Combination 2 Source Selections:
SRCA = GPSB, SRCB = GPSA
Comments: The swapped configuration; all signal paths between GPS heads and
5600MSCs are swapped.
GPS Head A
GPS Head B
5600MSC A
5600MSC B
GPS Head A
GPS Head B
5600MSC A
5600MSC B
