Users manual
NR2316-OG
Revision #:
E
Date:
5/4/18
Page #:
18 of 50
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If a dual GPS/GNSS option is installed, the currently selected GPS PPS will be
noted with an arrow. This arrow indicates the actual source of the PPS. In addition, the
Active GPS will be noted with an arrow as well. The arrow will indicate switching to
backup in the case of failure of the primary, or loss of lock, as set in GPS Select setting.
2.9 GPS Select
The GPS Select screen is present on the NR2316 option with dual GPS/GNSS receivers.
This screen allows the user to specify which GPS Source is the primary output source for
the PPS and 10MHz outputs.
There are four settings, and these are the same as the serial command $GPS:
Setting
Description
Serial
Command
GPS 1
GPS 1 is used as output regardless of lock status or error
$GPS=0
GPS 2
GPS 2 is used as output regardless of lock status or error
$GPS=1
AUTO (1)
GPS 1 is default, if locked and no errors, else GPS 2 is used
$GPS=2
AUTO (2)
GPS 2 is default, if locked and no errors, else GPS 1 is used
$GPS=3
To cycle through the selections, use the SELECT button. To save, go to the Save
Configuration Screen, or use the serial $SAVEFLASH command. The default setting is
Auto (1).
The GPS Select setting also determines the output of the GPS/GNSS specific strings to
the serial RS232 and the SNMP GPS specific settings. The strings that follow the
specified GPS are the RMC, GNS, GSA, GSV, ZDA, and NVS (strings 7 through 11).