Spectracom SecureSync User Reference Manual page 222

3.6 OTHER Setup Pages
4.
Enter the information in the fields displayed. See "The GNSS Reference" on page 202 for
additional information. The available fields are:
Receiver Mode : This is a drop-down list offering 3 choices:
Offset : The default value is 0 nanoseconds (resolution = 1 nanosecond).
Reset Receiver : Erase all GNSS data in memory (equivalent to a receiver cold start)
Delete Position : Delete SecureSync's GNSS position and initiate a GNSS Self Survey .
Manual Position Set : Manually set the position by entering Latitude, Longitude, and Alti-
tude. This position will also be used if Apply A-GPS Data is checked.
3.6.15.1 Selected Constellations
A choice of GPS and/or GLONASS , if Multi-GNSS licensing is installed. To check if this license
is installed, navigate to TOOLS > SYSTEM > Upgrade/Backup . Under System Configuration ,
the Option
Per default both GPS, and GLONASS will be enabled, in order to obtain as many satellite signals
as possible. Either selection can be disabled, but not both of them ( if both are turned off, no
changes will be saved and the last constellation setting will be preserved).
206
Standard : Min. 3 satellite signals required to determine position and time
Single Satellite : In this mode, SecureSync attempts to compute time in areas with
poor satellite reception (such as "urban canyons"). The user must enter the antenna
position under Manual Position Set (see below). The calculated time may be less
accurate, and less reliable than the time determined in "Standard" mode. (NOTE:
The minimum number of satellites depends on the GNSS receiver type installed in
your SecureSync).
: for non-stationary applications (e.g., marine)
Mobile
OPT-GNS Multi-GNSS will be listed.
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3 SecureSync User Reference Guide Rev. 18