3.3.3.9 Manually Setting the GNSS Position
Note: This topic applies only to stationary applications, i.e. to Standard
mode, or Single Satellite mode.
The exact geographic position (location and elevation) of the antenna your SecureSync
unit—and thus its onboard GNSS receiver—is a major factor for SecureSync to calculate an
accurate System Time from the GNSS reference.
Note: The elevation (altitude) should be set in accordance with the World
Geodetic System 1984 (WGS84), not Mean Sea Level (MSL).
Normally, the onboard GNSS receiver will track and adjust the antenna position during the
so- called GNSS self survey , which is performed during initial commissioning of a
SecureSync unit, or when rebooting a unit after it had been powered down for some time
("cold start").
Depending on where your GNSS antenna is installed and thus, how good the reception is,
the self survey may be adequate for most applications.
Setting a Manual Position, however, i.e. manually applying your current geographic pos-
ition data (Latitude, Longitude, and Altitude) may be necessary if your GNSSreceiver
could not complete its survey due to poor reception.
In some cases, setting the position manually may also help to reduce the amount of time
needed for the initial position "fix", i.e. for SecureSync to synchronize with the satellites in
view.
Note that this position will also be used if Apply A-GPS Data is checked.
To manually set your position:
1.
Determine your geographic position. For more information, see "Determining Your
Position" on the next page.
2.
Navigate to INTERFACES > REFERENCES: GNSS0. In the GNSS0 status win-
dow, click Edit in the lower left corner. The GNSS0 window will open:
3.3 Managing References
CHAPTER 3 • SecureSync 2400 User Manual Rev. 2
219
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