Both antenna cables must be the same length!
Timing is a very important aspect of the dual antenna lock and identical cable lengths will ensure that signal
propagation delays do not cause unreliable dual lock.
Satellite Elevation Mask
This feature can be used to improve GNSS signal quality when nearby obstacles like trees and building are reflecting or
temporarily obscuring the signal from satellites at low elevation. Raising the mask will cause the GNSS engine to ignore
satellites below the mask angle, so must be used carefully as it also reduces the total number of received satellites.
The elevation mask angle can be changed in VBOX Setup and by using VBOX Manager.
GNSS Coldstart
A GNSS coldstart may be required when:
• The GNSS engine has locked up.
• VBOX is struggling to acquire satellite lock.
A GNSS coldstart forces the GNSS engine to reset its downloaded almanac of current satellite positions. This can be
useful if the VBOX 3i is having trouble locking onto satellites, which typically occurs if the VBOX 3i has not been used for
several weeks or if it was last used a long distance (over one thousand miles) away from the current location.
https://en.racelogic.support//Product_Info/VBOX_Data_Loggers/VBOX_3i_Range/VBOX_3i_User_Guide_(All_Variants)/02_-
_VB3i_GNSS_Antenna_Placement
13