RaceGrade M GPS BL V2 User Manual - page 8
RaceGrade
Notes
7
decrease slightly. Keep this in mind when mounting on a
motorcycle as the bike leans from corner to corner.
•
Try to keep the antenna mounted on the centerline of the
vehicle. As with normal wheel speeds, during cornering the
speed of the inner side of the chassis is less than the speed of
the outer side of the chassis.
•
The antenna has a magnet base to hold itself onto a metal
surface. If you use double sided tape or hook & loop, when
removing please be careful not to remove the bottom silver
sticker from the antenna. This sticker has a metal film that help
reject false signals and shield it from noise.
•
Any extra antenna wire can be zip tied in a back and forth
bundle. Do not coil the extra antenna wire length in a circle
or wrap it around anything. Simply run the extra antenna wire
back and forth.
Loss of Signal
As mentioned earlier, the antenna must see as many satellites as
possible. The antenna should have a clear view of the sky, ideally a
clear line of sight to the sky down to 5 degrees above the horizon. If
part of the sky is blocked by a building, tree or bridge then the GPS unit
will loose track of those satellites being blocked. When this happens, a
reacquisition will take place which can take some length of time. Loss
of signal can occur when driving under bridges. The size of the bridge
and satellite location (time of day) has an impact on the acquisition of
satellites. You should always log your satellite count to be aware of
what the antenna saw while traveling around the race track.