iGage
iG8 User Manual
37
Is there a UHF antenna attached to the Base and Rover?
Debugging Rover: FLOAT, DGPS, DGPS, AUTO
A Rover that will not ‘FIX’ is a very common issue. This section will help you determine what is wrong.
If you are configuring a UHF Rover, check the previous section ‘
Verify that the Base is Transmitting’
on page 36 to make
sure your base is transmitting UHF corrections.
On the Rover, from the main menu click on the ‘Equip’
tab:
Click on ‘7 Monitor Skyplot’, check the ‘Status’ on the
‘Quality’ tab.
Status = ‘FIXED’:
If the Status is FIXED, then the front panel of the iG8
receiver:
Will show ‘FIX’ (you may need to click a front panel
button to turn the display on.)
Great!
You are ready to survey.
The Base and Rover are properly configured and running,
the ‘Status’ is ‘FIXED’, the Hsdv and Vsdv should be low
and the Latency will be less than 3 seconds.
Your Base and Rover are properly configured and you are
ready to survey.
Status = ‘FLOAT’:
If the Rover reports ‘Float’ then the connection to the
Base (UHF radio or Network connection) is properly
configured and working. (This is great news!) Corrections
are being received, however the GNSS engine cannot
resolve ambiguities to fix the solution.
1.
If the Rover is FLOATing, but never fixes, the
programmed base position could be more than 100
meters from the actual base location. This happens
when any base setup method other than ‘Read GPS’
is used. If you got an error message like ‘Warning:
Base position is 100 meters distant from reading’
when setting up the base then your rover will never
fix.
In other words: ‘the entered Base horizontal and
vertical location must be within 100 meters of the
true base position.’
2.
Is the Base within 30 miles of the Rover position?
Extremely long baseline distances will keep the
Rover from fixing.
The distance is displayed on the ‘Ref’ tab of
Monitor/Skyplot.
There a chance that the rover is receiving
