Product Manual

Troubleshooting
ReceiverProblems
69
P/N:7010‐1004
–OrderanewOAFwiththerequiredoptionsactivatedtoenableorextendvalidityofthecorrespondingreceiver
options.
–RefertotheTopconReceiverUtility(TRU)OnlineHelpforadetaileddescriptionofoption s.
• Therearenotenoughcommonsatellites.Inordertoobtainafixedsolution,theBaseandRovershouldtrackatleast
fivecommonsatellites.
–Checktheelevationmasksofthe RoverandBasereceivers;theyshouldbethesame.Todothis,ontheTRU
mainwindow,chooseReceiverSettings
TrackingObs.
–Verifythereisaclearviewoftheskytoallowsuffic ientsatellitetracking.
• AdiscrepancyexistsbetweenthedifferentialstandardsusedattheBaseandRoverreceivers.
–EnsuretheBaseandRoverreceiversusethesamecorrectionsinput/outputformat:
a. ConnectthereceivertoacomputerandopenTRU(see“Connection”intheTopconReceiverUtility(TRU)
OnlineHelpembeddedinthesoftware).
b. InTRU,connecttothereceiver.
c. OntheTRUmainwindow,chooseReceiverSettingsPorts.
d. Double‐clickontheporttobeconfiguredandmakesuretheinputmodeoftheRovermatchestheformat
oftheBaseoutputmode(i.e.RTCM3).
• Poorsatellitegeometry(PDOP/GDOPvaluesaretoohigh).
–Conductthesurveywheresatellitevisibilityisbetter(lowPDOPvalue).
–Ensuretheelevationmaskislessthan10degrees.
–IncreasethePDOPthreshold.To dothis,ontheTRUmainwindow,chooseReceiverSettingsTrackingObs.
• Theelevationmaskisabove10degrees.
–Lowertheelevationmask.Todothis,ontheTRUmainwindow,chooseReceiverSettingsTrackingObs.
–Verifythereisaclearviewoftheskytoallowsuffic ientsatellitetracking.