Topcon HiPer V - Receiver Problems

Troubleshooting
ReceiverProblems
63
P/N:1001608‐01
–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sufficient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)
ReferenceManual).
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).
–Ensuretheelevationmaskislessthan15degrees.
–IncreasethePDOPthreshold.Todothis,ontheTRUmainwindow,chooseReceiverSettingsTrackingObs.
–Conductthesurveyduringatimeperiodwhensatellitevisibilityandgeometryisbetter(ifpossible).
• Themodembatteryislow.
• Thespecifiedbaudrateisincompatiblewiththebaudratesthemodemsupports.Thebaudrateisthe rateatwhichthe
receivertransmitsdifferentialmessagestothemodemandviceversa.
–Changethemodem’sbaudrate.
• TheBaseandRovermodemsusedifferentradiolinkparameters.
–ConfiguretheBaseandRoverradiomodemsaccordingtotheprocedureslistedintheTRUReferenceManual.
• ThedistancebetweentheBaseandRoveristoofar.
–ClosethedistancebetweentheBaseandRover.