Garmin 23 Owner's Manual And Reference Manual

Also see for GA 23: Specifications

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Garmin 23 Owner's Manual And Reference Manual Manual pdf 14 page image

127. If the beacon signal is received, but no DGPScorrection data is included, the message “NoData” will appear at the bottom of the page.If no beacon signal is received, the “SNR” fieldwill remain blank, “No Status” will appear at thebottom of the page.8. To select another beacon transmitter, enter a newfrequency and bit rate.9. Some Garmin units have a list of the last fivebeacon frequencies used on the Beacon LogPage. As an alternative to reentering frequencyand bit rate information each time you use theGBR 23, you may select a beacon from this list.(NOTE: The Beacon Receiver Setup Page willautomatically default to the last beacontransmitter used each time the GPS unit is turnedon.)10.Select the Satellite Status Page. A “D” willappear at the bottom of the signal strengthbar for each satellite with a correspondingdifferential correction or “3D Differential” will bedisplayed at the top of the satellite page. Thispage is useful for determining the quality ofdifferential coverage available. (Remember, themore satellites with corresponding differentialcorrections, the more accurate your position willbe.) Some models will show a distance from theDGPS tranmsitter only if this information iscontained in the DGPS signal.OperationUsing theGBR 23The Main Menu Page on theGPSMAP 130/135/175/180/185/230/235. Select‘Input/Output’ to make thedesired interface settings.From the Input/OutputSettings Page, select ‘RTCMIn/NMEA Out’ to properlyinterface with the GBR 23.Additional manual tuning for the GBR 23If your GPS does not support a tuning interface forthe GBR 23 and you wish to manually tune it, transmitthe following tuning sentence, based on NMEA 0183ASCII (pg. 19), through a PC terminal program or othercompatible source to the DATA IN of the GBR 23:$PSLIB,<1>,<2><1> Beacon tune frequency 0.0 (Auto), 283.5-325kHz in 0.5 kHz steps.<2> Beacon bit rate 0 (Auto), 25, 50, 100, 200 Carriage Return, Line FeedExample: $PSLIB,305.0,200