TT-3020B Installation Manual - Polaris-as.dk

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Thrane & Thrane TT-3020B Capsat Transceiver Installation Manual 2.5.7.2 NMEA 0183 Transmission When you have a built-in GPS it is possible configure the Transceiver to send out NMEA 0183 navigational data so that devices connected to the Transceiver via the T-Bus connector will benefit from the GPS information. To use NMEA output you must set: SWITCH 1 OFF and SWITCH 3 ON The following four strings: VTG GLL GGA ZDA Heading and speed information Geographic position, latitude and longitude Global Positioning System fix data (includes time of position) Time and date are sent out when the Transceiver has a built-in GPS and it is in navigation mode. The time in the position strings and the Time-and-date string are always the same. The spacing between each block of data is 2 seconds and 0.5 seconds between GLL, GGA and ZDA strings when they are present. An example is: $GPVTG,000.,T,000.,M,00.0,N,00.0,K $GPGLL,5544.44,N,01228.64,E,121003,A $GPGGA,121003,5544.44,N,01228.64,E,1,04,1,37,M,,M,, $GPZDA,121003,19,02,1993,, The following three strings: VTG, GLL and GGA are sent out when the Transceiver has a built-in GPS but it is in aquisition mode and the currently stored position is less than 24 hours old. The time indicates that of the last known position. The course and speed are 8 second mean values. An example is: $GPVTG,180.,T,180.,M,01.0,N,00.0,K $GPGLL,5544.45,N,01228.67,E,121059, $GPGGA,121059,5544.45,N,01228.67,E,0,00,1,23,M,,M,, The following three strings: VTG, GLL and GGA are sent out when the Transceiver has a built-in GPS but it is in aquisition mode and the currently stored position is more than 24 hours old. The time field is empty. The course and speed are 8 second mean values. An example is: Page 24 30MAY95
$GPVTG,139.,T,139.,M,02.0,N,00.0,K $GPGLL,5544.45,N,01228.68,E,, $GPGGA,,5544.45,N,01228.68,E,0,00,1,0,M,,M,, Thrane & Thrane TT-3020B Capsat Transceiver Installation Manual An empty GLL string is sent out when there is no built-in GPS or before the GPS module has been started by the Transceiver. $GPGLL,,,,,, $GPGLL,,,,,, $GPGLL,,,,,, 30MAY95 Page 25
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Page 3: Safety Summary The following genera
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TT-3020B Installation Manual - Polaris-as.dk

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