T
Thrane & Thrane
T
TT-3020B C p a ra
Capsat Transceiver
I
t l
o
l
Installation Manual
P g
Page 4
24
5
30MAY95
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
Heading and speed information
GLL
Geographic position, latitude and longitude
GGA
Global Positioning System fix data (includes time of position)
ZDA
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:
http://funk-an-bord.de
-- Page 27 of 42 --
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