Thrane&Thrane TT-3042D, Manual Manual, Page: 26 / 31

22 Operation Operation
1.5 1.5
Connectors Connectors
Page Page 66 7Jul98 7Jul98
The NMEA 0183 communication parameters are: 4800 baud, 1
stopbit and no parity.
Hint: To test the NMEA 0183 link the TT-3042D can be configured
to serial data input on NMEA 0183 port, see section 1.5.2, NMEA
0183 sentences should then be printed out.
2.1.14 NMEA 0183 Sentence Output
If the NMEA port is configured for NMEA 0183 input/output and
NMEA 0183 data is received the position and velocity
parameters are extracted and transmitted to the transceiver.
If on the other hand no data is received on the NMEA 0183 line
for a certain time the TT-3042D requests position and velocity
data from the transceiver. If the transceiver is equipped with an
internal GPS board and has updated position and velocity data
these data is transferred to the TT-3042D. The TT-3042D then
transmits position and velocity formatted as standard NMEA 0183
sentences on the NMEA 0183 port Tx line.
NMEA 0183 sentences output are: GLL, VTG and ZDA.
When using the NMEA 0183 output jumper W9 should be placed
in position 1-2 (low) to obtained a balanced signal.
2.1.15 Serial Print input
When configured for serial characters input on NMEA 0183 port,
jumper W2 and W9 must be in position 2-3 to obtain single-
ended RS-232 voltage signals.
The protocol is two wire Ready/Busy control. X2 pin 10 will go to
a positive voltage level when buffer is full to indicate Busy.
When printer is ready to accept data a negative voltage is output
on X2 pin 10.