Simrad TV80, Reference Manual

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Description
Serial ports are still a very common method for interface
between maritime systems. It is very important that any
serial line between the TV80 and any external system
is setup correctly with identical parameters at each end.
The NMEA (
National Marine Electronics Association )
standard for serial communication defines standard
parameters for such interfaces.
According to their web site, the National Marine
Electronics Association (NMEA) is "the unifying force
behind the entire marine electronics industry, bringing
together all aspects of the industry for the betterment of all
in our business". For more information, see:
http://www.nmea.org
Details
COM Port
This text box identifies the current communication port on the Processor Unit. You
can not change this information.
Name
This is a text box. Type a suitable name for the communication port.
Baud rate
Use this setting to specify the baud rate ("speed") for the serial communication. The
standard baud rate defined for NMEA serial line communication is 4800 baud.
In digital communications, symbol rate , also known as baud rate and modulation
rate
, is the number of symbol changes, waveform changes, or signaling events,
across the transmission medium per time unit using a digitally modulated signal
or a line code. The symbol rate is measured in
baud (Bd) or symbols per second.
In the case of a line code, the symbol rate is the pulse rate in pulses per second.
Each symbol can represent or convey one or several bits of data. The symbol rate
is related to the gross bitrate expressed in bits per second.
https://en.wikipedia.org/wiki/Symbol_rate
Data bits
Use this function to specify the number of data bits for the serial communication. The
standard number of data bits defined for NMEA serial line communication is 8 (eight).
Parity
Use this function to specify the parity for the serial communication. The standard
parity defined for NMEA serial line communication is "None".
Simrad TV80 Reference Manual