Simrad ES80 Reference Manual page 447

Description
A serial port is a serial communication interface
that is still very common between maritime
systems. It is very important that any serial line
between the ES80 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. If you do not
have a computer keyboard connected to your Processor Unit, select the
button to open an on-screen keyboard.
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
signalling 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 bit rate
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 serial communication.
The standard number of data bits defined for NMEA serial line communication is
8 (eight).
406273/C
Functions and dialog boxes
Keyboard
445