Humminbird ONIX Operating Manual page 202

Sensor Port Connections (GPS, RS-232, NMEA 0183)
When equipment is connected to the control head, the equipment and its data will be detected automatically. You can also manually
select data, set the data offset, baud rate, and NMEA output sentences from the Sensor Port submenus. The available menus are
determined by the attached equipment.
1. Press the HOME key.
2. Select Settings.
3. Select Network.
4. Under Sensor Port, select a port menu.
GPS Port: If you've connected an external GPS or an external GPS/Heading Sensor to the control head, select the GPS Port.
Use the GPS Port menu options to select the Sensor Type, Data Offset, and Pitch and Roll installation.
RS-232 Port, NMEA 0183 (1) and (2) allow you to change the data for Sensor Type, Data Offset, Baud Rate, and NMEA Output.
Sensor Type
Data Offset
Baud Rate
NMEA Output
NOTE: To set up a NMEA 2000 network, see Set up a NMEA 2000 Network.
Control Head Configuration
Auto-Select is turned on as the default setting, and the available data from the attached
sensor will be auto-selected with a check mark.
To change the selected data, turn off Auto-Select, and manually change the data by adding
or removing a check mark. (check mark = selected)
To adjust the zero point of the attached sensor, select Data Offsets. Depending on the
attached sensor, you can adjust the Depth Offset, Temperature Offset, Heading Adjustment,
and STW (Speed Through Water) Calibration from this menu.
For example, select Depth Offset to adjust the digital depth readout to indicate the depth
from the waterline or the boat's keel for the selected sensor.
Select a baud rate for the selected port. (Auto, 4800, 9600, 38400; Default = Auto)
Select NMEA Output sentences for the selected port. See the NMEA 0183 table on the following
pages.
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