Using The Aux Port - NorthStar 972 Installation Manual

connection to the computer. A number of PC application programs can be used for waypoint/route
loading, charting programs, data logging, etc.
After checking that the desired port is outputting the correct data:
1. Press STAR to display the
options...
2. Press the cursor pad to select the RS-232 Port Setup line.
3. Change the
EDIT, then pressing the cursor pad to change the selection, then pressing ENTER.
The unit will now copy and output the specified port's data format through the
RS-232 port to an external device.
4. To set the baud rate for the RS-232 port, press the cursor pad down to select the
RS-232 Baud rate. Press EDIT, use the cursor pad to choose the baud rate, and
press ENTER.
NOTES:
Using the "PORT OFF" setting
Use this setting to reduce the loading on 972's the processor when you don't need the RS-232 port's
input or output functions.

Using the Aux Port

The 972's Aux Port is used to connect with the optional 491 echo sounder, or for transferring the
database of routes and waypoints between the 972 and many older Northstar units.
To wire the Aux Port for transferring waypoints see Figure 11 or Figure 12.
Pin connections are shown in Table 11.
972 Installation Manual, Rev. B
Options/Service Info
option to display
RS-232 setup
The RS-232 port may overflow (causing data loss) unless the port's baud
rate is fast enough to handle the specified sentences. The 972 may display
this precautionary message before you actually enter a new baud rate:
warning: all sentences may not transmit at diag baud rate. Press "enter" to
continue. In this case, select a slower output rate on the port setup screen
of the NMEA port being copied, or remove sentences, or increase the baud
rate.
You must configure the PC and its software with the appropriate settings.
SECTION SIX: Interfacing the 972 system
screen, then press Port setup
or
COPY PORT1 COPY PORT2
by pressing
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