If you have one of our NMEA 2000 gateways, you can observe the incoming signal
(500 milliseconds recording, updated twice per second) in the free CAN Log Viewer
software (see Section VI). To open the window with oscillograms (Figure 2), click the
“More…” button in the Outboard Gateway properties window (Section VI, Figure 1).
The red line in the window shows the signal as it is seen by the Gateway, the blue
line shows impulses detected by the Gateway. The «Signal Quality» in the lower right
corner is the assessment of AI of the Gateway (good values are in the range of 60-
100%). The «Received» progress bar shows how many points of the current oscillogram
were received by the CAN Log Viewer from the Device. The real time transmission of
oscillograms significantly loads the NMEA 2000 network, and we recommend turning
off AIS and chart plotters to increase the “Received” value. The window’s data can be
saved as spreadsheet or image with the “Save…” button.
The following steps help you setup your Gateway.
1. Tuning the signal level
Do not change factory settings at this step. If you bought a used device, we recommend
that you reset it (Section V.4). Run the engine at idle revolutions and check the Device’s
LED signals (see Section V). If the first signal in a sequence is RED, add one more turn,
because the signal is too weak (Figure 1.C).
If you can observe the signal in the CAN Log Viewer (Figure 2), its amplitude should be
90-100% and noises should be less than 30% of the window area height.
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