NorthStar 941X Reference Manual page 37

Rev. D
The lower part of the screen shows three bar graphs:
1. SNR SNR The Signal to Noise Ratio (SNR) is a good overall measure of
SNR SNR
overall signal quality, and should be as high as possible. Values of
15 and higher are preferred, while anything below 10 could indicate
poor reception.
2. SIGNAL SIGNAL The actual strength of the received signal—should be as SIGNAL SIGNAL
high as possible. Varies with distance from beacon transmitter.
3. NOISE NOISE NOISE Noise level measures the "static" caused by lightning and NOISE
other atmospheric effects, and should be low for best results. See
"DGPS antenna mounting" on page 112, for further details.
NOISE LEVEL VALUE
200 or less
1,000 – 3,000
5,000 – 10,000
At the bottom of the screen a summary of DGPS operation is displayed.
You may see one of the following messages:
3 — Basic Navigation 3 — Basic Navigation
3 — Basic Navigation 3 — Basic Navigation
MEANING
excellent
typical at night
thunderstorm
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