Magellan GPS PROMARK X, User Manual

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Appendix ProMARK X
A-50
Appendix 11 SIGNAL QUALITY
Signal quality (SQ) is an indication of the carrier-to-noise ratio (C/N
O
) of
the signal of each satellite being used for a position fix. SQ has very little
affect on the accuracy of the position fix; it is only an indication of signal
strength.
SQ is displayed as a bar on several screens, such as the Receiver Status
screen, and as a numeric value in Sat Status. When SQ is shown as a bar
the taller the bar is, the stronger the signal. When SQ is shown numeri-
cally, it ranges from 0 (lowest quality) to 9 (highest quality). An SQ of 4 or
higher indicates a strong signal that the unit will not lose its lock on.
SIGNAL QUALITY
7 - 9 Strong
4 - 6 Good
0 - 3 Weak: may lose lock
When SQ is weak,
Ñ
is shown on all displays.