NorthStar 958 Operator's Manual page 72

Chapter 5 - Determining Your Position
Displaying DGPS
status
Page 64
When the DGPS indicator is displayed, it means the 958 is
using this higher level of accuracy. When you require this
additional accuracy, be sure to check often to see that either
the DGPS or WAAS indicators are present.
To display more information about received DGPS corrections,
press the DGPS INFO menu key on the GPS POSITION screen.
The DGPS STATUS screen is displayed, showing the DGPS
transmitter currently used.
The upper part of the screen shows the beacon's name,
frequency, baud rate, and the beacon's distance and bearing
from your vessel. The lower part of the DGPS STATUS screen
shows three bar graphs:
•
SNR: The Signal-to-Noise Ratio is a good measure of over-
all signal quality, and should be as high as possible. Val-
ues of 15 and higher are best; anything below 10 could
indicate poor reception.
•
SIGNAL: This represents the actual strength of the
received signal. This value should be as high as possible,
and it varies with distance from the differential transmit-
ter.
NOISE: The NOISE level measures the static caused by
•
lightning and other atmospheric effects, and should be
958 Operator's Manual, Rev. A