CP42/50/52 Position menus Chapter 4
46
Status – can either be:
LOCKED = locked on a beacon and receiving differential data
.
NOT LOCKED =
not locked on a beacon and receiving no differential
data.
NOT INSTALLED = there is no built-in DGPS module in unit.
NOT IN USE
= external DGPS receiver applied.
Beacon is monitored –
YES
or
NO
.
If
YES
it should be safe to rely on the received differential data,
because the beacon station’s performance is under observation.
If
NO
, then you have to use the received differential data with caution,
as there is no guarantee it is not faulty.
Frequency – the frequency of the beacon station can be set manually if
known. However, when left in
AUTO
the navigator will always search
for the nearest station with a good signal strength.
Bit rate – indicates bits per second, and can be set manually to 25, 50,
100 or 200 bps.
Signal strength – a good signal strength is 20 and up.
Signal to noise ratio (SNR) – should be 8dB and up.
Message – type 16 message will be displayed when received from the
DGPS system. The contents of this message could be something to do
with the performance of the system. Temporarily out of service, etc.
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