Version 2.0
107
Configuration
Operator’s Manual
Use this mode when maximum navigation coverage is more
important than accuracy. Reverting to GPS mode will degrade
the overall navigation results, but it is better than no naviga-
tion results at all in most circumstances.
DGPS Only - sets the receiver to only provide DGPS position
fixes
. If corrections are being received and their age is less
than the
Max Age
limit, the receiver will operate in DGPS mode
(assuming there are enough corrections to operate in DGPS
mode). Otherwise, the receiver will not provide any position fix
at all.
Use this mode when accuracy is more important than maximum
navigation coverage. When operating in this mode, you should
also set the
Max Age
to
30
seconds.
Off -
sets the receiver to operate in
GPS
mode only.
Max Age -sets the maximum time limit that the last received DGPS
correction will be applied to the satellite range measure-
ment in the receiver.
The default setting is
60 seconds
. The
receiver will accept values from 10 to 999 seconds. Due to the
removal of the S/A dithering from the satellite signal, you may
now use values of 300 seconds in the maximum age and still be
very accurate.
Message 16 Alarm - sets the alarm to On or Off if a reference station
text message is received.
The default setting is
Yes
. Received
Type 16 messages can be displayed on the
GPS7
screen, re-
gardless of the alarm setting.
Alarm For No Corrections - sets the alarm to on or off if DGPS correc-
tions are not received within the Max Age
. The default setting
is
Yes
. If the alarm is set to
Yes
, you should notice that the
receiver drops out of DGPS mode and into the mode selected in
DGPS Mode
described earlier in this section at the same time
the alarm sounds.
Alarm on health change -
Sets the alarm to On or Off if the satellite
becomes unhealthy or unusable.
WAAS/EGNOS enabled -
sets the source of differential correction to
come from satellite based augmentation system such as US-WAAS
or European-EGNOS system. Although this systems are available,
they are still not considered as IMO compliant systems. Use of
these differential correction sources should be done with great cau-
tion.
Summary of Contents for MX420
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