NorthStar 6000i, Быстрый старт и справочное руководство

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Reference section 10 — Setup
Changing your receiver settings
Northstar 6000i
the appropriate frequency—any value
between 283.5kHz and 325kHz—and
press
ENTER .
NOTE:
You can also manually set the baud rate
(the transmitter’s data transmission
speed) for the selected differential fre-
quency. However, Northstar strongly rec-
ommends leaving the
beacon baud rate
setting at Auto.
NOTE:
The 6000i can manually control a
non-Northstar external differential
receiver as long as the receiver supports
the MX50R control protocol. Check the
manufacturer’s instructions to see if they
support this control protocol before con-
necting to a 6000i.
Setting differential operation
The 6000i’s differential operation setting
has four options for differential
information:
•
auto — the 6000i evaluates available
WAAS and radiobeacon corrections and
uses whichever provides the higher
accuracy
•
WAAS — the 6000i uses only WAAS
differential corrections
•
disabled — the 6000i doesn’t use any
differential corrections
•
radiobeacon — the 6000i uses
radiobeacon corrections only
Choosing a DGPS corrections time-out
The DGPS data time-out setting deter-
mines how long the
6000i will continue to
use old DGPS corrections if no new correc-
tions are received due to bad weather,
extreme distance from beacon, etc.
If the time-out period ends without any
new corrections, the
6000i reverts to
standard GPS navigation, displays the
old
corrections
status message on the DGPS
STATUS screen, and displays the
DGPS lost
alarm. DGPS will automatically resume
when the
6000i receives valid corrections.
Under normal operating conditions, you
should set the time-out to one minute (the
factory default) to guarantee the best accu-
racy. A time-out of 30 seconds or less is
often too short and can cause false alarms.
Generally, one minute provides good navi-
gation accuracy, and is best left
unchanged.
In bad weather — where you may need to
tolerate a minor loss of accuracy — you can
increase the value up to a maximum of
four minutes, which lets the
6000i ignore
occasional brief outages of differential
reception.