NorthStar 941X Reference Manual page 84

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DGPS data
timeout
Page 76
ual mode, the beacon receiver will output DGPS corrections only from
the selected station. Though the need for manual operation is rare, it is
easily accessed from your 941X keypad.
To manually choose a beacon, you must select the frequency and baud
rate (the beacon's data transmission speed) of the desired beacon.
1. To first change the frequency, press the STAR key until you display
the USER CUSTOMIZATION screen.
2. Press the RECEIVER OPTIONS menu key. Move the cursor to
BEACON FREQUENCY and press the EDIT menu key.
3. Press the down cursor key once, to change from "AUTO" to
"MANUAL." A beacon transmitter frequency will appear to the
right of the word "MANUAL."
4. Use the right cursor key to highlight the digits you wish to change.
Enter the appropriate frequency and press ENTER when you are
done.
You may also manually set the baud rate for the selected beacon fre-
quency. However, it is strongly recommended to leave the BEACON
BAUD RATE setting at AUTO.
A non-Northstar external beacon receiver cannot be manually
controlled by the 941X, unless it supports the MX50R control
protocol. Refer to the beacon receiver manufacturer's instruc-
tions to determine if this control protocol is supported.
If the beacon receiver stops receiving differential data, the 941X will
continue navigating for a short time using the old DGPS corrections. Re-
ception of the DGPS data can be interrupted by bad weather, severe
thunderstorms, extreme distance from the beacon, etc.
You may allow the 941X to navigate for a set period of time using this old
data with no DGPS interruptions. To change the data "timeout" period,
refer to page 89.
7 — Other Special Functions 7 — Other Special Functions
7 — Other Special Functions 7 — Other Special Functions
NOTE
Rev. D