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Chapter 14 - Service and Maintenance Functions
Page 14-8
Generally, you'll use automatic mode for everything except
specialized applications.
To choose automatic mode:
1. At the RECEIVER INFORMATION screen, press the CUR-
SOR PAD to highlight the BEACON FREQ field, then
press the EDIT key.
2. Press the CURSOR pad left to highlight the AUTO field,
then press the ACCEPT key (or CANCEL to leave the
option unchanged).
Manual tuning
You can override the receiver's selection of automatic differen-
tial stations at any time. Under manual control, you manually
set the differential frequency and baud rate to tune in a partic-
ular differential transmitter. In manual mode, the differential
receiver outputs DGPS corrections only from the selected sta-
tion. Although the need for manual operation is rare, it is eas-
ily accessed at the RECEIVER INFORMATION screen. Here,
you can set the differential frequency to any value between
283.5kHz and 325kHz. You can set the baud rate to any of the
four standard rates: 25 bps, 50 bps, 100 bps or 200 bps.
To choose manual mode:
1. At the RECEIVER INFORMATION screen, press the CUR-
SOR PAD to highlight the BEACON FREQ field, then
press the EDIT DATA key.
The cursor defaults to the MAN field.
2. Use the KEYPAD to enter the desired frequency.
3. When done, press the ACCEPT key (or CANCEL to leave
the option unchanged).
Manually setting baud rate
It is strongly recommended that you leave the beacon baud
rate setting at AUTO. To manually set the baud rate for the
selected differential frequency:
1. At the RECEIVER INFORMATION screen, press the CUR-
SOR PAD to highlight the BEACON BAUD field, then
press the EDIT key.
961 Operations and Reference Manual Rev. D
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