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If the ‘Garmin DGPS’ format is selected, additional fi elds are provided to control a GARMIN
differential beacon receiver directly from your GPS 152. You may have the unit automatically scan
for the DGPS beacon signal or you can enter the beacon frequency and bit rate on the unit and the
information will be used to tune the beacon receiver.
To have the unit automatically scan for a frequency:
1. With the unit set to ‘Garmin DGPS’, use the ARROW KEYPAD to highlight the “Beacon” fi eld
and press ENTER/MARK.
2. Highlight ‘Scan’ and press ENTER/MARK. The numbers in the “Frequency” fi eld will change as the
unit scans from 284 kHz to 325 kHz, 200 bit rate, then 100, at 6-second intervals.
To restart the scan:
1. Press MENU, highlight ‘Restart Scan’ and press ENTER/MARK.
To manually enter a frequency and bit rate:
1. With the unit set to ‘Garmin DGPS’, use the ARROW KEYPAD to highlight the “Beacon” fi eld
and press ENTER/MARK.
2. Highlight ‘User’ and press ENTER/MARK.
3. Highlight the “Frequency” or “Bit Rate” fi eld, press ENTER/MARK, then enter a frequency or bit
rate and press ENTER/MARK when done.
The “Status” fi eld will show one of the following:
• Tuning — Unit is attempting to tune to the specifi ed frequency and bit rate.
• Scanning — Unit is automatically scanning through the frequencies and bit rates.
• Receiving — Unit is receiving DGPS signal and ready for operation.
• Check Wiring — Unit is not making connection with DGPS receiver.
When the unit is receiving a DGPS signal, the “SNR” (Signal to Noise Ratio) and “Distance” fi elds
will show data. The SNR range is 0dB to 30dB, with 30 being the best. The “Distance” fi eld may or
may not show data, depending upon the signal being broadcast from the DGPS site.
You may also manually enter a frequency and bit rate.
Status
Field
SNR and Distance will show data when signal is received.
152 Manual Part 2.indd 61 11/27/2002, 2:56:35 PM