User's Manual Part 1

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GPS Receiver Enable
This section enables or disables the external GPS receiver input (example
“disabled”):-
Use the Scroll keys to select the setting required (example
shown –“Enabled”):-
press the key
Note:- An external GPS receiver is required for GPS functions. If this option is
enabled and a GPS is not connected to the PRC-2090 a warning message will
appear on the display “GPS Unavailable”