Operation with Full Function Handset |
If a GPS device is not connected via NMEA, the radio emits a
Operation at Power Up
At power up, the radio monitors the NMEA line for 1 minute. If a signal is detected on NMEA, the radio determines whether the data is valid. If valid, the data is accepted and the NMEA indicator is displayed on the LCD.
If no GPS signal is detected on NMEA after the 1 minute monitoring period, a
If at a later time valid data is received on NMEA, the data is accepted and the NMEA indicator is displayed solid (no longer flashing).
Operation When the Signal is Lost or Becomes Invalid
If positional data that was previously detected becomes invalid or is no longer detected, the radio monitors the NMEA line for 1 minute for it to be restored.
If a signal is restored on the NMEA line and the radio determines the data is valid, the data is accepted and the NMEA indicator returns to a solid state (not flashing).
However, if no signal is detected, the NMEA indicator flashes and a 5-
Operation When No Signal Detected for 4 Hours
If no valid positional data is received or input manually within 4 hours of the previous alert, the NMEA indicator continues to flash and the staccato alert tone is again emitted. This pattern is repeated every 4 hours if no positional data has been detected. If no manual input was made during the previous 23.5 hours, all the position fields are set to 9’s and the time and date fields are set to 8’s.