Out of 2 Ratings

Owner's of the Furuno Radar Detector 1623 gave it a score of 3.9 out of 5. Here's how the scores stacked up:
  • Reliability

    4.5 out of 5
  • Durability

    4.0 out of 5
  • Maintenance

    3.5 out of 5
  • Performance

    4.0 out of 5
  • Ease of Use

    3.5 out of 5
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NMEA port setup, GPS WAAS setup
The NMEA port can function as an input port
or input/output port.
If you are using the GP-320B, turn on the
GPS WAAS feature.
1. Show the Installation menu and then
press to choose NMEA PORT.
2. Press to display the NMEA port options
3. Press or to choose IN/OUT or IN/IN
as appropriate.
IN/OUT: Input and Output (default setting).
For GP-320B choose this setting.
IN/IN: Input only (Available with
connection of multiple navigators.)
4. If you selected IN/OUT at step 3, press ,
to choose NMEA OUTPUT, and then
press to display the NMEA OUTPUT
options window.
5. Press or to choose OFF or ON.
Choose ON to output input data. Choose
OFF to not output data or if the GP-310B
or GP-320B is connected.
6. Press to close the window.
7. If the GP-320B is connected, press to
choose GPS WAAS. Otherwise, go to
step 10.
8. Press to open the window.
9. Press to choose message type.
Note: WAAS is currently in the
developmental stage. While in the
developmental stage choose message
type 02. Change to message type 00
when WAAS becomes fully operational.
10. Turn off the power.
3.5 Magnetron Heater Voltage
Magnetron heater voltage is formed at the
MD Board of the antenna unit and
preadjusted at the factory. Therefore, no
adjustment is required. However, verify
heater voltage as below.
Do not open the equipment.
DO NOT attempt the
procedure below unless
totally familiar with electrical
1. Open the antenna cover and remove the
shield plate.
MD board
shield plate)
Antenna unit, inside view
2. Turn on the power. DO NOT transmit.
3. Connect a multimeter, set to 10 VDC
range, between #6 (+) and #4 (-) of test
point TP804.
MD board
4. Confirm that the multimeter shows 8.0 V
±0.1 V. If it does not, adjust potentiometer
VR801 on the MD Board.
5. Turn off the power.
6. Refasten the shield plate.
7. Close the antenna cover.