Furuno FCR-2807 Manual De Usuario

15. Navigation Sensors 

Tx: Normal
Rx: Normal

Tx, Rx:
No arc appears when 
attenuation is 10dB. 
Replace magnetron.

13.5 to
18.5 nm

13.5 to
18.5 nm

  Display                        State

A performance monitor, incorporated in the antenna unit, is required for a radar installed on vessels of 300 GT and 
upward engaged in international voyages. Two units are available: 
•  X-band radar PM-31 (9410 ± 45 MHz) 
•  S-band radar PM-51 (3050 ± 30 MHz) 

1.  Use the trackball to select the MENU box then push the left button. 

2.  Spin the scrollwheel to select Echo then push the scrollwheel. 

[Echo]

2nd Echo Rej

PM

SART

Tune Initialize

 

3.  Spin the scrollwheel to select PM then push the scrollwheel. Check to activate, uncheck to deactivate. 

"PM" appears on the display when the performance monitor is active.  

1.  The radar is automatically set up as follows: 

Range: 24 nm 
Pulse Length: Long 
Blind Sector: Off 
A/C Sea: Off 
A/C Rain: Off 
Echo Stretch: Off 
Echo Average: Off 
Video Contrast: B1 
Tune: Auto 
Gain: Initial setting (as set with PM GAIN ADJ at installation) 

2.  Turn on the performance monitor referring to procedure shown above. 

3.  After observing the results turn off the performance monitor.

The range scale is automatically set to 24 nm. The radar 
screen will show one or two arcs. If the radar transmitter and 
receiver are in good working order in as much as the original 
state when the monitor was turned on, the innermost arc 
should appear between 13.5 and 18.5 nm. The performance 
monitor can observe a total of 10 dB loss in transmitter and 
receiver. 

 

Note: The lengths and location of the arcs may vary 
according to the direction in which the antenna unit is 
installed. Judge the strength of the echo that appears within 
60° from arc location to confirm if the radar is working 
properly or not.