Chartplotter v Radar interference

david_steward

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16 May 2001
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I have posted this on PBO but I thought I would try here too.

I have a new Navman 5600 colour chartplotter. It works very well, except for when my 8 year old Raytheon R20X radar is transmitting.

After a variable amount of time, sometimes a few minutes, other times half an hour, the chartplotter crashes. The screen freezes and the unit has to be turned off at it's circuit breaker. More recently, the unit has crashed then performed a factory reset. There are no problems when the radar is in standby mode.

I have tried a multitude of possible fixes.

I have re-routed the gps antenna and the plotter power leads. I have connected the power leads to a different circuit breaker to the radar. There is no nmea connection between the radar and the plotter. I moved the gps antenna. I temporarily moved the chartplotter away from the radar display. No luck

After all this, I discovered that the plotter still crashes when it is not even connected to it's gps antenna.

The plotter is wired correctly, with the screen wire earthed to ground.

The two displays are about 12" apart. There is no scope for seperating them further. I have another gps, a Garmin 128 which is unaffected by the radar.

Is the interference likely to be in the DC power supply system?

Or direct RF interference from the radar scanner to the plotter display? They are at least 12 feet apart and not in line horizontally.

This is driving me nuts, coz as you would expect, both manufacturers feel the other's kit is the problem!

Any ideas?





<hr width=100% size=1>We don't want a sports cruiser, totally impractical. Err ok then.

Dave S
 
D

Deleted User YDKXO

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I'm no electronics expert but is the battery voltage dropping when the radar is switched on and could this cause the plotter to crash?

<hr width=100% size=1>
 

david_steward

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Joined
16 May 2001
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Location
Chatham, Kent
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Sadly not the answer as I have tried a seperate battery to supply the chartplotter and it has not helped.




<hr width=100% size=1>We don't want a sports cruiser, totally impractical. Err ok then.

Dave S
 
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