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post #9 of Old 12-01-2011
Join Date: Feb 2010
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The readings from the masthead transducer are all analogue signals, so a flaky connection may very well cause problems. First check all connections, especially between the masthead unit and its base (unplug and plug in few times). There is a simple test to check the operation of the masthead unit, you only need a voltmeter for that. It is described on Raymarine's site:

(You might not get the described results with the speed signal, az it is infact a square wave signal, the faster the wind blows, that higher its frequency. Depending on the meter you use, you might get alternating values or the described voltages.)

If you do not get these values, suspect the transducer or the cabling.
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