On a boat I have the problem tha the Nasa Duet depth meter giving "OUT" on the display instead of the measured depth.
Normally this means that the reflected wave is not detected.
I have checked the cable signal (combined input/output coaxial cable to the tranducer) .
I can see a 150µS 91V pulse and afterward a series of oscillations. I do not know the shape of reflected pulses. Anyone can help me on that one. I include an image of the pulse. (You have to take into account that the probe was 10:1 and multiply amplitude by 10).
Whats the next step?
Normally this means that the reflected wave is not detected.
I have checked the cable signal (combined input/output coaxial cable to the tranducer) .
I can see a 150µS 91V pulse and afterward a series of oscillations. I do not know the shape of reflected pulses. Anyone can help me on that one. I include an image of the pulse. (You have to take into account that the probe was 10:1 and multiply amplitude by 10).
Whats the next step?
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