Zen Zero
New member
Does anyone know in what form a doppler log probe presents its output?
Doppler Probe Characteristics
- Thread starter Zen Zero
- Start date
earlybird
Well-known member
You don't identify the transducer, but the current Airmar ultrasonic log outputs NMEA 2000 if that's any help.
wot
Member
From the probe itself, it may be a reference voltage that corresponds to a negative or positive doppler shift from the transmitted frequency. It may be the actual frequency differential between the Reference Freq and the returned signal.
There's more than one way to skin a cat and without knowing the specific piece of equipment and it's specs its pure speculation.
No cats were harmed in the creation of this post.
There's more than one way to skin a cat and without knowing the specific piece of equipment and it's specs its pure speculation.
No cats were harmed in the creation of this post.
Zen Zero
New member
Thanks guys, this is useful. It's for a friend of mine who is dreaming about making his own head system out of a £200 netbook.
I'm guessing that what comes from the probe is pure analog signal, as from a microphone, and that the head system performs whatever signal analysis is needed to convert it into speed.
I'm guessing that what comes from the probe is pure analog signal, as from a microphone, and that the head system performs whatever signal analysis is needed to convert it into speed.