seperating sensor from circuitry

[GoKid]

Hi folks,

I want to drive ultrasonic transducers at 40KHz 3-4 feet away from the transducer drive circuitry itself- is this possible with twisted pair wires? Like-wise I would like to seperate the transducer receivers from their reciver circuitry by about 3 feet and keep the several receiver channels on one board instead of putting them with each transdsucer receiver. Has anyone had experience with seperating the sensor from the drive and reciever circuitry in this way before?

 

[Warpspeed]

Twisted pair should work o/k for the transmit transducer, but shielded twin microphone cable would be much better.

The receive transducer must be treated like a low level microphone (which it is), so screened twin microphone cable is an absolute necessity.

 

[GoKid]

Ok, thats a start, thanks. Do I also need any line drivers/amps to reduce signal attentuation to the receiver circuitry from the receiver transducer? Even without a line in between the signal is in the millivolt to microvolt region.

GoKid!

 

[nbucska]

the problem is noise
I would use narrow band amplifier.

Plesae read FAQ240-1032
My WEB: <

http://geocities.com/nbucska/>

 

[GoKid]

Thanks to all -