I need help locating signals in sonar SPU

[Glennk]

I need some help :eek:

I have been looking at our SPU to locate the 5v return signal needed to hook up the sonar to a A/D interface and run a sonar aquisition software on a computer.

I found a signal that I asume is the right one, as this was the most complex signal i could locate at the boards in the SPU.
Can any one verify or weaken this?

The signal was found at Test Pin 2 :

http://i2.photobucket.com/albums/y2/Glnorw/Weaverley/Sonaramplifier.jpg

And this is the signal that I found. It is very complex, and I can not see what other signal that could be this complex in this SPU. Sadly I have no schematics for these PCB's, so the only way is to trace the signals and look for something that I really have no idea of what it would look like on the scope.

http://i2.photobucket.com/albums/y2/Glnorw/Weaverley/scope_signal.jpg

Are there any one that have any clue if I have found the right signals?
Or know of where I can get any more info or even a schematic for the Sonar amplifier W308 PCB from Waverley Electronics. # 5845-99-533-0744

I'll be happy for any feedback!

Thanks!

Glenn

[Glennk]

I have been looking a bit more at this, and I can not see other than this must be the right signal.
It responds to the gain settings, and what other signal at the sonar amplifier could that be?

Min gain setting:

http://i2.photobucket.com/albums/y2/Glnorw/Weaverley/min_gain.jpg

50% gain :

http://i2.photobucket.com/albums/y2/Glnorw/Weaverley/50pts_gain.jpg

And max gain:

http://i2.photobucket.com/albums/y2/Glnorw/Weaverley/max_gain.jpg

So now I only need a National Instruments 6063E daq card to test the sonar on the bench before I put it together in a box and tow it out in the sea to do some real testing with the sonar aq. software.
Does any one have a card for lease or sale?

Glenn

[Ingemar Lundgren]

How much does a card like that cost?

[Glennk]

The National Instruments cost about US$ 1000.- if you order it new from the dirstributor of NI. But I think the card could be found at a price like 750-800.- if you look around.

I was hoping to find a secondhand card, as it is fairly common used in various applications. It might even be that it exsists compatible cards from other manufacturers. I havent checked this out yet.

Glenn

[Sture]

Hello
Is this a 100KHz Waverly / Dowty / Ultra electronics ?
It have same schematics as older 5-wire Klein towfishes.

Do you trig the transmitter when you measure the signal?
It doesn't look like so...
Set the trigger signal to the Oscilloscope external trig input, and
then search for the analog signal.

Sture

[Sture]

Hello

I have purchased my boards from Ebay. There is now and then 6036E
and 6024E.

Sture