Hi David,,  If your interested in converting your files to PSN format, you might
try John Lahr's WDQ2PSN converter program,,,  I use it with my Dataq DI-150RS
and it works great!!   You might ask John if it will work on your files??? 
Hopefully, they are the same format????
You can find it at:

http://jjlahr.com/science/psn/gldn_psn.html

Scroll down to the middle of the page to find his info and the link to the
program!
If yours are the same format and you decide to try it and have problems or
questions, I'll be glad to try and help,,,,   or if you would like to send a few
minute of a recording, I'll try to convert it and let you know how or if it
works!!!   If your interested in seeing one of my traces converted to PSN format
and then converted to a gif using the WINQUAKE program, you can see it on Bob
Shannon's web site,, (it is the recording of the 4.0 Mammoth Lakes quake a few
days back),  when you get there click on TRACES,,  at:

http://www.televar.com/~earth/alert.html

  Stephen
  PSN Station #55
  near Pilot Hill Ca
  38.828N  120.979W

"David H. Youden" wrote:
> 
> Jim,
> 
> I use Dataq"s Windaq software for a variety of reasons, so my recordings
> are not compatible with the more common formats. I do have a few, which I
> would be happy to share with anyone who can handle the file format, or I
> can make picture files of them in some common format e. g. GIF or JPG.
> 
> Dave...
> 
> At 09:59 AM 3/16/03 -0800, you wrote:
> >Hi Dave-  You got my attention- Nice work!- Do you have any records
> >(seismograms) posted that we can look at?
> >Jim O'Donnell - UNLV
> >On Sun, 16 Mar 2003 11:57:47 -0500 "David H. Youden" 
> >writes:
> > > All,
> > >
> > > I got a chance yesterday to run some tests on my instrument.
> > >
> > > Here's what I did:
> > >
> > > I opened the loop and drove the force balance coil directly with a
> > > HP
> > > function generator ( Model 3310B). I placed a 1000 ohm resistor in
> > > series
> > > with the coil. I took my input signal from across the coil so I had
> > > a
> > > sensitivity of 1000 volts/amp. The output was taken at the output of
> > > the
> > > cap gauge circuit, after a 2 pole 35 Hz filter that would have been
> > >
> > > inconvenient to remove. The output device was a HP 54603B memory
> > > scope. The
> > > driven mass is pretty close to 500 grams.
> > >
> > > I attempted to take phase and P-P position data at constant
> > > acceleration
> > > from 0.1 Hz to 10 Hz while holding the current through the coil at
> > > 94
> > > microamps, i. e. 94 millivolts across 1000 ohms. Why that value?
> > > Because it
> > > was the maximum that I could use at 0.1 Hz and still maintain
> > > linearity of
> > > the cap gauge signal.
> > >
> > > Results:
> > >
> > > The force balance coil/magnet combination have a transfer function
> > > of 0.26
> > > Newtons/Amp.
> > >
> > > I lost the signal in the noise at about 6 Hz. Obviously, I could go
> > > higher
> > > with a larger input signal.
> > >
> > > The phase between acceleration and displacement was less than 20
> > > degrees
> > > throughout the range.
> > >
> > > The P-P displacement was about 60 nanometers at 6 Hz.
> > >
> > > The laws of physics still apply, as the P-P position signal was
> > > inversely
> > > proportional to the square of the frequency.
> > >
> > > There was no sign of roll-off due to damping from the cap gauge, but
> > > then
> > > the amplitudes were pretty low at the higher frequencies.
> > >
> > > Comment: My low pass filters are set to roll off at 5 Hz so data
> > > beyond
> > > that point is academic.
> > >
> > > Dave ...
> > >
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