Send one up here to Ky. I found a preowned one for $39,000 but would
rather keep the house. Can a sound card keep up with this? Could one of
the audio analyzer programs display the frequency change on the
horizontal axis if it could only sample one dit? I would think the
microchirp would only amount to one cycle or so.
-----Original Message-----
From: "LORONA,AL (A-USA,ex3)" <al_lorona@agilent.com>
To: "'Paul Christensen'" <paulc@mediaone.net>, Ten Tec
<tentec@contesting.com>
To: <tentec@contesting.com>
Date: Fri, 1 Feb 2002 12:02:52 -0700
Subject: RE: [TenTec] RE: More About Clix
>
> Paul--
>
> Man, you are absolutely right. I really just wanted people to know that
> you
> can measure just about anything given the right test equipment. I don't
> really appreciate it enough, but one of the great advantages of my job
> is
> that I do have the unbelieveable luxury of getting my hands on this
> stuff
> whenever I need it. My problem is I don't have the time to play around
> with
> it.
>
> R,
>
> Al
>
>
> > -----Original Message-----
> > From: Paul Christensen [mailto:paulc@mediaone.net]
> > Sent: Friday, 01 February 2002 5:10 AM
> > To: Ten Tec
> > Subject: Re: [TenTec] RE: More About Clix
> >
> >
> > The operative word here is "reasonable." Al, I don't
> > disagree with your
> > statement in the least, but for most of us, securing a vector signal
> > analyzer simply isn't an option for our measurements.
> >
> > -Paul, W9AC
> >
> > ----- Original Message -----
> > From: "LORONA,AL (A-USA,ex3)" <al_lorona@agilent.com>
> > To: "Ten Tec" <tentec@contesting.com>
> > Sent: Friday, February 01, 2002 0:59 AM
> > Subject: [TenTec] RE: More About Clix
> >
> >
> > >
> > > I posted a reply about measuring "microchirp" yesterday but
> > it never made
> > it
> > > to the list. Here's my second try:
> > >
> > --------------------------------------------------------------
> > ------------
> > -
> > >
> > > >>You can't. In fact, I know of no electronic instrument capable
> of
> > > >>reasonably detecting it. Sometimes the ear is the best
> > judge. The
> > keyed
> > > >>waveform oscilloscope display has no association with
> > frequency shift.
> > >
> > > >>-Paul, W9AC
> > >
> > >
> > > In fact, you can. You need an instrument that can capture a
> > signal without
> > > missing any data and then play it back while displaying
> > frequency vs.
> > time.
> > > Such an instrument is called a vector signal analyzer.
> > >
> > > The VSA scrolls through a display of the spectrum of the
> > signal. In this
> > > way, the horizontal axis is frequency and the vertical
> > axis is time. If
> > the
> > > plot is in color, the color can represent amplitude. This
> > type of display
> > > format is called a "spectrogram". I think some PSK-31
> > programs (like
> > > Digipan?) show the spectrum; just imagine successive
> > spectra scrolled in
> > the
> > > display. It's hard to describe.
> > >
> > > Markers can be used to measure delta freq and delta time.
> > This is how
> > folks
> > > measure the start-up transient behavior of PLLs and other
> > oscillators,
> > and
> > > how law enforcement agencies positively identify a
> > specific transmitter
> > by
> > > it's start-up "fingerprint".
> > >
> > > Al W6LX
> > >
> > > _______________________________________________
> > > TenTec mailing list
> > > TenTec@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/tentec
> >
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
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