From: "Norm Waterston"
Subject: Re: need help using spectrum analyzer
Date: Fri, 1 Nov 2002 04:17:28 -0500
Organization: MindSpring Enterprises
X-Server-Date: 1 Nov 2002 09:17:03 GMT
X-Newsreader: Microsoft Outlook Express 6.00.2720.3000
Please see my reply below:
> So...a good place to start is to simply connect the input to a source
> of some interesting spectrum within its range, and have a look at it.
> Signals with modulation are generally interesting, whether it's AM or
> FM modulation. I would think most of the knobs would be fairly
> self-explanatory, if you have the general concept of spectrum analysis
> down. Most of the knobs are used to set things like frequency span
> and center frequency on the horizontal, and the scaling and gain on
> the vertical. I work on much newer analyzers than that, so I'm not
> sure what all it has in the way of display options...modern ones
> generally can display the spectrum in various units like linear or log
> (dB), and spectrum or power spectral density (power per unit
> bandwidth), but I doubt the 141 series can do very much along those
Yes, that's exactly what I did... hooked it up and experimented. It will
detect from 100 Khz- 1250 Mhz, so I could see plenty of broadcast signals
when connected to the outside antenna. And, yes, it does have linear/ log
> We have a few applications notes but they tend to emphasize the
> advantages of digital spectrum analysis. I'm not sure they'd do you
> much good. But you might try poking around the Agilent web site to
> see if you can find anything of a general spectral analysis nature.
I visited Agilent tonight and downloaded some files, based on your advice
and other responses.
> Can you be a bit more specific just what you're looking for? Have you
> been able to see anything on it yet? If you have a plugin that covers
> any broadcast signals (AM, FM, TV) or communications signals, try just
> hooking an antenna to the input, and adjusting the sensitivity till
> you can see signals, and then "zoom in" on some fairly strong signal.
> You'll likely learn a lot just by playing. I think it's safe to say
> that so long as you don't put too much signal power into the input,
> you won't hurt it by turning knobs.
Yes, I've learned a lot this evening. Maybe now I can pull out the manuals
and read through them again. They should make more sense now.