Re: Simple spectrum analyzer for pre-compliance

Jeff Liebermann wrote:

Joerg <notthisjoergsch@xxxxxxxxxxxxxxxxxxxxx> hath wroth:


The pen lift thing would present a wee problem with the DSO. Other than that it could do it since mine and probably most others are capable of X-Y plots.


Connect it to the Z axis input (trace inhibit) of your DSO.


I am afraid it doesn't have that function. Unless it's thoroughly hidden somewhere.


That's how I do it now. Would be nice if I didn't have to ;-)


You don't have to. You can hire someone to do it for you.

Perhaps hire an artist have have them sketch the display?


Hmm, I might not even have to, my wife is pretty good at pencil drawings. Now I'd just have to cajole that pulse noise into sitting still for 10 minutes or so.


But it's not so much me, it's for clients. Most young engineers are not very familiar with spectrum analysis, much less with vintage equipment.


You'll be amazed at how quickly they learn after you explain that
their job, life, future, and salary depend on their ability to operate
the device. No rush, take all night if you need to.


:-)


It would be great if I could tell them "Press this, then that and later the other button and shoot it over via email attachment".


I have a camcorder for such exercises. I've video taped how I setup a
rather messy rack full of acronyms before it was shipped. On arrival,
the techs followed the video religiously, including purchasing a trash
can to match the one I accidentally left in the video. Immitation
works amazingly well, even with little thinking involved.

Incidentally, I intentionally delayed the shipment of the manuals so
that they had to follow the video and could not get creative. The
problems started immediately after the manuals arrived, when the
tweaks, adjustments, and "calibration" began.


Then I could look at the plot and tell them "Place 220uH between D17 and C45, then do the spectrum again."


You really are lazy. Pry yourself out of your overstuffed easy chair,
get up, and go look at the spectrum analzyer display. Then tell the
tech to make the changes. Think paperless office or save a tree. When
you're happy, say "print it" and do the photographic ordeal process.


There remains a wee problem though: I am a consultant and the engineers I am talking to are anywhere from 25 miles to 6000 miles from here. We do have a runway right in town and my office is next to it but I haven't found the matching LearJet on EBay yet.

--
Regards, Joerg

http://www.analogconsultants.com
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