[sdiy] WTB: Paia EKx40

[Magnus Danielson]

From: Gene Stopp <gene at ixiacom.com>
Subject: RE: [sdiy] WTB: Paia EKx40
Date: Wed, 10 Mar 2004 13:56:06 -0800
Message-ID: <15FDCE057B48784C80836803AE3598D503A555F8 at mail.ixiacom.com>

Hi Gene,

> It was a 3325A. I do watch them on eBay from time to time, futzing around in
> my mind if I should give up the bench real estate and get one.

You should. I've found that they are a really good tools.

I've got mine sitting just under the Tek 11402 scope on the left side of my
new lab-bench. The right side is a HP 4195A network/spectrum analyser.

> >Do you have a copy of that to share? I'd love to see it. You've mentioned
> it before.
> 
> I might have it but it would be deep, in with the Curtis newletters
> (SytheSource?) and issues of Synapse and brochures for other obscurities...

If you could find the time, you know it would be apprechiated.

Cheers,
Magnus - currently digging deeper into jitter and wander than ever

> Best Regards,
> 
> - Gene
> 
> 
> -----Original Message-----
> From: Magnus Danielson [mailto:cfmd at bredband.net]
> Sent: Wednesday, March 10, 2004 1:37 PM
> To: gene at ixiacom.com
> Cc: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] WTB: Paia EKx40
> 
> 
> From: Gene Stopp <gene at ixiacom.com>
> Subject: RE: [sdiy] WTB: Paia EKx40
> Date: Tue, 9 Mar 2004 15:39:07 -0800 
> Message-ID: <15FDCE057B48784C80836803AE3598D503A555E3 at mail.ixiacom.com>
> 
> > One would think....
> > 
> > ...but back in the ASM-1 development days I was messing with an HP3325
> > big-ass function generator,
> 
> HP3325A or HP3325B? ;O)
> 
> I just *happends* to have a HP3325B as my main function generator. The -B
> adds
> a modulation generator which is actually quite excessive if you dare to look
> more closely at it. A 8192 sample programmable MODULATION WAVEFORM, now how
> is
> that for an odd feature? Without GPIB control it is just to forget to use it
> fully.
> 
> > and I noticed that the sound was particularly crisp and clear, especially
> > when doing a cutoff sweep through a VCF. The harmonics jumped out one by
> one
> > as if controlled by faders. The waveforms on a fast scope were
> mathematically
> > perfect, with invisible (i.e. instantaneous) vertical slopes, even at high
> > frequencies. It also could have had something to do with extremely low
> > jitter. This is a rather expensive lab box, even these days on ebay.
> 
> Yeap, but well worth it. I even find myself beging for one at work at times.
> It's excessive frequency control is really the margin I want. 1 uHz steps of
> frequency is really lovely! I run my HP3325B from my a Rubidium clock, so
> both
> jitter and wander is quite low.
> 
> > I remeber the CFR Tau VCO docs specifically stating that jitter was a good
> > thing, being more "natural" sounding, and showing a diagram of their
> > intentionally added jitter (maybe they just couldn't get the noise out of
> > their sawtooth discharge threshold, and made it a selling point?). I do
> not
> > remember anything special about the sound... just another VCO...
> 
> Do you have a copy of that to share? I'd love to see it. You've mentioned it
> before.
> 
> Hmm... ;O)
> 
> Cheers,
> Magnus