test equipment / Re: Z80 / Z84C Swap (Doh!)
drlegendre at gmail.com
Mon Aug 17 22:06:33 CDT 2015
Ha, yeah.. I've seen a number of his vids.. Don't mean to offend, but he
comes off a bit squirrely (hyper) for me.
Yet another freaking Aussie nutcase, lol - but he does seem to get some
good info across, in between the audible glamour.
On Mon, Aug 17, 2015 at 9:54 PM, Jay Jaeger <cube1 at charter.net> wrote:
> You might check EEVBLOG on Youtube. The guy's a blast and covers what
> you are asking about. He indicates 8 bits is really not to his liking
> at all, to go for more. He also goes over the sampling rate of some of
> the USB DSO's out there.
> EEVBlog #13:
> On 8/17/2015 6:15 PM, drlegendre . wrote:
> > Hey Dave & All,
> > Could you give a little quick kick-start guide to bit depth & sampling
> > on DSOs? It's always kind of stumped me, not that I've ever read deeply
> > into it.. but how is it that you can get any kind of (vertical, right?)
> > resolution out of 8 or even 12-bit samples?
> > Example line of thought - 8 bit sample = 256 possible vertical positions.
> > Even if the screen is low-end (640 x 480) that's almost 2X more height in
> > pixels than samples in an 8-bit sample. So each increment is like 2
> > tall and seems like it would be awfully blocky and imprecise. Things
> > seem to get even worse if you try to do maths functions..
> > I must be viewing this quite wrong?
> > On Mon, Aug 17, 2015 at 3:55 PM, Dave G4UGM <dave.g4ugm at gmail.com>
> >>> -----Original Message-----
> >>> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Noel
> >>> Chiappa
> >>> Sent: 17 August 2015 21:12
> >>> To: cctalk at classiccmp.org
> >>> Cc: jnc at mercury.lcs.mit.edu
> >>> Subject: Re: test equipment / Re: Z80 / Z84C Swap (Doh!)
> >>> > From: Eric Smith
> >>> > If a person has any reasonable business justification
> >>> But a lot of the people here don't; they're purely hobbyists. So
> >> $1K
> >>> on a piece of test equipment just isn't realistic for them.
> >>> Having said that, I do see some DSO's on eBay for not much money (e.g.
> >> the
> >>> little hand-held ones), and those might be a good alternative to a
> >>> analyzer - I never used one, so I tend not to think of them.
> >>> Noel
> >> I haven't tried the dedicated DSO's but I have a couple of USB connected
> >> ones and a laptop. For value for money I don't think the Hantek 6022
> >> be
> >> beaten. It really only goes to 8Mhz but I see they can be had for $60 -
> >> and some sellers have US stock. I also have a 200Mhz one but to be
> >> for 99% of vintage stuff the Hantek is fine. It is only 8-bit, it is a
> >> noisy, but its small enough to slip in the laptop bag, it doesn't need a
> >> separate PSU...
> >> Dave Wade
> >> G4UGM
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