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: https://www.youtube.com/watch?v=JTG6jWL0ZqA https://www.youtube.com/watch?v=Ev121xAt_k4 JRJ 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 rate > 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 pixels > tall and seems like it would be awfully blocky and imprecise. Things would > 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.g4...@gmail.com> wrote: > >> >> >>> -----Original Message----- >>> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Noel >>> Chiappa >>> Sent: 17 August 2015 21:12 >>> To: cctalk@classiccmp.org >>> Cc: j...@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 spending >> $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 logic >>> 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 can >> be >> beaten. It really only goes to 8Mhz but I see they can be had for $60 - $70 >> and some sellers have US stock. I also have a 200Mhz one but to be honest >> for 99% of vintage stuff the Hantek is fine. It is only 8-bit, it is a bit >> noisy, but its small enough to slip in the laptop bag, it doesn't need a >> separate PSU... >> >> Dave Wade >> G4UGM >> >> >
