There are some nice mixed signal oscilloscopes made by Rigol (Chinese) at a very affordable price. They have a very deep capture buffer for both analog and digital signals. The build quality and capabilities of the MSO1104Z I have are outstanding. I got all the options included for free as a special offer (various decoding options, increased capture buffer depth, etc). IIRC none of the Rigol mixed signal scopes have more than 16 digital channels, but I never really needed more. There is an excellent review including teardown on David Jones' eevblog. All logic analysers I have used had a trigger output so that you can cascade multiple different ones to increase the number of channels captured. The only problem I can see with less than 32 channels would be if you have to trigger on a specific combination involving all 32 bits. Even that could be solved by a bit of external logic if you are desperate enough. Tom Hunter
On Tue, 14 Mar 2023, 9:12 am Paul Koning via cctalk, <cctalk@classiccmp.org> wrote: > Gents, > > I've been doing logic debugging (on a fairly primitive software defined > radio I designed back in 1999) with an old Philips logic analyzer. It's > not bad, certainly fast enough (I need 100 Msamples/s, it can do twice > that) and it's more than wide enough (I need 32 channels). But its capture > memory is microscopic so I struggle to see more than one or two > transactions, and I need to see more than that. > > Some poking around shows various USB-connected logic analyzers for quite > low prices, and a number of them seem to have suitable specs. I also ran > across sigrok.org which seems to be an open source logic analysis > framework that can drive a bunch of those devices. Nice given that too > many of them only come with Windows software. > > I suspect there are others that have not too expensive logic analyzers and > might be able to offer up suggestions or product reviews. > > paul > >
