14 Mar
2023
14 Mar
'23
1:53 a.m.
I completely agree about the Saleae devices. Very good software, nicely
made hardware. They're not cheap though, and only go up to 16 channels.
You can capture 16 channels with the very cheap Cypress FX2 dev boards (the
older Saleae devices were pretty much that).
I'd like to find a convenient solution for more width though - I have an
HP16500B but it's huge and noisy. There are one or two possibilities in the
sigrok hardware list but nothing I've tried yet.
On Tue, Mar 14, 2023 at 1:28 AM Jim Brain via cctalk <cctalk(a)classiccmp.org>
wrote:
On 3/13/2023 8:12 PM, Paul Koning via cctalk 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
If you have 8 or 16 channels to watch, the Saleae units are absolutely
incredible: https://www.saleae.com/
For more channels, I will admit I'm partial to old HP units, especially
the frames. I have a 16702A here, which I love. I have 3 333MHz LA
boards in it 68 channels per board, 204 channels overall. It's not
quite as trivial to use as the Saleae units, but it does offer remote
access via X or VNC.
Jim
--
Jim Brain
brain(a)jbrain.com
www.jbrain.com