No specific needs, mostly generic, measuring I/O between multiple items simultaneously to verify they 'agree'. I'd need to measure 230400bps serial lines (about 2.3MHz sample rate needed), but probably nothing faster than that.
A 3MHz sample rate won't catch short glitches and such. In my opinion, you can never get one that is too fast.
With Logic State Analyzers (LSA's) the most important specs are speed, number of channels and the controlling software.
I've seen good reviews for the Salae, but there are a bunch out there . . . anyone with opinions?
I recently spend numerous hours (if not days totally) to find the right LSA for me and I ended up with the Intronix' Logicport
but it's a bit more than you want to pay. During the research, I compared numerous LSA's both their specs and their software.
We may have different needs in LSA's, but to me number of channels that can sample at max. speed should be high (some can only run at max. speed on a few channels).
I consider the Salea nothing more than a toy and it's far too expensive considering its specs.
24MHz sampling rate is laughable and don't get taken in by the large amounts of samples it can hold in one go - nobody is going to scrutinize several kilobytes so megabytes of storage is not really a competitive parameter IMO - max. sampling speed is important however and that it can work in both clocked mode and state mode (which most can these days).
The trigger voltage should be adjustable and it should be able to stand over-voltages on the inputs.
I considered the Open Workbench Logic Sniffer
, as it's open source (and cheap, $45 assembled), but I found it too slow.
The design specs:
* 70MHz+ sample speeds
* 32 channels
* 16 buffered, 5volt tolerant channelsMore specs here
Apart from the speed, it sounds good and it's cheap and open source (and works with a free open source (IIRC) software).
You also need to consider what you may need somewhere down the road and not get something that just barely get you through your immediate needs. After all, it's not something you buy regularly.