On Tue, Feb 23, 2016 at 8:52 PM, jwsmobile <j...@jwsss.com> wrote: > For serial I use a Saleae 8 bit analyzer. [...] > You do have to use a level shifter with the thing because it is designed for > 3.3v logic and needs to be adjusted accordingly.
The Saleae Logic Pro 16 (and probably the Logic Pro 8, but I haven't checked) are designed for an operating input voltage range of +/-10V, with an abs max rating of +/-25V. Saleae specifically states that it can be directly connected to RS-232. The Logic Pro models are more expensive than the other (amateur?) models, but support analog input on all channels. I now use a Logic Pro 16 for most of my simple logic analyzer requirements, but still use an Agilent 16700 logic analyzer mainframe when I need more than 16 channels.