recoomend me an oscope - Page 1
Forum section: electronics / testgear

author: snarkysparky
author_rank: Frequent Contributor
timestamp: June 26, 2025, 04:23:20 pm
content: I have two systems of different design to ponder.One performs better then the other. I need to know why.To accomplish this i will need to capture 11 digital channels at 1 Mhz sampling rate for about 3 seconds.Really nice would be post processing analysis software that would let me easily study the signals and maybe even point me to where something is different. I know it would take some setup to get the question right.Looking at siglent sds2104x along with logic probe.For my purpose it could be a PC based oscope also.budget is less than $2k us dollars. Closer to $1k would make my pitch a lot easier.Thanks

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 26, 2025, 04:42:02 pm
content: Why do you want a scope for that job/budget? Wouldn't a dedicated logic analyzer be more fitting? Like this guy:https://www.saleae.com/products/saleae-logic-pro-16Comes in black or red too.

author: tggzzz
author_rank: Super Contributor
timestamp: June 26, 2025, 04:51:53 pm
content: Scopes are analogue domain tools.Your problem is a digital domain problem, so you should use digital domain tools such as logic analysers and protocol analysers. Those tools aremuchcheaper, and the post-capture analysis can be done on a PC with any of the standard available programs.Look for an LA or PA that allows you to ignore irrelevant details, e.g. it should only capture an input when a clock changes and should ignore the inputs at all other times. That will greatly simplify your post-capture analysis.

author: Fungus
author_rank: Super Contributor
timestamp: June 26, 2025, 09:46:17 pm
content: 3 seconds at 1MHz is a very low requirement, you absolutely don't need a $2k oscilloscope for that.There's probably something on Aliexpress for under $100 that's compatible with the Saleae software,eg.https://www.aliexpress.us/item/3256808489266972.html(randomly chosen item)

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 26, 2025, 10:18:04 pm
content: Quote from: Fungus on June 26, 2025, 09:46:17 pmBut do they come in black or red??

author: Fungus
author_rank: Super Contributor
timestamp: June 26, 2025, 10:29:45 pm
content: Quote from: KungFuJosh on June 26, 2025, 10:18:04 pmWith purple USB cable!

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 26, 2025, 11:45:31 pm
content: I don't know whether he's pitching to a spouse or a business, but if it's a business, I'd steer away from Ali.

author: snarkysparky
author_rank: Frequent Contributor
timestamp: June 27, 2025, 03:03:13 am
content: i like the saelig. But $1400 is a little high just for a logic analyzer.The equipment needs to be useful beyond the current project.I think the boss went for the Siglent with logic probe.Will probably have to save the captured record and write Octave scripts to find what i need.thanks all

author: snarkysparky
author_rank: Frequent Contributor
timestamp: June 27, 2025, 03:08:08 am
content: Also im an old and grumpy guy. I don't want to mess with amazon equipment for days , weeks to get it working.I tend to rip the wires away and stomp into the floor crappy stuff.Thanks again

author: tautech
author_rank: Super Contributor
timestamp: June 27, 2025, 04:01:21 am
content: Quote from: snarkysparky on June 27, 2025, 03:03:13 amWise.In scope mode you have a powerful trigger suite and a search function you can use to find abnormalities.With the 200 Mpts in 2kX Plus you can capture long records and do this on the scope.Here's some clues on how to put this capability into effect with the SDS1104X-E:https://www.eevblog.com/forum/testgear/siglent-sds1204x-e-released-for-domestic-markets-in-china/msg1370717/#msg1370717