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Products => Test Equipment => Topic started by: I wanted a rude username on February 12, 2023, 06:07:48 pm

Title: Analogue-capable logic analysers? Looking for alternative to Saleae Logic Pro
Post by: I wanted a rude username on February 12, 2023, 06:07:48 pm
The Saleae Logic Pro's multi-channel analogue capture can be very useful for finding non-obvious electrical-level problems like bus fights. Problem is it's bloody expensive ... $1,000 US new, or maybe about $400 on the secondary market. Could just as well buy a four-channel scope at this price, except the tiny Saleae's portability is a feature in itself.

Alternatives:
Anything else out there?
Title: Re: Analogue-capable logic analysers? Looking for alternative to Saleae Logic Pro
Post by: cedric! on February 12, 2023, 07:01:09 pm
You can checkout the mixed signal devices here: https://sigrok.org/wiki/Supported_hardware
Title: Re: Analogue-capable logic analysers? Looking for alternative to Saleae Logic Pro
Post by: cedric! on February 12, 2023, 07:20:06 pm
maybe 3 channel ADC @ 500KHz + 21 digital channels is suitable?
https://hackaday.com/2022/03/02/need-a-logic-analyzer-use-your-pico/
Title: Re: Analogue-capable logic analysers? Looking for alternative to Saleae Logic Pro
Post by: Gyro on February 12, 2023, 07:25:21 pm
Quote from: I wanted a rude username on February 12, 2023, 06:07:48 pm
  • LHT00SU1 (http://sigrok.org/wiki/Noname_LHT00SU1): super cheap, fully open source, but only 1 analogue channel and only 24 MS/s

Ah, a clone of the old USBee AX pro. Just a standard unbuffered EzUSB chip $10 logic analyser with an ADC tacked on. There's no way that'll give you anything like 24Ms/s if you're monitoring digital signals too.


P.S. I'm not sure about the "fully open source". The reason why USBee dropped it and nearly went bust was because they got massively cloned.
Title: Re: Analogue-capable logic analysers? Looking for alternative to Saleae Logic Pro
Post by: I wanted a rude username on February 12, 2023, 07:51:51 pm
You're right, I should have clarified ... the software is fully open source, right down to the firmware that runs on the device (http://sigrok.org/wiki/Fx2lafw). It's 12 MS/s in mixed mode.

Quote from: cedric! on February 12, 2023, 07:20:06 pm
maybe 3 channel ADC @ 500KHz + 21 digital channels is suitable?

It's a bit slow aside from maybe capturing I2C or UART. The digital side could be useful for embedding in DUTs though. I'd already checked Sigrok's site unfortunately ... the devices classed as mixed signal there are mostly scopes, pricey and with limited analogue channels.