Ron K. Jeffries wrote:
A friend uses this USD $389 logic analyizer from Intronix in his lab. How do the specs look? https://www.pctestinstruments.com/logicport/specifications.htm
When I needed a logic analyser I ended up buying a Rigol DS1102CD. It has 2 100 Mhz scope channels and 16 logic channels. Having both analogue and digital channels has definitely been useful. On the other hand, it lacks an external clock mode.
I considered various PC-connected devices. The main disadvantage was that I would need to also buy a Windows computer to operate them, and that would push the cost above the Rigol. (And I'd need a bigger desk.) At that time, the specs weren't as good as the Intronix device that you've linked to.
One feature of the expensive Tektronix analysers is that the signal wires are actually coaxial, and you can have a pair of clips for each signal if you want. You need to think about how you would connect the Intronix box to your device under test, and how long the signal/ground loops would be. Unlike a scope with X10 or X100 probes, the noise you pick up is injected into the circuit as well as into the analyser. Whether this matters depends on the speed of the signals you're looking at. I found the Rigol was just about OK for a 120 MHz bus. For things like I2C at normal speeds there shouldn't be any problems.
If you really only want to do I2C, I'm sure that there must be much simpler and cheaper devices that would work just as well. I would probably try to make my own...
Regards, Phil. _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
