Products > Test Equipment
USB logic analyzer - what's the current "favorite" for ~150$? Hantek 4032L?
Andy99:
I will add my 2cents about current status 4032l+sigrok+PV.
- External clock feature is already in mainline. It's available only for newer version of FPGA (>0). (FPGA could be updated without any problems.) One of the problem of external clock is, that upper layer doesn't know, which time based was captured. You can select only nearest frequency from drop-down menu. I have reported this problem in PV, and hope so, that will be fixed.
- 4032l has HW support from different trigger eg. BUS value, time... . These options are not available in PV now. After that, I could take a look on sigrok with implementation.
- USBXI could be implemented on sigrok, but I didn't find someone, who is requesting this feature.
Regarding to DSlogic, they have separated stream from mainline PV, which have better support. https://github.com/DreamSourceLab/DSView
SMB784:
--- Quote from: toli on July 06, 2018, 03:32:23 pm ---Question is if this 0-5V range also holds for the CLK input vs just the 16 data channels. I think I've seen somewhere a mention that the CLK input is at 3.3V constant, but I can't seem to recall where it was.
BTW, you don't actually need >100MHz square wave to test these parameters. The threshold can be checked at low speed quite easily (and if I'm honest that's the more interesting parameter for me at the moment). For the maximum frequency test a sin wave will suffice. At these frequencies the rise time will limit square waves and they will look more like a sine anyway unless you take extra good care of the test setup. I've actually used sin wave input at 100MHz to the Cypress FX3 IC as a sampling clock because of a similar limitation, and its works like a charm with no issues at all (just add VDD/2 DC offset obviously :)).
--- End quote ---
I would be very surprised if the clock input is limited at 3.3V. I will see if I can find out whether or not this is true.
I'll try the sine wave option, the offset will be the hard part though. I have a 1GHz signal generator, so I'll play around and see what I can come up with.
Rolo:
It will not fit the $150 budget for 16 channels but as a tip to all, Saleae does offer significant discounts on their products. I recently bought a Logic8, got the Enthusiast discount after one request trough their "contact us" form.
https://blog.saleae.com/saleae-discounts/
toli:
Rolo, I have experience with their tools, they are very nice indeed. However, the price for something that will fit my needs is way out of the budget, so I'm not even considering them.
Regarding DSlogic - I have heard back from DSlab support, and they have confirmed the external clock is fixed at 3.3V level unfortunately.
I will say that the fact they have replied within a few hours is definitely a point in their favor. I haven't heard back from Hantek yet, and I've emailed them over 3 days ago.
maginnovision:
--- Quote from: toli on July 07, 2018, 05:55:08 am ---Rolo, I have experience with their tools, they are very nice indeed. However, the price for something that will fit my needs is way out of the budget, so I'm not even considering them.
Regarding DSlogic - I have heard back from DSlab support, and they have confirmed the external clock is fixed at 3.3V level unfortunately.
I will say that the fact they have replied within a few hours is definitely a point in their favor. I haven't heard back from Hantek yet, and I've emailed them over 3 days ago.
--- End quote ---
I had emailed hantek some time ago and I think it took a week or two. The biggest difference is they seem to shift most of that sort of responsibility to dealers since they don't, as far as I know, sell directly. If you have issues after you buy one, or even now, maybe contact them. Even if they aren't responsive it'll probably be quicker turn around.
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