Hantek 1008B Oscilloscope
So far, we have seen that a 50kHz square wave is at the edge of the Hantek 1008B’s realistic capabilities at eight channels, but looks fantastic in single channel mode.
Would it not be great to directly compare how good a 50kHz square wave looks in one / two / four / eight channel modes, from screen captures?
Let’s set the time/div to 2us, and take a closer look at the 50kHz signal – this should show us the interval between samples nicely…
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Well, that sure looks like they configure the ADC in the scope to sample every four microseconds when eight channels are active at 2us/division… or do some fairly serious re-sampling on the captured data.
On the previous page, we saw the 50kHz signal with a 10us/div setting with eight channels. Let’s look at four channels, 10us/div:
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That looks much better than with eight channels!
I am guessing that sampling will occur every 2us. Let’s set the scope to 1us/div and see if I am right:
(click on the image for a larger view)
Looks like a sample every 2us to me!
Time to take a look at the two channel results, at 10us/div:
(click on the image for a larger view)
Looks really good. Let’s try 1us/div:
(click on the image for a larger view)
Looks like just under 1us between samples, which makes sense given the 2.4Msps maximum capture rate. With two channels, that would max out at 1.2Msps, or a little under 1us between samples.
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