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Hantek 6074BC: Surprising results
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BillyO:
Hantek should just stick to making cheap USB scopes. They seem do a decent enough job at that.
Here is a screen shot from a ~$200 6074BC, supposedly 70Mhz 4ch. USB scope, with a sweep time of 5ns/div.
It shows a 10% to 90% rise time of 2.3ns!
According to this page at Tektronix: https://www.tek.com/en/support/faqs/how-bandwidth-related-rise-time-oscilloscopes#:~:text=Historically%2C%20oscilloscope%20frequency%20response%20tended,Bandwidth%20x%20rise%20time%20%3D%200.45.
That equates to a bandwidth of .45/2.3 GHz or ~ 190MHz!
Did I get something wrong or are these cheap scopes highly underrated?
thm_w:
As you noticed here: https://www.eevblog.com/forum/testgear/hantek6074bc-hack-to-250mhz/
Its the same hardware as in the 250MHz model, and sample rate is 1GS/s, so its not too surprising.
BillyO:
I guess with Hantek's apparent quality control it's not such a stretch to have a few that are software configured for 200MHz to 'leak' out as a 70MHz units.
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