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Hantek 6074BC: Surprising results
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Topic: Hantek 6074BC: Surprising results (Read 1239 times)
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BillyO
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Hantek 6074BC: Surprising results
«
on:
November 22, 2022, 04:42:25 pm »
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?
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Bill (Currently a Siglent fanboy)
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thm_w
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Re: Hantek 6074BC: Surprising results
«
Reply #1 on:
November 23, 2022, 12:58:00 am »
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.
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BillyO
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Re: Hantek 6074BC: Surprising results
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Reply #2 on:
November 23, 2022, 01:10:54 am »
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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Bill (Currently a Siglent fanboy)
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