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Hantek 6022BE 20MHz USB DSO

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x_name41:
hello i use Windows 7 OS and there is a problem. When I use the original software (Hantek6022BE) for my PC oscilloscope Hantek 6022BE, RMS is shown correctly but when I use one of the beta versions (Open6022BE v1.0 BetaPR19 ,Open6022BE v1.0 BetaPR18, Open6022BE v1.0 BetaPR17) RMS shows incorrectly. For example if in the original software RMS shows 53mV at amplitude= 163mV, 12.5% Duty cycle, it at use beta version RMS show  1.00674V at amplitude= 163mV, 12.5% Duty cycle, furthermore in the beta version when the input of the oscilloscope is toward ground RMS shows 999mV and this not change even when calibrating

p.s. I would like to point out that this applies only to RMS value only in the beta versions, everything else is correct

cstratton:

--- Quote from: waste on January 01, 2019, 10:59:19 pm ---my current limitation is the 5V limit which translates to 50V with a 1:10 probe. Anything above that is reported as 5V/50V . The way I got it, is that's a firmware/software limit not a hardware one.
--- End quote ---

No, that (or at least something) would be a hardware limit.

This box is not really a traditional scope - it's a data streaming device with a very limited front end and no real hardware trigger.

waste:

--- Quote from: cstratton on January 02, 2019, 06:16:31 am ---
--- Quote from: waste on January 01, 2019, 10:59:19 pm ---my current limitation is the 5V limit which translates to 50V with a 1:10 probe. Anything above that is reported as 5V/50V . The way I got it, is that's a firmware/software limit not a hardware one.
--- End quote ---

No, that (or at least something) would be a hardware limit.

This box is not really a traditional scope - it's a data streaming device with a very limited front end and no real hardware trigger.

--- End quote ---

Ok so I got something wrong after all these pages I read. Anyhow the limit is still there   :horse: :horse:
So the only solution would be a 20:1 attenuator they sell for 5 euros . This way you could theoretically measure upto 100volts, which isn't so bad after all.

Microcheap:

--- Quote from: waste on January 06, 2019, 10:46:45 pm ---Ok so I got something wrong after all these pages I read. Anyhow the limit is still there   :horse: :horse:
So the only solution would be a 20:1 attenuator they sell for 5 euros . This way you could theoretically measure upto 100volts, which isn't so bad after all.

--- End quote ---

The maximum voltage input of this scope is 5V, it is a hardware limit, not software so it can't be changed. It has input protection (diodes) that will clamp any signal greater than 35Vpk.
So yes, if you need to probe signals with bigger amplitudes you can either use an attenuator or a probe like the P4100 with x100 attenuation https://www.aliexpress.com/item/INSTRUSTAR-20MHz-ISDS205B-PC-Based-USB-Digital-Oscilloscope-match-p4100-Oscilloscope-Probe-100-1-Withstand-2KV/32704502182.html

waste:

--- Quote from: Microcheap on January 07, 2019, 03:53:57 am ---
--- Quote from: waste on January 06, 2019, 10:46:45 pm ---Ok so I got something wrong after all these pages I read. Anyhow the limit is still there   :horse: :horse:
So the only solution would be a 20:1 attenuator they sell for 5 euros . This way you could theoretically measure upto 100volts, which isn't so bad after all.

--- End quote ---

The maximum voltage input of this scope is 5V, it is a hardware limit, not software so it can't be changed. It has input protection (diodes) that will clamp any signal greater than 35Vpk.
So yes, if you need to probe signals with bigger amplitudes you can either use an attenuator or a probe like the P4100 with x100 attenuation https://www.aliexpress.com/item/INSTRUSTAR-20MHz-ISDS205B-PC-Based-USB-Digital-Oscilloscope-match-p4100-Oscilloscope-Probe-100-1-Withstand-2KV/32704502182.html

--- End quote ---

Ok just for me to understand better. You write that the protection diodes will clamp any signal greater than 35Vpk. Which is bigger than 5Volts. So with a 1:10 attenuation you get 350Vpk. I understand that Im somewhere wrong in my logic but can you please guide me through it ? :)

thanks

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