Hantek DSO5202BM: artificial deterioration of oscilloscope features.

Oleg10011001

The problem applies only to the mode with two windows. The problem is that the used sampling frequency oscilloscope associated with scan time, which is installed in the upper window, and this despite the fact that the range of adjustment of the scanning much smaller than in single-window mode. In the end, it turns out that the maximum available sampling frequency signal only 800Ms/sec (must be 1Gs/sec) ... This problem is easily solved, if in operation, with two windows to link switching signal with the sampling frequency at the time fixed in the lower scan window. I hope that the manufacturer of the oscilloscope will fix it in the new firmware version.

P.S: Sorry my bad english.

amy

Dir sir,
Please sende me a mailbox.
I want to send you the firmware.

Oleg10011001

Oleg10011001@mail.ru

Oleg10011001

After the firmware update, this problem no longer occurs. Thank you!

Oleg10011001

It has been found yet another artificial restriction of the oscilloscope capabilities, which concerns monitoring the slow current processes. For some reason, my oscilloscope can store in memory information about the process not longer than 26.6 minutes. I needed to follow the process lasts about 24 - 25 hours, but the oscilloscope for an unknown reason did not give me this opportunity. Why not allow the user, using the depth memory 2M increase scan time is the sampling frequency is reduced At least 10 samples per second (more preferably 1-2 samples per second) for monitoring of slow and lengthy process?

amy

The recorder has a limit. It can record the data less than 16M. The time is about more than two hours.
When the scope enters into recording mode, the basetime is fixed to 400ms.

Oleg10011001

Unfortunately, I did not understand your response, and I suspect that you do not understand my question. I'm not talking about the recording mode. I'm talking about an ordinary oscilloscope mode. I became necessary to observe the slow but lengthy process. I want to on the screen very slowly draws the curve of the waveform, so that I could observe the waveform on the screen to draw 24 hours (setting a scan time 1-2 hour per grid). For example I want to see the curve of voltage drop on the battery discharge when it is slow. Theoretically my oscilloscope is quite capable; if you use a lot of memory (2M) lower sampling rate (10S / s or less), you can get the waveform of a long process, but in practice some reason I can not do that - the minimum sample rate is 1250Ks / s and below does not fall (when using 2M memory).

amy

The maximum time base is 80s, is constant.
So no matter how much the memory depth is, the time to acquire all the points is the same.

Oleg10011001

I understand it. I do not understand why as the maximum time base value is taken 80 seconds? I do not see the physical limit to this value would for example 24 hours (when using Memory depth 2M), which would monitor the schedule of slow and long process... In my opinion, the maximum value of the time base must have a minimum 24 hours using 1S/sec sampling rate. Even in this case it is not used all available memory using memory depth 2M. On this, I believe that the oscilloscope capabilities have been artificially lowered. It would be nice if the maximum value of the time base was changed depending on the depth of the memory so that the memory used in any depth the minimum sampling rate would 1S/sec.

amy

Dir sir, this was already decided.
You can learn about our USB Oscilloscope: http://hantek.com/en/ProductList_1_2.html