You are lucky that Owon are sending you new boards. In my case I am still waiting for the UK dealer to "authorise" my claim. I believe it is Chinese New Year however so maybe that's why I have not heard back from them.
After 72h per cover on acid:
As you can see, I have open a new thread Comparison of oscilloscopes ground noise, urging others members to upload their oscilloscope measurement.
There was no any great participation in that discussion and as you can see, a member reported that with this method we can not be exported reliable results btw different oscilloscopes, while another member suggested instead of using the probe to use a BNC shorting cap directly on the input connector.
The interesting was the uploaded captures from a Rigol - probably a DS1052 or something similar - with the cheap Chinese Probe (like ours) the Rigol was at 80mV about and with expensive Tektronics Probe it was 20mV about.
Mine after all modifications to this test with the BNC Shorting Cap has 12-16mV (10X) on CH1 and 14-18mV on CH2.
Hello everyone. I see my record of 12 ... 20mV still has not mastered Although I can `t do it myself yet s top ... Interference from the LCD screen is not getting smaller ...
Hello everyone. I see my record of 12 ... 20mV still has not mastered Although I can `t do it myself yet s top ... Interference from the LCD screen is not getting smaller ...
That is unpractical for most of us. Perhaps a more subtle approach would be to advocate using ferrites on the probe cables of our cheap Owon probes to make them function more like expensive Tek probes. This would minimize the antenna effect of the probe cable and is much less of a Draconian measure as opposed to using a Faraday cage.
That is unpractical for most of us. Perhaps a more subtle approach would be to advocate using ferrites on the probe cables of our cheap Owon probes to make them function more like expensive Tek probes. This would minimize the antenna effect of the probe cable and is much less of a Draconian measure as opposed to using a Faraday cage.
I have bought more expensive probes plus my Alanogue Bechman Industrial's probes and they all produce the same shitty results. The problems are not with the probes.
As many of you have seen when I started this thread a year ago ( I think I was the first to complain that the scope was defective ) , I am not trying to view minute signals, to the contrary the Owon hits trouble with signals as large as +/-100mV or much greater. As the scope has been sold with a 3 year warranty, I fail to see what kind of warranty this is that fails to recognise the severe fault but instead asks the users to either "grin and bear it" or replace some adapter cards that cost $50 (or was it more) and would surely invalidate the warranty once you open and hack inside the scope!
In this case I believe that since there is a demonstrable problem, Owon should be recalling the affected scopes and repairing them free of charge to the user. There must be laws in the US they are breaking by either not honouring the warranty or by asking users to do their own repairs and have to pay for it.
Hi everyone, i bought SDS7102V scope few days ago and i have question about it's FFT function.
I put DC signal from battery in one channel and measurement says voltage is 8.4V. When i turn FFT i can see big spike at 0Hz but it is not 8.4V, it is about 11.6V.
Does it need to be 8.4V??
Hi everyone, i bought SDS7102V scope few days ago and i have question about it's FFT function.
I put DC signal from battery in one channel and measurement says voltage is 8.4V. When i turn FFT i can see big spike at 0Hz but it is not 8.4V, it is about 11.6V.
Does it need to be 8.4V??As far as I know this initial spike is meaningless and always occurs regardless of where the probe is connected.
Hi everyone, i bought SDS7102V scope few days ago and i have question about it's FFT function.
I put DC signal from battery in one channel and measurement says voltage is 8.4V. When i turn FFT i can see big spike at 0Hz but it is not 8.4V, it is about 11.6V.
Does it need to be 8.4V??As far as I know this initial spike is meaningless and always occurs regardless of where the probe is connected.Are you sure??
What the others think?
@AndrejaKo
I just found it in manual. And the point is in AC coupling
Settings on the scope are:
Trigger: single, AC, rising edge, Auto
Time base: irrelevant
Memory: 10M
Voltage range: 5V or 2V
FFT window: irrelevant
Format: Vrms
X1
@TomC
When i connect CH1 (AC coupl.) to scope GND i get this:
Hi, all. Who knows, if I buy a chinese version, for example, http://item.taobao.com/item.htm?id=22075116206, is it possible to somehow set the English there?
Yes i see 0Hz spike, it is wierd..... i think red marker (1) on the left of the screen should be referent not center of the screen, but it is not big problem, before doing FFT i just need to put CH to the center. Am I right?