The input capacitance of the oscilloscope is probably changing as it warms up which is a bad sign. Is the compensation consistent as the high impedance input attenuators are switched in and out?
Prices should have gone down over the past 20 years. Salaries are irrelevant in this discussion.
If the Chinese manufacturers can do it, why not the American manufacturers? Everything is produced in China anyhow.
In fact Chinese scopes are not subject to the basic flaws that were discovered recently on this American scope. And no, this is not a software problem. This is a plain hardware problem. Way to go Keysight!
If the Chinese manufacturers can do it, why not the American manufacturers? Everything is produced in China anyhow.
Chinese scopes do have some software issues, but at least these can all be fixed in software.
I am not saying that the MSOX3012 should be 20 times cheaper than the HP54645D,
but it should not have exactly the same price tag either.
If the Chinese manufacturers can do it, why not the American manufacturers? Everything is produced in China anyhow.
In fact Chinese scopes are not subject to the basic flaws that were discovered recently on this American scope. And no, this is not a software problem. This is a plain hardware problem. Way to go Keysight!
Chinese scopes do have some software issues, but at least these can all be fixed in software.
And although the probes can be a bit flimsy, at least they don't scratch over time. Way to go Keysight!
Other people choice companies with good support, well done documentation, key studies, application notes, trainings materials and videos available from this companies. At least Keysight pay salary to Daniel, who haunt here and give us response for our questions. Where somebody from Rigol, Hantek and etc..
Where I need to go with Rigol for performing calibration for my device? I know where I can do it for Fluke, Keysight, Tek...
That all cost money, that is because not able to do price comparison for Chinese brands and Americans brands.
I would take scracthy probes all day long when compared to the DP832A overheat, Project Yaigol or the other user that had the ADC issues on his DS4000 due to the absence of a heatsink. My DS4000 came with NO heatsinks, and was purchased straight from them!
- Even been perfectly compensated, after some time probes not give me same fine picture after some time of using scope (probably 1-2 hour) and after checking probe compensation again it seems just slightly under compensated. I tried to do fine compensation for both probes after 20 min warm up my scope and repeat check it again after one hour of using scope, I seen just slight under compensation for my probes. Probably input chain is slightly unstable, I don't know exactly
You deliberately take out the probe compensation issue? Or is that issue just a minor glitch in your opinion? Really?
The input capacitance of the oscilloscope is probably changing as it warms up which is a bad sign. Is the compensation consistent as the high impedance input attenuators are switched in and out?
Do you mean, is some changing in the signal for 10x after switching from 10x to 1x and back 10x? No, signal remains same. Both probes have same behaviour on both channels.
I assume that LF compensation is nothing more than matching output probe capacitance to the oscilloscope input probe capacitance. It should be equal and adjusting only by variable capacitor placed near BNC connector at the probe. Only passive components involved in this chain.
I give my scope warm up 20 min and more and after that checking compensation matching. I use also use hi-res and averaging acquisition modes for make fine adjustment.
If I switch off scope, in give him rest and start using again, probably next day, after checking compensation signal form not seems so fine adjusted. It always seems just slightly undercompensated.
May be I want fine precision, may be I just cavilling at the scope, probably it's ok for scope, I do not know.
Would bee good to check it with external signal generator, but I currently do not have it.
I would take scracthy probes all day long when compared to the DP832A overheat, Project Yaigol or the other user that had the ADC issues on his DS4000 due to the absence of a heatsink. My DS4000 came with NO heatsinks, and was purchased straight from them!
You deliberately take out the probe compensation issue? Or is that issue just a minor glitch in your opinion? Really?
(...)
In fact Chinese scopes are not subject to the basic flaws that were discovered recently on this American scope. And no, this is not a software problem. This is a plain hardware problem. Way to go Keysight!
(...)
Chinese scopes do have some software issues, but at least these can all be fixed in software.
QuoteWould bee good to check it with external signal generator, but I currently do not have it.
This is probably not a bad idea; maybe the probe compensation signal is drifting as it warms up.
Prices should have gone down over the past 20 years. Salaries are irrelevant in this discussion.
If the Chinese manufacturers can do it, why not the American manufacturers? Everything is produced in China anyhow.
QuoteWould bee good to check it with external signal generator, but I currently do not have it.
This is probably not a bad idea; maybe the probe compensation signal is drifting as it warms up.
But would a drift of the compensation signal really be critical, and be able to make previously adjusted probes appear uncompensated? I have always been working under the assumption that the details of the compensation reference signal don't matter much. In fact, my (low-end) scopes have compensation signals with pretty lame slopes...
I have always been working under the assumption that the details of the compensation reference signal don't matter much. In fact, my (low-end) scopes have compensation signals with pretty lame slopes...
The probes team is still looking into it, and getting some fresh probes from manufacturing to check in on things. It'll be at least a few days before we get our hands on a fresh set of probes.
Thank TK,
Because seems, only one who watching how I suffer from chicken-feed with this probes right here. Unfortunately, she telling nothing
I discovered this issue when I tried to setup my scope right from the box after arriving. I did initial probe compensation but after some time I found signal changing and repeat this procedure twice or more