Hello,
Does the problem of compensation have a real impact on measurement accuracy? I did not check, alas.
No.
It only effects 10x probe compensation when 1.2V/div is stepped to 1.22V+/div and the the probe needs be re-compensated.
Er, sorry Rob but the answer should be YES....
Try this usage scenario....
1. The user has their probe set to x10 and vertical gain set to 1.2V/div or under, and then performs probe compensation on the built in square wave.
2. User then samples a waveform that goes off scale so they change to 1.22V/div or higher - there will be no warnings but the probe compensation will be wrong and
the displayed waveform will be inaccurate.
Despite the fact that this is the only scope I'm aware of that does not maintain probe compensation when changing vertical gain, Siglent America claims that it is in specification; specifically they said in an email to me...
We are familiar with the probe compensation issue. All of the SDS1000X-E products are in specification. There is no specification for “probe compensation flatness” between ranges.
Siglent sent me capacitors but warned that I may invalidate my warranty by fitting them - I asked them to change the caps for me - they refused but eventually took my scope back and gave me a refund.