Electronics > Repair
Repair : HP 3245A precision DC/AC source
TiN:
I added that :D
alanambrose:
Any stats guys here who understand accuracy of noise calculation i.e. how many samples you need to get a given confidence level on the noise figure?
I see e.g. this:
http://web.eecs.umich.edu/~fessler/papers/files/tr/stderr.pdf
...and it looks like it converges fairly quickly.
Alan
TiN:
50 samples would be enough, based on results I saw so far.
Likely will be best to take 60 samples, and disregard first 10 (as some instruments may have some initial offset from range switch operation).
3roomlab:
--- Quote from: TiN on December 08, 2015, 02:10:12 pm ---50 samples would be enough, based on results I saw so far.
Likely will be best to take 60 samples, and disregard first 10 (as some instruments may have some initial offset from range switch operation).
--- End quote ---
ah ok, i get what the sterr.pdf meaning now you said 50. that plot on page 2 fig.1
dom0:
--- Quote from: deadlylover on December 02, 2015, 06:38:18 pm ---those Schaffner made in Switzerland ones are cursed.
--- End quote ---
To be fair it only affects the older ones with the RIFA MP2? caps. New Schaffner filters are as good quality as it gets.
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