Re: [PSES] Question re: Measuring a signal in a noisy environment

2019-04-20 Thread Edward Price
John: I don’t see how a test house can “impose” compliance. I thought all they could do was perform testing, and by looking at the results of the testing, declare compliance. You also ask “how can a company know that the result is reliable?” Isn’t that the entire justification for

Re: [PSES] Dated and undated references

2019-04-20 Thread John Woodgate
I think there is a fundamental trap that it is very easy to fall into, especially if the committee hasn't adopted (and enforced) a standardized format for filenames. *If you change a document, you must change the filename, not only in itself but also if it appears (as it should) at the top of

Re: [PSES] Dated and undated references

2019-04-20 Thread Ghery Pettit
Mick, I agree that a corrigendum would be the fastest way to fix this issue. It wouldn’t be the first time it was necessary. We had to issue one quickly after CISPR 32 Edition 1 was published as the IEC CO made some changes after the FDIS was voted that rendered the new standard useless.

Re: [PSES] Dated and undated references

2019-04-20 Thread Mick Maytum
John's comment "e.g. in the rare case where a dated reference standard is found to be seriously defective." reminded me of an IEC 62368-1:2018 problem caused by a dated reference. The current IEC 61643-331:2017 is wrong in that an earlier draft document, instead of the IEC Editors draft was

[PSES] Dated and undated references, was: Re: [PSES] Question re: Measuring a signal in a noisy environment

2019-04-20 Thread John Woodgate
I changed the Subject,  because my comments on the extract below are much more general. The heading of Clause 2 (usually the Normative references clause in the past and now always so) in IEC/EN standards has changed over the years. and since I see IEC standards being cited without the 60 000