CISPR standard?

[generic_username]

Hi, I have a somewhat odd question, maybe someone can help me out.

I have a measurement result from an EMC Lab, I wasn't present when the test was made and I wanted to know what kind of Step Size they used for their Measurement, my colleague asked the test engineer the same question and got "according to standard" as a answer (Note that my colleague and I are new to that kind of testing, so naturally I have a lot of questions, as some things confuse me)

From what I could find on the net he probably meant the CISPR standard (could't find any free versions of that standard so probably have to buy them to get that information)

All I could find on the net that there's a rule of thumb that says bandwidth / 2.
Actually looking at the data it seems they used that bandwidth.
Also that step size is to low for us to see all harmonics of our signal so is it valid to test with a better step size
(I know that sounds like a stupid question, but it seriously confuses me)

Hope someone can bring light to my question.

cheers.

[T3sl4co1l]

Around 1%, for the last susceptibility test I sat in on.
CISPR 24 is probably the most likely, http://www.yme.gr/getfile.php?id=3028 (wonder how long that link will last) but it merely refers to IEC 61000-4 series tests.

Tim

[generic_username]

Thank you for your answer,
As we were doing radio interference measurement I think he was referring to the CISPR 16???
(my bad didn't think before posting)

 

Around 1%, for the last susceptibility test I sat in on.

So to get you correctly: if the Bandwidth is 1MHz then the best I could do is 10kHz?
cheers.

[ion54]

What type of test are you doing? Emissions or Immunity?
What type of product are you testing? What is the application? Is it automotive, consumer electronics, communications, medical?
Step depends on the frequency range you are investigating.