Understanding Preselection

This video provides a basic technical introduction to preselection, with emphasis on the importance and use of preselection in EMI testing.
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Timeline:
00:00 Introduction
00:15 About mixers
01:11 Mixers in the signal chain
01:51 Compression
02:43 Compression and incorrect amplitude results
03:36 Compression and spurious products
04:00 Mixing products
04:45 Protecting the mixer: input attenuation
05:26 Protecting the mixer: filtering
06:06 What is a preselector?
07:02 Preselection
07:50 Without preselection
08:11 With preselection
08:35 Preselection: pros and cons
09:30 Where and why are preselectors used?
10:52 Preselection in an EMI receiver
11:48 About CISPR 16-1-1
12:49 CISPR and pulsed signals
13:39 Pulses in time and frequency domains
13:50 Effect of preselection on pulsed signals
14:27 Summary
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[@sudeepshetty4530]

Thanks for the detailed presentation.

[@wholeeo]

Excellent explanation. Thank you.

[@seshansesha7645]

Thank you

[@pauldenisowski]

Thanks for the support!