CPC Subgroup
H04B 3/46 Monitoring; Testing
Full Title
Line transmission systems (combined with near-field transmission systems H04B5/00) > Details > Monitoring; Testing
4 direct subcodes
Child Classifications
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- H04B 3/462 Testing group delay or phase shift, e.g. timing jitter
- H04B 3/48 Testing attenuation (H04B3/466 takes precedence)
- H04B 3/487 Testing crosstalk effects
- H04B 3/493 Testing echo effects or singing