Assertion: mpx filter | /r/CapableOf | block the 19 khz pilot tone
Facets:
Source sentences:
text: An MPX filter is, at least, a notch filter blocking the 19 kHz pilot tone, and possibly higher frequencies in the 23-53kHz and 63-75kHz bands.
text: A proper MPX filter for quality recording is, at least, a notch filter that will block the 19 kHz pilot tone, and possibly higher frequencies in the 23-53kHz and 63-75kHz bands.