flatulent said:
Unless stated otherwise, zero means transmission zero. With other modifiers it can mean impedance zero (short circuit to ground at a particular frequency).
Sorry, I don´t think so.
1.) "Transmission zero" means that there is a
real zero with ideally zero volts at the output - for example like a notch or a low pass with Chebyshev/invers approximation.
2.) "Zero" means (in most cases, if not stated otherwise) that there is a
complex zero - like in allpass cicuits. As a consequence the output of the filter goes NOT down to zero volts.
Added after 47 minutes:
Supplement for clarification:
By using the phrase "zero" always a zero of the transfer function is ment.