What is "bandpasses"

Usage examples of "bandpasses".

The Argus bandpasses were narrower than a hertz, so to be detected the transmitters must be modulating very slowly, slower than one bit of information a second.

Fundamentally, the Message was continuing on the same frequencies, bandpasses, time constants, and polarization and phase modulation.

But it seems to me that we can do something to enhance the likelihood of success in such a search, and that the ordinary pursuit of radio astronomy is not quite the same as an explicit search of certain stars, frequencies, bandpasses, and time constants for extraterrestrial intelligence.