Overall, mechanical filters with lumped elements of all kinds can cover frequencies from about 5 to 700 kHz although mechanical filters down as low as a few kilohertz (kHz) are rare.
A rhombic requires a large area of land - especially if several antennas are installed to serve a variety of geographic regions at different distances or directions or to cover widely different frequencies.
Davis filtered Cage's line readings through three different kinds of animal growls that were played backwards and covered separate frequencies.
The dishes will be equipped with a number of high performance single pixel feeds to cover frequencies from 580 MHz up to 14 GHz.
The Allen Telescope Array uses innovative 6.1m offset Gregorian dishes equipped with wide band single feeds covering frequencies from 500 MHz to 11 GHz.
An all-electronic telescope covering low frequencies from 10 to 240 MHz which has been coming online through 2009 to 2011.
Wideband in this context is usually considered to cover frequencies in the range of 50-7000 Hz, therefore allowing audio with richer tones and better quality.
With the older system, the G band covers frequencies from 140 to 220 MHz (1.5 m-1.2 m) and is in the modern A band.
It was equipped with heterodyne receivers covering frequencies between 210 and 880 GHz, corresponding to wavelengths between 0.35 and 1.4mm, for observations of lines from the interstellar medium.
They include current and up-to-date information covering radio call signs and frequencies, a telephone directory, code-words (for rudimentary encryption), and visual and sound signals.
