Total posts : 45366
“The 222 was originally developed as a ‘post-processor’ to ensure US broadcasters’ compliance with FCC-mandated occupied-bandwidth regulations. It incorporates a fast, asymmetrical peak limiter, independent pre-emphasis-protection limiting, and a very sharp-cutoff low-pass filter with proprietary overshoot control.
The 222 finds ready application in a wide variety of AM broadcast situations. In addition to the NRSC 10kHz cutoff for medium-wave AM broadcasting in the US, any high-frequency protection characteristic between 4.5kHz and 15kHz can readily be accommodated to meet other domestic and overseas needs. Though the 222 is intended to provide basic final limiting, a ‘floating platform’ release characteristic yields sufficient program dynamics compression that often the unit can be run ‘barefoot’ between the console and transmitter with good results.”
These units are expensive! I’m looking for an alternative myself. Maybe some will chime in that uses another product with success..