Shipping Dimensions:23 x 16 x 2 in
-Meets US (NRSC-compliant) and overseas AM transmission specifications
-Separate pre-emphasis protection limiter
-Active multipole low-pass filtering
-Feedforward Pulse-Width-Modulation (PWM)
-Built-in asymmetrical peak controllerThe 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. (PWM) control.