Orban 9300 Touts Parametric Low-Pass Filter

Orban/CRL is promoting the digital Optimod-AM 9300 monophonic audio processor for AM radio stations.
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Orban/CRL is promoting the digital Optimod-AM 9300 monophonic audio processor for AM radio stations.

The company says it adds more versatile equalization and a parametric low-pass filter to its predecessor, and lets users trade off filter ringing against frequency response flatness.

Orban says this is important as more stations are reducing audio bandwidth voluntarily or because their HD-AM digital transmissions require it. The 9300 also features a dual-band AGC with window gating.

The Quick Setup function walks broadcasters through setup. The Less-More control allows the user to customize the 9300's presets. The company says audio processing experts will appreciate the new Advanced Control parameters (accessible from 9300 PC Remote software), which allow users to customize the 9300's sound to exact requirements.

The 9300 features a five-band limiter with distortion-canceling clippers. The audio is divided into five bands, then separately compressed and limited. Orban says five-band limiting operates more quickly than a wide-band compressor without causing audible side effects.

The company also recently released Optimod-FM 8500 Version 2 software, which it said exploits previously unused DSP power in the 8500.

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