OPTIMOD-FM 8600Si

Lebih Lengkap Mengenai OPTIMOD-FM 8600Si

Optimod-FM 8600 was a hit as soon as it was introduced. Compared to Orban’s previous flagship, the 8600’s dramatically improved “MX” peak limiter technology decreased distortion while increasing transient punch and high frequency power handling capacity. A significant number of broadcasters have asked us to make the 8600’s sound available in a compact package at a lower price. Orban’s response is the 8600Si, which offers 8600-class sound in a single rack unit. An efficient, switching power supply ensures that the 8600Si runs cool even in a crowded rack. The 8600Si includes simultaneous processing for FM and for digital transmissions like netcasts, DAB+ and HD Radio. 

The 8600Si provides stereo enhancement, equalization, AGC, multiband compression, low-IM peak limiting, stereo encoding, and composite limiting — everything that even the most competitive major market station needs to stand out on the dial. More than 20 excellent sounding, format specific factory presets get you started. You'll find all of your favorite 8500 presets, plus the 8600 "MX" presets designed by Bob Orban and Greg Ogonowski to exploit the exciting possibilities inherent in the 8600Si's peak limiter technology. Although the factory presets are fully competent "out of the box”. You can customize them with easy one-knob LESS-MORE control. Full Control gives you the versatility to customize your audio further. Orban’s Quick setup, which is a guided sequence of screens through the 8600Si‘s setup, is the easiest way to have your station On Air quickly.
 

Improved Peak Limiter Technology:
Dramatically improved peak limiter technology decreases distortion while increasing transient punch and high frequency power handling capacity. Compared to the FM-channel peak limiter in OPTIMOD-FM 8500, the new peak limiter typically provides 2.5 to 3 dB more power at high frequencies, which minimizes audible HF loss caused by pre-emphasis limiting. Drums and percussion cut through the mix. Highs are airy. "Problem material" that used to cause audible distortion is handled cleanly.  While this design offers about the same loudness as 8500 processing, its main goal is to make FM analog broadcasts more competitive with the cleanliness, punch, and open high frequencies of the digital media against which FM analog transmissions now battle. The FM loudness wars represent 20th-century thinking; in the 21st century, the new competition is digital media. Thanks to its fresh, crisp sound, the 8600Si helps level the playing field between analog FM and its ever more aggressive digital-only competitors.
 

Diversity Delay:
For Digital Radio broadcasters who prefer using a separate processor for the digital channel, the 8600Si's built-in delay (up to 16 seconds) in the analog processing path vastly improves installation versatility in HD Radio facilities, freeing you from the need to use the delay line built into the Digital Radio exciter. This allows you to use the 8600Si's built-in stereo encoder and composite limiter to drive the analog FM transmitter, ensuring no-compromise analog-channel loudness.
 

Independent Processing:
The 8600Si’ HD (“Digital Radio”) output is designed to feed streaming, netcasting, and digital satellite or cable radio channels, which can be Eureka 147, DRM, DAB + or the iBiquity® HD Radio system (formerly known as “IBOC”—“In-Band On-Channel”) approved for use in the United States. The equalizer and five-band compressor/limiter in the digital processing chain have their own sets of user-adjustable audio controls that are independent of the controls in the FM analog transmission chain’s equalizer and five-band compressor/limiter. The bottom line? Processing that optimizes the sound of your FM channel while punching remarkably crisp, clean, CD-like audio through to your digital channel audience.
 

Loudness and True Peak control:
The digital radio and analog radio processing chains offer ITU-R BS.1770-3+ Loudness Meters and Safety Limiters for use in countries that enforce a BS.1770 loudness limit on digital and/or analog radio broadcasts. The 8600Si implements “true peak control” in the HD processing chain by oversampling the HD peak limiter’s sidechain at 256 kHz. This allows the 8600Si to prevent clipping in a playback device’s analog signal path by predicting and controlling the analog peak level follow the playback device’s reconstruction filter to an accuracy of better than 0.5 dB. For typical program material, accuracy is 0.2 dB. Without true peak control, analog clipping can occur even if all peak values of the digital samples are below 0 dBFS. This phenomenon has also been termed “0 dBFS+.” Thanks to true peak control, sample rate conversion, unless it removes high frequency program energy or introduces group delay distortion, cannot cause sample peaks to increase more than 0.5 dB.