OPTIMOD-AM 9400

Lebih Lengkap Mengenai OPTIMOD-AM 9400

For over 30 years, Optimod-AM has dominated the sound of major market AM radio. The 9400 distills all of Orban's experience into the best Optimod-AM ever! Orban's all-digital 9400 OPTIMOD-AM Audio Processor can help you achieve the highest possible quality in AM shortwave, medium wave and long wave broadcast sound. OPTIMOD-AM delivers louder, cleaner, brighter, FM like audio with an open, fatigue free quality that attracts listeners and holds them. OPTIMOD-AM was designed to deliver a high quality FM-like sound to the listener's ear by pre-processing for the limitations of the average car or table radio.

The 9400 supports iBiquity's HD AM® in-band on-channel digital radio system. The digital radio processing can also be used for simulcast netcast, DAB+, DRM or DRM+ digital broadcasts. Regardless of whether you have a major-market station or just want your station to sound like one, Optimod-AM 9400 is right for you.

The 9400 is suitable for long wave, medium wave, and shortwave (HF) broadcasts. OPTIMOD-AM rides gain over an adjustable range of up to 25dB, compressing dynamic range and compensating for operator gain-riding errors and for gain inconsistencies in automated systems. OPTIMOD-AM increases the density and loudness of the program material by multiband limiting and multiband distortion canceling clipping, improving the consistency of the station's sound and increasing loudness and definition without producing audible side effects. OPTIMOD-AM precisely controls peak levels to prevent over-modulation. Asymmetry in the analog processing channel is adjustable from 100% to 150% positive peak modulation.

OPTIMOD-AM compensates for the high- and low frequency roll-offs of typical AM receivers with a fully adjustable program equalizer providing up to 20dB of high-frequency boost (at 5 kHz) without producing the side effects encountered in conventional processors. This equalizer can thus produce extreme pre-emphasis that is appropriate for very narrow-band radios. OPTIMOD-AM's fully parametric low- and mid-frequency equalizers allow you to tailor your air your precise requirements and desires. OPTIMOD-AM also fully supports the NRSC standard pre-emphasis curve.

OPTIMOD-AM is a stereo processor that fully protects CQUAM® transmissions, conservatively complying with Motorola’s processing requirements that negative peak modulation on the left and right channels be limited to –75% modulation. The 9400 comes with a wide variety of factory presets to accommodate almost any user requirement. The user can readily modify these presets or customize them with easy one-knob LESS-MORE control. Modified presets can be stored and recalled on command. Advanced Control (accessible from the PC Remote application) facilitates detailed sound design using the same controls that were available to the factory programmers. Quick Setup guides you through 9400 setup for your primary analog AM transmitter. It is appropriate for users with modern transmitter plants and without special requirements such as setting up HD Radio processing or CQUAM AM stereo processing.

OPTIMOD-AM supports the iBiquity HD Radio® system, DAB+, DRM and DRM+ digital broadcast. Except for common stereo enhancement and AGC, the HD AM processor is an independent processing chain with its own set of user-adjustable parameters, maintaining 15 kHz audio bandwidth (per iBiquity's specifications) regardless of the bandwidth setting of the processing intended for the analog channel. To ensure source-to-source consistency, the digital radio processing includes full five-band compression/limiting that is independent of the five-band compression/limiting in the analog processing chain. This output can also be used for netcasts, cable, and satellite radio. Orban's PreCode™ technology manipulates several aspects of the audio to minimize artifacts caused by low bitrate codecs, ensuring consistent loudness and texture from one source to the next. There are several HD factory presets tuned specifically for low bitrate codecs. These presets have “LBR” in their names.

The 9400 controls the transmitted bandwidth of the analog channel to meet government regulations, regardless of program material or equalization. The high frequency bandwidth of the analog processing channel can be switched instantly in 500Hz increments between 4.5 kHz and 9.5 kHz (NRSC). The lower cutoff frequencies meet the output power spectral density requirements of ITU-R 328-5 without further low-pass filtering at the transmitter, while the 9.5 kHz filter meets the requirements of the NRSC-1 standard (North America). The 5.0 kHz filter makes the analog AM bandwidth compatible with HD AM transmission. The low-pass filters have parametric cutoff shapes, allowing you to trade off filter ringing against frequency response flatness.

OPTIMOD-AM compensates for inaccuracies in the pulse response (tilt, overshoot, ringing) of transmitters and antenna systems with a powerful four-parameter transmitter equalizer. A built in squarewave generator makes adjustment easy. Four sets of equalizer parameters can be stored and recalled, allowing you to program day and night variations for two transmitters. You can set equalization independently in the stereo sum and difference channels, facilitating adjustment in CQUAM AM stereo facilities. The 9400 includes analog and AES3 digital inputs. Two sets of analog stereo outputs and two AES3 outputs accommodate as many as four transmitters. Outputs can be switched independently to emit the analog-channel signal, the digital-channel signal, or a low-delay monitor signal suitable for talent headphones. Both the digital input and the two digital outputs are equipped with sample-rate converters and can operate at 32 kHz, 44.1 kHz, 48, 88.2, and 96 kHz sample rates. The output levels are separately adjustable for the analog and digital outputs. The 9400 is designed and certified to meet all applicable international safety and emissions standards.