OPTIMOD-FM 8700i
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Lebih Lengkap Mengenai OPTIMOD-FM 8700i
OPTIMOD-FM 8700i is Orban’s flagship
processor. Featuring versatile five-band and two-band processing for
both analog FM transmission and digital media, the 8700i provides the
industry’s most consistent sound, track-to-track and source-to-source.
This consistency allows you to create a sonic signature for your station
with the assurance that your signature will stay locked in, uniquely
branding your sound.
OPTIMOD-FM 8700i is Orban’s flagship
processor. Featuring versatile five-band and two-band processing for
both analog FM transmission and digital media, the 8700i provides the
industry’s most consistent sound, track-to-track and source-to-source.
This consistency allows you to create a sonic signature for your station
with the assurance that your signature will stay locked in, uniquely
branding your sound.
The 8700i builds on 8600 V4’s outstanding
reliability and industry-leading sound quality. It adds Ravenna
audio-over-IP connectivity (100% AES67 compliant) and a hot-swappable,
dual-redundant power supply with automatic failover. A digital MPX
output using a 192 kHz AES3 connection is now standard, as are two
digitized SCA inputs. A new program-adaptive subharmonic synthesizer
ensures punchy bass, even with older program material. An important
feature is a phase skew corrector/multipath mitigator that ensures crisp
reception when receivers blend to mono and minimizes energy in the
stereo subchannel without compromising separation. The phase skew
corrector uses a proprietary multidimensional processing algorithm that
can simultaneously correct multiple phase problems, like a combination
of analog tape gap skew and comb filtering caused by multiple-microphone
pickup of a single instrument in the original recording session.
Orban’s
exclusive MX peak limiter technology decreases distortion while
increasing transient punch and high frequency power handling capacity.
Compared to the 8500’s limiter, the MX 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.
The 8700i’s 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 crisp, punchy sound, the 8700i helps level the playing
field between analog FM and its ever more aggressive digital-only
competitors.
The 8700i offers 8500-style processing presets too.
Because the input/output delay of the MX peak limiter is too long to
permit talent to monitor off-air on headphones, 8500-style is useful for
remotes and outside broadcasts where off-air headphone monitoring is
desired and the 8700i’s low-delay monitor output cannot be brought to
the talent.
In addition to subharmonic synthesis and phase skew
correction , the 8700i provides stereo enhancement, HF 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.
Processing
for digital media like DAB+, netcasts and HD Radio™ is supplied
standard. The FM and digital media processing paths split after the
8700i’s stereo enhancer and AGC. There are two equalizers, multiband
compressors and peak limiters, allowing the analog FM and digital media
processing to be optimized separately. 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.
Features:
-Frequency Response (Bypass Mode; Analog Processing
Chain): Follows standard 50µs or 75µs pre-emphasis curve ±0.10 dB, 2.0
Hz - 15 kHz. Analog left/right output and Digital output can be user
configured for flat or pre-emphasized output.
-Sample Rate: 64 kHz to 512 kHz, depending on processing being performed.
-Noise: Output
noise floor will depend upon how much gain the processor is set for
(Limit Drive, AGC Drive, Two-Band Drive, and/or Multiband Drive), gating
level, equalization, noise reduction, etc. It is primarily governed by
the dynamic range of the A/D converter, which has a specified
overload-to–noise ratio of 110 dB. The dynamic range of the digital
signal processing is 144 dB.
-Total System Distortion (de-emphasized,
100% modulation): <0.01% THD, 20 Hz - 1 kHz, rising to <0.05% at
15 kHz. <0.02% SMPTE IM Distortion.
-Total System Separation: > 55 dB, 20 Hz - 15 kHz; 65 dB typical.
-Polarity
(Two-Band and Bypass Modes): Absolute polarity maintained.
Positive-going signal on input will result in positive-going signal on
output when HD Polarity and FM polarity controls are set to POSITIVE.
-Peak
Control at HD Output: The peak limiter is oversampled at 256 kHz,
yielding a worst- case overshoot of 0.5 dB at the analog output and for
all output sample rates. (To achieve this performance at 32 kHz output
sample rate, it is necessary to set the 8700i’s HD lowpass filter cutoff
frequency to 15 kHz.)