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Total Harmonic Distortion ( measured at VCA output, OPERATE mode, RELEASE
TIME control centered): Less
than
0.1%,
200-15,000Hz, + 10
to - 15dB
gain
reduction
Available Gain Reduction: 25dB
Metering: Three dB- linear edgewise- reading gain reduction meters
TOTAL
is
true
peak- reading
with
electronic
acceleration
and
peak- hold
(+10 to - 15dB);
LIMITING
indicates
fast
peak
limiting
component
of
gain
reduction ( 0-5dB)
COMPRESSION
indicates
slow
compression
component
of
gain
reduction
(+10 to - 15dB)
Gain Control Element: True
VCA.
Proprietary
Class- A
design
eliminates
crossover
notch
distortion,
modulation
noise,
and
slewrate
limiting
found
in
competitive Class- AB designs.
"Bass" Band Compressor Characteristics
Attack Time: program- controlled; not adjustable
Release Time: program- controlled;
not
adjustable.
Incorporates
delayed- release
distortion reduction.
Total Harmonic Distortion ( at VCA output, OPERATE mode):
Less than 0.1% THD, 50-200Hz, + 10 to - 20dB gain reduction
Available Gain Reduction: 30dB
Metering: single dB- linear edgewise- reading gain reduction meter (+ 10 to - 20dB).
Gain Reduction Element: Proprietary Class- A true VCA
Bass Coupling ( U.S. patent # 4,249,042): Enables
gain
of " Bass"
band
to
track
gain of " Master" band to any degree, from identical tracking to fully independent
operation. Adjustable with BASS COUPLING control.
Crossover Characteristics
Control: 6dB/octave U200Hz;
Program: 12dB/octave
r
.
à 200Hz
in
unique " distributed
crossover"
configuration
(U.S. patent # 4,249,042)
High Frequency Limiter Characteristics
Attack Time: approximately 5ms
Release Time: approximately
20ms.
Delayed
release
included
for
distortion
reduction.
Mode: Left and right channels operate independently to avoid high frequencies in
one channel causing audible timbre modulation of opposite channel.
Control Element: Junction FET
Metering: Two LED's indicate HF limiting in L and R channels.
Threshold of FIF Limiting: User- adjustable
over
3dB
range
to
meet
format
requirements
Hilbert- Transform Clipper Characteristics
Nominal Bandwidth: 15.4kHz
Distortion Characteristics: Less
than
2.5%
THD
is
produced
by
individual
frequencies 30-4000Hz when driving the Hilbert- Transform Clipper to 6dB beyond
its
threshold of limiting. With drive frequencies above 4kHz, the characteristics
revert
to
those
of
a very " hard"
conventional
clipper.
Further
distortion
cancellation
assures
that,
for
any
arbitrary
input ( including
program
material),
distortion components in the frequency range from 0-2.2kHz are cancelled better
than 30dB below overshoot compensator threshold ( patent pending).
Delay Correction: Fourth- order allpass
Amount of Clipping: User- adjustable
over
6dB
range
to
match
format
requirements.
L-2
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