Section 25: Engineering Specifications
FBX/Parametric Filters
Twelve independent digital notch filters per channel, controlled
automatically or parametrically from 20 Hz to 20 KHz, each switchable
between FBX fixed filters, FBX dynamic filters and parametric filters
Filter depth: user-controllable in 1dB steps from +12 dB to -84 dB
(parametric mode), 3 dB steps from 0 dB to -80 dB (FBX mode); max.
automatic depth adjustable from -6 to -80dB
Filter width: user-controllable from 9.99 octave to .01 octave
(parametric), 1.0 to .01 octave (FBX)
High pass filter, user-controllable in 1 Hz steps between 20Hz and
3KHz; 12 dB/octave roll-off
Low pass filter, user-controllable in 1 Hz steps between 1 KHz and 20
KHz; 12 dB/octave roll-off
Resolution: 1 Hz from 20 Hz to 20 KHz in FBX and parametric mode
Time required to find and eliminate feedback: user-controllable from 0.2
seconds to 1 second (typically 0.3 seconds).
Total number of combined filters active per channel: user-selectable, 0
- 12; plus low and high pass shelving filters
Filters controllable via table or graphic interface
Graphic Equalizer
31 digital filters on ISO center frequencies, width selectable from .5 to 1
octave in .01 octave increments, +12 to -15 dB boost & cut
Independent display and control or A & B channels, LINK or COPY
Real-Time Analyzer
31 band, 20 Hz — 20 KHz on ISO center frequencies
A, B, C or flat weighting
Fast/slow, peak/hold
Source selectable: reference mic, channels A or B, input or output
Reference mic input: ISO phantom power, +48VDC @ 10mA, 6.8K
Ohm impedance
Compressor/Limiter
Threshold: +32dBu to -30dBu in 0.5dB steps
Ratio: 1:1, 1.4, 2, 3, 4, 5, 6, 7, 8, 9, 10, 16, 32, infinite
Knee: 1 (hardest) to 40 (softest)
Attack: 1.0 to 99 msec in 1 msec steps
Release: .05 to 5 sec in .05 sec steps
Expander/Noise Gate
Threshold: -20dBu to -90.0dBu in 0.5dB steps
Ratio: 1:1, 1.4, 2, 3, 4, 5, 6, 7, 8, 9, 10, 16, 32, infinite
Knee: 1 (hardest) to 40 (softest)
Attack: 1 to 99 msec in 1 msec steps
Release: .05 to 5 sec in .05 sec steps
Digital Delay
1.38 - 83.28 milliseconds/channel in 20 microsecond steps
Automatic or User Programmable in feet or meters.
Password Configuration
5 numeric characters
Load & Recall Configurations & Response Curves
99 user defined
1 factory default
1 most recent configuration (power down save)
Front Panel
LCD Display
Clip, limit, signal and gate LEDs for channels A and B; clip and signal
LEDs for REF; MIDI, Serial & Digital LED indicators
Four menu/soft keys
More, Help & Enter keys
Data wheel and cursor keys
Input/Output
Input impedance: Balanced > 10K Ohms, PIN 2 high
Output impedance: Balanced 10 Ohms nominal, PIN 2 high
Input/Output maximum signal levels: Ba26 dBV peak
Max. output load: 600 Ohms balanced
Bypass: true power-off bypass
I/O connectors: XLR-3
Performance*
Frequency response: 10Hz to 20KHz, 0.2dB @ +22dBV
SNR**: > 105 dB (with ClipGuard)
THD: < 0.01% @ 22 dBV at 1 KHz
Dynamic range: > 110 dB (with ClipGuard)
Headroom: +22dB peak @ 4dBV nominal input
Power
50/60Hz available in 100V, 120V, 230V; 25W
Dimensions
2-U rack mount 19 x 3.5 x 9 in. (48.3 x 9 x 22.9 cm); 9 lb. (3.9 Kg)
Options
ADF-4SLU: Blank front panel two-channel slave unit for remote control
with your computer and POWER-Q for WIndows
DA-I/O: AES/EBU Digital I/O (add to standard analog)
Remote Control: Serial (RS232) remote control of POWER-Q for
Windows;
The POWER-Q ADF-4000 is compliant with all Year 2000 Y2K
standards.
Specifications subject to change without notice.
* Tests performed using an Audio Precision System One model 322 or
equal
** Signal-to-noise ratio is the ratio or the maximum undistorted signal
by specification (26dBV RMS sinewave) to the noise floor
One-year limited warranty
65
Section 25: Specifications
