The AIRcorp Model 500TV microphone processor was designed to solve the most common audio miking problems found in today's TV studios and on remote locations.
The Model 500TV's complementary compressor and expander sections maintain a predictable level of loudness for the air talent, while virtually eliminating adjacent microphone crosstalk and room noise. Dynamic control coupling eliminates "hollow room" flanging effects. Multiple microphones can be on simultaneously. The three-band equalizer is especially configured to address the problems presented by off-axis and partially obscured lavalier microphones, as well as normal booth miking. In addition, the Model 500TV's "electronic wind screen" allows the device to process spoken word and ignore high levels of ambient noise and rumble without coloring the processed material.
AIRcorp's Model 500TV can accomodate any commonly used dynamic, condenser, or ribbon microphone, and it can also be fed by line level program switchers and production consoles, making it the most versatile dedicated speech processor available to Audio-for-Video professionals. .
More exclusive Model 500TV features:
- Front panel selection of input level in four ranges, +4dB to -50dB. Remotely controllable.
- Three section variable boost and cut equalizer compensates for off-axis microphone response..
- Complementary compressor/expander provides level control without noise rush-up.
- Phase reverse switch corrects phase errors instantly. Remotely controllable..
- Integral +48 Vdc "phantom power" for condenser microphones.
- Simultaneous microphone level and line level outputs available..
- De-esser suppresses excessive sibilance without coloration of normal signals. Remotely controllable.
- Servo-balanced outputs eliminate ground loops in any installation.
- Buffered headphone jack permits setup without on-air interruptions.
- DB-25 connector extends all logic functions for remote control.
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Input type Input connector Input impedence: Input CMRR (50 Hz - 20 kHz) EIN @50 dB gain Input gain range
Input adjustment range Maximum input level
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Balanced differential transformerless 3-pin XLR female 13.6 kOhm > 40 dB -127 dB typical with 150 Ohm
source Nominally, +50 to -4 dB, selectable in four steps ± 20 dB from indicated input level +26 dB
Ref .775 Vrms (15.5 Vrms)
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Output type Output connectors Line output impedance Microphone output impedance Line maximum output level
Microphone output level Line output residual noise and hum Usable dynamic range Quiescent distortion @ unity
gain
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Servo-balanced transformerless line driver and resistive balanced attenuator for microphone level output
3-pin XLR male 100 Ohm balanced, 50 Ohm unbalanced 150 Ohm, resistive +26 dBm 600 Ohm -30 dB into 150 Ohms
maximum -80 dB Ref .775 Vrms typical (20 kHz) > 100 dB .02% 1 kHz THD typical .05% SMPTE IMD typical
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Processor type Compressor attack time Compressor ratio Compressor release time Compressor threshhold
Expander attack time Expander slope Expander release time Compressor/Expander sidechain rumble -----filter
breakpoints De-esser sidechain breakpoint
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Feedforward compressor with interactive expander and sidechain equalized de-esser 10 ms typical,
program-dependent Nominally 4:1 40 dB/s to 4 dB/s, continuously variable -10 Vu, nominally -6 dB Ref .775
Vrms Identical to compressor 2:3 @ 30 dB Range setting or less 1:2 at Range > 30 dB Tracks compressor
release Selectable 180 Hz, 90 Hz, and flat via rear panel switch Typically 2 kHz
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First-order variable boost and cut series bandpass sections with a two-pole all-pass follower for reducing
waveform asymmetry ±20 dB typical Nominally 140 Hzz Nominally 400 Hzz Nominally 7 kHzz
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Mains input Mains connector Power consumption High voltage breakdown rating Phantom (parallel) microphone
power -----supply output
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115/230 Vac 50/60 Hz ±10% IEC appliance input connector per IEC 320 15VA maximum Transformer wound on
VDE/IEC approved bobbin and certified @ 4 kv Nominally +48 Vdc @ 6 mAdc
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MECHANICAL
The Model 500TV is housed in a steel and aluminum1.75" x 16.5" enclosure. A rack mounting kit is included for
installation into standard 19" equipment racks.
NOTES
0 dB and 0 dB ref .775 Vrms refers to 0 Vu at 0.775 Volts rms
0 dBm referes to 0 Vu at a power level of 1 mW into 600 Ohm
Noise measurements are made using an rms-responding meter in a 20 kHz corrected noise bandwidth
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