RDL ST-MX2 Bedienungsanleitung

RDL Stabmixer ST-MX2

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STICK-ON® SERIES
Model ST-MX2
Universal Audio Mixer
Two Input Audio Mixing
Selectable Mic or Line Level Inputs
Simultaneous Mic and Line Outputs
Add Additional Inputs to an Existing Mixer
Audio Output Dual-LED VU Metering
Balanced or Unbalanced Inputs and Outputs
Low Noise and Low Distortion Performance
The ST-MX2 is part of the group of versatile STICK-ON products from Radio Design Labs. STICK-ONs feature the advanced circuitry for which
RDL products are known, combined with unequalled versatility in mounting possibilities. The durable adhesives provided with the ST-MX2 permit
permanent or removable mounting. Numerous available mounting accessories, brackets, rack-mount and tabletop chassis are optionally available
to facilitate any system. STICK-ONs are designed, built and rated for continuous duty in professional A/V systems.
FUNCTIONAL DESCRIPTION: The ST-MX2 is a two channel audio mixer. Each input channel is identical. Pin
jumpers adjacent to each audio input permit the installer to set that input for either mic or line level. The mic input
accepts low impedance balanced microphones (150 nominal) or high impedance unbalanced microphones
(5- -knominal). The line inputs are 20 k bridging and accept either unbalanced or balanced audio signals.
A single-turn trimmer is provided for each input channel. The usual range of mic or line level signals may be adjusted
to produce +4dBu at the line level output. The dual LED audio meter provides accurate dynamic level adjustment
without an external meter. A separate mic level output is also provided.
The dual LED output meter follows standard VU ballistics. A green LED illuminates at 15 dB below +4 dBu.
The intensity of the green LED progresses from minimum at -11 dBu to full intensity at +4 dBu. The adjacent red LED
illuminates at +4 dBu. The audio may be adjusted for maximum intensity of the green LED. Flashing of the red LED
is equivalent to a VU meter needle swinging above the 0 level.
Unbalanced audio inputs are converted in the module to balanced. Mic level inputs are preamplified to line level.
Either input may be turned down if it is not used. The combination of input levels, individual input adjustments and
output levels makes the ST-MX2 suited to a wide variety of mixing, summing, preamplification and audio format
conversion applications.
TYPICAL APPLICATION: The ST-MX2 is used in any application requiring mixing of two audio sources. A mic may
be mixed with a line level music source. Two mics may be mixed to feed the mic or line level input of a power
amplifier in a meeting room or choir loft. A mic or professional +4 dBu line level mono sum is possible from stereo
CD players, cassette decks, computer sound cards, televisions, and a wide variety of other unbalanced sources. If a
single input channel is used, the ST-MX2 may be used to convert mono line level signals from consumer to
professional, or from professional to consumer format. It may also be used as a microphone preamplifier, or
conversely to adapt unbalanced or balanced line level signals into the microphone input of other equipment.
The audio clarity, low noise, low distortion and versatility make this module ideally suited to a wide variety of
demanding audio applications. Use this module individually, or in conjunction with other RDL modules as part of a
high quality, flexible audio/video system.
RDL
659 6th St.
Prescott, AZ., USA 86301
(928) 443-9391
FAX (928) 443-9392
www.rdlnet.com
STICK-ON® SERIES
Model ST-MX2
Universal Audio Mixer
TYPICAL PERFORMANCE
Inputs (2): Selectable mic or line
Input range for +4 dBu output:
Mic: -45 dBu to -65 dBu; max input: -28 dBu
Line:
-18 dBV to +10 dBu max input: +22 dBu
Input impedance: Mic: 200 ; Line: 20 k bridging
Input or output configuration: Balanced or unbalanced
Outputs (2): MIC and LINE
Output impedance: 150 (mic or line)
Frequency Response:
Mic: 25 Hz to 50 kHz (± 1 dB)
Line: 10 Hz to 30 kHz (± 0.25 dB)
THD+N:
Mic: < 0.05% (25 Hz to 20 kHz)
Line: < 0.005%
IMD: < 0.004%
Output Level: Mic: -45 dBu; line: +4 dBu
Headroom:
Mic Input: > 22 dB (rel. –50 dBu)
> 32 dB (rel. –60 dBu)
Line Input: > 18 dB (rel. +4 dBu)
Output: > 20 dB (rel. +4 dBu)
Noise (below +4 dBu):
Mic: < -70 dB (150 Ω source, 50 dB gain),
< -80 dB (200 Ω source, 50 dB gain)
Line: < -90 dB (reference +4 dBu, unity gain)
CMRR:
Mic: > 65 dB (50 Hz to 120 Hz)
Line: > 45 dB (50 Hz to 120 Hz)
Ambient Operating Environment: 0° C to 55° C
Power Requirement: GROUND REFERENCED,
24 Vdc @ 60 mA
Installation/Operation
Declaration of Conformity available from rdlnet.com.
Sole EMC specifications provided on product package.
Specifications are subject to change without notice.
891-1075C
Radio Design Labs Technical Support Centers
U.S.A. (800) 933-1780, (928) 778-3554; Fax: (928) 778-3506
Europe [NH Amsterdam] (++31) 20-6238 983; Fax: (++31) 20-6225-287

Produktspezifikationen

Marke: RDL
Kategorie: Stabmixer
Modell: ST-MX2

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