Instrukcja obsługi Audio-Technica AT4050ST

Audio-Technica mikrofon AT4050ST

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40 series microphones
AT4050ST
Stereo Condenser Microphone
Features
• Innovativeside-addressMid-Sidestereomicrophoneengineered
 forprofessionalrecording,broadcastandsoundreinforcement
• Independentcardioidandgure-of-eightcondenserelements
• SwitchselectionofM-Smodeandtwointernallymatrixed
 stereomodes
• Dual-diaphragmcapsulesmaintainprecisepolarpatterndenition
 acrossthefullfrequencyrangeofthemicrophone
• Transformerlesscircuitryvirtuallyeliminateslow-frequency
 distortionandprovidessuperiorcorrelationofhigh-speedtransients
• The2-micron-thick,vapor-depositedgolddiaphragmsundergoa
 ve-stepagingprocesssothattheoptimumcharacteristics
 remainconstantoveryearsofuse
• Openacousticalenvironmentofthesymmetricalhousing
 assemblyminimizesunwantedinternalreections
• Customshockmountprovidessuperiorisolation
• Integral80Hzhigh-passlterswitchand10dBpadswitch
• State-of-the-artdesignandmanufacturingtechniquesensure
 compliancewithA-T’sstringentconsistencyandreliabilitystandards
Description
The AT4050ST is a stereo side-address externally polarized (DC bias)
condenser microphone with independent cardioid and gure-of-eight
elements congured in a Mid-Side arrangement with switch-selectable
internal matrixing. The microphone allows sound recordists the choice
of selecting a left-right stereo output (wide 127° or narrow 90°) via the
microphone’s internal matrixing system or choosing discrete Mid-Side
signals for later manipulation. It is designed to meet the most critical
acoustic requirements of professional recording, broadcast and sound
reinforcement.
The microphone requires 48V phantom power for operation.
The microphone includes a 5.0 m (16.5') dual output cable terminating
in a 5-pin XLRF-type to two standard 3-pin XLRM-type connectors. The
output of the microphone is a 5-pin XLRM-type connector.
The microphone is equipped with a switchable 10 dB pad and a switch
that permits choice of at response or low-frequency roll-off (via integral
80 Hz high-pass lter).
The microphone is enclosed in a rugged housing. The included AT8449
shock mount provides superior isolation and permits mounting on any
microphone stand with 5/8"-27 threads. A dust cover and a protective
carrying case are also included.
Operation and Maintenance
The AT4050ST requires 48V phantom power on Pins 2 and 3 of both
XLR3M-type connectors for operation. Wiring must be balanced
throughout, and all mic cables in the system must be wired consistently:
Pin 1-to-Pin 1, etc. If connecting to unbalanced inputs, good-quality
balanced line transformers must be used.
Mid-Side Operation: In M-S mode, the microphone provides independent
Mid and Side signals. This allows the width of the stereo image to be
adjusted in post production or in the eld with a matrix mixer.
Matrixed Stereo: The microphone offers two internally matrixed modes
which provide traditional “left-right” stereo without the need for external
mixers. To accommodate varying acoustic environments, the user may
select between a wide pattern (127°) with increased ambient pickup, and
a narrow pattern (90°) which offers more rejection and less ambience.
Output phase is “Pin 2 hot.”
For correct left-right stereo orientation, position the microphone so
the raised Audio-Technica emblem is facing the sound source. In the
internally matrixed modes, locating the microphone nearer the sound
source enhances the apparent width of the stereo image, while
decreasing room ambience. Moving away from the sound source will
result in a narrower stereo image and more room sound.
M-SOutput Connector Pin1 Pin2 Pin3
Mid XLR3M-Gray Ground Mid + Mid –
XLR5M Mic Connector: Pin 1 Pin 2 Pin 3
Side XLR3M-Red Ground Side + Side –
XLR5M Mic Connector: Pin 1 Pin 4 Pin 5
MatrixOutput Connector Pin1 Pin2 Pin3
Left XLR3M-Gray Ground L + L –
XLR5M Mic Connector: Pin 1 Pin 2 Pin 3
Right XLR3M-Red Ground R + R –
XLR5M Mic Connector: Pin 1 Pin 4 Pin 5
An integral 80 Hz high-pass lter provides easy switching from a at
frequency response to a low-end roll-off. The roll-off position reduces
the pickup of low-frequency ambient noise (such as trafc, air-handling
systems, etc.), room reverberation and mechanically coupled vibrations.
To engage the high-pass lter, slide the switch toward the “bent” line.
The microphone is also equipped with a switchable 10 dB pad that lowers
the microphone’s sensitivity, providing higher Max SPL capability for
exible use with a wide range of users and system congurations. To
engage the 10 dB pad, slide the switch toward the -10 position.
In use, secure the cable to the mic stand or boom, leaving a slack loop
at the mic. This will ensure the most effective shock isolation and reduce
the possibility of accidentally pulling the microphone out of its mount.
Avoid leaving the microphone in the open sun or in areas where
temperatures exceed 110° F (43° C) for extended periods. Extremely high
humidity should also be avoided.
Architect’s and Engineer’s Specications
The microphone shall be a side-address Mid-Side stereo design with two
independent externally polarized (DC bias) condenser elements. It shall
have cardioid and gure-of-eight polar patterns and a frequency response
of 20 Hz to 18,000 Hz. The microphone shall operate from an external 48V
DC phantom power source. It shall be capable of handling sound input
levels up to 149 dB (159 dB with 10 dB pad–mid and side) with a dynamic
range of 134 dB (mid), 132 dB (side). Nominal open circuit output voltage
shall be 15.8 mV (mid), 15.8 mV (side), 7.9 mV (stereo 90º), 8.9 mV (stereo
127º) at 1V, 1 Pascal. Output shall be low impedance balanced (50 ohms).
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
©2009 Audio-Technica U.S., Inc. audio-technica.com 0001-0259-00
AT4050ST
Specications
mid frequency response:
20–18,000 Hz
12" or more on axisLEGEND
Frequency in Hertz
Response in dB
10 dB
100
50 200 10k5k1k500 2k 20k
Roll-off
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
SCALE IS 5 DECIBELS PER DIVISION
240˚
180˚
210˚
270˚
300˚
330˚ 0˚
150˚
120˚
90˚
30˚
60˚
LEGEND
1 kHz
SCALE IS 5 DECIBELS PER DIVISION
240˚
180˚
210˚
270˚
300˚
330˚
0˚
150˚
120˚
90˚
30˚
60˚
LEGEND
1 kHz
SCALE IS 5 DECIBELS PER DIVISION
240˚
180˚
210˚
270˚
300˚
330˚
0˚
150˚
120˚
90˚
30˚
60˚
90º
polar pattern
127º
polar pattern
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
SCALE IS 5 DECIBELS PER DIVISION
240˚
180˚
210˚
270˚
300˚
330˚
0˚
150˚
120˚
90˚
30˚
60˚
side
polar pattern
mid
polar pattern
Externally-polarized (DC bias) condenser
Cardioid, Figure-of-eight
20-18,000 Hz
80 Hz, 12 dB/octave
Stereo, 90º: –42 dB (7.9 mV), re 1V at 1 Pa
Stereo, 127º: –41 dB (8.9 mV), re 1V at 1 Pa
Mid: –36 dB (15.8 mV), re 1V at 1 Pa
Side: –36 dB (15.8 mV), re 1V at 1 Pa
50 ohms
149 dB SPL, 1 kHz at 1% T.H.D.;
159 dB SPL, with 10 dB pad (nominal)
Stereo, 90º: 25 dB SPL; Stereo, 127º: 16 dB SPL;
Mid: 15 dB SPL; Side: 17 dB SPL
Mid: 134 dB, 1 kHz at Max SPL
Side: 132 dB, 1 kHz at Max SPL
Stereo, 90º: 69 dB, 1 kHz at 1 Pa
Stereo, 127º: 78 dB, 1 kHz at 1 Pa
Mid: 79 dB, 1 kHz at 1 Pa
Side: 77 dB, 1 kHz at 1 Pa
48V DC, 6.4 mA typical – both channels total
90º, 127º, M-S; Flat, roll-off;
10 dB pad (nominal)
517 g (18.2 oz)
193.0 mm (7.60") long,
53.4 mm (2.10") maximum body diameter
Integral 5-pin XLRM-type
5.0 m (16.5') long, 8-conductor, shielded,
vinyl-jacketed stereo cable with 5-pin
XLRF-type connector at microphone end
and two 3-pin XLRM-type connectors at
output end
R1
AT8449 shock mount for 5/8"-27 threaded
stands; 5/8"-27 to 3/8"-16 threaded adapter;
microphone dust cover; protective carrying
case
Elements
Polar patterns
Frequency response
Low frequency roll-off
Open circuit sensitivity
Impedance
Maximum input sound level
(Mid and Side)
Noise1
Dynamic range (typical)
Signal-to-noise ratio1
Phantom power requirements
Switches
Weight
Dimensions
Output connector
Cable
Audio-Technica case style
Accessories furnished
In the interest of standards development, A.T.U.S.
offers full details on its test methods to other industry
professionals on request.
1 Pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL
1 Typical, A-weighted, using Audio Precision System One.
Specications are subject to change without notice.
The output of the microphone shall be a 5-pin XLRM-type connector. A
5.0 m (16.5') cable with a 5-pin XLRF-type to two standard 3-pin XLRM-
type connectors shall be included.
The microphone shall be equipped with a switchable 10 dB pad and
a switch that permits choice of at response or 80 Hz low-frequency
roll-off. It shall also include switch selection of non-matrixed M-S mode
and two internally matrixed left-right stereo modes. The M-S mode shall
provide independent Mid and Side signals. The two internally matrixed
modes shall provide traditional “left-right” stereo with the choice of wide
(127°) and narrow (90°) pickup patterns.
The microphone shall be 193.0 mm (7.60") long and have a diameter of
53.4 mm (2.10"). Weight shall be 517 g (18.2 oz). The microphone shall
include a shock mount, a dust cover, and a protective carrying case.
The Audio-Technica AT4050ST is specied.

Specyfikacje produktu

Marka: Audio-Technica
Kategoria: mikrofon
Model: AT4050ST

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