Audio-Technica U851RW Bedienungsanleitung

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• Designed for surface-mount

applications such as high-

quality sound reinforcement,

professional recording,

television, conferencing and

other demanding sound pickup

situations

• PivotPoint™rotating output

connector allows cable to exit

from either the rear or the

bottom of the microphone

• Superior off-axis rejection for

maximum gain before

feedback

• UniGuard™RFI-shielding

technology offers outstanding

rejection of radio frequency

interference (RFI)

•Self-contained electronics eliminate need for external power

module

•Small-diameter UniPoint capsule near boundary eliminates phase

distortion and delivers clear, high-output performance

•Heavy die-cast case and non-slip silicon foam bottom pads

minimize coupling of surface vibration to the microphone

•Low-profile design with low-reflectance finish for minimum

visibility

•Available in two colors:black (U851R) and white (U851RW)

The U851R requires 11V to 52V phantom power for operation.

Supplied as a cardioid, the U851R accepts interchangeable

elements to permit selection of angle of acceptance from 100° to

360°.

The microphone should be placed on a flat,

unobstructed mounting surface, with the front

of the microphone facing the sound source.

The sound source should not be below, or

higher than 60° above, the plane of the

mounting surface.

Output is low impedance (Lo-Z) balanced.The signal appears

across Pins 2 and 3;Pin 1 is ground (shield). Output phase is “Pin 2

hot”– positive acoustic pressure produces positive voltage at Pin 2.

An integral 80 Hz high-pass filter provides easy switching from a flat

frequency response to a low-end roll-off.The roll-off position

reduces the pickup of low-frequency ambient noise (such as traffic,

air-handling systems, etc.), room reverberation and mechanically

coupled vibrations.

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.

NOTE: Audio-Technica has developed a special RFI-shielding

mechanism, which is an integral part of the connectors in the

UniPoint line.If you remove or replace the connectors, you may

adversely affect the unit's RFI immunity.

NOTE: Placing any object on a surface (such as a conference table)

before its finish is fully cured may result in damage to the finish.

8 kHz

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

200 Hz

1 kHz

5 kHz

Frequency in Hertz

LEGEND 12" or more on axis

Roll-off

Frequency Response

Response in dB

Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224

Audio-Technica Limited, Old Lane, Leeds LS11 8AG England

www.audio-technica.com

P51702 ©2005 Audio-Technica U.S., Inc. Printed in U.S.A.

U851R/U851RW

U851R/U851RW SPECIFICATIONS†

ELEMENT Fixed-charge back plate

permanently polarized condenser

POLAR PATTERNHalf-cardioid

(cardioid in hemisphere above

mounting surface)

FREQUENCY RESPONSE30-20,000 Hz

LOW FREQUENCY ROLL-OFF80 Hz, 18 dB/octave

OPEN CIRCUIT SENSITIVITY–34 dB (19.9 mV) re 1V at 1 Pa*

IMPEDANCE 200 ohms

MAXIMUM INPUT SOUND LEVEL134 dB SPL, 1 kHz at 1% T.H.D.

DYNAMIC RANGE (typical)108 dB, 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO168 dB, 1 kHz at 1 Pa*

PHANTOM POWER 11-52V DC, 4 mA typical

REQUIREMENTS

SWITCH Flat, roll-off

WEIGHT 9.2 oz (262 g)

DIMENSIONS 4.25" (108.0 mm) long,

3.31" (84.0 mm) maximum width,

0.91" (23.0 mm) height

OUTPUT CONNECTORTB3M-type

CABLE 25.0' (7.6 m) long, 0.13" (3.2 mm)

diameter, 2-conductor, shielded

cable with TA3F and XLRM-type

connectors

OPTIONAL INTERCHANGEABLE UE-H hypercardioid (100°)

ELEMENTS UE-O omnidirectional (360°)

ACCESSORY FURNISHEDSoft protective pouch

†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

1Typical, A-weighted, using Audio Precision System One.

Specifications are subject to change without notice.

CARDIOID CONDENSER

BOUNDARY MICROPHONES

60°

IDEAL

WORKING

ANGLE

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