Audio-Technica AT871UG Manual de Usario

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UNIDIRECTIONAL CONDENSER
BOUNDARY MICROPHONE
- Designed for surface-mount
applications such as high-quality
sound reinforcement, professional
recording, television, conferencing
and other demanding sound
pickup situations.
- UniGuardTM RFI-shielding
technology offers outstanding
rejection of radio frequency
interference(RFI).
- Superior off-axis rejection for
maximum gain before feedback.
- Small-diameter UniPoint capsule near boundary eliminates phase
distortion and delivers clear, high-output performance.
- Heavy die-cast case and non-silp silicon foam bottom pads
minimize coupling of surface vibration to the microphone.
- Low-prole design with low-reectance nish for minimum visibility.
- AT871UG has contained electronics eliminate need for external
power module.
- The AT871UG requires 9V to 52V phantom power for operation
only.
Supplied as a cardioid, AT871UG accepts interchangeable elements
to permit selection of angle of acceptance from 100 to 360° °.
Positioning a properly designed miniature cardioid microphone
centrally on a large, at, unobstructed surface yields several distinct
advantages. Directionality is increased by 3dB, promoting enhanced
gain before feedback and further suppression of ambient noise.
Sensitivity is increased for improved signal to noise ratio. Phase
distortion due to reflected sound energy from boundary itself is
eliminated.
The microphone should be placed on a at,
unobstructed mounting surface, with the
front of the microphone facing the sound
source. The sound source should not be
below, or high than 60 above, the plane of °
the mounting surface.
Output from XLRM-type connector 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.
Avoid leaving the microphone in the open sun or in areas where
temperatures exceed 43 C for extended periods. Extremely high °
humidity should also be avoided.
FORM No. ATGC-L0173-10-E
Machida Tokyo Japan
SPECIFICATIONS
ELEMENT Fixed-charge back plate
permanently polarized condenser
POLAR PATTERN Half-cardioid (cardioid in hemisphere
above mounting surface)
FREQUENCY RESPONSE 30-20,000 Hz
OPEN CIRCUIT SENSITIVITY -33 dB (19.9 mV) re 1V at 1 Pa
IMPEDANCE 200 ohms
MAXIMUM INPUT SOUND LEVEL 130 dB SPL, 1 kHz at 1% T.H.D.
DYNAMIC RANGE (typical) 103 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO 67 dB, 1 kHz at 1Pa
PHANTOM POWER REQUIREMENTS 9-52V DC, 2 mA typical
WEIGHT (less cable) 415 g
DIMENSIONS 120.0 mm - maximum width,
145.0 mm - maximum length,
17 mm - height
OUTPUT CONNECTOR TB3M-type
CABLE 7.6m long, 3.2mm diameter, 2-con-
ductor shielded cable with TA3F-type
connector and XLRM-type connectors.
OPTIONAL INTERCHANGEABLE
ELEMENTS
AT853H-ELE hypercardioid (100°)
AT853C-ELE cardioid (120°)
AT853SC-ELE subcardioid (170°)
AT853O-ELE omnidirectional (360°)
ACCESSORIES FURNISHED Soft protective pouch
IDEAL
WORKING
ANGLE
10 dB
20k10k5k2k1k50020010050
8 kHz
200 Hz
1 kHz
5 kHz
330°
300°
270°
240°
210°
180°
150°
120°
90°
60°
30°
Polar Pattern
Frequency Response
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
Frequency in Hertz
LEGEND 12” or more on axis
Response in dB
Optional Accessories:
AT8201 line matching transformer (Lo-z to
50,000 ohms)
AT8202 adjustable in-line attenuator for
use with balanced Lo-Z microphones.
AT8506 four-channel 48V phantom power
supply (AC powered).
AT8801/EU single-channel 48V phantom
power supply (AC powered).
10 dB
20k10k5k2k1k50020010050
8 kHz
200 Hz
1 kHz
5 kHz
330°
300°
270°
240°
210°
180°
150°
120°
90°
60°
30°
指向特性
频率特性
声压曲线 1刻度5 dB
频率
频率 (赫兹)
电平 平直
响应电平 (dB)
FORM No. ATGC-L0173-10-C
Machida Tokyo Japan
单指向性平面式电容话筒
- 设计在平面放置应用,提供高
及其他高要求的收音应用。
- UniGuard - 射频干扰(RFI)
- 半球形单一指向性,可抑制后
方杂音而清楚地在前方收音。
- 细小的UniPoint系列收音头,可消除反射式相位失真,并提
供清晰及高信号的音频输出。
- 平放不显眼的设计,并涂上低反光的颜色涂料。
- 棉 可
- 平放不显眼的设计,并涂上低反光的颜色涂料。
- AT871UG 内置话筒前置放大器供电组件,无需使用外置供
- AT871UG 话筒只作直流9V
52V 幻象供电操作。
标准为心形指向配置,但可选配适合的收音头更换配合实际的
100°360°
特别的平面设计,将话筒放置在一个宽阔平面的中央位置上,可
因声音的反射效果而使音量增加 ,并同时提高讯噪比及能减3dB
低因相位移动而形成的失真,改善音质。
话筒应放置在平面上 及没有阻碍
物的环境使用 音源应在话筒的前
方发声 理想的收音角度应在平面
60°高度之内。
阻抗平衡频输, 音频号最终以农公 2
3号针脚输出,而1号针脚则为地线(屏蔽)连接。
相位电平设于2号针脚上。
把话筒暴露于高温中可能导致输出电平逐渐及永久性减弱,应避
免将话筒留在日晒的地方或长时间置于温度超过43°C的地方,而
极高湿度也应避免。
技术指标
收音头 固定充电背板,静电型电容式
指向特性 半球形心形单指向性
频率响应 30-20,000 Hz
开通灵敏度 -34 dB (19.9 mV) 1V 1 Pa
输出阻抗 200 欧姆
最大承受声压 133 dB, 1 kHz 1% T.H.D.
动态范围 (典型) 103 dB, 1 kHz 于最高声压
讯噪比 67 dB, 1 kHz 1Pa
幻象供电 直流 9-52V,耗电 2 mA 典型
重量 415
外形尺寸 120.0 mm - 最大寬度,
145.0 mm - 最大长度
17 mm -
输出连接器 TB3M-3针卡农公座
连接线 7.6m 长,3.2 mm 直径连接线,2
蕊线连屏蔽电线,以TA3F插头连接
3针卡农公头插头
可转换收音头 AT853H-ELE 超心形指向 (100°)
AT853C-ELE 心形指向 (120°)
AT853SC-ELE 准心形指向
(170°)
AT853O-ELE 全方向性 (360°)
附属品 保護袋
理想的
收音角度
选择配件:
AT8201 话筒线路匹配变压器
(
低阻抗至
50,000 欧姆)
AT8202 可选式话筒衰减器
AT8506 四通通
48V幻象供电器 (
交流供
)
AT8801/EU 单通道48V幻象供电器 (
流供电)

Especificaciones del producto

Marca: Audio-Technica
Categoría: micrófono
Modelo: AT871UG

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