Audio-Technica AT875R Manual de Usario

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LINE + GRADIENT CONDENSER MICROPHONE
- Designed for video production and broadcast (ENG/EFP)
audio acquisition
- Extremely short length (175mm) ideal for use with compact
digital cameras
- Provides the narrow acceptance angle desirable for long-
distance sound pickup
- Excellent sound rejection from the sides and rear of mic
- Tailored response minimizes camera and handling noise
- Operates on phantom power only
The AT875R requires 11V to 52V DC phantom power for
operation.
Output from the microphone’s 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.
To avoid phase cancellation and poor sound, all mic cables
must be wired consistently: Pin 1-to-Pin 1, etc.
The high sensitivity of the AT875R assures useful output and
an excellent match to most input sources. In some cases,
however, an attenuator such as the Audio-Technica AT8202
may be required between the microphone and preamplier to
avoid overloading sensitive input stages.
The microphone is RoHS compliant–free from all substances
specied in the EU directive on hazardous substances.
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-L0120-07-E
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
same as 1 kHz
Machida Tokyo Japan
SPECIFICATIONS
ELEMENT Fixed-charge back plate
permanently polarized condenser
POLAR PATTERN Line + gradient
FREQUENCY RESPONSE 90-20,000 Hz
OPEN CIRCUIT SENSITIVITY -30 dB (31.6 mV) re 1V at 1 Pa
IMPEDANCE 100 ohms
MAXIMUM INPUT SOUND LEVEL 127 dB SPL, 1 kHz at 1% T.H.D.
DYNAMIC RANGE (typical) 107 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO 74 dB, 1 kHz at 1 Pa
PHANTOM POWER REQUIRMENTS 11 - 52V DC, 2 mA typical
WEIGHT (less cable and accessories) 80 g
DIMENSIONS 175.0 mm long,
21.0 mm diameter
OUTPUT CONNECTOR Integral 3-pin XLRM-type
ACCESSORIES FURNISHED AT8405a stand clamp for ⅝"-27
threaded stands;
⅝"-27 to ⅜"-16 threaded adapter;
windscreen;
protective carrying case
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-L0120-07-C
超指向性电容话筒
- 为 影视 制作 和广 播采 访(E NG /E FP )音 频收 音而 设
- (175mm)适合于小型数字摄像机使
- 提供窄角度的超指向性能,给与远距离的收音效果
- 由话筒两旁到后方均有极佳抗噪音能力
- 特有的频率响应,可减低摄像机和手持噪声
- 使用幻象供电工作
AT875R 11V 52V话筒需使用 至 幻象供电工作。
话筒的 卡农输出端为低阻抗平衡输出,话筒音频信XLRM
号最终以卡农公头的23号针脚输出,而1号针脚则为
线 ()接 。输 出位 将以 正位 电平 设2针 脚
为 避 免出 现 相 位相 互 抵 消而 失 真 的 情况 , 所 有话 筒 连 接
时,接线必需以1-12-23-3型式把针脚连接。
AT875R提供高灵敏度的收音效能,可确保能接收到最大
的音源。而在某些情况下,为避免发生超负载输入而出现
破声情况,需要在话筒和前置放大器之间加入 等的AT8202
电平衰减器。
话筒符合RoHS规格,在构造上不含有盟禁用的危
物质。
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
1 kHz 曲线相同
Machida Tokyo Japan
技术指标
收音头 固定充电背板,
静电型电容式
指向特性 超指向性
频率响应 90-20,000 Hz
开通灵敏度 -30 dB (31.6 mV) 1V 1 Pa
输出阻抗 100 欧姆
最大承受声压 127 dB 声压, 1 kHz 1% T.H.D.
动态范围 (典型) 107 dB, 1 kHz
于最高声压
讯噪比 74 dB, 1 kHz 1 Pa
幻像供电 直流 11 - 52V, 耗电 2mA 典型
重量 80 g
外形尺寸 175.0 mm , 21.0 mm 直径
输出连接器 内置 XLRM-3针卡农公头
附属品 AT8405a ⅝"-27接头转轴式支架;
海棉防风罩;
⅝"-27"-16转接头;
保护袋

Especificaciones del producto

Marca: Audio-Technica
Categoría: micrófono
Modelo: AT875R

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