舒尔无线界面话筒　SHURE　MX690

Microflex无线界面话筒使用时可以自由摆放，安装时无须钻孔或使用电缆。该无线界面话筒是会议场所的完美解决方案，用户可获得所需的灵活性及高性能。与舒尔SLX无线系统相兼容，包括具有逻辑输出的SLX4L接收机，用于需要逻辑控制功能的相关应用。
■ 典雅、内敛的设计
■ 频率可调、微处理器控制的发射机
■ 双色状态指示灯环
■ 可与SLX接收机实现红外线自动频率同步功能
■ 可编程静音功能
■ 电池电量指示
■ 使用两节AA电池
■ 用于远端LED和静音控制的逻辑输入/输出

Specification:

Operating Range
30 m (100 ft.)
Note: Actual range depends on RF signal absorption, reflection, and interference

Frequency Stability
±10 ppm

Maximum Frequency Deviation
45 kHz

Oscillator Type
Phase-locked loop (PLL) controlled synthesizer

Power Requirements
3V (2 AA alkaline or rechargeable batteries)

Battery Life
≥8 hours (alkaline)

Power Consumption
130 mA, ±15 mA

Operating Temperature Range
-18–57 °C (0–135 °F)

Note: Battery may limit this range

Dimensions
43 mmH x 87 mmW x 148 mmD (1 11/16 x 3 3/8 x 5 13/16 in.)

Weight
Net: 318 g (11.2 oz)

Packaged: 516 g (18.2 oz)

Microphone Specifications

Type
Condenser (electret bias)

Frequency Response
50–17000 Hz

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Polar Pattern (at 1 kHz)
Cardioid

Sensitivity (at 1 kHz , open circuit voltage)
–33 dBV/Pa (22 mV)
1 Pascal=94 dB SPL

Dynamic Range (1 kΩ load at 1 kHz)
96 dB

Common Mode Rejection (10 Hz to 100 kHz)
45 dB minimum

Preamplifier Output Clipping Level (1% THD)
–6 dBV (0.5 V)

Polarity
Positive sound pressure on diaphragm produces positive
voltage on pin 2 relative to pin 3 of output XLR connector or tip
of 1/4” phone plug.