R300-E
全指向性头戴式无线话筒系统
- ClearScan：一键查找可用的最清晰通道；EZsync：接收器到发射器之间的红外通道传输，可以轻松设置，避免出错；两节AA碱性电池，可以持续供电14小时；结构坚固的金属腰包机，带背光LCD屏和电池电量表；32个预设通道，每8个通道为一个频段，供同时使用；腰包发射器带TA4连接头，能连接所有Electro-Voice领夹式和头戴式传声器，可轻松升级；可拆卸半波接收器TNC天线，支持APD4+天线分配系统；金属接收器机架，可选配机架安装前耳和前端安装天线电缆，HM-3全指向性头戴式传声器，声音清晰、连贯
BP-300是全新的金属腰包发射器，结构坚固紧凑，使用方便。BP-300使用两节AA电池，可连续使用14个小时，对于需要每天使用的场合来说是最经济的发射器之一。静音功能可保护音频通道，防止噪声干扰，同时射频信号仍保持活跃状态。TA4连接头可用于任何EV领夹式或头戴式传声器，适用于多种应用场合。R300系统的接收器可以简易放置于桌面上，也可以装在19"设备机柜中。对于专业安装，R300有机柜安装套件和前安装天线电缆可供选择。对于一个机架中有4个接收器的情况，单台APD4+天线分配器可提供天线分配和接收器供电。
Specifications
| Connector Type | 1/4 inch unbalanced, 3-pin XLR balanced |
| Family | R300 |
| Power Supply | 12 VDC, 500mA max |
产品规格 |
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| Polar Pattern | Omnidirectional |
| Battery Life | 14 hours with (2) AA alkaline typical |
| RF Output | 8 mW typical |
| Element | HM-3 Omni-directional headworn |
| Operating Temperature Range | 5º - 45º C (41º - 113º F) |
| Case Material | metal |
| RF Frequency Range | 16 |
| Signal-to-Noise Ratio (A-weighted) | greater than 100 |
| Power Requirement | 12-16 VDC, 500 mA max |
| Controls | on/off, Set, Up, Down, Sync |
| Antennas | Flexible TNC 1/2 Wave |
| Number of Channels | 32 per band, 8 Simultaneous |
| Diversity | True Antenna |
| Squelch | Tone code plus Amplitude |
| Receiver Type | Synthesized PLL |
| RF Sensitivity (12 dB SINAD) | less than 1.0 |
| Audio Frequency Response | 80 Hz - 18kHz +/-2dB |
| Balanced Line Level Output (RMS Adjustable) | 10 - 100 |
| Distortion (@ 1 kHz, 40 kHz deviation) | Less than 1.0, 0.4 typical |
| Dynamic Range | greater than 95 |
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