系统指标 PARAMETERS OF THE SYSTEM:
接收机与发射器的配比数量：1台接收机配备4个发射器（俗称“一拖四”）
Matching quantity between receiver and transmitters: each receiver can match 4 transmitters (1 match 4)
频率范围Range of frequency：640MHz-690MHz/740MHz-790MHz
调制方式Method of modulation：宽带 Broadband FM
可调范围Adjustable range：50MHz
信道数目Quantity of channels：200
信道间隔Channel spacing：250KHz
频率稳定度Frequency stability：within±0.005%以内
动态范围Dynamic range：100dB
最大频偏Max. drift of frequency：±45KHz
音频响应Audio response：80Hz-18KHz(±3dB)
综合信噪比Integrated signal-to-noise ratio：>105dB
综合失真Integrated distortion：≤0.5%
工作温度Working temperature：-10°C - +40°
接收机指标PARAMETERS OF THE RECEIVER：
接收机方式：二次变频超外差
Mode of receiver：Double frequency conversion superheterodyne
中频频率IF frequency：第一中频1st IF：110MHz，第二中频2nd IF 10.7MHz
无线接口Wireless interface：BNC/50Ω
灵敏度Sensitivity：12 dBμV (80dBS/N)
灵敏度调节范围Adjustable range of sensitivity：12-32 dBμV
杂散抑制Spurious suppression：≥75dB
最大输出电平Max. output level：+10 dBV
供电Power supply: 12V/1000mA 电源适配器AC/DC Adapter in line with international standards:
(Input:AC100-240V,50/60Hz
Output:safety voltage DC12V, 1000mA.
Safety certificates such as CE, UL, etc. & plugs suitable to different nations are available)
发射器指标PARAMETERS OF THE TRANSMITTER：
发射器类型：可选择会议式麦克风（带底座的麦克风），手持式麦克风或佩挂式发射器（后者可选配领夹式或头戴式咪头）。
Type of the transmitters：Conference microphone (desktop microphone), handheld microphone or hang-on transmitter are optional.
For the latter, either lavalier or headset microphone is optional.
天线程式：会议式麦克风和手持麦克风内置螺旋天线,佩挂发射器采用 1/4 波长鞭状天线。
Mode of antenna：
Desktop microphone and handheld microphone with a built-in helical antenna each.
Hang-on transmitter uses a 1/4 wavelength whip antenna.
输出功率Output power: 高功率 high power 30mW；低功率 low power 3mW
杂散抑制Spurious suppression：-60dB
供电Power supply：两节 AA 电池two AA batteries
使用时间：
会议式麦克风（30mW）：大于10个小时；
手持麦克风/佩挂发射器：30mW 时大于10个小时,3mW 时大于15小时 ；
Utility time:
Desktop microphone(30mW): more than 10 hours
Handheld microphone/Hang-on transmitter：more than 10 /15 hours at 30/3mW respectively
※产品特点FEATURES OF THE PRODUCTS
1. 采用UHF超高频段，模拟导频技术，比传统的VHF频段干扰更少，传输更可靠；
UHF (Ultra High Frequency) range and the technique of “analog pilot frequency” are adopted with less disturbances and more reliable transmission of signals than traditional VHF (Very High Frequency) range.
2. DPLL数字锁相环多信道频率合成技术，在60MHz频率带宽内，以300KHz信道间隔，提供多达200个信道选择,方便多套机器同时使用，轻松避开各类干扰；
The DPLL (Digital Phase Lock Loop) multi-channel frequency composing technique can provide as much as 200 channels by 300KHz spacings within 60MHz frequency bandwidth facilitating several sets of the product being used at the same time to avoid easily various disturbances.
3. 先进的红外自动对频技术，即使将发射器与接收机的频率调乱了，您只需轻轻一按，发射机就会自动追锁接收机频率并调整一致，使用方便；
Advanced automatic infrared frequency-synchronizing technique is adopted. Even frequencies of the transmitter and the receiver are adjusted to be untuned, just one pressing on the button will allow the transmitter to track frequency of the receiver and adjust their frequencies to be the same automatically. It is easy to use.
4. 特设高低功率切换功能，不仅在集会等活动场所（高功率发射），使用流畅，而且在如学校教室、 KTV 包间使用时（低功率发射），节约电池电量；
Unique high/low power switching function allows either fluent using of the product in places like mass rallies (high-power transmission) , or saving power of batteries when it is used in school classes or KTV (Karaoke Television) rooms (low-power transmission).
5. 使用距离可达200米；Max. working distance between the transmitter and the receiver can reach 200 meter.
6. 自动搜索无干扰频点功能，方便快捷；
Function of automatic searching for non-interference frequency points . Easy and quick.
7. 4通道独立显示操作界面，清晰且方便；
The operating panel with 4 independent channels can display clearly and conveniently.
8. 4通道独立平衡输出接口和4通道混合平衡输出接口；
With 4 connectors for independent balanced output channels and 4 connectors for mixed balanced output channels.
9. 菜单内设锁频功能，可避免误操作；
Function of “locking the frequency” is built in the menu to avoid misoperation in working.
10. 电子音量控制，可调范围0-39每步进2dBm；
Electronic volume control: 0-39 stages adjustable with 2dBm adjusted by each stage.
11. 全视角LCD显示屏，让您在任意角度清晰可见。
The total-view LCD display screens show clearly from any angle working status of the transmitter and the receiver.
12. 优质高密度6.35接口音频屏蔽线，可让信号无损传达到前级或调音台，传音效果更保真。
High quality , high density shielded cables with 6.35 interface for audio frequency allow signals to be transmitted to the preamplifier or mixer without loss. Thus higher fidelity of sound-transmission can be ensured.
13. 标准1U钢质机箱设计，采用防刮花水纹漆，美观坚固耐用。
Steel case of the receiver, adopting standard IU case design and spraying painted wearproof water-wave finishing, looks very nice and is strong, durable to use.
14. 发射器类型多达4种，给客户提供了更多灵活适用的选择。
Total 4 types of transmitters can provide more flexible and practical options to customers.
15. 产品音频响应频率范围宽广：涵盖了人耳能听到的声波频率范围，无论是浑厚低音、悦耳中音，还是嘹亮高音，都能得到完美传递并再现，保证了高保真的音响效果。
Wide audio response frequency range of the product covers the frequency range of sound waves that can be heard by human ears. Whether it is deep bass, melodious mediant , or loud and clear treble, all voice can be perfectly transmitted and reproduced to ensure the Hi-Fi sound effect.
16. 多年经验、专业设计、优质材料及元器件、精心制造过程，共同造就了这款高品质、高颜值的精品。
Years of experience, professional design, quality materials and components, plus meticulous manufacturing process, create together the excellent product w/ high quality and pretty appearance.
