系统指标 PARAMETERS OF THE SYSTEM:
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：±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Mode of receiver：二次变频超外差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/2000mA 电源适配器AC/DC adapter in line with international standards
(Input:AC100-240V, 50/60Hz
Output:safety voltage DC12V, 2000mA.
Safety certificates such as CE, UL, etc. & plugs suitable to different nations are available)
发射器指标：
发射器类型Type of the transmitters：可选择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）。
Either handheld microphone or hang-on transmitter is optional. For the latter, either lavalier or headset microphone is optional.
天线程式Mode of antenna：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。
Handheld microphone with built-in helical antenna. Hang-on transmitter uses a 1/4 wavelength whip antenna.
输出功率Output power：高功率 high power 50mW；低功率 low power 30mW
杂散抑制Spurious suppression：-60dB
供电Power supply：两节 AA 电池two AA batteries
使用时间Utility time：50mW 时大于5个小时,30mW 时大于10小时
more than 5 /10 hours at 50/30mW respectively
※产品特点FEATURES OF THE PRODUCTS
1. 采用UHF超高频段，双接收数字导频技术，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 “twin reception, digital 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50MHz频率带宽内，以250KHz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 250KHz spacings within 50MHz frequency bandwidth facilitating several sets of the product being used at the same time to avoid easily various disturbances.
3. 先进的自动对频技术，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，大型演出使用高功率发射（1000㎡以上场所），小型演出场所可使用小功率发射，以节约电池电量；
Unique high/low power switching function allows either high-power transmission in large shows (which area over 1000㎡), or low-power transmission in small shows to save power of batteries.
5. 特设接收灵敏度调节功能，可根据需要调节灵敏度，以提高抗干扰能力或增加接收距离；
Unique "receiver’s sensitivity-adjusting function" allows its sensitivity to be adjusted according to actual needs to increase either the capacity to resist disturbance or the receivable distance.
6. 使用距离可达300米；Max. working distance between the transmitter and the receiver can reach 300 meter.
7. 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.
8. 一键锁频，防止使用时误操作；Pressing the “Lock” button can lock the frequency and avoid misoperation in working.
9. 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.
10. 接收机实时跟踪发射机电池电量，防止发射机在演出中突然断电。
The receiver is able to track real-time working power of the transmitter to avoid its sudden outage of power in working.
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. 高密度6.35接口音频屏蔽线，让信号无损的传达到前级或调音台。
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 1U 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3种，给客户提供了更多灵活适用的选择。例如：领夹式或头戴式咪头能在说话的同时，解放说话者的双手。
Total 3 types of transmitters can provide more flexible and practical options to customers. Eg., Hands of the speaker can be free while he or she is speaking when either lavalier or headset microphone is used.
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.高歌真分集接收机：电路采用双天线分别连接两个调谐器，其输出信号分别送入比较器，而解调器的输出信号总是自动选择输出其中最强的信号。这样做，尽管成本提高了，但显著提高了信号输出质量，确保在任何情况下，都不会产生信号丢失、噪声干扰等问题。尤其适用于专业演出、实况表演等，以确保完美的音响效果。
Circuit of Liwmik TDR (True Diversity Receivers) adopts two antennas connecting to their respetive tuners. The output signals from the demodulators are sent to the comparator. Its output signal is switched to the better-quality-signal at all times. (as shown by the picture)
Benefit: the tech upgrades the quality of signal output significantly to ensure it's free from signal-dropout and noise-interference under any circumstances though the cost is higher. It's especially suitable to professional stage and live performances to ensure perfect sound quality.
17. 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.
