华商宝

DS-700B

Main function

●Using VHF 200-280 MHz band to avert interferencing frequency

●Using multilevel high frequency and mid frequency narrowband filter, so as to dispel any possible interferencing signals

●The wireless microphone use hidden antenna look good and are useful

●There is a volt indicating circuit in the the microphone it can tell you if it is necessary to change the battery.

●A specially designed circuit switch is on the phone. It is for clearing up waves of miscellaneous singnals

●All use quartz crystal oscillating circuits so the frequency is very steady

●With audio compressing – expanding technology, the machine can lower noises and increase the dynamic range. It can also lower reecho

●The receiver use multilevel high frequency enlarge so it has high sensitivity

●It has channel separate outputting and mix outputting and it can be connected with sound – adjusting stage and the karaoke enlarger

●Special tone key locked identity functions to avoid interference sighal from outside open the mute system

●There are mulriple noise detect circuit functions to avoid interference signal from outside open the mute system

●There are mulriple noise detect circuit, multi circuits so it has strong anti – jamming speciality

●Choose excellent chipset and high quality component so that its timbre will be very good

●Longest distance in open : 150mldealest distance in open : 100m

●Frequency response tailored for vocals, with brightened midrange and bass rolloff

●Uniform cardioid pick up patten isolates the main sound source and minimizes backgound noise

●Effective, built – in spherical wind and pop filter

●It is suitable for small and large stages \ ballrooms auditoria classrooms and families

主要特性

●使用VHF 200-280MHZ频段，避免干挠频率

●采用多窄带高频及中频选频滤波，充分消除干挠信号

●采用低电压设计，电池电压低到3V仍可以工作

●采用特别ALC电路不用担心音量过大而失真

●采用低功率耗元器件，电池使用寿命特长

●手持麦克风具有电量指示电路，提示更换电池

●特设手持麦克风半闭音讯冲击波消除电路

●全部采用石英振荡电路，具有极高的频率稳定性

●采用音频压缩一扩展技术，噪音大大减少，动态范围加大

●设有加输啸叫压低减弱功能，能有效减少回输啸叫

●独特的噪音静噪功能，拒绝外部干挠打开本机敝音系统

●选定极佳晶片及优质零部件，使本机音质极为出色

●具有独立的输出和混合输出，可接调音台和Karaoke放大器

●空阔最大使用距离150米， 空阔理想使用距离100米

●适用于大少舞台，歌舞厅，会议厅，教堂讲课，家庭娱乐

Specification

1.       Comprehensive performance

Carrier frequency: VHF200~280MHz

Frequency stabilization: less than ± 30 ppm

Dynamic range: more than 90dB

Total harmonic distortion: less than 0.5%

Frequency response: 40hz – 15 khz ± 3dB

Audio output level separate type: 0--±400mv mix tvne 0--200mV

2.       Fixed receiver

Power supply: AC110-220v /45-60hz

Consume power: 4watt

Signal / noie power: ＞60db

Signal / nose ratio: ＞80db

Image & spurious rejection: ＞60db

Receiveing sensitvity: ＜10dbuv (sonad=30db)

De-emphasls: 50us

3.       Handing microphone 

Transmitter power: 30mw

Modulaton type: FM, F3F

Max deviation: ±25KHz

Spurious emission: ＞40dB (with carrier)

Battery voltage: 9v battery

Continuum using: 6 hours (compare with GP 1604s 9v battery)

Noise control: perfectness circuit for eliminating noises

性能指标

1、 综合性能

载波频率： VHF200~280MHZ

频率稳定性：<±30ppm

动态范围：>90dB

谐波失真：<0.5%

频率响应：40HZ~15KZ ± 3dB

音频输出：独立式：0~± 400mV 混合式：0~± 200mV

2、 固定式接收机

使用电源电压：AC110 / 220V / 45-60Hz

消耗功率：4water

信噪比：>98dB

假象干挠比：>80dB

领道干挠比：>80dB

接收灵敏度：>5dBu（SINAD=20dB）

3、  手持麦克风

发射功率：30mW

调制方式：FM, F3F

最大调制度：±25KHz

高次谐波：低于主波基准40dB以上

使用电源电压：9V层叠式电池

连续使用时间：6小时（对于GP 1604S 9V 型电池）

Body – pack transmitter

Trabsnutter power: 30mV

Modulation type: FM,F3F

Max deviation: ±25KHz

Spurious emission: ＞40 db (with carrier)

Battery voltage: 9V battery

Continuum using: 6 hours (GP 1604s 9v battery)

Noise control: perfectness circuit for elininating noises

腰挂式麦克风性能

使用音头：背极电容式

发射功率：30mV

调制方式：FM, F3F

最大调制度：±25KHz

高次谐波：低于主波基准40dB以上

使用电源电压：9V层叠式电池

连续使用时间：6小时（对于GP 1604S 9V型电池）