Dual channels wireless microphone system

Main features: 

*Using the UHF610~690MHz frequency band, applying PLL frequency synthesis phase-locked loop technology, the frequency is adjustable, and 5 sets can be used at the same time without interference. 

* The total control of the integrated central processing unit CPU, with the digital LCD interface display, is easy to operate and has outstanding performance. 

*Using multi-stage narrow-band high-frequency and intermediate-frequency frequency selective filtering to fully eliminate interference signals. 

* Using audio compression and expansion technology, the noise is greatly reduced and the dynamic range is increased. 

*It is equipped with the function of reducing the feedback whistle, which can effectively reduce the feedback whistle. 

* The receiver adopts multi-stage high frequency amplification, which has extremely high sensitivity. 

*The ideal space usage distance is 80 meters. 

Receiver parameters: 

Working frequency: UHF610~690MHz (adjustable) 

DC input voltage: DC12V 1000mA Ad hoc reception sensitivity selector switch 

Oscillation Mode: Dual Phase Locked Frequency Synthesis (PLL) 

Adjustment method: FM 

Maximum frequency deviation: ±50KHz 

Frequency response: 60Hz～18000Hz 

Signal-to-noise ratio: ≥89dB Low frequency attenuation: 125Hz 6dB/OCTAVE 

Output impedance: 250Ω 

Maximum withstand sound pressure: 135dB SPL 1KHz at 1% T.H.D 

Dynamic range: ≥105dB 

S/N signal-to-noise ratio: >98dB 

T.H.D distortion: <0.5% 

Transmitter parameters: 

Working frequency: UHF610~690MHz (adjustable) 

Transmitting antenna: Built-in Microstrip antenna 

Transmitter Structure: Metal Tube 

Transmitter indication: POWER switch indication, low voltage indication, frequency confirmation indication 

Transmitter Operation: Power control 

Transmitting power: 10mW 

Oscillation mode: PLL frequency synthesis (PLL) 

Frequency Stability: ≤±0.005% 

Modulation mode: FM 

Maximum frequency deviation: ±50khz 

Frequency selection: Receiver selection, infrared frequency to determine the transmitter operating frequency 

Pickup type: Heart-type moving ring 

Working power: 2 *AA  size battery 

Working current: ≤100Am