Thông số kĩ thuật Vacuum tube wireless microphone RECEIVER’S PARAMETER Frequency Ranges : UHF 640 – 690 MHz Frequency Staility : ± 0.002% (Lock with a quartz crystal superior to 15 ppm) Sensitivity (peak deviation) : 10 uV P/N Raito : >80dB S/N Raito : >90dB Dilation Ratio : 1:2 AF Output Voltage : Adjustable 0~300mV C
