The system parameters

Working frequency: 690-740, 740-800, 800-850MHZ

FM: broadband modulation mode

The number of channels: 200

The channel spacing: 250KHZ

Frequency stability: + 0.005%

Dynamic range: 100dB

The maximum offset: + 45KHZ

Audio frequency response: 80Hz-18LHz (+ 3dB)

Comprehensive signal-to-noise ratio: 105dB

General distortion: less than or equal to 0.5%

Working distance: about 100m (in the case of no interference)

The receiver indicator

Receiver: two superheterodyne

Frequency: 110MHz0.7MHz

Wireless access: BNC/50.

Sensitivity: 12dBuV (80dB S/N)

Sensitivity adjustment range: 12-32dBuV

Spurious suppression: greater than or equal to 75dB

The maximum output level: 10dBV

The transmitter indicator

Antenna: mobile phone microphone built-in spiral antenna features a transmitter based on 1/4 wave whip antenna

Output power: high power 30mW; low power 3mW

Spurious suppression: -60dB

Power supply: 2 section 5 1.5V alkaline batteries

Battery life: normal power launch about 10 hours, low power launch about 15 hours