First, the system description

The system is a wireless conference system working in the UHF band. It is fully digitally controlled and has multiple speaking modes. It can be connected with the video host to realize the video tracking function. The power supply of the attendant unit can be either a normal battery or a rechargeable lithium battery, which is convenient and environmentally friendly. The system is easy to operate, free of engineering installation, economical and practical, and is the first choice for conference engineering.

1.1 Features

l FM frequency modulation is used to realize sound signal transmission, high fidelity, high signal to noise ratio and no sound delay. Use the unique new anti-howling single-point high-sensitivity condenser microphone to make the conference sound almost perfect.

l The audio channel and the control channel are transmitted wirelessly, no need to lay cables, and the signal coverage can be moved freely in the park, which makes the venue layout convenient and flexible.

l Data communication algorithms independently developed for conference applications, so that the system response speed is not affected by the number of participants in the signal range. Users can flexibly increase or decrease the attendance unit. The factory default system attendance unit capacity is ≦255 (including 1 chairman).

l It has the rotation of 1-2-3-4, the limitation of 1-2-3-4, and the chairman's proprietary multi-session speech mode. The main control unit can externally connect the video host to realize the video tracking function of the conference attendance unit.

l Ultra-low power consumption, the continuous speaking time of more than 8 hours and the standby time of more than 20 hours; the ordinary battery of No. 5 or the original lithium battery of the manufacturer can be used. The matching charging box has a smart charging management circuit to effectively protect the battery, extend battery life and ensure safety.

l Large screen LCD display. The hierarchical menu design makes the operation simple and convenient. And there are many functions such as power display and undervoltage warning, frequency channel and signal indication.

l The main control worker adopts the all-metal structure design, and the Zhuang is a generous party; the attending unit adopts engineering plastic material with novel appearance design, built-in antenna, and beautiful appearance.

l The main control machine has USB recording/broadcasting module, which can realize USB recording/broadcasting function. It can also connect to third-party Bluetooth devices via Bluetooth and simultaneously play music of third-party Bluetooth devices.

1.2 main control machine technical indicators:

u Power input: DC12V-15V, ≧1A

u power consumption: <7W

u working temperature -10 ° C -40 ° C

u main control unit size (W × H × D): 485mm × 100mm (2U, including chassis mat) × 355mm

u main control machine weight: 7.2kg

l audio channel

u communication method: UHF wireless mode (one-way)

u channel number: 5 channels (1 chairman unit path, 4 for unit path)

u frequency range: (the frequency range is available in the range of 500MHz---950MHz)

u demodulation method: FM

u Receive sensitivity: -100dBm

l control channel

u communication method: UHF wireless mode (two-way)

u channel number: 16

u frequency range: 422.4MHz - 438.4MHz

u modulation method: FSK

u Receive sensitivity: -100dBm

u Radiation power: ≦+6dBm

u frequency deviation: <0.002

u data rate: 100KBPS