2.4G數(shù)字無繩電話

管理員：發(fā)布時(shí)間：2014-10-09

本2.4G數(shù)字無繩電話方案采用美國國家半導(dǎo)體公司的2.4G無線方案。本系統(tǒng)運(yùn)行在2.4GHz(2400-2483.5GHz)開放頻段上，采用時(shí)分雙工（TDD），調(diào)制方式為BT=0.5的GFSK，調(diào)制指數(shù)為0.28～0.35。采用跳頻方案以確保鏈路穩(wěn)定。本方案包含1臺(tái)母機(jī)和1臺(tái)子機(jī)，但同時(shí)可帶4臺(tái)子機(jī)。4臺(tái)子機(jī)可同時(shí)進(jìn)行通訊。

基本 RF 指標(biāo)

Item	Specification	Comment
Receive Sensitivity	Minimum: -89dBm Typically: -92dBm to -94dBm Maximum: -96dBm	@ BER = 0.001
Receive IIP3	-21dBm to -19dBm
Transmit Power (NTP)	Minimum: 20dBm Typically: 22dBm to 24dBm Maximum: 25dBm	Approx. 200mW
Signaling Bit-rate	576Kbit/sec
Modulation	GFSK	Bandwidth 20dB < 0 . 864MHz
Channels	95	Channel spacing: 0.864 MHz
RX/TX slots	4/4
Fast Frequency Hopping	Up to 800 hops/sec
Antenna Diversity	Control signals are available from the module	Antenna switch has to be added externally
Dual Slot Diversity		Antenna switch has to be added externally
Standard Compliance	FCC part 15.247/249

CVM: (1 st Generation)

The protocol and software interface is contained in the SC14428
Module for fixed part and portable part
Size is 45.6X26.6X 6mm

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2.4G數(shù)字無繩電話