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2.4G數字無繩電話

管理員:   發布時間:2014-10-09

 本2.4G數字無繩電話方案采用美國國家半導體公司的2.4G無線方案。本系統運行在2.4GHz(2400-2483.5GHz)開放頻段上,采用時分雙工(TDD),調制方式為BT=0.5的GFSK,調制指數為0.28~0.35。采用跳頻方案以確保鏈路穩定。本方案包含1臺母機和1臺子機,但同時可帶4臺子機。4臺子機可同時進行通訊。

基本 RF 指標

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