本2.4G数字无绳电话方案采用美国国家半导体公司的2.4G无线方案。本系统运行在2.4GHz(2400-2483.5GHz)开放频段上，采用时分双工（TDD），调制方式为BT=0.5的GFSK，调制指数为0.28～0.35。采用跳频方案以确保链路稳定。本方案包含1台母机和1台子机，但同时可带4台子机。4台子机可同时进行通讯。
基本 RF 指标
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 |
|
