美国国家半导体公司的2.4G无线方案
美国国家半导体公司的2.4G无线方案
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 |
CVM: (1 st Generation)
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The protocol and software interface is contained in the SC14428
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Module for fixed part and portable part
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Size is 45.6X26.6X 6mm
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| 匿名 | 2018-06-16 21:17:26 |
| 呵呵 | |
