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cc2541+CC2590的应用文档中 RSSI readout

mnxnm Gu
Intellectual 420 points
Other Parts Discussed in Thread: CC2540, CC2590, CC2541

Using CC2590 Front End with CC2540  Application note AN120 文档中，Figure 4.8 RSSI Readout  vs Input Power图中，RSSI readout 和通常的RSSI 是一个概念吗？ 图中最大的 RSSI Readout 是 -40dbm,  意思是用了2590后，RSSI 最大输出是-40dbm吗？  

单独使用cc2541，RSSI最大可以达到-30dbm， 为什么使用了2590，最大值会变小？ 这两个概念是一样的吗？

  • 0
    TI__Guru**** 252096 points

    The Received Signal Strength Indicator (RSSI) is a measure of the RF power input to the transceiver. The RSSI value is based on the gain setting in the RX chain and the measured signal level in the channel. In RX mode, the RSSI value can be read continuously from the RSSI status register until the demodulator detects a sync word (when sync word detection is enabled).

    At that point the RSSI readout value is frozen until the next time the chip enters RX mode. If sync word detection is disabled, the RSSI register will be continuously updated.

  • 0 回复 Susan Yang
    Intellectual 420 points

    susan,  你好，

    看了你的回复，还不是很明白， RSSI readout 是指 RSSI register读出的值吗？ 是不是 pEvent->deviceInfo.rssi读出的数值？

    文档中还说到 RSSI  offset 值， HG 和 SG 是不一样的？  如果运用这指算出 实际的 RSSI?

    请多指教，谢谢。