• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 80 subscribers
  • Views 872 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

What is RSSI Value?

Eswaran Rathinam12
Intellectual 350 points
Other Parts Discussed in Thread: CC1200

Hello ,

           im confused about the term RSSI.I Suppose it is the strength of the received power at the receiver end.I did a basic experiment.i have a cc1200 module connected to trxeb board.i connected the two boards antenna out through a SMA Cables.The datasheet quotes that the transmitter sends out signal at 14Dbm.But when i run the PER Test code at boards,i got a RSSI of  -9Dbm even when the boards are connected through SMA cables.Im sure that the cables wont be having a loss of ''23Db''.So i connected the antenna and run the same code,i got a RSSI of -6Db,when the boards are pretty close at same orientation.(4cm away).So what is actually RSSI?And why im getting a loss of more than 23dbm when i connect through cables.Please reply..Thank you..

  • 0
    Guru 14640 points

    You may want to repost this in the "wireless connectivity" Support Forum, if it is not already answered there...

  • 0
    Guru 227245 points
    RSSI - Received Signal Strength Indicator. A value that gives some (not necessarily linear) relation between the signal strength received and either a normalized signal strength or the receiver saturation level. It may or may not be normalized to dBm. (I don't know what the CC1200 provides)
    I don't think it is a good idea to directly couple transmitter and receiver. You might fry the electronics. +14dBm will be well above the saturation voltage of the receiver (which usually is designed to amplify input voltages in the range of down to -100dBm) and the input voltage (and supplied current, as you are directly driven by the output driver of the transmitter) may well cut though any protection.

    Try to glue (literally) your eardrum to a 500W subwoofer and see whether you'll hear anything ever again. And then compare this to listening to the music in a distance of 1m. Probably still damaging, but you might recover.

**Attention** This is a public forum