In order to determine the maximum transmission power or the maximum value for the TX_Power register, we have determined the RSSI in dBm at a very short distance. (Formula in the user manual). Since we are limited to 41.3dBm / Mhz transmission power spectral density, RSSI / MHz has to be determined, so that, according to my considerations, this value is 27dBm lower due to the 500MHz bandwidth. At a distance of ~10cm we are at RSSI ~ 43dBM and respectivly RSSI / MHZ ~ 70dBM. But we have already chosen the transmission power to be very high: TX_POWER register = 0xFDFDFDFD (tx power level ~ -3dB)
Configuration: ch = 9, preamble = 64, PAC = 8, TX&RX preamble code = 9, standard 8 symbol SFD, 6.8Mbit / s data rate, no STS.
Our questions: Are our assumptions correct? Has the 500MHz bandwidth already been taken into account in the calculations?
Because we don’t come close to -41.3dBm/MHz.
Thanks in advance!