I compile here some of the information I have gathered and set out some questions I do not know
The FAQ explains that hack rf one have three amplifiers for reception ( RF, IF and BB) and two for transmission (RF and IF) At RX: RF gain may be 0 or 14dB IF (LNA) gain may be from 0 to 40 db in 8dB steps BB (VGA) gain may be from 0 to 62dB in 2 db steps They suggest using RF=0, IF=16, BB=16 as start point and change IF and BB almost same amount up/down trying to achieve a gain so good you have a good SNR but so low you don't have distortion You must not use RF gain unless you are receiving a very week signal and even so you must be sure there is no other signal out of your band of interest with high power because if it is the case you can damage your RF amplifier Max RX power = -5dBm (In theory with the RF amplifier gain set to 0 it can accept up to +10dBm but it is not recommended) At TX RF gain may be 0 or 14dB IF gain may be from 0 to 47 dB in 1dB steps There is no BB amplifier You cant transmit without a correctly adapted antenna (for instance without antenna) because impedance disadaptation may produce reflection (without antenna 100% reflection) wich will create an overshoot and can destroy the RF amplifier. Max TX power depends on TX frequency 10 MHz to 2150 MHz: 5 dBm to 15 dBm, generally increasing as frequency decreases 2150 MHz to 2750 MHz: 13 dBm to 15 dBm 2750 MHz to 4000 MHz: 0 dBm to 5 dBm, increasing as frequency decreases 4000 MHz to 6000 MHz: -10 dBm to 0 dBm, generally increasing as frequency decrease Taking in account all the precedent, I have two questions (indeed they are very related) What it the max amplification you can use for TX? When using a osmocon sink in GNU Radio, how can we calc the power we are using for transmision? regards _______________________________________________ HackRF-dev mailing list [email protected] https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
