Dear all, We are trying to transmit a carrier using a USRP2 board (done using the USRP2 constant source example in the UHD branch) and then measure the received power by using the FFT via another USRP2 board directly connected to it. However, the fft shows a lower power than specified in the data sheet (11dBm instead of 17dBm). We have a few questions regarding this:
1.) What are the main factors in hardware and software which affect the Tx and Rx gain? 2.) We read in the datasheet that the RFX2400 has a transmit power of 17dBm. However, we observe from the schematic of the RFX2400 that there are two amplifiers (MGA82563 and RF3315) with output power of 17dBm and 23dBm respectively. How is the 17dBm figure in the datasheet derived? 3.) In software, what is the point of setting the set_gain parameter in a USRP2 sink? How does this change the transmit power? Does this change occur in hardware or in software? 4.) At the receiver side, is there a variable gain amplifier? How does the gain parameter in the USRP2 source affect the received signal and is this in hardware or in software? What controls the amplifier? 5.) How do we make sure that we always transmit at the highest possible power? Thankyou in advance for any help you can provide. Best regards, Marc. -- View this message in context: http://old.nabble.com/USRP2-Transmit-Power-tp29356470p29356470.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
