Hi, Calibration uses full duplex and should only be done without anything plugged into the 'tx/rx' or 'rx2' ports. There is no direct connection, just measurement of the residual rf escaping.
Mike M0MIK On 28 Jan 2013 20:17, "gang li" <[email protected]> wrote: > Hi, guys, > > I am reading the codes for uhd_cal_rx_iq_balance.cpp. > When doing calibration by setting the RX and TX antenna as "CAL", is > the signal from TX directly switched to RX? > And I noticed that in the function set_optimum_defaults(), the tx_gain > is 0 but the rx_gain is 25! Is that too high? I heard that when > directly connecting TX and RX, we should use attenuators. So why does > it set 25 rx_gain? Thanks. > > Best, > Gang > > _______________________________________________ > USRP-users mailing list > [email protected] > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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