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.
On 28 Jan 2013 20:17, "gang li" <
address@hidden> 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
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