Hi, I was playing around with external LO capability with the N310. I used the arg "tx_lo_source=external" and I discovered that if I only connected 1 of the 2 external Tx LO inputs, the multi_usrp make fails. For my use case, I only planned to use Tx channels 0 and 1 (daughterboard A) and so I only planned to connect the 1st external Tx LO input.
A couple of questions: 1) Is this behavior intentional? In other words, do I need to change my plans such that I supply both external Tx LO inputs even if I am only planning to transmit from one daughterboard? 2) It appears that a calibration occurs during the make (which is what fails when one input is not connected). What if I later change the external LO frequency? Do I need to ensure that this calibration occurs again, and if so, how? Rob
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