Table 1. and p. 12 of the AD9364 reference manual both explain that when changing the Tx/Rx LO frequency more than 100MHz, a calibration is required. If I understand this correctly, this means that a calibration is required when changing to a frequency 100MHz away from the last calibrated value.
However, if hopping between LO frequencies that are all within 100MHz of the last calibrated LO frequency, a calibration shouldn't be necessary. Is this correct? What problems will occur if a calibration is not run?
Aside from the SPI register reads/writes necessary to set the Tx/Rx LO, how much time is there for the LO to settle? Or in other words, exactly how much time is there between the last SPI write to set the RF LO, and when the LO has settled on the desired frequency? (assuming there is no calibration).