Icom IC7300 SDR REVEIW

Many thanks for your thorough and thoughtful comments on the IC-7300. As you are doubtless aware, I have tested a fair number of direct-sampling SDR's over the past few years as well as legacy (conventional) transceivers. I have learned from this test activity that a direct-sampling SDR receiver is a totally different "animal" than a legacy receiver, and requires a completely different approach to performance testing. The old "touchstone" metrics of DR3 (3rd-order IMD dynamic range), BDR (blocking dynamic range) and IP3 (3rd-order intercept point) are completely meaningless in the context of an ADC.

I have covered these matters in a paper I gave at our club, at APDXC 2014 and at several other venues. The paper is entitled "HF Receiver Testing: Issues and Advances." Here is the link: