Hi Jason.
For some reason RF Sweeps like you're seeing seem to happen often for folks. It just happened to me on newly built (Rev 2) High-Band QMX after getting some decent looking sweeps initially. Next time I ran them (after replacing a BS-170 PA transistor), my RF Sweeps looked just like yours.
The solution: Do a factory reset (but record your settings somewhere, especially for AGC, first). Then you'll see proper RF Sweeps.
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73
de Roy - KI0ER
Littleton, Colorado USA