Erik - thank you for the update. It has improved the spurs as I no longer see the two spurs at 533.725 MHz and 533.775 MHz. There is a new spur at 533.6416 MHz (using precise sweep accuracy, 200 Hz RBW, and 50 kHz span) that is at -72.8 dBm. On quick review I have not seen others. I appreciate your work to make this an even better product!
~Otto