The default PLL configuration for the XEM3005 and many of the examples in the Front Panel manual have large common factors in the dividers. For example, the default values of P and Q to generate 400 MHz from 48 MHz are P=400 and Q=48. Wouldn’t it be better if these were P=25 and Q=3? I thought that a synthesizer would have better phase noise if the dividers had the common factors removed. Similar reductions are possible for the other examples in the manual.
I doubt that there would be any noticable effect, but it seems like better practice.