Team, customer has the following questions.
HMC7044 is being used with a PLL2 LBW of 600kHz-700kHz in the eval board. A wider BW was not tested before, but 1MHz is achievable - that is possible.
My concern is, HMC7044 includes a multiband VCO with two VCO cores. Normally VCO bands are wide enough to cover the mentioned range but it is difficult to guarantee it over temperature.
Another point is; with such a wide LBW, all PLL noise will contribute to overall performance. Normally in a jitter attenuator configuration, LBW is designed to be very narrow to have high performance by eliminating PLL and reference noise and by using the advantage of very low noise, low BW VCO (namely VCXO). The overall noise performance probably will be still OK, but needs a careful design with this in mind.