VCOREG in LMS6002D

Hi guys, Could anyone tell me, the software guy, what may be the purpose of VCOREG block in LMS6002D (Figure 3.4 at the Programming Guide)? In our current code it's always powered down and not used, and I just wonder whether it could be used for frequency hopping and what are other potential uses. If I understand correctly, it's a kind of fine tuning for the PLL output frequency. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru