HMC891A Controlling the BW

Hi. The above device has a BW of 1.95 GHz to 3.4 GHz, Can someone explain how the Vbwctl pin controls this device? Would setting the pin to the max 14V give me a BW of 1.95GHz to 3.4GHz? It's not clear to me from the datasheet. Also, I've just started looking at these types of ICs, so some specs may not be very obvious to me. 

Thanks. 

Alin