"Q" width for Series III "Key Filter" Gate

Pertaining to the "Key Filter" value when using the gates on the Series III, is there a default "Q" width for the value of the selected gate? For example, if I set the gate to open on 800hz, is the gate looking specifically for 800hz, or is it looking for a broader frequency range i.e. from 400hz to 1,600hz (using 800hz a center frequency)?

Is there a way to control the low and high frequency range of what the gate will open on?