Selectable band GNSS multiband

Hi, i have some troubles with my paylaod interfering with my gps ( actually here 2 on L1 band 1 575,42 MHz). i’m using arduplane v4.0.5.
i would try to install a multiband L1/L2 and just use the L2 band ( 1227,60 MHz) to make some tests.

i probably us this gps reference

multiband gnss

ublox chip.

is it possible to select the band in mission planner?

is anyone had issue to select only L2 band in ublox center for a gps?

what will be the mission planner reaction if i use a L2 only antenna with this gps to catch only L2 data?