Hi I own a b210 and I have a gpsdo that's installed but i do not have the antenna yet. Can I use it as a 10mhz reference and pps until I obtain the antenna?
Yes, you can.
But you don't win as much: the more modern B210 GPSDOs aren't worlds better than the standard integrated TCXO of the B210 is, anyway. So, I'd recommend using clock source = internal until you get an active antenna for your GPSDO.
Generally, if you know you can work with the lower frequency accuracy or timing, why even bother with a GPSDO? All real-world receivers need to do frequency recovery, anyway, even if they had GPSDOs – unless nothing in the environment moves.