[aprssig] via air 144.99

[Joe Della Barba]

I want to try flying a payload consisting of a digi receiving 144.99 and 
sending on 144.39. I have a radio and a PK-12. I would rather not have 
to haul a laptop too if I can avoid it. Can I configure the PK-12 to be 
a digi in any fashion, or do I need the laptop too with APRS+SA.
Thanks,
Joe N3HGB