I can confirm now that it's a MS147 on the C123
I have this adapter :
http://be.farnell.com/hrs-hirose/ms-147-hrmj-1/adaptor-ms147-sma/dp/1325922
and connects to the Racal using a N male -> SMA male cable.
The racal is designed to be used with a direct connection, that's required to :
- have precise tx / rw power measurements
- ensure no signal is leaked to the outside world.
Cheers,
Sylvain