I recently purchased an ALFA AWUS036H wireless USB adapter to use with BT4. I checked the wiki and it said that you have to alter the sources in the kismet.conf file to say "source=rt8180,wlan0,ALFA". I did this but then I get this error message:
Launching kismet_server: //usr/bin/kismet_server
Suid priv-dropping disabled. This may not be secure.
No specific sources given to be enabled, all will be enabled.
Non-RFMon VAPs will be destroyed on multi-vap interfaces (ie, madwifi-ng)
Enabling channel hopping.
Enabling channel splitting.
NOTICE: Disabling channel hopping, no enabled sources are able to change channel.
Source 0 (ALFA): Enabling monitor mode for rt8180 source interface wlan0 channel 6...
Source 0 (ALFA): Opening rt8180 source interface wlan0...
FATAL: pcap reported netlink type 1 (EN10MB) for wlan0. This probably means you're not in RFMON mode or your drivers are reporting a bad value. Make sure you have the correct drivers and that entering monitor mode succeeded.