Elecraft KXPA100 Programmers Reference - Manual (Page 8)

8
^BN (Band Number, GET and SET)
GET format: ^BN;
SET/RESPONSE format: ^BNbb; where bb is 00 to 10. A leading zero may not be omitted.
^BNbb; may be used to select the Band Number when receiving.
The amplifier changes the Band Number from the transmit frequency counter.
If you know the frequency, it is better to band switch with the ^MT command, because ^MT also sets
ATU settings memorized for that frequency.
bb Band
00 160 meters
01 80 meters
02 60 meters
03 40 meters
04 30 meters
05 20 meters
06 17 meters
07 15 meters
08 12 meters
09 10 meters
10 6 meters