Tx Carrier State, where:
0=OFF due to front panel or remote control command
1=ON
2=RTI (receive/transmit inhibit)
3=OFF due to ext H/W Tx Carrier Off command (not a valid argument when used as
a command)
4=OFF due to BUC warm up delay (not a valid argument in a command format.)
5=RTI (receive/transmit inhibit), timeout = 1 second
6=RTI (receive/transmit inhibit), timeout = 2 seconds
7=RTI (receive/transmit inhibit), timeout = 4 seconds
8=RTI (receive/transmit inhibit), timeout = 7 seconds
Example: TXO=1 (Tx Carrier ON)
TXO=