AR9300 half duplex or full duplex???

RouterOS Wireless Networking
1

why chain 0 and 1 on TX/RX if is half duplex
why 4 streaming???

2

All radios are half duplex. For full duplex you need ~3000$ per piece.
Also there are 2 chains, not 4.

3

HI inoX
why
TX chain0 chain1
RX chain0 chain1
???

why not only 2 check box
chain 0 and chain1

4

Because every chain can receive and transmit.