the Cisco outdoor 1300, with 2 external antenna connectors, offers (what Cisco) call "diversity". Can they tx and rx on both antenna at the same time ? The docs do mention it, but if this is a restriction, they dont spell it out. TIA
Yes. The antenna is selected on a per-packet basis automatically for rx, or diversity can be turned off by selecting one antenna. You cannot assign stations to a given antenna by software configuration.
running diversity for tx is kindof magic. When the AP sends out the beacons, it is best to do this through both antennas as all associated stations should receive them. Those better through left antenna like those better through right antenna. But beacon diversity handling differs by various vendors implementations.
It is possible to send a packet to a station through the antenna with the best signal from station's last packet to ap, but this may not still be the better path.
I haven't found hard serious facts how tx diversity is implemented.