if the other end is v-pol only, you should still be able to connect even in normal mounting positions and with both chains enabled.
as it is noted in the manual chain0 should be always enabled as if you disable it then chain1 would not work correctly.
One option that you can try is to disable the TX for chain0 and leave RX enabled for chain0, but still we recommend not to disable chain0.
Is there any reason why it is better to leave chain0-tx on while not in use?
you read it wrong, the suggestion is to leave Chain0-RX on. This is because of a hardware limitation. If you don’t leave it on, Chain1 performance will decrease.
ok, a simple question - why do you need to disable any chains 
?
it works perfect with all chains enabled.
The only reason i could see is to conserve spectrum noise if you are using a single pol vertical omni, and using the Rb/SXT to connect to it.
In this case always just disable TX on chain 0 and leave RX on chain 0 ON and then check both RX/TX for chain 1.
Works great, uptime for weeks on end! and still get 150/150 rates without issue. Why even bother with rotating it?
Maximum output power does drop to 23dB in this configuration, but not a problem…
-Brad
On the other hand, if you have noise on a H pol on the same channel… then you’re forced to rotate…
but thankfully 5ghz is pretty clean most of the time! (in my areas)
BTW - Ukrainian antenna guy – AWESOME! too bad i’m far away in america, i would have to try some out!
If you have to limit power due to regulations you can decide
to spread power over 2 chains or use double power on one
chain.
First modification of Reflector SXT
SergeySavchuk, email mikrotik sales to apply for the MFM program (free) and we will put this product on our mikrotik.com page
Is the “health” reporting mixing voltage and temperature on that device?
I see that (running v5.2):
[admin@Twi] /system health> print
voltage: 16V
temperature: 24C
[admin@Twi] /system health>
It is not that warm outside and the device is connected to a 24 V adapter.
Finally someone that understands where I’m coming from…
For single chain operation in V-pol, ONLY Two options:
- turn antenna 90deg and use Chain0
- don’t turn antenna and disable Chain0-TX
( or 3. leave everything as is, it will connect to Vpol devices by default )
Recommended to use option 1.
I have run out of explanation methods
for generic SXT discussion, please make a new topic in the RouterBOARD section of this forum