I try to transmit simultaneuos with 2 R52NM and performance is low..

1.- Only transmit wlan1<--->wlan1 bandwidth test UDP:220Mbps
2.- Only transmit wlan2<--->wlan2 bandwidth test UDP:220Mbps

3.- Transmit simultaneous wlan1 and wlan2 ant bandwidth test is slow.. 120 Mbps for radio.


I try to down tx power to 5 and I have good separation with antennas and pigtails.. I don't know what is the problem...

I have make more test and I can say that 2 radios transmit simultaneous can be work in 5Ghz-onlyN. There is no problem with interference. I test with separate boards and it's work but when I put two radios in same board it fail...

Have you measured the power draw when transmitting with both radios?

The RB52Hn takes a lot of power and transmitting will be the highest usage.

Just a guess but maybe you are running out of power.

Tom

I have POE Gigabit 40W I think power its not the problem

I'd suggest check your LMR cables - and separate your antennas more. the N radios are super sensitive to noise (or so we've found) we've had more than one leaky cable cause us trouble!

I try with same cables and same distance but with separate routerboards:

RB1 (1Radio)<-------------> RB2 (1Radio)
RB3 (1Radio)<-------------> RB4 (1Radio)

In this situation there is no problem, but the problem is when I use 1 RB with 2 radios.

I suppose thats because they are highpower and stacked, in an RB4xx series at least. Let me know if you ever get this to work It could explain why we have some poor performing links shared with high power N cards

I try to down tx power to minium value, then the consumption for each radio is lower.. But the problem persists.

There is a way to make double link simultaneous?

Thanks for all!