Hi!
I am quite new to new ROS7 wifi interface - I have bought two L22UGS-5HaxD2HaxD devices and I would like make point to point link with 5GHz AX - I am wondering if I can use 20/40/80+80 or 20/40/160MHz (or it supports only 20/40/80MHz) channel width? Any idea which frequencies should be chosen to make this work as I get “No supported channels” on AP part.
Thank you everyone,
Luka
While waiting I was able to set it up on 5300 MHz eeeece (20/40/80/160MHz)… And I am happy also with 1 minute waiting for DFS. I would like to know if there is a possibility to do something about TX power - can it somehow be manually increased?
Tx power is (hard) limited by Tx power amplifier capability (it seems to be 28dBm for mANTBox ax), by country regulations which take antenna gain into consideration (15dBi for 5FHz band is probably hard coded), that’s EIRP. If country regulation for your whole channel span used is at e.g. EIRP=30dBm, this means that actual Tx power (output from power amplifier) will be limited to 15dBm.
The only thing you can do about the above mentioned things is to manually select frequency and channels used to those which allow higher EIRP.
Next thing which affects usable signal range, is considering total band width used. The numbers, mentioned in product page (Tx power and Rx sensitivity) are measured while using single 20MHz channel. However, when using wider channels (e.g. 80MHz or even 80+80/160MHz), the Tx power spreads over wider band width and “reference” signal strength drops accordingly - every doubling band width effectively reduces signal strength by 3dB … so 80MHz channel means -6dB in signal strength, 160MHz (or 80+80MHz) channel means -9dB in signal strength. The power “reserve” due to EIRP regulations don’t help here, EIRP refers to total radiated power (over wide channel).
And Rx sensitivity doesn’t change with wider channels.
All in all this means that if signal strength is on the lower end of usable range, it’s often better to step back to a bit narrower band width … this means a more stable link at similar achievable throughputs (sometimes it can be higher with narrower band width, sometimes it can be worse).
Thank you very much for explanation.
not very impressed with the performance of the L22UGS-5HaxD2HaxD 10 to 15 db signal loss very bad with interference weak performance vs the nv2 protocol, hope MK no superchannel not mush to set on this devices