Yes, the documentations are correct. Since WifiWave2 drivers appeared it is like this, it is fixed to your country regulations. You can set only lower output (higher number). Regarding to my knowledges the antenna gain is calculated and automatically set/corrected according to mentioned regulations. For those reasons i dont see any chance for manual tx power/superchannel/no_country_set or “whatever”, since it goes against laws and the manufacturer has to follow them.
Minimum antenna gain is only fixed for devices with permanently attached antennas. Devices, which only have antenna connectors and one has to use external antennas, don’t have it set (or they have it set to 0).
I don’t think that use case where antena feeder losses are greater than antenna gain (so combined they are less than 0dBi) is a realistic one.
As you can see that is not true. hAP ac³ has detachable antennas but stock antenna gain hardcoded into firmware (according to what I can see). Developers assume one will never attach antennas with lower gain or have losses in feeder lines?
So WifiWave2 drivers written not by Mikrotik? As wireless package have all this features. I think antenna gain just hardcoded into firmware.
I’m asking because wifi-qcom-ac and wifi-qcom packages look really unstable and a lot could change in the future. Packages was split because lack of space to put all the required features already.
Calm down. No need for wifi-qcom-ac bashing.
Even on legacy wireless you weren’t able to set antenna-gain below the value of the physical built-in antenna.
So yep, hardcoded by device probably. There are no outside connectors for the antennas on that particular device, so why should MT support it? Just because someone likes to replace directly attached antennas on the board?
The antenna-gain parameter makes no difference when you put full power on the output. What I understood from reading forums (including this one) is that antenna-gain parameter value truncated from regulatory domain max power allowed and that would be transmitter max power:
= -
Are we talking about the same device? hAP ac3 has detachable antennas
Yes, but this device is an indoor device and is certified only for indoor use, this is why such restrictions are there. Normally people want to set lower gain than the actual antenna that is uses, to force higher TX power. This is not allowed.
I see, so, to recap, and if I get it right, two conditions must be true:
the device has external antenna connector
the device has been certified/approved/whatever (also) for outdoor use
to allow the final user to set freely the antenna gain, otherwise the lower limit is that of the antenna shipped with the device (and presumably part of the certification).
In this process, due to rounding (or for whatever other reason), 6-5.5=0.5 dB are lost forever.
Long transmission antenna lines (extension cables)
New antennas are more beautiful (we are talking about SOHO indoor devices)
So If I understood this trend correctly all future MT routers will have fixed antennas like most SOHO routers on the market have? Because there is no legitimate use case to change them.
Me confused. Does hAP ac3 forcefully apply antenna-gain=6 on ROS7 for some countries, but not for others, and this is supposedly intended behavior? Or is it forcefully applied for all countries? Is this the case regardless of factory firmware version?
Well, changing antennas to weaker but more omnidirectional seems like the only legitimate way to take advantage of the detachable antennas, you know, at least with a device that is “certified only for indoor use”.
