Is the Qualcom wifi chip in the CAPAC affected by the adaptive-noise-immunity setting? (the wiki states atheros and newer wifi chips - wondering if the IPQ-4018 falls under the category of newer wifi chips?)
Why is the max and default setting for TX power set at 17db???
Last time I checked standards.
a. NA - 5AC goes from 200mw indoor to 1000mw indoor/outdoor
Europe - 5AC goes from 200mw indoor to 1000mw indoor/outdoor
b. NA -2G - 125mw
Europe -2G - 100mw
Short overview of the ETSI standard:
– 2.4 GHz: 100 mW (20 dBm)
– 5 GHz channel 36 to 64: 200 mW (23 dBm)
– 5 GHz channel 100 to 140: 1000 mW (30 dBm)
– 5 GHz channel 155 to 171: 4000 mW (36 dBm)
As you can see a setting of 17dBm DOES not reflect the max allowable indoor tx power in the standards???
For excrement and laughter I decided to look at a unifi model comparable to the capac. (Their LITE version)
Guess what I found in the specs…
Maximum TX Power
2.4 GHz / 20 dBm
5 GHz / 20 dBm
If you understand dBMs, 3Db change effectively doubles the power component. No wonder ubiquiti wifi kicks ass in comparison! (probably much more sophisticated wifi handling as well but thats another issue and you pay more for their products so there are choices to be made).
The LR version has 24dBm/22dBm respectively
The Pro version has 22/22 respectively
(Atheros (AR7240 chipset I believe)
Specs say that max Tx power of cAP ac is 26 dBm (both 2.4 and 5GHz radios), but Tx power backoff when using higher modulations (e.g. MCS7 or MCS9) is very high (as much as 8dB). Country limits, built in ROS 6.45.7, for Canada define max 30dBm in 2.4GHz band (which is total EIRP for all Tx chains combined and including antenna gain) and 23-30 dBm for 5GHz (depending on particular channel).
BTW, some time ago there was a discussion about whether the Tx power means power per Tx chain or total Tx power. I don’t remember what was the consensus. However, if tge number is per Tx chain, then one has to sum Tx powers of all Tx chains (result is +3dB when 2 Tx chains, +5 dB when 3 Tx chains and +6 dB when 4 Tx chains).
Could well be that different brands report this differently.
What we can agree upon MKX, is that you are wrong HAHAHAHA.
Seriously, the explanation and information we have on the TX power settings is woefully inadequate.
If you read the WIKI, the max power of TX is set in defaults of the chip (eeeprom - sounds invasive) which in the case of CapaC, if you have one, is 17dBm.
In fact the WiKI says that if you increase the TX power then you will overheat the circuit board and eventually break the tx…
Where is your source ref for the max tx power of the capac??
Whatever… I tried on my hAP ac2 (also runs off IPQ4018) … if the “tx-power-mode” is set to “default”, then there’s no mention of tx-power nor tx-power-mode in exported config. If I change tx-power-mode to all-rates-fixed (the only other value accepted), then indeed value of tx-power appears in exported config if the value is anything but 17.
I guess you were referring to https://wiki.mikrotik.com/wiki/Manual:Wireless_FAQ … it doesn’t mention tx-power-mode setting manual-table which appears as possible value from within ROS CLI. Not that I can set it on hAP ac2 …
I agree that the mentioned Wiki is really scarce with information about tx power settings …