Normal power target for EU

[ozzed]

Hi!

I was looking at my routers (Asus RT-AC87U with latest Merlin Firmware) power target and it says :

admin@RT-AC87U-0C08:/tmp/home/root# wl txpwr_target_max
Maximum Tx Power Target (chanspec:0x1803): 13.50 13.50 13.50

Region says EU. I thought the max target in EU is 20dbm? Are those correct values, or is it not Dbm? In that case, what does 13.50 actually mean?

 

[L&LD]

Max target power is total effective power, including any gain from antennae.

In any case, these are not adjustable anymore (as per June 2016 FCC rules).

 

[ozzed]

Max target power is total effective power, including any gain from antennae.

In any case, these are not adjustable anymore (as per June 2016 FCC rules).

I know, I'm not asking about adjustment. It's more that I thought it was 20dbm, not 13.5, and this made me wonder if it even is dbm that is the unit. What I'm curious about is what the 13.5 stands for.

 

[L&LD]

It's the maximum power the power amplifiers are able to produce to get at or below the maximum admissible power of the unit as a whole. This is an arbitrary value the designers of the circuit have chosen. The important part to note is that it is not the output power of the router as a whole.

 

[ColinTaylor]

@ozzed I'm a bit surprised by those figures. My AC68U has 15.50 15.50 15.50. Perhaps there's a 2dBm antenna gain that it's not including.

15.5dBm=35.5mW times 3 (for each antenna) = 106.5mW total.

What do you get for the following?

# nvram show | grep maxp2ga | sort
size: 43318 bytes (22218 left)
0:maxp2ga0=106
0:maxp2ga1=106
0:maxp2ga2=106

 

[joegreat]

Region says EU. I thought the max target in EU is 20dbm? Are those correct values, or is it not Dbm? In that case, what does 13.50 actually mean?

Hi,

Yes, the EU regulation allows higher outputs then the US would allow, but the vendors limit the power down to the minimum requirements from US - at least I think this is the case.

So, you will have not luck to get higher transmission power out of your router with official firmware...