baldog wrote

With regarding the power output how do I adjust this this to make it more powerful is there a setting somewhere to boost the power?

Beware that raising power might violate regulatory provisions of the country you are living in. 17 dBm power + 13 dBi antenna gain equals 30 dBm, which is 1 watt. In many countries, this is already the maximum limit allowed. You should at least know this before getting into trouble. In which country you are living?

I believe you are already at max. setting as 17dB is indeed the max for Europe.

Since you're not getting a region setting drop-down selection menu this means you're running latest generation gear that have the restrictions hardcoded into the device, hence you don't get the chance to alter it.

Clear Line Of Sight as well as a clear freshnel zone must be considered a given in long distance links to establish a good throughput, so I'd begin with these two first before optimizing the link further which in summary involves selecting 20Mhz-only or even 10Mhz-only channel widths and reducing (in general) the MCS setting so that you can inversely increase the SNR out of your link and get a steadier throughput.

Victor Ramos wrote

1.- for that distance, has low power, only 17 dBm (50mW) is little for what gives the device 27 dBm (500mW) ..., raising the power technically should improve the link, the decent connection values It should improve the Signal Strength from -87 to -65 which is optimal ... the SNR should be up to 35dB minimum

Victor I'm under the impression that the values you quote here are unfair to say the least.

An SNR of -35dB means you're effectively sitting on 100% signal which is considered to be 'optimal' in terms of achieving a 1-to-1 (100%) theoretical Rx/Tx to selected MCS parity. No way is this even an implied prerequisite however to get a good throughput out of a wireless link. I've been getting 3/4 of a theoretical max with 25-28dB SNR in many many cases which I find pretty darn good for links over 3km away with clear LoS and clear freshnel zone.

baldog wrote

Thanks for the heads up. I'm in the UK, do you know what the max power output is for here? Do you have any other ideas for increasing the signal or is it just a case of moving the CPE's until i find a good location? Thanks

Maximum allowed EIRP in the UK is 30 dBm (~ 1,000 mW). So, for the CPE510 17 dBm + 13 dBi antenna gain equals 30 dBm, so 17 dBm TX power is already yielding the maximum EIRP and it is 1,000 mW, not 50 mW. You always have to take into account the antenna gain of the device, not only TX power.

The maximum TX power the CPE510's universal hardware can achieve (in TEST mode) is 23 dBm, not 27 dBm. This yields 23 dBm + 13 dBi = 36 dBm, which is 3.981 Watts or 3,981 mW. But the EU hardware is fixed to 17 dBm, no TEST mode anymore.

To achieve best results, use 20 MHz channel width, fixed 802.11n mode and correct distance setting (you can leave it at auto setting as long as it shows 3 km distance on the Status page). Make sure that the antennas of both CPEs are carefully aligned to each other.

To calculate the 1st fresnel zone and the 60% clearance zone, use the Air Link Calculator and set your coordinates on the map correctly: https://airlink.ubnt.com/#/

For a setting comparable to TP-Link's CPE 510, select 5 GHz, Airmax, 13 dBi antenna gain, maximum EIRP of 30 dBm and mounting height in the Calculator. This will show you the fresnel zone.

Try reducing your MCS rate from 15 to 12 you'll probably manage 1-2dB more