u mean i can't go above 15mbps with 5ghz-10mhz
but my isp said that this band is for long distance do u confirm this info
By using 10Mhz instead of 20Mhz the radio transmitting energy is bundled in a narrower channel. Thus the ´reach´ increased some or, at the same distance, a station will receive a bit stronger signal. (approx. 2/3dBm)
You can even go to 5Ghz.
The downside is that 10Mhz channel halves the possible data throughput compared to 20Mhz and 5Ghz does so again.
Rule of thumb is that your actual usable data throughput is sort of 50-60% of the connected stable data rate both antenna's maintain.
So, in 20Mhz you have a theoretical max. data throughput of 56*50% is 28Mbps.
In 10Mhz this would be 56/2*50% is 14Mbps.
In 5Mhz this would only be 56/4*50% is 7Mbps.
And this is all when radio's can connect to highest data rate with a signal of at least -73dBm.
If signals are worse than this the radio's will try to communicate at lower rate.
If rates are set to ´default´ on both ends or many options available the link will probably jump between data rate settings which each time creates extra overhead on the traffic and thus further decreases your throughput.
So it is also wise to set the data rates such that links don't ´jump`too much in connected data rates. Better a lower rate with high quality than a high rate with many data getting lost!
