Within various intel documentation it lists the following explanation with regards to adaptor TX power settings......
The optimal setting is to set the transmit power at the lowest possible level still compatible with communication quality. The setting allows the maximum number of wireless devices to operate in dense areas. It reduces interference with other devices that share the radio spectrum. If you decrease the transmit power, you reduce the radio coverage.
What are the dBm ranges or fixed rate associated with each setting???
We understand you're looking for more information regarding the Transmit Power advanced setting on your Intel® Wireless Adapter.
For actual dBm ranges you will need to engage your http://www.intel.com/content/www/us/en/support/topics/OEMs.html computer manufacturer, as this will be country and antenna dependent.
As for a fixed rate associated with each setting, we will need to investigate and see if we're able to share this information.
To help with this investigation, please share the following:
1. Brand and model of your computer.
2. What is the model of your Intel® Wireless Adapter?
I have engaged Intel engineers and they have provided
documentation for many topics but it does not include this detail, in regards
to dBm values at the TX power settings.
Although we have many laptop/adaptor combinations, for the
purpose of discussion I am using a Lenovo T470 with a Intel(R) Dual Band
Wireless-AC 8260 adaptor. I am located in Canada.
At this point, we're not able to provide any additional details in regards to the adapter's transmit power settings. Our current instruction is that this information should be provided by your computer manufacturer, if available.
Perhaps you could provide more information about the problem that you're facing, we may be able to provide some suggestions or guidance.