The Manual Diagnostics Tool is installed with Intel® PROSet/Wireless Software, just make sure you customize the installation and select all the software components when you set it up.
http://www.intel.com/content/www/us/en/support/network-and-i-o/wireless-networking/000005787.html Running the Intel® PROSet/Wireless Software Manual Diagnostics Tool
https://downloadcenter.intel.com/ Drivers & Software
You did not specify the OS or wireless adapter that you have, so, it is worth to mention that this tool is not available for Window® 10.
We haven't seen any new messages since our last post. Please let us know if our recommendations were helpful, or provide the OS and wireless adapter information for further assistance.