STA receives strong signals from an AP, but the network speed is slow. How can I locate the problem

Locate the problem as follows:
1. Check the number of users associated with the AP. The number of associated users cannot exceed the upper limit allowed by the AP.
2. Check the channel and power of the AP. The channel and power must be set to fixed values, but cannot use default settings.
3. Change the connection mode on the AP to high-speed access.
4. Check whether upstream bandwidth limit is set on the AP.
5. Check antennas on APs:
- The interval between the antennas on different APs cannot be smaller than 10 m.
- The interval between the antennas on the same AP cannot be smaller than 7 m.
6. Use the dedicated tools to scan adjacent-channel interference. Check whether there is strong interference near the STA.

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