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The signal is weak or fluctuating

Core Issue

The signal in the wireless network may be weak or fluctuating due to the following reasons:
Firmware and driver problems 
Software configuration problems 
RF impairments, including antenna and cable problems

Resolution

Problems with the radio frequency (RF) communications between Cisco Aironet WLAN components can usually be traced to three root causes:
Firmware and driver problems 
Software configuration problems 
RF impairments, including antenna and cable problems
For more information on troubleshooting this problem, refer to the Troubleshooting Problems Affecting Radio Frequency Communication document.

Problem Type

The signal is weak or fluctuating

Products

Access point

Bridge

WLAN adapters (wireless card) / ACU (Aironet Client Utility)

Base Station

Workgroup bridges

Antenna Type

Omni directional

Parabolic antenna

Patch antenna

Yagi

Link Status Meter Test Result

Poor