Troubleshooting/FAQ
7.2 Disrupted data transmission due to the received power being too high
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08
299
Disrupted data transmission due to the received power being too
high
Causes and effects of excessive received power
If the received power at the input of a WLAN is too high, this overdrives the amplifier circuit.
Overdrive can occur on clients and access points. If the receive power on the device is
greater than -40 dBm, this can result in disrupted communication.
Information about the signal strength [in dBm] is displayed in WBM on the following tabs:
Information > WLAN > Client List
Client mode: Information > WLAN > Client List > Available AP list
The power of the input signal on the IWLAN device is influenced by the following factors:
● Distance between the WLAN partners
● Reflections of the electromagnetic waves by parts of the building
● Setting for the "Max. TX Power" (Interfaces > WLAN > Basic) and the antenna settings
used (Interfaces > WLAN > Antennas).
If communication is disrupted by an excessive signal strength (greater than -40 dBm), you
can eliminate the problem in the following ways:
● Increase the distance between the transmitter and receiver.
● Reduce the transmit power of the IWLAN partner with suitable settings in WBM or CLI.
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