Troubleshooting/FAQ
8.2 Disrupted data transmission due to the received power being too high
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 08/2018, C79000-G8976-C267-13
433
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 SCALANCE W device is too high, this overdrives the
amplifier circuit. Overdrive can occur on clients and access points. If the received power on
the SCALANCE W device is greater than -35 dBm, this can result in disrupted
communication.
Information about the signal strength [in dBm] is displayed in WBM in the following tabs:
Access point mode:
● Information > WLAN > Client List
Client mode:
● Information > WLAN > Available AP
● Interfaces > WLAN > Signal recorder
The power of the input signal on the SCALANCE W device is influenced by the following
factors:
● Distance between the WLAN partners
● Reflections of the electromagnetic waves by parts of the building
● Setting of the "max. Tx Power" (transmit power) (Interfaces > WLAN > Basic) and the
antenna settings used (Interfaces > WLAN > Antennas).
If communication is disrupted by an excessive signal strength (greater than -35 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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