Result
The firmware is transferred to the device.
Note
Please note that the transfer of the firmware can take several minutes. During the transmission,
the red error LED (F) flashes.
Once the firmware has been transferred completely to the device, the device is restarted
automatically.
8.2
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).
Solution
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.
Troubleshooting/FAQ
8.2 Disrupted data transmission due to the received power being too high
SCALANCE W1780/W1740 according to IEEE 802.11ac Web Based Management
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Configuration Manual, 11/2019, C79000-G8976-C485-03