Instruction manual

WLAN
DLoG Config Manual V3.10 39
13.2. Signal strength and quality
S = Signal
strength
This value provides information about the strength of the signal
received by the DLoG computer.
The signal strength can be displayed as a dBm value, in
percentages, or as a diagram, depending on the configuration
selected in the WLAN dialog.
Q = Quality This value provides information about the quality of the signal
received by the DLoG computer.
The quality can be displayed as a dB value, as a percentage, or as a
diagram, depending on the configuration selected in the WLAN
dialog.
Host name The host name is displayed according to the setting in the WLAN
menu.
IP address The IP address of the DLoG Industrial PC is displayed according to
the setting in the WLAN menu.
13.3. Basic legend for signal strength
Signal strength alone says nothing about the quality of the signal. The quality depends
on the ratio of signal to noise (SNR = Signal/Noise Ratio = RSSI, Radio Signal Strength
Indicator).
The following values are a good rule of thumb:
• Signal strengths less than -70 dBm are good.
• Quality between 10 and 20 dB is good.
Important: These values are only approximate and depend on many factors (different
sensitivity of receivers, data bandwidth, etc.)