This visualization shows the
signal strength map (also called the coverage
map) measured in dBm.
Signal strength is one of the most important factors that influence
WLAN performance, as in the areas with low signal, establishing a
reliable and high-throughput link between the AP and client devices
is impossible. Signal level is shown for the AP that has the
strongest signal in the given map area among the APs selected for
analysis. You can deselect one or several of the selected APs to
see the signal level of less strong APs.
A signal level above -60 dBm is
considered excellent. Levels between -60 and -85 dBm are mediocre,
and levels below -85 dBm provide only marginal connectivity. Signal
strength is affected by the distance from the AP, AP output power,
type and direction of antenna, and, most importantly, physical
obstructions, such as walls, doors, windows, and their
Double-clicking on the signal
level legend on the status bar allows you to configure the color
scheme and change its value range.
When low signal areas are
discovered, the following solutions are suggested:
AP locations: You should minimize the number of obstructions
between the AP and the low signal zone. Additionally, the material
of the obstructions plays an important role; for example, the
attenuation factor of a brick wall far exceeds that of a cubicle
wall or window.
more APs: Sometimes repositioning APs does not provide the desired
effect, and the option becomes installing additional APs in the
different antenna: A high-gain antenna (if your AP supports the use
of such antennae) redirects radio signal in the desired direction,
thereby increasing the signal level in some zones and decreasing it
in the others.
||Increase output power: Some APs allow for
the adjustment of the transmission power. However, for most, the
maximum power is already set as the default factory setting.