User's Manual

EnRoute50x/51x User’s Guide
TR0153 Rev. D2
52
7.4 Transmit Power
The transmit power of the mesh radio is configurable. Increased output power will improve
communication range, but will also extend the interference range of the radios. It is suggested
that the transmit power is initially set to the maximum level for an installation and is then
reduced if it is determined that the transmit power far exceeds the level required to maintain
links. It is also recommended that a common transmit power value is used for all nodes in a
mesh to reduce the likelihood of asymmetric links. The default transmit power is 22dBm.
The mesh radio’s transmit power value must be less than the default value to
be in compliance with FCC regulations. Setting a value greater than the default
power is prevented by the software.
CLI
The example below shows how to set the mesh radio‟s transmit power with the „txpower‟
parameter in the „mesh0‟ interface . Note that the parameter specified in the CLI is not in dBm.
Refer to Table 8 for converting between CLI parameter values and dBm.
> use mesh0
mesh0> set txpower=33
txpower
Output Power (dBm)
1
9
9
10
14
12
18
14
22
16
26
18
29
20
33
22
Table 8. Mesh radio output power settings in the CLI
Web GUI
The mesh radio transmit power can be set via the web interface using the “Mesh” tab on the
“Wireless Interfaces” page (see Figure 27).
7.5 RSSI Threshold Levels
The mesh networking algorithm evaluates link qualities to neighboring mesh nodes and only
considers links with a received signal strength indicator (RSSI) value equal to or greater than