We should now inspect both the ‘Mean values’ and
also the ‘Max Values’. Both are of importance. The
graphics are interpreted as follows:
IP Address:
This particular radio site.
Max Peak:
Highest level of received signal at
this instant in dBm.
Max Hold:
Highest level of historically
received signal in dBm. Since ‘Hold’ button
activated.
Hold:
Activates the red color graphic. Shows
historical peak signal received.
Clear:
Deactivates the red color graphic and
disables historical peak (Max Peak = Max
Hold)
Show Mean Value:
Mathematical average of
received signals per frequency over reporting
period.
Show Max Value:
Highest recorded signals
per frequency over reporting period.
RSSI:
Receiver Signal Strength Indication in
dBm.
Upon conclusion of Spectrum Analyzer activities,
‘Close’ the Spectrum Analyzer. This will permit normal
network communications activities through the radio.
Password
There is both encryption and password protection. It
is your own responsibility to record and track these
entries. From the factory, the Spectrum Analyzer uses
a default name of: ‘admin’ and a password of: ‘admin’.
This activates the Spectrum Analyzer. The screen
display indicates received signal activity. Note that
we are using spread spectrum so not all RF signal
channels are in use at all times for our particular
network. However, there are other radio services and
other electrical equipment that also share this band
and may use RF signal bursts on a more continuous
basis than our own network. This Spectrum Analyzer
may be used to assist in an RF site survey to
determine other RF spectrum transmitter signals in
the vicinity of this radio site. The screen displays the
presence, of such signals as well as relative signal
strength. This screen is updated every few seconds.
You may want to take a screen shot of the graphics for
a comparative interpretation of the RF spectrum. It is
desirable that the signal strength of the WNM network
be 10dB (or higher) greater than other RF signals to
obtain optimum transmissions.
The above displays the spectrum at this radio site
with the aid of numeric fields and color coding. We
use spread spectrum technology, so it will operate
successfully, even with an occasional missed packet.
The Interface Solution Experts
33
WNM
Wireless
Network Module