User's Manual

AR24027 Operator’s Manual (rev E)
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monitor-link
clear=0 or 1
This command continuously displays link statistics with its peer. The statistics include, for
each direction of the link, the channel, speed, transmit power, RSSI, link distance and
cumulative number of packets sent and lost.
The “clear=1” parameter clears the cumulative counts in the report.
Examples:
>monitor-link clear=1
spectrum-analysis
input=a-antenna or b-antenna
display=graph or table
dwell-time-ms=0..1000
This command performs a scan of all
the channels in the band, dwelling on each channel for the
specified amount of time (defaults to 20 milliseconds). While on each channel it measures the
RSSI for that channel and stores its peak value. It then displays the data collected in a
graphical or table formats (defaults to “graph”).
During the test the RF input into the radio can be selected between one of the two antennas.
Note that even though the AR24027 channels are spaced 2 MHz apart, the receiver RF
bandwidth is approximately 5 MHz. Therefore the RSSI value reported for each channel
represents the total energy in an 5 MHz band centered around that channel. For this reason, a
narrow band transmitter will show up in the spectrum analysis report as a lobe with 5 MHz
bandwidth. Conversely, you do not need to find a quiet 5 MHz wide region in the spectrum
analysis report to select a quiet channel, i.e., any single channel sample that shows a low
“noise” level, is a good candidate to select as a receive channel.
Examples:
>spectrum-analysis input=b-antenna
>spa dwell=500
time-analysis
channel=0..50
input=a-antenna or b-antenna
display=graph or table
dwell-time-ms=1, 2, 5, 10, 20, 50, 100, 200, 500
This command measures the RSSI for a single
channel over a period of time. Each “sample”
consists of the maximum RSSI measured during the dwell time specified (defaults to 20
milliseconds). After collecting 60 samples the RSSI values are displayed graphically or
numerically (defaults to “graph”).
In this test the RF input into the radio can be selected between one of the two antennas.
Example: