RDL-3000
User Manual
70-00158-01-DRAFT
Proprietary Redline Communications © 2010
Page
87
of 142
November 25, 2010
Spectrum Sweep Chart
Frequency (MHz)
: Center frequency of the scanned channel.
Ave (dBm)
: Average measured signal for all samples.
Max (dBm)
: Maximum measured signal for all samples.
Bar Graph
: Graph of average (dark green) and peak (light green) results.
Performing a Sweep
1.
Prepare the RDL-3000:
For PMP sector controllers, the transmitter is disabled automatically during a sweep.
Note: To run a sweep from a PMP Subscriber location, the sector controller
transmitter must be disabled for the duration of the test.
2.
Click
Wireless
Spectrum Sweep
in the main menu. It is recommended to scan
using the smallest available channel with a step size of 1/2 the planned channel
size (e.g., use a 5 MHz step size when scanning for a free 10 MHz channel). For
example:
Start/Stop = 5735 / 5830
Step [MHz] = 5
No. of Acquisitions = 10
3.
Click Start button to begin the sweep.
4.
Review the results. A channel may be considered 'clear' when free of interference
for at least +/
-
one-half the channel bandwidth from the desired center frequency.
For example, a 20 MHz channel should have no interference detected for at least
+/
-
10 MHz from the candidate channel.
When a potentially clear channel is identified, reduce the frequency range and step
size while increasing the sample size to monitor the channel over a longer period.
