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Measurement example
Figure 30
Interference measurement in RSSI
NOTE
You can use the LIMIT hot key to analyze your measurements with the display line, multi-
segment line, and channel limit. See "Setting limit for interference analyzer" on page 119
for more information.
Interference finder
The Interference Finder is an automatic triangulation algorithm that uses GPS coordinates to locate
possible interference sources based on three measurements. The interference finder calculates
possible interference locations using its inscribed circle or circumscribed circle based on measured
intersection points. You can plot up to seven measurement points and select three that are more
representative for triangulation. JD780A series automatically logs measurement positions not to lose
them while changing measurement modes.
If you have obtained user experience data through JDSU's ariesoGEO and generated raster data files
from the application, you can load them onto your route map to help you troubleshoot problems easily
and quickly.
Loading a map
After you have made connections as described in the "Connecting a cable" on page 94 and configured
test parameters as described in the "Configuring test parameters" on page 96, you need to load a map
of the area where you want to go out and do interference hunting.
Procedure
Plug in your USB drive that has a map file in .mcf file type created in JDMapCreator. If the
1.
JDMapCreator application on your computer is connected to the instrument via USB or LAN,
you can send a map file with a single layer to the instrument directly by using the Send to EQP
menu in JDMapCreator.
NOTE
The JDMapCreator converts and resizes any scanned floor plan or layout to fit onto your
instrument's display. JDMapCreator 1.2.0 or later can save a multiple-layered map,
Using Interference Analyzer
JD780A Series Analyzers
109
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