Interference Map - Anritsu Field Master Pro MS2090A Measurement Manual

4-4 Interference Map

4-4 Interference Map
This section describes the Interference Map capability and key characteristics of Interference Map
measurement mode. This technique is used to geo-locate interfering signals with respect to the user's current
location. The user is required to travel with the instrument connected with a GPS receiver, directional antenna
and the MA2700A InterferenceHunter to more than one location to capture the triangulation of the interfering
signals. The resulting geo-location of the intersecting signals will get captured in the map.
The interfering signal is located by following the steps below:
1. Select System menu (3-line icon in the upper left corner), go to SETTINGS > GNSS (GPS), and toggle on
the GNSS/GPS.
2. Select System menu, go to TOOLS > MAP TOOL to download a digital map of the current location. Note
that Internet connection is required to download the map tiles of the selected location. Ensure to have
either an Ethernet or a Wi-Fi connection.
3. Connect the GPS, MA2700A handheld InterferenceHunter and suitable directional antenna (for e.g.
Yagi antenna) to the instrument.
4. Select MEASURE > MEASUREMENT> Interference Map.
5. Set up the frequency and span in order to view the signal of interest on the spectrum display. Ensure not
to make the span too wider, as this slows down the instrument's response in locating the interfering
signal.
6. Select SETUP>INTEGRATION BW and set an appropriate integration bandwidth to measure the
channel power of the signal of interest.
7. Select SETUP> VOLUME to increase the instrument's volume in order to listen for max channel power.
8. Slowly point the directional antenna in the direction leading to max channel power, either press the
trigger on MA2700A when pointing in the direction of the maximum power or press PLACE LINE under
SETUP menu. Refer to
9. Notice that moving the directional antenna will mark a red line on the map, which signifies the direction
of max power.
10. To view the interference signal, change the current location to another nearby different location
(~1 mile/km).
11. Repeat Step 6 through
12. Similarly change the current location to another nearby location and repeat
drop a third line on the map. The three lines should intersect at an approximate location of the signal of
interest.
13. You can choose a desired line by selecting an appropriate line from SELECTED LINE drop-down.
4-4
Section "SETUP Menu (Interference
Step 8 and drop a second red line on the map by clicking the trigger on MA2700A.
PN: 10580-00447 Rev. H
IA Spectrum Analyzer (Option 24)
Map)".
Step 6 through Step 8 to
Spectrum Analyzer MG