7 Direction Finding Mode
136 IDA-3106 Narda
7.4.2 Discrete Horizontal Scan (Discrete)
Direction Finding (Horizontal Scan: On)
This method is particularly suitable for variable signals, which need a longer
RMS averaging time for detection. After you start the measurement, a new
measurement value is added each time you press the button. Once you
have enough measured values (at least three), you can stop the
measurement.
NOTE: Further information on using polar diagrams and interpreting the results is
found under Horizontal Scan in practice on page 269.
To make a Discrete Horizontal Scan:
1. Set the measurement parameters as desired.
2. Press the Scan Type softkey and select Discrete.
3. To start the measurement, press the button on the antenna handle or
press the Start & Add Value softkey.
4. Point the antenna in the desired direction and press the button on the
antenna handle or press the Add Value softkey on the Basic Unit.
The first measurement value is saved and shown in the polar
diagram.
5. Save further measurement results in the same way.
6. Press the Delete Last Value softkey to delete the last value you added.
7. Press the Stop softkey to end the measurement.
The results are shown in the polar diagram and displayed
numerically.
8. Press the SAVE key on the Basic Unit to save the measurement results.
A window shows the save process.
9. To start a new measurement, repeat the steps from step 3 onwards.
(Starting a new measurement automatically resets the instrument.)
NOTE: If you pan the antenna too quickly or tilt it by more than 15° horizontally or
vertically (elevation: ±15°, polarization: ±15°) Azimuth uncertain will be
displayed in red to indicate that deviations can occur in the bearing that is
determined.
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