NARDA IDA, Operating Manual, Page: 144 / 292

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.