NARDA IDA, Руководство по эксплуатации, Страница: 275 / 292

18.1 Holding and panning the directional antenna properly
Narda IDA - 3106
267
Visual check (Azimuth uncertain)
The elevation and polarization are monitored continuously during a
Horizontal Scan. If an angle of
15°
is exceeded, the display indicates
Azimuth uncertain
to warn you that the bearing result may be impaired.
Figure 59:
Azimuth uncertain
indicates that the antenna is not being held properly.
In this example, the elevation angle is much too high at 18.5°.
Audible check (Tone Search)
In addition to the
Azimuth uncertain
indicator, you can activate an audible
check (
Tone Search
) similar to the park distance control system in an
automobile. Deviations from the ideal central position are signaled by an
intermittent tone that changes to a continuous tone as the angle increases.
• ±7.5° to ±15°: intermittent sound
•

15° and

-15°: continuous sound
To activate tone search:

The
Direction Finding
menu is selected.
1.
Press the
Audio
softkey, then press the
Tone Search
softkey.
2.
Select
Leveling
using the rotary control knob and press
OK
to confirm.

Tone Search is activated.