L3Harris Narda SignalShark, Руководство пользователя

Страница: 155 / 231

Bearing View
155
Setting the scan count number (Scan Count)
Sets the number of counted scans.
Changing the parameters:
1.
Tap the button and set the number of scans either by using the rotary control knob or by
entering the value.
2. Tap the OK button.
3.
Press the
Esc
key or tap the header to close the menu.
Defining the stop behavior (Stop Mode)
The stop mode value changes the behavior of the measurement engine, after the
Run
key is
pressed.
•
Hold
: Measurement continues in the background.
•
Stop
: Measurement stops and runs again.
You can stop/hold the measurement using the Run key.
To change these parameters:
1. Tap the toggle button to select Hold or Stop .
2. Press the Esc key or tap the header to close the menu.
Setting the squelch (DF Squelch)
Only signals with a level higher than the DF Squelch parameter will be used as a bearing.
This parameter can be used to separate strong signals from low ones and to avoid bearings
degraded by the noise floor.
Setting the squelch:
1. Tap the DF Squelch button.
2. Turn the Rotary knob or enter a value to set direction.
3. Press the Rotary knob or tap the OK button.
Setting the minimal stability (min Stability)
It is important for a correct bearing result, that the signal level is constant during a complete
bearing cycle. Therefor, SignalShark calculates the level difference of the omnidirectional
antenna element between two cycles.
With the parameter
min Stability you can enter the maximum level difference in dB that is
allowed during a bearing cycle.
This parameter can be helpful to:
•
Discard bearings with too much level fluctuations.
•
Guaranty correct pulse acquisition.
Setting the squelch:
1.
Tap the min Stability button.
2. Turn the Rotary knob or enter a value to set direction.
3.
Press the
Rotary knob
or tap the
OK
button.