TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N
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• «AVERAGE» - the analysis is done 8 times and the averaged results will be taken (total cycle is
about 1.6 seconds). This option reduces the chance of detection of the accidental spontaneous pulse
signal.
In case of the indefinite situation, set the “PEAK” option.
After pressing on the
button - signal analysis begins with a change of information in
position 1, Figure 23.
The consecutive analysis executes throughout range or band with a resolution of 40 KHz (if there is
more than 10 MHz analysis bandwidth).
1 At the time of analysis with format XXX / YYY:
XXX - counter of detected signals;
YYY –percentage of completion of analysis (%).
Upon completion of analysis:
XXX - number of the signal with marker on it;
YYY - the total number of signals exceeded the threshold level.
Upon completion of the analysis, following options are possible:
• to work with a list of signals by pressing
.
• to stay with the spectrogram and press
(the title of the button will change to
)
that will provide an opportunity to set the marker over the signals which exceed the threshold and
switch the marker to other signals by rotating the rotary knob or pressing
and
.
BAND
NARROW - less than 100 KHz;
WIDE - from 100 to 1000 KHz;
VERY WIDE - more than 1000 KHz;
LEVEL - signal level value;
EXCEESS - excess over the set threshold level.
CONTEXT BUTTON FUNCTIONS ______________________________________________________
- go to the selected signal spectrogram. When pressed, it will be a transition to the selected
signal spectrogram with the position of the signal line in the center of the screen and 10 MHz bandwidth
(the BAND mode). The first press causes warning message to appear: "Unsaved results of analysis
will be lost. Continue? If YES, press ‘1’ If NO press other key".
- transition to the current spectrogram.
- highlight signal string in red or green, for example, for dividing into legal and suspicious
signals.
- removing signal from the list of signals.
To save list of signals in the memory of the device, press on
and then on
.
In the future, to display a list of memory you need to press on
, and further on
.
Figure 24
Figure 23
