TECHNICAL DESCRIPTION AND OPERATING MANUAL ST131 <PIRANHA II> and ST131N
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3.6 SUB-MODE "SCALE".
In this sub-mode the level of signal is represented in the form of a multi-segment scale.
Input and output from this sub-mode are performed by pressing
.
"SCALE" is the main mode for the "RADIO 4–18 GHz” channel and auxiliary sub-mode for other
channels.
In fact, this sub-mode is a graphical representation of the interpretation of the signal level to
facilitate localization STM for their direct search.
In general, the principle of display and search method are similar to devices for searching STM
like a broadband bug detectors.
In this sub-mode the maximum signal level in the FULL RANGE or BAND mode is displayed.
Figure 30 shows the screen image of the "RADIO 30-4400 MHz” channel in the FULL RANGE
mode.
1
The numerical scale grading
2
Signal level scale
3
Level and maximum signal frequency value
__________________________________Figure30_________________________________
Figure 31 shows image of the screen for the "RADIO 30-4400
MHz” channel in the BAND mode.
1 Lower, central and upper frequency of the current band.
2 Analysis bandwidth.
_____________________________
Figure 31___________________________________
Setting of the scale relatively to the noise level with pressing
.
The horizontal offset scale by pressing buttons
and
with 5 dB step.
Increasing the number of simultaneously red light segments will fit approximation to the
radiation source or increase of its signal level (considering the inherent features of a particular channel).
In case scale is completely filled with red light segments and the location of the radiation source not
found, it is necessary to press the button
repeatedly to shift the scale.
