ST 500 "Piranha" Operation Manual: Selective HF Detector Channel
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3.3.2. OSCILLOSCOPE
To analyze the demodulated signal with the oscilloscope use the keys
to select the
corresponding table row and press "F3". Functionality and controls described in
To turn off the OSCILLOSCOPE, press "F3" or "ESC".
3.4. "WIRELESS COMMUNICATION" MODE
The "WIRELESS COMMUNICATION" mode is intended for the detection of signals of the
common digital communication standards.
ST 500 makes it possible to monitor operative frequency bands of mobile communication
devices separately from those of base stations (if such division is specific to the communications
standard). The operative frequency bands of Russian mobile communications systems are set by
default. The constitution and parameters of these bands can be adjusted using
The "USER LIST" function allows monitoring pre-defined frequency bands that are the most
likely to be utilized by radio eavesdropping devices. The number of these bands, as well as their
boundaries, are also set with the aid of ST 500 software.
The "WIRELESS COMMUNICATION" mode is activated from the "PANORAMA" or DIFFERENTIAL
mode by pressing "F1". The "MOBILE DEVICES MONITORING" function is launched automatically.
3.4.1. "MOBILE DEVICES MONITORING" FUNCTION
This function helps detect active mobile digital communications devices and analyze their
signals in the corresponding frequency range. The screen is shown in fig.16.
Fig.16
In fig.16:
1 - active channel
2 - active option (highlighted)
3 - list of digital communication standards
4 - signal levels (green for current level; maroon for peak signal level within the range
over the whole monitoring period)
