"Kassandra-SO" Two-channel complex for monitoring and digital analysis of radio signals 9 kHz - 21 MHz

Two-channel radio monitoring (radio control) and digital signal analysis complex "Kassandra-SO" (eng. "Kassandra-MD").

Kassandra_SO_small The complex is designed for long-term (including round-the-clock), periodic or operational monitoring of the radio environment, digital processing and analysis of signals, detection of unauthorized radio emissions in the inspected premises, including transmitters using complex algorithms to hide their work (with accumulation of information, with frequency tuning, broadband and noise-like emissions, etc.), detailed study of radio signals, localization of radiation sources, as well as for creating archives of radio monitoring results.

"Kassandra-SO" is capable of radio monitoring at a rate of at least 2.2 GHz/sec per channel with a frequency resolution of no more than 40 kHz, storing in the computer memory panoramas of frequency ranges, spectra of individual signals and the main radiotechnical parameters of the detected radio signals. The complex has 2 identical channels of radio frequency paths and allows to work in synchronous mode (2 channels are synchronously tuned in frequency and recording of IF reports is performed from one hardware pulse) and in asynchronous mode (each channel works as an independent single-channel radio monitoring complex, independently of the other channel).

Operation of the radio monitoring complex "Kassandra-SO":

"Kassandra-SO" and the digital signal analysis option "DTest":

The "Kassandra-SO" complex solves the following tasks:

• panoramic spectral analysis;

• evaluation of radio signal parameters;

• digital analysis of DECT, GSM, UMTS (3G), Bluetooth, TETRA, APCO 25, DMR signals; 802.15.4 (zigBee, etc.)
• analysis of Wi-Fi networks;

• vector signal analysis;
• demodulation of analog video transmitters in the entire operating frequency band (25 MHz - 21 GHz);
• analysis of the HF component of wired networks;
• radio monitoring in remote access mode (control of remote equipment over the network);
• localization of radio emission sources indoors;
• creation of radio coverage zone maps.

The "Kassandra-SO" complex performs the following functions:
• two-channel synchronous and asynchronous operation mode in real time;
• accumulation and maintenance of a panorama database (for the entire period of operation) and processing of measurement results (panoramas);
• recording radio signals on a PC hard drive in the form of spectra and quadratures (I/Q) for at least 60 seconds for subsequent processing;
• detection of various types of radio microphones within a room, including scrambled ones and those using complex types of modulation;
• localization of detected radio microphones using the amplitude direction finding method;
• detection of noise-like signals, signals with frequency tuning and signals with ultra-short data transmission (up to 1 ms);
• remote radio monitoring of premises;
• monitoring of wired networks.

The "Kassandra-SO" complex provides:
• two-channel synchronous and asynchronous reception of signals in the entire operating frequency range with a tuning speed of at least 2200 MHz/s (when operating in the range from 9 kHz to 3 GHz) with a frequency resolution of 40 kHz, recording in the computer memory of the main radio engineering parameters of the detected radio signals in automatic mode;
• remote control of equipment using a computer network, including obtaining geographic coordinates of the position of the equipment and the demodulated audio signal in real time;
• HF and LF analysis of received signals with documentation of the analysis result;
• automatic identification of digital standards DECT, TETRA, APCO P25, 802.15.4 (ZigBee, etc.), Bluetooth, GSM, UMTS (3G), Wi-Fi with demodulation and analysis of packet headers (selection of unique identifiers of subscriber devices and base stations);
• measurement of packet amplitudes of each individual subscriber device and base station for their localization.

The main unit of the complex is a compact monoblock that can be carried in a standard computer bag without revealing the fact that the radio monitoring complex is being brought to the facility. Short-term operation of the main unit in the bag is possible.
The main unit housing has 2 LF antenna inputs 9 kHz - 25 MHz, 2 HF antenna inputs 25 MHz - 6 GHz, 2 microwave antenna inputs 6 GHz - 21 GHz, a LAN port, a power connector, power status indicators, and an on/off switch.
Two identical radio receivers, a two-channel digital signal processing and data transmission unit are located inside the main unit. In addition, a battery pack is connected to the main unit.
The complex is controlled and the results of its operation are processed by a computer that is connected to the main unit via a LAN port with a throughput of 1 Gbit/s. All information about the operation of the complex and received signals is presented to the operator in the form of graphs, diagrams, panoramas, spectrograms, tables.
The hardware unit, as well as antennas with a set of cables, accessories and accessories of the complex are placed for transportation in the working kit.
The control PC (laptop) is placed in a standard bag for carrying laptops. The PC comes with a power adapter from the 220 V network, an optical manipulator of the "mouse" type.

Technical specifications:

Operating frequency range for LF input: 9 kHz - 25 MHz
Operating frequency range for HF inputs: 25-6000 MHz
Operating frequency range for microwave inputs: 6000-21000 MHz
Number of identical (same) radio reception channels: 2
Frequency range scanning speed
from 9 kHz to 3000 MHz with a resolution bandwidth of 40 kHz in the mode of:
- asynchronous operation mode of 2 channels
- synchronous operation mode of 2 channels

2200 MHz/s
2000 MHz/s
Operating frequency range scanning speed (from 3000 MHz to 21000 MHz with a resolution bandwidth of 40 kHz
in asynchronous reception mode of at least 2200 MHz/s
Bandwidth (step scanning)

fixed values,
set by the manufacturer
(multiples of 2) from 8 Hz to 40 kHz
Bandwidth of spectral analysis
and I/Q analysis in real
time (time duration
is not limited) 8000 kHz
Type of demodulation signals AM, FM, PalTV, APCO P25, TETRA, DMR

Bandwidth of demodulation is adjustable,
in the range of 100 Hz - 8000 kHz
Sensitivity of each channel
RPU by input in the frequency range
from 30 to 3000 MHz, not worse than -158 dBm/Hz
Dynamic range of each channel
RPU for one signal in the frequency range
from 30 to 3000 MHz (from the noise level (1 Hz)
to the compression point of 1 dB), not worse than More than 120 dB
Dynamic range of each channel
RPU by intermodulation distortion
3rd order 85 dB at a signal-to-noise ratio of 10 dB (±1 dB)
Antenna cable length 20 m
Analysis of wireless Wi-Fi networks: search, registration and analysis of
characteristics of wireless Wi-Fi networks, determination of SSID,
MAC address of the access point, MAC subscriber, geographic
coordinates of the detection location, channel number and level,
direction finding of operating devices using the amplitude
direction finding method.

Analysis of TETRA standard signals:
• determination of the DMO mode with the issuance of Src SSI of the device;
• identification of the base station of the TETRA standard, with the display of
BS operating parameters (MCC, MNC, ColorCode, SystemCode, Level, FreqOffset, SNR, BER).
Analysis of DECT standard signals:
• recording of all base stations and their unique identifiers,
signal levels for each base station (BS DECT);
• recording the number and belonging to the base station
of operating mobile terminals (MS DECT);
• localization of operating BS and MS using the amplitude direction finding method;
• measuring the signal level of each detected BS and MS;
• maintaining a protocol of the communication session between MS and BS;
• maintaining a list of legal (identified) BSs and identifying
newly appeared BSs;
• recording the frequency distribution of BSs and MSs, determining
channel loading;
• checking all standard frequencies of the DECT standard,
with the ability to analyze any added frequencies
for belonging to a given transmission class.

Display of analog TV signals:
• search and display of television signals in the band 30 MHz - 21 GHz;
• checking suspicious signals for belonging to the class of analog television signals.
Analysis of signals in wire lines using a converter
wire lines, bandwidth
400 MHz
Directional pattern
of the broadband antenna in the horizontal plane is close to circular
(in the range up to 3000 MHz)
Directional receiving antenna log-periodic vibrator
4 dBi, 600-6000 MHz
Power supply network 100-250 V, 50 Hz;
autonomous (built-in
battery) - operating time
1 hour.
Dimensions of the main unit 270x240x55 mm
Weight of the main unit 5 kg
Technical characteristics of the control PC, not worse
Type laptop
Installed operating system Win 7
Number of processor cores 2
Processor frequency, MHz 2400 MHz
RAM size 4096 MB
Memory type DDR3
Screen size 14-17 inches
Screen resolution 1920x1080
Screen type widescreen
Video memory size 1024 MB
Hard disk size 500 GB
Optical drive DVD-RW
Built-in network card yes
Max. LAN adapter speed 1000 Mbit/s
Number of USB 2.0 interfaces 2
Battery life hours
Battery type Li-Ion
Technical characteristics of the broadband directional receiving antenna
Type Log-periodic
vibrator antenna
Frequency range 600-6000 MHz
Polarization Horizontal
or vertical
(depending
on installation)
Size 340x200x25 mm
Weight 270 g
Technical characteristics of the broadband antenna
Operating frequency range:
- lower limit
- upper limit
25 MHz
12000 MHz
Directional pattern
in the horizontal plane quasi-isotropic
Overall dimensions (without tripod) 273x135x11 mm
Technical characteristics of the broadband microwave antenna
Operating frequency range 2.0-25 GHz
Input impedance 50 Ohm
Standing wave ratio:
- in the range of 2.0-6.0 GHz
- in the range of 6.0-25 GHz
2
3.5
Polarization vertical
Weight 0.04 kg
Operating temperature range from +5°С to +45°С

The Cassandra-SO complex is supplied with software that allows you to:
• perform round-the-clock radio monitoring with the storage of all measurement results of panoramas and signal spectra in the database without time limits;
• use one of the channels or an additional scanning receiver for audio monitoring of signals without interrupting the scanning process;
• control equipment over the network, including an additional scanning receiver and transmission of a demodulated audio signal over the network;
• perform analysis of the amplitude-frequency-time characteristics of individual signals, a group of signals or the entire radio frequency spectrum in deferred mode (for the entire monitoring period) and in real time;
• present measurement results for analysis in the form of panoramas, signal spectra, spectrograms in 2D and 3D modes;
• use methods of comparison with a reference panorama, methods of difference of panoramas received from different antennas, different channels, use a threshold line (including an adaptive threshold line enveloping the spectra of legal signals), generate lists of signals that have exceeded the threshold and collect statistical data for signals that have exceeded the threshold;
• monitor several frequency ranges or lists of fixed frequencies, generate tasks for performing monitoring, save and load tasks, continue recording in a previously created database of panoramas for the same monitored room;
• monitor a specified frequency range (frequency ranges), save all the results of measurements of signal spectra and frequency range panoramas in the database with reference to each measurement to time and geographic coordinates;
• automatically and manually record a demodulated audio signal and analyze phonogram files;
• perform an automatic study of emissions for belonging to the class of analog television signals; • search for and identify radiation from analog video cameras with a radio channel for data transmission, operating in the PAL, SECAM, NTSC standards, including simple methods of radiation masking (spectrum inversion, inversion of line and frame pulses, etc.);
• perform expert analysis of radio monitoring results after leaving for the monitoring site, store objective radio monitoring data, use reports as an appendix to the conclusion, use data during the next inspection of the site;
• search for, register and analyze service areas of wireless Wi-Fi networks with georeferencing;
• search for, register and analyze the characteristics of wireless Wi-Fi networks, determine the SSID, MAC address of the access point, channel number and level;
• perform other standard functions for studying frequency ranges and measuring signal parameters, documenting work results: graphs of minimums, maximums and average values, marker and cursor measurements, scaling along time and frequency axes, adapting the user interface to the operator, documenting graphic and symbolic information in text and graphic files, Microsoft Word® and Microsoft Excel®, generating various protocols.

The control program performs the following functions:
• generates scanning tasks within the operating frequency range with any number of sub-ranges with their own scanning parameters in each, while the complex can operate in both synchronous and asynchronous modes;
• displays spectrograms - a representation of the obtained panoramas in time (the signal level is displayed in color) in two-dimensional (2D) and three-dimensional (3D) images without recording time restrictions;
• promptly changes and customizes the type of graphic representation within a wide range;
• saves all work results and allows for deferred analysis of work results;
• loads previously saved tasks and continues recording to a previously saved panorama database;
• saves a reference panorama and compares current panoramas with it;
• uses the panorama difference method using a reference panorama;
• uses the panorama difference method using spaced antennas;
• uses a controlled threshold line and displays a list of signals that have exceeded the threshold;
• uses a spectrum analyzer to analyze individual signals in real time;
• records a demodulated audio signal phonogram, analyzes and edits recorded phonograms;
• records a demodulated audio signal automatically when the signal exceeds the threshold line, including transmitting it over a computer network and recording during remote control of the complex;
• performs additional analysis of the list of detected signals (numeric and graphical), generates reports on the studied frequency ranges and detected signals;
• records signal quadratures (I/Q) in a band of up to 8 MHz in wav format;
• performs measurements according to a previously created task;
• saves the measurement results in the panorama database and continues recording in the previously created panorama database;
• uses a frequency assignment database;
• uses a navigation receiver and a geographic information system;
• uses a reference panorama for the panorama difference method;
• displays graphs of maximum, minimum and average values ​​of panoramas;
• uses threshold line schemes and generates a list of signals that have exceeded the threshold line;
• uses a frequency assignment database and displays information on legal sources of radiation on a graph;
• prepares reports on measurement results;
• saves and loads tasks;
• continues recording measurement results in the existing panorama database;
• performs measurements of radiotechnical parameters of radiation according to the spectrum graph in real time;
• performs synchronous analysis of individual signals and frequency sub-ranges (up to 4 simultaneously);
• allows simultaneous presentation of measurement results in the form of amplitude-frequency, amplitude-time graphs and display of measurement points on an electronic map of the area;
• allows displaying measurement results on an electronic map in different colors (different symbols) proportional to the level of signal field strength;
• documents the fact of the presence of signals in the radio air with reference to the time and duration of operation of radio emission sources;
• perform marker and cursor measurements.

Delivery set:
1. Main unit with a two-channel radio receiver - 1 pc.
2. Control PC complete with a power adapter, an optical mouse-type manipulator, a carrying bag - 1 pc.
3. Test signal simulator - 1 pc.
4. Wire line converter - 1 pc.
5. Broadband non-directional antenna with a tripod-clamp - 2 pcs.
6. Broadband directional antenna - 1 pc.
7. High-frequency cable 20 m long - 2 pcs.
8. SMA-N-type radio frequency adapter - 2 pcs.
9. Carrying bag - 1 pc.
10. Control cable (6th category LAN) - 1 pc.
11. Power adapter - 1 pc.
12. Microwave antenna - 2 pcs.
13. Wi-Fi receiving module - 1 set.
14. Special software package (1 set):
• RadioInspectorRT with option, DTest;
• RadioInspectorRP;
• RadioInspector Wi-Fi;
15. Set of operational technical documentation (form, passport, technical description, user manual) - 1 set.