The network noise generator "LGSh-221" is designed to be used to protect information containing state secrets and other information with limited access, processed by technical means and systems, from leakage due to interference by generating masking noise-like interference. The "LGSh-221" product corresponds to type "B" - means of active protection of information from leakage due to interference of an information signal on conductors, including on grounding and power supply circuits, conductive lines and engineering and technical communications that go beyond the controlled zone.
The "LGSh-221" product complies with the requirements of the document "Requirements for means of active protection of information from leakage due to side electromagnetic radiation and interference" (FSTEC of Russia, 2014) - according to protection class 2. The LGSh-221 product is equipped with a visual system for indicating normal operation and a visual and sound system for indicating emergency operation (failure). The LGSh-221 product is equipped with a time-of-use counter that records and displays in hours and minutes the total time of operation of the Product in the masking interference generation mode. The design of the LGSh-221 Product ensures protection of the output noise signal level adjustment organs from unauthorized changes and detection of unauthorized access to them. The LGSh-221 product has the ability to connect a wired remote control and monitoring system, which can be the software and hardware complex "Web".
Spectral density of the noise signal voltage of the LGSh-221 Product in the frequency range of 10-1000 kHz is not less than 30 dB (μV/√kHz) Spectral density of the noise signal voltage of the LGSh-221 Product in the frequency range of 1-30 MHz is not less than 35 dB (μV/√kHz) Spectral density of the noise signal voltage of the LGSh-221 Product in the frequency range of 30-400 MHz is not less than 10 dB (μV/√kHz) Output noise signal level adjustment range is not less than 20 dB Power consumed from the network is not more than 45 VA Overall dimensions of the LGSh-221 Product are not more than 188x160x60 mm Weight of the LGSh-221 Product is not more than 1.5 kg Supply voltage (single-phase AC network) 187 V-242 V Operating mode 24 hours Ambient air temperature from 1 to 40 °C Relative air humidity no more than 80% at 25 °C Atmospheric pressure 630–800 mm Hg Mean time between failures not less than 6,000 h Average service life 7 years Product resource "LGSh-221" not less than 27,000 h