Basic generator of masking radio interference GSh-111

The basic generator GSh-111 has two independent channels for generating masking interference with a digital multi-frequency equalizer for adjusting the levels of the electromagnetic field and electrical noise signals. The generator is made according to a patented scheme of a "thermal" noise signal generator with a continuous and uniform spectrum, which ensures a high noise quality factor in a wide frequency band.

Electromagnetic compatibility with civilian radio-electronic equipment is achieved by smooth adjustments of the masking noise by a multi-band frequency equalizer in eight sub-ranges to levels that do not exceed those permitted by the State Commission for Radio Frequencies and Sanitary Rules and Regulations, when installed in a protected room.
The housing of the GSh-111 generator is made of metal and contains:
- a motherboard with elements and connectors placed on it for connecting modules and external devices that form functionally complete GSh units.
- a channel for generating an electromagnetic noise signal with outputs for connecting radiating antennas (outputs "A" and "MA").
- channel for generating electrical noise voltages with an output for connecting devices to conductive lines (output "B").
- digital multi-frequency equalizer for each channel.
- a system for monitoring the parameters of the generator based on a microprocessor with non-volatile memory and protection from unauthorized access.
- a counter for recording operating time.
- an automatic system for self-diagnostics and direct monitoring of the levels of the electromagnetic field of emitted noise through the antenna input "K"
- an interface for managing and monitoring the generator via an Ethernet network 10/100 Mbit/s;
- a control and indication system (film keyboard, LCD indicator and LEDs).
- a generator power module + 12V / 1.5 A with a device for inducing a signal to the power supply and grounding circuits NS-111.

On the rear panel of the generator there are separate outputs for connecting magnetic and radio frequency antennas, as well as an output to an external device for inducing a noise signal to the wires.

Specifications:
Generated noise signal range 10 kHz – 1.8 GHz
Noise quality factor no less than 0.9
Magnetic antenna output terminal block: 0.01 - 30 MHz
RF antenna output SMA connector: 0.01 – 1800 MHz
Inductor connection output terminal block, network plug: 0.01 - 400 MHz
Noise level adjustment depth from 0 to - 30 dB
Sub-range intervals for noise level adjustment at output "A" 0.01–30, 30-140, 140-400, 400-800, 800-1200, 1200-1800 MHz
Sub-range intervals for noise level adjustment at output "B" 0.01-1, 1-30, 30-140, 140-400 MHz
Built-in LCD screen size 62x18 mm
Indication of normal operation mode LED and text
Indication of emergency mode LED, text and sound (buzzer)
Control from the panel, wired remote control, via Ethernet 10/100 Mbit
Generator power supply network 220 V 50 Hz or via an external DC adapter 12 V 2A
Dimensions of the generator unit 225x150x75 mm