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The voltmeter is capable of working both independently and as part of automated measuring systems with interfaces such as USB, RS-232, IEEE-488 (CPC). Technical specifications Measuring ranges of electrical quantities: - constant electrical voltage from 3 MV to 1000 V - SCR of alternating electric voltage in the frequency range from 10 Hz to 1 MHz (AC) from 10 MV to 1000 V - RF RF AC voltage in the frequency range from 10 Hz to 2000 MHz (RF) from 10 mV to 100 V - frequency of the measured AC voltage from 10 Hz to 1 MHz Measurement errors of electrical quantities: - constant electrical voltage ± (0.0021 - 17)% - SCR of alternating electric voltage in the frequency range from 10 Hz to 10 MHz (AC) ± (0.017 - 21)% - RF RF AC voltage in the frequency range from 10 Hz to 2000 MHz (RF) ± (0.21 - 16)% - frequency of the measured alternating electric voltage ± (0.1 -10.1)% General characteristics: Operating temperature range from 5 to 40 °C AC power supply 220 V, 50 Hz Power consumption, no more than 50 VA Overall dimensions, mm 489x91x381 Weight, not more than 8.5 kg

Basic properties: Wide frequency range; Sufficiently large output power; High level of suppression of side harmonics of the input signal; Low phase noise value; Relatively simple technical solutions: - synchronization and frequency stabilization, - stabilization and adjustment of the output power level, - implementation of amplitude and frequency modulation modes; Do not require external bias diodes. Operating conditions: Operating temperature range from minus 10 to 50 ° C; The relative humidity of the air is up to 98% at a temperature of 25 ° C. Technical characteristics Input/output frequency range, GHz 26,78-39,17 / 53,57-78,33 Losses (max.), dB 15 Input power level, dBm 15-21 Unevenness of output power (Rvh. = 20 dBm), dB ± 2.0 The level of parasitic harmonics of the input signal at the output (min.), dBn 20 Output VSWR (max.) 2.0 Connector type: • Input Coax. 2.4/1.0 mm (plug/socket) • Output Waveguide 3,759x1,88 mm (50-75GGo) Overall dimensions, mm 26x20x20 Weight, g 50

The device successfully combines simplicity of design, modern design, convenience, clarity of control and obtaining information about the measured physical quantity. Technical specifications Frequency and period of sinusoidal signals (inputs A, B) 0.001 Hz - 300 MHz Frequency and period of video pulse signals (inputs A, B) 0.001 Hz - 300 MHz Frequency of continuous sinusoidal oscillations (input C) (0.3 – 37.5) GHz Carrier frequency of a continuous radio pulse sequence (IM) signal (input C) Fn = (0.3-37.5) GHz, from 0.3 microseconds to 1ms, Fsl from 100 Hz to 1 MHz, from 2 to 103 Frequency ratio (inputs A, B) from 1 to 3x109 Pulse duration 5 ns - 1000 s The duration of the front, the decay of the pulses is 5 ns - 100 microseconds Time interval from -1000 to 1000 s Phase difference of two synchronous sinusoidal signals from minus 180° to 180° The measurement error of the phase difference of two synchronous sinusoidal signals is ± 2.3 ° at a signal amplitude of 1 V Setting range of trigger levels (inputs A, B) from - 2.0 to 2.0 V The error of setting the trigger levels (inputs A, B) ± 0.01 V Input signal level: •for sinusoidal signal (inputs A, B) (0.03 - 10.0) V •for video pulse signal (inputs A, B) (0.1 - 10.0) V •for a sinusoidal signal (input C) 0.1 - 5 MW Input resistance •Inputs A, B (50±2.5) ohms; (1±0.1) MOm/100 pF •Input With (50±2.5) ohms Nominal frequency value of the reference quartz oscillator 10 MHz Relative error in the frequency of the quartz oscillator, no more than ± 2x10-7 in 24 months Operating temperature range from minus 10 to 50 °C AC power supply 220 V, 50 Hz Power consumption, not more than 100 VA Overall dimensions, mm 306x129.5x430.6 Weight, not more than 8.5 kg

The device replaces the devices for checking the attenuators D1-13A and D1-25. D1-29 is a step attenuator with a range of attenuation from 0 to 110 dB with a step of 10 dB, operating in the frequency range from 0 to 150 MHz. The device consists of a housing with damping cells and a switch with a counting device. The housing contains coaxial input and output connectors, as well as additional connectors "40 dB" and "80 dB", necessary for the verification of the device. Technical specifications Operating frequency range 0 – 150 MHz Difference attenuation setting range (after 10 dB) 0 – 110 dB Input electrical resistance to direct current 50 ± 0.1 ohms The output electrical resistance to direct current when connected to the load input is 50 ± 0.1 ohms 25 ± 0.1 ohms The main absolute error of the difference attenuation setting relative to the 0 dB mark at direct current ± (0.002 - 0.02) dB The main absolute error of the difference attenuation setting relative to the 10 dB mark in the frequency range up to 30 MHz ± (0.004 - 0.9) dB The main absolute error of the difference attenuation setting relative to the 10 dB mark in the frequency range over 30 to 150 MHz ± (0.09 - 3.0) dB The maximum permissible value of the electrical voltage (DC or AC) at the input of the attenuator 3 In the operating temperature range from 5 to 40 ° C Overall dimensions, mm 149x95x149 Weight, not more than 3 kg

The generator is capable of operating both autonomously and as part of automated measuring systems with USB and IEEE-488 (CPC) interfaces. Technical specifications Frequency range from 5 to 17.85 GHz Frequency tuning discreteness 0.001 Hz The main error of the frequency setting is ± 3x10-7 Hz The range of setting the output signal power level at the main output is from minus 110 to 13 dBm The basic error of setting the reference power level is ± 1.0 dB Instability of the output signal power level for any 15-minute time interval of no more than 0.1 dB Metrological characteristics of the generator in the FM operation mode: - frequency range of the modulating signal: low frequency from 1 Hz to 20 kHz RFM from 10 to 100 kHz - frequency deviation setting range (taking into account the carrier frequency value): low frequency from 1 Hz to 100 kHz RFM from 50 to 10000 kHz - the main error of the frequency deviation setting is ± (3 – 18)% Metrological characteristics of the generator in AM operation mode: - frequency range of the modulating signal from 0.05 to 5.0 kHz - the range of setting the amplitude modulation coefficient from 1 to 50 % - the main error in setting the amplitude modulation coefficient: Internal ± (0.15M + 0.2)% External ± (0.20M + 0.5)% Metrological characteristics of the generator in the IM operation mode: - the duration range of modulating pulses from 100 ns to 20 s - the range of the modulating pulse repetition period from 140 ns to 30 s - the difference in the duration of the output RF pulses from the duration of the modulating pulses ± 100 ns Operating temperature range from minus 10 to 40 °C AC power supply 220 V, 50 Hz Power consumption, no more than 150 VA Overall dimensions, mm 498x136x487 Weight, not more than 15 kg

NanoEducator II, despite its compactness and ease of operation, supports all basic techniques of atomic force and scanning tunneling microscopy, so it can be used for any routine AFM and STM measurements and experiments in scientific research. Here are the results of some experiments in various scientific applications: Study of atomic structures Study of metallic nanostructures Study of magnetic structures Study of polymer objects Study of biological objects Study of carbon nanomaterials

The generator is capable of operating both independently and as part of automated measuring systems with USB and IEEE-488 (CPC) interfaces. Technical specifications Frequency range from 9 kHz to 6 GHz Frequency tuning discreteness of 1 Hz The main error of the frequency setting is ± 3x10-7 Hz The range of setting the output signal power level at the main output is from minus 10 to 13 dBm The basic error of setting the reference power level is ± (0.5 – 1.0) dB Instability of the output signal power level for any 15-minute time interval of no more than 0.1 dB Metrological characteristics of the generator in the FM operation mode: - frequency range of the modulating signal from 1 to 100 kHz - frequency deviation setting range (taking into account the carrier frequency value) from 12.5 to 4000 kHz - the main error of the frequency deviation setting is ± (20 – 25)% Metrological characteristics of the generator in AM operation mode: - frequency range of the modulating signal from 0.05 to 5.0 kHz - the range of setting the amplitude modulation coefficient from 1 to 100 % - the basic error of setting the amplitude modulation coefficient ± (0.25 M + 0.2)% Metrological characteristics of the generator in the IM operation mode: - the duration range of modulating pulses from 300 ns to 20 s - the range of the modulating pulse repetition period from 340 ns to 30 s - the difference in the duration of the output RF pulses from the duration of the modulating pulses ± 200 ns Operating temperature range from minus 10 to 40 °C AC power supply 220 V, 50 Hz Power consumption, not more than 100 VA Overall dimensions, mm 498x136x487 Weight, not more than 13 kg

The voltmeter is capable of operating both independently and as part of automated measuring systems with RS-232 type interfaces. Technical specifications Ranges of measurement of electrical quantities: - constant electrical voltage from 10 MV to 1000 V - SCR of alternating electric voltage in the frequency range from 10 Hz to 10 MHz (AC) from 1 mV to 750 V - DC current from 0.1 µA to 20 A - SCR of alternating electric current in the frequency range from 10 Hz to 5 kHz from 10 µA to 20 A - electrical resistance from 10 mOhm to 1 GOm - frequency of the measured alternating electric voltage from 10 Hz to 1 MHz Measurement errors of electrical quantities: - constant electrical voltage ± (0.0028 - 20)% - SCR of alternating electric voltage in the frequency range from 10 Hz to 10 MHz (AC) ± (0.09 - 15)% - DC power ± (0.012 - 20)% - SCR of alternating electric current in the frequency range from 10 Hz to 5 kHz ± (0.11 - 2.35) % - electrical resistance ± (0.007 - 5.5)% - frequency of the measured alternating electric voltage ± (0.1 -10.1)% General characteristics: Operating temperature range from 5 to 40 °C AC power supply 220 V, 50 Hz Power consumption, no more than 20 VA Overall dimensions, mm 291x110x308 Weight, not more than 4.5 kg

Created on the basis of the G4-230 generator. Remote frequency converters extend the frequency ranges up to 53.57 GHz (G4-235) and up to 78.33 GHz (G4-236). The generators are capable of operating both independently and as part of automated measuring systems with USB and IEEE-488 (CPC) interfaces. Technical specifications The frequency range at the output of the base unit is from 5 to 20 GHz Frequency range at the output of the frequency converter (G4-235) from 37.5 to 53.57 GHz The frequency range at the output of the frequency converter (G4-236) is from 53.57 to 78.33 GHz Frequency tuning discreteness 0.001 Hz The main error of the frequency setting is ± 3x10-7 Hz The range of setting the signal power level at the output of the base unit is from minus 110 to 13 dBm The range of setting the signal power level at the output of the frequency converter (G4-235) is from 0 to 13 dBm The range of setting the signal power level at the output of the frequency converter (G4-236) from 0 to 10 dBm The basic error of setting the reference power level is ± (1.0 – 2.5) dB Metrological characteristics of the generator in FM operation mode: - frequency range of the modulating signal from 1 Hz to 20 kHz - frequency deviation setting range (taking into account the carrier frequency value) from 1 Hz to 200 kHz - the main error of the frequency deviation setting is ± (5 – 18)% Metrological characteristics of the generator in AM operation mode: - frequency range of the modulating signal from 0.05 to 5.0 kHz - the range of setting the amplitude modulation coefficient from 1 to 50 % - the basic error of setting the amplitude modulation coefficient ± (0.15 M + 0.2)% Metrological characteristics of the generator in the IM operation mode: - the duration range of modulating pulses from 100 ns to 20 s - the range of the modulating pulse repetition period from 140 ns to 30 s - the difference in the duration of the output RF pulses from the duration of the modulating pulses ± 100 ns Operating temperature range from 5°C to 40 °C AC power supply 220 V, 50 Hz Power consumption, no more than 150 VA Overall dimensions, mm 498x136x487 Weight, not more than 20 kg

Regulated switching power supplies with highly stable output characteristics Digital display of set and actual value, voltage and current (4 digits, LED) Electronic load switching on/off Protection against overload, short circuit, overheating and reverse polarity Low ripple output voltage less than 2mV Low ripple output current less than 5mA Minimum discreteness of setting output voltage and current 0.007/0.005 Operating modes: stabilization U and I, dynamic load RS-232 interface

The B5-83 DC power supply is designed to provide constant voltage and current to devices and equipment during the development, production, operation and repair of electronic devices. - Allows harsh operating conditions - Wide range of currents and voltages at a maximum power of 200 watts Technical specifications Output voltage setting range from 3 to 300 V Output current setting range from 0.05 to 2 A Electrical output power, not more than 200 watts The main error of the output voltage setting is ± 2 V The main error of setting the output current is ± 0.02 A Additional error in setting the output voltage caused by a deviation of the mains voltage from the nominal value by ± 10% ± (0.0001 · Uust + 3 mV) Additional error in setting the output voltage caused by a change in the load current from 0.9 of the maximum value to zero ± (0.0002 · Uust + 10 mV) Additional error in setting the output current caused by a deviation of the mains voltage from the nominal value by ± 10% ± (0.0002 · Iust + 1 mA) Additional error in setting the output current caused by a change in the load voltage from 0.9 of the maximum value to zero ± (0.0005 · Iust + 2 mA) The change in the output voltage in the voltage stabilization mode with a deviation of the ambient temperature in the operating temperature range by ± 10 ° C, not more than ± 250 mV Change of the output current in the current stabilization mode with a deviation of the ambient temperature in the operating temperature range by ± 10 ° C, not more than ± 10 mA Operating temperature range from minus 10 to 50 °C AC power supply 220 V, 50 Hz Power consumption, no more than 350 VA Overall dimensions, mm 240x128x313 Weight, not more than 5.5 kg

Basic properties: Wide frequency range; Sufficiently large output power; High level of suppression of side harmonics of the input signal; Low phase noise value; Relatively simple technical solutions: - synchronization and frequency stabilization, - stabilization and adjustment of the output power level, - implementation of amplitude and frequency modulation modes; Do not require external bias diodes. Operating conditions: Operating temperature range from minus 10 to 50 °C; The relative humidity of the air is up to 98% at a temperature of 25 ° C. Technical characteristics Input/output frequency range, GHz 12,50- 17,86 / 37,50- 53,57 Losses (max.), dB 17 Input power level, 15-20 dBm Unevenness of output power (Rvh. = 20 dBm), dB ± 2.0 The level of parasitic harmonics of the input signal at the output (min.), dBn 20 Output VSWR (max.) 2.0 Connector type: • Input Coax. 3.5/1.5 mm (socket) • Output Waveguide 5,2x2,6 mm Overall dimensions, mm 34x20x20 Weight, g 60