Selective transistor microvoltmeter STV 301-2
Also, this device can be called: STV301-2, STV-301-2, STV 301 2, STV3012, STV 3O1-2.
STV 301-2 selective microvoltmeter - sensitive heterodyne receiver with access to a pointer instrument and headphones. STV 301-2 used to measure high voltages and useful radio (pulse sequences are evaluated by subjective perception of hearing).
Specifications STV 301-2:
Frequency range - 0,15 MHz to 30 MHz.
Intermediate frequency - 110 kHz; 1,7 MHz.
Error of frequency at ambient temperature:
- From -5° C to +50° C - no less than 3%;
- From -30° C to - 5° C - less than 5%.
The bandwidth of single signal - to 5 MHz.
- With respect to 1 mV - from -3,7 dB to 90 dB (0,65 mV to 30 mV);
- With a removable divider 20 dB - from 16,3 dB to 110 dB (6,5 mV to 300 mV).
Quasi-peak measurement of pulse voltage noise for the repetition frequency of 100 Hz:
- With respect to 1 mV - from -3,7 dB to 80 dB (0,65 mV to 10 mV);
- With a removable divider 20 dB DGF / dB 8 - from 16,3 dB to 100 dB (6,5 mV to 100 mV).
- Norm - from 0 dB to 90 dB;
- With a removable divider 20 dB DGF/8 dB - 20 dB to 110 dB.
Input impedance microvoltmeter STV 301-2 - from 60 Ohm to 90 Ohm.
- Sinusoidal voltages - from -16 dB to +4 dB;
- Switching voltage - from -10 dB to +4 dB.
Impulse response frequencies, respectively:
- 10 Hz - (-10±2,5 dB);
- 20 Hz - (-6,5±2 dB);
- 100 Hz - 0 dB;
- 1000 Hz - 4,5±1,5 dB.
Measurement error sinusoidal voltages - ±4 dB (optional - not more than 0,3 mV).
Maximum input voltage STV 301-2:
- Permanent - 63 V;
- Variable (with frequency - 400 Hz) - 42 V.
- Norm - 9 kHz±1 kHz;
- 6 dB - 3 kHz.
Clarifier for selectivity 60 dB - not less than 25 kHz.
Stability with respect to undesired displacements results (weakening points spurious reception channels) - not less than 30 dB.
- Intermediate frequency - not less than 30 dB;
- Mirror channel - not less than 20 dB.
Shielding effectiveness STV 301-2 - not less than 20 dB.
Calibration voltage pulse generator using the built throughout the frequency range.
Low frequency output for headset - 4 Ohm.
Connection for additional devices - 12 V, max. 5 mA to the front panel.
Input - RF connector hulled 75-0-f1.
Mass - 7 kg.
Dimensions - 360x130x320 mm.
Operating conditions STV 301-2:
- From - 220 V;
- Battery - 12±1 V.
Power consumption - 5 V·A.
Current consumption - from 40 mA to 75 mA.
The manufacturer provides a guarantee of compliance selective microvoltmeter STV 301-2 all the technical requirements if the consumer terms and conditions of use, storage and transportation, installed documentation manuals.
Photos: STV 301-2
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Built-in printer and a keyboard, memory, transfer data to a computer
Wheatstone bridge, resistance box measure, the resistance coils:
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