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Ya5Kh-268

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    The noise signal generator Ya5Kh-268 (Ya5Kh 268; Ya5Kh268; Ya5Kh/268)
    
Noise generator 
Ya5Kh-268 - test oscillator, the output of which is the realization of a random process with controlled statistical properties.
 
    
Generators 
Ya5Kh-268 is used in the measurement of the maximum sensitivity of the amplifier noise figure radios, noise studies of various electronic, automated and electronic systems or individual components. Also Ya5Kh-268 is used when removing the frequency characteristics of the electro-acoustic devices, calibration of instruments for measuring the probability characteristics of random processes, etc.
 

    Structural features Ya5Kh-268

    The main unit of the circuit noise generator Ya5Kh-268 is an oscillator. Its signals have uniform power spectral density across the desired bandwidth.
    
As a model for the source of the noise generator 
Ya5Kh-268 is a hot wire resistor, the effective voltage which is calculated by the formula:

U2 = 4kTRΔfe,


    where - k = 1,38 × 10-23Dzh/grad;
    
- T - absolute temperature in degrees Kelvin resistor;
    
- R - resistance of the resistor in ohms;
    
- Δfe - bandwidth in Hz.
 
    
Structurally resistor 
Ya5Kh-268 generator is performed in a tungsten coil wrapped around the ceramic frame, which temperature is maintained constant.
    
The sources of thermal noise power is true bolometric generator. Bolometer generators 
Ya5Kh-268 is a vacuum glass bulb, inside which a tungsten filament is stretched.
    
The main element of the output of the generator device
Ya5Kh-268is calibrated attenuator that provides equal power split ratio over the entire bandwidth of noise. To control the output power level of the oscillator circuit Ya5Kh-268 is built rms voltmeter.

Photos: Ya5Kh-268

Ya5Kh-268 generator image.
Ya5Kh-268 generator image.
Ya5Kh-268 generator image.
Ya5Kh-268 generator image.
Ya5Kh-268 side view №1.
Ya5Kh-268 side view №1.
Ya5Kh-268 side view №2.
Ya5Kh-268 side view №2.
Ya5Kh-268 side view №3.
Ya5Kh-268 side view №3.
Ya5Kh-268 side view №4.
Ya5Kh-268 side view №4.
Ya5Kh-268 overhead view.
Ya5Kh-268 overhead view.
Ya5Kh-268 bottom view.
Ya5Kh-268 bottom view.


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