Testing equipment for determining the parameters of heat radiation receivers

Conclusions

The equipment for determining the parameters of receivers makes it possible to select the optimum operating conditions for bolometers, i.e. to find the values of the operating current and frequency which correspond to the receiver's minimum threshold sensitivity. The use of a vibration-type modulator fed from an audio oscillator provides rapid measurements of receiver parameters in the basic range of 3–70 cps. The utilization of a phase detector in the measuring device provides a uniform bandwidth over the whole operating frequency range. The evaluation of the transfer constant under working conditions for each receiver connected to a transformer does not require additional time, but it raises the reliability of measurements.