Чтобы поменять язык интерфейса программы, нажмите кнопку с синим кружком рядом с эмблемой РМ. затем выйдите из программы, и войдите в нее снова.

Oscilloscope. The general information.
Switching of inputs.
The circuit of the external device. Calibration.
The analysis of a spectrum.
Two-coordinate mode (dynamic characteriograph).
The generator.         Additional adjustment.
The Capacity - meter.
The Voltage - Frequency Caracteriograph.

  
To switch to the mode of the spectrum analyzer you should press a Spectrum On/Off or key Z.
   In the bottom part of the form there is a bar with control bodies of the analyzer. You can move the right and left limits of spectrogram within the limits of an initial frequency range, which lays between 0 and half of input sampling frequency. Vertical scale of spectrogram can be changed by keys with vertical arrows.
 
 Do not connect an input of the device to mains 220..230V even through the large resistance or auto transformer. At the best you will lose the computer