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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.

  
The coordinate oscilloscope mode (dynamic characteriograph) is activated by the button Y2 (Y1) On/Off or key X.
  Real devices with an additional input are used for comparison of frequencies and phases of signals. You can do simple experiences with phase-shifting C or L, as shown in figure, or to connect with generator, having established different frequencies on channels (about the generator you can see here).

The circuit U1-U2 (U1) for C= 0,33 mcF at f=1,5 kHz U1-U2 (U1) for stabilizer on 3,3V

  It’s interested to capture the characteristics of the nonlinear components - various diodes, termoresistors etc. Set the switch S1 (see circuit of the external device fig. 1) in the position Osc, connect the switch S2. Activate the1 channel of the generator, establish the maximal sine wave voltage to avoid distortions - flat tops (see by scope).
  There are options of the representation of four kinds of the dependence for the characteriograph. The coordinate axes are marked and numbered in true voltage or current, if the calibration is made and also the size of resistance R4 is precisely established.