×òîáû ïîìåíÿòü ÿçûê èíòåðôåéñà ïðîãðàììû, íàæìèòå êíîïêó ñ ñèíèì êðóæêîì ðÿäîì ñ ýìáëåìîé ÐÌ. çàòåì âûéäèòå èç ïðîãðàììû, è âîéäèòå â íåå ñíîâà.

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. 

        Switch off the speakers !
       
The built - in virtual Capacity - meter allows to estimate electrical capacity in limits from several pF up to 50 mkF. The device shows the measured value of capacity, the nearest value from a standard line for condensers, and also intermediate results used at account. The device automatically chooses range, establishing the optimum frequency of the generator. C - meter is convenient for sorting and selection of condensers. In updatings can be used in other purposes, for example with capacitor gauges at measurement of not electrical sizes, for detection of breakages in cables.
        The principle of capacity measurement is illustrated by the circuit and formula placed below.
        From an output of Sound Card the sine wave acts on a chain consisting of the examinee condenser Cx and the resistor R. The Sound Card inputs are connected for the measurement of voltage: V1 - total, V2 - on the resistor R. The voltage U2 at known value R is the information about a current through a chain.

Put any condenser Cx, and you will see on the screen of the scope shift of phases between a total voltage and current through the chain..

The method, realized in C- meter, thus, can be defined as the method of the ammeter - voltmeter for a complex circuit.
       
Remember: a capacity of your body influences result of the measurement, therefore remove your hands after the connection of the condenser.
       
The establishing of the size R (R3 ') in the program is carried out as follows. Press the R3' button on the form of C - meter, type value, kOm, then press Enter. At the definition of R value is desirable to take into account ADC entrance resistance. For example, if it is 12 kOm, with R =1,5 kOm you should establish 12*1,5 / (12+1,5) =1,33 kOm.
        At the first activation of C - meter the message "Change the input " can appear. Then at the presence of the window of C - meter press the button
Mixer. On its form specify a Line input. It is necessary for making it once, so that the program "has remembered" that input as necessary to use with C - meter and specified it, if you switched inputs. And the last adjustment. Disconnect any Cx, press the button 0. The program "will remember" an initial capacity of connected wires and jacks, and will subtract it from the current results.
       
Recommended oscilloscope input sampling frequency for C - meter function is 48 or 44,1 kHz. It is possible to establish more frequency at the measurement of small values of the capacity.
        Do not switch needlessly the display speed (panel
X). At the start of C - meter the minimal speed is established. For its work is necessary, that the reception buffer (the scope screen) contained some periods of a signal, including on the lowest frequencies of the measurement (5 Hz).
        The generator output voltage depends on a position of the main volume regulator (on the Windows tasks panel ). If it is unsufficient for work of the C - meter, the message
Volume? will appear, so you should add the volume. Also it is possible to restore positions of all regulators pressing button Mixer, then Restore.
        C - meter
claims the high requirements to Sound Card and its driver. The card should support the full duplex stereo mode. It is preferable to work under Win XP, 2000, NT. With Win 98 program is efficient, but requires more resources of the system.