Category: OSCILLOSCOPE

Probes for CRO

Probes for CRO-Direct Probes (1 : 1): Probes for CRO – The simplest types of probe (one can hardly call it a probe) is the test lead. Test leads are simply convenient lengths of wire for connecting the CRO input to the point of observation. At the CRO end, they usually terminate with lugs, banana tips […]

Oscilloscope as a Bridge Null Detector

Oscilloscope as a Bridge Null Detector: Oscilloscope as a Bridge Null Detector – As a null detector for an ac bridge, the oscilloscope, unlike a meter used for the purpose, gives separate indications for reactive and resistive balances of the bridge. Figure 7.40 shows how an oscilloscope is connected to the bridge. Here T is […]

Basic Measurement of Capacitance and Inductance

Basic Measurement of Capacitance and Inductance: Basic Measurement of Capacitance and Inductance – Capacitance may be measured from a capacitor discharge curve. This requires a dc oscilloscope with a triggered single sweep that is of the storage type. Figure 7.38 (a) shows the test setup. C is the capacitor under test, and E is 1.5 […]

Checking of Diodes

Checking of Diodes: Checking of Diodes -The voltage-current characteristics curve of a crystal diode may be observed using the circuit given in Fig. 7.37 (a). In this case the internal sweep is not used. Horizonal deflection is obtained by connecting the 6.3 V source directly to the horizontal input and switching the sweep control to […]

Gear Wheel Method

Gear Wheel Method: Gear Wheel Method – When a Lissajous figure contains a large number of loops, accurate counting becomes difficult. Figure 7.35 shows a test method that uses a modulated ring pattern in place of the looped figure and permits a higher count. This pattern is also called a Gear wheel or toothed wheel, […]

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