The slope and level detector circuit in a CRO has a delay of 100 ns. The start-stop sweep generator has a response time of 50 ns. In order to display correctly, a delay line of  

A stationary closed Lissajous pattern on an oscilloscope has 3 horizontal tangencies and 2 vertical tangencies for a horizontal input with frequency 3 kHz. The frequency of the vertical input is 

In an oscilloscope screen, linear sweep is applied at the

The two signals S1 and S2, shown in figure, are applied to Y and X deflection plates of an oscilloscope.  

The waveform displayed on the screen is

A dual trace oscilloscope is set to operate in the alternate mode. The control input of the multiplexer used in the y-circuit is fed with a signal having a frequency equal to

The two inputs of a CRO are fed with two stationary periodic signals. In the X-Y mode, the screen shows a figure which changes from ellipse to circle and back to ellipse with its major axis changing orientation slowly and repeatedly. The following inference can be made from this.

Two sinusoidal signals  and  are applied to X and Y inputs of a dual channel CRO. The Lissajous figure displayed on the screen is shown below:

The signal  will be expressed as  

The probes of a non-isolated, two-channel oscilloscope are clipped to points A. B and C in the circuit of the adjacent figure Vin is a square wave of a suitable low frequency. The display on Ch1 and Ch2 are as shown on the right.  Then the “Signal” and “Ground” probes S1, G1 and S2, G2 of Ch1 and Ch2 respectively are connected to points

The time/div and voltage/div axes of an oscilloscope have been erased. A student connects a 1 kHz, 5V p-p square wave calibration pulse to channel 1 of the scope and observes the screen to be as shown in the upper trace of the figure. An unknown signal is connected to channel 2 (lower trace) of the scope.  If the time/div and V/div on both channels are the same, the amplitude (p-p) and period of the unknown signal are respectively

The simultaneous application of signals x(t) and y (t) to the horizontal and vertical plates, respectively, of an oscilloscope, produces a vertical figure-of - 8 display. If P and Q are constants, and x(t)=P sin(4t+30) , then y (t) is equal to

A CRO probe has an impedance of 500 kΩ in parallel with a capacitance of 10pF.  The probe is used to measure the voltage between P and Q as shown in figure.  The measured voltage will be

Group II represents the figures obtained on a CRO screen when the voltage signals  and  are given to its X and Y plates respectively and Φ is changed. Choose the correct value of Φ from Group I to match with the corresponding figure of Group II         

Group I

P.   Φ = 0          Q.  Φ =

R.         S.

Group II

Two in-phase 50 Hz sinusoidal waveform of unit amplitude are fed into channel 1 and channel 2 respectively of an oscilloscope. Assuming that the voltage scale, time scale and other settings are exactly the same for both the channels, what would be observed if the oscilloscope is operated in X-Y mode?

Fig shows the electrostatic vertical deflection system of CRT. Given that  is the accelerating voltage, the deflection sensitivity (deflection/volt) is proportional to:

In an oscilloscope, the input to the horizontal plates is a 100 Hz voltage signal. The Lissajous patterns (A), (B) and (C) will be generated when different frequency voltage signals are applied to vertical plates. Match each Lissajous pattern to the corresponding frequency .

A certain oscilloscope with 4 cm by 4 cm screen has its own sweep output fed to its input. If the x and y sensitivities are same, the oscilloscope will display a  

An oscilloscope is operated in the X-Y mode. The figure 8 is displayed on the oscilloscope screen. If the frequency of the X-input is 1 kHz, the Y-input frequency is _____________________.

A Lissajous pattern, as shown in figure, is observed on the screen of a CRO when voltages of frequencies  are applied to the x and y plates respectively.  is then equal to

A CRO screen has ten divisions on the horizontal scale. If a voltage signal  is examined with a line base setting of 5msec/div, the number of cycles of signal displayed on the screen will be