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Why scope frequency is always greater then signal frequency in the oscilloscope?
Wiki User
∙ 12y ago
In the course of sampling a signal to graph the parts of a repeating event on the display, the sampling must be done faster than the event you want to graph. If the sampling is done slower than the event then you will be displaying several parts of the event in a single dot on the display, highly inaccurate.
The signal sampling must be done fast enough to display the event in enough detail. The higher you set the scope frequency, the wider the event appears on the display, possibly losing the sides of the event if you go too high.
Wiki User
∙ 12y ago
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What will happen if frequency of modulating signal is greater than the carrier signal in amplitude modulation?
Then the signal will be the same amplitude.
How can you see out signal on oscillscope?
A; An analog oscilloscope will display a signal to a CRT the same principle as a TV can display movies
Which signal has a wider bandwidth a sine wave with a frequency of 100 hz or a sine wave with a frequency of 200 hz?
The signal that changes at a higher rate occupies greater bandwidth.
When low frequency signals added to high frequency signal then the envelope signal will follow which signal?
the low frequency signal which is nothing but the message signalNeither. The envelope will be that of the difference beat frequency. To get the envelope to follow the low frequency input signal you need to mix (multiply) the two signals, not add them.
Is The carrier frequency is usually lower than the modulating frequency?
when the frequency is low , energy will be obviously low. To increase the energy of the signal we need to increase the frequency. This is achieved by multiplying the message signal with the carrier signal (with high frequency).
What is a modulation enveloped?
A: A radio transmission signal has an envelope where the carrier frequency are enveloped by the analog signal before demodulation. it can easily be seen by an oscilloscope
What is the difference between telivision and cathode ray oscilloscope?
difference between cathode ray oscilloscope and TV receiver
What are the advantages of using an Oscilloscope over a voltmeter?
In the name of Allah,the most Gracious,the most Merciful... The Oscilloscope has several advantages over a voltmeter, for example if you want to determine a signal parameters [ voltage values (max,peak-to-peak,rms,average...etc),frequency,offset...etc ] using measurement tools: 1- You can use the Oscilloscope whatever the signal frequency is, but you can't use the Avometer unless the signal frequency is 50 to 60 Hz. 2- The Oscilloscope shows you the shape (form) of the signal, while the Avometer doesn't. 3- You can determine the maximum value of the signal (max voltage) and peak-to-peak voltage when you observe the signal on an Oscilloscope,hence you can calculate the rms (root mean square) value, i.e. the effective value , the average value and the offset of signal form the time axis (the horizontal axis). While an Avometer can only give you the rms value.
What will happen if frequency of modulating signal is greater than the carrier signal in amplitude modulation?
Then the signal will be the same amplitude.
What does oscilloscope an measure?
An oscilloscope takes an electrical input signal and converts it into a visible trace on a screen - i.e. it converts electricity into light. An oscilloscope helps us to measure the voltage(maximum)....We can also find frequency from it by using a Equation.. We can use the maximum voltage in this equation i=v(maximum)sinѠt to find the current.
What is the envelope of a signal?
The envelope of a signal is the "apparent" signal seen by tracking successive peak values and pretending that they are connected. Normally, this question involves amplitude modulation of a radio frequency carrier by an audio frequency signal. The two frequencies involved are very much different - 20 kHz versus 1 mHz, for instance, and this "envelope" effect will be very noticable on an oscilloscope.
Can you say whether a signal is periodic or nonperiodic by looking at its frequency domain plot?
Yes. The Fourier transform of a signal to the frequency domain will give rise to a graph that has energy (is greater than zero) at only the base frequency and its harmonics.
Can a Cathode Ray Oscilloscope measure DC Signal?
Yes.
How can you see out signal on oscillscope?
A; An analog oscilloscope will display a signal to a CRT the same principle as a TV can display movies
Does an oscilloscope generate soundwaves?
Not in itself. Bit it can convert the electric signal into sound.
What is the purpose of the voltage divider control in oscilloscope?
This control reduces the amplitude of the applied signal to a point where the whole signal can be displayed on the oscilloscope screen. The amount of voltage reduction is marked on this control switch so that it can be used as a voltmeter.
Which signal has a wider bandwidth a sine wave with a frequency of 100 hz or a sine wave with a frequency of 200 hz?
The signal that changes at a higher rate occupies greater bandwidth.
