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Frequency modulation, as the name suggests, modulates the carrier by changing the frequency of the signal emitted.

Pulse width modulation, changes the on-time of a square wave, but leaves the frequency of the carrier wave unchanged.

So, in frequency modulation, the frequency will vary between, say, 80kHz and 120kHz with a constant power level, but in pulse width modulation, the frequency will stay at 100kHz, but the on-time (the length of each pulse) will vary, hence the power level will vary accordingly.

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Q: What is difference between pulse width modulation and pulse position modulation?
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What is ppm modulation?

pulse position modulation, used in many RC model aircraft controls.


Difference between analog modulation and digital modulation?

Analog Pulse modulation is discreet in time but the formation is transmitted in continuous form. In digital pulse modulation, not only the time axis is discreet but the information is also in digital form. Examples of Analog PM are PAM and PTM i.e pulse amplitude and pulse time modulations respectively. Examples of Digital PM are PCM and PDM i.e pulse code and pulse delta modulations respectively.


Compare pulse code modulation and delta modulation?

delta modulation refers to the procedure of encoding and thereby transmitting only the difference between consecutive samples instead of sending each of the samples themselves. This method is useful only when the vaiation in the amplitude of the signal is small, otherwise, it leads to a phenomenon called "slope overload".Pulse code modulation is the procedure where each of the levels of an analog signal is assigned a value closest ro a quantizer level used to quantize the signal...Another method of PCM that can be confused with Delta Modulation is the D(ifferential)PCM. Here, the difference between the signals is encoded based on its magnitude..


What is pulse position modulation and demodulation?

It is used for the radio control of model aircraft,boats, cars.


What is the bandwidth of pulse position modulation?

probably (the carrier frequency +- the maximum frequency of the pulse train)/(the carrier frequency) but pulses have a lot of harmonics

Related questions

What is the difference between space vector modulation and pulse width modulation?

There is no difference.


What is the difference between pulse code modulation and delta modulation?

The difference between pulse code modulation and delta modulation is that pulse code modulation is a method of encoding audio information digitally while delta modulation is a method that converts analog to digital signal.


What are the advantages of pulse position modulation?

advantage of pulse position modulation


What type of modulation is pulse position modulation and why?

It is a type of Pulse modulation as in PPM the position of pulse of carrier pulse train is varied in accordance with the modulating signal.


What is the difference between Pam ppm and pwm in digital communication?

PAM-pulse Amplitude Modulation It encodes information in the amplitude of a sequence of signal pulses. PPM-Pulse Position modulation PWM-Pulse Width Modulation.It results in variation of average waveform.


Difference between delta modulation and differential pulse code modulation?

Delta modulation is not a type of quality conversion and runs on digital-to-analog, analog-to-digital. Differential pulse code modulation has a higher quality of conversion and runs on a 1-bit data stream.


What is ppm modulation?

pulse position modulation, used in many RC model aircraft controls.


What are the types of pulse modulation?

Pulse width mod, pulse amplitude mod, pulse position mod, pulse code mod.


How does differential pulse code modulation lower the bit rate of transmitted signals?

It signals the difference between successive sample sizes


Difference between analog modulation and digital modulation?

Analog Pulse modulation is discreet in time but the formation is transmitted in continuous form. In digital pulse modulation, not only the time axis is discreet but the information is also in digital form. Examples of Analog PM are PAM and PTM i.e pulse amplitude and pulse time modulations respectively. Examples of Digital PM are PCM and PDM i.e pulse code and pulse delta modulations respectively.


How do you calculate the width of pulse in pulse position modulation?

The width of the pulse in PPM is not important, but is usually very narrow and constant in any given PPM system.


Compare pulse code modulation and delta modulation?

delta modulation refers to the procedure of encoding and thereby transmitting only the difference between consecutive samples instead of sending each of the samples themselves. This method is useful only when the vaiation in the amplitude of the signal is small, otherwise, it leads to a phenomenon called "slope overload".Pulse code modulation is the procedure where each of the levels of an analog signal is assigned a value closest ro a quantizer level used to quantize the signal...Another method of PCM that can be confused with Delta Modulation is the D(ifferential)PCM. Here, the difference between the signals is encoded based on its magnitude..