DM full form

What is the full form of DM?

  • Delta Modulation

What does DM mean?

DM stands for delta modulation, It is used for analog to digital and digital to analog signal conversion techniques. DM has its roots in the differential pulse code modulation method. Delta modulation(DM) is a method to permit the use of a simple quantizing strategy for constructing the encoded signals which are over samples purposely to increase the correlation between adjacent samples of the signal and as seen in DPCM.

Difference Between Pulse Code Modulation (PCM) and Delta Modulation (DM)

What is PCM?

PCM stands for pulse code modulation, It is used for reworking analog signal into a digital signal. PCM is a good or sensible signal to noise ration. PCM wants to high transmitter bandwidth. PCM method is split into three elements, the initial stage is that the transmission at the provision end, second registration at the transmission path and conjointly the receiving side of the end. 

What is DM?

While in DM stands for delta modulation, It is used for analog to digital and digital to analog signal conversion techniques. DM is employed to realize a high signal to noise ratio.  DM is smaller than PCM. 

Difference between delta modulation (DM) and pulse code modulation (PCM):

  • PCM stands for pulse code modulations while in DM is stands for delta modulations.
  • In PCM feedback does not exist in transmitter or receiver while in delta modulation feedback existed in the transmitter.
  • PCM requires the highest transmitter bandwidth while DM requires the lowest transmitter bandwidth.
  • PCM is complex in terms of complexity of implementation, whereas DM is simple in terms of complexity of implementation.
  • In PCM per sample 4,8, or 16 bits are used while in DM only one's bit is used per sample.
  • PCM may be a technique wont to digitally represent sampled analog signals while in DM convert digital to analog and analog to digital converter.
  • PCM is costly, DM is cheap.
  • PCM has a good signal to noise ratio while in DM has a poor signal to noise ratio.
  • PCM is mostly used in video telephony and audio telephony, DM is mostly used in speeches as well as images.
  • PCM signals are required encoder and decoder both sides while in DM signals can modulate and demodulates.
  • In PCM Quantization error depends on the number of levels, while in DM slope overload distortion is present.

Explore more information:

  1. Difference between PCM and DPCM

Differences between Low Pass Filter and High Pass Filter

What is a low pass filter?

The lowpass filter is one type of frequency-domain filter that is used for smoothing the image and also it attenuated the high-frequency components and preserve the low-frequency components 

What is a high pass filter?

As we know that the high pass filter is the one type of frequency-domain filter that is used for sharpening the image and it also attenuates the low-frequency components and preserves the high-frequency components.

Here this article gives the difference between low pass filter and high pass filter to better understand this topic.

The main key difference between low pass filter and high pass filter are listed below:

  • A low pass filter is used for smoothing the image while in high pass filter is used for sharpening the image.
  • Low pass filter attenuates the high frequency while in high pass filter is attenuate the low frequency.
  • Low pass filter allows the frequency below the cut off frequency to pass through it but in high pass filter allows the frequencies above the cut-off frequency to pass through it.
  • In the Low pass filter, the low frequency is preserved in it but in high pass filter, high frequency is preserved in it.
  • A low pass filter consists of a resistor that is followed by a capacitor while in high pass filter consists of a capacitor that is followed by a resistor.
  • Low pass filter helps in removal of aliasing effect, High pass filter helps In the removal of noise.
Explore more information:
  1. Advantages and disadvantages of low pass filter
  2. Advantages and disadvantages of high pass filter

Full form of STP

What is the full form of STP?

  • Shielded Twisted Pair Cable


What does STP mean?


STP cable is one special type of copper telephone wiring which is used in some business installations. An outer covering or shield cable is added to the ordinary twisted-pair telephone wires and the shield functions are used as a ground. The more common kind of cable that is installed to your home is unshielded twisted pair.

As we know that the STP cable is similar to the unshielded twisted pair cable. STP cables are costlier compared to the UTP but have the advantages of being capable of supporting higher transmission rates across longer distances.

Advantages and disadvantages of high pass filter

A high pass filter is also called as HPF, it allows for easy passage of high-frequency signals from source to load, and difficult passage of low-frequency signals. Here now we have to discuss the advantage and disadvantages of high pass filters to better understand this topic.

Benefits or Advantages of high pass filter:

  • They are used in an audio processing system that filters unwanted noise.
  • They are used in various applications such as a broadcast receiver to select desired channel frequency.
  • When the use of a Butterworth filter has the magnitude response is zero at the geometric center of the passband. It has a simple transfer function where the coefficients of the polynomials are easy to calculate.

Drawback or Disadvantages of high pass filter:

  • They filter out od the DC offset of the signal.
  • If the component value is not selected correctly then we end up filtering the frequency which we actually need.
  • When using a filter if we don't select correct components then we get unwanted ripples in the passband or the stopband or unwanted phase shifts in certain frequencies.
Explore more information:


Advantage of STP over UTP Cable

Shielded twisted pair cable (STP) can reduce crosstalk with proper installation and maintenance. STP cables can resist signals from passing through the route coating and entering nearby wires by accident because of the special cable constructive.  Here this post gives information about what are the advantages of STP over UTP to better understand this topic.

Benefits or Advantages of twisted pair cable:

  • It is the least expensive medium of transmission for short distances.
  • It is relatively easy to implement and terminate.
  • It can be used to carry both pf the data analog and digital data.
  • It turn are less likely to cause interference themselves.
  • It is flexible and lightweight.
  • It is easy to set up and install.
  • Less susceptible to electrical interference caused by nearby equipment or uses of wires.
  • If the portion of twisted pair cable is damaged it does not affect the entire network.

Drawback or disadvantages of twisted pair cable:

  • Attenuation is very high.
  • It offers poor noise immunity as the result signal distortion is too much more.
  • STP called shielded twisted pair cable is more difficult to connect to a terminating block.
  • Being this cable is thin in size and they are likely to break easily.
  • Some transmission is limit.
  • Susceptible to noise and interference.
  • It supports lower bandwidth as compared to other media. It supports 10 Mbps up to a distance of 100 meters on a 10 base-T.
  • It supports lower bandwidth as compared to other media.
What are the Benefits of STP over UTP?

STP stands for shielded twisted pair cable. It is one type of twisted pair cable. It is basically similar to the UTP. It is similar to  UTP in which the wire pair are twisted around each other. Here this post gives the advantages and disadvantages of shielded twisted pair cable (STP) are listed below.

Advantages of shielded twisted pair cable (STP):

  • Shielding reduces the chance of crosstalk and provides protection from interference.
  • The advantages of STP over UTP is that it offers greater protection from cross talk due to shielding.
  • It offers better electrical characteristics than unshielded cables.
  • It can be easily terminated with a modular connector.
But one of the disadvantages of STP is that this cable is heavier and costlier than UTP and require proper grounding at both the ends.

Advantages and disadvantages of twisted pair cable

As we know that a twisted pair cable is one type of wiring in which they are two-conductor of a single circuit which are twisted together for the purpose of improving electromagnetic compatibility. Here this article gives the information about  Benefits or Advantages and Drawbacks or disadvantages of twisted pair cable to better understand this topic.

Benefits or Advantages of twisted pair cable:

  • It is the least expensive medium of transmission for short distances.
  • It is relatively easy to implement and terminate.
  • It can be used to carry both pf the data analog and digital data.
  • I turn are less likely to cause interference themselves.
  • It is flexible and lightweight.
  • It is easy to set up and install.
  • Less susceptible to electrical interference caused by nearby equipment or uses of wires.
  • If the portion of twisted pair cable is damaged it does not affect the entire network.

Drawback or disadvantages of twisted pair cable:

  • Attenuation is very high.
  • It offers poor noise immunity as the result signal distortion is too much more.
  • STP called shielded twisted pair cable is more difficult to connect to a terminating block.
  • Being this cable is thin in size, they are likely to break easily.
  • Some transmission is limit.
  • Susceptible to noise and interference.
  • It supports lower bandwidth as compared to other media. It supports 10 Mbps up to a distance of 100 meters on a 10 base-T.
  • It supports lower bandwidth as compared to other media.