Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [bandwidth]

Related to signal processing (a measure of the width of a range of frequencies, measured in hertz) or the rate of data transfer (or throughput) measured in bits per second

Disambiguation:

  • Signal Processing: Measured in hertz, this represents the difference between the upper and lower frequencies in a signal or set of frequencies.

  • Computing: It is measured in a bit-rate (bit/s, Mbit/s, Gbit/s, etc.), thus representing the capacity of the network, in amount of data over time.

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Why are USB devices slower than 480 MBit/s

Motivation With a signaling rate of 480 MBit/s USB 2.0 devices should be able to transmit data with up to 60 MB/s. However today's devices seem to be limited to 30-42 MB/s while reading [Wiki:USB]. That is a 30 percent overhead. USB 2.0 has been a…
Chris
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Oscilloscope Bandwidth, what's it all about?

This question popped up to me a few moments ago. I was measuring what is intended to be a 50Mhz square wave of level 0 to 2.5, however what I saw on the screen is a sine wave that was centered around 1.2V and level of 0.5 to 2.0V, the frequency was…
Kevin Boyd
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Is this a good design & layout of an active differential 'scope probe?

This question is an extension of Homebrew differential 'scope probe. I thought I should make this a new question though. I need to measure a 100Mb/s LVDS signal to check its integrity. I will try to get hold of a 'scope with a 600MHz bandwidth, but…
Rocketmagnet
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How is Wi-Fi throughput so high?

While reading specs of a new ASUS Wi-Fi router - it said to have 2 GBPS throughput. How could it reach such throughput if all the WIFI bandwidth should be small and close to 2.4 GHz and 5 GHz?
Ron Vaisman
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How am I getting 1 Gbps through a CAT3 cable?

My work from home office, in a difficult-to-plumb part of my house, has an existing CAT3 running to it from the main part of the house. I wanted to use a wired connection because the Wifi flakes out occasionally, but it would cost a lot to properly…
user1717828
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How is rise time related to bandwidth of the signal?

Say, I want to limit the rise time of my digital signal edges to avoid dealing with transmission line effects. How do I determine the maximum frequency of harmonics in my signal knowing that my rise time is, say 5ns? How do I determine corner…
miceuz
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When would you need a low bandwidth opamp?

This opamp has a unity gain bandwidth of 27kHz, which is by far the lowest I've ever seen. (I first misread the 7.7V/ms slew rate as 7.7V/\$\mu\$s, because that's the units most often used.) 27kHz looks very bad. Is there any reason why they would…
Federico Russo
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Confused about frequency and bandwidth in BP filter?

I am trying to design a simple bandpass filter and I am confused what should be my central frequency and bandwidth should be. I have a 1MHz square wave with 20% duty cycle, so the signal is on for 200nsec and off for 800nsec. I have a rise time and…
Ktc
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Why are coaxial cables typically faster/longer than twisted pairs?

I'm having trouble understand why coaxial cables tend to have higher bandwidth compared to twisted pairs. I couldn't find any source explaining why, they just mention the fact. For instance: "In comparisons between coax vs twisted pair, coaxial…
Essam
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Was the last mile copper wire not the limitation in dial-up internet service?

My local internet service providers can provide ADSL (asymmetric digital subscriber line) service at various speeds, for example, 50 M bits per second. This service is in Canada. Is this typically provided on the same twisted pair of copper wires…
H2ONaCl
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If a square wave has infinite bandwidth, how can we see it on an oscilloscope?

If a square wave requires infinite bandwidth how can we display it on oscilloscopes? Link: Oscilloscope fundamentals.
OVIYA N
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Why do OOK transmissions have bandwidth?

With on-off keying, you have a single carrier wave at a constant frequency transmitting its presence or absence. Now I understand that the crystal will not be perfect so you will have some minimal shift over time in the carrier frequency, but…
Aidan
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Wideband matching network design

I have read about matching networks, authors usually will describe a target impedance to be presented, to say, the output of an amplifier, and then they design the matching network. To widen the bandwith they usually create a matching network with…
S.s.
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System bandwidth formula

Does anyone know how to demonstrate this formula? It is also worth noting that you should consider your entire system bandwidth. You need to factor in both the bandwidth of your probe and your oscilloscope to determine the bandwidth of your probing…
Jess
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Why do FM radio signals occupy greater bandwidth than AM?

If a 5kHz baseband signal is modulating an AM carrier wave, the sidebands will be centered around the carrier wave and the the signal will occupy 10kHz bandwidth. AM radio limits the upper modulating frequency to 5 kHz. But FM signals require a…
GNZ
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