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케이엠더블유, 주파수 대역폭의 주파수란 무엇일까? | 대역폭

by Hanh Nguyen

케이엠더블유, 주파수 대역폭의 주파수란 무엇일까?


นอกจากการดูบทความนี้แล้ว คุณยังสามารถดูข้อมูลที่เป็นประโยชน์อื่นๆ อีกมากมายที่เราให้ไว้ที่นี่: ดูเพิ่มเติม

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빅토리채널은 절대로 종목추천을 하지 않으며 투자에 대한 책임은 본인의 판단에 달려 있음을 알려드립니다.

케이엠더블유, 주파수 대역폭의 주파수란 무엇일까?

Spec Hack! Breaking the Bandwidth Barrier with Your Oscilloscope


Is this pushing it too far?
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6 Essential Tips for Getting the Most out of Your Oscilloscope:
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Video covering bandwidth basics:
https://youtu.be/T56XDhUyY2g
The DSOX1204G scope we used:
https://www.keysight.com/en/pdx2969966pnDSOX1204G/oscilloscope70100200mhz4analogchannels?cc=US\u0026lc=eng
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We all know that the goal of an oscilloscope is to take the signal on your device, and accurately represent it on the screen. All of the scope advice and howto info out there is centered around this idea.
But, what if you don’t care about getting an accurate representation? What can you do?
Today we’re going to push the traditional boundaries of an oscilloscope with what I like to call a “spec hack.” It’s not a normal “hack,” it’s more of a creative way of pushing your gear beyond what it could normally do. Throughout history, we as humanity have pushed the limits of our tools – just because we can. Think about lawnmower racing or mountain biking. Tools used for yard maintenance or transportation have been expertly modified into something that behaves in a new way.
So I got to thinking, what could you do with a scope if you didn’t care about getting a great signal reconstruction?
And this occurred to me. If you don’t care about good reconstruction you could exceed the bandwidth of your scope! If you aren’t familiar with the ins and outs of bandwidth, check out the video on that topic, there’s a link in the description – but here’s the short version. Any frequency components higher than your scope’s bandwidth will be attenuated. They appear smaller.
But, you’ll still see a signal.
Even though you can’t see the signal as it exists on the device, you can still see it. Which means you can do something with it, or at least learn something from it.
One of the things we can learn is the signal’s frequency.
Granted, the frequency components won’t look right, but the actual toggling of the signal up and down will give us frequency information.
All we need to measure that is a good trigger and the frequency counter built into this scope. You could also use the onscreen frequency measurement, but the frequency counter is actually a better fit here because it uses the scope’s trigger circuitry. And here’s where it gets really interesting.
The trigger’s circuitry and signal path is actually separate from the acquisition path. The trigger circuitry gets its own signal conditioning and uses a couple comparators.
Since we don’t care about an accurate reconstruction of our signal, we don’t need to use the signal going into the ADC, we can use the output from the comparators to measure the frequency.
Those trigger comparators are pretty convenient, because that’s exactly what we need for our frequency counter. It’s called a frequency counter because it literally counts. It counts the number of edges it sees in a specified amount of time, called the gate time. The frequency is then the number of pulses divided by the gate time.
A basic frequency counter is essentially just a comparator, which identifies signal edges, and a microcontroller to count the output and display the results. This is all already in place with the trigger comparators and scope processor.
I also just happen to have a signal generator that goes up to 44 GHz, which for today will probably be sufficient. /s
So the questions becomes, how high of a frequency can we measure? Let’s find out!
OscilloscopeHack Oscilloscope SpecHack Keysight Electronics ElectricalEngineering Power FrequencyCounter OscilloscopeFrequencyCounter ScopeHack

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Spec Hack! Breaking the Bandwidth Barrier with Your Oscilloscope

[나의시선]M1 MAX 맥북프로 14인치 3일사용기(Q\u0026A포함)


애플 맥북프로 M1 MAX 14인치 3일간의 사용기와 함께
많은분들이 궁금해하시는 내용들을 위주로 영상을 준비했습니다.
1. 전반적인 성능은?
2. 영상편집 및 사진작업시 어떤가요?
3. 디스플레이 연결해서 작업할 경우는?
4. 줌이나 페이스타임 사용느낌은 어떤가요?
5. 노치 및 디스플레이에 대해서 알려주세요.
6. 디자인이 예전으로 돌아간 것 같아요?
7. 가지고다닌 후기를 알려주세요.
8. 13인치 M1 맥북 프로와의 비교
9. 15인치 2017 맥북 프로와의 비교
10. 어떤 맥북 및 옵션을 선택해야 할까요?
애플 맥북프로14인치 M1맥스 m1max 풀옵션
즐겁게 감상해주세요!
M1 MAX 맥북프로에 관해 궁금하신점들은 댓글에 남겨주세요.
그리고! 구독과 좋아요도 부탁드려요^^
감사드리며,
나의시선

[나의시선]M1 MAX 맥북프로 14인치 3일사용기(Q\u0026A포함)

윈도우10 인터넷 속도 빠르게 하는 방법은 속도 제한 해제해 보자


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윈도우10을 사용하면서 브라우저를 바꿔 가면서 조금이라도 인터넷 속도를 빠르게 하기 위해 노력하실 겁니다.
저 역시도 마찬가지입니다.
하지만 속도 제한 해제로 좀 더 쾌적환 인터넷을 즐길 수 있습니다.
[출처] https://blog.naver.com/ghkdlxls7610

윈도우10 인터넷 속도 빠르게 하는 방법은 속도 제한 해제해 보자

What is Bandwidth?


In the world of live streaming, bandwidth refers to the rate of data transfer your computer and other devices have access to, measured in bits per second. Because bits are such a small unit of data, bandwidth speeds are usually referred to with the prefixes like kilo, mega, or giga. Kilo means thousand, mega means million, and giga means billion. So, for example 1 kilobit is the same as 1 thousand bits, 1 megabit is 1 million bits and 1 gigabit is 1 billion bits.
These same prefixes also apply to bytes. It is important to understand however, that bits and bytes are NOT the same. A bit is the smallest unit of computer information, representing either a 1 or a 0. Data transfer speeds are usually represented in bits per second, and data storage is usually measured in bytes.
When you talk about bandwidth, there are usually 2 different processes taking place; upload and download. Download is the process of retrieving data from the internet, while upload is the process of sending data from your devices to the internet. This is the same process that happens when downloading a file from the internet, however within the context of live streaming, its application differs greatly.
The main difference between downloading and uploading files as opposed to streams, is that files usually do not require a minimum bandwidth to transfer data properly. File downloads and uploads will simply operate at whatever speed your network’s bandwidth allows. Streaming on the other hand, depending on the production setup. When you start live streaming, you generally have to choose a bitrate which encodes your audio and video into a stream of information that uses upload bandwidth. It is essential to know your network’s upload and download speed because these rates can affect the quality of your outgoing streams. You can check your bandwidth speeds by going to Google and searching for “Speed Test”.
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Typically, 0.5 megabits per second is considered the bare minimum bandwidth for live streaming. 23 megabits per second is required for 720p video streams and 36 megabits per second is suitable for High definition streams up to 1080p. Ultra HD streams in 4k will require even higher bitrates.
Note: Always have some extra upload bandwidth available.
This extra “headroom” acts as a buffer to account for any fluctuations in your network and therefore will result in a more reliable stream. In addition it is important to consider that each additional service that you are streaming to adds to your total outgoing bit rate, thus using more bandwidth. So if you plan on streaming to Youtube, Facebook and Twitch, all at the same time, you will need to ensure you have enough bandwidth capabilities to do so.
In order to take full advantage of your network bandwidth you will need hardware with matching or superior bandwidth capabilities. This means buying a motherboard and/or switcher with an ethernet port that is rated for your bandwidth speed. You will also need to make sure your ethernet cable is rated for these speeds as well to get full access to your available bandwidth. Ethernet cables are usually rated based on their bandwidth capabilities. For example, CAT4 cabling is capable of providing 16 megabits per second, while CAT5 cabling can reach 100 megabits per second. CAT5e and CAT6 are rated for up to 1000 megabits per second and CAT7 is rated for 10 gigabit applications.
Another important aspect to consider is how much of your available bandwidth your stream will use. Higher resolution and framerate streams will require more bandwidth than lower quality streams. This is why it is important to set your final bitrate within your streaming software, according to the quality of the stream you wish to broadcast, while also ensuring that bitrate is not too high for your network bandwidth capabilities.
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What is Bandwidth?

นอกจากการดูหัวข้อนี้แล้ว คุณยังสามารถเข้าถึงบทวิจารณ์ดีๆ อื่นๆ อีกมากมายได้ที่นี่: ดูวิธีอื่นๆTechnology

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