All Questions
12
questions
0
votes
1
answer
2k
views
How to get RMS voltage and frequency from datapoints read from an ADC?
I have an ADC that samples 4000 times per second or 0.25 ms interval per sample. I would like to extract the RMS and frequency value of the signal being read. How do oscilloscopes and multimeters do ...
- 917
0
votes
3
answers
1k
views
Does data rate increase with channel frequency?
It is commonly said that a higher channel frequency implies a higher data rate. For example, in https://www.howtogeek.com/222249/whats-the-difference-between-2.4-ghz-and-5-ghz-wi-fi-and-which-should-...
- 15
5
votes
3
answers
888
views
What determines the frequency of network cable
You have Cat6, 23 AWG, rated for 250Mhz frequency. You then have Cat6a, 23 AWG, rated for 500Mhz. Both are unshielded.
How is Cat6a able to transmit data at a higher frequency then its counter part?
...
- 51
0
votes
1
answer
200
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What is the minimum freqeuncy required to transmit 2400 bits per second? [closed]
Yes we can use diiferent symbols and modulation sechemes for example QAM ,DPSK,QPSK etc... you can use any modulation secheme. What will be or can be the minimum frequency to transmit information ...
-1
votes
2
answers
123
views
communication 101 [closed]
I have a couple of really basic questions.
(1) When a device(Device 1) communicates to another device(Device 2), do the devices have to operate in the SAME frequency for the data transmission to take ...
- 7
0
votes
1
answer
127
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frequency allocation for telecommunication companies
For a high bit rate in data communication we need a high bandwidth. Suppose there are hundreds of carriers in a particular region and they are all allocated microwave frequencies. Minimum spacing ...
- 101
4
votes
1
answer
21k
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Required Bandwidth for ASK
In Amplitude Shift Keying, the bandwidth required is given by \$B=(1+d)S\$ where B is bandwidth, S is the signal rate, and d is a value of either \$0\$ or \$1\$.
But how could the required bandwidth ...
- 389
1
vote
2
answers
15k
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Relationship between sampling rate and number of levels/bits in PCM
It is said in the books that increasing the levels of quantisation codes in Pulse Code Modulation, or in other words increase the number of bits, could give a better signal.
I understand that having ...
- 389
2
votes
4
answers
676
views
Where should an increase in harmonic frequencies go in the Nyquist formula?
From the Nyquist formula that \$ Capacity = 2 \times Bandwidth \times log_2(L) \$, where \$L\$ is the level the signal represents, the total number of possible bit combinations the signal can ...
- 389
6
votes
4
answers
15k
views
Why do all digital signals have infinite bandwidth?
Why do digital signals have "infinite bandwidth"? Frequency is the number of cycles per second. I have seen before the formula that bandwidth = maximum frequency - minimum frequency. I ...
- 389
-2
votes
1
answer
5k
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What are Discrete and Continue Frequencies?
When it says "Periodic Digital Signal is composed of periodic composite analogue signal with infinite bandwidth with discrete frequencies" and "Non-periodic Digital Signal is composed of non-periodic ...
- 389
1
vote
4
answers
1k
views
Can a cheap, low bandwidth, long-distance wifi be physically and electronically possible for public use?
Since facebook and all the social media warfare, I have realized that the internet is awesome, but not very scalable to embedded devices: new generation network standards are still expensive to make ...
- 135