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Middle school physics - NGSS
Digital signals
NGSS.MS:
MS‑PS4‑3
, MS‑PS4.C.1
, MS‑PS4.C
Review your understanding of digital signals in this free article aligned to NGSS standards.
Key points:
- Information can be stored in digital or analog form. Digital information is made from a certain set of values, or digits. Analog information is made from possibilities within a range.
- For example, a digital clock can show time with the exact values 0-9. But the hands on an analog clock can point to any value in the range from 0-12.
- Information in waves can be transmitted with either digital or analog signals using wave properties like frequency or amplitude.
- The properties of a digital signal match specific values, or digits in their set of values.
- The properties of an analog signal can be any value within a range.
- Digital signals are more reliable because interference or noise can be easily removed from the received signal. However, every change within an analog signal contains some information, so interference or noise can be almost impossible to remove.
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"Digital signals are more reliable because interference or noise can be easily removed from the received signal. However, every change within an analog signal contains some information, so interference or noise can be almost impossible to remove." do you mean that interference can be removed from digital but not from analog?(2 votes)
Essentially. Digital values are exact, they leave little room for interpretation, but Analog has more room for error, but also, more room for interpretation. Depending on what Analog is being used for, this could be a good thing.(2 votes)
ok thats just confusing(2 votes)
"Digital signals are more reliable because interference or noise can be easily removed from the received signal. However, every change within an analog signal contains some information, so interference or noise can be almost impossible to remove." do you mean that interference can be removed from digital but not from analog?(1 vote)
Why is it in the video about Analog vs. digital signals, at timestamp2:52, that instead of having the tens, it has the two multiplied by itself?(1 vote)- According to the seconds on the clock it would be 13 seconds until1:00PM/AM but since it's12:59yes it would be 13(1 vote)
it's saying 125947(1 vote)
Technically it says12:59.47, which means it is12:59AM/PM, one (1) minute until1:00AM/PM, but since we have the (.47) we know that it is actually thirteen (13) seconds until1:00AM/PM. Hope this clears it up for you.(0 votes)
- So they both are the same but they can tell the time but they are different(0 votes)
- so interference or noise can be almost impossible to remove." do you mean that interference can be removed from digital but not from analog?(0 votes)
2:52