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{{DYK talk|12 July|2022|entry=... that early [[floppy disk]]s used '''[[Frequency modulation encoding|FM encoding]]''' that took up only half the available storage?|nompage=Template:Did you know nominations/Frequency modulation encoding}}
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== Feedback from New Page Review process ==
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::There are literally millions of hits to look through. I don't think I'm being unreasonable in suggesting you apply a little more google-fu before reaching any conclusions. [[User:Maury Markowitz|Maury Markowitz]] ([[User talk:Maury Markowitz|talk]])
:::Thanks for your work. On the last note, how did you get "reaching any conclusions" out of what I actually said which is merely that I have concerns? <b style="color: #0000cc;">''North8000''</b> ([[User talk:North8000#top|talk]]) 14:27, 11 June 2022 (UTC)
::::{{ping|North8000}} I like to deal with issues one at a time. Do you wish to continue talking about items 2 and 3 on your list, or do my comments above sufficiently demonstrate the term is both "in use" and the proper title for the article? [[User:Maury Markowitz|Maury Markowitz]] ([[User talk:Maury Markowitz|talk]]) 14:37, 11 June 2022 (UTC)
:::::It's enough to turn me into a neutral bystander on the issue. Sincerely, <b style="color: #0000cc;">''North8000''</b> ([[User talk:North8000#top|talk]]) 21:25, 11 June 2022 (UTC)
:{{ping|North8000}}Ok excellent. This leaves only the first point to be addressed. The article corresponds to the third of your questions, "An instance of use of Manchester coding?" How would you improve the wording to make this more clear? Keep in mind, it's not ''just'' the encoding, but the overall format as well.[[User:Maury Markowitz|Maury Markowitz]] ([[User talk:Maury Markowitz|talk]]) 11:32, 12 June 2022 (UTC)
::I'd need to read more in this specialized area to make any full informed comment. Lacking that, I can only just throw out possible ideas which I know will be wrong on the detail. One would be to rewrite the first sentence because it conflicts with what you just said. It says that it is a type of coding. So along the lines of "is an approach to storing data on disk drives using manchaster encoding" . An unrelated idea is to change the title to something like "Frequency modulation encoding (disk storage)" to clarify from the more common use of "FM". BTW I'm marking this as reviewed. Sincerely, <b style="color: #0000cc;">''North8000''</b> ([[User talk:North8000#top|talk]]) 13:09, 12 June 2022 (UTC)
== Instance of Manchester encoding? ==
I think this article, [[Run-length_limited]] and [[Differential_Manchester_encoding]] say that the frequency modulation encoding is a differential Manchester encoding erroneously. The encodings have the same aim of limiting run-length, but there are obvious differences (presence of the evenly-spaced clock and using sole change of frequency to tell 0 from 1 data bit apart in FME). None of the three articles has an inline citation for such claim and I couldn't locate one in Google/Google Books. [[User:PaulT2022|PaulT2022]] ([[User talk:PaulT2022|talk]]) 07:00, 27 March 2023 (UTC)
:Pinging @[[User:David Eppstein|David Eppstein]], as it appears to have been [https://en.wikipedia.org/w/index.php?title=Frequency_modulation_encoding&diff=prev&oldid=1083452524 added] following the [[Template:Did you know nominations/Frequency modulation encoding]].
:Is there a source for "It is the same code as the one described in differential Manchester encoding"? Am I missing something obvious by seeing them as different encodings? [[User:PaulT2022|PaulT2022]] ([[User talk:PaulT2022|talk]]) 03:49, 28 March 2023 (UTC)
::Our [[frequency modulation encoding]] article describes each data bit as being encoded by two time windows, with a single signal transition possible per window, and with the encoding of the bit determined by whether one or two transitions happen in these two windows. So does our [[differential Manchester encoding]] article. Do you think that one of these two descriptions is incorrect? Which one, and why? —[[User:David Eppstein|David Eppstein]] ([[User talk:David Eppstein|talk]]) 03:55, 28 March 2023 (UTC)
:::You're right! I was confused by wording of the [[Differential Manchester encoding]] article and assumed it refers to differential transmission of regular (biphase-level) Manchester code. The first sentence of its lead is ambiguous and can apply to either.
:::Compare what article says currently with how it's defined in Horowitz and Hill, for example: {{tq|the bit value is encoded as presence or absence of a mid-cell transition, following a mandatory transition at the beginning}}. [[User:PaulT2022|PaulT2022]] ([[User talk:PaulT2022|talk]]) 05:05, 28 March 2023 (UTC)
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