Talk:Shmoo plot

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Copyright?[edit]

Is "Shmoo Plot" copyrighted by Teradyne or trademarked? I don't believe that a two word phrase can be copyrighted, only trademarked. --66.88.133.2 16:53, 27 September 2006 (UTC)[reply]

You're right about the application of copyright vs. trademark; I don't know if Teradyne really has a trademark on the name. They might however have a copyright on the design of graph paper for use in making a Shmoo plot.--Theodore Kloba 15:55, 11 December 2006 (UTC)[reply]

I checked the uspto.gov web site, and there is no mention of a copyright or trademark on shmoo, other than from Al Capp's estate. But you don't need a registered copyright to have a copyright. So the statement could be correct. 72.74.96.24 21:23, 18 June 2007 (UTC)[reply]

Terms cannot be copyrighted or patented, only trademarked, so the statement is at least inaccurate if not downright false. DanielPenfield 21:28, 9 August 2007 (UTC)[reply]

As substantial doubt has been cast on the veracity of this statement, now supporting evidence was offered, and I could find no such evidence on the Teradyne Web site, I have removed the statement. If you feel that it should be added back:

Please place it in a more appropriate location (it has really nothing to do with etymology).
Please add a reference or at least note any supporting evidence on this discussion page.

--213.71.6.220 (talk) 13:01, 14 January 2008 (UTC)[reply]

Example in external link is not inspiring[edit]

The GIF file example in the link is not very inspiring. We could do with some clearer examples of Shmoo plots. DFH 08:37, 8 August 2007 (UTC)[reply]

Image copyright problem with Image:Twoshmoos.jpg[edit]

The image Image:Twoshmoos.jpg is used in this article under a claim of fair use, but it does not have an adequate explanation for why it meets the requirements for such images when used here. In particular, for each page the image is used on, it must have an explanation linking to that page which explains why it needs to be used on that page. Please check

That there is a non-free use rationale on the image's description page for the use in this article.
That this article is linked to from the image description page.

This is an automated notice by FairuseBot. For assistance on the image use policy, see Wikipedia:Media copyright questions. --19:56, 2 November 2008 (UTC)[reply]

Date of first usage[edit]

The article suggests the term Shmoo Plot (a.k.a. Shmoo Diagram) was first used by IBM in 1970. Actually, the IBM 7090 Data Processing System first shipped in late 1959, and was accompanied by a "Customer Engineering Manual of Instruction" or "CEMI" which gave detailed instructions on how to generate and use a Shmoo Diagram when setting voltages in the core memory array. How do I know this? I worked on one of the (by then obsolete) systems in the early 1970s: I read that book extensively. (Last I heard, that system was being acquired for display by Paul Allen's museum.)

--Jordan L. Stedman, Shoreline, WA — Preceding unsigned comment added by 50.46.196.192 (talk) 18:10, 12 April 2017 (UTC)[reply]

If you could provide some sort of reference (e.g. a book or manual, preferably viewable online) that would be awesome. Adpete (talk) 00:24, 9 June 2017 (UTC)[reply]

A memo from MIT dated September 18, 1953 <https://dome.mit.edu/bitstream/handle/1721.3/39449/MC665_r06_M-2383.pdf?sequence=1> says "A system affected by n parameters will in general operate as long as these variables are set to correspond to some point within a "safe" volume in an n-dimension space whose coordinates are these parameters. If the system is a computer memory, the shape of the operable volume in the n-dimension space will depend upon the computer's program. This volume will henceforth be called a "shmoo."" — Preceding unsigned comment added by 129.22.152.23 (talk) 11:47, 14 November 2017 (UTC)[reply]

Abnormal Shmoo plot does not look abnormal to me[edit]

The plot shows the width of a valid CAS pulse with changes in Vcc. The changes appear quite normal despite the fact that the plot doesn't show a Shmoo blob. Can someone provide a quote tying that plot to abnormal behavior? Grumpyoldgeek (talk) 04:39, 24 May 2019 (UTC)[reply]