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- Path: sparky!uunet!ukma!wupost!cs.utexas.edu!sun-barr!lll-winken!telecom-request
- From: jmalloy@itsmail1.hamilton.edu (Joseph T. Malloy)
- Newsgroups: comp.dcom.telecom
- Subject: Re: Help Needed With DTMF Tones
- Message-ID: <telecom12.854.6@eecs.nwu.edu>
- Date: 16 Nov 92 16:03:48 GMT
- Sender: Telecom@eecs.nwu.edu
- Organization: Hamilton College - Clinton, NY
- Lines: 9
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 12, Issue 854, Message 6 of 12
-
- DTMF requires both tones, no question there. But my ancient physics
- memory recalls that when two waves are combined, the resulting output
- is (unless filtered) four tones: the original two, another that is the
- sum of the first two, and a fourth that is the difference between the
- original two. Do I have this wrong?
-
-
- Joe jmalloy@hamilton.edu
-