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- Path: sparky!uunet!paladin.american.edu!howland.reston.ans.net!wupost!crcnis1.unl.edu!mpaul
- From: mpaul@unl.edu (marxhausen paul)
- Newsgroups: sci.electronics
- Subject: Re: tone decoder
- Date: 11 Jan 1993 17:24:05 GMT
- Organization: University of Nebraska--Lincoln
- Lines: 17
- Distribution: world
- Message-ID: <1isaflINN64s@crcnis1.unl.edu>
- References: <1ioiplINNt6f@moe.ksu.ksu.edu>
- NNTP-Posting-Host: unlinfo.unl.edu
- Keywords: tone decoder 567
-
- With the 567, you can optimize it for bandwidth (how far your signal can
- deviate frequency-wise and still be locked) or speed of capture (how quick
- it locks in) and a couple other things, but some of them are exclusive of
- each other - you can't have it all. Getting the 567 to lock and release
- at very high speed is tough, maybe even impossible. I'm sorry I don't
- have the data book handy, but when I did a project with these a while
- back I had to do a LOT of experimenting with capacitor values to find the
- optimal balance of bandwidth and speed, and stability. I really needed
- very tight bandwidth; as a consequence, my 567 circuit took about a
- half-second to turn on and almost a full second to "let go" when the
- signal went away.
-
- --
- paul marxhausen .... ....... ............. ............ ............ ..........
- .. . . . . . university of nebraska - lincoln . . . .. . . .. . . . . . . .
- . . . . . . . . . . . . . . grace . . . .
- . . . . . . . . happens .
-