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amused MAME Fan Reged: 04/24/08 Posts: 297 Send PM Re: Xtal compensation theory 101: Part 2 07/03/12 11:04 AM Reply > Shown is a plot of a compensated TCXO. This is a more common and less expensive > compensation method. You ~still~ won't find these in most clocks, at $2-10 a pop. > This compensation method usually utilizes some form of reverse error generation > applied to a crystals natural error curve. Generally you would run a crystal over > temperature, capture it's frequency response, and then generate a 4th or 5th order > polynomial equation for that response. To compensated for the error in any given > crystal, you then would calculate a second polynomial equation to generate a > cancellation signal to bring the crystal as near to nominal as possible. There are > several means by witch to apply that correction to the crystal. All of them have > their pluses and minuses. "Reverse error generation"? "Cancellation signal"? You mean, as opposed to a lookup table containing values such as "500000" and "500012"?

Entire thread Subject Posted by Posted on What time is it? (rant) amused 07/02/12 12:46 PM Did an elephant sit on your fence? GatKong  07/02/12 09:51 PM For reasons I can't explain, I love this thread. *nt* Stiletto  07/02/12 05:51 PM Re: What time is it? (rant) Gor  07/02/12 04:21 PM Re: What time is it? (rant) amused  07/02/12 05:05 PM Re: What time is it? (rant) Gor  07/02/12 06:45 PM Re: What time is it? (rant) JWJr  07/02/12 05:25 PM Re: What time is it? (rant) amused  07/02/12 07:18 PM Re: What time is it? (rant) italie  07/02/12 07:30 PM Re: What time is it? (rant) amused  07/02/12 07:36 PM Re: What time is it? (rant) italie  07/02/12 07:48 PM Re: What time is it? (rant) amused  07/03/12 03:45 AM Xtal compensation theory 101: Part 1 italie  07/03/12 05:45 AM Xtal compensation theory 101: Part 2 italie  07/03/12 06:23 AM Re: Xtal compensation theory 101: Part 2 amused  07/03/12 11:04 AM Re: Xtal compensation theory 101: Part 2 italie  07/03/12 01:42 PM Re: Xtal compensation theory 101: Part 2 amused  07/03/12 04:24 PM Re: Xtal compensation theory 101: Part 2 italie  07/03/12 05:29 PM Re: Xtal compensation theory 101: Part 2 Bekki Doll  07/07/12 12:05 AM Re: Xtal compensation theory 101: Part 2 Vas Crabb  07/03/12 04:27 PM Re: Xtal compensation theory 101: Part 2 Gor  07/03/12 05:20 PM Xtal compensation theory 101: Part 3 italie  07/03/12 07:25 AM Re: What time is it? (rant) lharms  07/02/12 10:01 PM Re: What time is it? (rant) amused  07/03/12 03:50 AM Just one question (yes, only one) italie  07/02/12 02:02 PM Re: Just one question (yes, only one) amused  07/02/12 02:40 PM Re: Just one question (yes, only one) Tomu Breidah  07/02/12 03:52 PM Re: Just one question (yes, only one) italie  07/02/12 03:47 PM Re: Just one question (yes, only one) amused  07/02/12 04:02 PM Re: Just one question (yes, only one) italie  07/02/12 04:22 PM Re: Just one question (yes, only one) amused  07/02/12 05:07 PM Re: Just one question (yes, only one) italie  07/02/12 07:51 PM Re: Just one question (yes, only one) TriggerFin  07/02/12 08:36 PM Re: Just one question (yes, only one) italie  07/02/12 09:07 PM

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