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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: Phase meter for propagation experiment |
| From: | "Stewart Bryant" <[email protected]> |
| Date: | Mon, 15 Apr 2002 22:49:49 +0100 |
| References: | <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | <[email protected]> |
I got out my copy of ISO/IEC 13818-1 which defines the transport system for digital televison. DTV systems have an accuracy defined by their 27 MHZ system clock. Everything is defined by that clock frame rate, line rate, colour burst. The accuracy is 27 000 000 +/- 810Hz with a permitted rate of change of <= 73 *10E-3 Hz/s Thus the phase measurements must be made wrt an analogue TV transmission. 73 Stewart G3YSX |
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