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| To: | <[email protected]> |
|---|---|
| Subject: | LF: WSPR 502.400 Dial frequency ? |
| From: | "Graham" <[email protected]> |
| Date: | Mon, 26 Jan 2009 17:11:18 -0000 |
| Importance: | Normal |
| In-reply-to: | <878CA1EB1E7349DC9464A021BE1B86B0@p4> |
| References: | <B4B86DC7B7B84F648BB57AF66F5C3BBE@p4> <001c01c97fae$473a2600$0900a8c0@AM> <[email protected]> <006201c97fcd$5e425b00$0900a8c0@AM> <878CA1EB1E7349DC9464A021BE1B86B0@p4> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
Are we to adopt 502.400 Hz USB dial frequency for WSPR ? With 1500 Hz audio centre band tone. RF mid band carrier frequency of 503.900 Hz ? With 6 hz modulation and phase continues tone side bands and guard band are not a issue, the band edge is protected? 504KHz and its sidebands are actually x2 of the fundamental so should not present a problem as the 200 Hz slot is in a close in, dead zone, there amplitude increasing lower into the band, one of the reasons qrss and range testing takes place in this 'noisy' zone.I will add a note to the uk500khz group and links in others with details if acceptable to widen the reporting base. Tnx- Graham G0NBD |
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