To: | [email protected], [email protected] |
---|---|
Subject: | LF: RTE 252kHz |
From: | Andy Talbot <[email protected]> |
Date: | Sun, 1 Nov 2015 14:44:41 +0000 |
Dkim-signature: | v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=TrvLVqPmL49O0kRMhHZzIpjhMA9zAOa4klQ6LwhryDU=; b=rsBrqT9WO4qLh3BbAD2895C8SPe08V5FL+EYHjryDEPSP3s9NruzwrH4OFuNgTTgdp 5r0Y+wWOjYvY0CmGp7Z/bVDM0oyXrz5HIuj/Y33aqpRNfanEHsqPVck+xBUWXfK5nktz o69Kp5H4CiPlgWnQYWgNhor//pdpS1t5F+V2vEDXirj/xlutRDPfsLislTPp4IMkoNb0 6oPm1/0g3lJ8OZ+C1Eq7cqNfEd3FKr3hFu9QlJF8HPn3zFP3pH1vVlFBdmuxHUDE7nde woeF6PeTgDNRfossyHVmPhf7LVI3Ky3sT+g6e4ddDZ6mbtfSqxIYtxQ5CCMX70dR6K/Q TAng== |
Reply-to: | [email protected] |
Sender: | [email protected] |
Hope this graphic passes though the two groups / reflectors... It shows a vectorscope plot of the 252kHz RTE broadcast carrier this afternoon. The mean phase of the carrier is solid for hours, suggesting the transmission is at least Rb controlled as the points do not rotate around the vectorscope screen. The interesting bit is the smaller circle with a radius of about 15 - 25% of the mean signal amplitude, caused, I assume, by ionospheric frequency shifting of a substantial skywave portion of the signal. The plot represents 8.2 seconds worth of carrier history, the small circle taking about 4 seconds to form, suggesting there is 0.25Hz worth of skywave frequency shift associated with it. I'll try Droitwich as dusk arrives, but its annoying carrier modulation means the resulting plot will not be so 'clean' Andy G4JNT |
<Prev in Thread] | Current Thread | [Next in Thread> |
---|---|---|
|
Previous by Date: | Re: LF: Re: FR5ZX on MF WSPR, Fausto Coletti |
---|---|
Next by Date: | Re: LF: Re: FR5ZX on MF WSPR, John Langridge |
Previous by Thread: | LF: MF High stability transmissions, Andy Talbot |
Next by Thread: | LF: Re: RTE 252kHz, Alan Melia |
Indexes: | [Date] [Thread] [Top] [All Lists] |