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Total 7 documents matching your query.

1. Re: LF: Droitwich carrier (score: 1): Author: [email protected]; Date: Wed, 31 Jul 2002 14:19:45 EDT; Hello group, An analysis of amplitude as effective voltage and phase with SpecLab produced this graph today (aplologies for embedding it in HTML format): The signal was received in USB (RX tuned to 1; /rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00000.html (8,944 bytes)
2. LF: Droitwich carrier (score: 1): Author: "Talbot Andrew" <[email protected]>; Date: Wed, 31 Jul 2002 16:03:53 +0100; Took a few seconds of the signal from Droitwich with speech modulation, downconverted to 0 - 6kHz and saved as a .WAV file. I already had some software that analyses a .WAV file for maximum and minim; /rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00003.html (9,707 bytes)
3. Re: LF: Droitwich Carrier (score: 1): Author: "James Moritz" <[email protected]>; Date: Wed, 31 Jul 2002 11:58:06 +0100; Dear LF Group, I looked at the Droitwich signal using Spectrum Lab last night - the phase modulated signal occupies a BW of about 80Hz centered on the carrier - however, measuring the carrier level i; /rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00008.html (9,519 bytes)
4. Re: LF: Droitwich Carrier (score: 1): Author: [email protected]; Date: Tue, 30 Jul 2002 19:42:06 EDT; Hi, I have no AM broadcast experience, having only been chief engineer of an FM (but not AM) BC station in the 1960s, but from my amateur experience, any form of controlled-carrier transmission I've; /rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00009.html (8,834 bytes)
5. Re: LF: Droitwich Carrier (score: 1): Author: "Steve Dove" <[email protected]>; Date: Tue, 30 Jul 2002 19:26:43 -0400; Hi Alan, As far as I know the senders at Droitwich were Macaroni 'PULSAM's, their trendy name for PWM modulation, and installed some 20 years ago; these essentially are a whacking great class-D audio; /rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00010.html (10,045 bytes)
6. LF: Droitwich Carrier (score: 1): Author: "Alan Melia" <[email protected]>; Date: Tue, 30 Jul 2002 22:08:00 +0100; Hi all, I was fascinated by Dick's measurements I decided I would swing the radio onto Droitwich and switch through the filters. The measurement was made at 2015z tonight Tuesday.....a science progra; /rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00013.html (10,513 bytes)
7. Re: LF: Droitwich carrier (score: 1): Author: "James Moritz" <[email protected]>; Date: Thu, 01 Aug 2002 15:25:42 +0100; Dear LF Group, I looked at several LF and MF broadcast carriers last night; some showed carrier levels that increased in the quiet periods like Droitwich, others increase the carrier level with incre; /rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00203.html (9,752 bytes)

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