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The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Stefan wrote: > Would the stability of my signal reach the requirements > as well? Is the antenna current stable? Then probably the short-term phase is steady enough. Your transmission on 2012-12-15 was upset by 'RF' getting into your 10kHz reference but I think you got that fixed. [...] Content analysis details: (0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [217.72.171.49 listed in list.dnswl.org] 0.7 SPF_NEUTRAL SPF: sender does not match SPF record (neutral) X-Scan-Signature: 6ffbd2c9950b634d6cc91f9565b01a8b Subject: Re: VLF: Coherent BPSK at 8270 from DF6NM Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Stefan wrote: > Would the stability of my signal reach the requirements > as well? Is the antenna current stable? Then probably the short-term phase is steady enough. Your transmission on 2012-12-15 was upset by 'RF' getting into your 10kHz reference but I think you got that fixed. You would need to rig something up to reverse the phase according to the pattern of 1s and 0s in a text file. The computer that does that needs to have its clock tied to UT by NTP. An audio transformer and a double-pole double- throw relay will do the phase reversals. You could control the relay using a bit on the PC parallel port or use one of the modem control lines out of COM1. Perhaps if you get the chance, send a one hour carrier to give me an S/N measurement - then we can select a suitable symbol rate. Best window is 07:00 to 11:00 UT but not every day has a good noise floor - some days are very bad and completely useless. Anyway, I'm not quite ready for another test yet. Getting so much out of the two signals from Markus, still much to do and will have to alter the coding again and run some near-field trials of that first. Next test probably with rate 1/8 K=25 which could be the strongest FEC code ever used for amateur radio. My best K=25 code is showing a bit of an error floor at higher S/N so I have a bit of work to do on that too. -- Paul Nicholson --