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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: schrieb Stefan, :) Why do you think so? Its linked to the DSP engine in Op , there is a timing issue , if other applications lock the sound card at a different rate , due to the % tolerances , low level decodes can be lost , noting, Op is a 'data mode , so the overheads in the transmission are much higher , as are the DSP engine requirements , as can be seen with 'older' pc's cpu loading can be a issue , as is a one-pass system , all the processing is taking place in real time [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.12.242.68 listed in list.dnswl.org] X-Scan-Signature: ac0f6ff1af52b6036ac1f4fe0c2bd52c Subject: Re: LF: 4X OP32 report Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.1 required=5.0 tests=MISSING_OUTLOOK_NAME 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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:470265952:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d404e501019fd23ad X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none schrieb Stefan, :) Why do you think so? Its linked to the DSP engine in Op , there is a timing issue , if other applications lock the sound card at a different rate , due to the % tolerances , low level decodes can be lost , noting, Op is a 'data mode , so the overheads in the transmission are much higher , as are the DSP engine requirements , as can be seen with 'older' pc's cpu loading can be a issue , as is a one-pass system , all the processing is taking place in real time But on with the show , 73 -G.. -76 dB in 28 mHz b/w , what is that when translated to 2.5Khz B/w ? -------------------------------------------------- From: "Stefan Schäfer" Sent: Wednesday, July 25, 2012 3:08 PM To: Subject: Re: LF: 4X OP32 report > > Am 25.07.2012 15:51, schrieb Graham: >> >> Pity nothing decoded in the US last night , but signal 's in 1500 >> /2000 mile range where quite substantial ... >> from this , it seems that propagation on 136 is really linked to the >> seasons ? > > Yes (of course) and no. W1VD received me quite well a few weeks ago, see > https://dl.dropbox.com/u/19882028/LF/07_July2012.jpg > Not to forget W1TAG: > https://dl.dropbox.com/u/19882028/LF/DK7FC_Juli2012.jpg > > So there is some propagation in summer but of course it depends on the > solar activity. Don't know how the condx have been yesterday. > >> One point from previous trials , If Spec-lab is used with Opera >> , then SL must be set to 48Khz sample rate , or OP can loose low >> level decode sensitivity. > Why do you think so? As long as the frequency range of a SSB bandwidth at > audio levels passes through the SL filter, then it should be fine. So 8 > kHz SR should be fine. Of course it depends on which shift frequency you > have to use. I have to use 11 kHz shift and so i choosed a SR of 30 kHz. > > > 73, Stefan >