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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <1UQdoObOD6.BJyHr5a6LBR@optiplex980-pc> Content-Language: en-US X-Provags-ID: V03:K1:b5fkeaeu42DR9zYf5yXczU0UiirFFE6Fay335+YyuYTvG6czC/C JPLPTxsJ0E+MYTu6kOrb5RLcYFa+jijHBhGqjor1q7B7b6aKpyrNBV/9wnwQ+v8y6Sj+V2d 0P3KPUeTF6OHtLbIsTEyJJRahESA1fFxECY1WBrAmycGOueM2trdlcbxJNoBXOFJEe2Tjq4 6+egLYOiE+tjlOyAVQeEw== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V01:K0:Q9FSB8mnHcM=:B4ZxFphPxaT6CCXfUBYabZ S4yKaa3ywlyrS77UYPotF+KR5grP0YTcOsXhgcwL/zwXdSFy8O0DR3X8Eh/ON7cKajWwj691m DK/e1bTcoFCgGVFHCZ/zc5hZTefYoBepADxMa8KL5i+E4hdSYNLasyvRAsZisMjpkAbOfgsra GNOKwRw6qmuN4ZFYBJLwvtlaJ0lnBVmXVzXEEYmqZ+1J1MX70jBDdEBP4ijOPCRwM33bpCiwu XVF5+DhXsQDple/7cNoxmj2nIyhFY9MKk7kaO3Rr9Qgt4txM1UevA/MALocqTyCH26qRG8Hey /Jhao/JG19SdESmtkIrRhvyTVBo8OInQD2QZ3E+F/QGJKdyWXzZTJw9Lk7SHgdqqiQdaS93md TYXTFzyRzY3loD4fpnsQG5MOgZ9h7Lp6a481ssgMtBIErhvjM5CcX1E6OO6wmDoe3s3JkRSg4 ekuYtD7/lXHs/iwZTJmV4t73ElVCeqlBqOn1gsj9HdMKHHeVe8O7Z3Oo51fzXlu5zPlZwXwCe kvRA5LiAtu2DXnKSvTxHqp+r6GdcTyuV4048VGMmDMeyWFN4dvdw0f3lUg1xViy4kJP0teF63 bmLV07uZKzecSl4feEcFeOZiX0KQNf9SyCoy8v0MLykoGr+2XlBUGyX1rDeSRny2ZCXqHgd5a XXQm7XMA2vUEHWvM7LnUNeU77g5mFuxXOpT3MWO4ExzOrZrjtmMJp09Fv7Nhv8uaD0IJBy9M6 YUfvbq+6iPUByk3hr9MhJspIYnhYZ2YESFbYNjuJUeewP6ENmm+MFmd7Yl2E127ZWhDqHSiKm /z8lWdefzzEa9+URB84CqJqFlf2ng== X-Spam-Score: -0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Thanks Jay, That sounds like a very good approach. I will see if I can find someone within daytime range who has accurate power control and is interested in doing that. It is not easy for me to adjust power in sm [...] 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 [74.208.4.196 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-Scan-Signature: 739d4fb39bd02fc5a2de5437a39bb056 Subject: Re: LF: 630m JT9-2 last night Content-Type: text/plain; charset=utf-8 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=0.0 required=5.0 tests=none 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 Thanks Jay, That sounds like a very good approach. I will see if I can find someone within daytime range who has accurate power control and is interested in doing that. It is not easy for me to adjust power in small steps on the fly. Signals tend to be very stable during the day. It might be interesting to start with JT9-1, decreasing power in 1 dB steps until it stops reliably decoding, then switch to JT9-2 and keep going down in 1 dB steps until it stops decoding, then switch to JT9-5 and keep going down. As you say, night time is more tricky. I think we need some kind of test like this to compare one submode against another in real world conditions. 73, Paul N1BUG On 11/13/18 7:29 AM, jrusgrove@comcast.net wrote: > Paul > > John, W1TAG and I found a good way to evaluate software was to > run controlled testing between our two stations. The transmit end > was configured to easily change power in 1 dB steps so that > accurate measurements could be made. We would run the first set > of tests during mid day so there was low noise, phase shift and > skywave interference. The second test was during nightime > conditions ... with all of the above anomolies. We would test for > weak signal performance, static immunity and decoder recovery > time after loss of signal during the transmission. While we often > couldn't put 'precise' numbers on the various modes (especially > at night) we could usually resolve things to a couple dB. > Comparing one mode against another during these tests definately > gave a 'feel' for what modes worked well up to expectation ... > and those that didn't. > > Jay W1VD