[amsat-bb] DSLWP Successful Configurations and Subsequent UHF Test Plan

[Jean Marc Momple]

Wei & all,

Everything working this side, decoded the raw file and uploaded on the server successfully.

Unfortunately could not take the opportunity of this morning transmission as a brand new preamplifier installed yesterday (tested OK) blew the fuse this morning and went SK. I replaced it today.

So ready for tomorrow’s transmission and if ever possible to receive the sat with a 2 x 15 ele. circular polarized antenna, DBA-270 preamp + 30m of 1/2” heliax feeder, I should make it. If not will wait for JT-4 transmission.

Any idea what is the best Polarization RHCP or LHCP? would be useful to start with the best one. In any case, as I would be at work during the pass, I will ask the XYL to change pol every 15 minutes anyway.

Thanks for all who helped me getting the setup working. Really appreciated, quite a good learning exercise.

73



Jean Marc (3B8DU)




> On Jun 9, 2018, at 9:14 PM, Jean Marc Momple <jean.marc.momple at gmail.com> wrote:
> 
> Wei, 
> 
> Thanks for prompt answer.
> 
> OK, got it working fine, but not not sure if uploading to you.
> 
> 73
> 
> Jean Marc (3B8DU)
> 
> 
> 
>> On Jun 9, 2018, at 8:33 PM, 韦明川 <wmc_jx at 163.com <mailto:wmc_jx at 163.com>> wrote:
>> 
>> Hi Jean,
>> 
>> Which recording and flowchart did you use?
>> 
>> for 2MHz recording, you should use frontend_dslwp_replay.grc in gr_dslwp/examples.
>> 
>> replay_dslwp_gmsk_250bps_0.5_coherent.grc in dslwp_dev is used for 40kHz recording.
>> 
>> Best Regards,
>> 
>> Wei
>> 
>> 
>> 
>> 
>> 
>> --
>> WEI Mingchuan
>> 
>> Research Center of Satellite Technology
>> Harbin Institute of Technology
>> mobile: +86-189-4501-5242
>> e-mail: wmc_jx at 163.com <mailto:wmc_jx at 163.com>; bg2bhc at gmail.com <mailto:bg2bhc at gmail.com>
>> 
>> 
>> At 2018-06-09 23:56:48, "Jean Marc Momple" <jean.marc.momple at gmail.com <mailto:jean.marc.momple at gmail.com>> wrote:
>> >Wei,
>> >
>> >Thanks for the update.
>> >
>> >I got everything working today, but could not try decoder with the raw file, getting error c“RuntimeError: file_meta_source: Could not extract sample rate.”. Also change my 30m 70cm feeder from RG213 to Heliax 1/2” to get some  more dB and also put a better preamp for some reasons, hopefully it.
>> >
>> >Could you please send the link for the updated radio info page mentioned in your mail as cannot find it? 
>> >
>> >Will monitor tomorrow morning and hopefully receive some signal…
>> >
>> >73
>> >
>> >Jean Marc (3B8DU)
>> >
>> >> On Jun 9, 2018, at 1:11 PM, 韦明川 <wmc_jx at 163.com <mailto:wmc_jx at 163.com>> wrote:
>> >> 
>> >> Hi OMs,
>> >> 
>> >> 
>> >> Just updated the radio info page of DSLWP with some configurations for successful downlink report. Hope it may help!
>> >> 
>> >> 
>> >> And the following tests for UHF are planned:
>> >> 
>> >> 
>> >> 10 Jun 03:40 UTC to 10 Jun 05:40 UTC, 
>> >> 10 Jun 22:00 UTC to 11 Jun 00:00 UTC, 
>> >> 11 Jun 06:00 UTC to 11 Jun 08:00 UTC, 
>> >> 11 Jun 14:00 UTC to 12 Jun 16:00 UTC
>> >> 
>> >> 
>> >> VY TN & 73!
>> >> 
>> >> 
>> >> Wei BG2BHC
>> >> 
>> >> 
>> >> 
>> >> 
>> >> 
>> >> 
>> >> 
>> >> --
>> >> 
>> >> WEI Mingchuan
>> >> 
>> >> 
>> >> Research Center of Satellite Technology
>> >> Harbin Institute of Technology
>> >> mobile: +86-189-4501-5242
>> >> e-mail: wmc_jx at 163.com <mailto:wmc_jx at 163.com>; bg2bhc at gmail.com <mailto:bg2bhc at gmail.com>
>> >> 
>> >> 
>> >> 
>> >> 
>> >> 
>> >> _______________________________________________
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>> 
>>  
>