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

[韦明川]

Hi Jean,


LHCP or RHCP would not matter, as we are using linear polarization antenna onboard.


Expecting your results!


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; bg2bhc at gmail.com

At 2018-06-10 20:25:46, "Jean Marc Momple" <jean.marc.momple at gmail.com> wrote:

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> 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; bg2bhc at gmail.com



At 2018-06-09 23:56:48, "Jean Marc Momple" <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> 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; bg2bhc at gmail.com
>> 
>> 
>> 
>> 
>> 
>> _______________________________________________
>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership. Opinions expressed
>> are solely those of the author, and do not reflect the official views of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb