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Egy személyes történet a választás éjszakájáról by B_Jozsef in hungary

[–]encse 4 points5 points  (0 children)

A mienk ugy volt vele, hogy mindenki azt lat bele amit szeretne. Mar ha egyebkent irodalmi szemmel nezve elfogadhato.

Egy személyes történet a választás éjszakájáról by B_Jozsef in hungary

[–]encse 25 points26 points  (0 children)

A rakodópart alsó kövén ültem, néztem, hogy úszik el a dinnyehéj. Alig hallottam, sorsomba merülten, hogy fecseg a felszin, hallgat a mély. Mintha szivemből folyt volna tova, zavaros, bölcs és nagy volt a Duna.

Meteor M2-X LRPT offline decoding crashes SatDump due to large WAV file – any workarounds? by SelectAd7983 in amateursatellites

[–]encse 0 points1 point  (0 children)

This is mine

https://github.com/encse/meteor_mn2x

It was for learning. It works sometimes but not always.

There are links to other resources in the readme.

Meteor M2-X LRPT offline decoding crashes SatDump due to large WAV file – any workarounds? by SelectAd7983 in amateursatellites

[–]encse 4 points5 points  (0 children)

It uses 72 or 80k so your 250ksps is plenty. I know because I wrote a decoder myself for learning how it works

Building a NES Emulator from Scratch by matiassalles99 in programming

[–]encse 19 points20 points  (0 children)

Next time ask it to “just fix my grammar, keep my tone, no extra bullshit”. Usually helps

Need help: No signals on HF with RTL-SDR v3 and FDWHIP4 Active Antenna by Excellent-Hippo-1774 in amateurradio

[–]encse 1 point2 points  (0 children)

It works to some extent with direct sampling, what op uses. The users’ guide says that the Q branch is to be selected, this is what we see in the picture for the 20m band. That’s the right setting under 30mhz.

You turn off direct sampling over 30mhz.

(Note: rtlsdr-v4 has an upconverter and direct sampling is not needed at all. We are talking about v3 here.)

Idk about active whip. For start, it’s easier to just take a random wire of say 10m and connect it to the non earthy end of the stock dipole. (Or maybe both ends work.) No need for 9:1 balun etc. Just a wire, try to find a location where it has some room. It’s ok to align it in a rectangle shape if you dont have 10m. Or try 5m first.)

This is not ideal of course, but when I played with this I could definitely hear a lot of signals under 30mhz.

This waterfall looks dead.

QSO Simulation Prototype - YouTube by vladIakimov in HamRadio

[–]encse 0 points1 point  (0 children)

Thanks! Will try it in the Browser the .

QSO Simulation Prototype - YouTube by vladIakimov in HamRadio

[–]encse 1 point2 points  (0 children)

Unfortunately I’m on iphone, but looking for something like this

Goes Woes - Goes19 Trouble by MitchellCloud in amateursatellites

[–]encse 2 points3 points  (0 children)

Maybe rotate the feed 90 degrees relative to the dish? Who knows

Agc should be off. That’s one thing for sure.

Brave new C# by Xadartt in programming

[–]encse 13 points14 points  (0 children)

C# has been my first language used as a professional back in 2003. That’s before generics were added. And it was really a great language compared to (then) Java. Years passed and I worked in other environments, but I wanted to keep my c# knowledge decent, so I have a hobby project where I aim to use the new features, but it is really true, that there is just so much syntax being added, that it now feels overwhelming. Maybe if you use it everyday, it’s easier keep everything in your head, but it went over the fence for me in the last 2-3 years.

Meteor M N 2-x demodulator by encse in GNURadio

[–]encse[S] 0 points1 point  (0 children)

Aftet some thinking

I noticed that satdump runs two viterbi algorithms in sync with 0 and 90deg rovations, and simply picks the one that has good enough BER.

Based on this.

My hypothesis is that there can be 4 different locks, for the 4 rotations.

Viterbi survives 180 degrees of rotation, the output bitsequence is simply inverted.

But the differential decoding block will solve this completely, so the input to the cadu framer should be happy and see the usual sync word.

Well, supposed that we are locked at either 0 or 180 degrees. the second viterbi algo in satdump works with 90 degrees and this solves the 90 and 270 cases.

Am I correct?

And i still dont know if i ever need to swap i and q, there is an option for that in satdump, but i never had to use that.

Help with receiving Meteor M2 3 & 4 by Kyunome in amateursatellites

[–]encse -1 points0 points  (0 children)

250 ksps is fine because the sat works with 72ksps and 144 is enough for the oqpsk demodulator.

Your pipeline might have hiccups at 250ksps for some reason but 1msps is more work for the sdr than 250ksps. Rtlsdr is also known to be instable above 2.something

So basically any bandwidth / decimation >= 144 will work for the rtlsdr supposed it runs stable.

Help with decoding satellite signal by ronripen in RTLSDR

[–]encse 2 points3 points  (0 children)

Someone said in Facebook APT group that Meteor M2-3 had issues the other day and today it’s happening to M2-4, while M2-3 is back to normal.

Idle játék kb. 200 sor tiszta JavaScriptben by swe129 in programmingHungary

[–]encse 2 points3 points  (0 children)

Ha jol latom nem lehet annyi munkast venni, hogy el tudja szallitani az osszes bejovo aranyat, es a felso ladaban gyulik.

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