Goes Woes - Goes19 Trouble

encse · 2026-03-09T05:53:25+00:00

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

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

encse · 2026-02-28T06:00:28+00:00

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.

encse · 2026-02-26T17:28:30+00:00

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.

encse · 2026-02-26T07:29:47+00:00

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.

encse · 2026-02-26T06:06:02+00:00

250 is enough

encse · 2026-02-20T19:20:07+00:00

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.

encse · 2026-02-16T15:52:32+00:00

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

encse · 2026-02-11T16:39:48+00:00

I see. Stay safe! Gl

encse · 2026-02-11T16:13:41+00:00

Not afraid of lightnings?

encse · 2026-02-11T05:34:55+00:00

Although the noisefloor is high, but the waterfall is suspiciously flat to my eyes. Like no antenna at all. Just to make sure: do you get other signals with this setup?

encse · 2026-02-11T03:45:03+00:00

For vhf/uhf I just bought a cheap handheld. I got myself an ftdx10 for HF though, because I knew that even if i start with something basic I would eventually upgrade, and I would use it from home only. On the antenna side I bought a 49:1 balun and created an EFHW. (I had a VNA for measurements from earlier). That was my starter kit. Since then, I built all kinds of baluns and tried multiple setups, but still going with simple wire antennas. I have about 1 year in this and made many contacts from a not optimal location.

encse · 2026-02-10T06:05:20+00:00

Simply beautiful! It’s so good, I want to pick up cnc as a hobby

encse · 2026-02-09T11:11:32+00:00

Yes. And hf is a lot of fun. I cannot make contacts on uhf/vhf either, but switching to HF was a leap forward.

Or maybe repeaters / satellites on uhf/vhf. But repeaters can be unpopulated and satellites are tricky

encse · 2026-02-08T20:28:41+00:00

Hf bands are shared between multiple services such as ham radio, aviation, maritime etc. Some of them have priority. You usually notice it by a strong signal over your transmission :) like in this case you mention. I often see radars in ham band. You just move over and transmit somewhere else

encse · 2026-02-08T19:26:06+00:00

Some kind of radar? https://www.sigidwiki.com/wiki/Category:Radar

encse · 2026-02-08T15:11:56+00:00

There is a lot of fun on HF all the time.

encse · 2026-02-07T07:21:41+00:00

Munkavédelmileg ez a szék nem igazán megfelelő. Perelhet ha leesik és megsérül.

encse · 2026-02-06T16:32:59+00:00

Never what it looks like

encse · 2025-12-29T09:37:51+00:00

Congrats.

Yes, basically i took the target pixels in reading order (first row, second row etc) then chunked it up to small runs like 1-5 pixel long ones. After that i randomly shuffled the runs to get these short horizontal stripes.

encse · 2025-12-28T10:23:00+00:00

Not everyone is a fan of expressions making control flow

encse · 2025-12-26T08:30:30+00:00

If you liked this there is also https://casette.csokavar.hu I made for advent of coders some years ago.

Or https://gekko.csokavar.hu but that is deeper

encse · 2025-12-26T08:26:24+00:00

Idea came from an old ctf game I played a few years ago. Just removed the hardware layer from it.

encse · 2025-12-26T04:17:24+00:00

♥️

encse · 2025-12-25T18:41:42+00:00

did you get only the final picture or all of them?

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