Connecting a Ku-band LNB to an SDR || Satellite reception pt.6
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- Опубликовано: 9 янв 2023
- A slightly rushed video outlining how an LNB works and how it can be connected to an SDR receiver.
Links:
My website and other social media - sgcderek.github.io/ 
Наука
Some of the NA sats had open internet traffic on them packaged in standard transport streams. I captured a few streams off a transponder years ago with a linux box and a dvb card. Tried to play it with VLC and nothing, so I popped it into a few transport stream parsers and things looked weird , dumped it, opened up some of the 188 byte packets with a hex editor and saw HTML. Someone was looking at a webpage that sold supplies for firefighting. It was interesting to see especially packed in something more designed for TV use.
Leave it to Hughes… 😂
I played with a program called fake ftp on DBV-S cards kiss and skystar back in 2002 ish many years . on linux . back then with small hard drive. tapping random data from satellite
Interesting stuff man. I used to hunt for satellite truck broadcastings on various satellites. I had an INVACOM QPH-031 Quad Polar LNB which handled both circular and linear signals, hooked to a simple FTA receiver with a DiSEqC Motor and switch -- so I wouldn't have to have multiple dishes nor manually move the dish. Of course that was not for amateur radio purposes and back then there were no SDR radios. Still, I liked your idea. Subscribed.
I know what you mean, looking for backhaul feeds does sound interesting, but also very time consuming and probably wouldn't make for good youtube content due to copyright lol
This is something I want to try, on Ku and C-bands but hopefully in the future also Ka
Konečne super český kanál (nejaký čech) dobré video :)
This is absolutely fascinating!
Thanks for a very interesting video.
I also try to receive Starlink Signal using LNB+USRP in Australia. However, I can just see the signal on my screen for just several seconds, and I need to wait a lot of time. Could you please tell me what is your sample rate and RX Gain?
Super video!
Nice video!
neat, something new to check out
interesting, keep em coming :-)
Nice video. I'll probably put something together to monitor Q0100. For TX on QO100 well that's going to be a bit of saving up.
Hopefully I'll have a video about some uplink setup too in the future. Already did some "successful" experiments with a cheap hackrf clone, but its power output without a proper amplifier is so low that it barely made it with a 2.5m dish
Good job . Thank You
Can i use two port LNB, from one port can I directly give 13V to 18V and from other I can get signal to SDR by directly connecting with coaxial cable?
That may depend on the LNB, but if you're gonna try make sure to check with a voltmeter that the other port isn't backfeeding those 13-18 Volts into your SDR. The safest option is an external bias-tee where you have a DC isolation capacitor on the SDR input
Hello! What can one do to get the video signal faster? I mean to make sure that the video sent thought satellite is getting the fastest way possible to a monitor. Thanks!
Reverse the power supply polarity. The choke is the polarity diodes, so if you already know what your polarity is on the power supply, just hook it up backwards to ensure maximum performance.
Are you czech per chance?
Nice video
Can you decode or watch the channels as well ?
I mean yeah... just not with an SDR. Any cheap satellite tuner will do better
Have a SDR Play RSP DX for DATV Reception with SDR Angel Software!
Covers 1 Khz, to 2 GHz,
Hello, I also set up a receiver by USRP, LNB and power injector according to your article. Because my LNB's OF is 9750MHz, so I set to observe 1575MHz（11350-9750）in Gnu-radio. Everything is fine but I still can't receive Starlink signals. I 'm thinking maybe the satellites don't transmit beacon all the time about which I'm not sure. So what do you think of that? I'm thinking whether I need to but a Starlink User terminal set up beside my whole receiver devices to keep the satellites transmit signal. And according to your article, you receive signals successfully without doing that. Can you give me some advice? Really Thanks.
Hi, it seems like the satellites indeed transmit a lot less frequently now. Depending on where you are located it may take some time until you see some of their signals. Someone in my Discord server who is from the US tried recently and still received plenty of them.
@@dereksgc You mean I don't need to set a user terminal to make sure that satellites keeping transmitting signal ? I need to observe a low frequency? But where I can find the information about frequency related to my location? Can you give me some advice? Thanks.
@@rangowang9432 You do not, the frequency of the beacons is the same worldwide (11325 MHz).
@@dereksgc Thanks, so I still focus on 11.325., and I have to buy a Starlink User terminal. I guess you can receive the signal even without setting a User terminal by side because there were someone was using that nearby you.
@@rangowang9432 I do not believe you need to have a terminal. I live in an area with great cell and fiber coverage, no people here are using Starlink
How to increase ku band satellite signal....
Assuming you have any semi-decent LNB, the signal strength will depend almost entirely on your dish size. There's a few things you can do to maximize performance like making sure your LNB polarization matches what you are receiving, but that will only result in a couple dB improvement max
Is there also a cheap way for 24 ghz?
you can get cheap 20 GHz saorsat LNBs, but I'm not aware of anything affordable that could do 24 ghz out of the box
Good ... better... best..... nice pic sir ji ❤❤❤❤❤❤
I am impossible 1760 mhz max how get 11 GHz!?
If you have a working LNB with a 9750 MHz oscillator connected, then if your SDR is tuned to 1760 MHz it is actually receiving 11510 MHz
(1760 + 9750 = 11510)
Interesting. Am I the only one that saw bigfoot ?