015 QO-100 Satellite Receiving Technology And Explanation of a PLL (Part 3)
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- Опубліковано 22 лип 2024
- Cross-posted video from my main channel (Because it is HAM related)
When we started our bonus project to communicate via the geostationary satellite QO-100, we created a to-do list:
- A high power 2.4GHz transmitter
- A sensitive receiver for 10GHz
- And an internet connection to the Adalm Pluto
In the last video, we built a prototype for the transmitter. We just need an antenna to complete the task. So this week, we will make a cheap first version of the receiver. And hopefully, listen to the first signals from space. And you will learn “PLL.”
Newest product links in this video: • 020 QO-100 Update: Fri...
Links (also from other QO-100 videos:
Adalm Pluto SDR Receiver: amzn.to/3fSQPxk
PLL LNBs: www.passion-radio.com/satelli...
Green LNB (good for external clock modification): ebay.to/2WV3reR
Pre-amplifier: s.click.aliexpress.com/e/_dUe...
20W amplifier: s.click.aliexpress.com/e/_dWL...
8W amplifier: s.click.aliexpress.com/e/_dZt... or amzn.to/2SKoBLv
Power Meter: s.click.aliexpress.com/e/_Bfg... or amzn.to/35FNdtV
SMA torque wrench: s.click.aliexpress.com/e/_d7o... or amzn.to/2zeEG5b
50W Attenuator (not tested): s.click.aliexpress.com/e/_dZA...
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Very informative and love the way all the information is broken down for us to understand…
Glad it was helpful!
Enjoying this series. Learning a lot. Thanks
Glad you enjoy it!
Great series.
Thank you!
Such a PLL master class... Thanks Andreas.
PLL is a very important thing, I think...
Very good explanation of PLLs. Thank you.
Glad you liked it
Thanks so much for this info
You are welcome!
Waw, cool stuff ! I always loved the CD4xxx series, so much fun to work with !
True. They still are available.
Nice, a good simple explanation for the uninitiated.
Glad you think so!
Very useful information
Thank you
♥
Welcome 😊
A clear video indeed. Thanks for breaking down the details for us the lazy.
Glad it was helpful!
Good to see the CD4046 (early 1970s vintage, I think) is still put to use!
These functions probably never die!
Hello. Thank You for this nice video. Good explanation and interesting also for ones already active on QO-100. 73!
You are welcome! Maybe I once make a QO-100 meeting with some viewers...
Thank you! vy73, Dietmar, DL4HAO :)
You are welcome! 73
What always amazed me (and I never really understood) about a PLL is how both frequencies at the comparator get in phase-sync. The vco can adjust frequency as much as it wants, if it is not in sync with the clock of the local oscillator, the comparator will always see a difference and the loop will never "lock". Cool concept though. My first encounters with it date from over 40years ago when I was tinkering with my CB transceiver (before I got my ham license)
The VOC always changes it’s frequency if not locked. Otherwise it would be as you write.
I am here sir! ;)
Thanks for coming!
Morning Andreas, I hope you are well, mate. I loved fixing PLL s in the day with audio noise.
I am ok. Winter goes away and spring comes here...
@HB9BLA Wireless Autumn is on it way here. Time for a glass house, mate. Gold hunting tomorrow.
Sehr schönes Video - vor allem die PLL Erklärung. Bin bereits QRV per QO-100 ein tolles Projekt wie ich finde. Gruß auf Franken - DG5NDK
Ich finde ebenfalls dass wir extrem privilegiert sind ein so teures "Werkzeug" zu benutzen.
Hello Andreas, dose it matter if I supply 12v from a Clean Battery or from a switching power supply? Thank you & 73!
If your power supply is clean, it does not matter. I use this test to find out if my power supplies are clean: Compare it with a battery.
I once made a video about cheap power supplies on my first channel. Maybe I cross-post it here.
I sure wish the footprint of this satellite was viewable from North America.
Andreas, I would love a deep dive on PLL design sometime. I’ve made them work but only through trial and error. I want to know the math behind calculating the corner frequency of the loop filter.
You maybe find a more specialized channel for the PLL topic. I do not plan to cover it here. And maybe A satellite operator has mercy with you and gives you access to a spare transponder, too.
What about building the receive part of a ZERO IF transceiver and use a Raspberry Pi IV to demodulate AM and FM signals, if you only want FM then what about getting an old CYBERNET 928 CB transceiver
We do SSB on the QO-100 because it is more efficient.
Are there LNBs for the HF (Amateur) bands ?
They aren’t needed because HF = 3-30 MHz and can be received directly by a low cost SDR, eg RTL-SDR for a few dollars.
And on the lower bands we often need attenuators rather than amplifiers because of strong signals...
The Ham Radio with the Swiss Accent rocks! Very interesting. Do you know any good online electronics course? To get more deeply into the theories behind this kind of circuits.
Unfortunately, I do not know such a course. I usually select a project to learn
@@HB9BLA Thanks for the answer. Yes, that way is the best. 73!
show the connection from lnb to sdr receiver
Just a coax cable. with a Bias-T to feed the 12 volts for the LNB
@@HB9BLA great easy i will try too
:-)
:-)