man i need help with this trx-duo stuff are there forums or telegram about it i'm not finding much

Another good video, thanks. Have to ask, I can subscribe to your channel but I can't switch on notifications. Is that a deliberate choice you made to setup your channel that way?

Great channel. Lots of useful bits. Subscribed. Cheers ...

The most recent red pitaya notes image allows the trx-duo to utilize full 16 bit?

Thank you professor doctor moonshine! Which pre-amp would you use with this unit? I do have a cheap LNA, also from Ali that says TQP3M9037 on it, have no idea how good they are

I've got both the TRX Duo and 14 bit Pitaya and used both with Thetis. Do you have any recommendations on using GNU radio on a Windows laptop? I would like to experiment more

Hi! What software do you use to draw pictures on the spectrum ? Thanks. 73 !

Nobody ever explains" why do we want to do this, to generate I and Q signals?" HOW do we use these to eliminate a Sideband?? What is the complete process?

Where did you find the driver? I'm still looking.

Have you found the driver? I'm still looking.

Wow, this was exactly what I was looking for, for the homodyne receivers.The reason behind why we use 2 orthogonal signals explained beautifully!

Hi, do you have a video explaining how the set up of SDR is coupled with power amplifier and antenna for transmission? I have been looking for videos but never found any. The way you explain is really good

I have one of these. They are excellent for what they can do vs other sdrs. Ie not a complete replacement for everything else. But a tool to be used along side them. Seeing the whole hf spectrum at once or monitoring all the ham bands at once is amazing. I have ethernet over power in my house and its instantly visable. To see the same on a tinysa you have to put it into max hold mode and wait 10 minutes. Where as the rx888 mk2 shows the entire instantaneous spectrum. Yes a lpf is a good idea.. but i only have ham band resonant antennas and there usnt much local transmissions 32Mhz to at least 70ish Mhz. Ive not seen any alias of the local FM radio broadcast stations. Like others have said there is no 32mhz lpf. Only a 64mhz one which isn't the greatest. All the considered im very happy with it. I was very interested in ionosondes transmitters at the time i bought it and of course it works really well for tracking them across the whole hf spectrum. Some i believe are military. Regards VK6MIK

If I understand correctly, for the upper convertor, we need to get cos(a+b) out of the mixer. All we need to do is use a IF filter at high frequency. Therefore, the only difference between down convertor and upper convertor is the IF filter passing frequencies.

I need help, I got AM Transmitter but the connector for the trasmitter is 9 ~ 12v, which power supply will you recommend me, the 9v or 12v?

BRUTAL dancing pumpkin GIF wideband noise OBLITERATES modern military radar

What difference does it make to have sensitivity down to -145 dBm, when HF is any way full of noise?

This video rules. Forgive a newbie- X axis is Frequency, Y axis is time domain waterfall, and color gradient is SNR?

Nice tutorial. Thanks!

Funny guy 😂

Nice tutorial

The legend says that bus 25 is still trying to pull over to take a shiyat. Real bad.

Excellent tutorial!!!!

so any reasonably priced TX capable SDR that's not Zero-IF?

thank you very much

intresting

thank you

thank you

thank you for shring

I've watched a couple videos on IF to understand this and finally someone said the local oscillator frequency changes. Light bulb on...thank you!

How did you generate the I/Q wav files?

Great video, but I want to point out that there is a little mistake. The nyquist zones should be 0 - 1/2fs, 1/2fs - fs , fs - 1.5fs ..... In your video, the 2nd nyquist zone is beetwen 1/2fs to 1.5fs. Lets take 99MHZ and 101MHZ, both of them will look like 1MHZ from the adc output, which means we can't tell the difference beetwen them. If we try to use a filter in the range of your 2nd nyquist, then we cant tell the first half from the second half

Hello, I have a project to design FM receiver and transmitter to send one or more images. Do you have any ideas on how to do this? I would be really grateful if you could help.

that must be magic singin wire

Hilarious and informative !

I like Rush, so I stopped at 1:00 and rated a thumbs down.

Solid explanation. Brings concept clear.

what happened to stonk market vid?

The receiver block diagram presented @4:55 shows an ADC between the IF stage and the DDC block. I thought the output of an ADC was a binary value (composed of 1's and 0'S) that represented the level of the analog signal at the sampling time. How can such a binary representation of the signal level be used by the DDC? Thank you!

Why is it cosine and not sine?

Why is it called a multiplier? It's the sum and difference between lo and rf.

I like the PFB stuff in Matlab. Is there somewhere I can get example code for this? Some years I got a similar thing working in gnuradio using a hackrf(all I can afford) and an rtl dongle to receive on another laptop. It was adapted from the work in this paper : Designing Anaylsis and Synthesis Filterbanks in GNU Radio Thomas W. Rondeau Timothy J.O'Shea It did work amazingly but was pretty unstable.

Thanks!

So basically it's an up conversion to a comercial AM broadcast frequency of an already AM signal but at lower frequency ?

good

I really liked the part where you told about how the old radio model worked and what was the flaw in it. Such connection is very good to understand I think. Thank you!

Realised all my received bits were flipped when I transmit with the TX code, so did this on the RX code: det(det <= thres) = 0; det(det > thres) = 1; %det(det <= thres) = 1; %det(det > thres) = 0; Now everything I transmit decodes fine, Was that a sneaky accidental on purpose error to test us? :)

Hi Union Bobby, hope you're enjoying nascar. Failed to decode it without looking at your ingeneous code. With your code managed one good decode off a relatively poor recording. All other attempts failed, Tried a slightly different synch method and also tried another txt file with the original code. Will keep playing around with it sir.

0:58 when you say "you can't use a crystal detector"... do you mean that dsb-sc doesn't produce that constant carrier frequency at the receiver side? In AM is the phase of that constant carrier frequency used on the reciever side to demodulate the signal?

That’s a real problem here in WV.