Awesome on the explanation of block diagram. This will be my Friday night movie! I'll watch it many many times! Thanks

4:04 here. I just wanted to go sleep. But no, time for tea, apple pie and signalpath.:)

@Thesignalpath

8 жыл бұрын

+Toni T800 Hehe... Well, prepare yourself, this is a very technical video. :)

Excellent video and certainly pushed my RF knowledge to the limit and beyond. I always learn something from you each time I watch, many thanks!

23.38, somebody really love this board :D Great video! really interesting ,thank you!

As usual, fantastic! Thank you. All of these videos send me directly into research and learning mode so that I can go back and see if I understand better. This video bites off a big chunk of information which will keep me busy.

Fantasic to see they provided you the boards. Thanks for another great video.

Definately one of your best videos ever.

Another fantastic video, thanks Shahriar!

Note the time and date on the SA on-screen clock. From early Christmas day morning, to afternoon. :D Thank you for the seasonal present Shahriar! I hope Keysight or someone can loan you a VNA some time, there is definitely a need for a thorough walk-through of one of those.

@InXLsisDeo

8 жыл бұрын

+Zadster If Rohde & Schwartz aren't doing this, they are missing out.

Amazing video as always!

Very comprehensive video. Well done. Thank you

Wow very impressive! It looks like Santa was very good to you this year. I loved the experiments, very good review and explanation. I look forward to your next video. Thank you.

wow that was a lot of info to take in awesome and way above my understanding of RF

Awesome video, thanks!

Great video with fantastic experiments. The capabilities of the EXA combined with an EXG/MXG are truly incredible; I had no idea it was so versatile in measurement capabilities! (With $$$ software options anyway...)

Awesome tutorial! :)

Very well done.

Hey, your intro finally isn't a camera pointed at a LCD!

@Thesignalpath

8 жыл бұрын

+Connor Wolf :)

@owieccyt

8 жыл бұрын

+Connor Wolf It was a CRT screen connected to a VHS system. Nice to see a better quality.

@AureliusR

8 жыл бұрын

+The Signal Path Blog 4:45AM On Dec 25th?! Good to see I'm not the only one with crazy sleeping habits, especially when it comes to electronics :)

Mind blowing stuff.....

@InXLsisDeo

8 жыл бұрын

+Enzaie My brains are all over the place.

GREAT VIDEO! I used to work with a lot of the (HP/Agilent/Keysight) Vector Network Analyses and was repeatedly told not to "Have a look inside of them". Maybe you could tear down a VNA and explain the design and operation?

Great!

Great video as always - just bought the VSG25A as result - the question with the error vector not being flat signal as you ask, maybe comes from the restricted length o the pseudeo rnd sequence of the used bitpattern from teh VSG ?

Micron-scale through-silicon vias have been used in the past by HP to make grayscale images on silicon, and these images were once quite common in their larger chips. It was a technique unique to HP and probably will never be seen again.

Fantastic, as always. Is the "obvious" reason for having the separate power supplies because you don't want to modulate the PLL output of the transmitter with noise from the PA?

Hello very cool

👍👍

Are the LO filters embedded/stripline to permit the dielectric to be the same on both sides of the filter trace? That should improve the performance of the filters vs microstrip filters.

Shahriar did I get you right, the upconversion is performed for to be able to use a microwave cavity filter? The heart shape on the board is really nice)) I love it!) Incredible video, thank you so much!

I have a question about QAM demodulation. I understand QAM is decoded by the IQ signal being at a specific code point on every "tick" of the symbol clock. I also understand that when you down-convert a single tone to IQ baseband, it will ideally have a fixed vector. However, if the tone is even a fraction of a Hz off, the vector will rotate. When decoding QAM, how does the decoder prevent rotation of the constellation due to frequency mismatches? Or, am I completely misunderstanding how QAM demodulation works?

@Thesignalpath

8 жыл бұрын

+Mark McGough No, you are correct. The constellation will rotate if there is any frequency offset, furthermore it will be tilted if there is a phase offset. Both of those are surely present. However, the clock and data recover algorithms of the VSA software corrects for that.

What a great video, what a way to end 2015, you really did great things for this channel the EE student, EE hobbyist and up and coming RF enthusiast (such as myself). I would like to see better lightning in 2016. :)

I think at 25:00 the circuit should be 5.1G prefilter and LNA. Lowband mixer should be in the sealed box.

This must be a response video for the haters complaining about him doing Arduino stuff. :) Very interesting episode, thanks.

@Thesignalpath

8 жыл бұрын

I really don't know why they didn't like the IoT video. I thought showing the block diagram of the SoC and actually getting it to work with your cell phone was pretty fun!

Ever got the hands on a R&S FSW? Did you like the UI?

is it because the instrument is aplying fft to the displayed signal?

Can someone explain briefly why it's the output matching network and not the input matching network which caused the dip in the gain at around 6Ghz (1:04:21)

Hi, How much EVM should change if there is only 1 degree of phase error in Quadrature signal coming from DAC/ADC? Is there any simple formula to check effect of I.Q imbalance on EVM without knowing any other information?

I have been thinking about getting one of these. May I can find one real cheap on ebay. Thumbs up.

Hello Shariar I am a bachelor software engineer who does some EE and radio ham in its free time, Is their a spectrum analyzer in the 500 dollar range second handed or old both ofcourse for this price are not a problem.

So how do you mix 34.4 to 44GHz to 322.5MHz with an LO that has to pass a 14GHz low pass filter?

@Thesignalpath

8 жыл бұрын

It is a sub-harmonic filter.

why the hell do i feel compelled to look at these videos since it's completely outside of my processional and monetary scope?!?

@simonfitch1120

8 жыл бұрын

+maxsnts Same for me. Maybe some of what he says will soak in and stay! Every 2 minutes or so he says something that I have to pause and look up. I'll never use any of this information, but I find it fascinating, just fascinating.

1.5 hour nerdgasm

How do you afford all of that gear? Are you sponsored or something?

@warrentb1

8 жыл бұрын

+totaldude155 If I remember correctly Shahriar is a practicing EE at Bell Labs, so it is probably a combination of intense interest and great deals from manufacturers due to his professional position (and youtube channel?). I can't remember him mentioning being married either :)

@jaa93997

8 жыл бұрын

(looks at the price tag)(geek engineer soul dies a little more)

@yaghiyahbrenner8902

8 жыл бұрын

+W Bailey un-married => afford better equipment, un-married with no-kids => expensive equipment. he does have a girlfriend in the masters EE space, so the general rule doesn't apply. :)

@InXLsisDeo

8 жыл бұрын

+totaldude155 +W Bailey I believe he had a good price on the Keysight/Tektronix scope indeed because of his position at Bell Labs, but mostly, except for the chinese brands (Rigol, Siglent) that he can afford, I believe he buys non working equipments from eBay and repairs them. Non-working equipments can be had for a fraction of the price of used equipments, which are themselves several times cheaper than new equipments. That's how you can get for a few hundreds $ equipment that used to cost several grands when new. But then you must be pretty confident that you can repair most of these complex electronics, which obviously isn't a given.

No doubt an amazing piece of gear, but am I the only one who feels Keysight should really do something about their ugly UIs? I understand it may seem unimportant but R&S instruments have much more tastefully designed UIs. Even my old FSEA from the late 90s looks more modern.

Ugh why do all these high end instruments have to use Windows? it would be much better if they used embedded Linux - faster boot, no danger of viruses etc.