I have a SDG 2042X in my lab, but I've also used a lot of Agilent/Keysight Arbs in school that are similarly spec'd, honestly I really prefer my Siglent over the other, more popular brands. They're quality pieces of equipment for really good prices.
The far right blip on the scope was the signal return from your ceiling. It looks to have occurred at roughly 10.2mS meaning the one way trip would be 5.1mS. It looks to be a basement so I think the temperature is a bit cooler than room. Let's say it was 20C and so speed of sound =343.3 m/s. That makes the distance from the face of the transducer to the ceiling 343.3 m/s * 5.1mS or about 1.75 meters (5.74 feet). Assuming your bench is roughly 35" (0.889m) and accounting for the maybe 3 inches from the bottom of the breadboard to the face of the transducer, that makes the ceilings in your basement about 9' high meaning someone sprung for extra high ceilings in the basement (the only way to go for a lab!) Very nice.
Thanks for the detailed review. I work with a high end Rohde & Schwarz arb at work, and it's nice to see how many features are available at the entry level and the performance that entry level equipment is able to achieve.
When we purchased arb a few years back we had 2 arb in our short list, Siglent's 1000X and Tek's AFG 1000. In the end, we bought AFG 1062. The software made all the decision as complex mathematical function can be easily created in Tek's software. On the other hand Siglent's software was pretty basic but if i am not mistaken they had superior hardware at that price range.
Time to receive reflect signal:10.2 ms - 0.1ms (end of burst) Speed of sound in 20 degree Celsius : 223 M/S Distance between table and roof is : 0.0101 x 223 / 2 (send and reelect ) = 1.12615 Meter
As usual this is a great video Shariar !!! I was missing one more thing it there which is measuring the cross talk level between AWG channels. As this generator is capable of outputting high level of the signal, this may be very useful parameter to verify.
My guess is that the last signal added to produce the 'doubled' eye diagram was a clock signal which might leak in from an adjacent trace in the real world.
Very nice review and interesting demo's. Since I make videos myself I know how much work it is. Hats off to you About the transducers. The first bump is crosstalk between them, the further away is reflection via the ceiling. You can calculate the distance to the ceiling with this "sonar" very cool experiment. How is the noise if you isolate the transducers from each other or connect the grounds at the DUTs. Now you have ground loops (if the FG output is earth referenced) If you are looking for ideas, acoustical temperature measurement like Jim Williams did for a application note (if I remember well)
Hi Signal Path. I was thinking, maybe you could make a video focused on RF relays and switching components. It is interesting topic, and it would be nice what is so special about them compared to DC (low frequency) relays.
19:20 wasnt that the other way around? I was under the impression that putting the output mode to 50Ohm scales your Amplitude by 2 while highZ leaves it at what was set.
Terminated in a Hi Z load gives 2x the amplitude of the same signal terminated in a 50 ohm load. This has normally nothing to do with the generator output. That itself does not change. (other then lower at the load due to the lack of reflections) I think here the FG corrects its reading for that. So you do not have to correct it.
Doesn't the spectrum analyzer re-sync the constellation so it remains upright and stable? You mentioned the devices were not synchronized. The whole constellation should have been rotating with a speed of the difference of the two references!
Yes it does. But only once during an acquisition. So if there is drift, or if there is a strong LO signal which is slowly moving away it will eventually cause rotation by the end of the acquisition. VSA does not do phase tracking. Just a one time phase lock.
Very interesting! Thanks! Honestly, you lost me ~1 hour mark when you started to talk about QAM, constellation and symbols. If at some point you could make a video explaining some of that stuff I would greatly appreciate it.
200mhz model price is reasonable. The 600mhz model is overpriced. Be there this is mostly because it is targeting much more professional people. The hardware is certainly the same. I mean hardware is trivial. Fpga, dac, amplifiers and gain control. That is all. Software is okish, but t not the best. I would like to generate arbitrary functions on the device without of. Just enter mathematically formula (using time domain and modulation input), including many building functions and noise or random functions and add many signals together. Main CPU just computes function in fpu, generates 100Mps and uploads it to fpga. So easy.
The signal path in 2020, "Hi, welcome to the signal path", we see a huge wall of gear and a tiny head, far, far away
I have a SDG 2042X in my lab, but I've also used a lot of Agilent/Keysight Arbs in school that are similarly spec'd, honestly I really prefer my Siglent over the other, more popular brands. They're quality pieces of equipment for really good prices.
Prof. Shahrayar Beauty...amazing high quality educational video can not be seen anywhere else...thanks a lot.
Thanks for the such a detailed and an educational video.
I don't understand why 9 people gave thumbs down to this video.
From basic view this looks very well made for value market. If only someone could make a basic RF generator that doesn't cost a million bucks.
The far right blip on the scope was the signal return from your ceiling. It looks to have occurred at roughly 10.2mS meaning the one way trip would be 5.1mS. It looks to be a basement so I think the temperature is a bit cooler than room. Let's say it was 20C and so speed of sound =343.3 m/s. That makes the distance from the face of the transducer to the ceiling 343.3 m/s * 5.1mS or about 1.75 meters (5.74 feet). Assuming your bench is roughly 35" (0.889m) and accounting for the maybe 3 inches from the bottom of the breadboard to the face of the transducer, that makes the ceilings in your basement about 9' high meaning someone sprung for extra high ceilings in the basement (the only way to go for a lab!) Very nice.
Nice. My basement ceiling is indeed pretty tall. :)
Thanks for the detailed review. I work with a high end Rohde & Schwarz arb at work, and it's nice to see how many features are available at the entry level and the performance that entry level equipment is able to achieve.
InstaBlaster
I'm more interested on the the Tektronix scope ahah 😂 finally you will do a review of that!
Anyway good video like always
Great stuff.
Have the 2042x version of this Siglent ARB. Been very happy with it.
When we purchased arb a few years back we had 2 arb in our short list, Siglent's 1000X and Tek's AFG 1000. In the end, we bought AFG 1062. The software made all the decision as complex mathematical function can be easily created in Tek's software. On the other hand Siglent's software was pretty basic but if i am not mistaken they had superior hardware at that price range.
Time to receive reflect signal:10.2 ms - 0.1ms (end of burst)
Speed of sound in 20 degree Celsius : 223 M/S
Distance between table and roof is : 0.0101 x 223 / 2 (send and reelect ) = 1.12615 Meter
As usual this is a great video Shariar !!! I was missing one more thing it there which is measuring the cross talk level between AWG channels. As this generator is capable of outputting high level of the signal, this may be very useful parameter to verify.
I have no idea what this video was about but it sure as heck was cool.
Very nice video.
It seems that we will have a SM200A review soon...;-)
You can't do this to me at 2:30AM, Shahriar!
My guess is that the last signal added to produce the 'doubled' eye diagram was a clock signal which might leak in from an adjacent trace in the real world.
Yes, it was!
Another great review, and educational too. Nice generator for the price.
Very nice review and interesting demo's. Since I make videos myself I know how much work it is. Hats off to you
About the transducers. The first bump is crosstalk between them, the further away is reflection via the ceiling. You can calculate the distance to the ceiling with this "sonar" very cool experiment.
How is the noise if you isolate the transducers from each other or connect the grounds at the DUTs. Now you have ground loops (if the FG output is earth referenced)
If you are looking for ideas, acoustical temperature measurement like Jim Williams did for a application note (if I remember well)
Hi Signal Path. I was thinking, maybe you could make a video focused on RF relays and switching components. It is interesting topic, and it would be nice what is so special about them compared to DC (low frequency) relays.
Yay new video! I live for this. Also; you been working out? Gettin' them arm days in? :3333
Excellent
Great video as always!
Hi Shariar, love your videos. very interesting review
Awesome vid. Thank you
Interesting FPGA inside:)
was wondering why did you changed the scope from Tek to keysight? 😀
Thanks for sharing 😀👍
👍👍
I need to see the inside for longer than that!
Thank You.
Is it a reflection from the roof ?
That's what I was thinking.
Thanks guys.
Yes! It was.
Such an informative video!sir,could you please make a video on Photonic analog-to-digital converter?
I saw "sir" and "could you...", I swear I thought you were going to ask for the code and write your email... But you did not :/
so true :)
Thank you -)
19:20 wasnt that the other way around? I was under the impression that putting the output mode to 50Ohm scales your Amplitude by 2 while highZ leaves it at what was set.
Terminated in a Hi Z load gives 2x the amplitude of the same signal terminated in a 50 ohm load. This has normally nothing to do with the generator output. That itself does not change. (other then lower at the load due to the lack of reflections) I think here the FG corrects its reading for that. So you do not have to correct it.
@35:38 shows that your ceiling is 1.72 meter away from your desk. Is that true ?
Hi there can you please tell me the name of the iq modulator device that you used to mix the lo with the Siglent?
you can hear the 25kHz bursts if you turn up your volume while it's running (: the ultrasound must be reaching his mic
Doesn't the spectrum analyzer re-sync the constellation so it remains upright and stable? You mentioned the devices were not synchronized. The whole constellation should have been rotating with a speed of the difference of the two references!
Yes it does. But only once during an acquisition. So if there is drift, or if there is a strong LO signal which is slowly moving away it will eventually cause rotation by the end of the acquisition. VSA does not do phase tracking. Just a one time phase lock.
This FPGA is most likely Xilinx Kintex-7 XC7K70T in 676-BBGA package
Interesting that it can accept 400hz AC power, presumably for aircraft.
greencomputerfan yeah. Definitely to be powered on board a plane.
ok but still what is that FPGA inside ?
looks like an Intel/Altera
Have never seen an FPGA like that, it looks exactly like a ordinary processor.
doesnt that scopes fft functionality not have a bandpass filter feature?
Yes, you can center it as you wish.
“Amplifier”? m.ruclips.net/video/_2LcpH_JxYM/видео.html
What are some amps that could be used with this AWG to boost output?
You've got a really high ceiling. ~3.5m from your table!
Shouldn't it be half that? The total distance the sound travels is 3.5 meters, but it has to travel up to the ceiling and then return.
Thanks jan386, you're absolutely correct. It should be half. I made a careless mistake.
The CPU is Intel based, looks like Intel Atom or something like that. Maybe even i3 or i5.
Very interesting! Thanks!
Honestly, you lost me ~1 hour mark when you started to talk about QAM, constellation and symbols. If at some point you could make a video explaining some of that stuff I would greatly appreciate it.
Actually, you did explain some of this stuff in video #10, starting at minute 8:10s. Thanks again!
Do you use this equipment for something different than making video about it xD?
Who down-votes TSP and for what reason!? Reveal yourselves cretins!
Some people down votes everything. They would even down vote Mother Teresa. Morons...
There is a good reason to downwote M.T. - research it. Different with TSP ;)
Plenty valid reasons to downvote M.T.
This video? I see none.
Today I learned some things! wow.
It’s a .wav :O
200mhz model price is reasonable. The 600mhz model is overpriced. Be there this is mostly because it is targeting much more professional people. The hardware is certainly the same. I mean hardware is trivial. Fpga, dac, amplifiers and gain control. That is all. Software is okish, but t not the best. I would like to generate arbitrary functions on the device without of. Just enter mathematically formula (using time domain and modulation input), including many building functions and noise or random functions and add many signals together. Main CPU just computes function in fpu, generates 100Mps and uploads it to fpga. So easy.