#160

[@MarcelHuguenin]

Hey Tony, net je video gekeken. Kan me voorstellen dat je daar een aantal uurtjes plezier mee hebt gehad. Aardig overzicht heb je gegeven. Wat maken ze toch een mooie apparaten om van te kwijlen tegenwoordig 🤪Kan me ook goed voorstellen dat ie op je lijstje staat om aan te schaffen, nog even doorsparen dus 😉 Vergat nog te melden dat ik mijn scope (Uni-T UPO2104E) ook bij Eleshop heb gekocht.

[@TonyAlbus]

Hallo Marcel, dank je, ja erg gaaf ding, jammer dat ie weer terug moet... wel top dat ik er even mee mocht spelen. Ja leuke club, nette prijzen en super snel geleverd.. heb mijn Siglent scope en TTi counter en Owon DMM en desoldeer daar ook vandaan,.

[@mostlypostie1]

Your videos continue to cost me money Tony! My SSA3021X Plus is in the mail now. 😂 It was interesting that your Feeltech didn't like the sine input... I have the same unit (more money spent because of you haha) with the external ref input mod, and mine works fine on a sine wave...

[@TonyAlbus]

Yes soory abou that.. great choice btw.. i love it!

[@ernestb.2377]

Siglent does make some very nice equipment at affordable prices!

[@TonyAlbus]

Yes i love mine... its just so easy to operate too.

[@Manticore1960]

When comparing the Chinese sig gen to the HP on sine wave, why didn't you compare them at the same signal level? The cheap one was set to 1v rms (+13dBm) & the HP to 5v rms (+27dBm). Does the HP still show those harmonics when the level is reduced to 1v rms?

[@TonyAlbus]

Hi, interesting question, but i did not think of it, as is was not a compair video for those 2 generators, but an hands-on of the SA.

[@douglasjackson1998]

Don't be alarmed by the presence of the odd harmonics when looking at a square wave. It's not an indication of the quality of the signal, or the source. The very definition of a square wave is that it is the sum of an infinite number of odd harmonics of the fundamental. To the contrary, if you look and see the higher-order harmonics are missing, it's an indication of a degraded quality square wave. The sharpness of it's edges are rounded off (filtered out). To visualize the result of filtering, think about your BPF. All of the higher-order harmonics of the input square wave are being removed, leaving just the fundamental, in the form of a pure sine wave) The extra harmonics on the sine wave from the HP indicate there's a little extra something mixed in, besides a pure sine wave. Likely it's some compression of the peaks of the sine signal. Its not evident to the eye that the sine is clipped, but the analyzer sees it. One or more of the stages of amplification of the sine is being compressed a bit. An extreme case of clipping would approach a square wave on the o'scope, and would show lots of extra odd harmonics in the frequency domain. If you backed off the amplitude of the output,, you might see those harmonics begin to disappear. That was a great demo. I hope you get to have one of those of your own one day. Mine is right in front of me.

[@TonyAlbus]

Thank you Douglas! very clear explaination, very good! .. i indeed fell in love with it, and made a deal, i kept it . :))

[@ernestb.2377]

I notice every time also the even harmonics in between, that seamed not to follow the '1/N decay rule' of the odd harmonics. Any idea where those are coming from?

[@douglasjackson1998]

@@ernestb.2377 Have you considered they may not be even multiples of 10 MHz, but are multiples of half the frequency of the fundamental? So 15,25,35, etc are all multiples of 5 MHz. (but so are 20,30,40,50,etc. multiples of 5, as well as 10). I'm not sure. I think it would take someone 1.5 times or 2.5 times as smart as me to tell us. It's fun to look at all of the outputs of the waveform generator (triangles, stairsteps, ramps, cardiacs, etc) in the frequency domain.

[@ernestb.2377]

​@@douglasjackson1998 Not sure I qualify either for one of those (1.5 or 2.5x) but the signals I have seen were quite right in the middle of the even harmonics (as I could spot it with my detrimental 51 yrs old vision). So none of those 15, 25, 35... but rather 20, 40, 60, 80 ... etc. The reason I made a comment is that I have seen those earlier (different place, people, time, equipment...) and have never stood still to understand where those come from, as we probably all know where those expected even harmonics are coming from...

[@dist67]

Bedankt voor de video Tony. Ik was sinds de publicatie van jouw vide, aan het wachten op een prijsverlaging, en die is er nu op 1/11/2022 gekomen. Dan bij Eleshop gekocht. Vraagje: kan je een kort overzicht geven van de accessoires die nutig zijn voor een spectrum analyzer? DC block, attenuator, ... . Misschien een ideetje voor een korte video 😛 Bedankt

[@TonyAlbus]

Ja super ding, gefeliciteerd! ... DC block heeft ie al als ik het goed heb.. ja kan naar mijn video kijken van de RF tab. ooh ik zie dat die ook indeze video al zit... nou dat dus :) kzbin.info/www/bejne/sKK5YZSIqcyWZ8U

[@dist67]

@@TonyAlbus Bedankt!

[@jorgerivera5963]

Thank for sharing, where did you get the antenna?, I also want to try FM broadcast

[@TonyAlbus]

Thank you, i have added the antenna item links to the description also.

[@robinmoseley766]

did you expand it to 3.2GHz.. I did on mine.. it works very well.

[@TonyAlbus]

Yes i would like to do that... any tips?

[@mikebloodworth9258]

Hi Tony, great review and quite impressive. I was wondering what the real time display update speed is like if the frequency from a generator is varied to the input of the Siglent.. The Rigol is quite poor but the Owon is very good. Wondering about your Siglent. Also what extra features does the Plus model have to the standard model. i.e Power/Bandwidth measurement.

[@TonyAlbus]

Hallo Mike, I don't have the other brands, but i picked this one because of its sensitivity big screen and the Plus has touchscreen and web control. i am a happy man with this choice. for more specs i think better brows the internet and compare to points that you think are important for you. Also the Siglent can be upgraded with a license to 3.2 GHz

[@ernestb.2377]

Hi Tony. Did you already "upgraded" this one? Possibly to SVA? Greetz

[@TonyAlbus]

Hi Ernest, yes i did the license code update, so full options and 3.2 GHz but will not do the SVA until i understand better and why risk it if i do not even use my NanoVNA that much. (like i ever go above 2.1 GHz) :))

[@ernestb.2377]

Hi @@TonyAlbus . Yes, that's why I ask about your experience. You don't want to brick it of course. Those instruments are not cheap to play with too much 😁 I have nanoVNA H4 at this moment, tinySA ultra, RSP1A and old Tek 2712. So I think enough for now, but those modern SA or VNA are very nice 🙂 but if you want more BW the price goes quite high regarding "hobby/education" use.

[@TonyAlbus]

@@ernestb.2377 Yes agree i think twice before i do things like that :) keep an eye also on UNI-T they now also have Spectrum analyzers, i hope to borrow one soon and check it out.

[@ernestb.2377]

@@TonyAlbus Thanks for the tip on UNI-T. I see indeed there are serious players out there 😀 fighting for the same market share, the "fanatic-hobby-users segment". I read the spec of UNI-T UTS1032T and it looks very good. Comparable OWON looks also very good, and it's TG goes lower to 100kHz (UNI-T start at 10MHz). I see this model UNI-T is now discounted a lot at Eleshop. Is says Real-Time SA but I doubt that is the case. Maybe they have some part done with FFT (as OWON also does). That speeds things up. Anyway it all looks too tempting 😆

[@microreniassance2929]

Have you ever seen the frequency of the peak change by around 50Hz depending on which span you are on. I found that a peak from a signal generator 1Vpp at 50.75KHz will appear at 50.75 KHz on the SA or 50.803KHz when I change to a different span, maybe 10 0r 100HZ different. The span and peak frequency change is consistent but where the shift/error happens seems associated with a random span distance. Have you ever seen anything like this? Can you reproduce this? Can you explain to me why it does this?? Thanks again for a great video. Anyone else?

[@TonyAlbus]

Hi, i have not noticed, but i am not a very advanced user.. and i use mine on external reference, maybe that is also a difference.

[@Stephen_Heathcote]

Nice review and analyser :)

[@TonyAlbus]

Thank you Stephen, yes i enjoyed playing with it a lot... now i need to send it back :(

[@vizkoze]

That's an expensive radio 😊. Nice experiments. Nice to see the feeltech have such low distortion on sinewaves. I wouldn't think that about Chinese tech.

[@TonyAlbus]

Thank you, yes Feeltech better then expected..

[@craigwilliams2325]

A link to the 10mhz bandpass filter please.

[@TonyAlbus]

Hello Craig!, item links i mostly put in the description of the video . and i did this time also... here as an extra service for you :) 10 MHz BPF : nl.aliexpress.com/item/32617527968.html Tony

[@LockdownElectronics]

Looks really nice, I will dream of owning one someday! 73 de Bill, G1YQY

[@TonyAlbus]

Thank you Bill !.. yes in my dream too, i need to send it back, but enjoyed the time i had with it...

[@ta1cbo]

Nice video thanks Please check your microphone

[@TonyAlbus]

Thank you!

[@Radioguy00]

Yes unfortunately the quality of the audio is poor which makes it almost impossible to understand

[@TonyAlbus]

you will find my last videos better, i finally found a good microphone..

[@mrbambix]

Very expensive AM radio ;-) No in al honesty a great analyzer for a decent price even allthough i cant afford it.

[@TonyAlbus]

Thank you Leo, Yes for a radio a bit high priced ..LOL .. You get a lot of good stuff in this plasic box :))