#313

Подписаться 472 тыс.

Просмотров 195 тыс.

50% 1

Spectrum Analyzers are very useful if you work with radios. Unfortunately, they are very expensive. Until recently, when I saw this small device for around 50$. Unbelievable. But is it any good?
In this video, we will:
- See, what such a spectrum analyzer does and how it works
- Have a close look at this cheap device and compare its readings with a more expensive one
- See the difference between spectrum analyzers (SSA3032X), Vector Network analyzers (N1201SA), and SDR radios
I am a proud Patreon of GreatScott!, Electroboom, Electronoobs, EEVblog, and others.
My HAM radio channel: / @hb9bla
Links:
Spectrum Analyzer LTDZ: bit.ly/2SPwXSz or s.click.aliexpress.com/e/_d7O... or amzn.to/2LFBHJu
Much better product (TinySA ultra): s.click.aliexpress.com/e/_DdL...
Software: dl4jal.eu/
SMA Attenuators: s.click.aliexpress.com/e/_d62...
Vector Network Analyzer N1201SA: s.click.aliexpress.com/e/_dYy...
NanoVNA: s.click.aliexpress.com/e/_AevM5f
Different LTDZ sites: www.rudiswiki.de/wiki9/Spectr..., alloza.eu/david/WordPress3/?pa..., www.epanorama.net/blog/2019/0..., vma-satellite.blogspot.com/20...
SSA3032X Teardown: • TSP #104 - Siglent SSA...
VNA video: • #191 Optimizing Antenn...
SDR video: • #286 How does Software...
Transistor Tester video: • #290 How do Transistor...
The links above usually are affiliate links which support the channel (no additional cost for you).
Supporting Material and Blog Page: www.sensorsiot.org
Github: www.github.com/sensorsiot
My Patreon Page: / andreasspiess
My Bitcoin address: 19FSmqbBzb5zsYB1d8Bq4KbxVmezToDNTV
If you want to support the channel, please use the links below to start your shopping. No additional charges for you, but I get a commission (of your purchases the next 24 hours) to buy new stuff for the channel
For Banggood bit.ly/2jAQEf4
For AliExpress: bit.ly/2B0yTLL
For ebay.com: ebay.to/2DuYXBp
profile.php?...
/ spiessa
www.instructables.com/member/...
Please do not try to Email me or invite me on LinkedIn. These communication channels are reserved for my primary job

Наука

Опубликовано:

6 июн 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 548

@L-36 4 года назад

I designed spectrum analyzers for Hewlett Packard as my first job out of collage in 1971. The group I worked in is now called Keysight. They were very expensive but I see you can buy one now for a few hundred dollars and get a spectrum analyzer that works to 22GHz. Wow. I worked on the log amplifier that had a dynamic range of 100dB. Loved this video. I think that this cheap analyzer is mixing the input down to DC but the filter is actually a bandpass with a bandwidth of about 250 KHz and a center frequency of about 200 KHz. Thus when you input a signal you see both the + and - image products of the mixer output spaced 400 KHz apart. The display occupies that plus the bandwidth of the filter so they call it 1 MHz. When the LO is tuned to the frequency of the input signal the output is DC and the filter blocks it so you see what looks like a notch in the output.

@szabonandi 4 года назад

This is when somebody understood the math behind the view... congrat!

@LutzSchafer 4 года назад

Yeah that's very plausible. Thank you! That both side bands are visible seemed obvious. But how is this avoided in the design of professional instrumentation?

@L-36 4 года назад

@@LutzSchafer It gets very complicated as there are way more things to worry about than just the issue with this cheap spectrum analyzer. But for the question asked I will give a short reply. If you want to analyze .1 to 2.5 GHz, mix the input up to 3.6 GHz. Then the LO goes from 3.7 to 6.1GHz and the difference signal is 3.6 and the sum is 3.8 to 8.6 and can easily be filtered out. Then use another mixer to get the signal down to 300 MHz and another to get to 21MHz where I built the Log amp. These frequencies need to be carefully selected so that harmonics of the LO do not put spurious signals in band so they are picked more carefully that what I did in the above example. Hope this helps.

@L-36 4 года назад

By the way, the HP8566 weighed 100 pounds.

@AndreasSpiess 4 года назад

I suggest to watch the Signalpath video. There you see exactly what Allen explains: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Fn7uaEVeOPk.html

@ernstelderenbosch1715 4 года назад

Thank you for yet another very interesting video! The testing, the explanations and the conclusions at the end are all very valuable. Thank you!

@AndreasSpiess 4 года назад

You are welcome!

@philliptoone 4 года назад

Perfect timing. I just ordered two BF-F8HP radios last week and started studying for my technician license. This week I learned about antennas, SWR meters, and the NanoVNA. So much new information introduced to me in such a short time I feel like I am in college again. Thanks for making this video to supplement what I am already trying to learn.

@AndreasSpiess 4 года назад

Seems you are on the right track!

@mkatsube 3 года назад

Thank you for wonderful explanation! I got exact image of this spectrum analyzer (LTDZ_35-4400M). I had interest in notch characteristics for CW (Continuous Wave) that 145.55MHz in your video. I checked the circuit diagram and I understood the mechanism of that. Following 2 things are the points of the notch: - The same idea of DCR (Direct Conversion Receiver) - The characteristics of RBW (Resolution Band-Width) filter About the DCR, when we apply the same frequency signal for RF (measurement signal) and LO (Local Oscillator) of the mixer (IAM81008), the mixer output become DC signal. And amplitude of the DC signal depend on the phase difference between RF and LO. However, RBW filter has DC block capacitors, so DC voltage doesn't reach to Logamp (AD8307) input pin. These DC block capacitors are the major reason of the notch characteristics. About the RBW filter, I simulated RBW filter (including DC block capacitors) that using LTspice. It had f0= 200kHz +/- 100kHz of bandpass filter characteristics. When we apply CW to the RF input, Logamp input will appear twin peaks of signal because RBW filter has bandpass characteristics. I think your demonstration of 145.55MHz CW agree to my estimation. Because I seen the frequency difference between peak to peak is 400kHz (=200kHz*2) in your video. I got additional idea from these consideration. It is TG (Tracking Generator) offset frequency. In DCR idea, if LO and TG sweep with the same frequency, mixer output will be DC voltage. In this spectrum analyzer, we cannot see frequency spectrum because DC block capacitor blocks DC voltage. So in this spectrum analyzer, TG (become RF signal) and LO frequency should have offset value such as 200kHz.

@retrociencia 2 года назад

Amazing explanation! I was trying to figure out what was causing the notch. This design was used to simplify the mixing stage, using just one, in contrast to "conventional", or "real" spectrum analyzers that uses two or more mixing stages, right?

@andychow5509 4 года назад

Thanks! I was looking at such a very device just the other day to analyse my antenna design. It's really cool that you showed another device @9m30s that is probably more what I was looking for. Thank you for your good quality videos.

@AndreasSpiess 4 года назад

You are welcome!

@larrynelson8385 4 года назад

Excellent presentation and explanations Mr. Andreas. Keep sharing your knowledge and we will enhance our world one step at a time!

@AndreasSpiess 4 года назад

Thank you for your nice words!

@sebrura 3 года назад

You are incredibly talenful in teaching and explaining things in a way that makes it easy to understand.

@AndreasSpiess 3 года назад

Thank you!

@winterheng2359 Год назад

I appreciates how you do the comparison in a very in-depth details. I works as a RF engineer and always find myself lacking in many area. This information is very useful to me on how normal practices are done based on different people and their background. Thanks man!

@AndreasSpiess Год назад

Glad it was helpful!

@JAKOB1977 3 года назад

Thx for the walkthru, well done and I love how you link and make due diligence on these products and link to the relevant parts, that a possible owner can benefit from.(golden) many other channels can learn from the "viewer perspective-awareness" you seem to suit your videos with. well done Andreas. +1 Don't have this Spectrum analyzer but were looking into it as an entry tool to just get familiar with this kind of class apparatus. at around 30 bucks delivered for this unit (no shell), alternatives are not hanging on the threes in this sub 100 bucks environment.

@AndreasSpiess 3 года назад

You are right: For sure it is good as an education device. And knowing this technology is important for many projects

@skylabby 4 года назад

Let me say thank you for this video Andreas. I had this same device from banggood sitting on my desk and couldn't get it to work, i will be going back to it now that i have a better understanding of it..thank again.

@AndreasSpiess 4 года назад

I hope it will work for you.

@funtimess2995 3 года назад

Great videos :) Love the artificial hand...lol You have a great sense of humor along with great tech knowledge... Thanks for making it so much fun to watch.

@AndreasSpiess 3 года назад

Thank you for your nice words!

@tonysfun 4 года назад

Very nice video again! You make my day, because I learn several new things and that is a must for me. Thank you Andreas!

@AndreasSpiess 4 года назад

I try to add some value to my test videos. Like that I hope it is easier for the viewer to decide if someting is good or bad for his application.

@GeorgeWMays 4 года назад

Lab cat. Very important. More valuable than the cheapie spectrum analayzer. Thank you for an informative video.

@AndreasSpiess 4 года назад

And also more expensive ;-)

@SkyhawkSteve 4 года назад

and sometimes cats can be used as an ESD generator.... although usually when you weren't planning on it. :-)

@reinholdu9909 4 года назад

Best "organized" Vid in RU-vid! Please never give up your style of "summarization". -seems yet another piece of equipment where I have to know the result before I can measure it... let me check the improvements ;)

@AndreasSpiess 4 года назад

Should improve the dynamic range...

@reinholdu9909 4 года назад

Andreas tnx... btw:YOU (and QO-100 :) are driving me now to finally go for a HAM licence ...keep up the good work "in style" (=your's :)

@MrPerrey 4 года назад

@@AndreasSpiess - Yes, definitely on of the best organized tec chanel's over YT. And there are no wrong miss leading or confusing procedures. It's Swiss prescision content!!!

@k19radio13 Год назад

Awsome work and chanel. Thank you for your dedicated work. For this present moment the great tool is tinySA Ultra.

@Moonbase59 4 года назад

Always looking forward to hearing from you! I’m not into RF much myself (except when having to filter harmonics, hee hee), but your videos are always didactically well prepared so it’s pure joy watching them and there’s always something to learn. And of course I dig cat-lovers, having had my own lab cat for ever so many years. :-) Anyways, thanks for being there, doing all this and even teaching an old fart new tricks from time to time!

@AndreasSpiess 4 года назад

I am an old fart, too. And Dishka, too. So we are already three. She, however, seems not to be too interested in learning new tricks...

@marcos.1767 4 года назад

Wow. I understood how a Spectrum Analyzer is working and what it's for. In some 20 minutes. Thanks!

@AndreasSpiess 4 года назад

You are welcome!

@lohikarhu734 4 года назад

@@AndreasSpiess BTW, Andreas (du ?), is the hat simply part of your personal style, or is it a kind of "Tracht"?

@reinholdu9909 4 года назад

Let's wait for Andreas' answer ... (but) If you go back you'll find re. "🤠" that he is/used to be a steampunk afficionado... (zurich maker faire 2017) 73 de 🚲

@PhG1961 4 года назад

@@lohikarhu734 It's an 'ensemble' together with the 'lederhose'. Very common in alpine countries... ;-)

@lohikarhu734 4 года назад

@@reinholdu9909 Steampunk :-)

@CyclingSteve 4 года назад

My cat is a 1KHz detector, he came running, meowing every time you whistled. :D

@hopje01 4 года назад

Mine too! She doesn’t like this video :)

@thebeststooge 4 года назад

Thank you as my cat whined when he whistled and I did not know why but now do.

@AndreasSpiess 4 года назад

Sorry for that, guys!

@CyclingSteve 4 года назад

@@AndreasSpiess It was kinda funny, he never comes running when I whistle, I must be off tune.

@AndreasSpiess 4 года назад

@Green Steve: My natural authority over small animals? ;-)

@Aemilindore 4 года назад

Thank you so much Andreas!! Lovely video. Thanks for your time.

@meteor8076 4 года назад

yes, he has very cool videos

@AndreasSpiess 4 года назад

You are welcome!

@MILENEO3 4 года назад

I was about to buy one of these 50 dollars spectrum analyzer, but after seeing this video I changed my mine. Thanks Andreas Spiess

@AndreasSpiess 4 года назад

You are welcome!

@mwwhited 3 месяца назад

Thanks for the video. Very helpful… and your lab assistant napping at the end is great.

@AndreasSpiess 2 месяца назад

Glad it was helpful!

@AaronJackson1 4 года назад

This was a great video. You explained everything so well. Thanks!

@AndreasSpiess 4 года назад

You are welcome!

@manuelcornejo7405 3 года назад

Yes, yes Andreas is a good communicator

@TheHellfiremissile 4 года назад

Thanks for the video Andreas. My radio club bought a Rigol Spectrum analyser a few months ago and I wanted something similar for my little work bench and having found this on ebay thought it was a good little project ( I bought the naked board). I've only yesterday finished putting it into a case with N connectors and will be keen to try the new software. Love the cat on keyboard :-) Keep up the vid's, It's good to see a ham doing such a diverse range of topics.

@AndreasSpiess 4 года назад

For HAMs a nanoVNA maybe is a better choice to measure antennas and filters. I hope your SA will do the job.

@springwoodcottage4248 4 года назад

Super interesting & my dog jumped from her bed & started barking at your whistle, so we both got something from your video. Thanks for sharing!

@AndreasSpiess 4 года назад

:-)) You are welcome!

@pulesjet 4 года назад

Before Spectrum Analyzers we had Frequency Selective Voltage meters. Aka the most expensive AM Radio's in the world. Cool Video yet again Sir.

@AndreasSpiess 4 года назад

This was probably many years ago... But they did the job. And many awesome projects were done in this time.

@hernanirodrigues5261 4 года назад

Very good job Andreas, nice presentation and very useful, tanks you...!

@AndreasSpiess 4 года назад

Glad you enjoyed it!

@riesmoos 4 года назад

Good video. I had a look at this cheap device a few weeks back, my mouse cursor hovered over the 'buy now' button. After watching this review i decided NOT to buy it, save up more money for a proper one. This video saved me $55 and disapointement. Thank you Andreas !!

@AndreasSpiess 4 года назад

You are welcome. Decisions like that are the purpose of this video...

@TurkishLoserInc 4 года назад

Thank you again for the high quality video! I was thinking about getting one of these, I'm glad to know exactly what the limitations are.

@AndreasSpiess 4 года назад

You are welcome! This was exactly the reason for that video...

@stevec5000 4 года назад

The limitations are not what you see in the video.

@giololucas 4 года назад

Thank you for quality information. I'm using sdr + white noise Zener + spektrum software to align homemade vhf filters. Regarding my application my setup performs similar to NWT. At the end nothing can replace a good sigilent anritsu Hp spectrum analizer. Thanks again !!!

@AndreasSpiess 4 года назад

The new cheap VNAs are a handy replacement for antenna design in my opinion. And affordable for most.

@souta95 4 года назад

Thanks for the video! I found it really informative. I probably would have wanted one of these had I seen them for sale, but as I mostly would use it to measure harmonics from transceivers they are kinda useless. I think for cheap harmonics measurements an SDR dongle and attenuator is the way to go. I already have a Nano VNA for checking filters and antennas.

@AndreasSpiess 4 года назад

You are right.

@thetastefultoastie6077 4 года назад

5:48 _natural sine wave generator_ 😄

@jankomuzykant1844 4 года назад

1570 Hz (by Android apk) ;o)

@AndreasSpiess 4 года назад

So it was a bit over the 1k signal...

@mrdouble 3 года назад

Freaked my dog out

@mszivatz 3 года назад

Thanks for the great video! After this video I bought this analyzer! I am a developer for electronic devices and I think this device helps me. Lg Szivatz.at from Austria

@AndreasSpiess 3 года назад

Glad you like it!

@AjinkyaMahajan 4 года назад

wonderful explanation on a Spectrum analyzer. Thanks ✨✌😊

@AndreasSpiess 4 года назад

You are welcome!

@ThomasDwyer187 4 года назад

Excellent educational presentation, bromigo!

@AndreasSpiess 4 года назад

Thank you!

@olivierlourme9521 4 года назад

Probably my favorite video among all your great quality tutorials! But what does the VBW indication on your Siglent screen correspond to?

@AndreasSpiess 4 года назад

The explanation is here: www.siglenteu.com/application-note/spectrum-analyzer-basics-bandwidth/

@terence79chan 4 года назад

Thank you for this excellent review! I have a spare Agilent 6ghz directional coupler and plan to get this for a friend who needs to measure SWR for his home-built 3.5ghz 5G-antenna. It lacks speed and resolution as a spectrum analyzer, but I hope it works fine for plotting S11 curve.

@AndreasSpiess 4 года назад

I like the VNA to measure S11. But a SA should also work.

@terence79chan 4 года назад

Thanks a lot Andreas, I will give it a go :)

@MalagasOnFire 4 года назад

Very usefull tutorial about Spectrum Analyzer .. the natural sinewave generator is a must and cat is paying atention even "sleeping".

@AndreasSpiess 4 года назад

Yes, she usually does not sleep. She just "rests"...

@zennsystems9433 Год назад

Excellent explanations. Thank you

@AndreasSpiess Год назад

You are welcome!

@cbc7599 4 года назад

Tnx for nice explenation! Got it: the FIXED Resolution Band Width!

@AndreasSpiess 4 года назад

:-)

@minazulkhan8287 Год назад

I like the way you reply to each comment. Keep going

@AndreasSpiess Год назад

Thank you!

@antondahr6792 7 месяцев назад

Fantastic video! Thank you!

@AndreasSpiess 7 месяцев назад

Glad you liked it!

@marsa74 4 года назад

Excellent video, as usual, thanks very much, Andreas. That German "Tiefpaßfilter" should be at least 24 years old as it is written "Tiefpassfilter" since 1996. Now I know what a spelling reform is good for.

@AndreasSpiess 4 года назад

Interesting. Frequencies still are the same today...

@tusharg21tube 3 года назад

Wonderful video! Useful & neat!

@AndreasSpiess 3 года назад

Thank you!

@peterlaidlaw8655 4 года назад

Thanks for doing this - useful!

@AndreasSpiess 4 года назад

You are welcome!

@bloguetronica 4 года назад

The solution of removing the display and just add an USB control makes instruments cheaper and, more importantly, smaller. I've made several USB instruments under the same principle. Actually, the video caught my attention because of this. Anyway, loved the video and also subscribed. Thanks for sharing!

@AndreasSpiess 4 года назад

Welcome aboard the channel!

@deniscloud2474 4 года назад

YOU ARE AMAZING ! thanks for good content

@AndreasSpiess 4 года назад

You are welcome!

@qzorn4440 Год назад

wow this is so cool. I am starting to check out how to build a SDR radio telescope and one video used a cheap spectrum analyzer test the 21cm astronomy hydrogen line. This is a all new learning curve on making a homemade radio telescope using SDR software. 😎 thanks a lot.

@AndreasSpiess Год назад

Check the newest link in the description before you buy a TinySA. There is a new version available.

@qzorn4440 Год назад

@@AndreasSpiess I checked it out and ordered a: tinySA ULTRA 100k-5.3GHz Hand held tiny Spectrum Analyzer + 4" TFT LCD +Battery. Thank you very much.

@IanWilkinson-SgtWilko 4 года назад

Excellent video as always! Two quick things... The link to the VNA video in the description is pointing to Amazon, not RU-vid. Did you do a video comparing the nanoVNA to the other VNA? I thought you had, but I can't find it.

@AndreasSpiess 4 года назад

I changed the link now. Thanks. And I did not do a comparison of the nanoVNA. There are quite a few videos out already and I still think, the N1201SA is the better deal for ISM band guys. I wait for the successor which will also cover more than 900 MHz with a decent resolution.

@sq2jul 4 года назад

Thank you for another great video. I wish to see more episodes related to RF signals and ham radio. Vy 73!

@AndreasSpiess 4 года назад

This is not ham channel. It focusses on the ISM usage of RF because only a very few of my viewers are HAMs. Maybe I can motivate a few ISM guys go get licensed...

@magnetiseur77 4 года назад

I made a receiver with tracking ADF synth and nextion display some years ago. To have a flat power signal, I had to add an amplifier and a step attenuator (controlled by µC). It has to be calibrated ! Now I have +/- 1dB precision. (compared to my keysight at work)

@AndreasSpiess 4 года назад

Sounds like a nice project! All possible with today's cheap ICs. And a good instrument for calibration ;-)

@DocMicha 4 года назад

Thank you, That was one of my questions I posted some videos ago!

@AndreasSpiess 4 года назад

:-)

@soumitradey8208 4 года назад

Great Sir! I guess it will be a good instrument to design antenna

@AndreasSpiess 4 года назад

As I mentioned. For antenna tuning, a VNA is a much better tool

@epiendless1128 3 года назад

Thanks. Useful pointers here of what to look for in a cheap analyser. As I like to say, I would RTFM, but there was no FM to R.

@AndreasSpiess 3 года назад

Documentation and software is not a strength of Chinese manufacturers, you are right.

@goofypettiger 3 года назад

Great video, dude. Love the cat.

@AndreasSpiess 3 года назад

Glad you enjoyed it

@PhG1961 4 года назад

I defenately liked this one ! Excellent and well described !

@AndreasSpiess 4 года назад

Thank you!

@iwan6841 3 года назад

I love the little 🖐, pointing out things 😂

@AndreasSpiess 3 года назад

:-)

@manuelcornejo7405 3 года назад

Me too. Where did you buy it?

@TwoDogsFighting 4 года назад

I love that tiny helping hand

@AndreasSpiess 4 года назад

:-)

@Turboy65 2 года назад

I used my R&S FSEA20 analyzers almost every day for a seven year period. I got pretty used to these high performance machines that had a noise floor of about -160 dBM at zero span. Made my job easy. These days those analyzers can be had for about 1500 bucks in good working order.

@AndreasSpiess 2 года назад

You are right. I see a lot of people buying these old instruments. They are a very good choice if you have enough space and maybe also some knowledge to use/repair them. For you, as a long-time user, this is a perfect fit and not comparable with such a cheap device...

@LawpickingLocksmith 4 года назад

Awesome, thanks Andreas!

@AndreasSpiess 4 года назад

You are welcome!

@VK3CSJ Год назад

Thanks Andreas a good informative video. I just purchased a unit off AliExpress not the same one you have here but its labled 35-4400MHz with a IN and OUT port and USB port. I hope it will work well for monitoring a wideband Digital DVB-S2/T ATV transmission at 1255 MHz...love your puscat I have a long hair pus too...Cheers Clint - VK3CSJ...

@AndreasSpiess Год назад

Usually these devices are not used as receivers. They are more used to measure emissions... 73 de Andreas, HB9BLA

@umutk5614 4 года назад

Thanks Andreas, I learned at least basics by your nice video. By the way I loved your cat :-D

@AndreasSpiess 4 года назад

Thank you! And I will tell her...

@umutk5614 4 года назад

@@AndreasSpiess Purrfekt 😃

@mbak7801 3 года назад

In my small lab I have an anti static workstation. Earthing, wrist strap points etc. Grounding for me, my equipment and soldering station. The sight of the purring cat is cute. Except all I could think of was "THE STATIC!".

@AndreasSpiess 3 года назад

She is for sure not helpful to prevent static charges, you are right!

@SteveWrightNZ 4 года назад

Thanks Andreas

@AndreasSpiess 4 года назад

You are welcome!

@ovalwingnut 4 года назад

I ❤ the Mini Me FINGER. Just saying. Good show (you can take my word for it) 🇺🇸

@AndreasSpiess 4 года назад

Thank you!

@anthonycardenas9177 2 года назад

Andreas, thank you for your outstanding work! Please, will you PLEASE update your Links at the bottom? Sadly a number of them no longer connect. Thank you again!

@AndreasSpiess 2 года назад

With 400 videos I cannot update all links :-( But I updated the link to the TinySA

@robertsmiczsmiczamplificat593 4 года назад

Very good info..I subscribed and plan to watch more vids. I have added some external filters and a 30db wide band LNA on the input of mine. It has made the spectrum analyzer more useable. It’s still not great, but much better. I also did clean up the Power supply and did the mods going around on the net. I added a variable attenuator on the in and TG out along with the ext Amps. I packed it a nice shielded cabinet its not as good as a real network analyzer, but it is actually useful now. I actually made a selectable multi filter selection for different band widths. The stock internal filtering was pretty bad. I may try to do some more improvements? We will see? Too many pokers in the fire. Great channel. I enjoyed watching.

@AndreasSpiess 4 года назад

Welcome aboard the channel! You invested quite some effort¨. Maybe you document it for others to follow?

@robertsmiczsmiczamplificat593 4 года назад

Andreas Spiess . Thank you sir. I will try to put together all my info on the mods i made. Its pretty much chicken scratch now, but i will try to compile it i to something intelligible. I will be watching and i will let the channel know when i have good information to share. Thank you for the warm welcome.

@robingilham 4 года назад

Very Interesting and useful. I was wondering if it would be possible to use one of these to perform Prequalification EMC / EMI RF tests in a DIY TEK cell. Or perhaps there might be some other way to get an idea before spending $$

@AndreasSpiess 4 года назад

They are not very sensitive. And for sure not precise. If your application can live with that you are good to go.. I doubt it.

@phiber9 4 года назад

Thank you Guy with a swiss accent. I visited Luzerne for 1 day. At night. It was okay. :) I want a spectrum analyzer. I don't have a use for it right off the top of my head but I would find a reason. Not swiss mentality but hey... this is internet.

@AndreasSpiess 4 года назад

I also have bought a few things like that ;-)

@LutzSchafer 4 года назад

Andreas I have done similar experiments with the same Banggood device. What struck me first was that the tracking generator produces more or less a square waveform. Presumably same is true for the LO since it uses the same chip. So the mixing products must contain odd harmonics of the LO. I also observed the dip when trying to display a single carrier tone. You have any idea what it's causing it? It almost looks like as if both side frequencies contribute to whatever is "measured". The symmetry kindof gives it away. BTW I like your cat :)

@AndreasSpiess 4 года назад

Viewer Allen Edwards below gives an explanation for the notch. Concerning square wave: You are right. But because the LO sweeps with the TG it (usually) does not see these harmonics. I mentioned that the Siglent has more filters. This is where some of them are. Its TG creates a sine...

@ddjazz 4 года назад

TLDR It works but you get what you paid for. Thorough video again by Andreas!

@AndreasSpiess 4 года назад

I still think, we get quite a lot for 50 dollars. Those new AD chips really make it easy to build interesting things...

@geirthorud6581 4 года назад

You saved me $50. I might have bought this for fun. Also from the comments I learned that the Germans have abandoned the old version of "ss" which I learned back in the 1970-s. The "sharp s" which it was called here. (Where is it on my keybord?)

@AndreasSpiess 4 года назад

AFAIK it is still on their keaboard. We Swiss never needed it ;-)

@aballos1 4 года назад

Very nice and explorative video. Did you try the snasharp software???

@AndreasSpiess 4 года назад

I did not know it. But now I tried. Unfortunately I also was not successful. I tried to calibrate the SA and then measure the very same configuration. I would have expected to see 0 dBm across the spectrum. Unfortunately II did not see anything like that. :-(

@acestudioscouk-Ace-G0ACE Год назад

Another very useful video thank-you. 2 years on I was hoping perhaps you had covered the Tiny SA spectrum analyser but could not find it on your page. I would be very interested to know how you find it.

@AndreasSpiess Год назад

It seems to be a good device. There are a few very instructional videos on RU-vid. I think they are from the programmer of the firmware.

@acestudioscouk-Ace-G0ACE Год назад

@@AndreasSpiess Thanks for the reply. I have seen some videos. I was interested in how you personally found them. I think they are worth a try at the price.

@AndreasSpiess Год назад

@@acestudioscouk-Ace-G0ACE I have a Siglent Spectrum Analyzer on my desk. So I did not use the tinySSA a lot.

@DarrellBoger 3 года назад

I LOVE the pointer.

@AndreasSpiess 3 года назад

:-)

@Lion_McLionhead 4 года назад

Relearned the term "tracking generator" from school, but these days you might as well get an SDR in that price range.

@AndreasSpiess 4 года назад

As I mentioned, the SDRs are not exactly the same. If you want one with transmit you are in a higher proce range.

@meteor8076 4 года назад

very interesting !

@AndreasSpiess 4 года назад

:-)

@goofypettiger 3 года назад

Hello, very good video. I just got this same device in the mail. I was disappointed to see that when looking at FM broadcast, the 200khz signal is split into two ghost images, with a notch at the center. Is there a way to change the resolution bandwidth?

@AndreasSpiess 3 года назад

I mentioned it in the video: No, you cannot change the RBW without soldering

@bulldogbrower6732 4 года назад

I hope that they continue to improve the device.

@AndreasSpiess 4 года назад

Let's hope...

@richardroy6747 3 года назад

I would like to buy a spectrum analyzer for 2 reasons: 1-to familiarize myself with spectrum analyzers 2- find FM and LTE signals strenght for interference when I install antennas to be able to determine if FM or LTE traps should be used.Could the cheap one do the job?

@stefankellenberger8315 4 года назад

sehr gut erklärt Danke. Welche Frequenz hat den das Schnurren der Katze?

@AndreasSpiess 4 года назад

"Eine beruhigende Frequenz" würde ich sagen...

@ghlscitel6714 4 года назад

Grüezi! I enjoyed the video from beginning to end. I still use my Tektronix 2711 and I will not buy the one from Banggood.

@AndreasSpiess 4 года назад

Probably not a bad decision ;-)

@HappyQuailsLC 4 года назад

I also would have enjoyed seeing the cat's purring on an audio spectrum analyzer's display output!

@AndreasSpiess 4 года назад

Maybe stuff for another video...

@AndreasDelleske 3 года назад

Dear Andreas, thanks (again!) for your videos! Now if I only had to find out radio interferences disturbing (V)DSL lines and modems (I guess up to 10 MHz), what would you suggest? A cheap SDR might be enough, right? What kind of antenna? Bonus would be if I could scan up to 1 GHz to include LoRa and / or up to about 5 GHz to include Wifi - to cover the last two steps would be much more expensive, am I right?

@AndreasSpiess 3 года назад

It depends if your RFI is conducted or not. And SDR is usually good. But the cheap ones not always cover below 10MHz. If it is conducted (via cable) you can use this video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ii2ObHio9BM.html (in German)

@AndreasDelleske 3 года назад

@@AndreasSpiess Ah great information, many thanks! Just for fun I ordered a SDR dongle and will check if I see something similar as the DSL spectrum (I'll not connect directly I have no attenuator). The antenna design really appeals to me :)

@AndreasSpiess 3 года назад

An SDR dongle anyway belongs in all labs ;-)

@meteor8076 4 года назад

Cat found the best spot for a snap :D

@AndreasSpiess 4 года назад

This is why I need three monitors. One is no more usable...

@danimationstips 3 года назад

Thanks Andreas. I'm interested in testing an area to find out what radio frequencies and signal strengths are present. What would be the most cost-effective way to approach this problem?

@AndreasSpiess 3 года назад

A spectrum analyzer is good. Or an SDR radio.

@danimationstips 3 года назад

@@AndreasSpiess How much would you need to spend on either of these technologies in order to get something reliable and useful? Do you have any brands/models to recommend?

@drouais1008 3 года назад

Hello Andrea, all, First, thank you for this demonstration. Just wondering how you would use the cheap spectrum analyzer to measure noise from magnetron @2.999997GHz in a room? I was aiming to use a dipole antenna on the input but shall I need filtering ? which sweep span do you suggest? any other advise? Thank you and wish you the best for 2021.

@AndreasSpiess 3 года назад

I do not know. Never used magnetrons.

@drouais1008 3 года назад

@@AndreasSpiess ;-) microwave oven for instance !

@BorisDessimond 4 года назад

As usual, very useful video, that will once again hit my student's bank account, that will take me hours to play with that took I don't really need 😭 ❤️.

@AndreasSpiess 4 года назад

If you learn something, it is probably worth the money ;-) Mixers and signal generators are also quite cheap. So you have everything for experimentation...

@BorisDessimond 4 года назад

@@AndreasSpiess 100% agree. That's why I have a salary worth of electronics stacked in boxes in the medicine laboratory I'm doing my PhD in. Waiting for Prusa mini to put those fire hazard in more fancy boxes.

@la7yka 3 года назад

Perhaps it is mentioned, but I didn't got it. Can this analyzer work as a tracking generator, e.g. for bode plotting?

@AndreasSpiess 3 года назад

I do not know a lot of bode diagrams. But the device has a built-in tracking generator. Mind the minimal frequency if you would like to use it for audio.

@daslolo 4 года назад

have you ever made a spectrum analyzer for light? I'm looking for something that goes from 200nm to 1500 nm

@AndreasSpiess 4 года назад

I made a video about measuring wavelength of light. ( ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-sttQAL4r4TQ.html )

@kisho2679 4 года назад

which spectrum analyzer is recommended for identifying chemical elements of a material (by optical, by thermal, ...)?

@AndreasSpiess 4 года назад

I have no idea :-(

@neilw2O 3 года назад

At 10:30 where can we download the great schematic? Nice video.

@AndreasSpiess 3 года назад

drive.google.com/file/d/12X21v9ZoJNJKVbQoKhJkGRNgYE5b_PbG/view?usp=sharing

@neilw2O 3 года назад

@@AndreasSpiess Many thanks!!

@fpaolo63 4 года назад

Hi Andreas, some time ago I bought one of this chip device. I compared features wit a R&S in office lab: agree with your conclusion ... About SW, I tried to be in touch with the original designer but ( I can 100% understand why ) I did not receive an answer. Any way, googling and spent some time reading forum, I found Python driver and commands list ... ... but all is sleeping since "The job is not worth it"

@LutzSchafer 4 года назад

I tried to reach the author too with no success. The software could be so much more improved.

@yangYang-df2zy 4 года назад

I like that sweet hand! That helps a lot!!!!!!!!

@AndreasSpiess 4 года назад

:-)

@combin8or 4 года назад

Please do a video on SDRs and clever configurable (elegant design and possibly cheap using HEMTs/GaN) front ends. I was hoping for a bit more of a deep dive into that sort of thing when I was notified of this video.

@AndreasSpiess 4 года назад

For 50$? GaN? Maybe in a few years...

@combin8or 4 года назад

@@AndreasSpiess $50? I'm confused as to the number you came up with as well as the significance-- I just would like to see an exploration of HEMTs before they're commonplace. Also, GaN transistors aren't very expensive now and they are underrepresented in enthusiasts' communities, so I thought you'd have an opportunity to deep dive where no man had before. It's ripe for clever approaches.

@combin8or 4 года назад

@@AndreasSpiess GaN transistors are cheap and extremely capable (maybe you were thinking of SiC?)-- for instance: www.digikey.com/products/en?WT.z_cid=sp_917_buynow&keywords=917-1153-1-ND

@AndreasSpiess 4 года назад

I thought your comment was about a device using this new technology ;-) I am no specialist in this and I also think it would be too special for this channel. Maybe others will cover it.

@MunnaKumar-sc7qo 4 года назад

Can i use this to measure low pass filter response or something like gain measure of opamp. To generate bode plot.can we sweep from 10 hz to 1Mhz. logarithmic sweep function

@AndreasSpiess 4 года назад

I think the tool starts at 35 MHz

@dave_dennis 2 года назад

I recently purchased a miniSA spectrum analyzer. I am Sure you’ve seen it. It is not all that different than the miniVNA. I would love to see you analysis of it and show too it’s usefulness and it’s weaknesses.

@AndreasSpiess 2 года назад

You find a few very good videos on RU-vid. It seems to be much better than the one here...

@mohalothman99 4 года назад

Great channel and great content! But every time I see this hand pointer I feel terrible may it is kind of phobia I don't know what this feeling!

@AndreasSpiess 4 года назад

Maybe you ask your doctor? It is harmless ;-)

@mohalothman99 4 года назад

@@AndreasSpiess may could I ask you to do not use this hand pointer please? Only for next video I will really appreciate it. Thanks 😊

@carlosgarcialalicata Год назад

Can this be used to find out the right capacitor to reduce noise on digital signals? Thanks!

@AndreasSpiess Год назад

In principle: Yes. But usually people use oscilloscopes for such applications.

@cmuller1441 4 года назад

You could say that the Mixer is a Multiplier. If you remember your trigonometry: sin(a)* sin(b) = (cos(a − b) − cos(a + b))/2 This is why the sum and difference of frequencies appear. In practice the Mixer is not perfect and there are nonlinearities that generates also harmonics so you get N*a + M*b (with N and M integers). But the other frequencies and usually much attenuated with a good Mixer.

@cmuller1441 4 года назад

And if you want to know how to multiply signals: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-7nmmb0pqTU0.html

@AndreasSpiess 4 года назад

You are, of course, right. For my videos I usually need more time to "leave things out" than to "put things in"...

@cmuller1441 4 года назад

@@AndreasSpiess I understand that just putting a trigonometry formula in a video can scare people 😆 I'm not a RF guy at all but I find that part of electronics quite stimulating. I just wanted to add some extra for the curious ones that asked themselves "how does a mixer work?"...

@AndreasSpiess 4 года назад

BTW: Your link points to a very good channel...