We have used scopes on ham radio rigs for a while now on the higher priced gear. Very handy for accessing noises and there sources. Interesting to see how much more of a foot print the 72 mhz transmitter produces over the 2.4 ghz gear. Very informative presentation as always....nice to see a subject broken down and made easy for all to appreciate.
Barry, it's really great to see you making more videos like this! I'm sure there are many people, like me, who don't watch much television and use UA-cam as a more specific viewing experience? I for one look forward to getting home from work and watching educational material, such as yours, to broaden my horizons! Thanks for all your hard work and rest assured that it is very much appreciated! All the best from sunny Normandy, Rich.
Wow great explanation of frequency spectrum in the beginging. I already had a grasp of it but I'll redirect newer persons to this video for a proper explanation!
What a terrific bit of kit, I now have to have one so I too can measure frequencies. And keep a watch on all extra high power UHF RC TX out there. Not to mention those who are transmitting on 1110 bicycles per second in the gas metre band!
If you have a immersion rc UHF receiver you can use it as a spectrum analyser for the 433 band. The gopro does give off some noise in this band which you can measure.
Was interesting that the 72MHz gear output some noise in the high 80's as well... Great to know what the gear we use emits, would be interesting to see what comes out of a few ESCs and switching BECs. My guess is much lower frequencies, but curious anyway.
Thanks for the thoughtful review. In yesteryear I used HP spectrum analyzers working in microwave communications at a satellite earth station and now I'm pondering purchase of one myself for copter RF transmission and antenna tweaking. I do have a lower frequency (UHF) portable handheld analyzer from RF Explorer and am looking forward to purchasing their extended range (to 5.8Ghz) unit when it ships. Otherwise, the SPECTRAN HF-6060 V4 10Mhz - 6Ghz model looks nice despite costing 1,000 Euros. On up from there a used HP analyzer seems to be running $2,000 on up.
Very nice bit of kit Bruce. Are you building and anechoic chamber too? They were supposed to have that noise solved with the new horizon HD. Have you seen or heard of the RF Explorer?. Not as wide band, but cheaper and more compact.
Great videos Bruce! I'm getting smarter every day! But make sure you use the proper uppercase M's and G's for Mega and Giga, or else they are milli and some other stuff. :)
Good work Bruce, I would be really interested if you could test to see what difference low pass filters actually make on cheap video transmitters from China. Every time I tried to use my 1.3ghz vtx it caused problems with my DJI GPS receiver and my 2.4ghz receiver. Once I added the 1.3ghz low pass filter it seemed to resolve the issues.
Very good explanation. Have you heard anything from HK about them sending you a new 9XR TX for testing and review? Some number of us have asked them to do it. Let us know if you get any word, or by chance one just shows up. Cheers.
Thanks. :-) I'm aware of that, as indeed the snow on an old analogue TV will in part be from that radiation. Jupiter emits a much stronger radio signal that is easy to pick up too, for example. I was just curious if there was a particular frequency that the CMBR emits at now that could be zeroed in on with a frequency analyser and a suitable antenna.
Hi, great videos. Could you someday also explain about what materials or objects near receiver can have bad effect on signal reception (like metal push rods, screws, electric wires...). And please measure noise of 808 keychain camera. Once i crashed my plane with onboard camera and now i dont know what to blame (keychain or metal push rod near antenna). Thank you.
Great! Do you think there is a possibility to build a cheap "noise" detector for home use? So we would find the source which influences GPS 1.2Ghz or RX 2.4Ghz.
Nice. My only objection is that the received signal need not necessarily be a radio signal, it could be perfectly anything at all that is converted into an electric signal, such as AC, digital communication, sound, whatever.
hi, do we need to hook spectrum analyser to the input to measure the noise, or it scan all the frequency in the air.. sorry I am new bie.. know how to use scope, but this is the first time seeing..
One small point, when I was teaching test equipment I would describe the display as frequency over power rather than frequency over aptitude. Reason for that was to avoid confusion when comparing an AM signal to an FM signal on a common carrier such as the old analog composite video was avoided.
See if you can find a Fluke 345. It's an all in one multimeter, o-scope and inductive amp probe. Logic analyzes are beasts of their own as you need 32 or more likely 64 channels to view parallel logic. Series logic is more difficult to view unless you can sync the scope off the clock there isn't anything to sync the scope off of.
The problem is in the signals that share the same frequency. Copter is 2.4 GHz and AV Transmitter is 2.4GHz also. Since both antennas are close together the copter looses power for instants and so I cannot stand watching such flying behavior, it is scary! I am not able to find a way to change copter frequency (would be nice!).
I assembled a "poor man FPV", all for less than a hundred dollars, using: Micro Camera with LED Lamp 420TVL 2.4Ghz 4 Channel AV Transmitter 200mW 2.4Ghz AV FPV Receiver (Arduino Compatible) WLtoys V949 Beetle RC Quadcopter Mini UFO 3.5 inch TFT LCD Car Rear View Monitor But alas, the copter looses power all of a suden for fractions of a second. I imagine your spectrum analyser wil show an overlapping signal of both transmitters. Is there a way I can modify one of them?
I want to use epoxy pigmented with aluminum powder to paint a balsa model. tested a dried sample with a volt meter and got infinate resistance, same result with dry aluminum powder. I put a spectrum reciever in an aluminum can and range tested it to about 300 feet and it worked fine, couldn't see any farther. my questions are, how the hell does it work in a can and do you know of any problems from aluminum paint or carbon fiber?
Yeah Bruce, put a tinfoil hate over the antenna and see if it works. Also, while you are at it, can you pick up the cosmic microwave background radiation left over from the Big bang?
SARK-110 Antenna Analyzer -- $360 seeedstudio(dot)com/depot/preorder-sark110-antenna-analyzer-p-1270(dot)html?cPath=174 The SARK-110 Antenna Analyser is a pocket size instrument providing fast and accurate measurement of the vector impedance, VSWR, vector reflection coefficient, return loss, and R-L-C (as series or parallel equivalent circuits).
We have used scopes on ham radio rigs for a while now on the higher priced gear. Very handy for accessing noises and there sources. Interesting to see how much more of a foot print the 72 mhz transmitter produces over the 2.4 ghz gear. Very informative presentation as always....nice to see a subject broken down and made easy for all to appreciate.
Barry, it's really great to see you making more videos like this! I'm sure there are many people, like me, who don't watch much television and use UA-cam as a more specific viewing experience? I for one look forward to getting home from work and watching educational material, such as yours, to broaden my horizons!
Thanks for all your hard work and rest assured that it is very much appreciated!
All the best from sunny Normandy,
Rich.
I am learning all the time in this hobby thanks for the easy to understand explanation
Wow great explanation of frequency spectrum in the beginging. I already had a grasp of it but I'll redirect newer persons to this video for a proper explanation!
I was always curious how those things worked. Thanks Bruce.
thanks for taking time and creating this very simple to understand tech video
Awesome tutorial! What a great way to explain a spectrum analyzer and what it does...
What a great toy!
Please, we want the spectrum analyzer in all electrical device's review!
Informative and clean, don't see why you thought you did a bad job.
Very good news Bruce. Thanks. Can't wait for your review.
What a terrific bit of kit, I now have to have one so I too can measure frequencies. And keep a watch on all extra high power UHF RC TX out there. Not to mention those who are transmitting on 1110 bicycles per second in the gas metre band!
You have a superb sense of humor.
Great video Bruce! I always wondered what those things actually did and how they were used. Thanks.
thanks for continuing to teach thru your channels.
Very nice explanation and demo! Thanks for the video.
If you have a immersion rc UHF receiver you can use it as a spectrum analyser for the 433 band. The gopro does give off some noise in this band which you can measure.
Was interesting that the 72MHz gear output some noise in the high 80's as well... Great to know what the gear we use emits, would be interesting to see what comes out of a few ESCs and switching BECs. My guess is much lower frequencies, but curious anyway.
Thanks for the thoughtful review. In yesteryear I used HP spectrum analyzers working in microwave communications at a satellite earth station and now I'm pondering purchase of one myself for copter RF transmission and antenna tweaking. I do have a lower frequency (UHF) portable handheld analyzer from RF Explorer and am looking forward to purchasing their extended range (to 5.8Ghz) unit when it ships. Otherwise, the SPECTRAN HF-6060 V4 10Mhz - 6Ghz model looks nice despite costing 1,000 Euros. On up from there a used HP analyzer seems to be running $2,000 on up.
You did a great job! I had some idea about what it did before the video, but you helped me understand it completely! Thanks. :)
I would love to see a series of videos where you measure the noise of different rc components, esc's, bec's, cameras...
Very nice bit of kit Bruce. Are you building and anechoic chamber too?
They were supposed to have that noise solved with the new horizon HD.
Have you seen or heard of the RF Explorer?. Not as wide band, but cheaper and more compact.
Well done again Bruce....I learned again
It is very useful in finding modulated signals, that two frequencies might combine and make a third one.
Great job on this equipment.
Thanks Bruce I need all tha education I can get. I'm wonder about the combination of transmitter and receiver like FPV different ones ? / ?
Great videos Bruce! I'm getting smarter every day!
But make sure you use the proper uppercase M's and G's for Mega and Giga, or else they are milli and some other stuff. :)
Good work Bruce, I would be really interested if you could test to see what difference low pass filters actually make on cheap video transmitters from China. Every time I tried to use my 1.3ghz vtx it caused problems with my DJI GPS receiver and my 2.4ghz receiver. Once I added the 1.3ghz low pass filter it seemed to resolve the issues.
Bruce - Excellent device - but is there a low cost option/less comprehensive device for those with an occasional SA requirement?
Very nice gadget Bruce. Would it be good for detecting bugs? As in carefully hidden listening devices.
Great stuff Bruce! Any tip on an affordable logic analyzer/scope for an average DIY'er ?
Great information for other hobbies as well, such as Ham Radio...
Bruce you actually made this sound interesting. Thanks
Very good explanation. Have you heard anything from HK about them sending you a new 9XR TX for testing and review? Some number of us have asked them to do it. Let us know if you get any word, or by chance one just shows up.
Cheers.
So fantastic video. How much channels the Turnigy 9x hops? two, three, more?
Thanks again, Always soo cool and informative...
great video Bruce
can't wait to see more
Thanks. :-) I'm aware of that, as indeed the snow on an old analogue TV will in part be from that radiation. Jupiter emits a much stronger radio signal that is easy to pick up too, for example. I was just curious if there was a particular frequency that the CMBR emits at now that could be zeroed in on with a frequency analyser and a suitable antenna.
It would be cool to see just how much RF noise different SBECs make - especially the "Low RF Noise" ones.
Hi, great videos. Could you someday also explain about what materials or objects near receiver can have bad effect on signal reception (like metal push rods, screws, electric wires...). And please measure noise of 808 keychain camera. Once i crashed my plane with onboard camera and now i dont know what to blame (keychain or metal push rod near antenna). Thank you.
Great! Do you think there is a possibility to build a cheap "noise" detector for home use? So we would find the source which influences GPS 1.2Ghz or RX 2.4Ghz.
Fantastic tool! Can't wait to see the horyzon hd v3 review... Quick question, how can it pick up that wide a spectrum with the same antenna?
Thanks Bruce,"teach good you do"!
what exactly is the trig level?? thanks for the video ,..it was so much easier to understand then i thought,
Good Demo of the Spectrum Analyzer, Bruce
When will you review the Dragon Link UHF system ?
That one is great! Nice price and simple. Thanks
Nice. My only objection is that the received signal need not necessarily be a radio signal, it could be perfectly anything at all that is converted into an electric signal, such as AC, digital communication, sound, whatever.
hi, do we need to hook spectrum analyser to the input to measure the noise, or it scan all the frequency in the air.. sorry I am new bie.. know how to use scope, but this is the first time seeing..
One small point, when I was teaching test equipment I would describe the display as frequency over power rather than frequency over aptitude. Reason for that was to avoid confusion when comparing an AM signal to an FM signal on a common carrier such as the old analog composite video was avoided.
Thank you, this is very informative, helped me a lot. Keep going!
Why does a second spike appear on the 72 when its switched on? I mean thre is the big one, and then a new little one? What is that?
Ok, nice tip. Thanks Bruce!
Very nice job, thanks
See if you can find a Fluke 345. It's an all in one multimeter, o-scope and inductive amp probe. Logic analyzes are beasts of their own as you need 32 or more likely 64 channels to view parallel logic. Series logic is more difficult to view unless you can sync the scope off the clock there isn't anything to sync the scope off of.
The problem is in the signals that share the same frequency. Copter is 2.4 GHz and AV Transmitter is 2.4GHz also. Since both antennas are close together the copter looses power for instants and so I cannot stand watching such flying behavior, it is scary! I am not able to find a way to change copter frequency (would be nice!).
I think it would be helpful to see what type of noise a GoPro emits :)
SICK ...
Show that one to Bruce and see if get an answer!
nicely explained
Seems like this would be great at determining the effectiveness of any ad hoc shielding like aluminum foil.
I would love to have one of those.
How is the spektrum dx8? Noise, safe, stabil? Pleace make a rewiev
you make learning fun!
Wrap foil, or Mylar around the TFT and leads OR, put it in a metal box and cut out a hole so you can see it.
thank you very much for yo video. is is possible for Harbor radar to have an effect on wifi....
How would I use the spectrum analyzer to tune an RC reciever?
can you do a video about fpv antennas, with is the best antenna.
Looking on line, they still seems to be $6000-yikes!. Where did you get yours?
Thank you, sir!
But I will do what you suggest anyway, I have some foil in kitchen waiting to transform itself into a "Faraday prét-a-porter" costume for monitor :)
Is the antenna shown @12:00, tuned to ISM band? (2.4ghz)
what is the role of centre frequency while detecting signal in spectrum analyzer???????????
Gyanendra Pandey dude, seriously?
Is this the same as a frequency counter? Does anybody know where to purchase a frequency counter from?
Will it go up to 5.8 ghz?
Is that ~433Mhz peak from UHF TV?
Maybe it's from the analyser itself =O
You should do a video on dB dBm etc...
Thank you Sr!.
FR SKY Review on the Spec please Bruce :)
Brilliant Bruce
ATB Malc
CPTV
DOSE THE SPAN EQUAL TO RBW HOW TO CALCULATE BW FOR FM
by range test I mean with the transmitters range test function.
I assembled a "poor man FPV", all for less than a hundred dollars, using:
Micro Camera with LED Lamp 420TVL
2.4Ghz 4 Channel AV Transmitter 200mW
2.4Ghz AV FPV Receiver (Arduino Compatible)
WLtoys V949 Beetle RC Quadcopter Mini UFO
3.5 inch TFT LCD Car Rear View Monitor
But alas, the copter looses power all of a suden for fractions of a second.
I imagine your spectrum analyser wil show an overlapping signal of both transmitters.
Is there a way I can modify one of them?
I want to use epoxy pigmented with aluminum powder to paint a balsa model. tested a dried sample with a volt meter and got infinate resistance, same result with dry aluminum powder. I put a spectrum reciever in an aluminum can and range tested it to about 300 feet and it worked fine, couldn't see any farther. my questions are, how the hell does it work in a can and do you know of any problems from aluminum paint or carbon fiber?
Yeah Bruce, put a tinfoil hate over the antenna and see if it works. Also, while you are at it, can you pick up the cosmic microwave background radiation left over from the Big bang?
wow, so i guess you can use this for searching for any kinds of bugs, gps 4G or maybe even wired bugs if its sensitive enough
Nice "tutorial" ! thanks !
A fancy radio receiver. Just does much much more hehe...
Nice accent though, from which region you come from sir?
Ahh good point :)
Assy Model Reviews?
Static is just those leftovers... Pretty much...
You can see or listen to it... turn on the TV or radio and disconnect the antenna!
I was wondering about this too. Maybe a fat one? ;-)
Yep, the price is coming down. Saw one advertised for $5999.99. LOL! (Digikey)
It only goes up to 200 mHz :n/
way cool
yes it's infotainment
ah great... now i want one of these :/
I still don't know what it does lol but that's just me.:)
hi guys . I am planning to buy a spectrum analyzer , if anybody can introduce me a company
Check out Rigol, what do you want to use it for?
Probably a sideband.
SARK-110 Antenna Analyzer -- $360
seeedstudio(dot)com/depot/preorder-sark110-antenna-analyzer-p-1270(dot)html?cPath=174
The SARK-110 Antenna Analyser is a pocket size instrument providing fast and accurate measurement of the vector impedance, VSWR, vector reflection coefficient, return loss, and R-L-C (as series or parallel equivalent circuits).