Vložit
- čas přidán 1. 01. 2021
- MAX2870 LCD Signal Generator vs ADF4351 LCD Review Teardown
ADF4351 go.tonyalbus.com/ADF4351_Ali
ADF4351 go.tonyalbus.com/ADF4351_BG
ADF4351 go.tonyalbus.com/ADF4351_amz
MAX2870 go.tonyalbus.com/MAX2870_Ali
MAX2870 go.tonyalbus.com/MAX2870_BG
MAX2870 go.tonyalbus.com/MAX2870_amz
LTDZ 35-4400 go.tonyalbus.com/LTDZ3544_Ali
LTDZ 35-4400 go.tonyalbus.com/LTDZ3544_BG
Microscope DM9 go.tonyalbus.com/DM9_A
Microscope DM9 go.tonyalbus.com/DM9_B
Microscope DM9 go.tonyalbus.com/DM9_amz
MicroScope WiFi go.tonyalbus.com/MSWfi_A
MicroScope WiFi go.tonyalbus.com/MSwifi_amz
Siglent SDS1202X-E : www.eleshop.nl/siglent-sds120...
PLZ-PLL-435x: www.tonyplaza.nl/download/YT0...
PLZ-PLL-MAX: www.tonyplaza.nl/download/YT1...
Harmonics: www.tonyplaza.nl/download/YT1...
#MAX2870 #ADF4351 - Věda a technologie
Back so soon! :) Another excellent video. I'm thinking of getting myself one of those from your previous video, but having seen this, i think i'll go for the MAX one as it'll suit my needs better. The USB spectrum analyser is also a good piece of kit, as you reviewed it previously and could do with one now and then, so may treat myself to one of those too :) I may even put the signal generator in a box and put the analyser inside that too and have them as a rack unit, as im not too keen on PCB kit, so it will sit on top of another piece of test equipment. Happy 2021!
Thank you Stephen!, yes the USB-SA seems to be very usefull some times. Yes very nice in a rack, good idea!.
Hello Tony one curiosity if take off the power the last memorized freguncy stay on place? or reset automaticaly? I apreciate one comment abaut this board.Regards.
Hello frank, i have had this question many times, it does remember all the setting, only the output goes the the OFF position.after switching on, you net to switch the output ON by selecting point or sweep.
Hello back after this nice video 2 years ago ! I noticed there is a new version of this 2870 signal generator with a modified menu. In the description on aliexpress, the field for entering the reference frequency seems to be missing. There is a new button labeled "gear" that i don't know what it is for. Does anybody here have information? It might also be possible to change the reference frequency by the software, but i wonder if this is maintained after power cycling.
Thanks for pointing out there is a newer model! i only still have the older one.
Tony have you played with the 6GHz version of this? I have some amazon vouchers to use and thinking of getting one.
Hello Andrew, i dont understand the question, i have both versions here in this video 4,4 GHz and the 6GHz
@@TonyAlbus No my bad I was looking at your video and someone else’s and got mixed up 😁
I just got the MAX2870. Not sure I understand the whole "waveform" setting. It never lets me change it. When I first got it, it says "Sine/Square". After using it a bit, it now says "Square" and is permanently stuck there. Changing frequency or power cycling doesn't do anything. Either way, I think it's just driving fast edges, so everything looks square until you approach the bandwidth of your equipment/interconnects. Wondering if I can have more control talking to it over USB. Is it a simple serial connection?
Yes you are correct, it is a square and it just looked sine when the scope reached its limit. i think i connected it to to the PC in the video it was simple, even have the software in the links.
@@TonyAlbus Thanks. The software in your link has some instructions/spec in Chinese. Seems like the waveform is "automatic" but that's not really working well at all. With the PC software, it sometimes does change with frequency, and it sometimes does write it to the device's LCD. Now it seems to be stuck in "Sine/Square" again. Haha. I'll just ignore this. But I wish this was a true sine wave generator.
Hello Tony, to your experience, which one was generally more accurate in timing (Fq counts)? MAX2870, ADF4350 or 4351?
Hi Andy, both 4351 and 2870 were the same in accuracy only the MAX goes upto 6Ghz if i remember correct, i do have more videos about it, also how to make external references to gpsdo so it is spot on.
Its possible to change the ADF chip with the maxim IC without change the firmware ,i think the maxim have other commands, you have a link for flash the maxim firmware in to the mcu for use with touchscreen thx
Hello GR, thank you for your comment, i do not have the firmware, personaly i would not even try that, if it fails you risk $35,- to save $10 for the cheaper ADF ..i would just buy the MAX then if that is what you want.
Hi, in this device ADF4351 is the possibility to update the firmware ?? THANKS FOR THE REPLY
Hi Antonio, i have not found out how or if even the firmware is even available..
@Tony Albus Hello. From this video a saw that board generate square signal . Could you switch signal to sine on board and generate sine on 30, 50 or 100 MHz ?
Hi, its only Square, in that time, i did not know my scope needed to be 3 to 5 time the bandwith of the frequency of the square to see a proper square. than the scope starts to cut 'corners' and shows sine.
@@TonyAlbus Hi, as i have understand, on 17:05 icon Rectangular does not switch to sine ? I saw the same boards and on icon is SINE / Square , but don't know could the, generate SINE. Few days ago i had gotten board fron aliexpres, and it don't geterate sine, but howevere the text was output signal SINE, but it is lie and i have only rectangular and no PC comunication. I started to think, that my board is copy, not original, and your is original
@@_WADSON_ Hi, i checked again on my board as it is an older video and i did not remember. My menu says Square/Sine... but both only do square.
@@TonyAlbus Fake like a my czcams.com/video/fKavvZ0TFuU/video.html (((
Hello, I'm misael from the Sumatran Institute of Technology doing my final project on the gsm signal jammer and I have a problem with how to connect the RF signal generator MAX2870 to ESP32? can you help me?
Hi, seems like a nice project. first that comes to mind here is: maybe you need TTL2serial somewere in between? i am not sure how you are conneting it. i am also not very into those type of projects, but made that mistake once.
Would be good if you can set your spectrum analyzer span to 1mhz and compare the two units for phase noise
Need to read about phase noise.. i hear more people about it.. not sure myself..
Hello，I am a Student .Can this MAX2870 frequency step reach 1KHz? How to determine the values of the resistors and capacitors of the loop filter above.
Hi, do you mean if it can do small steps for fixed setting, or small steps during sweep? the second question about the RC i do not understand what you are reffering to
@@TonyAlbus Thanks for your reply.I have solved my problem in development.
Hi
I need to generate a sweep signal from 50 to 70MHz. But i want to achieve this sweep in 10u sec. Is it possible?
Hi, i don't think so.
@@TonyAlbus thanks.
Is the second port a reference frequency in? Does it accept 10M?
Guess you are looking for this :) czcams.com/video/SNuPzkJFMwY/video.html
Hi Tony, any chance you could do a video on creating a Two Tone SSB test (27mhz SSB CB radio) with either one of these units to feed into a radios microphone??
Aparently you have to make a little summing circuit to mix the 2 channels..
I think a lot of people would lile to see this.
Thanks in advance.
Two tears ago, when i made this video, i have been looking for others making AM or FM modulation modifications. i did not find, after that i have not been looking anymore.
if AM is not made, SSB is also not.
@Tony Albus Alan did one but he didn't go into any detail regarding the BNC SUMMING circuit for the 2 sig gen channels.cheers
czcams.com/video/3DxBg6h4Fc8/video.html
@@andrewverran3498 Thats cool, thanks for the video.
Hi Tony. I got one of these boards with the small olead display and goes 23mhz to 6ghz. Its the Max 2870 version. Its got a 100mhz oscillator on the board and no external reference input. I'm wondering if using the software can I change that to 10mhz ? and will it stay at 10mhz after that? I would like to make it an external 10ghz ref. Also were do you get the software from? At the moment its not very good as its 25khz of freq at 1 ghz and it drifts around a lot..
Checkout my video about the ADF4351 external ref build... for the MAX it is the same... the software i have in thee links
@@TonyAlbus Hi Tony. I downloaded the software and can connect to the board via usb (open port) when i try to send a frequency (point) I get an error Data failed to send please check device. Mine has the small olead screen not hte large screen like yours
@@microwave-vh2uc Okey... maybe it needs other software.. i only have for this device.
@@TonyAlbus Yes I think so . Will have a look around to see what I can find. Thanks Tony
This is really interesting. I have a different version of the ADF4351 that has an adjustable sweep speed as well as step, in uS increments for the step. Now I have to add the MAX generator to my wish list, to get up to 6GHz. As far as the noise goes, with the sweep, I'm wondering if it could be one of two things. First, maybe the processor square clock harmonics are mixing with the generated signal. I say that because I'd expect the processor to have to send a bunch of commands to the generator during a sweep, where it wouldn't on a fixed frequency output. Second, I'm wondering if the sweep could be somehow aliasing with the internal sweep of the spectrum analyzer? I don't know how to check the former easily, unless you were to separate the boards and put a bunch of ferrite on the lines, but for the second, if changing the spectrum analyzer sweep speed changes the noise, it might be some sort of artifact. Either way, very interesting stuff, thank you for posting these.
Hello Tom, funny you say that because, i had indeed some comments about that noise test saying:
A: it is not a realtime SpectrumAnalyzer,
B: the generator and SA are not synced. (like you say alliasing sweeps)
But on my defense both were put to the same (questionable) test :)
Thanks for you comment and for watching.. Tony
On the adf4351 module i want to change with the maxim ic, the hardware is the same, but i must change the firmware for the maxim, or is the firmware only fo the adf ic compiled??🤔
@@grde719 I can't answer your question, but will say that on the screens of the modules I've seen, there's a menu selection to pick ADF or MAX. That leads me to believe they're a little bit different. If for no other reason, you'd have to set different values to get different results. The max datasheet should probably say if they're pin/code compatible.
@@tomsmith3045 i have order the max ic, and i try to change the adf , to see the results, bit i mean i cant change the frequency up to 4.4GHz lets try...😅 I tell you the results
The fact that it is not looking like a square may be the bandwidth of the oscilloscope, not the generator. You need to have a bandwidth at lest five times (or more) greater than your square wave to see it.
Yes you are correct, i did not know that back then.. i think there are more comments about that. i sub. your channel too.. i see you are a TEA brother :)
With regards to the transition between square and sine there is not actually one. It is square throughout the whole range. What you are seeing as a transition from sine to square is just the bandwidth limitation of the oscilloscope which limits the harmonics thus rounding the square wave. Keep in mind that the first significant harmonic is the third, which means that at 150MHz the first frequency component that contributes the squareness is 450MHz which is well beyond the bandwidth of the oscilloscope and will be highly attenuated.
Observing on a 1GHz oscilloscope even at 500 MHz it looks more like a poor square wave than anything resembling a sinewave. At about 650MHz it is something between a square and a sine not really any one of the two, though again this is a limitation of the scope not the output actually becoming a sine. At about 1GHz it is indistinguisahable from a sine to the untrained eye but in FFT I still see the presence of a third harmonic, even if much attenuated.
Keep in mind that below 3000MHz the output is not from the oscillator but from digital frequency dividers which can of course only produce square waves.
This device should not really be considered an RF signal generator and using it as such can lead to unexpected results unless one applies filters to its output to suppress the harmonics. It is more of a digital clock generator.
Thanks Dave, yes this was an older video, then i knew even less then now :) Usualy 3 to 5 times the bandwith you need on a scope. and lower voltages also helps to not get in trouble with the slew rate also.
Thank you for your explaination.
Tony thank you for your review, can you upload the app I bought the same unit, and I can't happen to find the application. If you can upload to google drive. Thank you , from argentina
Hi, greetings to Argentina! The download links are already in the video description. Good luck!
How would one use one of these transmitters for there own project? Could you use this with a raspberry pi and how would you?
Hi, this is a squarewave generator, i have not found a way to modulate the signal, so in that sense for me it does not qualify as a transmitter.
@@TonyAlbus ok thanks, I am just trying to learn this... thanks for the feedback
@@mjmares Great! it is a very nice hobby, have fun!
Thanks for sharing this video and the PLZ-PLL-MAX doc and sw. You're a real lifesaver. Seems the MCLK is internal reference clock. Whatever it measures (mine was 26MHz) is what you need to configure the REF Clock for otherwise the output frequency will be wrong.
Thank you, here i use the MCLK connection for external ref.. czcams.com/video/SNuPzkJFMwY/video.html
Hey Tony, can use one of them for wireless data transmission. It is kind of urgent.
Okey then i keep it short, NO
Thank you for comparing these two devices - great video. Could I have a link to the software plz?
Thank you, in the description you should find links to the software, if not, then the links are in my other videos about these two products. i think its 3 more videos, you will find it.
I'm currently working on programming a ADF6106 that can also get up to 6Ghz.
Hello Dave, thanks for sharing that and interesting... i did a very quick search but i did not find the ADF6106 .. you have a link? you got me interested....Tony
@@TonyAlbus Sorry about that Tony, I typoed the name. I meant adf4106. here is the link www.analog.com/en/products/adf4106.html#
Yes that one i can find also on Ali, but not pre build, so you start almost from scratch.. cool! have fun!.
Hi Tony. The legend has it frequency 150MHz is exeptionally good for human health. How to beam this frequency (to benefit)? Does it take a special antenna?
Hi, i have not heared from such thing, i can not advice.
@@TonyAlbus Thank you.
Thank you for your work. It was very intresting video.
Thank you sir!, you are welcome
The Sine / Square section just tests your 'scope, not the signal generator. You need at least a 500MHz 'scope to properly show a 100MHz squarewave.
Thanks Robert
The increased noise and spikes is just because it is sweeping faster. If you set it to sweep the same slow speed as the other it will look about the same.
The 'noise' is because neither of them does a real frequency sweep but increases the frequency in steps, which in itself creates all sorts of sidebands and spuria. On top of that the transition between one frequency step and another is quite chaotic (in both versions) . Apart from the gap between the end of one frequency and the start of the other there's quite a lot of stuff going on, I think it is partly because the PLL goes out of lock and takes some time to lock to the new frequency.
If you are sweeping slowly this chaotic period is only a very small proportion of the time. However as you make the sweep faster and faster the chaotic part remains the same duration while the useful part is getting shorter and shorter, so at the fastest speed almost half the time is spent in the chaotic state between one frequency step and the next.
Thanks for this information! very interesting
Can these generators be used to produce a carriersignal ?
I have not found a way to modulate it, the Feeltech and Uni-T can..
Can I attach an antenna or to RF amplifier and it became RF transmitter?
Yes you could do that, but i think it is a bit useless, having only a carrier , as we found no design to properly modulate the carrier..
Thanks for your reply. My purpose is to test diy antenna (to get the best frequency channel). Without modulation it should be ok right?
@@tk-maker maybe a NanoVNA would do a better job, but yes i think you can.
Hi Tony, could you tell me the supply voltage to Nihon Dempa SC00001 4HMz TCXO please. Best regards Rohitha
Hello Pradeep, i am not familiar with that type, i also did not find on google.
@@TonyAlbus Hi Tony, thank you for the effort, appreciate regards pradeep
what software are you using onm the screen I need this thing to have precision of 1 hz not 10khz
The software is availble in one of the links in the descriptopn of the video
@@TonyAlbus the software that you used the one you gave thanks for because this thing has precision of 1khz I need 1hz
@@Mosheinventions Yes it is 1KHz smallest step, i tried it yesterday
@@TonyAlbus is there a way to make it more precise I so some CZcams guy say he can get it to any precision because of devider
At 19:06 what software is that
A 200 MHz scope cannot display a 200 MHz square wave. We should expect it to begin to look like a sine wave long before 200 MHz and pretty much a perfect sine wave by about maybe 250 MHz. Not saying the generator is still producing a square wave, just saying that you can't know with that scope. Nice scope BTW. I have the 4ch version and love it.
Yes correct, you need 3 to 5 times the BW than the freq you are meseuring
The PLL filter components are different values with this new chip
Thanks!
I did test it and it does indeed do 5.9GHz ( I have industrial oscilloscope but it works best with a microwave amplifier* PLEASE DO NOT try to amplify at home you WILL burn your routers ( wifi ) trust me 20Db 6GHz amp => 24dbm in total( your microwave oven is 20DB wich is quite powerful ( enough to warrent a non ionizing radiation sticker) ( but anything above 3GHz( without ext clock) is sin wave) and Max chips are meant for industrial app vs the adf is easy to knock off
Thanks for your results and warnings... yes be carefull
@@TonyAlbus No problem and awesome video. ( also did find it does indeed have capability of 6GHz and ironically the harmonics are not noticeble with a microwave attenuator)
The RF stuff is interesting
Thanks Mark!
Hi I am new in RF i want to Build band 860 -970MHz can you provide me the code for MAX2870 Board i shall be very thank ful
Hi Zia, The code i don't have. but i have the control software, it is in the video description. it is called PLZ-PLL-MAX
Hi, in this device ADF4351 is the possibility to update the firmware ?? THANKS FOR THE REPLY
i do not know yet.. i dont know if there is even firmware available.
@@TonyAlbus Thank you, to me today, you will tell me if it is a good rf frequency generator, thank you very much antonio iv3fhs
@@ferrobeton Depends on your perpose for you. it is to loud for adjusting receivers and i have not found a way to modulate the signal. but for other tests is seems nice.