Thanks for doing this video. I'll be waiting for the update, as I just purchased that same generator. It will be interesting to see your changes for a PSU. I replaced that same return wire, but mine wasn't as big as yours. I installed a fan from a zener float, the extra caps seemed to help clean the circuit. It was also missing a heatsink. As always, great video! :-)

This comes out just as I ordered the 6800, nice :)

I've been watching various reviews on these cheaper Function Generators and SDG has been very helpful in choosing one for me in 2023. I'm a hobbyist and purchased the East Tester ET3360C 60Mhz unit. It was delivered this morning (10 day delivery) and I have to admit I'm very happy with my purchase. The unit has a very small screen but is easy to read. This particular unit will do modulation for radio tuning but I will mainly be using it to drive TTL clock frequency. There is a drop off I'm aplitude after 30Mhz Sine but that is to be expected. I'm very happy with my East Tester ET3360C.

Hello Steve! This is the best overview of the generator FY6900 on KZfaq. Thanks. You like it from me.

Thanks verry much Steve. I ordered this generator as it's surely good enough for me, beside i was thinking of building one myselve basicly using the same (Cyclone-4 ans ARM controller) solution. Than this one came along... saves me some time.

Thanks Steve!

Seems like good value for money. Certainly it can serve well for an enthusiast or hobbyist, not for industrial use and I don't think it is intended to. I would appreciate a follow up in-depth review.

Thanks for the info,, I remember the mods you did to your old one and I had followed your lead! I would gladly pay 10 to 15 more for a liner power supply although building one is not a problem but still it would be nice if it would come with one from the start. Thanks again!!

Nice video. So have the potentially dangerous floating voltages been fixed? Will I need to put in a linear supply? Is that what you had to do? I have 39 volts rms coming off the BNC grounds and the very arbitrary signal is disturbing looking spikey garbage - and this is with the power off and the unit connected to mains. Would you know if I'm missing something?

I believe standards call for ground wire to be the same gauge or thicker than mains. That way in case of “catastrophic failure” it would be able to carry all of incoming mains current to the earth and not blow up like the fuse. Here the ribbon cable looks about 22 gauge when mains looks at least twice thicker.

Wait, is that a 10 megahertz XO sitting on the board next to the FPGA? That would make an external reference input mod very tempting.

Thanks for the video. Can this out put modulated waveforms? Thanks

I have been off the air for 35+ years, just started up again and need a few pieces for the bench, not mush reparting anymore, but something to have in case. I was looking at the K moon FY6800 DDS Signal Generator/Counter, For something that may be turned on once a month if that what do you think?

I purchased the FY6600 last year and rebuilt the PSU. It came with a 2 prong power socket which I replaced with a 3 prong. Furthermore the output caps on the PSU were only 16V rated and the rails were measuring 15V. I decided at that point to replace the PSU completely.

Will this unit do audio modulaiton for audio signal testing?

Hi Steve, I couldn't deal with the encoder knob. So I 3D printed a new one. I dl the openscad code from thingiverse and modified the code to what I wanted. It's SO much easier now to adjust the generator. I did print it upside down so the shaft hole was facing up for better results.

Hello. ....Are you able to do a small video on using the sig gen on say receiver front end allignment etc .....not much on youtube about it ...

How about some basic signal quality tests?

Thought: Wouldn't it be better to add a series inductor to the (signal-ground to mains-earth) connection? It would ensure a DC potential between the signal ground and mains earth close to 0V, while letting the EMI suppression safety capacitor carry any high frequency noise

It's a shame they 'have gone for the same crap supply, like you I made a linear P/S for the last model, I will be interested in what you come up with, nice video

Seems like they were taking their design style from Rigol scopes when you look at them side by side. Thanks for your review.

nice review ! if one were to power it via the 5v in on the rear what would be a suitable input current from the PS used ? wondering is a 2.4 a cell phone charger would be acceptable or even what to choose for current from a bench P.S. unit. I'd be using it only for sine wave 20 - 20,000 khz for audio amp testing purposes... at that frequency the square wave may even look proper but all i need is sine really.

Will be looking forward to your next video on this, have just purchased this model and would very much like to make the suggested modifications. Would be nice to do the output of a transformer into buck converter modules but will probably knock up something akin to your FY3224S regulator circuit if that's what you end up doing, at this point i'm just gonna sheeple it and do what you do lol The only thing i'll do different if you go down the regulator route is JLPCB it for a more neater result... I just have a fetish for Red PCB's :-)

On my FY6900 (100MHz version), when I cable one of the signal generator channels over to the integral frequency counter (not shown in this video), it reliably shows the same duty cycle numbers. But when measuring either of the internally generated sine waves, the counter shows a duty cycle if 59.6% or something like that. I have noticed the same thing in some other videos of this model, all of them slower speed versions. I wonder if it is a bug....it does not seem to be due to the sine waves having a DC offset or anything like that........

Can this generator be used as a Dr. Hulda Clark machine will it function the same.

Thanks for the review Steve and it seems not a bad little unit for the price. Still a shame though when test equipment is light with virtually nothing inside. I suppose as long as it works though.. Cheers John

The FY6900 has several models that range from 20MHz to 60MHz. Can the 20MHz version be modified to 30MHz or more? Maybe by reprogramming the Altera Cyclone devise?

How do I open the case of the FY6900 without damaging the plastic.

wonder if they have solved the random bricking of the old 6800. no support means i wont be buying another

Nice video. Does it also show half amplitude when connected to a 50 ohms termination like the previous model?

Does it allow smooth adjustment of amplitude, frequency and so on? Mine appears to disturb the output for a while whenever I do any adjustment to the waveform parameters.

How does compare to other entry level generators?

if using the small screen is a pain then use the software to control it, you can even create your own waveform shapes too.

Does this have decent sweep feature?

Try to not direct BNC cable connect between the FY6900 and a 'scope, say to observe or test the FY6900 wave forms, timing and other features. Ringing will likely occur , occluding and changing wave-forms, etc. Instead, utilize the properly compensated 'scope probe(s), and one will receive and observe a great deal improved wave-forms.

Jak się spisuje topnik RF800 ? :)

Will it work with spooky 2 xm genrator for that info I can pay you.

The 5V+12v,-12v are pretty common voltages, you can easily build a small lnear PSU and fit it in there with LM78xx regs.

As a power electronics enthusiast, that power supply make me sick. Even the 5$ ones at AliExpress are good enough. How much could they be saving with that thing? I bet less than a bloody dolar...

I wish this was available 3 years ago.

Sorry for the stupid question, I am still learning, why the BNC splitter on the oscilloscope and am I mistaken or is it male to 2x female? Thank you very much indeed for the video, I found it very informative, at lease the bits I understood.

Any plans for a more in-depth assessment. It would be nice know if this model can maintain its stated output levels over its frequency range unlike it's predecessor? Karl

Channel 2 just snailed away in the end

Hi. I'm new to this electronics, I have the fy6800 model and when I set the amplitude to say 5volts my scope is actually showing 5.20 volts. what is the reason for this please.

Picked up one of these recently. Was going to build your PSU for it but my FY6900 comes with the v2.1 pcb which only needs a 5v supply.I’m going to try replacing it with a Meanwell 5v SMPS.

Can you name in written that chip at 7:13? Plz

Gee that ribbon soldering was nasty. It seems like just a very minor couple of fixes and it would be a good unit

bought this, and waiting for the update video....

The Roll off is smooth from zero to 60Mhz seen logarithmically, it become noticeable in particular above a couple of Mhz and decreases rapidly towards 60Mhz(-12dB down), good quality signal generators would probably use switchable gain amplifiers or amplifies that can handle higher frequencies. Nice toy!, but its no way a serious bit of test equipment.

Thanks for doing this excellent review. I purchased the same 60MHz unit about 3 months ago and have been reasonably happy with using it to drive a set of synchronized PWM waveforms. One question I have is that you were a little bit cryptic when you spoke of how the power supply was non-ideal because its design wasn't compatible with the need to ground the BNC shields. I think it would be interesting and educational to explore this further if you have time and include high level schematics of the way it's currently being done in this unit, and the better way.

Hi. Thanks for the review. It does not make any sense that the 60 MHz version is rated ONLY to 5 Vpp output. If you see the specs table (at minute 01:30) you will notice that those 5 Vpp are for outputs greater than 20 MHz (take a look at the row immediately above of the one you highlighted in yellow) and the outputs at 24 Vpp are available for frequencies lower than 5 Mhz. It looks to me that this is for all models. I guess those 4 amplitude ranges in the table do not belong to each products model (2nd row), but they do belong to the row with the frequency ranges just above the yellow row. Actually you never adjusted the amplitudes in your video above 5V. Tricky chinese specs table!!!. Thanks.

Hmmm, I'm curious why this blue is line moving away kzfaq.info/get/bejne/fMd-qauCvMWno4U.html Isn't it drive from one frequency source? Or? ... it's strength really.

thanks for the video. for me 5v output is not enough, so I will certainly go for a 30MHz version instead that offers 20V output. also this poer supply seems very crappy. the former 6800 had a better one !

I added rubber feet on the bottom, now it does not slide around so easily.

So beside the lead from the mains which I agree the cable is too tiny, the rest is overkill for a generator that already meets the needs of hobbyists. I'm not sure what you think these units are supposed to have at price point of $100. Realistically you are getting a lot of function for that money compared to the big boys. Frankly I see no issue with its current power supply whatsoever and any variation would be negligible at best. It's not overheating by any means and that's why there isn't a stock fan.

Versions have nothing to do with voltages. Higher frequency ranges limit the max voltage. All FY6900 can do 24Vpp!

lots of issues with this device. Default voltage offsets, distortions when you go above 10V, there are many reported issues

I got a KKMoon branded version of the FY6800 60MHz from Amazon a couple of weeks ago for just £66.49 - absolute bargain. I prefer the FY6800 case to the newer FY6900 - cleaner lines and easier to see markings on the rear panel. It's great value for money considering all it's features and accuracy. Don't forget it's also a frequency meter and counter, and up to 8 units can be sync'ed together. I agree on your comment about the encoder knob. Although it pulls off easily and I can make a bigger one with my 3D printer.

Brasil TKou

You are from poland?

Don't like that power supply at all, shame as the rest of the device is pretty good. I have a FY 3200 S, and the power supply blew up on me big time. (explosive short on the mains rectifier / capacitor area of the board), not happy!!

It helps if I comment and watch the ads

Why do they insist on using those SMPS supplies in a device that shouldn't have noise coming from the supply???!!! Linear or forget it - deal killer from me.

The color of the protection gear is the same as the body color. Also the back panel misses labels and voltage plate. It looks like an unfinished product.

These are good devices, but the power supplies are terrible, which is a shame.

Thanks for the review. I have been looking at this product.They sell four versions of it. Seems to me that the only diffrents beetween the 20Mhz version (cheapest) and the 60 Mhz version (most expensive) is the max output freqency of the sinewave ( 60 Mhz instead of 20 Mhz). All other waveforms have the same top frequency output (except square wave is only 15 Mhz on the cheapest 20M type, but 20 Mhz on the other three more expansive types). What is interesting is that all four version have the same sampling rate of 250 MSa/s. I also do not see any other difference on the spec on the banggood website. As a layman it looks to me that the going over 20 Mhz is of no use with this samling rate. What you are possibly paying for on the more expensive versions ( 30M,50M and 60M) is just unlocking in the firmware, disorted waveforms, that the equipment has no way of displaying correctly. There is only a 14$ price diffrence on the 20M and 60M version. But what are you getting for that money ? Maybe I am missing something on the spec. Please comment if you think I am wrong on this It would also have been nice to see what the waveforms look on the max frequency.

Идеята на това захранване е че хвърля хармоници вероятно до Бога...

Колко щяха да оскъпят изделието ако бяха сложили трансформаторно захранване? Сигурно милярди.

Захранването не е екранирано,спестили филтри,въобще гадна работа...

It is in The name, hrc fuse. But you cant have it all