FeelTech FY3224S 24MHz 2-Channel DDS AW Function Signal Generator

[SteveLy]

I just ordered one of these bad boys after reading through this thread and seeing that it is not a total POS. It's incredibly cheap for what it is.

@Pete69Walton: if you still haven't found a copy of the software when I get mine I'll upload it to the cloud.

[LogicalDave]

If anyone wants to see how the FY3224S performs at higher frequencies, I've posted a bunch of photos on my blog including a few comparisons with a Rigol DG1022U:
http://www.dalbert.net/?p=322

Amplitude accuracy is good up to 3MHz and then starts to drop off.  An unloaded 24MHz sine wave configured for 1v amplitude measured 210mv p-p.  However, it is still a decent looking an stable sine wave.

Square waves look good at 1MHz and then start to degrade.  Still serviceable at 5MHz, but above that, the edges are lost and jitter becomes excessive.  It's only rated to 6MHz for square waves so that's probably fair.

I also tested the frequency counter function and it was able to count to its rated 100MHz with a +7dBm signal (lower signal levels reduce the frequency...I was only able to reach 47MHz at 0dBm).  With a strong (+13dBm) signal, it was able to accurately count as high as 225MHz!

[jcrubin]

Should I take consideration when connecting the unit to an amplifier input with a 470K input impedance.  The feeltech is 50 OHM.   

[Stupid Beard]

I wanted to experiment with using the FY3200S to characterise a filter, but ran into the same sweep generator issue that jcrubin did. So I started hacking up something in python to generate better sweeps, but that's unfortunately not going to work. When you change the frequency it resets to the start of the phase so it is not possible to get clean transitions between frequencies.

I couldn't find any existing code posted to control the FY3200S so I took my hacky mess and threw it up on github at https://github.com/stupid-beard/pyFY3200S

This was hacked together in a couple of hours at the weekend so it's really, really hacky and more than a little shitty right now. It's enough to control the basics but I didn't bother with implementing sweeps due to the aforementioned issue. I'll flesh it out further and tidy it up a bit at the weekend when I have more time.

[nctnico]

I would like to isolate the circuit that sends the signal for the sweep to reset and make a usable pulse from it for a trigger for my scope.

How about triggering on the width of a pulse? That should make the scope trigger on the start of the sweep.

Edit: I'll clarify... at the start of a sweep (or end) the sine wave is wider/narrower. The width of the sine wave can be set as a trigger condition in most DSOs. This allows to trigger at a certain point in the sweep.

[jcrubin]

Every single output and input is controlled by the processor, as i'm lead to believe.  This tells me that a trigger could be programmed on an output if the firmware were updated to accommodate such a function.
Has anyone attempted yet to read out the firmware code to decipher it?>

[nctnico]

• Set the frequency to 1999.29994 KHz
• Press the blue knob in (changes display from KHz to MHz)
• Power down the unit and wait 15 seconds
• Profit! (Sine wave capability extends to 24 MHz)

Call me dumb & stupid but this trick doesn't work on the one I have here.

[SteveLy]

Call me dumb & stupid but this trick doesn't work on the one I have here.

Which model do you have?

[nctnico]

Call me dumb & stupid but this trick doesn't work on the one I have here.

Which model do you have?

It is the 6MHz model
Sitcker says: FY3200S
Unit says: FY3206S Rev. 2.0

[nctnico]

Still no way to uphack the newer models? I have tried once more but no luck.

[SteveLy]

I have recently bought an FY3224S frequency generator and it arrived without any documentation or software. Although I was able to download the manual from the web I have been unable to find any software. Does anyone have any such software or know where I can get hold of it?

If you still need the software, I've uploaded it to google drive. Get it via this link:
FY3200S Software

[SteveLy]

Well bugger! The disc the unit came with is defective. The English version of the software cannot be read from the disc.

A quick check of the built-in waveforms on a Rigol DS1054E looked fairly pleasing. Basic sine waves are good to 20MHz, and the rest more or less as one would expect with a ~20MHz BW limit. But damn they've screwed me with the software. If anyone would care to upload the 7MB rar or exe file named:

FY3200 PC Contrl Software V1.4Setup

(or any English version of the software) it would be much appreciated.

[fc12]

If anyone would care to upload the 7MB rar or exe file named:
FY3200 PC Contrl Software V1.4Setup

Just got my FY3224 20 minutes ago. I put the CD to the web, your file seems to be here:

<http://shor.ch/software/FY3224S-arb_gen/FY3200S%20User%20Guide/PC%20Software/>

hope this helps, Daniel

[SteveLy]

Awesome! Thanks!!

[LogicalDave]

I took a look at the spectral purity of the FY3224S (how clean a signal it generates) and posted some pictures of the close-in spurs and harmonics to 200MHz on my blog reviewing it.  The pics are near the end  so you'll have to scroll down a bit.  The blog review is here: http://www.dalbert.net/?p=322

[JohnPen]

How does one get the s/w to work with Win 10??  PL2303 etc does not communicate.

[jackenhack]

I took a look at the spectral purity of the FY3224S (how clean a signal it generates) and posted some pictures of the close-in spurs and harmonics to 200MHz on my blog reviewing it.  The pics are near the end  so you'll have to scroll down a bit.  The blog review is here: http://www.dalbert.net/?p=322

Cool! It would be interesting to have a look inside, especially the output opamps etc.
What was the dB scale on the harmonics pictures?

[Stupid Beard]

How does one get the s/w to work with Win 10??  PL2303 etc does not communicate.

If you can't get it working, the USB to serial thing is a separate board and can be easily swapped with any alternative you may have laying around. Not an ideal solution, but might help.

[quantalume]

I took a look at the spectral purity of the FY3224S (how clean a signal it generates) and posted some pictures of the close-in spurs and harmonics to 200MHz on my blog reviewing it.  The pics are near the end  so you'll have to scroll down a bit.  The blog review is here: http://www.dalbert.net/?p=322

Thanks for this! I'll be very interested to see what conclusions you come to regarding whether or not performance can be improved by modifying the output device and/or filter.  The rotary encoder could use an upgrade too.

[Feuerbard]

i received 12 mhz version from taobao  - 24mhz trick doesn't work too (Ver2.0 on start display)

[Orion12]

I think it's funny that you mention that it will only do 6MHz beyond a sine wave...that's better than the Siglent except on the square which is 10MHz, and it isn't the best looking square at that!  6MHz for an arbitrary waveform is actually very good.  I can't see how the Siglent has much better specs at all really.       

Risetime?

The Siglent SDG 1025 specs I found on the Net list . . .
25MHz; 2 channels; 125MSa/s; wave length: 16Kpts

Here's some of the FeelTech FY3224S Specs from the Ebay Listing . . .
?Built-in arbitrary waveform with 250 MSa/s sampling rate.
?4 downloadable 2048 dots arbitrary waveform memories
?With 12 bit wide waveform generator
?Each function can be adjusted by host computer.
?Preinstalled 14 common waveforms.
?High frequency accuracy: magnitude 10?6
?High resolution: Full range frequency resolution can be 10 mHz.
?Both main and subsidiary wave duty cycle are adjustable separately (0.1%~99.9%?.
?All range continuously adjustable, digital directly setting.
Model
FY3224S
Sine wave frequency range
0Hz~24 MHz
Square wave frequency range
0Hz~6MHz
Triangle wave frequency range
0Hz~6MHz
Arbitrary wave frequency wave
0Hz~6MHz

I pulled the Trigger on this FY3224S DDS AW Function Signal Generator & also a Rigol DS1054Z Scope . . .
Should have the FY3224S within 10-Days & the Rigol Scope by this Wednesday . . .

It's been Years since my Trusty Old TekTronic RM43 35Mhz Tube Scope / 19" Rack Mount has been seen & My old HealthKit 1-100K Sine / Square Wave generator disappeared in an ancient move . . .

Will be kind-of-fun to get a more "Modern" test development electronics bench setup going . . .

This is My 1st Post Here . . . Cheers from Orion12

[Orion12]

I took a look at the spectral purity of the FY3224S (how clean a signal it generates) and posted some pictures of the close-in spurs and harmonics to 200MHz on my blog reviewing it.  The pics are near the end  so you'll have to scroll down a bit.  The blog review is here: http://www.dalbert.net/?p=322

Nice FY3224S Review & Photo Examples Dave . . .
Seeing your review & digging around a bit was all I needed to Pull the Trigger @ $79.55 with Free Shipping . . . I don't believe I'll loose sleep over my missing HealthKit .1-100K Sine / Square Generator ( Which did Serve Me Well for Many Years & was a Fun Build ) . . .

Also Finally Pulled the Trigger for a Rigol DS1054Z from TechEdu.com for $379.05 with Free Shipping . . . If I remember correctly my old TekTronic RM43 / 35Mhz Tube 19" Rack Mount Scope cost about the same USED from United Surplus of Seattle in 1976 . . . Sorting Out the "Best" Deal in Scopes was a Really Tuff task in this Very Competitive Marketplace . . . The relatively easy hack to 100Mhz with 4-Channels continued to best the competition in the end . . . I would have liked getting into a 2M/Sample/Sec scope & Or Faster than 30K / WaveFrame updates but just couldn't find this ANYWHERE Close to $600 with 4-Channels . . . ( Maybe I missed something )

btw . . . How's the USB Connected Software Work with the FY3224S ?

Thanks Again for Your Data Intensive Review . . . Cheers from Orion12

[quantalume]

i received 12 mhz version from taobao  - 24mhz trick doesn't work too (Ver2.0 on start display)

I have version 1.2, and it worked there. They must have made a firmware change somewhere along the way.

[LogicalDave]

I took a look at the spectral purity of the FY3224S (how clean a signal it generates) and posted some pictures of the close-in spurs and harmonics to 200MHz on my blog reviewing it.  The pics are near the end  so you'll have to scroll down a bit.  The blog review is here: http://www.dalbert.net/?p=322

Cool! It would be interesting to have a look inside, especially the output opamps etc.
What was the dB scale on the harmonics pictures?

10dB/division

I meant to post some spectral purity/harmonic comparisons with the Rigol DG1022...I'll try to get to that soon.

[jcrubin]

Ive repaired my HP 331A, power supply and tested the functionality of the unit with the waveform generator




The following photos are before any calibration, and just testing the operation and controls of the unit.  Though not calibrated, feel free to provide any thoughts
on the results.....

Coax to unshielded alligator clips, no 600ohm terminating resistor

THD = .21% at 1KHZ 1V



THD = .205% at 5KHZ 1V


THD = .215% at 10KHZ 1V


THD =.315% at 20KHZ 1V


THD =1.2% at 40KHZ 1V


THD =2.2% at 50KHZ 1V using x10K * 5


THD =2.2% at 50KHZ 1V using x1K * 50


THD = 3.6% at 60KHZ