Author Topic: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator  (Read 316409 times)

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Offline DerKammi

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #725 on: February 09, 2018, 09:00:20 am »
Filled the Git with various info on Hardware/Software/Mods and photos.

https://github.com/DerKammi/FY6600-15-30-50-60M

Lot less scrolling in the pages. Please let me know if something is missing if you want it in.

 
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Offline pauluzs

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #726 on: February 09, 2018, 09:50:34 am »
Hi DerKammi,

Couldn't find a overview of the serial commands on the git.
See attached speadsheet
 

Offline DerKammi

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #727 on: February 09, 2018, 10:00:07 am »
Done
 

Offline fremen67

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #728 on: February 09, 2018, 12:02:39 pm »
Hi DerKammi,

Couldn't find a overview of the serial commands on the git.
See attached speadsheet
Hi pauluzs,
Thank you for helping.
The "SPI Register" column in your document should be removed as it suggests  that there is one register associated to each command.
The serial protocol is only handled by the Front Panel CPU and is transparent for the FPGA.

@DerKamni
The full serial protocol description relased by Feeltech could also be added as well to the repository.
I'm a machine! And I can know much more! I can experience so much more. But I'm trapped in this absurd body!
 
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Offline DerKammi

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #729 on: February 09, 2018, 12:21:05 pm »
Added
 
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Offline cybermaus

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #730 on: February 09, 2018, 01:00:41 pm »
Parts identified: I though we had in the mean time discovered the opamp was not a "unknown THS30021" but instead a known type THS3002I
May still be a fake, but at least a known number:

http://pdf1.alldatasheet.com/datasheet-pdf/view/28726/TI/THS3002ID.html

Also note the PCB layout is such they can use either 2 THS3001, or 1 THS3002

Edit: that was in the FeelTech FY3224 thread that I picked that up.
« Last Edit: February 09, 2018, 01:07:24 pm by cybermaus »
 
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Offline DerKammi

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #731 on: February 09, 2018, 01:10:04 pm »
You're right, made a typo in this. Updated the txt file.
 

Offline soundtec

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #732 on: February 09, 2018, 11:41:43 pm »
Hi DerKammi ,
Looks like your Github post comes up top of the list when I search 'FY6600' now  .
With a bit of luck it should draw in a few more people interested in our cause and with it maybe some extra inspiration and technical wizardry too .
 

Offline Candid

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #733 on: February 10, 2018, 12:19:21 am »
But with an external linear 5V psu you can easily omit the known high voltage to earth problem with the JDS6600.
Not sure if that is true. An external switched PSU has the same problem as an internal one. The only thing is you can more easily switch out a cheap one for a better one, but they both will have leakage through the mandatory capacitor.
That is why I wrote an external LINEAR psu. I replaced the external smpsu with a linear one and everything is fine.
 

Offline cybermaus

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #734 on: February 10, 2018, 05:35:57 am »
Ah, sorry yes, I missed the linear part.
 

Offline DerKammi

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #735 on: February 10, 2018, 06:45:29 am »
Hi DerKammi ,
Looks like your Github post comes up top of the list when I search 'FY6600' now  .
With a bit of luck it should draw in a few more people interested in our cause and with it maybe some extra inspiration and technical wizardry too .

So it does, that is quick. Would be great if we could create that momentum.

Despite the small "bugs" the device has it is worth the price to make some killer custom open source firmware.

I only that FPGA could be... ahh well dreams are for the keeping.
 

Offline DerKammi

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #736 on: February 10, 2018, 03:02:42 pm »
Sure. All my "working" notes are in an excel file. The summary sheet is the pdf file I posted some days ago. Maybe not the best format to put on a github... but I suppose for the moment beeing you can post the pdf file as is...
For the code you can post the FPGA Library (FPGA.c) plus a module I used for testing puposes (Tests.c surprisingly  :)) This might help understand the FPGA library which should already be understandable by itself. At least I hope :P
The next module I will post will be the serial protocol which will be less interesting as already documented by Feeltech. Maybe you could also post the original document from Feeltech ...

Can I have the .h files as well? want to have a go with my fresh blue pill boards on Mark his generator this evening.
 

Offline Lanvernazal

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #737 on: February 11, 2018, 04:20:20 am »
I have made and change a linear PSU for my FeelTech FY6600 .
« Last Edit: February 11, 2018, 11:01:55 pm by Lanvernazal »
 
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Offline DerKammi

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #738 on: February 11, 2018, 06:14:13 am »
Well somebody had a busy weekend :)

Nicely done in the limited space.
 
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Offline Ebel0410

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #739 on: February 11, 2018, 09:05:32 am »
I have made and change a linear PSU for my FeelTech FY6600 .

Nice job Lanvernazal, you did it well.
On my side, because I am a lazy man, my choice was to make some mods on the stock one.
Upgrading some capacitors, switching diodes, earthing the FY6600 with an appropriate socket for the mains input.
Et voila !!



 
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Offline DC1MC

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #740 on: February 11, 2018, 09:15:10 am »
For the German residents, a cheap one (no connection with the seller):

Quote
Biete   Meßgeräte
(Anzeigen-Nr.: 514605)    2-Kanal DDS Signalgenerator Feeltech FY6600-60
Ich biete einen unbenutzten Signalgenerator vom Typ FY6600 an. Es handelt sich um die 60MHz-Ausführung. Informationen dazu finden sich reichlich im Internet. Das Gerät wurde nur einmal zum Funktionstest eingeschaltet. Es arbeitet mit der Firmware V3.2. Preis 70 Euro inkl. Versand innerhalb von DL.
 9.2.18 - 11:06 Uhr    Karsten Hansky - DL3HRT
 dl3hrt@aatis.de

 Cheers,
 DC1MC
 

Offline plb

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #741 on: February 11, 2018, 11:21:43 am »
Has anyone who has gone to a linear PSU done any measurements that demonstrate improvements to stability, distortion, jitter, amplitude vs frequency or any other characteristics? I am mulling the possibility but haven't seen enough justification yet. My limit has been grounding the SMPS common to stop it biting.
There is no technical fault too difficult to solve by sufficient application of marketing.
 

Offline DaveR

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #742 on: February 11, 2018, 11:36:42 am »
I'm waiting for a 15v / 9v R-core transformer to be delivered, then I'll be doing mine - more out of curiosity than anything else, as I'm not convinced it will make much difference - then I'll give you my thoughts.  I'll be happy if it reduces the jitter somewhat.

Dave
 

Offline plb

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #743 on: February 11, 2018, 09:21:59 pm »
Thanks Dave, that should be a useful addition to the knowledge bank.
Will you be doing identical before and after tests?
There is no technical fault too difficult to solve by sufficient application of marketing.
 

Offline DC1MC

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #744 on: February 12, 2018, 06:20:31 am »
Has anyone who has gone to a linear PSU done any measurements that demonstrate improvements to stability, distortion, jitter, amplitude vs frequency or any other characteristics? I am mulling the possibility but haven't seen enough justification yet. My limit has been grounding the SMPS common to stop it biting.

Well, aside the mains leakage protection a linear and good stabilized power supply will do jack against jitter (digital issue), frequency stability (oscillator) and amplitude vs frequency.
It will do a lot of good on: distortion factor of high signal levels under load, noise factor and make the amplitude more predictable. I mean if you connect a 1Mohm scope probe, you won't see too much of a difference, if you connect a 50ohm spectrum analyzer input and play a bit with the levels you'll see the difference immediately, also one can connect a scope with a 50 input and put the triangular waveform.

Someone here did the measurement and the output voltage of the power supply swings in between 12 to 17V !! volts, in different load and frequency conditions, this can't be healthy for the analogue block.

 Cheers,
 DC1MC
 

Offline CharlieEcho

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #745 on: February 12, 2018, 01:50:54 pm »
I don't see the firmware specified anywhere when ordering one. Any way to be sure I get the latest 3.2 firmware?

Order the Kuman-branded version on Amazon (ASIN: B074TCVPVG). It's coming directly from them ("kumanshop") and as of mid-January their stock had v3.2. Boot screen identifies it as a FY6600. They're a Prime seller, so if it disappoints just send it back. Probably pricier than eBay though.
« Last Edit: February 12, 2018, 01:53:04 pm by CharlieEcho »
 

Offline TopLoser

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #746 on: February 12, 2018, 07:13:24 pm »
I ordered one from eBay about 10 days ago and it came with 3.2.1 firmware
 

Offline DC1MC

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #747 on: February 12, 2018, 07:15:46 pm »
3.2.1 ?!?!

A new revision ?
 

Offline TopLoser

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #748 on: February 12, 2018, 07:26:55 pm »
Looks like 3.2.1 to me...
 

Offline DC1MC

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Re: FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
« Reply #749 on: February 12, 2018, 07:29:11 pm »
Hmmm, what they did corrected this time, maybe this endless stupid repetitions of all parameters re-programming when you just change one.
 


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