Comparative Analysis: Feel Tech FY-6600-60M vs FY-6800 Arbitrary Generators

FY-6600-60M - usually has a weak power supply, but you can replace it with something better
https://www.eevblog.com/forum/testgear/waveform-generaters-fy6600-vs-jds6600/

Page no. 45 specification of FY-6600-60M
http://gotronik.pl/img/FY6600_Series_Users_Manual.pdf
Specification of FY-6800:
http://en.feeltech.net/index.php?case=archive&act=show&aid=61

I only include 60MHz models

The cost of the FY-6600 is PLN 285-290 and the FY-6800 is about PLN 325, are the parameters significantly better?
Is it worth replacing it with a higher model from your experience? Are these features useful?
Do you use the potential of your generators?

Anticipating the questions:
1) I know it's a Chinese generator and the quality of the components is not high
2) I know that it has a power supply that is not of the highest quality and the device itself is high end
3) generators on a well-known auction site are significantly more expensive and appear very rarely - I searched and did not find
4) I could build a generator but I don't want to do it because I need it for another project, the purpose is to use it, not build it

I gave 445 PLN for FY-6800. For my home made needs very ok. Before, I was thinking about a Rigola generator, but I came to the conclusion that if I need something better, I will buy the generator for a month. Unfortunately work, work. So only after September 15th will I be able to play with it more.

In the budget of about PLN 500 it is the only option, when used it is quite rare
there were siglents and rigoles but rather of similar functionality

Will you share your opinion? Are you using an arbitrary generator or just a sine?

On eevblog there is a very large topic about these generators and I strongly advise you not to buy 6600. It has a software error and when buying on Ali ... you do not know what version of the software "you will get". scrap "for 4 hundred pounds. How to buy is only 6800 (although it is not known whether "something" will come out with time).

What is the software bug?

The error is related to ver. 3.0 and 3.1 The generator works great and suddenly the device can work but there are no signals at the output and then it won't start anymore. Someone wrote on eevblog that as part of the repair he received a new front panel from the manufacturer with a control processor, but in general the warranty is lame. The manufacturer absolutely does not care about repairing broken devices! Regarding 6800 so far, there are no comments, though it is clone 6600

Does this only apply to V3.0 and V3.1? Are there other bugs and risks?

Regarding v3.2 no one reported spills. Several owners have reported the problem that the main sysem clock is of terrible quality and after replacing it with a branded oscillator there is a definite improvement in the stability of the generated signals. There is also a very poor power supply for modification or replacement.

Could you give us a source that you know about oscillator problems? How to replace it?

What to replace the power supply? I have a very good 12V 30A, but it's probably a slight exaggeration

Everything I wrote about before, I know from the topic on EEVblog. There is a very large topic about this generator (there is absolutely nothing on the Polish net) with advice, photos and various "patents" that people do with them or are constantly trying to fix "dead" arts. Many owners replace the poor impulse power supply with a linear equivalent (there is a lot of space) and one user wrote about the oscillator that it swims a lot and others agreed that it would be good to replace it. He showed pictures of his copy and it follows that a simple replacement is enough, he also gave the symbol he used.

If mine will have the appropriate software version, I will also replace the power supply and oscillator

Thorgus: Did you buy?

Yes, but it has a damaged USB connector:?

soft ver. 3.3

Thorgus: So you bought the FY-6600. Where did you buy and why did you choose the FY-6600. How can you be sure that the beaten USB? I don't know about the FY-6600 but my 6800 works averagely with the Signal PC Software DDS.

Why - the cheapest arbitrary generator on the market
How can I be sure - I will examine the D + and D- pins from the USB with the oscilloscope and I will be sure what is going on

I will let you know when I can exchange something