Products > Test Equipment
RD JDS6600 25MHz 2-Channel DDS AW Function Signal Generator
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qq354813374:

--- Quote from: technogeeky on July 24, 2017, 05:23:45 am ---
--- Quote from: qq354813374 on July 21, 2017, 08:16:07 am ---
--- Quote from: Kleinstein on July 21, 2017, 07:47:02 am ---Form the picture it looks like the DAC is not a pure R2R chain, but more like using thermometer style for the upper bits. So maybe someone confuses the 14 I/O pins used for control with a 14 bit resolution. At least the DAC seems to work reasonably well as 11 Bit this way.

The DAC type does not have direct influence on the noise with small signals. The waveform should be generated at constant amplitude and only the following multiplier and attenuators reduce the amplitude if needed.

--- End quote ---

You can look at the delicate degree of 14bit waveform

--- End quote ---

I'm sorry to be rude, but I am a bit concerned about your posts in this thread. I think you are trying to imply from the context and content of your posts that you are a mere consumer who has tried the Rui-Deng model and a FeelTech model function generator. Your profile says you're from England.

However:

* you list "feeltech" in your profile
* your username is typical of the email addresses offered primarily to Chinese users by Tencent
* a google search for that username reveals other posts in Chinese in various technical forums
* your English, while adequate, leads me to believe you speak English as a second language
* FeelTech is headquartered in China, and I'm not able to find any offices in the UK
I should note that all of this is just from information you offered (your username, listing feeltech in your profile) or otherwise publicly available information. And I don't know of any reason or rule that one's profile must be correct on this forum, so I doubt you've done anything wrong. I suppose I could believe that you are an Chinese expat living in the UK.

In any case, if you do work for Feeltech (and perhaps if you designed the product you are discussing) I  think you should be up front and honest about that fact. After all, who else would be better qualified to analyze the properties of a modern cheap function generator than a person who just designed a modern cheap function generator?

Thanks.

--- End quote ---

First of all, I am a Chinese, I did not deliberately hide my nationality, I and everyone like FeelTech users, which is me in the "forum" learning reasons, because here you can get more technical articles, out of By chance, I saw RD Tech in the forum to promote FeelTech product designers are their students, so I will call to FeelTecH confirmation. Got FeelTecH designer Sun Yi Jie negative answer. At the request of Sun Yi Jie, I made a comparison of the FY6600 and JDSS6600, responded to the "Forum"


RD Tech:
products are being updated. we are working on it. if we sloved alll problem, i will tell you
SaabFAN:
Can these problems be fixed in software and can user update the firmware themselves?

Or is this more a hardware-issue?
How can customers tell the difference between the updated and non-updated devices?
RD Tech:

--- Quote from: SaabFAN on August 02, 2017, 08:44:14 pm ---Can these problems be fixed in software and can user update the firmware themselves?

Or is this more a hardware-issue?
How can customers tell the difference between the updated and non-updated devices?

--- End quote ---
there are two small problem,
1, background noise, it was caused by DC power supply. it is small and it doesn't affect normal using , I can make sure
2, at low frequency for square wave form, when you amplify 1000 times, you will find that there is little no sync. this don't affect normal using .
excep those , otheres are not my problem.
because those are small problem and don't affect normal using , so we gradually update those things. now we have already update 2 problem, if you order now
thank you for your concern
have a nice day
SaabFAN:
Okay, good to know.
But is there a possibility to install new Firmware via USB, or can the Firmware only be updated by programming the microcontroller via the JTAG-Header?

If the latter is the case, I'd suggest that this feature is implemented as soon as possible, as it will add significant value to the instrument. If any problem is discovered that can be corrected with a firmware-update, users can just update to the new firmware instead of buying a new unit or living with that problem. It also allows you to add features later, maybe as paid options, further adding value.
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