Products > Test Equipment

RD JDS6600 25MHz 2-Channel DDS AW Function Signal Generator

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Mariocar:
Hi. I'd like to know if you were able to solve your issue. I have the same equipment and I'm having the exact same problem. Although the equipment is working perfectly while connected to the PC via the USB entry and using the JDS software, the display still has the same defect. Thank you for the information! Kind regards.

defcronyke:
Hey folks. I bought the "Koolertron Upgraded 60MHz DDS Signal Generator Counter, High Precision Dual-channel Arbitrary Waveform Function Generator Frequency Meter 200MSa/s (60MHz) Model: GH-CJDS66-FU" awhile ago on Amazon, which I'm pretty sure is the 60 MHz version of this same device being discussed, although if it isn't the same one I apologize, and feel free to remove my comment.

Anyway, I wanted to control this device from the command line (on Linux specifically), and after reverse-engineering how to upload user-defined arbitrary waveforms, I emailed Koolertron and received an official English-language spec for the usb-serial communication protocol from Koolertron's customer support, and while I don't think they'll let me share the spec document, they did authorize me to use it to make an unofficial open source program based on the spec. It looks like it's the official English-language version of the same Chinese document someone translated on this thread.

So anyway, I made a cross-platform command line program (tested and working on Linux and Windows, might also work on Mac but untested) which implements nearly the entire spec (minus some small things from the spec which didn't work as advertised or didn't make much sense), and if you're interested in using it, or studying the code to infer the official spec for your own uses (as it was provided to me in the real English-language document), you can find the project here, I just released the first version this evening: https://gitlab.com/defcronyke/signal-gen-cjds66

I don't claim that it's perfect or anything, there's likely a few bugs in this first version, but it can be considered pretty much feature-complete, and maybe you'll appreciate it. Let me know if you have any questions or opinions on it, and if you'd like to propose any changes to the program, you can do so through the gitlab project site (or I guess you can mention things in this thread, but I'd rather not hijack the thread). I made it for myself, but then I thought maybe other folks might find it useful, so if anyone else can get some use out of it then I'm happy.

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UPDATE 2021-01-07 - Linux and Windows x86_64 binary builds are now available with each new release from now on, so you don't have to compile from source yourself (now at v0.1.6):
https://gitlab.com/defcronyke/signal-gen-cjds66/-/releases

sergio.fink:
Hellow people. I bought the JDS6600 and I have a problem with its CH2. I configured the CH1 and CH2 with a 50Hz sinoidal wave. I pluged in both channel 2 oscilloscope probes. In CH1 in the oscilloscope appears the correct waveform but in CH2 appears only a 5V DC level. Anyobe can help me about it?

Zenith:
Put it on a bench. They don't work well glued to the ceiling.  :-DD


Is it new or used?

Have you changed the channels around? Do you have one of the channels of the scope set to ground?

You have probes connected to the scope and cables from the sig gen. The connection between the two is out of sight. Is it sound? Have you tried using just the cables or just the probes? Does CH2 of the sig gen produce anything apart from DC when it's set to any waveform or when it's the only channel active on the sig gen.

Try the simple things first and work through it. I suspect there's nothing wrong with the sig gen or the scope and this is something basic.




MarkMLl:

--- Quote from: caned on October 02, 2017, 03:53:08 pm ---I am assuming this means that a function generator with SYNC/TTL output generates a pulse at the very beginning (0 degrees) of a waveform, which in turn could be used to trigger the sweep on the scope.

Does the JDS6600 have such a feature? I see a reference to the "TTL extension interface" in the manual, with signals TTL1 and TTL2, but no explanation of their function or usage. Are these signals equivalent to a "SYNC" output?

--- End quote ---

Belated comment: https://www.controller-designs.de/index.php?lang=de&cat=projekte&cont=jds6600_sweeper&sub= (in German, but easily translated by Google) describes an add-on box which in some unspecified way sweeps the JDS6600 and also emits a sync pulse. It uses the TTL port for control, and I suspect that what it's doing is sending a rapid stream of commands to shift the frequency by some increment.

As far as I can tell, the signals on the TTL port are primarily to allow the JDS6600 PCB to be integrated into other testgear etc. so I expect the Rx and Tx signals to have the same level of control as the USB port (this is something I've spent substantial time on over the last few days). As such, it /might/ be possible to do a "barely adequate" sweep on one of the outputs, and to put a sync pulse on the other either by using the burst facility or by manually ackling it (DC voltage with changing offset).

Whether the amount of work required to do this, when compared with the price of a more capable instrument, can be justified... is moot.

MarkMLl

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