| Products > Test Equipment |
| RD JDS6600 25MHz 2-Channel DDS AW Function Signal Generator |
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| RD Tech:
--- Quote from: trys on November 01, 2017, 07:00:03 pm ---I posted a screen capture of the 312V p-p mains leakage to the Ground pin of the PSU that came with the JDS6600 in the last post. The images for problems at low signal levels is given in the two attached photographs. The signal generated by the JDS6600 is set at 30mV, 1kHz One picture is a screen capture of the scope itself. One picture is of the JDS6600 showing the settings. Kind regards, Trys Hi Trys thank you for your reply you did not use our own AC-DC power supply ? from the picture, it should be power supply interferece , and there are some inerference in your working place please check and use our own power supply --- End quote --- |
| trys:
Hi, Yes it is your power supply that was supplied with the unit. I will also try to reduce environmental noise, as I suspect that may also be adding to the problem. The Function Generator is very good at higher amplitudes, it works very well and I find the controls easy to understand and use. Trys |
| RD Tech:
--- Quote from: trys on November 02, 2017, 11:38:52 am ---Hi, Yes it is your power supply that was supplied with the unit. I will also try to reduce environmental noise, as I suspect that may also be adding to the problem. The Function Generator is very good at higher amplitudes, it works very well and I find the controls easy to understand and use. Trys --- End quote --- could you make a video to show this ? |
| trys:
No, I do not wish to make a video. I have given screenshots of the issue, and a photo of the JDS6600 above the oscilloscope. I can post a photo of the power supply that came with the JDS6600 if you want? Thanks for trying to help. |
| trys:
The problem was environmental electrical noise / RFI. I turned off items in the home lab, and the problem was a small Class D amplifier ( PAM8403 ) causing much of the noise (see screenshot). I am now able to get a 20mV signal from the JDS6600. Screenshots below. Background noise screenshot; this is with the JDS6600 DC power jack disconnected - so it shows the environment noise being picked up by the test leads and equipment. Three screenshots, Normal mode (which shows also the environment noise), High Resolution mode, and Averaging mode (similar to an analogue oscilloscope). I am happy with the results, and I will continue to try and reduce electrical noise in my home lab now. Thank you for your help. Trys |
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