| Products > Test Equipment |
| RD JDS6600 25MHz 2-Channel DDS AW Function Signal Generator |
| << < (9/44) > >> |
| pascal_sweden:
--- Quote from: pantelei4 on July 13, 2017, 12:32:26 pm ---The device has a very poor Electromagnetic compatibility, Interference is caused by DC / DC motherboard converters. This is noticeable immediately after switching on, if we put a probe next to it. Sensitivity 500uV / div Bandwidth 300MHz The probes of the oscilloscope are connected to ground, there is no signal at the input, noise JDS6600 is very high. --- End quote --- Maybe it's because of your lousy way of connecting the probes to the signal generator. Why on Earth don't you have decent BNC cables? First time that I see a Rigol DS2000A user (supposed to be professional player) without decent cables :) |
| pantelei4:
--- Quote from: pascal_sweden on July 14, 2017, 07:37:42 pm ---Maybe it's because of your lousy way of connecting the probes to the signal generator. --- End quote --- Of course yes. If you turn on the bandwidth of 20MHz, interference will become significantly less. But connected in the same way to the MHS5200A, with a full bandwidth there is no interference from the DC / DC converters of the motherboard. The JDS6600 has a noise of the ground, With a repetition rate of 400kHz and a spectrum wider than 100MHz. I consider this a design error. The video was shot specially to show it. |
| pantelei4:
--- Quote from: pascal_sweden on July 14, 2017, 07:37:42 pm ---First time that I see a Rigol DS2000A user (supposed to be professional player) without decent cables :) --- End quote --- I'm not a professional, just an amateur. :) Two signals, small approximately equal level. Yes, the ground clamp loop catches radio interference, which creates a power source. Now I need to think about how to reduce EMI, when the developer should take care of it. JDS6600 Analog no name. |
| pascal_sweden:
If I am correct, the actual designer of this signal generator is in this thread. Maybe you can PM him with your suggestions to further improve the design. I will wait ordering the device until the Mark II version becomes available :) |
| pantelei4:
--- Quote from: pascal_sweden on July 14, 2017, 10:40:06 pm ---If I am correct, the actual designer of this signal generator is in this thread. Maybe you can PM him with your suggestions to further improve the design. --- End quote --- Probably the designer needs to study AN139 - Power Supply Layout and EMI http://cds.linear.com/docs/en/application-note/an139f.pdf Why should I pay for other people's mistakes, and then help solve the problem? |
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