In the previous pages you might have seen a Matrix oscilloscope sitting on top of the SunMoon load tester. Not only has the CompuNurse been upgraded, but the O-scope has been upgraded as well.
I wanted something that would allow me to capture o-scope readings so I could add them to my reviews.
Above is my newest toy: The USB-Instruments Stingray DS1M12 2+1 channel PC digital oscilloscope. This $220, palm-sized device actually replaces the $1000 desktop oscilloscope.
The BNC cable from the Waveform Monitor output of the load tester goes to the Stingray. The Stingray interfaces with a PC with a USB cable. The data is displayed on the PC either via Easy Logger or EasyScope II.
Above is a screenshot of the DataLogger program.
The photo above shows how easy it is to change the value of X axis.
Above shows how the Y axis values and scale are changed.
EasyScope II puts all of the necessary controls on one screen. The above shot shows an interface that is very similar to a real-life, single channel oscilloscope. For the second channel, one simply clicks on the “Channel B” tab.
Setting up persistence can help log changes over a long period of time as a more solid line.
The FFT display was fun to work with. I never did figure out how to lock the maximum mV reading, but then again I haven’t read the manual yet. 😉
Above, the FFT display is shown with a magnitude spectrum.
Here the FFT display is displaying a phase spectrum.
EasyScope even allows the user to view results with an analog output.
Overall, I think I might have a pretty good testing methodology in place. Now I’m not only able to test PSU’s at a higher temperature without cranking up the heat in the house, but also capture how “clean” rail output is.