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Uni-T’s Ultra Phosphor UPO2104CS 4-channel, 100MHz, 1Gsamples/sec DSO uses Spartan-6 FPGA to capture 30K waveforms/sec

Xilinx Employee
Xilinx Employee
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Last month, Dave Jones tore down yet another low-end DSO—the Uni-T Ultra Phosphor UPO2104CS 4-channel, 100MHz, 1Gsamples/sec scope—on his EEVBlog Web site and he found a Xilinx Spartan-6 FPGA inside. (It appears in the video at 22:00.) The Spartan-6 LX45 FPGA manages the DSO’s sample memories which include a fast SRAM and an SDRAM.




Uni-T UPO2014CS DSO.jpg


Uni-T Ultra Phosphor UPO2104CS 4-channel, 100MHz, 1Gsamples/sec DSO





Here’s a photo of the Spartan-6 LX45 FPGA on the DSO’s main board.




Uni-T UPO2014CS Spartan-6 detail.jpg 


Spartan-6 FPGA detail from Uni-T Ultra Phosphor UPO2104CS DSO

(Photo courtesy of Dave Jones)




As with many DSOs that Dave Jones has torn down, the Spartan-7 FPGA manages the flow of captured data from the DSO’s 1Gsample/sec ADC and through the DSO’s sample memory. As a result, the scope can capture 30,000 waveforms/sec and it can capture as many as 65,000 waveform frames in its SDRAM capture buffer. In the image above, the length-matched signal lines emerging from the top of the Spartan-6 FPGA lead to the fast SRAM capture memory and the length-matched lines emerging from the bottom of the FPGA lead to the SDRAM waveform memory.


Here’s Jones’ 33-minute teardown video. The Spartan-6 FPGA appears at around 22:00 in the video.








Uni-T’s UPO2104CS DSO currently sells for $538.88 on Banggood.com.



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