DDS140 PC-Based USB Oscilloscope 40MHz Bandwidth 200MS/s Black

brand: SainSmart 1 review SKU: 101-10-144 Variants ID: 45100759444

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If you're looking for A USB Oscilloscope that supports win10, click:

VDS1022 25MHz 2+1 Channel PC USB Oscilloscope, MIT USB Isolation

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If you're looking for A USB Oscilloscope that supports win10, click:

VDS1022 25MHz 2+1 Channel PC USB Oscilloscope, MIT USB Isolation






USB 2.0

Number of Channels




Maximum sampling rate

200M sps (single), 100M sps (dual channel)

Vertical resolution

8 bit


1K Hz, 3.25V level standard reference square wave output

Voltage range

±5v,can be extended to ± 50v through X10 table pen, extended to ± 500v through X100 table pen 

Noise size


1v/div Stalls


500mv/div Stalls


200mv/div Stalls


100mv/div Stalls


50mv/div Stalls

Trigger coupling

AC AC-coupled, DC DC-coupled

Triggering conditions

Trigger level + rising / falling-edge trigger


Auto, Normal and Single Trigger

Input impedance

1M / 25pf

Memory Depth

64k Byte


< 2 W



Automatic measurement

Maximum, minimum, peak to peak, frequency, average, RMS, rise time, Positive Width, Negative Width, Duty Cycle


12 cm X7.5 cm X2.5 cm


  • 1X SainSmart DDS-140 PC-Based USB Digital Storage Oscilloscope
  • 1X User's Guide
  • 2X Oscilloscope probe (x10)
  • 1X USB Cable
  • 1X CD (manual Software etc.)
Customer Reviews
3.0 Based on 1 Reviews
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good for learning or playing, but I can not recommend for real work

I bought a DDS140+function generator 2 month ago. First I have a problem installing, because it wont work in any usb 2.0 port, in my case on my lenovo laptop it works only 1 usb out of four. The support did not answer at all, so consider, there is no suppurt! The hardware anyway could be good, but the software is an awful one. It freezes a lot, I always have to **** then restart, and measurement in screen is useless. I got the newest software on the CD, version 1.4, but in the web the newest version is only 1.2 I measure 50Hz from the wall outlet with a 1:100 probe, and in measurement window it dislplays it is 50Hz, in the screen measuring between the two point it measures 22ms, which is definitly not 50Hz. It is not a hardware problem, it is just the software, but the point is bying a digital storage oscilloscope is, exact measuring. This is the weakest point. Software is bad, no support, no updates. :( I wont buy it again this product.