Minus 1 point for the software, minus 0.5 for the encoder feel.
Like most Chinese-manufactured test equipment, the hardware is only as good as the software driving it. The DDS140 uses the ubiquitous . sainsmart dds140
At low frequencies (<1 MHz), it’s clean and stable. Square wave rise time is ~15 ns – decent for digital logic up to a few MHz. Sine wave THD is about 0.8%, fine for audio and most analog experiments. Minus 1 point for the software, minus 0
Out of the box, the DDS140 is undeniably compact. It fits in the palm of your hand, making it significantly more portable than even the smaller handheld scopes. At low frequencies (<1 MHz), it’s clean and stable
If you’ve ever wished for a $50 signal generator that feels like a $200 tool, the DDS140 is your new bench companion. It’s not perfect, but it’s shockingly capable.