A lot of cheap PSU's chuck out terrible RF noise. A quick look online shows that the one you've found is bad for this and also has a very annoying "beep" every time you move a knob:
"There is no reason to buy such PSU. First of all, this is switching power supply, and this means that it's output is very noisy, it produces high EM interference for nearby equipment. And it's max current is just 10 Amps which is almost the same as for popular linear PSU with 5-10 Amps. In addition this is a cheap Chinese switching mode PSU, which means that it is even more noisy than branded PSU, it produce more EM interferences, has unstable output and is not reliable. This is just a noisy kids toy.
And after all, such cheap switching mode PSU may be unsafe for your life and equipment. Because it uses cheap components on a "hot" (high voltage) part of circuit." That was one review.