Here is a nice mini review of Siglent SDS1204X-E four-channel oscilloscope by Harry Baggen @ elektormagazine.com:
A few years ago I wrote a review about the Siglent SDS1102X and back then I was very enamoured by the quality and extensive capabilities of this affordable instrument. In the meantime there have appeared a few successors in this series of mid-range oscilloscopes by Siglent and here I’m looking at a somewhat more expensive, four-channel model that has been available since the beginning of 2018, the SDS1204X-E. When it comes to the design and feature set this is very much a continuation of its predecessors. The most conspicuous change compared to the 1100 series is the increased bandwidth of the input stages, these are now 200 MHz (was 100 MHz earlier).
Review: Siglent SDS1204X-E four-channel oscilloscope – [Link]
Can you tell me which oscope or scope specs you recommend for working on industrial electronic controllers