I received my DHO1074 today and decided that a quick pre-Christmas incoming inspection was in order.
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/xsmiley.gif.pagespeed.ic.R8GFI-pF6f.png)
The unit I got (from Rigol Europe via Amazon) was manufactured in December 2022, calibrated in January, and still came with the original firmware 2.04. So as we suspected, these have not been flying off the shelves at list price...
After upgrading to firmware 2.11, self-calibration did a better job than it had before -- no more offset errors, which were up to 100 µV with the original firmware. I also managed to actually get 2 GSa/s sampling rate with the updated firmware, much to my relief -- acquisition always seemed to run at half the advertised rate before?!
Not sure what's going on with the options. The scope tells me I have "limited" 200 MHz and 100 MPts options, but they don't seem to be active at all? Anyway, I intend to un-limit them after Christmas...
The screen and LEDs are plenty bright for my taste and lighting conditions; I reduced the screen brightness to 75% and wish I could do the same for the LEDs. The optical encoders feel great and the UI's response to user interactions -- whether via the touch screen or controls -- is very smooth. So the scope fully lives up to the expectations I had based on videos.
I like the UI very much; the dual flex knobs with their dynamic change of function based on which dialog fields you touch works great for me. Startup time is only 30 seconds, quite a bit faster than the DHO800/900, presumably due to a faster CPU and/or flash disk.
Fan noise is the fly in the ointment for me. The dual fans are quite noisy indeed: I can't hear whether my SDG2042X is on or off when the DHO is running next to it, and that signal genererator is not the quietest of instruments. My Korad power supplies, when running under load, can get louder than the DHO -- but that is not an ambitious comparison...
After Christmas I will definitely try the PWM adjustment to reduce the fan speed. For now, the scope is going back into its box and I will do my best to forget about it and be pleasantly surprised a month from now!
![Wink ;)](https://www.eevblog.com/forum/Smileys/default/xwink.gif.pagespeed.ic.cldandycH0.png)