I just got started doing some tests with my DHO914S
Using mouse combined with HDMI out is workable, using the web could lag up to 2 sec but could be fast enough, it's not a fixed latency.
I do use the phone or tablet to take screenshots, take screenshot and then long press in browser download image on phone. (they are in jpg though not png, that should be an easy change)
-AWG: starting from 25kHz up to 50kHz it can't make up its mind about which rise time it is going to use, see screenshot.
min 7.3ns max 11ns
-I connected the trigger out to the input, looks like a delay of 419ns (see screenshot)
The cursors are the jitter range 6ns
-I don't have a fast edge pulse generator but the DG4000 sync out gives me 2.14ns (160Mhz)
(I don't know what the rise time is of the DG4000 sync out, 1ns?, so 250Mhz BW seems possible)
P.S my tek2465 died today, spark noises and smoke cloud, I wasn't completely surprised . I guess it couldn't handle the mental pressure of a third oscilloscope.