New member here and a huge amount of appreciation to all contributors for so many interesting comments over the current 31 pages, it must be quite a surprise to find so many following for so long Gyro? The level of expertise shown by so many, is quite reassuring and having worked in electronics for my whole career, although now retired, it shows how much dedication so many have for the subject. I've recently been playing with micro-controllers to improve certain features of my old property and add some smart systems. My old oscilloscopes have seen better days, both sporting Advance logo's but one after Gould took over, although both names were added to the front panel. One is analogue and the other the 1st digital scope Gould made, being the OS4000, sampling at 1.8MHz. They claim it manages to display a bandwidth of just over 400kHz, although has a 10MHz front end for the analogue display. They all used to be mixed signal 'scopes during that phase. They have both served me well but I was struggling to verify some of the new hardware I'm using, as well as having several faults that appear every time I actually need them, so decided to get myself a cheap small unit as I'm trying to stop filling the house even more than it already is! I visited many sites but this was the one that gave me the best insight, although I'd seen it on the digital basement review 1st, so both areas had my respect.
I only received it yesterday but it is indeed impressive for the price and does do what the makers claim, not a normal experience for most of the far eastern imports, who shall remain nameless.
I started with florent's SW, which I am also appreciative of, it is an impressive feat, although I know that many have helped contribute to the project. I spent an afternoon running around the various features and got excited as each had such capability beyond something at this price point. Today, I coupled up one of my experiments and decided an external trigger would be useful. I noted the multi channel automatically switched to "external in" and being TTL, only edge trigger is available, both what I needed. It was the 1st item that I'd tried that didn't go as planned. No triggering at all and to cut a long story to the chase, I found that the multi channel appears to load the circuit, as though it is still switched as an output (I'd used it during my familiarisation to see the trigger output delay), as when attached to the probe calibrator, the signal no longer swings to zero, being around a 2.5v to 5v square wave instead. I tried pre-switching it to an input, prior to selecting it as a trigger source, as well as several other combinations. It isn't a show stopper and didn't curb my admiration for all that has been done but perhaps somebody might confirm my findings and make sure it isn't something peculiar to my unit or circumstances. My unit is the VDS1022I and I have checked all the grounding arrangements. Removing the ext connector returns the probe output back to normal.
I will end there, as it is already long for a 1st comment but I'm glad to be part of this community and a rather pleased owner of the device too!