I can share details from the testing I did on the new board revision. This is basically a report from shmups. So if you read my comments there, this is nothing new.
The most important thing, which I think is a question that current owners may have, is this board "better" than the last one? Yes and no. It's better in that it has the add-on boards already installed, but the output results are basically the same. Comparing the previous revision with both the FBX and FU-RGB boards to this new revision, the difference in signal quality is so minor that it can only be seen via machines. It will not be discernible by human eyes or ears. FBX can of course detail his thoughts on this as well.
On the video side the signal output is the same as using the FU-RGB. There is slightly less noise in the signal but that doesn't translate to anything noticeable on screen. The ~$300 question, should you replace your current board with the new one. Nope. If you already have the FU-RGB and FBX amp, you have the same thing for all intents and purposes. If you don't have the add-on boards and don't notice any of the issues, cool. You are all set still, just keep using your device and have fun.
I am not a member of TO. I have no insight into their operations behind the scenes. I do think that some credit should be given to Alex for coming on here and laying everything out on the table. Along with admitting that mistakes were made and they are learning from them. Does that forgive everything that has transpired? No. However, we all have the choice to decide if we want to continue holding onto the past or move forward.
If you hate TO, that's your right. If you love TO, that's your right too. I personally love what the SSDS3 represents/provides me. I am just glad that I will soon be able to maybe sit down and actually play some games on mine. Right after I finish the remaining installs for some of you. I hope everyone that owns one of these currently enjoys it, or gets to enjoy it now. For the people that held out and plan to purchase now, I hope you enjoy it too.
Below are scope plots taken from the original Rev2 SSDS3. Also a plot from the FU-RGB board output. Lastly a plot from the newest revision SSDS3 which has the FU-RGB and FBX circuits on board.
If you don't understand what these show. Look at the amount of fluctuations in the signal. The other part you can look at is the Amplitude value on the bottom of the window. The correct value for RGB signals on 75ohm impedance NTSC signals is going to be ~700mV Peak to Peak.
The important part to take away from these plots is that the newest revision of the SSDS3 produces what is essentially the equivalent signal. The variance between the FU-RGB and latest revision is all well within spec and reasonable in it's fluctuations. These captures were taken using all of the same hardware while displaying a white screen under load using the 240p test suite. The only difference was the SSDS3 unit from the first 2 plots to the last for obvious reasons. The test unit is a bone stock white PC Engine that is the noisiest internally that I own.
Original Red channel
FU-RGB board installed Red channel
Latest revision SSDS3 with built in FU-RGB and FBX circuits