Got my DWO3s a few days ago and logged enough time to think I might be able to ask intelligent questions.
First and foremost, how do I get vertically oriented bars, scrolling left / right? Should be the Range selector at the right-most position, right? I’m not seeing the frequency stabilize anywhere near horizontal scan rate. Am I doing it wrong? Video format is 1080i59.
No problem getting horizontally oriented bars, scrolling up / down.
This is pretty important to me. If it’s not possible, then I will be very disappointed. My dim memory of the Hearne / EAB Videolab II from 30 years ago was that this was super easy, the oscillators had coarse and fine controls.
Second, what’s the process for getting a Reset that just does a reset, without blanking the oscillator? The blanking effect is cool, but not what I want at the moment. I’m assuming the Reset input is a gate? Positive voltage blanks the oscillator off. When voltage goes back below a threshold, the oscillator starts up again at phase = 0. Right? And that threshold is… 0.5 V?
This would seem to indicate that in order to just reset the clock, without blanking it off, I need a trigger pulse. Hmm. I actually don’t have that in my system. Plus, I suspect that there’s always going to be some amount of blanking, because a trigger pulse has to have some duration. There’s no such thing as instantaneous. I just want the oscillator to sync to an arbitrary incoming signal without blanking. What’s my move here?
Third, in the video below, we can see some noise, a subtle jitter. The video compression does soften it up somewhat, but it’s there. DWO3 directly into ESG3. It’s pretty obvious in full screen / HD.
Also, this is a square wave and it’s really soft. I guess that is just something I have to live with in high definition formats. The internal components of these modules just aren’t fast enough to resolve a transition from zero to one anywhere near the HD pixel clock.