Hi Plasmateur,
I can't figure out your setup from what you're describing, or why in the first case you're getting a stable signal, because you shouldn't, not unless some other conditions are met.
Now.. I might have gotten this wrong, but it sounds to me like you only want to pulse those signals when they are in phase. If that's the case, then there are more ways of going at it, but it depends on what the requirements are. Are you looking for a piece of lab equipment that can do this, for a component or for an entire solution? What are the constraints, budget, etc?
I guess what I'm trying to say is that more context would help
Hey. Thanks for replying! I'll try to provide more context.
I uploaded an example of what I am seeing on my oscilloscope. The upper left picture shows the signals I would see after a single pulse. There is a 90 MHZ signal and a 91MHz signal.
Upon a second pulse you can see that the phase of the 91MHz signal is at a different location.
If I continue to pulse, then the 91MHz averages towards zero.
This is the case with my lab equipment. I need to be able to pulse in such a way that the 91MHz signal is at the same phase every time.
Now if I did this with a 90MHz signal and a 100MHz signal, there wouldn't be a problem because it is a multiple of the reference clock - 10MHz. The dual signal generator that is producing the 90MHz and 91MHz signals is referenced to the 10MHz clock of a pulse delay generator.
So the only way I can think of to make it so I can pulse these signals multiple times without the 91MHz signal averaging out to zero, would be able to know the clock cycle of the 10MHz. If I can count the clock cycles and send a pulse to trigger the dual signal generator at the correct time, then I should be able to make sure both signals are at the same phase, at each pulse.
If there is better terminology to describe what I'm getting at, I apologize for not knowing it. I hope this better conveys the problem I am facing.