Interleaved, at least what I can answer
On 4/23/2022 7:50 PM, jimbert4 via groups.io wrote:
1) The procedure calls for a Time-Mark Generator. Is this really just a pulse generator? What is the pulse width?
Tektronix time mark generators can put out narrow spikes with a sharp leading edge (so you can tell where it is).? They generally have intervals from 1 ns down, although the 1,2 and 5 ns pulses are more sinewaves than not.
2) Is the Time-Mark a positive pulse, i.e. it does not go below gnd in its low state?
Wouldn't matter if it did, all you're looking at is the interval between leading edges.
3) What should the amplitude of the Time-Mark be set to?
Enough to give you a good presentation.? The idea is time and risetime, not amplitude so much.
4) The procedure says to adjust the deltaREF control to intensify the 2nd (for example) time marker and adjust the delta control to intensify the 10th time marker. Okay, I understand that. Then it says to superimpose the delayed B Sweep time markers within 0.2 division. Not sure about this. I see the 2 magnified (B?) sweeps, so am I supposed to adjust them to align the edges on top of each other? Is that like a fine control on adjusting the times? Does it matter which delta control(s) I use to make this fine adjustment?
This has been covered in similar questions, you might try 2465 calibration.? Since I don't have one, I've not studied the procedure.
5) The final Time-Mark setting is for 20ns (50MHz). My waveform generator only goes to 30MHz. Could I use a 40ns (25MHz) square wave and count edges instead of time marks?
I suspect so, but it needs to be 50% symmetric as a good guess.
Harvey
