In the past I have used the HP8753B mostly for impedance measurements. Recently I have needed to do cable measurements using the built-in option 010. One big problem: I cannot get the stop time to set for more that 67ns. No matter what I enter on the keyboard, it always defaults to 67ns. I tried different menus and settings and nothing changes that. This is a big problem and prevents me from looking at more that a few meters of cable. I hope someone can give me a solution or at least tell me if their unit does the same thing.
broadcastRF
broadcastRF
Increase the number of points in the trace, or
Set the frequency span to a smaller value.
Basically, the max stop time is controlled by the frequency step size, that is: (freq span) / (# of points -1).
The smaller the step size, the farther out in time you can look before aliasing.
More info than you wanted to know is in application note 1287-12