On Sat, 30 Jun 2018 09:36:32 -0700, you wrote:
Good info Harvey!
Thanks. I do have both, had to do a lot of swapping to get them
running, mostly the HV boards and a horizontal amplifier.
The 1503 puts out a half sine pulse generated by a transistor, it is
much less subject to damage. You get the traditional pulse up/down
view of the cable.
However, the TD version (1502) puts a step on the waveform and has a
different presentation. Because the TD is wired directly across the
input/output to the cable, it is quite vulnerable.
IIRC, the 1503 has a series capacitor.
Harvey
And the truth of it is that it's really good to have both a 1502 and a 1503. The 1503 was intended for looking at much longer distances and it quite useful for stuff like long runs of twisted pair (telephone/etc) wiring. I use my 1503 at an equestrian center for scoping out buried wiring (700 - 800 feet long) that controls pasture watering stations. Also handy for looking at long runs of CAT5 and/or of course, coax.
The resolution of the 1502 is really nice, though, when you don't need the long distance capability.
Tom
