I asked the seller and was told that it comes up that way and that's why they're selling it "for parts".? It must be some sort of modification to either route the calibrator directly or, perhaps, something added to the vertical amplifier.? Who knows but it did catch my eye.
BTW, I have several Tektronix scopes and none of them do that but, perhaps, there are some models that do.? I don't know.
No, the calibrator is a separate circuit (schematic typically has it on the same page as the power supply). It has to be externally connected to a ¡®scope input. All my HP scopes are that way. I think Tek made scopes with a switch you could push to internally connect the calibrator¡ªbut I¡¯ve never had one so I¡¯m not sure.?
On Fri, Mar 22, 2024 at 7:51?AM n4buq <n4buq@...> wrote:
I was looking at ads for an HP140B and saw this one:
Is there a way to have the calibrator signal displayed without using the vertical amplifier's input connections?
I have one of these scopes that I hadn't used for several years so I pulled it onto the desk and I just don't see if/how there's a way to do that.? Anyone know?
