Electronic – Old analog oscilloscope (Advance – Gould OS 240) front panel output

oscilloscope

I can't find the exact manual for this pretty simple old oscilloscope (pretty good functionally) – I've found some pretty similar ones, for other models – so I have a couple of questions regarding the front panel.

There is a small pin labeled Gate o/p. Is this something like a probe callibration output?
Next to it there is a "banana plug" socket input for external trigger (obvious) and ground. What is this ground used for (since there is a mains ground similar socket at the back panel)?

Here's a photo

Thanks in advance

PS. I found this info here https://www.electronicdesign.com/displays/cross-trigger-two-oscilloscopes-create-delayed-sweep-display Does it give any help or clue? Apparently it's a signal. It's a binding post that supplies a positive pulse for the duration of the timebase (according to the similar osc. tektronix's manual). Any idea how it can be used?

Best Answer

Just to answer the question... after finding, purchasing and reading the manual. ...According to the manufacturer: "This output provides a positive going sq. wave of approximately 20V amplitude from a source impedance of 15kOhm. Its freq. is dependant on the setting of time/div and is suitable for probe compensation. If anyone ever cares or needs the manual I can send the pdf. Thanks