I also want to be able to easily repeat this exercise, as I adjust a pot to change the length of the pulse generated by the multivibrator.
I also want to be able to easily repeat this exercise, as I adjust a pot to change the length of the pulse generated by the multivibrator.You're most of the way there, single shot mode (or triggered but not using auto-trigger) is the start but the scope will not adjust the horizontal time to match your signal, you need to set the horizontal time to the range you need before making the trigger. The automated pulse width measurements of the scope should make easy work of a simple pulse such as this once its captured with a sensible horizontal timebase.
I also want to be able to easily repeat this exercise, as I adjust a pot to change the length of the pulse generated by the multivibrator.You're most of the way there, single shot mode (or triggered but not using auto-trigger) is the start but the scope will not adjust the horizontal time to match your signal, you need to set the horizontal time to the range you need before making the trigger. The automated pulse width measurements of the scope should make easy work of a simple pulse such as this once its captured with a sensible horizontal timebase.
I can't figure out how to actually trigger it to start measurement in single-shot mode (nor how to reset it if a measurement is present).
I can't figure out how to actually trigger it to start measurement in single-shot mode (nor how to reset it if a measurement is present).
I have a monostable multivibrator that generates a pulse. I want my DS2072A oscilloscope to measure the length (in seconds) of the (high part of the) pulse generated by the multivibrator.
I can't figure out how to actually trigger it to start measurement in single-shot mode (nor how to reset it if a measurement is present).
The scope will trigger in single-shot mode when the input signal exceeds the trigger level setting. To reset it, press the "single" button again, and the screen will clear and the scope will wait for another trigger event.
What kind of pulse duration are we talking about?
Here's a single-shot capture of the pulse from a 555 based monostable multivibrator. I set the horizontal trigger ("delay" or whatever your scope calls it) at the first division from the left edge, set the vertical trigger amplitude to 1 volt, pressed the "Single" button on the scope, then triggered the multivibrator. The scope triggers when the pulse exceeds 1 volt, and places that edge where I told it to with the "delay" or horizontal trigger position setting. Then the sweep continues on to the right edge of the screen, and stops. Since I have some idea of the pulse length, I set the horizontal timebase so that the full pulse will be displayed on the screen in a reasonable manner.
I have a monostable multivibrator that generates a pulse. I want my DS2072A oscilloscope to measure the length (in seconds) of the (high part of the) pulse generated by the multivibrator.I can't figure out how to actually trigger it to start measurement in single-shot mode (nor how to reset it if a measurement is present).
It sounds like you are trying capture long (seconds) pulses. One thing to watch out for when trying to single shot capture on slow time base is after you press the single button it can take a while before the scope is ready to actually trigger on your waveform. Forum member marmad talks about it in this thread https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/msg515875/#msg515875 . You can shorten the time it takes for the scope to be ready to trigger by moving the trigger position over to the left side of the screen by using the horizontal movement knob.
On the top left of the screen where it shows Run/Stop (and other things), when you first press the Single button it will show "RUN" in green. While the scope is in that state its not ready to trigger on your signal (it is still recording the signal though).
Once the "RUN" changes to a green flashing "WAIT" the scope is ready to trigger and capture. At that point you can start the pulse from you multivibrator and if your trigger is setup correctly the scope should trigger and then display the captured waveform.
Edit: Meant to mention that once the scope is in the "WAIT" state it will wait indefinitely until the waveform meets the trigger conditions. You don't have to try and send your pulse immediately after pressing the Single button.
It is definitely confusing at first. I initially thought the same thing and made the same mistake. On fast enough time bases you dont even notice because it gets to the wait state almost immediately after hitting the single button. But if you have the time base set to 1sec/div with the trigger position set on the center line (default) it can take up to 7 seconds after you press the single button before the scope is ready to trigger/capture.
It is definitely confusing at first. I initially thought the same thing and made the same mistake. On fast enough time bases you dont even notice because it gets to the wait state almost immediately after hitting the single button. But if you have the time base set to 1sec/div with the trigger position set on the center line (default) it can take up to 7 seconds after you press the single button before the scope is ready to trigger/capture.
I guess the scope could be ready to trigger after run was hit and then only display the actual pre-trigger buffer that was captured, I'm not sure what other scopes do.