(Context is using a Tek 465 to look at a narrow PPS.) davidwhess@gmail.com said: >> Now turn up the Intensity until you can see the pulse. It might >> help to turn down the room lights. > This is the problem. With a 1 second repetition rate, the brightness is > going to be very low. For me, the picture is just a flash every second, but my eye/brain can easily remember enough to figure out what's going on. If I turn the intensity up enough, the beam in the idle position bleeds through the blanking and you can see where it is resting. (For things like this, I set the horizontal position with the beam well on screen.) With that as a starting point, it is easy to estimate the pulse polarity, height, and width. If you want to look at a detail, you have to look at the right place on the screen and wait for the next flash. It may take several tries and/or a bit of practice. Yes, I would go nuts if I had to do this very often, but it's good enough for occasional use. -- These are my opinions, not necessarily my employer's. I hate spam.