Consider the burst of three pulses in this signal. Suppose you want to get a closer look at the falling edge of the second pulse. Pulse-width triggering can be used to trigger stably on the first pulse (by looking for the "dead" time between repetitions of the pulse train), but cannot distinquish between individual pulses in the train. If we could delay the trigger for the time from the rising edge of the first pulse until the falling edge of the second pulse (about 985 µs), the edge we're interested in would be at the trigger point in the record, and we could easily zoom in on it by changing to a faster timebase. It is tedious to calculate how long the delay time should be, and enter it in to the "Delayed Runs After Main" menu. The TekScope's new "Set Delay with Cursor V Bars" menu command makes it possible to set both the delay time and the timebase to zoom in on exactly the part of the signal you want to see.

Adjust the scope as necessary to obtain a stable trigger, then turn on the V Bar or Paired cursors, and position them around the area of interest. In this case, use them to bracket the falling edge of the second pulse.

Pressing TekScope's horizontal "Menu" button will bring up the horizontal menu:

Pressing the rightmost bezel button activates the "Set Delay with Cursor V Bars" menu item, and the scope automatically adjusts the "Delayed Runs After Main" time, and the delayed timebase to put the area between the cursors at the trigger point. It's that easy!

With the menu removed, you can see that the scope is now using the delayed timebase, running at 50 µs per division. The falling edge of the second pulse is now at about the trigger point. From here, you can use the horizontal scale rocker to speed up the timebase and zoom in even more, or the "Set Delay with Cursor V Bars" command to keep the signal centered as you zoom in on it.

To zoom in further, position the cursors on either side of the edge, and again invoke the "Set Delay with Cursor V Bars" command from the horizontal menu...

...Now, the time base has been sped up to 5 µs per division.

If you want more detail, you can reposition to cursors and repeat the process...

...again and again...

Until the timebase is set to its fastest value.