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3B5: Difference between revisions
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i.e., waiting for trigger, sweeping, resetting, and waiting for trigger in an endless loop. | i.e., waiting for trigger, sweeping, resetting, and waiting for trigger in an endless loop. | ||
For example, say the 3B5 window is three divisions and the input signal is 1 kHz. | For example, say the 3B5 window is three divisions and the input signal is a 1 kHz square wave, and rising edge triggering is selected. | ||
The user engages SEEK mode. | The user engages SEEK mode. | ||
# The sweep seek state machine sets the sweep speed to 5 sec/div. Three divisions at 5 sec/div is 15 seconds, so the time window | # The sweep seek state machine sets the sweep speed to 5 sec/div. Three divisions at 5 sec/div is 15 seconds, so the time window begins at the rising edge event that caused the sweep to start, and ends 15 seconds after the that event. The second rising of the 1 kHz occurs after 1 ms, so it occurs within the time window. Therefore, the sweep speed is advanced to 2 sec/div. | ||
# At 2 sec/div, the window is 6 seconds. 1 ms < 6 seconds; sweep speed is advanced to 1 sec/div. | # At 2 sec/div, the window is 6 seconds. 1 ms < 6 seconds; sweep speed is advanced to 1 sec/div. | ||
# At 1 sec/div, the window is 3 seconds. 1 ms < 3 seconds; sweep speed is advanced to 0.5 sec/div. | # At 1 sec/div, the window is 3 seconds. 1 ms < 3 seconds; sweep speed is advanced to 0.5 sec/div. | ||