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Chapter 6 219
Analog Measurements - Screens and Control Fields
Control Fields for Analog Measurements
Trig-Delay
The trigger delay is used to specify the time relationship between the
trigger and displayed signal.
• Positive values delay the measurement trigger by a specific period.
The delayed trigger point is the left edge of the screen.
• Negative values perform a pre-trigger function, displaying a section
of the waveform before the trigger point. The trigger point is
indicated by small pointers that appear at the top and bottom of the
screen.
Operating Considerations
Negative Value
The maximum negative delay cannot exceed ten
divisions of the current time-per-division setting. For example; if the
Time/Div field is set to 1 ms, the maximum allowed negative delay is
−10 ms. Larger negative numbers cause an Excessive negative
Trig-Delay will be truncated. message.
Positive Values
For Time/Div settings of 50 µs/div and smaller, the
maximum delay is 400 ms.
For Time/Div settings of 100 µs/div and larger, the maximum delay is
3300 ms.
Resolution
For delays of 400 ms and less, the resolution is 6.4 ms. For delays
greater than 400 ms, the resolution is 51.2 ms. All entries are rounded
to the nearest multiple of 6.4 ms or 51.2 ms (depending on the delay
value).
Screens on which this field is displayed
SCOPE: trigger controls menu