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FUNCTION REFERENCE 5 - 37
Key sequence:
HOLD OFF
Description:
The HOLD OFF control determines the hold off time.
In the analog mode, the hold off time is an additional ‘dead’ time after each
timebase sweep during which the MAIN TB trigger is inhibited. Variable HOLD
OFF enables the user to synchronize the display rate to the signal being
examined. This eliminates the problem of ‘double’ triggering on pulse train
information as shown in the figure.
For most signals the hold off must be minimal (0%), so that the sweep repetition
rate can be the highest permitted by the trigger signal. Turning the HOLD OFF
control clockwise increases the hold off time. When the hold off time is set longer
than is necessary to synchronize the signal, loss of light output will result.
In the digital mode, the variable hold off time serves a similar function, and the
extra time is used for processing previously captured data.
In digital mode, triggering on certain pulses can be achieved via the logic trigger
mode ’pattern’. For details refer to the LOGIC TRIGGER function.
Toggle key to select positive or negative
glitch detection.
Toggle softkey to select positive or
negative glitch detection.
Softkey pair to select the additional trigger
condition.
Control to adjust the conditional time or the
beginning of the range.
Control to adjust the end of the range.