LeCroy LSA1000, Operator'S Manual

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About the LSA1000
Trigger Modes
STOP This command halts the acquisition in any of the three re-arming modes:
Auto, Normal or Single. Issuing the STOP command prevents the LSA1000
acquiring a new signal.
Issue STOP while a single-shot acquisition is under way and the last
acquired signal will be kept.
AUTO
In Auto Mode: the LSA1000 automatically captures the signal without waiting
for a trigger.
NORM In Normal Mode, the LSA1000 will continuously capture the signal as long as
a valid trigger is present. If not, the last signal is preserved.
SNGL In Single-Shot Mode, the LSA1000 waits for a single trigger to occur, then
captures the signal and stops acquiring.
DELAY Used to adjust the pre- or post-trigger delay. Pre-trigger adjustment is
available from zero to 100 % of the full time-scale in steps of 1 %. The pre-
trigger delay is illustrated by the vertical arrow symbol at the bottom of the
grid. Post-trigger adjustment is available from 0 to 10 000 divisions in
increments of 0.1 of a division.
TIME/DIV Selects the time per division. Each acquisition has ten divisions.
LEVEL Adjusts the trigger threshold. The amplitude of trigger signals and the range
of trigger levels is limited:

4 screen divisions with a channel as trigger
source; the full scale range is divided into 8 divisions. Inactive with EXT as
trigger source.
The trigger sensitivity is better than a third-of-a-screen division.