Operation
Each
input to the A/B logical
AND
or logical OR is TRUE with + SLOPE
and
a trigger-source voltage above the trigger level or with - SLOPE and a
trigger-source voltage below the trigger level.
When the B Sweep
is
triggered by the
WR,
delay-time
or
delta-delay-time
time
is
measured by the crystal-controlled timer. With any other logic-trigger
function, delay-time
and
delta-delay-time measurements are derived from
delay settings or cursors.
Selection
Triggers
A'B
A Sweep
A+B
A Sweep
A:WR A Sweep
B:WR B Sweep
Table 2·4
Sweep Triggering
When
AND
of A
and
B Triggers
A:A'
B
FALSE to TRUE.
changes from
OR
of A and B Triggers
A:A+B
changes from
FALSE to TRUE.
Word Recognizer detects the selected word.
Word Recognizer detects the selected word.
Cancelling Menu Functions
To cancel any function selected through the menu, press the A/B/MENU
button to light the MENU indicator, then press the lower Trigger-MODE button.
When a menu
is
displayed, you can either press the lower Trigger-MODE
button to escape the
menu
and
deactivate
all
menu-selected functions or press
the upper Trigger-MODE button to step through the menu levels and restore
the previous measurement.
When a
logic trigger
is
active, selecting AUTO LVL Trigger Mode displays
the Main Menu.
2465A/2455A/2445A Operators 2-29
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