Operation
Totalize Random or Low Repetition-Rate Events
1.
Select the Totalize Count Mode, as described above, for frequency and
period counting.
2.
Move any front panel switch
to
reset the displayed count.
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.
The main menu comes up if you
select AUTO trigger with Totalize or AUTO
LVL with the Word Recognizer active. Selecting either LINE Source or SGL
SEQ
Mode cancels any counting measurement.
Delay Sweeps
by
Event Counts
The available Counter-Timer-Trigger
(CIT)
menu includes delay-by-events for either
the A
Sweep or the B Sweep. Event counting begins at a starting event on a vertical
input, defined by the A Trigger. Delay-counting events are defined by the B Trigger.
In
addition, the available Word Recognizer (WR) can define either start or delay-counting
events. The combinations available are shown
in
Table 2-3.
Which Sweep
to
Delay
When the A Sweep
is
delayed by events, the event count can accumulate
for unlimited time. Then the B Sweep can
be
delayed by time to magnify
waveform details.
When the B
Sweep
is
delayed by events, the event count must accumulate
during the A Sweep. Then the intensified A Sweep can show the timing
between the start event and the
delay count.
2465A/2455A/2445A Operators 2-23
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