Operation
Logic Triggering
The available Counter-Timer-Trigger
(CIT)
enhances trigger selectivity. Sweeps
can
be
initiated by combinations of two vertical signals, defined by A Trigger and B
Trigger. The available Word Recognizer (WR) expands logic triggering to 17 -bit
patterns, either synchronous or asynchronous.
Initiate a Sweep with the Logic Trigger
2-28
1.
Activate the
CIT
MENU.
a.
Select
an
A-Sweep display. (You can press AUTO Setup and push the
SEC/DIV knob
in
to force the A Sweep on.)
b.
Press A/B/MENU to turn on the MENU indicator
and
Main Menu:
COUNT
DL
Y /EVTS LOGIC-TRIG
RES
2.
Turn Left-MENU-SELECT to position the cursor under LOGIC-TRIG.
3.
Push
the upper Trigger-MODE button to display the Logic Trigger Menu.
a.
Without the
WR:
TRIG
A
SWEEP
BY
<A·B
A+B>
b.
The
WR
adds two functions and changes the menu:
SWP:TRIG
<A:A·B
A:A+B
A:WR
B:WR>
4.
Turn either MENU-SELECT to select the sweep to trigger
and
the logic
function to trigger it.
5.
Push the upper Trigger-MODE button to activate the trigger. The readout
will show which of the A/B trigger combinations is selected. If the trigger is
defined by the
WR,
the
WR
Configuration Menu
is
displayed next, before
the trigger activates. See 'Word Recognizer Operation."
6.
Set the A-Trigger and B-Trigger controls or the
WR
pattern for the desired
trigger. Set SOURCE, COUPLING, SLOPE, and LEVEL for the B Trigger
with the
MENU
indicator
on.
Press
NB/MENU
to light the AUTO or NORM
indicator, then set the A Trigger.
2465A/2455A/2445A Operators