HP 54501A Operation Reference page 73

Channel l is displayed
bit pattern, ehannel 4 must be high (higher than the channel
level) or greater than 125 m V. When the signal on ehannel l goes higher
than 125 m V and channel 4 is still low (less than -100 m V) the pattern
conditions have been satisfied, the
positive pulse on ehannel l.
•
Press the islis not present key and ehange the condition
present.
The pattern becomes false when channel 4 turns high.
•
Change the bit pattern to
condition.
hp r u n n i n g
-
Figure 6-12. Chann e l 1 Clock XXH State
To satisfy this bit condition the clock channel must go low while channel 4
is high. The oscill o scope
channel 4 is
high.
the top screen. To satisfy the conditions of the
in
5450lA triggers on the next
HP
t
and select the is not present
XXH
1
0 . 00000
\'l s / d i
v
s
10.0
will not trigger
until
trigge r
4
not
10
STATE TRIGGER
t r i g ' d .
® �
X X
5<l5011'Wf70
channel 1 goes low while
Trigger Menu
6-19