HP 54501A Operation Reference page 64

holdoff Key
Pattern Trigger
Exercise
Instrument Setup
Trigger Menu
6-10
•
when present > : a trigger is generated when a trigger pattern is true
longer than a specified minimum time period. This time period is
specified in the next selection key that
selected. The present > time ranges from
•
:
when present <
less than a specified maximum time period. This time period is
specifi e d in the next selection key that is activated when present < IS
selected. The present < time ranges from
•
this trigger condition
range:
present > .
trigger
A
longer than a specified minimum and shorter than a specified
maximum time period. These time periods are specified in the next
two selection keys that are activated when
range time setting must be less than the second range time setting.
Pressing the holdoff key assigns the entry devices to control holdoff.
Holdoff disables the trigger circuit for
trigger event. Holdoff is selected in time units, from 40 ns to
incremented in
20 ns intervals.
exercise demonstrates how to define the four bit pattern and how it
This
affects the trigger, displays the signals, and reads the pattern.
Set the trigger level for each trigger source while in
These trigger levels must be set before you go 10 the pattern mode,
or proper triggering may nol occur.
To perform the following exercise use the
Generator, or another function generator capable of producing the same
volt, squarewave signal.
1 MHz, 1
activated when present > is
is
a trigger is generated when a trigger pattern
is a combination of present
generated when a trigger pattern is true for
is
a
selectable time period after the
Note
HP 8116A
ns ms.
to
20
160
is
ns
ms.
to
20
160
< and
range is selected. The first
InS and is
320
the
edge mode.
PulseIFunction
true