Tektronix 222PS, Operator'S Manual

Page: 61 / 232

222PS Operator Manual
3Ć15
Capturing Random
Events
Capturing random electric events in circuits is difficult and timeĆconĆ
suming. You can use the 222PS's single sequence mode to make the
task easier.
SingleĆsequence mode is one of four trigger modes you can use with
the 222PS. In singleĆsequence mode, the instrument acquires one
triggered signal. It then displays the signal and holds it until you press
the button labeled INIT to start the sequence all over again. Changing
a control that affects the signal acquisition also starts the sequence
again.
The following procedure will help you use singleĆsequence mode to
capture a random event.
ĂĂStep 1:ă Preset the instrument controls to display a baseline
signal.
ĂĂStep 2:ă Apply a test signal to the channel 1 input to set the trigger
level. Make sure the test signal is the same amplitude and general
type (negative or positive pulse or sinusoidal) as the signal you
want to trigger on.
ĂĂStep 3:ă Press AUTO SETUP to obtain a quick frontĆpanel control
setup for the test signal. If the resulting vertical or horizontal
scaling result is not precisely what you want, adjust the voltsĆperĆ
division and secondsĆperĆdivision controls as you wish. If necesĆ
sary, reposition the trace vertically.
ĂĂStep 4:ă Set the trigger mode to normal.
ĂĂStep 5:ă Set the trigger source to channel 1.
ĂĂStep 6:ă Achieve a stable display by adjusting the trigger level
control.
ĂĂStep 7:ă To set the trigger mode to singleĆsequence, Press the
button labeled MODE on the front panel. Press the menu button
next to the menu item SSEQ .
222PS Operator Manual
3Ć15
Capturing Random
Events
Capturing random electric events in circuits is difficult and timeĆconĆ
suming. You can use the 222PS's single sequence mode to make the
task easier.
SingleĆsequence mode is one of four trigger modes you can use with
the 222PS. In singleĆsequence mode, the instrument acquires one
triggered signal. It then displays the signal and holds it until you press
the button labeled INIT to start the sequence all over again. Changing
a control that affects the signal acquisition also starts the sequence
again.
The following procedure will help you use singleĆsequence mode to
capture a random event.
ĂĂStep 1:ă Preset the instrument controls to display a baseline
signal.
ĂĂStep 2:ă Apply a test signal to the channel 1 input to set the trigger
level. Make sure the test signal is the same amplitude and general
type (negative or positive pulse or sinusoidal) as the signal you
want to trigger on.
ĂĂStep 3:ă Press AUTO SETUP to obtain a quick frontĆpanel control
setup for the test signal. If the resulting vertical or horizontal
scaling result is not precisely what you want, adjust the voltsĆperĆ
division and secondsĆperĆdivision controls as you wish. If necesĆ
sary, reposition the trace vertically.
ĂĂStep 4:ă Set the trigger mode to normal.
ĂĂStep 5:ă Set the trigger source to channel 1.
ĂĂStep 6:ă Achieve a stable display by adjusting the trigger level
control.
ĂĂStep 7:ă To set the trigger mode to singleĆsequence, Press the
button labeled MODE on the front panel. Press the menu button
next to the menu item SSEQ .