Tektronix CSA7404B, User Manual

Page: 137 / 438

Triggering
CSA7000B Series & TDS7000B Series Instruments User Manual
3- 69
Overview Triggering from the front panel Control elements and resources
Prerequisites 1. The instrument must be installed and operating.
Acquisition system should be set to Run, and the
vertical and horizontal controls should be set appropri-
ately for the signal to be acquired.
See page 3--23 for acquisition setup
To select the
trigger type
2. Push the EDGE button to select edge type triggering.
Push ADVANCED to bring up the Trigger control window
where you can select and set up other trigger types.
To select the
trigger slope 3. Push the TRIGGER SLOPE button to toggle between
POS and NEG:
H
POS triggers on a rising edge (positive going)
signal
H
NEG triggers on a falling edge (negative going)
signal
You can also set the slope in the Trigger setup window.
H
Either triggers on both the rising edge and falling
edge of the signal (select Either in the setup
window)
To set level 4. To manually change the trigger level when edge
triggering (or certain threshold levels when logic or pulse
triggering), turn the trigger LEVEL knob.
You can also set the level in the Trigger setup window.
Using the Trigger Setup window you can make trigger
level settings shared or independent of the Source
selection:
H
Shared makes level settings the same for all trigger
sources
H
Independent makes level settings apply only to the
selected trigger source