Tektronix MDO3000 Series Program Manual

Appendix F: Search and Trigger Command Sequence Examples
Example 2: Sin
gle Threshold Edge Trigger
Goal: Trigger on the channel 2 waveform when the waveform crosses below a
threshold of 1.4 volts.
Command Comment
*RST Resets the oscilloscope. Wait for the reset to complete (approximately
3 seconds).
:SELect:CH2 1 Turns the CH2 waveform on.
:TRIGger:A:TYPe EDG E Specifies that this will be an edge trigger (trigger will occur when the
source waveform passes through a specified threshold level in the
specified direction).
:TRIGger:A:EDGE:SOUrce CH2 Specifies the CH2 waveform as the source waveform.
:TRIGger:A:LOWerthreshold:CH2 1.4 Specifies 1.4 volts as the threshold level.
:TRIGger:A:EDGE:SLOpe FALL Specifies as falling edge as the direction.
:TRIGger:STATE? Should return TRIGGER, not A UTO.
Example 3: Dual Threshold Runt Search
Goal: Search the channel 3 waveform for negative runt pulses and place a markat
each
instance when the waveform drops below an upper threshold of 1.4 volts, but
does not cross a lower threshold of -2 volts before re-crossing the upper threshold.
The pulse width must be less than 600 microseconds.
Com
mand
Com
ment
*R
ST
Re
sets the oscilloscope. Wait for the reset to complete
(approximately 3 seconds).
:SELect:CH3 1 Turns the CH3 waveform on.
:AUTOSet EXECute Autosets the displayed waveform CH3. Wait for the autoset to
complete (approximately 3 seconds).
:SEARCH:SEARCH1:TRIGger:A:TYPe RUNT Specifies that this will be a runt search (a mark will be placed on
a pulse amplitude that crosses one threshold but fails to cross a
second threshold before re-crossing the first).
:SEARCH:SEARCH1:TRIGger:A:EDGE:SOUrce CH3 Specifies to use channel 3 as the source waveform.
:SEARCH:SEARCH1:TRIGger:A:LOWerthreshold:CH3 -2 Specifies to use -2 volts as the lower threshold.
:SEARCH:SEARCH1:TRIGger:A:UPPerthreshold: CH3 1.4 Specifies to use 1.4 volts as the upper threshold.
:SEARCH:SEARCH1:TRIGger:A:RUNT:PO Larity NEGative Specifies to search for when the runt polarity i s negative.
:SEARCH:SEARCH1:TRIGger:A:RUNT:WIDth 600E-6 Specifies a pulse width of 600E-6 seconds.
:SEARCH:SEARCH1:TRIGger:A:RUNT:WHEn LESSthan Specifies to search for when the pulse width is less than
600E-6 seconds.
:SEARCH:SEARCH1:STATE 1
Turns the search on.
F-2 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual

Tektronix MDO3000 Series Specifications

General

Brand	Tektronix
Model	MDO3000 Series
Category	Test Equipment
Language	English