29-32
Advanced Pattern Trigger Mode and Commands
Logic triggering is similar to the way that a logic analyzer captures data.
This mode is useful when you are looking for a particular set of ones and
zeros on a computer bus or control lines. You determine which channels
the oscilloscope uses to form the trigger pattern. Because you can set
the voltage level that determines a logic 1 or a logic 0, any logic family
that you are probing can be captured.
There are two types of logic triggering: Pattern and State. The difference
between pattern and state triggering modes is that state triggering uses
one of the oscilloscope channels as a clock.
Use pattern triggering to trigger the oscilloscope using more than one
channel as the trigger source. You can also use pattern triggering to
trigger on a pulse of a given width.
The Pattern Trigger Mode identifies a trigger condition by looking for a
specified pattern. A pattern is a logical combination of the channels.
Each channel can have a value of High (H), Low (L) or Don’t Care (X).
A value is considered a High when your waveform's voltage level is
greater than its trigger level, and a Low when the voltage level is less
than its trigger level. If a channel is set to Don’t Care, it is not used as
part of the pattern criteria.
One additional qualifying condition determines when the oscilloscope
triggers once the pattern is found. The :PATTern:CONDition command
has five possible ways to qualify the trigger:
Entered
The oscilloscope will trigger on the edge of the source that makes the
pattern true.
Exited
The oscilloscope will trigger on the edge of the source that makes the
pattern false.
Present >
The oscilloscope will trigger when the pattern is present for greater than
the time that you specify. An additional parameter allows the
oscilloscope to trigger when the pattern goes away or when the time
expires.
Present <
The oscilloscope will trigger when the pattern is present for less than
the time that you specify.
Summary of Contents for Infiniium 8000A
Page 1: ...Agilent Technologies Infiniium 8000A Programmer s Reference ...
Page 2: ......
Page 20: ...Contents 16 ...
Page 21: ...1 Introduction to Programming ...
Page 43: ...2 LAN and GPIB Interfaces ...
Page 53: ...3 Message Communication and System Functions ...
Page 58: ...3 6 ...
Page 59: ...4 Status Reporting ...
Page 78: ...4 20 Figure 4 3 Status Reporting Decision Chart ...
Page 79: ...5 Programming Conventions ...
Page 84: ...5 6 Programming Conventions The Command Tree Figure 5 1 Command Tree ...
Page 85: ...5 7 Programming Conventions The Command Tree Figure 5 2 Command Tree Continued ...
Page 86: ...5 8 Programming Conventions The Command Tree Figure 5 3 Command Tree Continued ...
Page 87: ...5 9 Programming Conventions The Command Tree Figure 5 4 Command Tree Continued ...
Page 88: ...5 10 Programming Conventions The Command Tree Figure 5 5 Command Tree Continued ...
Page 89: ...5 11 Programming Conventions The Command Tree Figure 5 6 Command Tree Continued ...
Page 94: ...5 16 ...
Page 95: ...6 Sample Programs ...
Page 149: ...7 Acquire Commands ...
Page 176: ...7 28 Acquire Commands SRATe AUTO ...
Page 177: ...8 Bus Commands ...
Page 187: ...9 Calibration Commands ...
Page 195: ...10 Channel Commands ...
Page 223: ...11 Common Commands ...
Page 247: ...12 Digital Commands ...
Page 254: ...12 8 ...
Page 255: ...13 Disk Commands ...
Page 300: ...13 46 Disk Commands STORe Obsolete ...
Page 301: ...14 Display Commands ...
Page 322: ...14 22 ...
Page 323: ...15 External Trigger Commands ...
Page 343: ...16 Function Commands ...
Page 382: ...16 40 ...
Page 383: ...17 Hardcopy Commands ...
Page 391: ...18 Histogram Commands ...
Page 403: ...19 InfiniiScan ISCan Commands ...
Page 421: ...20 Limit Test Commands ...
Page 429: ...21 Marker Commands ...
Page 452: ...21 24 ...
Page 453: ...22 Mask Test Commands ...
Page 499: ...23 Measure Commands ...
Page 636: ...23 138 Measure Commands VUPPer ...
Page 637: ...24 Pod Commands ...
Page 642: ...24 6 ...
Page 643: ...25 Root Level Commands ...
Page 645: ...25 3 STORe SETup STORe WAVeform TER Trigger Event Register VIEW ...
Page 674: ...25 32 ...
Page 675: ...26 Self Test Commands ...
Page 679: ...27 System Commands ...
Page 694: ...27 16 ...
Page 695: ...28 Time Base Commands ...
Page 708: ...28 14 ...
Page 709: ...29 Trigger Commands ...
Page 822: ...29 114 ...
Page 823: ...30 Waveform Commands ...
Page 893: ...31 Waveform Memory Commands ...
Page 902: ...31 10 ...
Page 903: ...32 Error Messages ...
Page 914: ...32 12 ...