TDS5000B Online Programmer Guide
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Trigger Command Group
Use the commands in the Trigger Command Group to control all as-
pects of triggering for the instrument.
There are two triggers: A and B. Where appropriate, the command set
has parallel constructions for each trigger.
You can set the A or B triggers to edge mode. Edge triggering lets you
display a waveform at or near the point where the signal passes through
a voltage level of your choosing.
You can also set A triggers to pulse, logic or video modes. With pulse
triggering, the instrument triggers whenever it detects a pulse of a cer-
tain width or height. Logic triggering lets you logically combine the
signals on one or more channels. The instrument then triggers when it
detects a certain combination of signal levels. Video triggering enables
you to trigger on the most common Standard Definition, High Defini-
tion, and custom video standards. You can trigger on all fields, all lines,
or individual video lines.
If you have Option SM (Mask Testing) installed, you also have access
to a communication mode. When this mode is selected, several commu-
nication trigger commands are available that work in conjunction with
the mask commands. Refer to Mask Command Group and
Command Description
TRIGger Forces a trigger event to oc-
cur or returns current trigger
parameters for the instru-
ment
TRIGger:A Sets A trigger level to 50% or
returns current A trigger pa-
rameters
TRIGger:A:COMMunication:AMI. . .
PULSEForm
Sets the AMI pulse form
TRIGger:A:COMMunication:AMI. . .
THReshold:HIGH
Sets the AMI threshold high
level
TRIGger:A:COMMunication:AMI. . .
THReshold:LOW
Sets the AMI threshold low
level
TRIGger:A:COMMunication:BITRate Sets and returns the bit rate
TRIGger:A:COMMunication:CLOCk:
POLarity
Sets or returns the polarity of
the clock signal
TRIGger:A:COMMunication:CMI:
PULSEForm
Selects the CMI pulse form
TRIGger:A:COMMunication:CODe Sets the signal code
TRIGger:A:COMMunication:SOUrce Sets the source channel
TRIGger:A:COMMunication:SOUrce:
TYPe
Sets the type of source
channel
TRIGger:A:COMMunication:STANdard Selects the standard that
identifies the code and bit
rate
TRIGger:A:EDGE:COUPling Sets or returns the type of
coupling for the A edge trig-
ger