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Command Descriptions
TDS Family Oscilloscope Programmer Manual
2–95
ment, it will convert it to BASE or INVERT depending on the selected wave-
form. The TDS 400A will not output this argument in response to a query.
LINE specifies a video line as the unit of measure. This is most useful if you
have option 05 video trigger installed. On some models, if you do not have
option 05, use of this argument will generate an error message. On the TDS
400A, if you do not have option 05, the TDS 400A will use the NTSC standard
for converting from time to lines. In order for the measurement to be accurate in
the TDS 400A when TRIGGER:MAIN:VIDEO:SYSTEM is set to custom, you
must set TRIGGER:MAIN:VIDEO:SCANPERIOD.
BASe (TDS 400A only) specifies the base (or natural) units of the waveform as
the unit of measurement. If internal clock is enabled, the base units are seconds.
If external clock is enabled, the base units are clocks.
INVert (TDS 400A only) specifies 1/ base (or natural) units of the waveform as
the unit of measurement. If internal clock is enabled, the base units are 1/seconds
(hertz). If external clock is enabled, the base units are 1/clocks.
CURSOR:VBARS:UNITS SECONDS
sets the units for the vertical bar cursors to seconds.
CURSOR:VBARS:UNITS?
returns HERTZ when the vertical bar cursor units are hertz.
CURSor:VBArs:UNITSTring? (Query Only)
TDS 400A Only
Queries the unit string as shown on screen for the vertical bar cursor readout.
Cursor
CURSor:VBArs:UNITSTring?
CURSor
:
VBArs :
?UNITSTring
CURSOR:VBARS:UNITSTRING?
might return "ms", indicating the units are milliseconds.
Examples
Group
Syntax
Examples