MDO3000 Programmer Manual.pdf - 第574页

Commands Listed in A lphabetical Order REF<x>:VERTi cal:POSition This command speciﬁes the vertical position of the reference waveform speciﬁed by <x>. Increasing the position value of a wavef orm causes the …

Commands Listed in Alphabetical Order

Group

Vertical

Syntax

REF<x>:HORizontal:SCAle <NR3>

REF<x>:HORizontal:SCAle?

Arguments

<NR3> is a ﬂoating point number that speciﬁes the horizontal scale in seconds.

Examples

REF1:? might return REF1: 4.0E-4.

REF<x>:LABel

This command speciﬁes the label for the reference waveform speciﬁed by <x>.

Group

Vertical

Syntax

REF<x>:LABel <Qstring>

REF<x>:LABel?

Arguments

<Qstring> is an alphanumeric string of text, enclosed in quotes, that contains

the label text for the reference channel <x> waveform. The text string is limited

to 30 characters.

Examples

REF4:LABEL? might return :REF4:LABEL “Clk Wfm 2”.

REF<x>:TIMe? (Query Only)

Returns the time that reference waveform data was copied into the internal

reference memory for reference waveform <x>.

Group

Vertical

Syntax

REF<x>:TIMe?

Examples

REF4:TIME? might return “16:54:05 ”.

MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-543

Commands Listed in Alphabetical Order

REF<x>:VERTi

cal:POSition

This command speciﬁes the vertical position of the reference waveform speciﬁed

by <x>.

Increasing the position value of a waveform causes the waveform to move up,

and decreasing the position value causes the waveform to move down. Position

adjusts onl

y the display position of a waveform. The position value determines the

vertical graticule coordinate at which signal values are displayed. For example, if

the position for Reference 3 is set to 2.0, the signal represented by that reference

will be displayed at 2.0 divisions above the center of the screen.

Group

Vertical

Syntax

REF<x>:VERTical:POSition <NR3>

REF<x>:VERTical:POSition?

Related Commands

CH<x>:POSition,

MATH[1]:VERTical:POSition

Arguments

<NR3> is a ﬂoating point number that speciﬁes the desired position, in divisions

from the center horiz

ontal graticule. The range is from -5.0 to 5.0 divisions.

Examples

REF2:VERTICAL:POSITION 1.3E+00 positions the Reference 2 input signal

1.3 divisions above the center horizontal graticule.

REF1:VERTICAL:POSITION? might return :REF1:VERTICAL:POSITION

-1.3000E+00

indicating that the current position of Reference 1 is 1.3 divisions

below the center horizontal graticule.

REF<x>:VERTical:SCAle

This command speciﬁes the vertical scale for the reference waveform speciﬁed by

<x>. This setting controls the display only. For a signal with constant amplitude,

increasing the scale causes the waveform to be displayed smaller. Decreasing the

scale causes the waveform to be displayed larger.

Group

Vertical

Syntax

REF<x>:VERTical:SCAle <NR3>

REF<x>:VERTical:SCAle?

2-544 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual

Commands Listed in Alphabetical Order

Related Commands

CH<x>:SCAle,

MATH[1]:VERTical:SCAle

Arguments

<NR3> is a ﬂoating point number that speciﬁes the gain in user units-per-division.

Examples

REF4:VERTICAL:SCALE 100E-03 sets the Reference 4 scale to 100 mV per

division.

REF4:VERTICAL:SCALE? might return :REF2:VERTICAL:SCALE

1.0000e+00

indicating that the current vertical scale setting for Reference 2 is

1 V per division.

REM (No Query Form)

Embeds a comment within programs as a means of internally documenting the

programs. The oscilloscope ignores these embedded comment lines.

Group

Miscellaneous

Syntax

REM <QS tring>

Arguments

<QString> is a string that can contain a maximum of 80 characters.

Examples

REM "This is a comment" is a comment string that the oscilloscope will

ignore.

RF:CLIPPing? (Query Only)

Returns a boolean indicating whether the RF input is “clipping” due to input

over/under-range detection.

Conditions

MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.

Group

Syntax

RF:CLIPPing?

Returns

1 or ON indicates that the RF input is clipping.

MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-545