MDO3000 Programmer Manual.pdf - 第265页

Commands Listed in Alphabetical Order CH<x>:YUNits This command speciﬁes the vertical units for the channel speciﬁed by <x>, where x is the channel number . String arguments are case insensitive and an y unsu…

Commands Listed in Alphabetical Order

Group

Vertical

Syntax

CH<x>:SCAle <NR3>

CH<x>:SCAle?

Related Commands

CH<x>:OFFSet, CH<x>:POSition, REF<x>:VERTical:SCAle,

MATH[1]:VERTical:SCAle

Arguments

<NR3> is a ﬂoating point number that speciﬁes the vertical channel scale in

units-per-division. The value entered here is truncated to three signiﬁcant digits.

Examples

CH4:SCALE 100E-03 sets the channel 4 scale to 100 mV per division.

CH2:SCALE? might return :CH2:S CALE 1.0000 indicating that the current scale

setting of channel 2 is 1 V per division.

CH<x>:TERmination

Sets the connected-disconnected status of a 50 Ω resistor (or 75 Ω with

MDO3000 models) which may be connected between the speciﬁed channel's

coupled input and oscilloscope ground. The channel is speciﬁed by <x>. There is

also a corresponding query that requests the termination parameter and translates

this enumeration into one of the two ﬂoat values.

NOTE. 75 Ω termination is not available on the MDO3104 or MDO3102 models.

Group

Vertical

Syntax

CH<x>:TERmination {FIFty|MEG|<NR3>}

CH<x>:TERmination?

Arguments

FIFty sets the channel <x> input resistance to 50 Ω.

MEG sets the channel <x> input resistance to 1 MΩ.

<NR3> is a ﬂoating point number that speciﬁes the channel <x> input resistance

numerically.

Examples

CH4:TERMINATION 50.0E+0 establishes 50 Ω impedance on channel 1.

CH2:TERMINATION? might return :CH2:TERMIN ATION 50.0E+0 indicating

that channel 2 is set to 50 Ω impedance.

2-234 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual

Commands Listed in Alphabetical Order

CH<x>:YUNits

This command speciﬁes the vertical units for the channel speciﬁed by <x>,

where x is the channel number. String arguments are case insensitive and any

unsupported

units will generate an error.

Supported units are:

%, /Hz, A, A/

A, A/V, A/W, A/dB, A/s, AA, AW, AdB, As, B, Hz, IRE, S/s, V,

V/A, V/V, V/W, V/dB, V/s, VV, VW, VdB, volts, Vs, W, W/A, W/V, W/W, W/dB,

W/s,WA,WV,WW,WdB,Ws,dB,dB/A,dB/V,dB/W,dB/dB,dBA,dBV,dBW,

dBdB, day, degrees, div, hr, min, ohms, percent, s

The vertical units affect the “Probe Type” that is shown in the “Probe Setup”menu:

Setting CH<x>:YUNits to “V” causes the probe type to be displayed as

“Voltage”.

When CH1:AMSVIAVOLTs:ENAble is set to OFF, setting CH<x>:YUNits to

“A” causes the probe type to be displayed as “Current”.

Setting CH<x>:YUNits to anything else causes the probe type not to be

displayed (neither “Voltage” nor “Current” are highlighted).

Group

Vertical

Syntax

CH<x>:YUNits <QString>

CH<x>:YUNits?

Arguments

QString is a string of text surrounded by quotes, specifying the supported units.

Examples

CH4:YUN “V” causes the probe type to be displayed as “Voltage”.

CLEARMenu (No Query Form)

Clears the current menu from the display. This command is equivalent to pressing

the front panel Menu off.

Group

Miscellaneous

Syntax

CLEARMenu

MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-235

Commands Listed in Alphabetical Order

*CLS (No Query

Form)

Clears the following:

Event Queue

Standard Event Status Register

Status Byte Register (except the MAV bit)

If the *CLS

command immediately follows an <EOI>, the Output Queue and

MAV bit (Status Byte Register bit 4) are also cleared. The MAV bit indicates that

information is in the output queue. The device clear (DCL) control message

will clear the output queue and thus MAV. *CLS does not clear the output queue

o r M AV.

*CLS can suppress a Service Request that is to be generated by an *OPC. This

will happen if a single sequence acquisition operation is still being processed

when the *CLS command is executed.

Group

Status and Error

Syntax

*CLS

Related Commands

DESE, *ESE, *ESR?, EVENT?, EVMsg?, *SRE, *STB?

Examples

*CLS clears the oscilloscope status data structures.

CONFIGuration:ADVMATH? (Query Only)

This query returns a boolean value to indicate whether the advanced math feature

is present.

Group

Conﬁguration

Syntax

CONFIGurat

ion:ADVMATH?

Related Commands

MATH[1]:TYPe ADVanced

Returns

<NR1> = 1 if the advanced math feature is present.

<NR1> = 0 if the advanced math feature is not present.

2-236 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual