MDO3000 Programmer Manual.pdf - 第311页

Commands Listed in Alphabetical Order NOTE. This comm and is equivalent to th e WFMOutpre:B YT_ Nr command. (See page 2-95, W aveform T ransfer Command Gr oup.) Group W aveform T ransfer Syntax DATa:WIDth <NR1> DAT…

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Commands Listed in Alphabetical Order
(See page 2-95, Wa
veform Transfer Command Group.)
Group
Waveform Transfer
Syntax
DATa:STOP <NR1>
DATa:STOP?
Related Commands
CURVe,
DATa,
DATa:STARt,
WFMInpre:NR_Pt,
WFMOutpre:NR_Pt?
Arguments
<NR1> is the last data point that will be transferred, which ranges from 1 to
the record length. If
<NR1> is greater than the record length, then data will be
transferred up to the record length. If both
DATa:STARt and DAT a:STOP are
greater than the record length, the lastdatapointintherecordisreturned.
DATa:STARt and DATa:STOP are order independent. When DATa:STOP is less
than
DATa:STARt, the values will be swapped internally for the CURVe? query.
If you always want to transfer complete waveforms, set
DATa:STARt to1and
DATa:STOP to the record length of the source waveform, or larger.
Examples
DATA:STOP? might return DATA:STOP 14900 indicating that 14900 is the last
waveform data point that will be transferred.
DATA:STOP 15000 specifies that the waveform transfer will stop at data point
15000.
DATa:WIDth
This command specifies the width, in bytes per point, for waveform data
transferred from the scope via the
CURVe? query. (This command is synonymous
with
WFMOutpre:BYT_Nr .) When the source is CH1-CH4, REF1-REF4,
MATH, D 0-D15, RF_AMPlitude, RF_ FREQuency and RF_PHASe,
the
default width is 1 byte. When the source is
RF_NORMal, RF_AVERage,
RF_MAXHold, RF_MINHold
or DIGital, the default width is 4 bytes.
NOTE. The RF time domain traces, RF_AMPlitude, RF_FREQuency and
RF_PHASe, are only available on the MDO4000/B/C series models.
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Commands Listed in Alphabetical Order
NOTE. This comm
and is equivalent to the
WFMOutpre:B YT_Nr
command.
(See page 2-95, Waveform Transfer Command Group.)
Group
Waveform Transfer
Syntax
DATa:WIDth <NR1>
DATa:WIDth?
Related Commands
CURVe?,
DATa:SOUrce,
DATa:DESTination,
WFMOutpre:BYT_Nr
Arguments
<NR1> is an integer that indicates the number of bytes per point for the outgoing
wave
form data when queried using the
CURVe? command. For analog channel
and RF_FREQuency, RF_PHASe and RF_AMPlitude traces (MDO4000/B/C
only), the values can be 1 or 2. For digital channels (D0 through D15), the values
can be 1 or 2. For the digital collection (
DATa:SOUrce DIGital), the values
can be 4 or 8. For RF_NORMal, RF_AVERage, RF_MAXHold, or RF_MINHold,
the value can only be 4 as this is 32-bit floating point data.
Examples
DATa:WIDth 2 sets the width of waveform data to be read from the scope to
2bytes.
DATa:WIDth? might return 1, indicating that a width of 1 byte has been set.
DATE
This command specifies the date the oscilloscope displays.
Group
Miscellaneous
Syntax
DATE <Q String>
DATE?
Related Commands
TIMe
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-281
Commands Listed in Alphabetical Order
Arguments
<QString> is a d
ate in the form "yyyy-mm-dd" where yyyy refers to a four-digit
year number, mm refers to a two-digit month number from 01 to 12, and dd refers
to a two-digit day number in the month.
Examples
DATE "2006-01-24" specifies that the date is set to January 24, 2006.
DATE? might return :DATE 2006-01-24 indicating the current date is set to
January 24, 2014.
*DDT
Allows you to specify a command or a list of commands that execute when the
oscilloscope receives a *TRG command or the GET IEEE488.2 interface message.
Define Device Trigger (*DDT) is a special alias that the *TRG command uses.
Group
Miscellaneous
Syntax
*DDT {< Block>|<QString>}
*DDT?
Related Commands
*TRG
Arguments
<Block> is a complete sequence of program messages. The messages can contain
only valid commands that must be separated by semicolons and must follow all
rules for concatenating commands. The sequence must be less than or equal to80
characters. The format of this argument is always returned as a query.
<QString> is a complete sequence of program messages. The messages can
contain only valid commands that must be separated by semicolons and must
follow all rules for concatenating commands. The sequence must be less thanor
equal to 80 characters.
Examples
*DDT #OACQUIRE:STATE RU N specifies that the acquisition system will be
started each time a *TRG command is sent.
DESE
This command specifies the bits in the Device Event Status Enable Register
(DESER). The DESER is the mask that determines whether events are reported to
the Standard Event Status Register (SESR), and entered into the Event Queue. For
a detailed discussion of the use of these registers, see Registers. (See page 3-1,
Registers.)
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