MDO3000 Programmer Manual.pdf - 第312页
Commands Listed in A lphabetical 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 …
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.)
2-282 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Group
Status and Erro
r
Syntax
DESE <N R1>
DESE?
Related Commands
*CLS, *ESE, *ES
R?, EVENT?, EVMsg?, *SRE, *STB?
Arguments
<NR1> sets the binary bits of the DESER according to this value, which ranges
from 1 through 255. For example, DESE
209 sets the DESER to the binary value
11010001 (that is, the most significant bit in the register is set to 1, the next most
significant bit to 1, the next bit to 0, etc.).
The power-on default for DESER is all bits set if *PSC is 1. If *PSC is 0, the
DESER maintains the previous power cycle value through the current power cycle.
NOTE. Setting the DESER and ESER to the same value allows only those codes
to be entered into the Event Queue and summarized on the ESB bit (bit 5) of the
Status Byte Register. Use the *ESE commandtosettheESER.
Examples
DESE 209 sets the DESER to binary 11010001, which enables the PON, URQ,
EXE and OPC bits.
DESE? might return:DESE 186, showing that the DESER contains the binary
value 10111010.
DESkew (No Query Form)
Causes the deskew values for all channels to be set to the recommended values.
Equivalent to pressing the "Set all deskews to recommended values" button in
the application UI.
NOTE. The actual deskew values for each channel can be set or queried using the
CH<x>:DESKew command.
Group
Vertical
Syntax
DESkew {SETALLtorec}
Arguments
<SETALLtorec> sets the deskew for all channels to the recommended values.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-283