Agilent Technologies B2902 Servisní příručka stáhnout pdf (Strana 28)

1- 12 Agilent B2900 SCPI Command Reference, Edition 2

Programming Basics

Data Output Format

B2900 supports the following data output formats for sending the result data. The

data contains all of the elements specified by the

:FORMat:ELEMents:SENSe or

:FORMat:ELEMents:CALCulate command. Available elements are voltage

measurement data, current measurement data, resistance measurement data,

calculation result data, time data, status data, and source output setting data. A

terminator <newline> (0x0a, 1 byte) is attached to the end of each data.

• ASCII data format, set by :FORMat[:DATA] ASCii

Returns the result data in the comma-separated format. If the data contains three

elements, B2900 sends the data as shown in the following example.

Example: +1.000001E-06,+1.000002E-06,+9.999999E-07<newline>

+9.910000E+37 indicates “not a number”.

+9.900000E+37 indicates positive infinity.

-9.900000E+37 indicates negative infinity.

• IEEE-754 single precision format, set by :FORMat[:DATA] REAL,32

4-byte definite length block data, #<number of digits for byte length><byte

length><byte>...<byte><terminator>. For example, two data elements are sent

by a data block which consists of a header (3

bytes, #18), two 4-byte data, and a

terminator (1 byte). A 4-byte data is used for each data element. Each element

consists of a fraction (bits 0 (LSB) to 22), exponent (bits 23 to 30), and sign (bit

31).

Order of bytes set by :FORMat:BORDer NORMal (default): byte 1 to 4

Order of bytes set by :FORMat:BORDer SWAPped: byte 4 to 1

NaN indicates “not a number”.

+infinity indicates positive infinity.

-infinity indicates negative infinity.

• IEEE-754 double precision format, set by :FORMat[:DATA] REAL,64

8-byte definite length block data, #<number of digits for byte length><byte

length><byte>...<byte><terminator>. For example, one data element is sent by a

data block which consists of a header (3

bytes, #18), one 8-byte data, and a

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 325 326

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Agilent Technologies B2902 Servisní příručka Strana 28