Agilent Technologies B2902 Service Manual download pdf (Page 29)

Agilent B2900 SCPI Command Reference, Edition 2 1- 13

Programming Basics

Data Output Format

terminator (1 byte). An 8-byte data is used for each data element. Each element

consists of a fraction (bits 0 (LSB) to 51), exponent (bits 52 to 62), and sign (bit

63).

Order of bytes set by :FORMat:BORDer NORMal (default): byte 1 to 8

Order of bytes set by :FORMat:BORDer SWAPped: byte 8 to 1

NaN indicates “not a number”.

+infinity indicates positive infinity.

-infinity indicates negative infinity.

NOTE

If the conventional command set is used

If the IEEE-754 single precision data output format is used with the conventional

command set, the output data will be an indefinite length block data, #0<byte

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

data block which consists of a header (2

bytes, #0), two 4-byte data, and a

terminator (1 byte). A block 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).

For the conventional command set, see Chapter 6, “Using Your Existing Programs.”

Status Data

B2900 sends the status data with the result data if it is specified by the

:FORMat:ELEMents:SENSe or :FORMat:ELEMents:CALCulate command.

The status data is given by a binary-weighted sum of all bits set in the binary data.

For example, if bit 3 (decimal value = 8) and bit 5 (decimal value = 32) are set to 1,

the status data returns 40.

Bit definitions of the status data are shown in Table 1-2.

1 ... 28 29 30 ... 326

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Agilent Technologies B2902 Service Manual Page 29