Technical data

Table 26

Parameter Description

<block data> The data that describes the pattern (see

the following for the description).

The <block data> parameter contains the actual data for setting the bits of the

user pattern. The bits can also be packed using the FORMat[:DATA] command. If

the bits are not packed, they are handled as 8-bit data. See “[SOURce

[1]]:PATTern:FORMat[:DATA][?] ” on page 103.

This command also sets the pattern length to fit the length of the data: If the data

block is longer than the pattern, the pattern is extended to fit the data; if the data

block is shorter than the pattern, the pattern is truncated to the end of the data.

<block data> starts with a header that indicates the length of the desired resulting

data. The length of the <block data> embedded in the header always refers to the

length of the data block in bytes.

For example, consider the following header:

• #19<data>

# Start of the header.

1 Number of decimal digits to follow

to form the length.

9 Length of the data block (in bytes)

that follows.

<data> The pattern data, packed according

the DATA:PACKed command.

For non-packed data (or 8-bit packed data), the <block data> required to set an 8-

bit pattern of alternating 1s and 0s (01010101) would be:

• #11U (Note that "U" is the ASCII representation of 85)

For 4-bit packed data, the <block data> required to set the same pattern would be:

• #1255

For 1-bit packed data, the <block data> would be as follows:

• #1801010101

SCPI Command Reference 5

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