5520A
Operators Manual
5-36
5-41. Response Message Syntax
In the command descriptions in Chapter 6, responses from the Calibrator are described
wherever appropriate. In order to know what type of data to read in, refer to the first part
of the entry under "Response" in the tables. The response is identified as one of the data
types in Table 5-10.
Table 5-10. Response Data Types
Data Type Description
Integer Integers for some controllers or computers are decimal numbers in the range -32768 to
32768.
Responses in this range are labeled Integer.
Example: *ESE 123; *ESE?
returns: 123
Floating Numbers that may have up to 15 significant figures plus an exponent that may range
from ±E20.
Example: DC_OFFSET?
returns: 1.4293E+00
String Any ASCII characters including quotation mark delimiters.
Example: SRQSTR “SRQ from 5520A”; SRQSTR?
returns: “SRQ from 5520A”
Character
Response
Data (CRD)
This type of response is always a keyword.
Example: OUT 10V, 100HZ; FUNC?
returns: ACV
Indefinite
ASCII (IAD)
Any ASCII characters followed by EOM. Queries with this type of response MUST be
the last Query in a program message.
Example: *OPT?
returns: SC600
CAL reports and lists which contains Line Feeds are typically of this type.
Binary
Block Data
A special data type defined by the IEEE-488.2 standard. This type is used in *PUD?
query. It is defined as follows:
#(non-zero digit) (digits) (user data)
The non-zero digit specifies the number of characters that will follow in the <digits>
field. Characters allowed in the digits field are 0 through 9 (ASCII 48 through 57
decimal). The value of the number in the <digits> field in decimal defines the number of
user data bytes that follow in the <user data> field. The maximum response is 64
characters.
Example: *PUD “test1”; *PUD?
returns: #205test1
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