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7.2 Communication
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(2) Command/Parameter/Delimiter
① Command
A command can abbreviated. The whole command form is referred to as the
"long form" and the abbreviated form as the "short form."
Although the short form is printed in upper case letters and the rest in lower
case letters in this instruction manual, sending command (including
parameter and delimiter) from personal computer in either upper or lower
case letters is valid.
All responses returned from the 3237/38/39 are in upper case letters.
VOLTage OK (the long form)
VOLT OK (the short form)
VOLTA,VOL error
A command consisting of a single word beginning with a letter.
Examples: :READ? etc.
A command consisting of a sequence of words separated by colons.
Examples: :SYSTem:BEEPer, :MEASure:VOLTage? etc.
A command beginning with an asterisk (∗) to indicate that is a
particular command.
Examples: ∗RST etc.
② Parameter
Character data and decimal data are used as the 3237/38/39 parameter (data)
and the command determines the type of data. The 3237/38/39 uses
character string data and numeric data, and the type use varies according to
the command in question.
Character data
Character string data must always begin with an alphabetic character, and
the characters following can be either alphabetic characters or numerals.
Although in character data either upper case letters or lower case letters are
accepted, response message output by the 3237/38/39 are always in upper
case letters.
Decimal data
The numeric data values are all represented in decimal, in three formats
identified as NR1, NR2 and NR3, and each of these can appear as either a
signed number or an unsigned number. Unsigned numbers are taken as
positive.
NR1 format: Integer data
Example: +12, -23, 34
NR2 format: Fixed point number
Example: +1.23, -23.45, 3.456
NR3 format: Floating point number
Example: +1E-2, -2.3E+4
The term "NRf format" includes all these three formats.
Each 3237/38/39 command designates a format.
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