HP E4418B Programming Manual page 124

Power Meter Remote Operation
An Introduction to the SCPI Language
<string> Definition
Throughout this chapter <string> is used to represent 7-bit ASCII
characters.
The format is defined as:
Program Data
'
"
Response Data
"
"
1-100
'
' <inserted >
<non-single
quote char>
"
" <inserted >
<non-double
quote char>
"
<inserted >
<non-double
quote char>
HP E4418B/E4419B Programming Guide
'
"
"