Tektronix TDS3000 Series, Program Manual, Page: 47 / 418

Command Syntax
TDS3000, TDS3000B, and TDS3000C Series Programmer Manual
2- 9
Some commands accept or return data in the form of a quoted string, which is
simply a group of ASCII characters enclosed by a single quote (
’ ) or double
quote ( ” ). For example:
”this is a quoted string”
Symbol Meaning
<QString> Quoted string of ASCII text
Follow these rules when you use quoted strings:
1. A quoted string can include any character defined in the 7-bit ASCII
character set. (See
Appendix A: Character Charts on page A--3).
2. Use the same type of quote character to open and close the string:
”this is a valid string”
3. You can mix quotation marks within a string as long as you follow the
previous rule:
”this is an ’acceptable’ string”
4. You can include a quote character within a string simply by repeating the
quote. For example,
”here is a ”” mark”
5. Strings can have upper or lower case characters.
6. If you use a GPIB network, you cannot terminate a quoted string with the
END message before the closing delimiter.
7.
A carriage return or line feed imbedded in a quoted string does not terminate
the string, but is treated as just another character in the string.
8. The maximum length of a quoted string returned from a query is 1000
characters.
Here are some invalid strings:
H
”Invalid string argument’
(quotes are not of the same type)
H
”test<EOI>”
(termination character is embedded in the string)
Quoted String Arguments