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Chapter 4 Remote Interface Reference
An Introduction to the SCPI Language
106
SCPI Parameter Types
The SCPI language defines several different data formats to be used in
program messages and response messages.
Numeric Parameters Commands that require numeric parameters will
accept all commonly used decimal representations of numbers including
optional signs, decimal points, and scientific notation. Special values for
numeric parameters like
MINimum,MAXimum,
and
DEFault
are also
accepted. You can also send engineering unit suffixes (V, A or SEC) with
numeric parameters. If only specific numeric values are accepted, the power
supply will automatically round the input numeric parameters. The following
command uses a numeric parameter:
CURR {
<current>
|MINimum|MAXimum}
Discrete Parameters Discrete parameters are used to program settings
that have a limited number of values (like
BUS
,
IMM
). Query responses will
always return the short form in all upper-case letters. The following
command uses discrete parameters:
TRIG:SOUR {BUS|IMM}
Boolean Parameters Boolean parameters represent a single binary
condition that is either true or false. For a false condition, the power supply
will accept “OFF” or “0”. For a true condition, the power supply will accept
“ON” or “1”. When you query a boolean setting, the power supply will
always return “0” or “1”. The following command uses a boolean
parameter:
DISP {OFF|ON}
String Parameters String parameters can contain virtually any set of
ASCII characters. A string must begin and end with matching quotes; either
with a single quote or with a double quote. You can include the quote
delimiter as part of the string by typing it twice without any characters in
between. The following command uses a string parameter:
DISPlay:TEXT
<quoted string>