ITech IT6512D - 1.6 Data Type

SCPI Command Introduction
Copyright© Itech Electronics Co., Ltd. 8
NOTE
As for every SCPI message with one query sent to the instrument, the
instrument will use a <NL> or newline sign (EOI) to terminate response of
return. For example, if "DISP:TEXT?" is sent, <NL> will be placed after
the returned data string to terminate response. If an SCPI message
includes several queries separated by semicolon (such as
"DISP?;DISP:TEXT?"), <NL> will terminate response returned after
response to the last query. In all cases, the program must read <NL> in
response before another command is sent to the instrument, otherwise
errors will be caused.
1.6 Data Type
SCPI language defines several data types used for program message and
response messages.
 Numerical parameter
Commands requiring numerical parameter support the notations of all common
decimal notations, including optional signs, decimal points, scientific notation,
etc. Special values of numerical parameter are also acceptable, such as MIN,
MAX and DEF. In addition, suffixes for engineering units can also be sent
together with numerical Parameter (including M, k, m or u). If the command
accepts only some specific values, the instrument will automatically round the
input parameter to acceptable values. The following commands require
numerical Parameter of frequency value:
[SOURce[1|2]:]FREQuency:CENTer {<Frequency>|MINimum|MAXimum}
 <NR1>: represents an integer value, such as 273;
 <NR2>: represents a real number in floating-point format, such as
0.273;
 <NR3>: represents a real number in scientific notation, such as
2.73E+2;
 <Nrf>:The extensible form includes <NR1>, <NR2> and <NR3>;
 <Nrf+>: The extensible decimal form includes <NRf> and MIN MAX
DEF, MIN and MAX represent the minimum and maximum finite
number. DEF is the default of the parameter.
 Discrete parameter
Discrete Parameter are used for settings with limited number of programming
values (such as IMMediate, EXTernal or BUS). They can use short and long
format like key words of commands. They may be expressed in both upper and
lower case. The query response always returns uppercase Parameter in short
format. The following commands require discrete Parameter in voltage unit:
[SOURce[1|2]:]VOLTage:UNIT {VPP|VRMS|DBM}
 Boolean parameter
Boolean Parameter refer to true or false binary conditions. In case of false
conditions, the instrument will accept "OFF" or "0". In case of true conditions,
the instrument will accept "ON" or "1". In query of Boolean settings, the
instrument will always return "0" or "1". Boolean Parameter are required by the
following commands:
DISPlay {OFF|0|ON|1}
 ASCII string Parameter
String Parameter may actually include all ASCII character sets. Character