Programming with SCPI 2-6 Subsystem Commands
S412E PM PN: 10580-00319 Rev. N 2-9
Data Parameter Notations
The following syntax conventions are used for data parameter descriptions in this manual:
Unit Suffixes
Unit suffixes are not required for data parameters, provided the values are scaled for the
global default units. The S412E SCPI default units are: Hz (Hertz) for frequency-related
parameters, s (seconds) for time-related parameters, and m (meters) for distance-related
parameters.
If the command accepts a terminator, then the following are the available unit choices:
• <freq> accepts GHZ (Giga Hertz), MHZ or MAHZ (Mega Hertz), KHZ (Kilo Hertz),
HZ (Hertz)
• <time> accepts PS (picosecond), NS (nanosecond), US (microsecond),
MS (millisecond), S (Second)
• <distance> in meters accepts MM (millimeter), M (meter)
• <distance> in feet accepts FT (feet)
Table 2-4. Parameter Notations
<arg> ::=a generic command argument consisting of one or more of the other data types
<bNR1> ::=boolean values in <NR1> format; numeric 1 or 0
<boolean> ::=ON | OFF. Can also be represented as 1 or 0, where 1 means ON and 0 means
OFF
Boolean parameters are always returned as 1 or 0 in <NR1> format by query
commands
<integer> ::=an unsigned integer without a decimal point (implied radix point)
<NR1> ::=a signed integer without a decimal point (implied radix point)
<NR2> ::=a signed number with an explicit radix point
<NR3> ::=a scaled explicit decimal point numeric value with an exponent
(for example, floating point number)
<NRf> ::=<NR1>|<NR2>|<NR3>
<nv> ::=SCPI numeric value:
<NRf>|MINimum|MAXimum|UP|DOWN|DEFault|NAN (Not A Number),
|INFinity|NINFinity (Negative Infinity), or other types
<char> ::=<CHARACTER PROGRAM DATA> Examples: CW, FIXed, UP, and DOWN
<string> ::=<STRING PROGRAM DATA> ASCII characters surrounded by double quotes
For example: “OFF”
<block> ::=IEEE-488.2 block data format
<NA> ::=Not Applicable
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