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User Manual 3155Programming Reference 4-16Numeric Parameters Commands that require numeric parameters accept all commonlyused decimal representations of numbers including optional signs,decimal points, and scientific notation. Special values for numeric pa-rameters like MINimum and MAXimum are also accepted.Engineering unit suffices with numeric parameters (e.g., MHz or kHz)can also be sent. If only specific numeric values are accepted, thefunction generator ignores values which are not allowed and gener-ates an error message. The following command is an example of acommand that uses a numeric parameter:VOLT:AMPL Discrete Parameters Discrete parameters are used to program settings that have a limitednumber of values (i.e., FIXed, USER and SEQuence). They haveshort and long form command keywords. Upper and lowercase let-ters can be mixed. Query responses always return the short form inall uppercase letters. The following command uses discrete pa-rameters:SOUR:FUNC:MODE {FIXed | USER | SEQuence}Boolean Parameters Boolean parameters represent a single binary condition that is eithertrue or false. The generator accepts "OFF" or "0" for a false condi-tion. The generator accepts "ON" or "1" for a true condition. The in-strument always returns "0" or "1" when a boolean setting is queried.The following command uses a boolean parameter:OUTP:FILT { OFF | ON }The same command can also be written as follows:OUTP:FILT {0 | 1 }SCPI Syntax andStylesWhere possible the syntax and styles used in this section followthose defined by the SCPI consortium. The commands on the fol-lowing pages are broken into three columns; the KEYWORD, thePARAMETER FORM, and any NOTES.The KEYWORD column provides the name of the command. Theactual command consists of one or more keywords since SCPIcommands are based on a hierarchical structure, also known as thetree system. Square brackets ( [ ] ) are used to enclose a keywordthat is optional when programming the command; that is, the 3155processes the command to have the same effect whether the op-tional node is omitted by the programmer or not. Letter case in tables
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