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14-2 FORMat and Misc SYSTem Commands Model 2701 User’s Manual

FORMat commands

The commands in this subsystem (Table 14-1) are used to select the elements for acquired

readings and to select the data format for reading status event registers.

NOTE Details on the FORMat:SREGister command are provided in Section 11 (see

“Programming and reading registers”).

FORMat:ELEMents <item list>

Parameters READing = DMM reading

UNITs = Units

TSTamp = Timestamp

RNUMber = Reading number

CHANnel = Channel number

LIMits = Limits reading

The speciﬁed elements are included in the data string in response to FETCh?, READ?,

MEASure?, and TRACe:DATA?. Note that each element in the item list must be separated

by a comma (i.e. send “FORMat:ELEMents READing, UNITs, TSTamp, RNUMber,

CHANnel, LIMits” to include all elements in the data string). The elements for the ASCii

format are shown in Figure 14-1.

An overﬂow reading is returned as +9.9E37. When a speciﬁed data element has invalid

data associated with it, NAN (Not A Number) will be the response. NAN is returned as

+9.9E37.

Timestamp — Timestamp references the returned data string to a point in time. There are

two timestamps: relative and real-time clock. The following command selects the

timestamp:

SYSTem:TSTamp:TYPE <name> ’ Select timestamp type; RELative or RTCL.

The relative timestamp operates as a timer that starts at zero seconds when the instrument

is turned on or when the relative timestamp is reset (SYSTem:TSTamp:RELative:RESet).

After 99,999.99 seconds, the timer resets back to zero and starts over.

Table 14-1

SCPI commands — data format

Command Description Default

FORMat:ELEMents <item list> Specify data elements; READing, UNITs, TSTamp,

RNUMber, CHANnel, LIMits.

All

FORMat:SREGister <name> Select data format for reading status event registers;

ASCii, HEXadecimal, OCTal, or BINary.

ASCii

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