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16-4
DISPlay, FORMat, and SYSTem
FORMat subsystem
The commands in this subsystem are used to select the format for transferring data over the
bus.
A) FORMat[:DATA] <type>[,<length>]
Parameters
ASCii
=
ASCII format
REAL, 32
=
Binary IEEE-754 single precision format
SREal
=
Binary IEEE-754 single precision format
NOTE
<length> is not used for the ASCii or SREal parameters. It is optional for the REAL
parameter. If you do not use <length> with REAL, <length> defaults to 32 (single
precision format). The double precision format (<length> = 64) is not supported by
Model 6514.
The response to READ?, FETCh?, MEASure?, TRACe:DATA?, CALC1:DATA? or
CALC2:DATA? over the GPIB can be returned in either the ASCii or binary format. All other
queries are returned in ASCii, regardless of the selected format. Over the RS-232 interface, only
the ASCII format is allowed.
NOTE
Regardless of which data format for output strings is selected, the instrument will only
respond to input commands using the ASCII format.
ASCII data format
The ASCII data format is in a direct readable form for the operator. Most BASIC languages
easily convert ASCII mantissa and exponent to other formats. However, some speed is compro-
mised to accommodate the conversion. Figure 16-1 shows an example ASCII string that includes
all the data elements. See :ELEMents for information on the data elements.
Table 16-2
SCPI commands — data format
Command
Description
Default
Ref
:FORMat
[:DATA] <type>[,<length>] Specify data format; ASCii, REAL, 32 or SREal.
ASCii
A
:ELEMents <item list>
Specify data elements; READing, TIME, and
STATus.
All 3
B
:BORDer <name>
Specify byte order; NORMal or SWAPped.
(see Note)
C
:SREGister <name>
Select data format for reading status registers;
ASCii, HEXadecimal, OCTal, or BINary.
ASC
Sec 13
:SOURce2 <name>
Select data format for reading output patterns:
ASCii, HEXadecimal, OCTal, or BINary.
ASC
Sec 10
Note: *RST default is NORMal. SYSTem:PRESet default is SWAPped.
Summary of Contents for 6514
Page 203: ...14 CommonCommands...
Page 207: ...15 SCPISignalOriented MeasurementCommands...
Page 235: ...18 PerformanceVerification...
Page 254: ...19 Calibration...
Page 274: ...20 RoutineMaintenance...
Page 278: ...A Specifications...
Page 282: ...B StatusandErrorMessages...
Page 288: ...C GeneralMeasurement Considerations...
Page 294: ...D DDCEmulationCommands...
Page 299: ...E ExamplePrograms...
Page 306: ...F IEEE 488BusOverview...
Page 320: ...G IEEE 488andSCPI ConformanceInformation...
Page 324: ...H CalibrationOptions...