Keithley 6487 Reference Manual

13-4 DISPlay, FORMat, and SYSTem Model 6487 Reference Manual
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
klqb <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 6487.
Table 13-2
SCPI commands — data format
Command Description Default Ref
:FORMat
:DATA <type>[,<length>] Specify data format: ASCii, REAL, 32 or SREal. ASCii A
:DATA? Query data format.
:ELEMents <item list> Specify data elements: READing, UNITS,
VSOurce, TIME, STATus, DEFault, and ALL.
All except
VSO
B
:BORDer <name> Specify byte order: NORMal or SWAPped. (see Note) C
:BORDer? Query byte order.
:SREGister <name> Select data format for reading status registers:
ASCii, HEXadecimal, OCTal, or BINary.
ASC
Section 10
:SREGister? Query data format for reading status registers.
:SOURce2 <name> Select data format for reading output patterns:
ASCii, HEXadecimal, OCTal, or BINary.
ASC Section 8
:SOURce2? Query data format for output patterns.
Note: *RST default is NORMal. SYSTem:PRESet default is SWAPped.

Keithley 6487 Specifications

General

Type	Picoammeter/Voltage Source
Current Measurement Range	20 fA to 20 mA
Interfaces	GPIB, RS-232
Voltage Burden	< 200 µV
Input Impedance	>10^14 Ω
Power	100 V / 120 V / 220 V / 240 V
Basic Current Measurement Accuracy	0.4%