Keithley 6482 - Page 11

Table of Contents Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
8 6482-901-01 Rev. A / August 2012
CALCulate5:DATA? and CALCulate6:DATA?....................................... B-4
CALCulate7:DATA?.............................................................................. B-4
TRACe:DATA?...................................................................................... B-4
CALCulate8:DATA?.............................................................................. B-4
C IEEE-488 Bus Overview....................................................................... C-1
Introduction ................................................................................................ C-2
Bus description .......................................................................................... C-3
Bus lines .................................................................................................... C-4
Data lines ............................................................................................ C-4
Bus management lines........................................................................ C-5
Handshake lines.................................................................................. C-5
Bus commands .......................................................................................... C-6
Uniline commands............................................................................... C-7
Universal multiline commands............................................................. C-7
Addressed multiline commands .......................................................... C-8
Address commands............................................................................. C-8
Unaddress commands ........................................................................ C-8
Common commands ........................................................................... C-8
SCPI commands ................................................................................. C-9
Command codes ................................................................................. C-9
Typical command sequences............................................................ C-10
IEEE command groups ..................................................................... C-12
Interface function codes........................................................................... C-12
D Measurement Considerations............................................................ D-1
Low current measurements ....................................................................... D-2
Leakage currents................................................................................. D-2
Noise and source impedance.............................................................. D-2
Generated currents ............................................................................. D-3
Voltage burden .................................................................................... D-5
General measurement considerations....................................................... D-6
Ground loops....................................................................................... D-6
Light..................................................................................................... D-7
Electrostatic interference..................................................................... D-7
Magnetic fields .................................................................................... D-7
Electromagnetic interference (EMI)..................................................... D-8
E GPIB 488.1 Protocol.............................................................................. E-1
Introduction ................................................................................................. E-2
Selecting the 488.1 protocol ....................................................................... E-2
Protocol differences .................................................................................... E-2
Message exchange protocol (MEP) ..................................................... E-2
Using SCPI-based programs................................................................ E-3
Bus hold-off .......................................................................................... E-3
Trigger-on-talk ...................................................................................... E-3
Message available................................................................................ E-3
General operation notes....................................................................... E-4
F Example Programs................................................................................ F-1
Introduction ................................................................................................. F-2
Basic measurement program...................................................................... F-2
Data store program..................................................................................... F-3
Linear sweep program ................................................................................ F-4
Limit test program ....................................................................................... F-5