D-2
DDC Emulation Commands
Model 6485 Picoammeter Instruction Manual
DDC language
The Model 6485 can be configured to accept device-dependent commands (DDC) of the
Keithley Model 485 picoammeter. The commands for controlling the Model 6485 with the
DDC language are provided in
. For details on Model 485 operation, refer to the
appropriate instruction manual.
Since the architecture of the Model 6485 differs from that of the other picoammeters,
some commands are different and cannot be used. Be sure to refer to the notes at the end
of the table for information on command restrictions. Commands marked NDS are not
directly supported in the SPCI command set. For convenience, some new DDC commands
have been added to the 485 command set to allow use of the expanded capabilities of the
6485. These commands are marked NEW.
CAUTION
The DDC language is intended to be used only over the IEEE-488 bus.
Using front panel controls in conjunction with this language may cause
erratic operation. In this case, results cannot be guaranteed.
Table D-1
Device dependent command summary
Mode
Command
Description
Equivalent SCPI commands
Note
Default
Reading
Mode
B0
Picoammeter Readings
READ?, FETCh?, MEAS?, or
[SENSe[1]]:DATA[:LATest]?
NDS,
NEW
X
B1
Buffer reading (returns one at a time)
TRACe:DATA?
(returns entire buffer)
NDS,
NEW
B2
Maximum reading from buffer
CALCulate3:FORMat MAXimum
CALCulate3:DATA?
NDS,
NEW
B3
Minimum reading from buffer
CALCulate3:FORMat MINimum
CALCulate3:DATA?
NDS,
NEW
Zero Check
C0
Zero Check off
SYSTem:ZCHeck OFF
X
C1
Zero Check on
SYSTem:ZCHeck ON
LOG
D0
LOG off
CALCulate[1]:STATe OFF
X
D1
LOG on
CALCulate[1]:FORMat LOG10
CALCulate[1]:STATe ON
Summary of Contents for 6485
Page 20: ......
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Page 44: ...1 20 Getting Started Model 6485 Picoammeter Instruction Manual ...
Page 66: ...3 6 Measurements Model 6485 Picoammeter Instruction Manual ...
Page 138: ...9 20 Remote Operation Model 6485 Picoammeter Instruction Manual ...
Page 159: ...11 CommonCommands ...
Page 164: ...11 6 Common Commands Model 6485 Picoammeter Instruction Manual ...
Page 165: ...12 SCPISignalOriented MeasurementCommands ...
Page 190: ...14 12 SCPI Reference Tables Model 6485 Picoammeter Instruction Manual ...
Page 214: ...16 14 Calibration Model 6485 Instruction Manual ...
Page 219: ...A Specifications ...
Page 221: ...B StatusandErrorMessages ...
Page 227: ...C GeneralMeasurement Considerations ...
Page 233: ...D DDCEmulationCommands ...
Page 247: ...E ExamplePrograms ...
Page 250: ...E 4 Example Programs Model 6485 Picoammeter Instruction Manual ...
Page 251: ...F IEEE 488BusOverview ...
Page 266: ...F 16 IEEE 488 Bus Overview Model 6485 Picoammeter Instruction Manual ...
Page 267: ...G IEEE 488andSCPI ConformanceInformation ...
Page 311: ......