Model 2400 Compatibility; General Compatibility - Keithley 2601B Reference Manual

Series 2600B System SourceMeter® Instrument Reference Manual

Model 2400 compatibility

This section provides information on programming the Series 2600B in Model 2400 emulation mode.
The information provided includes details of general compatibility and tables that contain listings of
the not supported, partially supported, and fully supported commands.

General compatibility

Observe the following details when operating the Series 2600B in Model 2400 emulation mode.
Busy signal
As in a non-emulated Model 2400, the BUSY signal is active from the point that a start-of-test (SOT)
signal is received until all measurements, limit testing, and digital I/O operations have completed. To
use a BUSY signal in a non-emulated Model 2400, the binning control must be set to END. If the
trigger count is set to a value less than the number of points in the source memory sweep, the BUSY
signal indefinitely stays in the busy state. When the Series 2600B is in Model 2400 emulation mode,
the BUSY signal works in either binning control modes (END or IMM) as long as one or more of the
Calculate2 limit tests are enabled and will not be in the busy state indefinitely.
Source autodelay
While in Model 2400 emulation mode, when the source auto delay feature is enabled, the Series
2600B source delay is used and is set to automatic delay (smua.source.delay =
smua.DELAY_AUTO).
Timestamps
When the automatic timestamp reset feature is enabled, the timestamp is automatically reset when
the first measurement is taken. This differs from the operation of an actual Model 2400 where the
timestamp will be automatically reset when exiting the idle layer of the trigger model. This difference
can be observed when the Arm or Trigger layer event detectors are enabled.
Status word
While in Model 2400 emulation mode, the following bits of the status word are always set to zero (0):
•
Bit 2 (Front/Rear)
•
Bit 4 (OVP)
•
Bit 10 (Auto-ohms)
•
Bit 16 (Range Compliance)
•
Bit 17 (Offset Compensation)
•
Bit 18 (Contact check failure)
•
Bit 23 (Pulse Mode)
2600BS-901-01 Rev. B / May 2013
Appendix G: Model 2400 emulation
G-3