Keithley 2461 Reference Manual

Model 2461
Interactive SourceMeter® Instrument Reference Manual Section 6:
SCPI command reference
2461-901-01 A/November 2015 6-189
:TRIGger:BLOCk:BRANch:DELTa
This command defines a trigger model block that goes to a specified block if the difference of two measurements
meets preset criteria.
Type Affected by Where saved Default value
Command only
Recall settings
Instrument reset
Power cycle
Save settings
Not applicable
Usage
:TRIGger:BLOCk:BRANch:DELTa <blockNumber>, <targetDifference>, <branchToBlock>
:TRIGger:BLOCk:BRANch:DELTa <blockNumber>, <targetDifference>, <branchToBlock>,
<measureBlock>
<blockNumber>
The sequence of the block in the trigger model
<targetDifference>
The value against which the block compares the difference between the
measurements
<branchToBlock>
The block number of the trigger model block to execute when the difference
between the measurements is less than or equal to the
<targetDifference>
<measureBlock>
The block number of the measure or digitize block that makes the
measurements to be compared; if this is 0 or undefined, the trigger model uses
the previous measure or digitize block
Details
This block calculates the difference between the last two measurements from a measure or digitize
block. It subtracts the most recent measurement from the previous measurement.
The difference between the measurements is compared to the target difference. If the difference is
less than the target difference, the trigger model goes to the specified branching block. If the
difference is more than the target difference, the trigger model proceeds to the next block in the
trigger block sequence.
If you do not define the measure or digitize block, it will compare measurements of a measure or
digitize block that precedes the branch delta block. For example, if you have a measure block, a wait
block, another measure block, another wait block, and then the branch delta block, the delta block
compares the measurements from the second measure block. If a preceding measure or digitize
block does not exist, an error occurs.
Example
TRIG:BLOC:BRAN:DELT 5, 0.5, 7, 4
Configure trigger block 5 to compare the
differences between the measurements made in
block 4. If the difference between them is less
the 0.5, branch to block 7.
Also see
Delta block (on page 3-120)

Keithley 2461 Specifications

General

Maximum Current	7 A
Power	100 W
Resolution	6.5 digits
Source Measure Unit (SMU)	Yes
DC Voltage	100 V
Maximum Voltage	100 V
Display	5-inch capacitive touchscreen
Connectivity	USB, GPIB
Software	TSP
DC Current	7 A
Current Source Range	0 to 7 A
Voltage Measurement Range	100 mV to 100 V
Current Measurement Range	10 nA to 7 A
Voltage Measurement Resolution	100 nV