Keithley 2651A Reference Manual

Section 7: Command reference Model 2651A High Power System SourceMeter® Instrument Reference Manual
7-280 2651A-901-01 Rev. A / March 2011
Bit Value Description
B0
status.operation.instrument.smuX.CALIBRATING
status.operation.instrument.smuX.CAL
Set bit indicates that
smuX is unlocked for
calibration.
Bit B0 decimal value: 1
B1-B2 Not used Not applicable.
B3
status.operation.instrument.smuX.SWEEPING
status.operation.instrument.smuX.SWE
Set bit indicates that
smuX is sweeping.
Bit B3 decimal value: 8
B4
status.operation.instrument.smuX.MEASURING
status.operation.instrument.smuX.MEAS
Bit will be set when taking
an overlapped
measurement, but it will
not set when taking a
normal synchronous
measurement.
Bit B4 decimal value: 16
B5-B9 Not used Not applicable.
B10
status.operation.instrument.smuX.TRIGGER_OVERRUN
status.operation.instrument.smuX.TRGOVR
Set bit indicates an
enabled bit has been set
in the operation status
smu X trigger overrun
event register.
Bit B10 decimal value:
1024
B11-B15 Not used Not applicable.
As an example, to set bit B0 of the operation status SMU A summary enable register, set
status.operation.instrument.smua.enable = status.operation.instrument.smua.CAL.
In addition to the above constants, operationRegister can be set to the numeric equivalent of the bit to set.
To set more than one bit of the register, set operationRegister to the sum of their decimal weights. For
example, to set bits B0 and B10, set operationRegister to 1025 (which is the sum of 1 + 1024).
Bit B7 B6 B5 B4 B3 B2 B1 B0
Binary value 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
Decimal 128 64 32 16 8 4 2 1
Weights (2
7
) (2
6
) (2
5
) (2
4
) (2
3
) (2
2
) (2
1
) (2
0
)
Bit B15 B14 B13 B12 B11 B10 B9 B8
Binary value 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
Decimal 32,768 16,384 8,192 4,096 2,048 1024 512 256
Weights (2
15
) (2
14
) (2
13
) (2
12
) (2
11
) (2
10
) (2
9
) (2
8
)
Example
status.operation.instrument.smua.enable =
status.operation.instrument.smua.MEAS
Sets the MEAS bit of the operation
status SMU A summary enable
register using a constant.
Also see
Operation Status Registers (on page E-20)
status.operation.instrument.smuX.trigger_overrrun.* (on page 7-281)

Keithley 2651A Specifications

General

Brand	Keithley
Model	2651A
Category	Measuring Instruments
Language	English