Keithley 2600a series User Manual

2600AS-901-01 Rev. B / September 2008 Return to Section Topics 6-9
Series 2600A System SourceMeter® Instruments Reference Manual Section 6: Range, Digits, Speed, Rel, and Filters
Remote rel programming
Rel commands
Rel commands are summarized in Table 6-5.
Rel programming example
-- Set current rel to 100mA.
smua.measure.rel.leveli = 0.1
-- Enable current rel.
smua.measure.rel.enablei = smua.REL_ON
Filters
Filter lets you set the filter response to stabilize noisy measurements. The Series 2600A uses a
digital filter, which is based on reading conversions. The displayed, stored, or transmitted reading
is calculated using many reading conversions (from 1 to 100).
Filter types
There are three filter types from which to choose. These three filters are broken down into two
averaging filters and one median filter.
The two averaging filters are repeating and moving (see Figure 6-1). For the repeat filter (which is
the power-on default), the stack (filter count) is filled, and the conversions are averaged to yield a
reading. The stack is then cleared, and the process starts over.
The moving average filter uses a first-in, first-out stack. When the stack (filter count) becomes full,
the measurement conversions are averaged, yielding a reading. For each subsequent conversion
placed into the stack, the oldest conversion is discarded. The stack is re-averaged, yielding a new
reading.
Table 6-5
Rel commands
Command
*
Description
To set rel values:
smuX.measure.rel.leveli = relval
smuX.measure.rel.levelp = relval
smuX.measure.rel.levelr = relval
smuX.measure.rel.levelv = relval
To enable/disable rel:
smuX.measure.rel.enablei = smuX.REL_OFF
smuX.measure.rel.enablep = smuX.REL_OFF
smuX.measure.rel.enabler = smuX.REL_OFF
smuX.measure.rel.enablev = smuX.REL_OFF
smuX.measure.rel.enablei = smuX.REL_ON
smuX.measure.rel.enablep = smuX.REL_ON
smuX.measure.rel.enabler = smuX.REL_ON
smuX.measure.rel.enablev = smuX.REL_ON
Set current rel value.
Set power rel value.
Set resistance rel value.
Set voltage rel value.
Disable current rel.
Disable power rel.
Disable resistance rel.
Disable voltage rel.
Enable current rel.
Enable power rel.
Enable resistance rel.
Enable voltage rel.
* smuX = smua for the Model 2601A/2611A/2635A; smuX = smua (Channel A) or smub (Channel B)
for the Model 2602A/2612A/2636A.

Keithley 2600a series Specifications

General

Brand	Keithley
Model	2600a series
Category	Measuring Instruments
Language	English