Tektronix KEITHLEY 2600B Series User Manual

Series 2600B System SourceMeter® instrument Reference Manual Section 2: Sourcing and measuring
2600BS-901-01 Rev. F/August 2021 2-69
Setting the filter using a remote interface
The following table summarizes the filter commands. See the TSP command reference (on page 9-1)
for details about commands.
Filter commands
Command*
Description
smuX.measure.filter.count = count
Set filter count (1 to 100)
smuX.measure.filter.enable = smuX.FILTER_ON
Enable filter
smuX.measure.filter.enable = smuX.FILTER_OFF
Disable filter
smuX.measure.filter.type = smuX.FILTER_MEDIAN
Select median filter type
smuX.measure.filter.type = smuX.FILTER_MOVING_AVG
Select moving average filter type
smuX.measure.filter.type = smuX.FILTER_REPEAT_AVG
Select repeating average filter type
* smuX can be smua for channel A or smub for channel B
Filter programming example
The programming example below illustrates how to set the following filter options:
• Filter type: Moving average
• Filter count: 10
• Filter state: Enabled
-- Set the program count to 10.
smua.measure.filter.count = 10
-- Set the moving average filter type.
smua.measure.filter.type = smua.FILTER_MOVING_AVG
-- Enable the filter.
smua.measure.filter.enable = smua.FILTER_ON
High-capacitance mode
The Keithley Instruments 2600B has a high-capacitance mode.
Because the source-measure unit (SMU) can measure low current, issues can arise when driving a
capacitive load. The pole formed by the load capacitance and the current range resistor can cause a
phase shift in the SMU voltage control loop. This shift can lead to overshoot, ringing, and instability.
Due to the large dynamic range of current measurement and wide range of internal resistors, the
operating conditions for a given capacitive load can vary.
Based on the type, some test applications may require capacitors larger than 10 nF. While running
test scripts, it may not be possible to disconnect the capacitor from the integrated circuit and extract
accurate data. For this purpose, you can use the high-capacitance mode to minimize overshoot,
ringing, and instability.
This section provides the details that you need to estimate performance based on load capacitance
and measurement conditions.

Tektronix KEITHLEY 2600B Series Specifications

General

Brand	Tektronix
Model	KEITHLEY 2600B Series
Category	Measuring Instruments
Language	English