Tektronix Keithley SourceMeter 2470 User Manual

Section
6: Measure I-V characteristics of FETs Model 2470 High Voltage SourceMeter Instrument
User's Manual
6-12 2470-900-01 Rev. B / August 2019
SMU 1,
SMU 2, or
pseudocode
Commands Description
SMU 1
*RST
:SENS:FUNC "CURR"
:SENS:CURR:RANG:AUTO ON
:ROUT:TERM REAR
:SOUR:FUNC VOLT
:SOUR:VOLT:RANG 20
 Reset the instrument.
 Set to measure current.
 Set to measure with autorange
enabled.
 Set to use rear terminals.
 Set to source voltage.
 Set to 20 V source range.
SMU 2
*RST
:SENS:FUNC "CURR"
:SENS:CURR:RANG:AUTO ON
:ROUT:TERM REAR
:SOUR:FUNC VOLT
:SOUR:VOLT:RANG 20
:SOUR:VOLT:ILIM 1
:SOUR:SWE:VOLT:LIN 0, 5, 51, 0.01
 Reset the instrument.
 Set to measure current.
 Set to measure with autorange
enabled.
 Set to use the rear terminals.
 Set to source voltage.
 Set to the 20 V source range.
 Set the source limit to 1 A.
 Set up a linear sweep from 0 V to 5 V
in 51 steps, with a delay of 10 ms.
SMU 1
:OUTP ON
 Turn on the output.
Pseudocode
vds = []
ids = []
for i = 2, 5 do:
 Create an empty array to hold
measured voltage values.
 Create an empty array to hold
measured current values.
 Set up a for loop from 2 to 5
(inclusive).
SMU 1
:SOUR:VOLT i
 Set the source level to the iteration
number of the loop.
Pseudocode
delay(0.5)
 Delay for 500 ms to allow for settling.
SMU 2
:INIT
*WAI
 Trigger the sweep to start.
 Wait for the operations to complete.
Pseudocode
Read output queue
 Wait for sweep to complete.
Pseudocode
for SMU 2
vds[i-1]=TRAC:DATA? 1, 51,
"defbuffer1", SOUR
ids[i-1]=TRAC:DATA? 1, 51,
"defbuffer1", READ
 Receive each of 51 readings and
source values from the buffer and
save them in the arrays vds and ids,
respectively. The arrays start at index
one. Each point in the arrays contains
a list of values for each gate voltage.
Pseudocode
end for
 End the for loop.
SMU 1
:OUTP OFF
 Turn the output off. NOTE: All of the
source and measure values can be
returned from the arrays vds and
ids
.

Tektronix Keithley SourceMeter 2470 Specifications

General

Model	2470
Type	SourceMeter
Category	Measuring Instruments
Channels	1
Voltage Source Range	±1000 V
Current Source Range	±1 A
Power	100 W
Current Measurement Resolution	10 pA
Measurement Resolution	6½ digits
Display	5 inch capacitive touchscreen
Interface	USB, GPIB, Ethernet
Supported Communication Protocols	SCPI
Input/Output Connectors	4-wire

Summary

Safety Precautions

Electrical Hazard Warnings and Precautions

Details precautions for hazardous voltage levels, connections, and live circuits.

Instrument Handling and Grounding Safety

Covers power cord, cable inspection, grounding, and general safe handling practices.

Front-Panel Operation and Controls

Powering the Instrument On and Off

Instructions for basic power management of the Model 2470 instrument.

Front Panel Controls Overview

Description of front-panel keys, touchscreen, and navigation controls.

Touchscreen Navigation and Swipe Screens

Basic Front-Panel Measurements

Device Connection for Measurements

Performing Front-Panel Measurements

Step-by-step guide for taking measurements directly using the instrument's front panel.

Leakage and Insulation Resistance Testing

Leakage Current Measurement Procedures

Step-by-step guide for measuring leakage current, including front-panel and remote methods.

Insulation Resistance Measurement Procedures

Step-by-step guide for measuring insulation resistance, including front-panel and remote methods.

Measuring FET I-V Characteristics

Introduction to FET I-V Characterization

Equipment and Hardware Setup

External Trigger Synchronization

Setting up external triggers for synchronizing multiple instruments.

FET Testing via SCPI Commands

Performing FET I-V tests using SCPI command sequences.

FET Testing via TSP Commands

Troubleshooting and FAQs

Command Set and Interlock Troubleshooting