Keysight Technologies B2900A Series User manual

Keysight Technologies

Making Time Domain Measurement with

Staircase Source Using SMU

B2900A Precision Source/Measure Unit

Demo Guide

Introduction

The Keysight B2900A Series Precision Source/Measure Unit (SMU) is a compact and

cost-effective bench-top SMU with the capability to output and measure both voltage

and current. The B2900A Series SMU enables you to make a wide range of current

versus voltage (IV) measurements more accurately and quickly than ever before. In

addition, the B2900A Series SMU comes with an intuitive graphical user interface (GUI)

and free PC-based application software that make it easy for you to begin making

productive measurements immediately.

This demonstration guide shows how easily you can make a time domain measurement

with sourcing staircase current or voltage using the B2900A Series SMU

Concept

Figure 1 illustrates the connection diagram used in the demo to make a time domain

measurement of voltage with sourcing staircase sweep current to an LED using the

B2900A Series SMU

Figure 1. Connection diagram

Required Instrument and Accessories

All of the accessories required to perform the demos described in this demonstration guide

are provided in a demo kit that is included with Keysight B2902A/12A demo units. The kit

includes items such as a Kelvin Probe Set, an LED.

Keysight B2902A/12A

Precision Source/Measure Unit 11059A Kelvin Probe Set

LED

A-

High Force

Low Force

B2901/02/11/12A

DUT

Common

DUT : LED

Source Mode : Voltage

Start Value : 0 V

Stop Value : 2 V

Points : 101

Current Limit : 100 mA

03 | Keysight | Making Time Domain Measurement with Pulsed Source Using SMU – Demo Guide

Figure 2. Timing chart for the time domain measurement with staircase sweep source

Figure 2 shows the timing chart for the time domain measurement with staircase source with

the front panel operation. In this case, the specified source value is sourced immediately after

turning on . Then, when you press , the instrument will make a time domain

measurement with staircase source. Because the B2900A series SMU has an independent

trigger system for each of the source and measurement function, the multiple measurements

can be made during each step of staircase source. If it is necessary, you can specify any

measurement trigger delay time which is the wait time before making a measurement. The

measurement time consists of Measurement Speed and some overhead time. Measurement

Speed is the parameter specified by the user. Overhead time includes the time to change the

measurement range, etc.

Setup

1. Connect the yellow banana plug to the Ch 1 Low Force Terminal.

2. Connect the red banana plug to the Ch1 High Force Terminal.

3. Clip the LED cathode terminal with the black gold-plated tweezers.

4. Clip the LED anode terminal with the red gold-plated tweezers.

Cathode

Anode

Red (11059A)

Yellow (11059A) Black (11059A)

Red (11059A)

Output ON

Source Value

Output

Off State

:Measurement

Source V or I

Time

Start Value

Press Trigger Internal Source Trigger

Stop Value

TSP TSP TSP

Time

TMP

Internal Measurement Trigger

TMD

TMP

TMD

TMP

TMD

TMP

TMD

TMP

TMD

TMP

TMD

TMP

TMD

TMP

TMD

Measure

V or I

TMD

: Measurement Trigger Delay Time

: Measurement Time

TMP

TSP

: Measurement Trigger Period

: Source Trigger Period

04 | Keysight | Making Time Domain Measurement with Pulsed Source Using SMU – Demo Guide

LAB: Make Time Domain Measurement with Staircase Source Using SMU

Objective

This demo illustrates the function to

make a time domain measurement of

voltage with sourcing staircase voltage

to an LED using a Source/Measure Unit.

Procedure

1. Change View mode to Channel 1

Single View

2. Configure the condition for Time

Domain Measurement

3. Change View mode to Graph View

4. Perform the measurement

5. View the measurement result graph

6. View the list of measurement results

7. (Optional) Configure the measure-

ment speed

8. (Optional) Configure to use AUTO

measurement range operation

Demonstration

1. Change View mode to Channel 1 Single View

1) Press repeatedly until the Channel 1

Single View is displayed.

2. Configure the condition for Time Domain Measurement

Press to edit the Source function, and then select to set the Source

function to Voltage source.

2) Press to edit the Source value, and then enter 0 V to set the Source value to 0 V.

3) Press to edit the Limit value, and then enter 100 mA to set the Limit value to 100 mA.

4) Press to configure the Measurement parameter, and then select to set the

Measurement parameter to Current

05 | Keysight | Making Time Domain Measurement with Pulsed Source Using SMU – Demo Guide

Press to change the keys shown in Assist keys, and then press to show

Sweep Sub-Panel.

6) Press , then press to turn on Single Linear Sweep Mode. After turning

on Single Linear Sweep Mode, you can see Source Shape which shows the single

linear sweep mode.

7) Rotate to select Channel 1 Sweep Parameters and set them up as below.

(Start: 0 V, Stop: 2 V, Points: 101, Step: 20 mV)

8) Press to show Trigger Sub-Panel.

9) Press to edit the Trigger type, and then select to set the Trigger type

to TIMER.

06 | Keysight | Making Time Domain Measurement with Pulsed Source Using SMU – Demo Guide

10) Rotate to select Channel 1 Trigger Parameters and set them up as below.

Source Trigger Count should be the same number as Sweep Points. Measurement

Trigger Count defines the number of sampling and Measurement Trigger Period defines

the interval of sampling.

(Source Trigger Count: 101, Measurement Trigger Count: 1010, Source Trigger Period:

10 ms, Measurement Trigger Delay Time: 500 us, Measurement Trigger Period: 1 ms)

Now you’ve configured a 1 ms measurement trigger period for a sampling measure-

ment. The measurement will be performed every 1 ms periodically. However, please

note that a FIXED current measurement range operation will be used to control the

trigger period strictly. The measurement range is selected by Limit value. In this

example, a 100 mA measurement range will be used.

3. Change View mode to Graph View

Press repeatedly until Graph View

is displayed.

Rotate and press to edit the X-axis data type.

Press , and then select to set the X-axis data type to Time.

07 | Keysight | Making Time Domain Measurement with Pulsed Source Using SMU – Demo Guide

4. Perform the measurement

1) Press to source the voltage specified by the Source value, and then press

to perform a measurement.

(The status information will show during the measurement.)

5. View the measurement result graph

1) Press to adjust the scale of the graph after finishing the measurement.

Now you can see the measurement result on the GUI of the B2900A series SMU as

below.

2) Rotate and press to edit the Y-axis data type, and then select to set

the Y-axis data type to Voltage.

Now you can see the measured voltage, which is sourced to the device, on the GUI of

the B2900A series SMU as below.

08 | Keysight | Making Time Domain Measurement with Pulsed Source Using SMU – Demo Guide

6. View the list of measurement results

The measurement results including the measurement time stamp can be referred by the

following steps.

1) If you aren’t on the top of the Function menu, press repeatedly to return to

the top level.

2) If you’d like to see the list of the measurement result, press , then press

to open Measure Result dialogue.

3) Rotate and press to select the Data Type field.

4) Press to change the keys shown in Assist keys, and then press to

select Time as the Data type.

5) Rotate and press to select the Data field. Then rotate to scroll the data

list.

On the top level of the Function menu

In the middle level of the Function menu

Any tree structure can’t be seen

Some tree structure can be seen

(1) Press Result

(2) Press Measure

09 | Keysight | Making Time Domain Measurement with Pulsed Source Using SMU – Demo Guide

7. (Optional) Configure the measurement speed

In the default setting, the instrument selects the appropriate measurement speed

and range automatically to get the fine accuracy. However, you can also specify these

parameters on the GUI of the B2900A series SMU to meet a variety of the requirement to

the measurement conditions.

For example, let’s try to change the measurement speed to SHORT to make a measure-

ment more quickly. If you select SHORT, the aperture time is set to 0.01 PLC. Here, PLC

stands for power line cycle and the specified number of power line cycles is used per a

measurement.

1) Press repeatedly until the Channel 1

Single View is displayed.

2) Press to edit the Measurement speed, and then select to set the

Measurement speed to SHORT. (If you can’t see in Assist keys, press

to change the keys shown in Assist keys.)

10 | Keysight | Making Time Domain Measurement with Pulsed Source Using SMU – Demo Guide

If you prefer to control the B2900A Series SMU remotely using SCPI remote commands,

then the following material explains how to do this.

The series of commands shown in group “A” configure the sweep condition. Next the

series of commands shown in group “B” configure the trigger condition. Finally, the series

of commands shown in group “C” should be sent to initiate the channel to output signal.

*RST

:SOUR:FUNC:MODE VOLT

:SOUR:VOLT 0

:SENS:FUNC 'CURR'

:SENS:CURR:PROT 0.1

:SOUR:FUNC:SHAP DC

:SOUR:VOLT:MODE SWE

:SOUR:SWE:SPAC LIN

:SOUR:VOLT:STAR 0

:SOUR:VOLT:STOP 2

:SOUR:VOLT:POIN 101

:TRIG:SOUR TIM

:TRIG:TRAN:COUN 101

:TRIG:TRAN:TIM 1E-2

:TRIG:TRAN:DELAY 0

:TRIG:ACQ:COUN 1010

:TRIG:ACQ:DELAY 5E-4

:TRIG:ACQ:TIM 1E-3

:OUTP ON

:INIT (@1)

B2900A Series SMU SCPI command example

Optionally, a command shown in “D” configure the measurement integration condition.

Controlling the B2900A Series SMU using SCPI commands

7. (Optional) Configure the measurement speed

B2900A Series SMU SCPI command example

:SENS:VOLT:NPLC 0.01 D

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