Keysight Technologies B2961A Manuale utente

Keysight Technologies

Sourcing Precise Current/Voltage Sinusoidal

Waveforms Using the B2961A/62A

B2961A/62A 6.5 Digit Low Noise Power Source

Demo Guide

Table of Contents

Introduction ...............................................................3

Concept .................................................................4

Setup ....................................................................5

Oscilloscope Setup .......................................................5

B2961A/62A Setup.......................................................5

LAB1: Source nite current/voltage sinusoid waveform............................6

1.1 Source nite current/voltage sinusoid waveform ............................6

1.2 (Optional) Congure phase marker output ................................10

1.3 Monitor the entire output signal on its GUI ................................12

1.4 View the list of measurement results.....................................14

LAB2: Source continuous current/voltage sinusoid waveform .....................15

2.1 Source continuous current/voltage sinusoid waveform ......................15

2.2 Stop sourcing continuous current/voltage sinusoid waveform ................16

LAB3: Sourcing current/voltage sinusoid waveform without monitoring .............17

LAB4: (Optional) Source current/voltage sinusoid waveform when the B2961A/62A

receives an external trigger signal ............................................18

Introduction

The Keysight B2961A/62A 6.5 Digit Low Noise Power Source is a bench-top power

supply with revolutionary capabilities and functions not previously available. It can

source either voltage or current with 6.5 digits of resolution while also monitoring them,

which is essential for a variety of measurement applications.

It also has an arbitrary waveform generation function that allows it to source current/

voltage waveforms in formats such as sinusoid, square, trapezoid, ramp, triangle, and

exponential. In addition to these commonly used waveforms, user-dened arbitrary

waveforms with up to 100,000 points can be specied. These exible output capabilities

permit more thorough evaluation of circuits/devices/samples than are possible with

other instruments such as power supplies and sources.

This demonstration guide highlights the excellent arbitrary waveform generation

functions of the B2961A/62A Power Source. The methodology involves sourcing a

sinusoidal current/voltage waveform through a 1.1 kΩ resistor and monitoring the

outputs through an oscilloscope.

Required Instrument and Accessories

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

guide are provided in a demo kit that is included with Keysight B2961A/62A demo units. The

kit includes items such as a banana cable, a 1.1 kΩ resistor, etc., so the only additional item

needed is an oscilloscope.

However, some of the optional demos require special cables or wiring to send phase marker

outputs or to receive trigger signals. These optional items are the N1253A-100 Digital I/O

T-cable or (alternatively) the N1294A-031 GPIO - BNC Trigger Adapter and a BNC cable. An

instrument that can send the external trigger signal to the B2961A/62A will be also required

for the optional demos.

Keysight B2961A/62A 6.5 Digit

Low Noise Power Source

Keysight Oscilloscopes

(MSO-X 4000 Series is shown)

N1253A-100 Digital I/O T-cable

1.1 kΩ Resistor

U8201A Combo Test Lead Kit

N1294A-031 GPIO - BNC Trigger Adapter

03 | Keysight | Sourcing Precise Current/Voltage Sinusoidal Waveforms Using the B2961A/62A – Demo Guide

Figure 1. Connection diagram and basic condition

Concept

Figure 1 illustrates the connection diagram and basic setup conditions used in the

demo to source current/voltage sinusoidal waveforms using the B2961A/62A. The

B2961A/62A will source a sinusoidal waveform using the settings shown below while

the output is monitored using an oscilloscope.

Figure 2 shows the parameters used to dene a sinusoid waveform from the instrument’s

front panel. Once these parameters have been specied, the specied source value is

output immediately after pressing . Next, after you press the instrument will

source a sinusoid waveform.

Although the guide shows how to source a sinusoid waveform in voltage source mode,

by selecting current source mode you can also source a current sinusoid waveform very

easily and accurately.

B2961A/62A

Figure 2. Sinusoid waveform parameters

Output ON

Source

Value

Output

Off State

V or I

Time

Offset

Press Trigger

: Amplitude

: Frequency

1/f 1/f 1/f

04 | Keysight | Sourcing Precise Current/Voltage Sinusoidal Waveforms Using the B2961A/62A – Demo Guide

Setup

Oscilloscope Setup

1. Set Ch1 vertical scale to 500 mV/div and horizontal scale to 5 ms/div.

2. Set Ch1 Input Impedance to 1M Ohm.

B2961A/62A Setup

1. Connect the banana cables to the B2961A/62A’s Ch1 High/Low Force Terminals

2. Connect the alligator clips to the ends of the 1.1 kΩ resistor.

3. Probe across the 1.1 kΩ resistor to monitor the output using the oscilloscope.

1.1 kΩ

Resistor U8201A

To oscilloscope’s input B2961A/62A

05 | Keysight | Sourcing Precise Current/Voltage Sinusoidal Waveforms Using the B2961A/62A – Demo Guide

LAB1: Source Finite Current/Voltage Sinusoid Waveform

Objective

This demo illustrates the arbitrary

waveform generation function by

sourcing a current/voltage sinusoid

waveform and monitoring the outputs

using an oscilloscope.

Procedure

1. Source nite current/voltage

sinusoid waveform

2. (Optional) Congure phase

marker output

3. Monitor the entire output signal

on its GUI

4. View the list of measurement results

Demonstration

1-1. Source a nite current/voltage sinusoid waveform

1) Press repeatedly until the Channel 1 Single View is displayed.

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

to Voltage source. (If you selected to set the Source function to Current source then it

would source a current waveform.)

3) Press to edit the Source value, and enter 0.5 V to set the Source value to 0.5 V.

4) Press to edit the Limit value, and enter 10 mA to set the Limit value to 10 mA.

5) Press to congure the Monitor parameter,and select to set the

Monitor parameter to Current.

Note:

Although this guide shows a voltage

sinusoid waveform example, you

can easily source a current sinusoid

waveform by selecting Current Source

Mode in step 2.

06 | Keysight | Sourcing Precise Current/Voltage Sinusoidal Waveforms Using the B2961A/62A – Demo Guide

6) Press to toggle the Assist keys, and press to display the Waveform Preview. This

enables you to verify the waveform conguration on the instrument’s GUI.

7) Rotate and press to select the edit Function. Then press repeatedly until

is shown in the Assist keys.

8) Press to turn on the Sinusoid Waveform Output. After turning on the Sinusoid

Waveform Output, you can see that the Source Shape icon has changed to indicate a sinusoid

waveform output.

9) Rotate to select the Channel 1 Waveform Parameters and enter values as shown below.

(Amplitude: 1 V, Offset: 0.5 V, Count: 5, Frequency: 100 Hz)

10) Press repeatedly until the Graph View is shown in the display.

07 | Keysight | Sourcing Precise Current/Voltage Sinusoidal Waveforms Using the B2961A/62A – Demo Guide

11) Press to enable the channel, and then press to source the waveform and monitor

the signal. (The status information will display during the waveform sourcing.)

12) Press to adjust the scale of the graph after the waveform sourcing is complete. You will see

the monitored current result on the B2961A/62A’s GUI as shown below.

Result on B2961A/62A’s GUI

To conrm the output voltage waveform, perform the following procedure.

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

to Voltage.

Now you can see the monitored output voltage waveform on the B2961A/62A’s GUI as shown below

Result on B2961A/62A’s GUI

08 | Keysight | Sourcing Precise Current/Voltage Sinusoidal Waveforms Using the B2961A/62A – Demo Guide

Result on Oscilloscope

Why use the B2960A Series’

Arbitrary Waveform

Generation Function?

Some conventional power supplies

can also generate waveforms but

the signal integrity is not good.

For example, although the B2960A

Series can supply clean & smooth

waveforms as shown below, a

conventional power supply output

has discontinuities.

Conventional Power Supply

B2960A Series

09 | Keysight | Sourcing Precise Current/Voltage Sinusoidal Waveforms Using the B2961A/62A – Demo Guide

1-2. (Optional) Congure phase marker output

If desired you can enable the phase marker output function to dene a specic point on a

waveform anywhere from 0 to 360 degrees. The phase marker output signal is sourced through

the digital I/O port. To monitor the phase marker output signal with an oscilloscope, the

N1294A-031 adapter is needed to connect the digital I/O port to the scope’s input using

a BNC cable.

1) Press repeatedly until the Single View for Channel 1 is shown in the display.

2) Rotate and press to edit the Phase marker output status, and then select to

enable the phase marker output.

3) Rotate and press to edit the Phase marker output value and enter 90 degrees as

shown in the screen capture below.

Note: The default setting routes the phase marker output signal through digital I/O port 1;

however, the signal port can be changed by sending the instrument an external SCPI command

“[:SOURce]:ARB:<CURRent|VOLTage>:SINusoid:PMARker:SIGNal”

4) If you are not on the top Function menu, press repeatedly until you are back

at the top level

At the top level of the Function menu No tree structure is visible

A tree structure is visible

At a lower level in the Function menu

10 | Keysight | Sourcing Precise Current/Voltage Sinusoidal Waveforms Using the B2961A/62A – Demo Guide

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