No part of this manual may be reproduced in
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agreement and written consent from
Keysight Technologies, Inc. as governed by
United States and international copyright
laws.
Manual Part Number
54709-97084
Edition
Ninth edition, April 2020
Available in electronic format only
Published by:
Keysight Technologies, Inc.
1900 Garden of the Gods Road
Colorado Springs, CO 80907 USA
Print History
54709-97000, October 2012
54709-97014, February 2013
54709-97026, September 2013
54709-97037, November 2014
54709-97048, July 2016
54709-97061, April 2017
54709-97072, November 2017
54709-97083, May 2019
54709-97084, April 2020
Warranty
The material contained in this document is
provided "as is," and is subject to being
changed, without notice, in future editions.
Further, to the maximum extent permitted
by applicable law, Keysight disclaims all
warranties, either express or implied, with
regard to this manual and any information
contained herein, including but not limited
to the implied warranties of merchantability
and fitness for a particular purpose.
Keysight shall not be liable for errors or for
incidental or consequential damages in
connection with the furnishing, use, or
performance of this document or of any
information contained herein. Should
Keysight and the user have a separate
written agreement with warranty terms
covering the material in this document that
conflict with these terms, the warranty
terms in the separate agreement shall
control.
Technology License
The hardware and/or software described in
this document are furnished under a license
and may be used or copied only in
accordance with the terms of such license.
U.S. Government Rights
The Software is "commercial computer
software," as defined by Federal Acquisition
Regulation ("FAR") 2.101. Pursuant to FAR
12.212 and 27.405-3 and Department of
Defense FAR Supplement ("DFARS")
227.7202, the U.S. government acquires
commercial computer software under the
same terms by which the software is
customarily provided to the public.
Accordingly, Keysight provides the Software
to U.S. government customers under its
standard commercial license, which is
embodied in its End User License Agreement
(EULA), a copy of which can be found at
www.keysight.com/find/sweula. The
license set forth in the EULA represents the
exclusive authority by which the U.S.
government may use, modify, distribute, or
disclose the Software. The EULA and the
license set forth therein, does not require or
permit, among other things, that Keysight: (1)
Furnish technical information related to
commercial computer software or
commercial computer software
documentation that is not customarily
provided to the public; or (2) Relinquish to, or
otherwise provide, the government rights in
excess of these rights customarily provided
to the public to use, modify, reproduce,
release, perform, display, or disclose
commercial computer software or
commercial computer software
documentation. No additional government
requirements beyond those set forth in the
EULA shall apply, except to the extent that
those terms, rights, or licenses are explicitly
required from all providers of commercial
computer software pursuant to the FAR and
the DFARS and are set forth specifically in
writing elsewhere in the EULA. Keysight shall
be under no obligation to update, revise or
otherwise modify the Software. With respect
to any technical data as defined by FAR
2.101, pursuant to FAR 12.211 and 27.404.2
and DFARS 227.7102, the U.S. government
acquires no greater than Limited Rights as
defined in FAR 27.401 or DFAR 227.7103-5
(c), as applicable in any technical data.
Safety Notices
This product has been designed and tested in
accordance with accepted industry
standards, and has been supplied in a safe
condition. The documentation contains
information and warnings that must be
followed by the user to ensure safe operation
and to maintain the product in a safe
condition.
A CAUTION notice denotes a hazard.
It calls attention to an operating
procedure, practice, or the like that,
if not correctly performed or
adhered to, could result in damage
to the product or loss of important
data. Do not proceed beyond a
CAUTION notice until the indicated
conditions are fully understood and
met.
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly
performed or adhered to, could
result in personal injury or death.
Do not proceed beyond a WARNING
notice until the indicated
conditions are fully understood and
met.
•2- and 4-channel digital storage oscilloscope (DSO) models.
•2+16-channel and 4+16-channel mixed-signal oscilloscope (MSO) models.
An MSO lets you debug your mixed-signal designs using analog signals and
tightly correlated digital signals simultaneously. The 16 digital channels have a
1.25 GSa/s sample rate, with a 250 MHz toggle rate.
•12.1 inch SVGA touchscreen display. The touchscreen makes the oscilloscope
easier to use:
•You can "touch" inside alpha-numeric keypad dialogs to enter file, label,
network, and printer names, etc., instead of using softkeys and the
Entry knob.
•You can drag a finger across the screen to draw rectangular boxes for
zooming in on waveforms or setting up Zone triggers.
•You can touch the blue menu icon in the sidebar to display information or
control dialogs. You can drag (undock) these dialogs out of the sidebar, for
example, to view cursor values and measurements at the same time.
•You can touch other areas of the screen as substitutes for using front panel
keys, softkeys, and knobs.
•Interleaved 4 Mpts or non-interleaved 2 Mpts MegaZoom IV memory for the
fastest waveform update rates, uncompromised.
•All knobs are pushable for making quick selections.
•Trigger types: edge, edge then edge, pulse width, pattern, OR, rise/fall time,
Nth edge burst, runt, setup & hold, video, NFC, and zone.
•Serial decode/trigger options for: CAN/CAN FD/LIN, CXPI, FlexRay, I
•Built-in, license-enabled 2-channel waveform generator with: arbitrary, sine,
square, ramp, pulse, DC, noise, sine cardinal, exponential rise, exponential fall,
cardiac, and Gaussian pulse. Modulated waveforms on WaveGen1 except for
arbitrary, pulse, DC, and noise waveforms.
•USB and LAN ports make printing, saving, and sharing data easy.
•VGA port for displaying the screen on a different monitor.
•A Quick Help system is built into the oscilloscope. Press and hold any key to
display Quick Help. Complete instructions for using the quick help system are
given in "Access the Built-In Quick Help" on page 65.
For more information about InfiniiVision oscilloscopes, see:
For reference information, see:• Chapter 23, “Reference,” starting on page 387
NOTE
When using licensed serial bus
triggering and decode features, see:
• Chapter 24, “CAN/LIN Triggering and Serial Decode,”
starting on page 405
• Chapter 25, “CXPI Triggering and Serial Decode,”
starting on page 427
• Chapter 26, “FlexRay Triggering and Serial Decode,”
starting on page 437
• Chapter 27, “I2C/SPI Triggering and Serial Decode,”
starting on page 447
• Chapter 28, “I2S Triggering and Serial Decode,”
starting on page 467
• Chapter 29, “Manchester/NRZ Triggering and Serial
Decode,” starting on page 477
• Chapter 30, “MIL-STD-1553/ARINC 429 Triggering
and Serial Decode,” starting on page 493
• Chapter 31, “SENT Triggering and Serial Decode,”
starting on page 509
• Chapter 32, “UART/RS232 Triggering and Serial
Decode,” starting on page 523
• Chapter 33, “USB 2.0 Triggering and Serial Decode,”
starting on page 533
• Chapter 34, “USB PD Triggering and Serial Decode,”
starting on page 543
Abbreviated instructions for pressing a series of keys and softkeys
Instructions for pressing a series of keys are written in an abbreviated manner. Instructions for
pressing [Key1], then pressing Softkey2, then pressing Softkey3 are abbreviated as follows:
Press [Key1]> Softkey2 > Softkey3.
The keys may be a front panel [Key] or a Softkey. Softkeys are the six keys located directly
below the oscilloscope display.
Undock Sidebar Dialogs by Dragging / 53
Re-dock Sidebar Dialogs to Split Sidebar / 53
Select Dialog Menus and Close Dialogs / 54
Drag Cursors / 55
Touch Softkeys and Menus On the Screen / 55
Enter Names Using Alpha-Numeric Keypad Dialogs / 56
Change Waveform Offsets By Dragging Ground Reference
Icons / 57
Access Controls and Menus Via the Menu Icon / 58
Turn Channels On/Off and Open Scale/Offset Dialogs / 60
Access the Horizontal Menu and Open the Scale/Delay
Dialog / 60
Access the Trigger Menu, Change the Trigger Mode, and Open the
Trigger Level Dialog / 61
Use a USB Mouse and/or Keyboard for Touchscreen
Controls / 62
Learn the Rear Panel Connectors / 62
Learn the Oscilloscope Display / 63
Access the Built-In Quick Help / 65
2Horizontal Controls
To adjust the horizontal (time/div) scale / 69
To adjust the horizontal delay (position) / 69
Panning and Zooming Single or Stopped Acquisitions / 70
To change the horizontal time mode (Normal, XY, or Roll) / 71
XY Time Mode / 72
To display the zoomed time base / 75
To change the horizontal scale knob's coarse/fine adjustment
setting / 76
To position the time reference (left, center, right, custom) / 77
To set up Generic video triggers / 200
To trigger on a specific line of video / 201
To trigger on all sync pulses / 202
To trigger on a specific field of the video signal / 203
To trigger on all fields of the video signal / 204
To trigger on odd or even fields / 205
Serial Trigger / 208
Zone Qualified Trigger / 209
11Trigger Mode/Coupling
To select the Auto or Normal trigger mode / 214
To select the trigger coupling / 215
To enable or disable trigger noise rejection / 217
To enable or disable trigger HF Reject / 217
To set the trigger holdoff / 218
External Trigger Input / 219
Maximum voltage at oscilloscope external trigger input / 219
Peak-Peak / 259
Maximum / 259
Minimum / 260
Y at X / 260
Amplitude / 260
Top / 260
Base / 261
Overshoot / 261
Preshoot / 263
Average / 263
DC RMS / 264
AC RMS / 264
Ratio / 266
Time Measurements / 266
Period / 267
Frequency / 267
Counter / 268
+ Width / 269
– Width / 269
Burst Width / 269
Duty Cycle / 269
Bit Rate / 270
Rise Time / 270
Fall Time / 270
Time at Edge / 270
To save setup files / 335
To save BMP or PNG image files / 336
To save CSV, ASCII XY, or BIN data files / 336
Length Control / 338
To save Lister data files / 339
To save reference waveform files to a USB storage device / 339
To save masks / 340
To save arbitrary waveforms / 340
To navigate storage locations / 341
To enter file names / 341
Emailing Setups, Screen Images, or Data / 342
Recalling Setups, Masks, or Data / 343
To recall setup files / 344
To recall mask files / 344
To recall reference waveform files from a USB storage
device / 344
To recall arbitrary waveforms / 345
Recalling Default Setups / 345
Performing a Secure Erase / 346
20Print (Screens)
To print the oscilloscope's display / 347
To set up network printer connections / 349
To specify the print options / 350
To specify the palette option / 351
21Utility Settings
I/O Interface Settings / 353
Setting up the Oscilloscope's LAN Connection / 354
Stand-alone (Point-to-Point) Connection to a PC / 356
File Explorer / 356
Setting Oscilloscope Preferences / 359
To choose "expand about" center or ground / 359
To disable/enable transparent backgrounds / 360
To load the default label library / 360
To set up the screen saver / 360
To set Autoscale preferences / 361
Setting the Oscilloscope's Clock / 362
Setting the Rear Panel TRIG OUT Source / 363
Setting the Reference Signal Mode / 363
To supply a sample clock to the oscilloscope / 364
Maximum input voltage at 10 MHz REF connector / 364
To synchronize the timebase of two or more instruments / 365
Enabling Remote Command Logging / 366
Performing Service Tasks / 367
To perform user calibration / 367
To perform hardware self test / 370
To perform front panel self test / 371
To display oscilloscope information / 371
To display the user calibration status / 371
To clean the oscilloscope / 371
To check warranty and extended services status / 371
To contact Keysight / 372
To return the instrument / 372
Interpreting MIL-STD-1553 Lister Data / 498
Searching for MIL-STD-1553 Data in the Lister / 499
Setup for ARINC 429 Signals / 500
ARINC 429 Triggering / 501
ARINC 429 Serial Decode / 503
Interpreting ARINC 429 Decode / 505
ARINC 429 Totalizer / 506
Interpreting ARINC 429 Lister Data / 507
Searching for ARINC 429 Data in the Lister / 508
31SENT Triggering and Serial Decode
Setup for SENT Signals / 509
SENT Triggering / 514
SENT Serial Decode / 516
Interpreting SENT Decode / 517
Interpreting SENT Lister Data / 519
Searching for SENT Data in the Lister / 521
32UART/RS232 Triggering and Serial Decode
Setup for UART/RS232 Signals / 523
UART/RS232 Triggering / 525
UART/RS232 Serial Decode / 527
Interpreting UART/RS232 Decode / 528
UART/RS232 Totalizer / 529
Interpreting UART/RS232 Lister Data / 530
Searching for UART/RS232 Data in the Lister / 530
Inspect the Package Contents / 29
Attaching the Accessory Pouch / 32
Tilt the Oscilloscope for Easy Viewing / 33
Power-On the Oscilloscope / 34
Connect Probes to the Oscilloscope / 35
Input a Waveform / 36
Recall the Default Oscilloscope Setup / 36
Use Autoscale / 37
Compensate Passive Probes / 39
Learn the Front Panel Controls and Connectors / 40
Learn the Touchscreen Controls / 48
Learn the Rear Panel Connectors / 62
Learn the Oscilloscope Display / 63
Access the Built-In Quick Help / 65
This chapter describes the steps you take when using the oscilloscope for the first
time.
Inspect the Package Contents
• Inspect the shipping container for damage.
If your shipping container appears to be damaged, keep the shipping container
or cushioning material until you have inspected the contents of the shipment
for completeness and have checked the oscilloscope mechanically and
electrically.
29
1Getting Started
• Verify that you received the following items and any optional accessories you
may have ordered:
• InfiniiVision 4000 X-Series oscilloscope.
• Power cord (country of origin determines specific type).
Included with the oscilloscope is an accessory pouch that can be attached to the
rear panel. You can use it to store oscilloscope probes and other accessories. To
attach the pouch:
1 Remove these two screws.
2 Secure the accessory pouch to the rear panel using the removed screws.
The air intake and exhaust areas must be free from obstructions. Unrestricted air
flow is required for proper cooling. Always ensure that the air intake and exhaust
areas are free from obstructions.
The fan draws air in from the left side and bottom of the oscilloscope and pushes it
out behind the oscilloscope.
Getting Started1
WARNING
CAUTION
CAUTION
When using the oscilloscope in a bench-top setting, provide at least 2" clearance
at the sides and 4" (100 mm) clearance above and behind the oscilloscope for
proper cooling.
To po wer-on the
oscilloscope
1 Connect the power cord to the rear of the oscilloscope, then to a suitable AC
voltage source. Route the power cord so the oscilloscope's feet and legs do not
pinch the cord.
2 The oscilloscope automatically adjusts for input line voltages in the range 100
to 240 VAC. The line cord provided is matched to the country of origin.
Always use a grounded power cord. Do not defeat the power cord ground.
3 Press the power switch.
The power switch is located on the lower left corner of the front panel. The
oscilloscope will perform a self-test and will be operational in a few seconds.
Connect Probes to the Oscilloscope
1 Connect the oscilloscope probe to an oscilloscope channel BNC connector.
2 Connect the probe's retractable hook tip to the point of interest on the circuit or
device under test. Be sure to connect the probe ground lead to a ground point
on the circuit.
50Ω input: 5 Vrms Input protection is enabled in 50 Ω mode and the 50 Ω load will
disconnect if greater than 5 Vrms is detected. However the inputs could still be damaged,
depending on the time constant of the signal. The 50 Ω input protection only functions
when the oscilloscope is powered on.
When measuring voltages over 30 V, use a 10:1 probe.
1Getting Started
CAUTION
WARNING
Defeating the ground connection and "floating" the oscilloscope chassis will probably
result in inaccurate measurements and may also cause equipment damage. The probe
ground lead is connected to the oscilloscope chassis and the ground wire in the power
cord. If you need to measure between two live points, use a differential probe with
sufficient dynamic range.
Do not negate the protective action of the ground connection to the oscilloscope. The
oscilloscope must remain grounded through its power cord. Defeating the ground
creates an electric shock hazard.
Input a Waveform
The first signal to input to the oscilloscope is the Demo 2, Probe Comp signal. This
signal is used for compensating probes.
1 Connect an oscilloscope probe from channel 1 to the Demo 2 (Probe Comp)
2 Connect the probe's ground lead to the ground terminal (next to the Demo 2
To recall the default oscilloscope setup:
1 Press [Default Setup].
The default setup restores the oscilloscope's default settings. This places the
oscilloscope in a known operating condition. The major default settings are:
Use Autoscale
Getting Started1
Table 2 Default Configuration Settings
HorizontalNormal mode, 100 µs/div scale, 0 s delay, center time reference.
Vertical (Analog)Channel 1 on, 5 V/div scale, DC coupling, 0 V position, 1 MΩ impedance.
TriggerEdge trigger, Auto trigger mode, 0 V level, channel 1 source, DC coupling, rising
OtherAcquire mode normal, [Run/Stop] to Run, cursors and measurements off.
LabelsAll custom labels that you have created in the Label Library are preserved (not
erased), but all channel labels will be set to their original names.
In the Save/Recall Menu, there are also options for restoring the complete factory
settings (see "Recalling Default Setups" on page 345) or performing a secure
erase (see "Performing a Secure Erase" on page 346).
Use [Auto Scale] to automatically configure the oscilloscope to best display the
input signals.
1 Press [Auto Scale].
You should see a waveform on the oscilloscope's display similar to this:
2 If you want to return to the oscilloscope settings that existed before, press Undo
Autoscale.
3 If you want to enable "fast debug" autoscaling, change the channels
autoscaled, or preserve the acquisition mode during autoscale, press Fast
Debug, Channels, or Acq Mode.
These are the same softkeys that appear in the Autoscale Preferences Menu.
See "To set Autoscale preferences" on page 361.
If you see the waveform, but the square wave is not shaped correctly as shown
above, perform the procedure "Compensate Passive Probes" on page 39.
If you do not see the waveform, make sure the probe is connected securely to the
front panel channel input BNC and to the left side, Demo 2, Probe Comp terminal.
Auto Scale analyzes any waveforms present at each channel and at the external
trigger input. This includes the digital channels, if connected.
Auto Scale finds, turns on, and scales any channel with a repetitive waveform that
has a frequency of at least 25 Hz, a duty cycle greater than 0.5%, and an
amplitude of at least 10 mV peak-to-peak. Any channels where no signal is found
are turned off.
The trigger source is selected by looking for the first valid waveform starting with
external trigger, then continuing with the lowest number analog channel up to the
highest number analog channel, and finally (if digital probes are connected) the
highest number digital channel.
During Autoscale, the delay is set to 0.0 seconds, the horizontal time/div (sweep
speed) setting is a function of the input signal (about 2 periods of the triggered
signal on the screen), and the triggering mode is set to Edge.
Compensate Passive Probes
Each oscilloscope passive probe must be compensated to match the input
characteristics of the oscilloscope channel to which it is connected. A poorly
compensated probe can introduce significant measurement errors.
1 Input the Probe Comp signal (see "Input a Waveform" on page 36).
2 Press [Default Setup] to recall the default oscilloscope setup (see "Recall the
Default Oscilloscope Setup" on page 36).
3 Press [Auto Scale] to automatically configure the oscilloscope for the Probe
Comp signal (see "Use Autoscale" on page 37).
4 Press the channel key to which the probe is connected ([1], [2], etc.).
5 In the Channel Menu, press Probe.
6 In the Channel Probe Menu, press Probe Check; then, follow the instructions
on-screen.
Getting Started1
If necessary, use a nonmetallic tool (supplied with the probe) to adjust the
trimmer capacitor on the probe for the flattest pulse possible.
On N2894A probes, the trimmer capacitor is located on the probe BNC
connector.
Softkey specifically refers to the six keys that are directly below the display. The
legend for these keys is directly above them, on the display. Their functions
change as you navigate through the oscilloscope's menus.
For the following figure, refer to the numbered descriptions in the table that
follows.
Getting Started1
14. Tools keys
1. Power switch
2. Softkeys
3. [Intensity] key
4. Entry knob
6. Trigger controls
5. Waveform keys
18. Demo 2, Ground,
and Demo 1
terminals
17. Analog
channel
inputs
19. USB
Host
ports
15. [Help] key
13. File keys
8. Run Control keys
12. Measure controls
11. Additional
waveform controls
7. Horizontal controls
10. [Auto Scale] key
9. [Default Setup] key
16. Vertical controls
21. Waveform
generator
outputs
20. EXT TRIG IN
connector
Back
Back
1.Power switchPress once to switch power on; press again to switch power off. See "Power-On the
2.SoftkeysThe functions of these keys change based upon the menus shown on the display directly
3.[Intensity] keyPress the key to illuminate it. When illuminated, turn the Entry knob to adjust waveform
The Back/Up key moves up in the softkey menu hierarchy. At the top of the hierarchy, the
intensity.
You can vary the intensity control to bring out signal detail, much like an analog oscilloscope.
Digital channel waveform intensity is not adjustable.
More details about using the Intensity control to view signal detail are on "To adjust
waveform intensity" on page 155.
Back/Up key turns the menus off, and oscilloscope information is shown instead.
1Getting Started
4.Entry knobThe Entry knob is used to select items from menus and to change values. The function of the
Entry knob changes based upon the current menu and softkey selections.
Note that the curved arrow symbol above the entry knob illuminates whenever the entry
knob can be used to select a value. Also, note that when the Entry knob symbol appears
on a softkey, you can use the Entry knob, to select values.
Often, rotating the Entry knob is enough to make a selection. Sometimes, you can push the
Entry knob to enable or disable a selection. Pushing the Entry knob also makes popup menus
disappear.
5.Waveform keys[Analyze] key — Press this key to access analysis features like:
• Trigger level setting.
• Measurement threshold setting.
• Video trigger automatic set up and display.
• The USB 2.0 signal quality analysis licensed application.
• Mask testing (see Chapter 15, “Mask Testing,” starting on page 285).
• The power measurement and analysis licensed application.
• Digital voltmeter (DVM) (see Chapter 16, “Digital Voltmeter and Counter,” starting on
page 299).
The [Acquire] key lets you select Normal, Peak Detect, Averaging, or High Resolution
acquisition modes (see "Selecting the Acquisition Mode" on page 227) and use
segmented memory (see "Acquiring to Segmented Memory" on page 236).
The [Display] key lets you access the menu where you can enable persistence (see "To set or
clear persistence" on page 157), clear the display, and adjust the display grid (graticule)
intensity (see "To adjust the grid intensity" on page 159).
[Touch] key — Press this key to disable/enable the touchscreen.
6.Trigger controlsThese controls determine how the oscilloscope triggers to capture data. See Chapter 10,
“Triggers,” starting on page 171 and Chapter 11, “Trigger Mode/Coupling,” starting on page
• Horizontal scale knob — Turn the knob in the Horizontal section that is marked
to adjust the time/div (sweep speed) setting. The symbols under the knob indicate that this
control has the effect of spreading out or zooming in on the waveform using the horizontal
scale.
• Horizontal position knob — Turn the knob marked to pan through the waveform data
horizontally. You can see the captured waveform before the trigger (turn the knob
clockwise) or after the trigger (turn the knob counterclockwise). If you pan through the
waveform when the oscilloscope is stopped (not in Run mode) then you are looking at the
waveform data from the last acquisition taken.
•[Horiz] key — Press this key to open the Horizontal Menu where you can select XY and Roll
modes, enable or disable Zoom, enable or disable horizontal time/division fine adjustment,
and select the trigger time reference point.
• Zoom key — Press the zoom key to split the oscilloscope display into Normal and
Zoom sections without opening the Horizontal Menu.
•[Search] key — Lets you search for events in the acquired data.
•[Navigate] keys — Press these keys to navigate through captured data via time, search
events, or segmented memory acquisition. See "Navigating the Time Base" on
page 79.
For more information see Chapter 2, “Horizontal Controls,” starting on page 67.
Getting Started1
8.Run Control keysWhen the [Run/Stop] key is green, the oscilloscope is running, that is, acquiring data when
trigger conditions are met. To stop acquiring data, press [Run/Stop].
When the [Run/Stop] key is red, data acquisition is stopped. To start acquiring data, press
[Run/Stop].
To capture and display a single acquisition (whether the oscilloscope is running or stopped),
press [Single]. The [Single] key is yellow until the oscilloscope triggers.
For more information, see "Running, Stopping, and Making Single Acquisitions (Run
Control)" on page 221.
9.[Default Setup] keyPress this key to restore the oscilloscope's default settings (details on "Recall the Default
Oscilloscope Setup" on page 36).
10.[Auto Scale] keyWhen you press the [Auto Scale] key, the oscilloscope will quickly determine which channels
have activity, and it will turn these channels on and scale them to display the input signals.
See "Use Autoscale" on page 37.
•[Math] key — provides access to math (add, subtract, etc.) waveform functions. See
Chapter 4, “Math Waveforms,” starting on page 93.
•[Ref] key — provides access to reference waveform functions. Reference waveforms are
saved waveforms that can be displayed and compared against other analog channel or
math waveforms. Also, measurements can be made on reference waveforms. See
Chapter 5, “Reference Waveforms,” starting on page 127.
• [Digital] key — Press this key to turn the digital channels on or off (the arrow to the left will
illuminate).
When the arrow to the left of the [Digital] key is illuminated, the upper multiplexed knob
selects (and highlights in red) individual digital channels, and the lower multiplexed knob
positions the selected digital channel.
If a trace is repositioned over an existing trace the indicator at the left edge of the trace will
change from Dnn designation (where nn is a one or two digit channel number from 0 to 15)
to D*. The "*" indicates that two or more channels are overlaid.
You can rotate the upper knob to select an overlaid channel, then rotate the lower knob to
position it just as you would any other channel.
For more information on digital channels see Chapter 6, “Digital Channels,” starting on
page 131.
•[Serial] key — This key is used to enable serial decode. The multiplexed scale and position
knobs are not used with serial decode. For more information on serial decode, see
Chapter 7, “Serial Decode,” starting on page 149.
• Multiplexed scale knob — This scale knob is used with Math, Ref, or Digital waveforms,
whichever has the illuminated arrow to the left. For math and reference waveforms, the
scale knob acts like an analog channel vertical scale knob.
• Multiplexed position knob — This position knob is used with Math, Ref, or Digital
waveforms, whichever has the illuminated arrow to the left. For math and reference
waveforms, the position knob acts like an analog channel vertical position knob.
13.File keysPress the [Save/Recall] key to save or recall a waveform or setup. See Chapter 19,
“Save/Email/Recall (Setups, Screens, Data),” starting on page 333.
The [Print] key opens the Print Configuration Menu so you can print the displayed waveforms.
See Chapter 20, “Print (Screens),” starting on page 347.
14.Tools keysThe Tools keys consist of:
• [Utility] key — Press this key to access the Utility Menu, which lets you configure the
oscilloscope's I/O settings, use the file explorer, set preferences, access the service menu,
and choose other options. See Chapter 21, “Utility Settings,” starting on page 353.
• [Quick Action] key — Press this key to perform the selected quick action: measure all
snapshot, print, save, recall, freeze display, and more. See "Configuring the [Quick
Action] Key" on page 372.
•[Wave Gen1], [Wave Gen2] keys — Press these keys to access waveform generator
functions. See Chapter 18, “Waveform Generator,” starting on page 311.
15.[Help] keyOpens the Help Menu where you can display overview help topics and select the Language.
See also "Access the Built-In Quick Help" on page 65.
• Analog channel on/off keys — Use these keys to switch a channel on or off, or to access a
channel's menu in the softkeys. There is one channel on/off key for each analog channel.
• Vertical scale knob — There are knobs marked for each channel. Use these knobs
to change the vertical sensitivity (gain) of each analog channel.
• Vertical position knobs — Use these knobs to change a channel's vertical position on the
display. There is one Vertical Position control for each analog channel.
For more information, see Chapter 3, “Vertical Controls,” starting on page 83.
17.Analog channel
inputs
Attach oscilloscope probes or BNC cables to these BNC connectors.
With the InfiniiVision 4000 X-Series oscilloscopes, you can set the input impedance of the
analog channels to either 50 Ω or 1 MΩ. See "To specify channel input impedance" on
page 86.
The InfiniiVision 4000 X-Series oscilloscopes also provide the AutoProbe interface. The
AutoProbe interface uses a series of contacts directly below the channel's BNC connector to
transfer information between the oscilloscope and the probe. When you connect a compatible
probe to the oscilloscope, the AutoProbe interface determines the type of probe and sets the
oscilloscope's parameters (units, offset, attenuation, coupling, and impedance) accordingly.
19.USB Host portsThese ports are for connecting a USB mass storage device, printer, mouse, or keyboard to the
• Demo 2 terminal — After a [Default Setup], this terminal outputs the Probe Comp signal
which helps you match a probe's input capacitance to the oscilloscope channel to which it
is connected. See "Compensate Passive Probes" on page 39. With certain licensed
features, the oscilloscope can also output demo or training signals on this terminal.
• Ground terminal — Use the ground terminal for oscilloscope probes connected to the Demo
1 or Demo 2 terminals.
• Demo 1 terminal — The oscilloscope can output training signals on this and the Demo 2
terminal. See: [Help] > Training Signals > Training Signals.
oscilloscope.
Connect a USB compliant mass storage device (flash drive, disk drive, etc.) to save or recall
oscilloscope setup files and reference waveforms or to save data and screen images. See
Chapter 19, “Save/Email/Recall (Setups, Screens, Data),” starting on page 333.
To print, connect a USB compliant printer. For more information about printing see
Chapter 20, “Print (Screens),” starting on page 347.
You can also use the USB port to update the oscilloscope's system software when updates are
available.
You do not need to take special precautions before removing the USB mass storage device
from the oscilloscope (you do not need to "eject" it). Simply unplug the USB mass storage
device from the oscilloscope when the file operation is complete.
CAUTION:Do not connect a host computer to the oscilloscope's USB host port. Use the
device port. A host computer sees the oscilloscope as a device, so connect the host computer
to the oscilloscope's device port (on the rear panel). See "I/O Interface Settings" on
page 353.
There is a third USB host port on the back panel.
20.EXT TRIG IN
connector
21.Waveform generator
outputs
External trigger input BNC connector. See "External Trigger Input" on page 219 for an
explanation of this feature.
Built-in, license-enabled 2-channel waveform generator can output arbitrary, sine, square,
ramp, pulse, DC, noise, sine cardinal, exponential rise, exponential fall, cardiac, or Gaussian
pulse waveforms on the Gen Out 1 or Gen Out 2 BNC connectors. Modulated waveforms are
available on WaveGen1 except for arbitrary, pulse, DC, and noise waveforms. Press the [Wave Gen1] or [Wave Gen2] keys to set up the waveform generator. See Chapter 18, “Waveform
Generator,” starting on page 311.
Front panel overlays, which have translations for the English front panel keys and
label text, are available in 10 languages. The appropriate overlay is included when
the localization option is chosen at time of purchase.
To install a front panel overlay:
1 Gently pull on the front panel knobs to remove them.
2 Insert the overlay's side tabs into the slots on the front panel.
Getting Started1
3 Reinstall the front panel knobs.
Front panel overlays may be ordered from www.keysight.com/find/parts using the
following part numbers:
• Flick — allows very fast browsing of waveforms. It is similar to browsing on
tablets and smartphones. It is much easier to flick than to continually turn a
knob.
• Drag — drag your finger across the screen to change the horizontal delay.
Drag your finger up or down to change the vertical offset.
To select waveforms, tap them. The waveform closest horizontally to the tap
location is selected. The selected waveform is indicated by the ground marker
with the filled background (channel 1 in the following example).
8.USB Host portThis port functions identically to the USB host port on the front panel. USB
Attach the power cord here.
This is where you can attach a Kensington lock for securing the instrument.
Trigger output BNC connector. See "Setting the Rear Panel TRIG OUT
Source" on page 363.
For synchronizing the timebase of multiple instruments. See "Setting the
Reference Signal Mode" on page 363.
See "To perform user calibration" on page 367.
Connect the digital probe cable to this connector (MSO models only). See
Chapter 6, “Digital Channels,” starting on page 131.
Lets you connect an external monitor or projector to provide a larger
display or to provide a display at a viewing position away from the
oscilloscope.
The oscilloscope's built-in display remains on even when an external
display is connected. The video output connector is always active.
For optimal video quality and performance, we recommend you use a
shielded video cable with ferrite cores.
Host Port is used for saving data from the oscilloscope and loading
software updates. See also USB Host port (see page 46).
9.USB Device
port
10.LAN portLets you print to network printers (see Chapter 20, “Print (Screens),”
This port is for connecting the oscilloscope to a host PC. You can issue
remote commands from a host PC to the oscilloscope via the USB device
port. See "Remote Programming with Keysight IO Libraries" on
page 380.
starting on page 347) and access the oscilloscope's built-in web server.
See Chapter 22, “Web Interface,” starting on page 375 and "Accessing
the Web Interface" on page 376.
Learn the Oscilloscope Display
The oscilloscope display contains acquired waveforms, setup information,
measurement results, and the softkey definitions.
Status lineThe top line of the display contains vertical, horizontal, and trigger setup
Display areaThe display area contains the waveform acquisitions, channel identifiers, and
information.
analog trigger, and ground level indicators. Each analog channel's information
appears in a different color.
Signal detail is displayed using 256 levels of intensity. For more information
about viewing signal detail see "To adjust waveform intensity" on
page 155.
For more information about display modes see Chapter 8, “Display Settings,”
starting on page 155.
Getting Started1
Back
Sidebar
information and
controls area
Menu lineThis line normally contains menu name or other information associated with the
Softkey labelsThese labels describe softkey functions. Typically, softkeys let you set up
The sidebar information area can contain summary, cursors, measurements, or
digital voltmeter information dialogs or it can contain navigation and other
control dialogs.
For more information, see:
• "Select Sidebar Information or Controls" on page 52
• "Undock Sidebar Dialogs by Dragging" on page 53
selected menu.
additional parameters for the selected mode or menu.
Pressing the Back/Up key at the top of the menu hierarchy turns off softkey
labels and displays additional status information describing channel offset and
other configuration parameters.
Access the Built-In Quick Help
To view Quick Help1 Press and hold the key or softkey for which you would like to view help.
To select the user interface and Quick Help language:
1 Press [Help], then press the Language softkey.
2 Repeatedly press and release the Language softkey or rotate the Entry knob until
the desired language is selected.
The following languages are available: English, French, German, Italian, Japanese,
Korean, Portuguese, Russian, Simplified Chinese, Spanish, and Traditional
Chinese.
To adjust the horizontal (time/div) scale / 69
To adjust the horizontal delay (position) / 69
Panning and Zooming Single or Stopped Acquisitions / 70
To change the horizontal time mode (Normal, XY, or Roll) / 71
To display the zoomed time base / 75
To change the horizontal scale knob's coarse/fine adjustment setting / 76
To position the time reference (left, center, right, custom) / 77
Searching for Events / 77
Navigating the Time Base / 79
The horizontal controls include:
• The horizontal scale and position knobs.
•The [Horiz] key for accessing the Horizontal Menu.
• The zoom key for quickly enabling/disabling the split-screen zoom display.
•The [Search] key for finding events on analog channels or in serial decode.
•The [Navigate] keys for navigating time, search events, or segmented memory
acquisitions.
• Touchscreen controls for setting the horizontal scale and position (delay),
accessing the Horizontal Menu, and navigating.
The following figure shows the Horizontal Menu which appears after pressing the
[Horiz] key.
The Horizontal Menu lets you select the time mode (Normal, XY, or Roll), enable
Zoom, set the time base fine control (vernier), and specify the time reference.
The current sample rate is displayed in the Summary box in the right-side
information area.
To adjust the horizontal (time/div) scale
1 Turn the large horizontal scale (sweep speed) knob marked to
change the horizontal time/div setting.
You can also make this adjustment using the touchscreen. See "Access the
Horizontal Menu and Open the Scale/Delay Dialog" on page 60.
Notice how the time/div information in the status line changes.
The ∇ symbol at the top of the display indicates the time reference point.
The horizontal scale knob works (in the Normal time mode) while acquisitions are
running or when they are stopped. When running, adjusting the horizontal scale
knob changes the sample rate. When stopped, adjusting the horizontal scale knob
lets you zoom into acquired data. See "Panning and Zooming Single or Stopped
Acquisitions" on page 70.
Note that the horizontal scale knob has a different purpose in the Zoom display.
See "To display the zoomed time base" on page 75.
Horizontal Controls2
To adjust the horizontal delay (position)
1 Turn the horizontal delay (position) knob ().
The trigger point moves horizontally, pausing at 0.00 s (mimicking a
mechanical detent), and the delay value is displayed in the status line.
You can also make this adjustment using the touchscreen. See "Flick or Drag to
Scale, Position, and Change Offset" on page 50 and "Access the Horizontal
Menu and Open the Scale/Delay Dialog" on page 60.
Changing the delay time moves the trigger point (solid inverted triangle)
horizontally and indicates how far it is from the time reference point (hollow
inverted triangle ∇). These reference points are indicated along the top of the
display grid.
Figure 2 shows the trigger point with the delay time set to 200 µs. The delay time
number tells you how far the time reference point is located from the trigger point.
When delay time is set to zero, the delay time indicator overlays the time reference
indicator.
All events displayed left of the trigger point happened before the trigger occurred.
These events are called pre-trigger information, and they show events that led up
to the trigger point.
Everything to the right of the trigger point is called post-trigger information. The
amount of delay range (pre-trigger and post-trigger information) available
depends on the time/div selected and memory depth.
The horizontal position knob works (in the Normal time mode) while acquisitions
are running or when they are stopped. When running, adjusting the horizontal
scale knob changes the sample rate. When stopped, adjusting the horizontal scale
knob lets you zoom into acquired data. See "Panning and Zooming Single or
Stopped Acquisitions" on page 70.
Note that the horizontal position knob has a different purpose in the Zoom display.
See "To display the zoomed time base" on page 75.
Panning and Zooming Single or Stopped Acquisitions
When the oscilloscope is stopped, use the horizontal scale and position knobs to
pan and zoom your waveform. The stopped display may contain several
acquisitions worth of information, but only the last acquisition is available for pan
and zoom.
The ability to pan (move horizontally) and scale (expand or compress horizontally)
an acquired waveform is important because of the additional insight it can reveal
about the captured waveform. This additional insight is often gained from seeing
the waveform at different levels of abstraction. You may want to view both the big
picture and the specific little picture details.
The ability to examine waveform detail after the waveform has been acquired is a
benefit generally associated with digital oscilloscopes. Often this is simply the
ability to freeze the display for the purpose of measuring with cursors or printing
the screen. Some digital oscilloscopes go one step further by including the ability
to further examine the signal details after acquiring them by panning through the
waveform and changing the horizontal scale.
There is no limit imposed on the scaling ratio between the time/div used to
acquire the data and the time/div used to view the data. There is, however, a
useful limit. This useful limit is somewhat a function of the signal you are
analyzing.
The screen will still contain a relatively good display if you zoom-in horizontally by a factor of
1000 and zoom-in vertically by a factor of 10 to display the information from where it was
acquired. Remember that you can only make automatic measurements on displayed data.
To change the horizontal time mode (Normal, XY, or Roll)
1 Press [Horiz].
2 In the Horizontal Menu, press Time Mode; then, select:
• Normal — the normal viewing mode for the oscilloscope.
In the Normal time mode, signal events occurring before the trigger are
plotted to the left of the trigger point (▼) and signal events after the trigger
plotted to the right of the trigger point.
• XY — XY mode changes the display from a volts-versus-time display to a
volts-versus-volts display. The time base is turned off. Channel 1 amplitude
is plotted on the X-axis and Channel 2 amplitude is plotted on the Y-axis.
You can use XY mode to compare frequency and phase relationships
between two signals. XY mode can also be used with transducers to display
strain versus displacement, flow versus pressure, volts versus current, or
voltage versus frequency.
Use the cursors to make measurements on XY mode waveforms.
For more information about using XY mode for measurements, refer to "XY
Time Mode" on page 72.
• Roll — causes the waveform to move slowly across the screen from right to
left. It only operates on time base settings of 50 ms/div and slower. If the
current time base setting is faster than the 50 ms/div limit, it will be set to
50 ms/div when Roll mode is entered.
In Roll mode there is no trigger. The fixed reference point on the screen is the
right edge of the screen and refers to the current moment in time. Events
that have occurred are scrolled to the left of the reference point. Since there
is no trigger, no pre-trigger information is available.
ExampleThis exercise shows a common use of the XY display mode by measuring the
If you would like to pause the display in Roll mode press the [Single] key. To
clear the display and restart an acquisition in Roll mode, press the [Single]
key again.
Use Roll mode on low-frequency waveforms to yield a display much like a
strip chart recorder. It allows the waveform to roll across the display.
The XY time mode converts the oscilloscope from a volts-versus-time display to a
volts-versus-volts display using two input channels. Channel 1 is the X-axis input,
channel 2 is the Y-axis input. You can use various transducers so the display could
show strain versus displacement, flow versus pressure, volts versus current, or
voltage versus frequency.
phase difference between two signals of the same frequency with the Lissajous
method.
1 Connect a sine wave signal to channel 1, and a sine wave signal of the same
frequency but out of phase to channel 2.
2 Press the [Auto Scale] key, press the [Horiz] key; then, press Time Mode and select
"XY".
3 Center the signal on the display with the channel 1 and 2 position ( ) knobs.
Use the channel 1 and 2 volts/div knobs and the channel 1 and 2 Fine softkeys
to expand the signal for convenient viewing.
The phase difference angle (θ) can be calculated using the following formula
(assuming the amplitude is the same on both channels):
Figure 4 Phase difference measurements, automatic and using cursors
7 Calculate the phase difference using the formula below.
For example, if the first ΔY value is 2.297 and the second ΔY value is 1.319:
Z-Axis Input in XY Display Mode (Blanking)
When you select the XY display mode, the time base is turned off. Channel 1 is the X-axis
input, channel 2 is the Y-axis input, and the EXT TRIG IN is the Z-axis input. If you only want to
see portions of the Y versus X display, use the Z-axis input. Z-axis turns the trace on and off
(analog oscilloscopes called this Z-axis blanking because it turned the beam on and off).
When Z is low (<1.4 V), Y versus X is displayed; when Z is high (>1.4 V), the trace is turned off.
These markers show the
beginning and end of the
Zoom window
Normal
window
Time/div
for zoomed
window
Time/div
for normal
window
Delay time
momentarily displays
when the Horizontal
position knob is turned
Zoom
window
Signal
anomaly
expanded
in zoom
window
Select
Zoom
Zoom, formerly called Delayed sweep mode, is a horizontally expanded version of
the normal display. When Zoom is selected, the display divides in half. The top
half of the display shows the normal time/div window and the bottom half
displays a faster Zoom time/div window.
The Zoom window is a magnified portion of the normal time/div window. You can
use Zoom to locate and horizontally expand part of the normal window for a more
detailed (higher-resolution) analysis of signals.
To turn on (or off ) Zoom:
1 Press the zoom key (or press the [Horiz] key and then the Zoom softkey).
The area of the normal display that is expanded is outlined with a box and the rest
of the normal display is ghosted. The box shows the portion of the normal sweep
that is expanded in the lower half.
To change the time/div for the Zoom window, turn the horizontal scale (sweep
speed) knob. As you turn the knob, the zoomed window time/div is highlighted in
the status line above the waveform display area. The Horizontal scale (sweep
speed) knob controls the size of the box.
The Horizontal position (delay time) knob sets the left-to-right position of the
zoom window. The delay value, which is the time displayed relative to the trigger
point) is momentarily displayed in the upper-right portion of the display when the
delay time () knob is turned.
Negative delay values indicate you're looking at a portion of the waveform before
the trigger event, and positive values indicate you're looking at the waveform after
the trigger event.
To change the time/div of the normal window, turn off Zoom; then, turn the
horizontal scale (sweep speed) knob.
For information about using zoom mode for measurements, refer to "To isolate a
pulse for Top measurement" on page 260 and "To isolate an event for frequency
measurement" on page 267.
To change the horizontal scale knob's coarse/fine adjustment
setting
1 Push the horizontal scale knob (or press [Horiz] > Fine) to toggle between fine
and coarse adjustment of the horizontal scale.
When Fine is enabled, turning the horizontal scale knob changes the time/div
(displayed in the status line at the top of the display) in smaller increments. The
time/div remains fully calibrated when Fine is on.
When Fine is turned off, the Horizontal scale knob changes the time/div setting in
a 1-2-5 step sequence.
To position the time reference (left, center, right, custom)
Time reference is the reference point on the display for delay time (horizontal
position).
1 Press [Horiz].
2 In the Horizontal Menu, press Time Ref; then, select:
• Left — the time reference is set to one major division from the left edge of the
display.
• Center — the time reference is set to the center of the display.
• Right — the time reference is set to one major division from the right edge of
the display.
• Custom Location — lets you place the time reference location at a percent of
the graticule width (where 0% is the left edge and 100% is the right edge).
A small hollow triangle (∇) at the top of the display grid marks the position of the
time reference. When delay time is set to zero, the trigger point indicator (▼)
overlays the time reference indicator.
The time reference position sets the initial position of the trigger event within
acquisition memory and on the display, with delay set to 0.
Turning the Horizontal scale (sweep speed) knob expands or contracts the
waveform about the time reference point (∇). See "To adjust the horizontal
(time/div) scale" on page 69.
Turning the Horizontal position () knob in Normal mode (not Zoom) moves the
trigger point indicator (▼) to the left or right of the time reference point (∇). See
"To adjust the horizontal delay (position)" on page 69.
Searching for Events
You can use the [Search] key and menu to search for Edge, Pulse Width, Rise/Fall
Time, Runt, Frequency Peaks, and Serial events on the analog channels.
Setting up searches (see "To set up searches" on page 78) is similar to setting up
triggers. In fact, except for Frequency Peaks and Serial events, you can copy
search setups to trigger setups and vice-versa (see "To copy search setups" on
page 78).
Searches are different than triggers in that they use the measurement threshold
settings instead of trigger levels.
Found search events are marked with white triangles at the top of the graticule,
and the number of events found is displayed in the menu line just above the
softkey labels.
1 Press [Search].
2 In the Search Menu, press Search; then, turn the Entry knob to select the search
type.
3 Use the remaining softkeys to set up the selected search type.
In most cases, setting up searches is similar to setting up triggers:
• For setting up Edge searches, see "Edge Trigger" on page 174.
• For setting up Pulse Width searches, see "Pulse Width Trigger" on
page 178.
• For setting up Rise/Fall Time searches, see "Rise/Fall Time Trigger" on
page 185.
• For setting up Runt searches, see "Runt Trigger" on page 192.
• For setting up Frequency Peak searches, see "Searching for FFT Peaks" on
page 108.
• For setting up Serial searches, see "Serial Trigger" on page 208 and
"Searching Lister Data" on page 153.
Remember that searches use the measurement threshold settings instead of
trigger levels. Use the Thresholds softkey in the Search Menu to access the
Measurement Threshold Menu. See "Measurement Thresholds" on page 279.
To copy search setups
Except for Frequency Peak and Serial event search setups, you can copy search
setups to trigger setups and vice-versa.
1 Press [Search].
2 In the Search Menu, press Search; then, turn the Entry knob to select the search
• Press Copy to Trigger to copy the setup for the selected search type to the
same trigger type. For example, if the current search type is Pulse Width,
pressing Copy to Trigger copies the search settings to the Pulse Width trigger
settings and selects the Pulse Width trigger.
• Press Copy from Trigger to copy the trigger setup for the selected search type
to the search setup.
• To undo a copy, press Undo Copy.
The softkeys in the Search Copy Menu may not be available when one of the
settings cannot be copied or there is no trigger type that corresponds to the
search type.
Navigating the Time Base
You can use the [Navigate] key and controls to navigate through:
• Captured data (see "To navigate time" on page 79).
• Search events (see "To navigate search events" on page 80).
• Segments, when segmented memory acquisitions are turned on (see "To
navigate segments" on page 80).
Horizontal Controls2
You can also access navigation controls on the touchscreen. See "Select Sidebar
Information or Controls" on page 52.
To navigate time
When acquisitions are stopped, you can use the navigation controls to play
through the captured data.
1 Press [Navigate].
2 In the Navigate Menu, press Navigate; then, select Time.
3 Press the navigation keys to play backward, stop, or play forward in
time. You can press the or keys multiple times to speed up the
playback. There are three speed levels.
You can also access navigation controls on the touchscreen. See "Select Sidebar
When acquisitions are stopped, you can use the navigation controls to go to found
search events (set using the [Search] key and menu, see "Searching for Events" on
page 77).
1 Press [Navigate].
2 In the Navigate Menu, press Navigate; then, select Search.
3 Press the back and forward keys to go to the previous or next search
event.
When searching Serial decode:
• You can press the stop key to set or clear a mark.
•The Auto zoom softkey specifies whether the waveform display is automatically
zoomed to fit the marked row as you navigate.
• Pressing the Scroll Lister softkey lets you use the Entry knob to scroll through
data rows in the Lister display.
You can also access navigation controls on the touchscreen. See "Select Sidebar
Information or Controls" on page 52.
To navigate segments
When the segmented memory acquisition is enabled and acquisitions are stopped,
you can use the navigation controls to play through the acquired segments.
1 Press [Navigate].
2 In the Navigate Menu, press Navigate; then, select Segments.
3 Press Play Mode; then, select:
• Manual — to play through segments manually.
In the Manual play mode:
• Press the back and forward keys to go to the previous or next
segment.
• Press the softkey to go to the first segment.
• Press the softkey to go to the last segment.
• Auto — to play through segments in an automated fashion.
To turn waveforms on or off (channel or math) / 84
To adjust the vertical scale / 85
To adjust the vertical position / 85
To specify channel coupling / 86
To specify channel input impedance / 86
To specify bandwidth limiting / 87
To change the vertical scale knob's coarse/fine adjustment setting / 87
To invert a waveform / 88
Setting Analog Channel Probe Options / 88
The vertical controls include:
• The vertical scale and position knobs for each analog channel.
• The channel keys for turning a channel on or off and accessing the channel's
softkey menu.
• Touchscreen controls for setting the vertical scale and position (offset) and
accessing the Channel menus.
The following figure shows the Channel 1 Menu that appears after pressing the [1]
channel key.
83
3Vertical Controls
Channel,
Volts/div
Channel 1
ground
level
Trigger
source
Trigger level
or threshold
Channel 2
ground
level
The ground level of the signal for each displayed analog channel is identified by
the position of the icon at the far-left side of the display.
To turn waveforms on or off (channel or math)
1 Press an analog channel key turn the channel on or off (and to display the
channel's menu).
When a channel is on, its key is illuminated.
You can also do this using the touchscreen. See "Turn Channels On/Off and
You must be viewing the menu for a channel before you can turn it off. For example, if channel
1 and channel 2 are turned on and the menu for channel 2 is being displayed, to turn channel
1 off, press [1] to display the channel 1 menu; then, press [1] again to turn channel 1 off.
To adjust the vertical scale
1 Turn the large knob above the channel key marked to set the vertical
scale (volts/division) for the channel.
You can also do this using the touchscreen. See "Turn Channels On/Off and
Open Scale/Offset Dialogs" on page 60.
The vertical scale knob changes the analog channel scale in a 1-2-5 step
sequence (with a 1:1 probe attached) unless fine adjustment is enabled (see "To
change the vertical scale knob's coarse/fine adjustment setting" on page 87).
Vertical Controls3
The analog channel Volts/Div value is displayed in the status line.
The default mode for expanding the signal when you turn the volts/division knob
is vertical expansion about the ground level of the channel; however, you can
change this to expand about the center of the display. See "To choose "expand
about" center or ground" on page 359.
To adjust the vertical position
1 Turn the small vertical position knob ( ) to move the channel's waveform up or
down on the display.
You can also make this adjustment using the touchscreen. See "Change
Waveform Offsets By Dragging Ground Reference Icons" on page 57 and "Turn
Channels On/Off and Open Scale/Offset Dialogs" on page 60.
The offset voltage value represents the voltage difference between the vertical
center of the display and the ground level () icon. It also represents the voltage
at the vertical center of the display if vertical expansion is set to expand about
ground (see "To choose "expand about" center or ground" on page 359).
Coupling changes the channel's input coupling to either AC (alternating current)
or DC (direct current).
If the channel is DC coupled, you can quickly measure the DC component of the signal by
simply noting its distance from the ground symbol.
If the channel is AC coupled, the DC component of the signal is removed, allowing you to use
greater sensitivity to display the AC component of the signal.
1 Press the desired channel key.
2 In the Channel Menu, press the Coupling softkey to select the input channel
coupling:
• DC — DC coupling is useful for viewing waveforms as low as 0 Hz that do not
have large DC offsets.
• AC — AC coupling is useful for viewing waveforms with large DC offsets.
When AC coupling is chosen, you cannot select 50Ω mode. This is done to
prevent damage to the oscilloscope.
AC coupling places a 10 Hz high-pass filter in series with the input waveform
that removes any DC offset voltage from the waveform.
Note that Channel Coupling is independent of Trigger Coupling. To change trigger
coupling see "To select the trigger coupling" on page 215.
To specify channel input impedance
When you connect an AutoProbe, self-sensing probe, or a compatible InfiniiMax probe, the
oscilloscope automatically configures the analog input channels to the correct impedance.
1 Press the desired channel key.
2 In the Channel Menu, press Imped (impedance); then, select either:
• 50 Ohm — matches 50 ohm cables commonly used in making high frequency
measurements, and 50 ohm active probes.
When 50 Ohm input impedance is selected, it is displayed with the channel
information on-screen.
When AC coupling is selected (see "To specify channel coupling" on
page 86) or excessive voltage is applied to the input, the oscilloscope
automatically switches to 1M Ohm mode to prevent possible damage.
• 1M Ohm — is for use with many passive probes and for general-purpose
measurements. The higher impedance minimizes the loading effect of the
oscilloscope on the device under test.
This impedance matching gives you the most accurate measurements because
reflections are minimized along the signal path.
See Also• For more information on probing, visit: www.keysight.com/find/scope_probes
• Information about selecting a probe can be found in document number
Keysight Oscilloscope Probes and Accessories Selection Guide (part number
5989-6162EN), available at www.keysight.com.
To specify bandwidth limiting
1 Press the desired channel key.
2 In the Channel Menu, press the BW Limit softkey to enable or disable bandwidth
limiting.
When bandwidth limit is on, the maximum bandwidth for the channel is
approximately 20 MHz. For waveforms with frequencies below this, turning
bandwidth limit on removes unwanted high frequency noise from the waveform.
The bandwidth limit also limits the trigger signal path of any channel that has BW Limit turned on.
To change the vertical scale knob's coarse/fine adjustment setting
1 Push the channel's vertical scale knob (or press the channel key and then the
Fine softkey in the Channel Menu) to toggle between fine and coarse
You can also do this using the touchscreen. See "Turn Channels On/Off and
Open Scale/Offset Dialogs" on page 60.
When Fine adjustment is selected, you can change the channel's vertical
sensitivity in smaller increments. The channel sensitivity remains fully calibrated
when Fine is on.
The vertical scale value is displayed in the status line at the top of the display.
When Fine is turned off, turning the volts/division knob changes the channel
sensitivity in a 1-2-5 step sequence.
To invert a waveform
1 Press the desired channel key.
2 In the Channel Menu, press the Invert softkey to invert the selected channel.
When Invert is selected, the voltage values of the displayed waveform are inverted.
Invert affects how a channel is displayed. However, when using basic triggers, the
oscilloscope attempts to maintain the same trigger point by changing trigger
settings.
Inverting a channel also changes the result of any math function selected in the
Waveform Math Menu or any measurement.
Setting Analog Channel Probe Options
1 Press the probe's associated channel key.
2 In the Channel Menu, press the Probe softkey to display the Channel Probe
Menu.
This menu lets you select additional probe parameters such as attenuation
factor and units of measurement for the connected probe.
The Channel Probe Menu changes depending on the type of probe connected.
For passive probes (such as the N2862A/B, N2863A/B, N2889A, N2890A,
10073C, 10074C, or 1165A probes), the Probe Check softkey appears; it guides
you through the process of compensating probes.
For some active probes (such as InfiniiMax probes), the oscilloscope can
accurately calibrate its analog channels for the probe. When you connect a
probe that can be calibrated, the Calibrate Probe softkey appears (and the probe
attenuation softkey may change). See "To calibrate a probe" on page 90.
See Also• "To specify the channel units" on page 89
• "To specify the probe attenuation" on page 89
• "To specify the probe skew" on page 90
To specify the channel units
1 Press the probe's associated channel key.
2 In the Channel Menu, press Probe.
3 In the Channel Probe Menu, press Units; then, select:
• Volts — for a voltage probe.
• Amps — for a current probe.
Channel sensitivity, trigger level, measurement results, and math functions will
reflect the measurement units you have selected.
Vertical Controls3
To specify the probe attenuation
This is set automatically if the oscilloscope can identify the connected probe. See
Analog channel inputs (see page 46).
The probe attenuation factor must be set properly for accurate measurement
results.
If you connect a probe that is not automatically identified by the oscilloscope, you
can manually set the attenuation factor as follows:
1 Press the channel key.
2 Press the Probe softkey until you have selected how you want to specify the
attenuation factor, choosing either Ratio or Decibels.
3 Turn the Entry knob to set the attenuation factor for the connected probe.
When measuring voltage values, the attenuation factor can be set from 0.001:1 to
10000:1 in a 1-2-5 sequence.
When measuring current values with a current probe, the attenuation factor can
be set from 10 V/A to 0.0001 V/A.
When specifying the attenuation factor in decibels, you can select values from
-20 dB to 80 dB.
If Amps is chosen as the units and a manual attenuation factor is chosen, then the
units as well as the attenuation factor are displayed above the Probe softkey.
When measuring time intervals in the nanoseconds (ns) range, small differences in
cable length can affect the measurement. Use Skew to remove cable-delay errors
between any two channels.
1 Probe the same point with both probes.
2 Press one of the probes associated channel key.
3 In the Channel Menu, press Probe.
4 In the Channel Probe Menu, press Skew; then, select the desired skew value.
Each analog channel can be adjusted ±100 ns in 10 ps increments for a total of
200 ns difference.
The skew setting is not affected by pressing [Default Setup] or [Auto Scale].
To calibrate a probe
The Calibrate Probe softkey guides you through the process of calibrating probes.
For certain active probes, such as InfiniiMax probes, the oscilloscope can
accurately calibrate its analog channels for the probe. When you connect a probe
that can be calibrated, the Calibrate Probe softkey in the Channel Probe Menu
becomes active.
1 First, plug your probe into one of the oscilloscope channels.
This could be, for example, an InfiniiMax probe amplifier/probe head with
attenuators attached.
2 Connect the probe to the left side, Demo 2, Probe Comp terminal, and the
probe ground to the ground terminal.
When calibrating a differential probe, connect the positive lead to the Probe Comp terminal
and the negative lead to the ground terminal. You may need to connect an alligator clip to the
ground lug to allow a differential probe to span between the Probe Comp test point and
ground. A good ground connection ensures the most accurate probe calibration.
3 Press the Channel on/off key to turn the channel on (if the channel is off).
4 In the Channel Menu, press the Probe softkey.
5 In the Channel Probe Menu, the second softkey from the left is for specifying
your probe head (and attenuation). Repeatedly press this softkey until the
probe head selection matches the attenuator you are using.
The choices are:
• 10:1 single-ended browser (no attenuator).
• 10:1 differential browser (no attenuator).
• 10:1 (+6 dB Atten) single-ended browser.
• 10:1 (+6 dB Atten) differential browser.
• 10:1 (+12 dB Atten) single-ended browser.
• 10:1 (+12 dB Atten) differential browser.
• 10:1 (+20 dB Atten) single-ended browser.
• 10:1 (+20 dB Atten) differential browser.
6 Press the Calibrate Probe softkey and follow the instructions on the display.
For more information on InfiniiMax probes and accessories, see the probe's User's Guide.
To display math waveforms / 93
To adjust the math waveform scale and offset / 95
Units for Math Waveforms / 95
Math Operators / 96
Math Transforms / 98
Math Filters / 117
Math Visualizations / 120
You can define up to four math functions. One math function waveform can be
displayed at a time. The math function waveform is displayed in light purple.
Math functions can be performed on analog channels or they can be performed on
lower math functions when using operators other than add, subtract, multiply, or
divide.
To display math waveforms
1 Press the [Math] key on the front panel to display the Waveform Math Menu.
2 Press the Display Math softkey and turn the Entry knob to select the math
function you want to display. Then, either push the Entry knob or press the
Display Math softkey again to display the selected math function.
3 Use the Operator softkey to select an operator, transform, filter, or visualization.
93
4Math Waveforms
TIP
TIP
For more information on the operators, see:
• "Math Operators" on page 96
• "Math Transforms" on page 98
• "Math Filters" on page 117
• "Math Visualizations" on page 120
4 Use the Source 1 softkey to select the analog channel, lower math function, or
reference waveform on which to perform math. You can rotate the Entry knob or
repetitively press the Source 1 softkey to make your selection.
Higher math functions can operate on lower math functions when using
operators other than the simple arithmetic operations (+, -, *, /). For example, if
Math 1 is set up as a subtract operation between channels 1 and 2, the Math 2
function could be set up as a FFT operation on the Math 1 function. These are
called cascaded math functions.
To cascade math functions, select the lower math function using the Source 1
softkey.
When cascading math functions, to get the most accurate results, be sure to vertically scale
lower math functions so that their waveforms take up the full screen without being clipped.
5 If you selected an arithmetic operator for the math function, use the Source 2
softkey to select the second source for the arithmetic operation.
6 To re-size and re-position the math waveform, see "To adjust the math
waveform scale and offset" on page 95.
Math Operating Hints
If the analog channel or math function is clipped (not fully displayed on screen) the resulting
displayed math function will also be clipped.
Once the function is displayed, the analog channel(s) may be turned off for better viewing of
the math waveform.
The vertical scaling and offset of each math function can be adjusted for ease of viewing and
measurement considerations.
The math function waveform can be measured using [Cursors] and/or [Meas].
1 Make sure the multiplexed scale and position knobs above and below the [Math]
key are selected for the math waveform.
If the arrow to the left of the [Math] key is not illuminated, press the key.
2 Use the multiplexed scale and position knobs above and below the [Math] key to
re-size and re-position the math waveform.
Math Scale and Offset are Set Automatically
Any time the currently displayed math function definition is changed, the function is
automatically scaled for optimum vertical scale and offset. If you manually set scale and offset
for a function, select a new function, then select the original function, the original function will
be automatically rescaled.
See Also• "Units for Math Waveforms" on page 95
Math Waveforms4
Units for Math Waveforms
Units for each input channel can be set to Volts or Amps using the Units softkey in
the channel's Probe Menu. Units for math function waveforms are:
A scale unit of U (undefined) will be displayed for math functions when two source
channels are used and they are set to dissimilar units and the combination of units
cannot be resolved.
Math Operators
Math operators perform arithmetic operations (like add, subtract, or multiply) on
analog input channels.
• "Add or Subtract" on page 96
• "Multiply or Divide" on page 97
Add or Subtract
When you select add or subtract, the Source 1 and Source 2 values are added or
subtracted point by point, and the result is displayed.
You can use subtract to make a differential measurement or to compare two
waveforms.
If your waveforms' DC offsets are larger than the dynamic range of the
oscilloscope's input channels you will need to use a differential probe instead.
Math Waveforms4
Figure 5 Example of Subtract Channel 2 from Channel 1
See Also• "Units for Math Waveforms" on page 95
Multiply or Divide
When you select the multiply or divide math function, the Source 1 and Source 2
values are multiplied or divided point by point, and the result is displayed.
The divide by zero case places holes (that is, zero values) in the output waveform.
Multiply is useful for seeing power relationships when one of the channels is
proportional to the current.
Figure 6 Example of Multiply Channel 1 by Channel 2
See Also• "Units for Math Waveforms" on page 95
Math Transforms
Math transforms perform a transform function (like differentiate, integrate, FFT, or
square root) on an analog input channel or on the result of an arithmetic
operation.
d/dt (differentiate) calculates the discrete time derivative of the selected source.
You can use differentiate to measure the instantaneous slope of a waveform. For
example, the slew rate of an operational amplifier may be measured using the
differentiate function.
Because differentiation is very sensitive to noise, it is helpful to set acquisition
mode to Averaging (see "Selecting the Acquisition Mode" on page 227).
d/dt plots the derivative of the selected source using the "average slope estimate
at 4 points" formula. The equation is:
Math Waveforms4
Where:
• d = differential waveform.
• y = channel 1, 2, 3, 4, or Math 1, Math 2, Math 3 (lower math function) data
points.
dt (integrate) calculates the integral of the selected source. It shows the
accumulated amount of change.
You can use integrate to calculate the energy of a pulse in volt-seconds or
measure the area under a waveform by measuring the difference in the integrate
function value across the pulse or waveform.
dt plots the integral of the source using the "Trapezoidal Rule". The equation is: