Scope Noise Characterization
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Table of Contents
Table of Contents
List of Figures................................................................................................................................................................................7
List of Tables................................................................................................................................................................................. 8
Welcome....................................................................................................................................................................................... 9
Getting help and support.............................................................................................................................................................10
Product documents.............................................................................................................................................................. 10
Conventions......................................................................................................................................................................... 10
Technical support................................................................................................................................................................. 10
Getting started.............................................................................................................................................................................11
Software requirements......................................................................................................................................................... 11
Supported probes.................................................................................................................................................................11
View software version.......................................................................................................................................................... 11
Virtual keypad and multi purpose knob................................................................................................................................ 11
Icon descriptions.................................................................................................................................................................. 12
Application directories..........................................................................................................................................................13
File name extensions........................................................................................................................................................... 13
Operating basics......................................................................................................................................................................... 14
Launching the application.................................................................................................................................................... 14
Application controls..............................................................................................................................................................14
Options menu.......................................................................................................................................................................15
Characterize tab...................................................................................................................................................................15
Noise Database tab............................................................................................................................................................. 17
Updating the database..................................................................................................................................................18
Result tab.............................................................................................................................................................................18
Querying Scope RN values for Custom or Automatic Mode.........................................................................................19
Querying Scope RN values for Current Scope Setting Mode.......................................................................................19
Saving and recalling setup.......................................................................................................................................................... 20
Saving a setup..................................................................................................................................................................... 20
Recalling a setup................................................................................................................................................................. 20
Recalling default setup.........................................................................................................................................................20
Tutorial........................................................................................................................................................................................ 21
Performing characterization with Automatic or Custom Mode............................................................................................. 21
Noise Characterization..................................................................................................................................................21
Compensating noise value........................................................................................................................................... 23
Performing characterization with Current Scope Setting mode........................................................................................... 25
Noise Characterization..................................................................................................................................................25
Compensating noise value........................................................................................................................................... 27
Parameters..................................................................................................................................................................................29
About Parameters................................................................................................................................................................ 29
Characterize tab parameters............................................................................................................................................... 29
Result tab parameters..........................................................................................................................................................30
GPIB Commands........................................................................................................................................................................ 31
About the GPIB program......................................................................................................................................................31
Argument types....................................................................................................................................................................31
SNC:CHARacterize..............................................................................................................................................................31
Scope Noise Characterization Help 5
Table of Contents
SNC:CHARacterize:REFID..................................................................................................................................................31
SNC:CHARacterize:ATIChannel..........................................................................................................................................32
SNC:CHARacterize:CH<x>..................................................................................................................................................32
SNC:CHARacterize:MATH<x>.............................................................................................................................................33
SNC:CHARacterize:INCLUDEPRobe..................................................................................................................................33
SNC:CHARacterize:MODE..................................................................................................................................................33
SNC:CHARacterize:SCALEMAx..........................................................................................................................................34
SNC:CHARacterize:SCALEMIn...........................................................................................................................................34
SNC:CHARacterize:SCALEStep..........................................................................................................................................34
SNC:CHARacterize:OFFSETMIn.........................................................................................................................................35
SNC:CHARacterize:OFFSETMAx....................................................................................................................................... 35
SNC:CHARacterize:OFFSETStep....................................................................................................................................... 35
SNC:CHARacterize:BANDWIDTHSTArt.............................................................................................................................. 36
SNC:CHARacterize:BANDWIDTHSTOp..............................................................................................................................36
SNC:CHARacterize:SAMPLERate.......................................................................................................................................36
SNC:CHARacterize:MESSAGEtimer...................................................................................................................................36
SNC:CHARacterize:RECORDLength.................................................................................................................................. 37
SNC:CHARacterize:MEASREPEATcount............................................................................................................................37
SNC:Result:REFID.............................................................................................................................................................. 38
SNC:Result:CHannel........................................................................................................................................................... 38
SNC:Result:SCOPESETting................................................................................................................................................38
SNC:Result:SCALE............................................................................................................................................................. 39
SNC:Result:OFFSET........................................................................................................................................................... 39
SNC:Result:POSition........................................................................................................................................................... 39
SNC:Result:SAMPlerate...................................................................................................................................................... 40
SNC:Result:BANDWIDTH....................................................................................................................................................40
SNC:Result:INCLUDEPRobe...............................................................................................................................................40
SNC:Result:SCOPERNrms..................................................................................................................................................41
SNC:Result:ADDITIONALInfo..............................................................................................................................................41
SNC:RECALLDEFAULTSetup............................................................................................................................................. 41
SNC:RECALLSetup............................................................................................................................................................. 41
SNC:SAVESetup..................................................................................................................................................................41
SNC:CLEARDatabase......................................................................................................................................................... 42
SNC:LASTError?................................................................................................................................................................. 42
SNC:VERsion...................................................................................................................................................................... 42
Index........................................................................................................................................................................................... 43
Scope Noise Characterization Help 6
List of Figures
List of Figures
Figure 1: Scope Noise Characterization home screen..................................................................................................................9
Figure 2: Scope Noise Characterization Version Number and Copyright information.................................................................11
Figure 3: Virtual numeric keypad.................................................................................................................................................12
Figure 4: Virtual keyboard........................................................................................................................................................... 12
Figure 5: Starting the Scope Noise Application from Analyze menu...........................................................................................14
Figure 6: Scope Noise Characterization application window...................................................................................................... 14
Figure 7: Characterize tab view.................................................................................................................................................. 16
Figure 8: Custom mode configuration......................................................................................................................................... 17
Figure 9: Noise Database tab displaying characterization values...............................................................................................18
Figure 10: View of the Result tab................................................................................................................................................ 19
Figure 11: Vertical setup..............................................................................................................................................................21
Figure 12: Scope Noise Characterization applicaiton with Characterize tab selected................................................................ 21
Figure 13: Probe calibration information pop-up window............................................................................................................ 22
Figure 14: Probe-tip information pop-up window........................................................................................................................ 22
Figure 15: Pop-up for 50 Ohm termination for channel...............................................................................................................22
Figure 16: Database update during on-going noise characterization..........................................................................................23
Figure 17: Characterization completion pop-up while probe is connected..................................................................................23
Figure 18: Compensating Noise Value........................................................................................................................................23
Figure 19: Showing Math expression in "Additional Info" box.....................................................................................................24
Figure 20: Noise Compensation for RN measurement in the configuration panel DPOJET.......................................................24
Figure 21: Noise Compensation for TN@BER measurement in the configuration panel DPOJET............................................ 24
Figure 22: Vertical Setup showing Atten icon..............................................................................................................................25
Figure 23: Characterize tab when “Current Scope Setting mode” is selected............................................................................ 25
Figure 24: Probe Calibration Pop-up...........................................................................................................................................26
Figure 25: Disconnect DUT and connect probe with nominal tip................................................................................................ 26
Figure 26: Pop-up for 50 Ohm termination for channel...............................................................................................................26
Figure 27: Characteriztaion completed pop-up........................................................................................................................... 27
Figure 28: Result tab showing probe model and SL no.............................................................................................................. 27
Figure 29: Showing Math expression in "Additional Info" box.....................................................................................................27
Figure 30: Noise Compensation for RN measurement in the configuration panel DPOJET.......................................................28
Figure 31: Noise Compensation for TN@BER measurement in the configuration panel DPOJET............................................ 28
Scope Noise Characterization Help 7
List of Tables
List of Tables
Table 1: Scope Noise Characterization application documents.................................................................................................. 10
Table 2: Icon descriptions............................................................................................................................................................12
Table 3: Application directories................................................................................................................................................... 13
Table 4: File name extensions.....................................................................................................................................................13
Table 5: Options menu settings...................................................................................................................................................15
Table 6: Example of scope noise values in Custom mode..........................................................................................................17
Table 7: Characterization tab options, parameters with default values.......................................................................................29
Table 8: Result tab options, parameters with default values.......................................................................................................30
Table 9: Argument types............................................................................................................................................................. 31
Table 10: Message Timer command NR3 Value.........................................................................................................................37
Scope Noise Characterization Help 8
Welcome
Welcome
The Oscilloscope's vertical noise arises mainly from the analog front-end and digitizing process. The oscilloscope noise will degrade the
actual measurement accuracy, especially when we are measuring low-amplitude signals. Hence, it is important to remove the oscilloscope
noise from the measurement results.
Scope Noise Characterization is a standalone application used to characterize noise for Tektronix Performance Digital Oscilloscopes
(DPO7000C, DPO70000C/D/DX, DSA70000C/D, MSO70000/C/DX, and DPO70000SX Series).
Figure 1: Scope Noise Characterization home screen
Key features:
• Supports Tektronix Performance Digital Oscilloscopes (DPO7000C, DPO70000C/D/DX, DSA70000C/D, MSO70000/C/DX, and
DPO70000SX Series).
• Supports characterizing the noise for the given range of values.
• Supports Noise characterization on both ATI and TekConnect channels.
• Supports Math expressions.
• Characterize the noise of the oscilloscope only or with the probe (and tip).
• Supports PI interface for all user controls.
• Interface to read the noise value for a specific oscilloscope configuration.
• Save/Recall of application setup file.
• Indicates the validity of the noise values.
Scope Noise Characterization Help 9
Getting help and support
Getting help and support
Product documents
Use the product documents for more information on the application functions, understand the theory of operation, how to remotely program
or operate the application, and do other tasks.
Table 1: Scope Noise Characterization application documents
To learn about Use this document
How to use the application Scope Noise Characterization Help
PDF version of this document can be downloaded from www.tek.com/downloads
Compiled HTML (CHM) version is integrated with the application. Press F1 key from the
keyboard to launch the help.
Conventions
This document uses the following conventions:
• When steps require a sequence of selections using the application interface, the “>” delimiter marks each transition between a menu
and an option.
• For example, Analyze > Scope Noise Characterization
• The term “application” refers to Scope Noise Characterization application.
• The abbreviation used for “Scope Noise Characterization” will be “SNC”.
• The term “DUT” is an abbreviation for Device Under Test.
• The term “select” is a generic term that applies to the methods of choosing an option: with a mouse or with the touch screen.
Technical support
Tektronix values your feedback on our products. To help us serve you better, please send us your suggestions, ideas, or comments on
your application or oscilloscope. Contact Tektronix through mail, telephone, or the Web site. See Contacting Tektronix at the front of this
document for contact information.
When you contact Tektronix Technical Support, please include the following information (be as specific as possible):
General information
• All instrument model numbers
• Hardware options, if any
• Modules used
• Your name, company, mailing address, phone number, FAX number
• Please indicate if you would like to be contacted by Tektronix about your suggestion or comments.
Application specific information
• Software version number
• Description of the problem such that technical support can duplicate the problem
• If possible, save the setup files for all the instruments used and the application
Scope Noise Characterization Help 10
Getting started
Getting started
Software requirements
Scope Noise Characterization application requires DPOJET version 10.4.0.1 or later.
Supported probes
The application supports the following probes:
• P76xx
• P77xx
View software version
Click Options > About to view application details such as the software version number, application name, and copyright details. Refer to
Figure 2 on page 11
Figure 2: Scope Noise Characterization Version Number and Copyright information
The version displayed above is indicative only, the version number displayed will vary depending upon the exact version of
Note:
the application installed.
Virtual keypad and multi purpose knob
Select the
reference IDs.
icon on any of the entry text boxes and use the virtual keypad to enter alphanumeric values, such as voltage levels and
Scope Noise Characterization Help 11
Figure 3: Virtual numeric keypad
Getting started
Figure 4: Virtual keyboard
The MP Knob Reference and are the identifiers that show which Multi-Purpose Knob (MPK) may be used as an alternate means
to control a parameter; turn the knob on the oscilloscope front panel to adjust the corresponding parameter, refer to Figure 3 on page 12
and Figure 4 on page 12. Also, the value can be entered directly on the MPK display component.
Icon descriptions
This section lists the icons displayed in the Scope Noise Characterization application and their description.
Table 2: Icon descriptions
ICON Description
This icon identifies warning / error.
This icon displays the description for various characterization
modes.
Scope Noise Characterization Help 12
Getting started
Application directories
Table 3: Application directories
Default directory Used for
C:\Program Files\TekApplications\SNC
C:\ProgramData\Tektronix\TekApplications\
SNM\Database
The installation directory for Scope Noise Characterization
application.
Noise characterization database.
File name extensions
Table 4: File name extensions
File Extension Description
“.set” Binary file containing scope noise application setup information in a
proprietary format.
Scope Noise Characterization Help 13
Operating basics
Launching the application
Select Analyze > Scope Noise Characterization from the oscilloscope menu bar to launch the application.
Tip: You can use the shortcut key Alt+A+N to launch the Scope Noise Characterization application.
Operating basics
Figure 5: Starting the Scope Noise Application from Analyze menu
Analyze menu entries may vary depending upon the application(s) installed.
Note:
After you click Scope Noise Characterization application, the following window appears, as Figure 6 on page 14.
Figure 6: Scope Noise Characterization application window
Application controls
This section describes the controls in the Scope Noise Characterization application.
Scope Noise Characterization Help 14
Options menu
To access the Options menu, click in the upper-right corner of the application. It has the following selections:
Operating basics
Table 5: Options menu settings
Menu Function
Recall Recalls setup from the selected file in directory.
Recall Default Setup Recalls setup with default configurations.
Save As Saves the setup with a different file name.
Clear Database Clears all the noise entries from the database.
Help Displays the Scope Noise Characterization help.
About Displays the Scope Noise Characterization application details.
Characterize tab
The Characterize tab can be used to configure settings to perform scope noise characterization.
Scope Noise Characterization Help 15
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