User Manual - Rohde & Schwarz
Contents
1. Capture The capture button starts a capturing process This includes the following steps gt Configure the instrument Wait for the trigger and start the sweep gt Wait for completion Read the trace data to the PC Depending on the speed of the selected remote control interface transferring a larger number of samples may take a significant amount of time Abort Aborts the capturing process in the state where the analyzer waits for a trigger event The capturing process can be repeated multiple times Previously recorded data is overwritten by new data Once all data is captured the Next gt gt button becomes available and leads to the page for rescaling the captured data After the rescaling mode is selected the captured data can be saved as a waveform file2. ane oe nep ee a RRL ERE 23 8 The Signal Creation Module eene 24 8 1 Waveform Types ssie nenne eite tence ated eden noU RR rei Et iva genna ORE ERR eK Dua Ru db c 28 BAA JM 28 8 12 2mm 29 9 The Waveform 32 10 The Marker 36 11 The Level Scaling 38 12 The Wrap Around Analysis Module 40 13 The Clipping Modules pina sanc ERE P PR RR Mn sEaE ARES 42 Manual 3 R amp S ARB Toolbox PLUS 14 The Waveform 44 14 1 Th Track EGIt r ecce eiit eric eerie rae erac 45 14 44 14 Center Information esee Ree eee Ede 46 14 12 Offline P 47 14 1 3 Wrapped Around 48 14 1 4 TUNGA O c E 49 14 1 5 Fade In and 50 14 1 6 Se
3. This however may not be sufficient when frequency offsets are used Segments that differ in clock rate require resampling during the building process These segments are indicated with an R symbol in the track editor In automatic mode the target clock rate is automatically adjusted during edit operations Manual 62 R amp S ARB Toolbox PLUS Manual 14 6 Building the Target Waveform The target waveform is built from the entire scenario by pressing the Run button The result is a single waveform file that contains the content specified in the composer window Starting a waveform build is only possible if all waveform files are available and no segment is marked as offline The building process consists mainly of the following steps Read and analyze all source waveforms Resample segments to the target clock rate where necessary Frequency shift segments where necessary Assemble target waveform from all segments Rescale and save target waveform At the beginning of the build process the number of available CPU cores is detected ARB Toolbox PLUS will spawn up to eight parallel processes for steps that can be carried out simultaneously The build process will create several temporary files per CPU process in the system s temporary directory If the number of system resources is limited and errors occur during the build process parallel processing may be disabled using the following command line option no m
4. Frequency difference between last and current sample R amp S ARB Toolbox PLUS 14 4 3 Truncation First Sample Last Sample By default all samples from the waveform are used for a segment Setting the first sample to a value greater than zero truncates the waveform at the beginning The last sample may be changed to less than the maximum or remaining sample count for cutting away a signal portion from the waveform end 14 4 4 Position in Output Start Sample The start sample sets the number of the first sample for the current segment in the output waveform The start sample number is related to the target sample rate Start Time The start time sets the point at which the current segment in the output waveform begins Manual 58 14 4 5 Flags Truncate Wrap Around Usually all segment content beyond the end of the waveform composition is truncated Setting the segment mode to Wrap Around places the data that is beyond the end of the waveform composition at its beginning Use Markers When this flag is enabled the marker data from the segment waveform is added to the output waveform 14 4 6 Fade In and Fade Out Fading changes the signal amplitude at the beginning or end of the segment from zero to the full level This settings is useful for reducing spectral regrowth at the joint between two segments TIO TH ED eC HE 0 0 s 500 0 us 1 0 ms 1 5 ms 2 0 ms 2 5 ms 3 0 ms Fading i
5. environment and displays a warning if the runtime environment cannot be detected In this case file transfers to or from an instrument are not possible Local file system operations remain functional R amp S ARB Toolbox PLUS Manual 3 Command Line Options ARB Toolbox PLUS provides several command line options These command line options are generally not required and are mainly used for debugging purposes debug The debug option generates additional debugging information in the message window This option should only be used for debugging purposes because it slows down the application significantly This option disables loading the VISA interface during program startup If VISA is disabled instrument communications are no longer possible However all local file system operations remain functional This option is mainly intended for Linux based systems in which the VISA kernel module may not function correctly after a kernel update In such cases attempting to load VISA may crash the application no multi process The waveform composer detects the number of CPU cores and spawns up to eight parallel processes This option disables CPU detection and runs a single process only This option is useful when the amount of CPU resources is limited and the building process is not possible because of these resource limitations R amp S ARB Toolbox PLUS 4 Getting Started When the application is sta
6. is always located on the left side at sample zero The end point can be determined automatically or set by the user By default waveform segments that reach beyond the end of the target waveform are truncated In some applications however it is better if the end is not truncated instead it should wrap around to the beginning of the target waveform These wrapped around segments are indicated by a hatched section at the beginning of the composition This section cannot be selected directly by the cursor line or the mouse Instead the true segment position must be used COA DAA i A 0 0 s 500 0 us 1 0 ms 1 5 ms The wrap around state is defined in the Segment Settings dialog This dialog can be invoked by double clicking any part of the segment Entire segments or even multiple segments in a row can be wrapped around to the beginning of the waveform 14 1 4 Truncation Waveform segments can be truncated at the beginning or the end This is useful when only a fraction of the signal should be used in the output signal The truncation is defined in the Segment Settings dialog This dialog can be invoked by double clicking anywhere in the segment When segment truncation occurs a hatched section marks its location at the beginning or at the end of the segment The length of the hatched area is independent of the amount of truncation Uode dou e pu Up LE Hebdos 0 0 2 0 ms 4 0 5 14 1 5 Fad
7. path Create Folder Creates a new folder inside the folder where the currently selected file is located The following characters are not allowed as part of the folder name V amp 96 The folder cannot be created if another entry with the same name already exists inside the selected folder Rename Renames the selected file The following characters are not allowed as part of the file name V amp The file cannot be renamed if another entry with the same name already exists inside the current folder Delete Deletes the selected entry Manual 23 R amp S ARB Toolbox PLUS 8 The Signal Creation Module The signal creation module is started via the context menu in the local file system browser This module is used to build various analog modulated signals such as AM FM PM and noise The signal creation wizard guides the user step by step through the configuration and waveform building process Waveform Type Sweep Signal Linear ARB 2 Fo PI Maximum 200MHz Minimum 100 kHz The first page of the wizard configures the signal type as well as the minimum and maximum permissible ARB clock rate Please see your instrument s operating manual for information about the ARB clock rate limits The final waveform s ARB clock rate is determined by the signal creation wizard It is not possible for the user to set this rate directly The Next gt gt button advanc
8. requires entry of the instrument s host name or IP address or a complete VISA resource string For instruments connected via LAN the host name is usually the instrument name followed by the serial number for example rssmu200a100123 Typical examples are listed below IP address 10 111 10 123 Host name rssmu200a255123 VISA resource string TCPIP 10 111 10 123 INSTR TCPIP 10 111 10 123 5025 SOCKET GPIBO0 28 INSTR Firewalls Please note that firewalls or system settings may prevent LAN access to the instrument ARB Toolbox PLUS tries to detect the availability of required TCP IP ports prior to attempting to open the VISA link Error messages are displayed in the program message area Scan GPIB Scans the local GPIB bus for available instruments and adds the detected instruments to the list Scan USB Scans for valid instruments that are connected via USB Scan LAN Scans for valid instruments in the local LAN Refresh All available instruments are marked with a colored icon whereas unavailable instruments use a dimmed icon Available instrument nodes also provide additional instrument information when the node is expanded The Refresh button updates the status of all listed instruments Manual 13 Delete The Delete button removes the selected instrument from the list If the selected instrument is currently used in one of the browser windows the associated browser is set to local file system mode
9. the frequency changes I Q vs Time IQ Constellation Manual 28 R amp S ARB Toolbox PLUS 8 1 2 Expression The waveform is built from data calculated by two mathematical expressions These two expressions either describe I Q amplitude and phase or amplitude and frequency versus time The syntax of the mathematical expression parser is described below Variables t 5 Constants T _N _CLK _ST Pa Operators Random numbers rand grand Trigonometric functions sin x sinh asinh x asin x Manual current time 0 T current sample O N total time total number of samples clock rate in Hz sample time 1 CLK the value of Pi multiplication addition subtraction division y by the power of y random number between O 1 gaussian random number COS X tan x cosh x tanh x acosh x atanh x acos x atan x 29 R amp S ARB Toolbox PLUS Logarithmic functions log2 x Other functions 10910 ln sqrt x square root sign x sign 1 if x 0 1 if x20 rint x round to nearest integer abs x absolute value floor largest previous integer number ceil x smallest following integer number mod x y modulo division Piecewise defined functions conditions condition expression 1 expression 2 The following examples demonstrate how to u
10. user causes a constant phase shift between adjacent samples The overall phase change between the first and the last sample depends on the target clock rate frequency offset and the number of samples If this total phase change is not a full multiple of 2 the beginning and end phase not fit and spectral regrowth can occur The figure below shows a CW signal that is frequency shifted by 133 kHz The phase at the waveform start does not match the phase at the waveform end If this waveform were played continuously spectral regrowth would occur due to this phase step 1 1000 samples 1001 0 0 s 100 0 us This problem can be overcome by allowing the composer to adjust the frequency offset for phase matching between the waveform start and end Manual 56 The figure below shows the output signal when 2 5 deviation from the set frequency offset is allowed The resulting frequency offset is 130 kHz pp pom Ar eme cpi Expression Instead of a static frequency offset a mathematical expression may be used to define the frequency offset as a function of time Constants available in expressions PI The number pi CLK The target clock rate in Hz SOUT The number of samples output signal TOUT The signal time output signal ST The sample time C The speed of light Variables available in expression t Current time S Sample index dF
11. value gt Write new waveform file to disk Edit Level This menu item starts the level adjustment module and is only available when a waveform file wv is selected The module is used to change the waveform s RMS signal level based on a user definable signal section Edit Clip This menu item starts the waveform clipping module and is only available when a waveform file wv is selected The waveform clipping module is used to limit the peak to average ratio of a signal to a target value Edit Edit Markers This menu item starts the marker editor module and is only available when a waveform file wv is selected The marker editor is used to edit the marker traces graphically Edit To Polar This menu item starts the polar conversion module and is only available when a waveform file wv is selected This module converts a waveform into two separate waveforms that contain the phase and amplitude information Edit Composer This menu item starts the waveform composer module and is only available when a composer settings file cms is selected This module is used to generate complex multicarrier scenarios Edit Convert wv Files Manual 21 R amp S ARB Toolbox PLUS This menu item starts the waveform conversion module and is only available when a waveform file is selected This module converts waveforms the WinlIQSIM format to waveforms in the WinlQSIM2 format The conversion also
12. 12 35 Device SMW200A 101963 closed o 12 35 Checking file associations Monae By default both browsers show the local system Drive and directory items can be expanded by clicking the small arrows next to the items icons A right mouse click on an item opens a context menu with all available options for the item These options are described later in this document Additionally all available options can be accessed via the applications menu bar Options that do not fit the selected item are dimmed in the menu bar Each of the file browsers can be operated on the local file system or on the remote file system of any supported Rohde amp Schwarz instrument The remote file system browsers access the instrument SCPI mass memory commands Both browsers operate independently with one exception The same instrument cannot be used simultaneously in both browsers Drag and drop is supported between the two browsers The software supports the copying of files and of entire folder structures between local and instrument file systems and between two instrument file systems Drag and drop does not currently support multiple selections nor does it support operations between two local file systems P X A mmmnl Manual 10 R amp S ARB Toolbox PLUS eT
13. Clip waveform to a target peak to average ratio PAR Edit the marker traces of a waveform Split data into two separate waveforms containing the phase and the amplitude polar modulation Analyze and fix wrap around issues in waveform files Convert existing waveforms from R amp S9WinIQSIM or R amp S9AMIQ into current R amp S WinlQSIM2 waveforms and migrate the waveform licensing To simplify file handling the ARB Toolbox PLUS can display the directory structure of any local file system as well as file systems from R amp S instruments that are connected via remote control As well as many other functions the ARB Toolbox PLUS replaces the R amp S9IQ Wizard used to load IQ signal files ARB Toolbox PLUS is available for Windows Linux and Mac OS X operating systems R amp S ARB Toolbox PLUS Manual 2 2 1 2 2 2 3 Installation Prerequisites Installing ARB Toolbox PLUS requires approximately 16 Mbyte of free hard disk space Multiple temporary files are created in the systems temporary files directory The size of these files depend on the size of the ARB waveforms worked with The ARB Toolbox PLUS software uses the VISA runtime environment for communicating with instruments If VISA is not installed on your system only local file system operations will be functional VISA can be obtained from National Instruments Please see their website www ni com visa for downloads and for the terms and conditio
14. Delete This button clears the entire instrument list Both browser windows are set back to the local file system mode The same instrument can be added multiple times using different hardware interfaces For example an instrument can be added using a GPIB connection and a USB connection The file browsers can then be set for using the instrument with either of these interfaces R amp S ARB Toolbox PLUS Manual 6 Defining the Application Colors The application colors can be changed globally using the Application Colors dialog Access this dialog from the menu bar under Program Colors All color changes are applied immediately in all application windows It is therefore possible to open windows such as the waveform viewer and to observe the color change Preset Classic Brightness Contrast Background Foreground Traces General Selections Buttons 5 Panels Text E Panel Readings Entry Fields Preset The entire application can be set to one of the predefined color schemes or to a user defined color set 15 R amp S ARB Toolbox PLUS Save As This button saves the user color scheme to a file Load This button loads a color scheme from a file and replaces the current user color set Brightness The brightness control changes the brightness for the entire application Changing the brightness setting does not affect any of the user s color definition
15. Each of the two browsers provides a set of navigation controls that are located above the browser windows Refresh browser Instrument Configuration dialog Instrument File filter 2 w gt Last browser location Browser active indicator Instrument The instrument control sets the file browser operating mode to either the local file system or the instrument file system If an instrument becomes unavailable the associated browser is automatically switched back to local file system mode File filter The files shown in the file browser can be restricted to certain file types Browser active indicator The menu bar items are activated depending on the item selected in the file browser The active indicator displays which file browser is currently selected and determines the state of the menu bar entries Last browser location This field contains the recently visited locations for the associated file browser and can be used to go back to any of these locations Manual 11 R amp S ARB Toolbox PLUS 5 Configuring Instruments To use the file browsers with remotely connected instruments these instrument connections must first be configured This is done with the Instrument Configuration dialog by selecting Instrument Configure from the menu bar Device rssmw200a 101963 Scan Scan USB Scan GPIB Scan LAN Refresh Delete All Deve NN comet w dij S
16. MW200A 101963 TCPIP Manually Added VISA resource TCPIP rssmw2008101963 INSTR Firmware 3 1 19 8 3 20 261 02 beta User data var user RF1 100 0 kHz 6 0 GHz RF2 100 0 kHz 6 0 GHz 1 Size 1024 MSa BB1 Max clock 200 MHz BB1 Bandwidth 160 MHz BB2 Size 1024 MSa BB2 Max clock 200 MHz BB2 Bandwidth 160 MHz The section at the top of the dialog box contains controls for adding instruments by manually entering them or by scanning the local LAN USB or GPIB bus The GPIB scan is limited to the first GPIB card that is installed GPIBO The lower section of the dialog box contains the list of all known and previously configured instruments This list contains the instrument its remote control interface and its instrument properties as well as a checkbox that enables the instrument to be used with the file browsers Disabling an instrument in the list is useful if it is temporarily unavailable but should not be deleted from the list If an instrument is deselected and it is currently being used in one of the browser windows the associated browser window is set to the local file system mode Manual 12 R amp S ARB Toolbox PLUS Comment An optional comment can be added to each instrument in the list A double click on the instrument name opens the edit dialog for the comment field Comments can be used for explanatory purposes and they do not affect instrument communications Add Adding an instrument manually
17. R amp S ARB Toolbox PLUS V 3 2 Manual R amp S ARB Toolbox PLUS Table of Contents 1 Program 6 2 instalation cond en Dou CC UE csi Roni 7 21 Prerequisites iii cit iat inei Gier ouest e cua ie ce Cuenca ies 7 2 2 Supported Operating Systems eese essen 7 2 3 Supported Instruments 7 2 4 Installation Procedure on Windows eere 8 3 Command Line Options idis cota RAS 9 4 Getting Started 10 5 Configuring 12 6 Defining the Application Colors 15 7 USING 17 7 1 Local File System Context 18 FAA sii eee ed de i M 18 1 12 File ene Ree re es en eed 19 7 2 Remote File System Context 22 74 24 Folder Options etc ee d eo e av cod e P d 22 4 2 2 File
18. S C Drive 31 07 2015 12 32 DATA D Drive 31 07 2015 12 32 Data Volume Drive 31 03 2015 13 23 Local file system In local file system mode the browser shows four columns that contain the item name size and type along with the file modification date By default all entries are sorted by name in ascending order Folders are always listed first On a Microsoft Windows based system the root nodes are the available drives e g C or D Linux based systems use the file system root as the root node The icons used in the tree are the regular operating system icons Remote file system The remote file system contains three columns with the name size and item type By default all entries are sorted by name in ascending order Folders are listed first The root nodes depend on the instrument Microsoft Windows based instruments usually use D as the root node for user data Linux based instruments provide var user for user data If an additional hard drive is present the hdd node becomes available The icons are internally defined and depend on the item type A right mouse click on an item in one of the browser windows opens a context menu that contains useful options for this item The context menu actions therefore depend on the file system mode local or remote as well as on the selected item file folder type Manual 17 R amp S ARB Toolbox PLUS 7 1 Manual Local File System Context M
19. ation and timing Second waveform segment parameters can be changed by double clicking a segment in the editor TOO OE OD 0 0 s 10 0 ms The left side of the track editor contains two control fields for each track The larger field contains the track number and indicates if the track is evaluated during the creation of the final waveform A colored field symbolizes that this track is active and evaluated The activation state can be toggled with a left mouse click anywhere in the field The diamond in the smaller field on the right side is the track selection flag It marks tracks that are affected by edit operations In addition the segment selection works by combining the flag with the current cursor position Only segments from selected tracks can be marked using the cursor line These segments appear in a slightly brighter segment color Insert operations work on all selected tracks It is therefore possible to add the same waveform into multiple tracks at a common position in time Clicking into the smaller field using the left mouse button toggles the track selection state 45 14 1 1 Center Information Each waveform segment is symbolized by a colored area The position of this area corresponds to the location in the output waveform Depending on the zoom level three lines of textual information are provided within each segment 0 0 5 2 0 ms 4 0 ms 6 0 ms 8 0 ms 10 0 The
20. changes the waveform licensing to the current K options 7 2 Remote File System Context Menu Which menu items are available in the context menu depends on the currently selected entry The following section lists the available menu items for a selected folder or file entry in a file browser that is set to remote file system mode 7 2 4 Folder Options Set As Default Folder Sets the currently selected folder as the default folder This folder is always opened by default when this instrument is used with one of the browsers Create Folder Creates a new folder inside the currently selected folder The following characters are not allowed as part of the folder name amp The folder cannot be created if another entry with the same name already exists inside the selected folder Rename Renames the selected folder The following characters are not allowed as part of the folder name V amp The folder cannot be renamed if another entry with the same name already exists inside the selected folder Manual 22 R amp S ARB Toolbox PLUS eT Delete Deletes the selected folder and all its subfolders and files To prevent accidental deletions the user is asked if the folder and all its subfolders and items should be deleted 7 2 2 File Options Run This menu item starts the selected waveform wv in the instrument s ARB When used with a two path instrument the waveform is started in the first
21. e In and Fade Out Waveforms containing digital standard signals and originating from R amp S9WinlQSIMTM are usually intended for continuous playback The end of the waveform fits the beginning to avoid spectral regrowth caused by the wrap around If such a waveform is not repeated continuously but used as source for a waveform segment a small amount of fade in and fade out time may be required Fading the waveform changes the amplitude between zero and the full signal level within the given amount of time Waveform fading is indicated by a small arrow at the segment boundaries a Dose aget User MU SU TUER 0 0 5 2 0 ms 4 0 ms The example waveform below shows one GSM burst originating from R amp S WinlQSIM2 This burst was added to a track without defining a fade out time It can be seen that a glitch occurs at the end of the GSM waveform 4 6 ms This glitch is caused by the digital filter that was used when the waveform was generated R amp S ARB Toolbox PLUS eE eee e mr If this waveform is played continuously there will not be a signal glitch Instead the signal ramps up in such a way that the full signal level is available at the beginning of the waveform 14 1 6 Setting the End Position The end position of the output waveform is either determined automatically or set by the user These settings ca
22. e scale The tracks are provided as placeholders for waveform segments The track itself does not specify a frequency offset level or timing These settings are managed individually for each segment Each waveform segment is indicated by a colored section within the track The section length symbolizes the play time for this segment Signal Duration 72 544 ms 3627200 samples Source File Ci D 00 testfies composer test2 ka E dis coset Oe lU pr prar prp E E o rp PEE EF rp PHP EII 005 10 0 ms 20 0 ms 30 0 ms 40 0 ms 50 0 ms 60 0 ms 70 0 ms 80 0 ms s o Decore aisi Target iie R amp S ARB Toolbox PLUS 14 1 Manual The composer window is divided into four main areas The upper left area contains the controls required for adding or removing waveforms to or from tracks The upper right area contains the navigation controls The center area shows the graphical representation of the entire waveform composition or a zoomed portion of it It also provides access to the individual track settings The lower composer window area contains controls for various purposes such as cursor control track and file management and target file settings The Track Editor The track editor provides two major functions First it visualizes the entire waveform composition and provides information about segment settings such as the frequency offsets level attenu
23. eir respective holders The following abbreviations are used throughout this manual R amp S ARB Toolbox P S is abbreviated as ARB Toolbox PLUS R amp S ARB Toolbox PLUS Manual Program Features The ARB Toolbox PLUS is a powerful and easy to use set of tools for creating or manipulating waveforms for R amp S vector signal generators and baseband IQ modulation generators Use the Toolbox on a PC to gt gt Generate many analog modulated waveforms such as AM FM PM Pulse Multi Carrier and Noise Create R amp S ARB waveforms from custom data MATLAB mat files R amp S wav or R amp S ig tar files View the waveform content as power phase or frequency versus time Additionally see spectrum and I Q constellation or density plot Import I Q data from the most recent Rohde amp Schwarz spectrum analyzers Capture the data and save it as a waveform file Flexibly combine waveforms to form a single new waveform Combine data from up to 16 parallel tracks place waveform segments freely in time and frequency domain Convert data from the R amp S IQR Data Recorder to R amp S ARB waveform files Import data from the R amp S9PR100 portable radio transmissions monitor and convert the data streams to R amp S ARB waveform files Resample a waveform to change the target clock rate or sample count Rescale the peak power value Change the RMS signal level of a waveform Low pass filter waveform data
24. ent Analyze View This menu item starts the waveform viewer module and is only available when a waveform file wv is selected The viewer reads in all of the waveform data and displays and Q data the spectrum and a constellation diagram of a signal section or of the entire waveform A separate section in this manual describes the waveform viewer in greater detail Analyze Wrap Around This menu item starts the wrap around analysis module and is only available when a waveform file wv is selected Manual 19 R amp S ARB Toolbox PLUS File Create Signal Starts the signal creation module This module allows generation of many analog modulated waveforms such as AM FM PM Pulse Multi Carrier and Noise A separate section in this manual describes this module in greater detail Import Import Data This menu item is available for all files It starts the data import module This module converts binary or text data into a Rohde amp Schwarz waveform file Import MATLAB This menu item is only available for files that have the mat ending It starts the MATLAB data conversion module which displays the variables contained in a MATLAB mat file and allows the user to select one 1xN or Nx1 complex double array for conversion into a Rohde amp Schwarz waveform file Import RIQ This menu item is only available for files that have the riq ending It starts the RIQ data conversion module which conve
25. enu The selection of menu entries that is available in the context menu depends on the item that is currently selected in the file browser The following section lists the menu entries that are available for files and folders Folder Options The menu entries listed below are available when a folder has been selected in one of the file browsers This folder is shown in the recent locations control above the file browser The blue paper clip indicates which file browser is currently active Local lt Qu Most menu entries are also available in the application s main menu bar Set As Default Folder Sets the current folder as the default folder This folder is opened when the application starts up the next time This option is useful when working with local files that are always located in the same folder Create Folder Creates a new folder inside the currently selected folder The following characters are not allowed as part of the folder name amp The folder cannot be created if another entry with the same name already exists inside the selected folder Rename Renames the selected folder The following characters are not allowed as part of the folder name V amp The folder cannot be renamed if another entry with the same name already exists inside the selected folder Delete Deletes the selected folder if it is empty If the folder contains entries the user
26. es the wizard to the second page where the signal type can be specified in more detail Manual 24 R amp S ARB Toolbox PLUS The second page of the signal creation wizard sets all parameters required for the selected signal type As a result the content of this page depend on the signal type that has been set on the first page FM Sweep Settings Deviation Sweep Time Start Phase Stop Phase All entry fields on the settings panel provide tool tips with information about permissible value ranges for the entry field After editing all parameters clicking the Next gt gt button advances to the waveform preview panel The Previous lt lt button is used to go back to the first page of the signal creation wizard Settings made on this page are saved and restored if the page is activated again Manual 25 R amp S ARB Toolbox PLUS Manual The third page of the signal creation wizard shows a preview of the waveform that is generated No Scaling Samples Auto Scaling i Clock Rate Peak Vector ForceZero Peak RMS For large waveforms the preview panel limits the view to the beginning portion of the waveform Scaling The output waveform can be generated using two different level scaling modes The No Scaling selection leaves the signal amplitude untouched This could lead to low signal levels or clipping and it is only recommended for specific applications The Au
27. f CPU performance is insufficient for this the update rate is decreased to 200 ms u si 35 Manual R amp S ARB Toolbox PLUS 10 The Marker Editor Start the marker editor module via the context menu for a waveform file entry in the local file system browser The marker editor reads all the waveform data and provides a view of the data and the marker traces Additional controls in the lower panel area are used to modify the marker traces Navigation controls zooming view mode timeline play Please see the Waveform Viewer section in this manual Cursors The viewport provides three cursors The primary cursor is indicated by a single line and is located in the data area It marks the center point for all zoom operations The other two cursors are indicated by brackets and are located in the marker area They define the beginning and end point for all marker operations The Set buttons set the marker brackets to the current cursor position Manual 36 R amp S ARB Toolbox PLUS Manual Marker bracket controls Both marker brackets can also be set numerically using the controls located below the viewport window All marker operations are applied to the area defined by the two brackets including the boundaries Marker modification The marker modifications are applied between the two marker brackets including t
28. first line contains the file name of the waveform segment The file name does not contain the full path and it may be omitted if the segment section becomes too short The content of the second line is user selectable It provides one of the following information gt Used Samples This is the number of samples that are taken from the source waveform The waveform is truncated at the beginning or the end if the number of used samples is less than the total number of waveform samples gt First Sample This is the number of the first sample that is taken from the source waveform The waveform is truncated at the beginning if the first sample is greater than zero gt Frequency Offset This is the frequency offset that is set for the segment Setting a frequency offset shifts the signal away from the carrier frequency The frequency offset can be positive or negative If a frequency offset is set the segment gets marked with the dF symbol gt Attenuation This is the level attenuation set for the segment Setting a level offset reduces the signal level of this segment in the output waveform Positive values reduce the signal level If a level offset is set the segment gets marked with the dL symbol gt Play Time This is the segment s play time based on the source clock rate and the number of used samples R amp S ARB Toolbox PLUS gt Clock Rate This is the source clock rate of the waveform used in the segment The source cl
29. g PAR 7dB Bandwidth 5MHz PAR 8 2dB Soft Hard Soft Hard ARB The measurement results obtained from the above settings are summarized in the table below Original Clipped PAR 10 5 dB 8 3 dB ACLR 71 dB 69 dB EVM lt 0 3 2 42 96 As a rule of thumb the pre filter clipping PAR should be selected such that it is about 1 dB below the target PAR The pre filter clipping characteristic is usually set to a soft characteristic while the target clipping model uses a hard characteristic The basic idea behind this approach is that the first clipping stage reduces the PAR significantly As a side effect spectral regrowth occurs that is filtered with the low pass filter block The side effect of the filter is that the PAR increases again The small number of samples that remain above the target PAR are removed in the second clipping stage 43 14 The Waveform Composer Start the waveform composer module via the context menu for a folder entry or a composer settings file entry in the local file system browser The waveform composer provides powerful and versatile functionality for building complex multicarrier scenarios The main purpose of the composer module is to provide the user with a flexible way for arranging various waveforms in time or in frequency This is done by arranging waveform segments in up to 16 parallel tracks The final waveform is built by adding all waveform data from all tracks on one common tim
30. gth of the timeline symbolizes the play time of the entire waveform The green section marks the area of the waveform that is currently visible in the viewport When the mouse cursor is moved close to the timeline a red dot indicates the time that corresponds to the mouse position This time is also displayed numerically above the timeline A left mouse click adjusts the viewport center position to the selected time Manual 32 R amp S ARB Toolbox PLUS Manual Zooming The number of samples shown in the viewport window is controlled by two zoom buttons The zoom range is either defined in samples or time View mode The window size and the screen resolution limit the number of screen points in the time domain display This also limits the resolution at which level and time information is represented Particularly when a large signal section must be displayed one single screen point may contain the information from a large number of signal samples In this case view mode can control the information that is displayed Envelope The Envelope mode displays the and trace on a linear scale in the range between 1 0 and 1 0 The lower section contains the four digital marker traces M1 to M4 Depending on the zoom level each screen point may represent multiple signal samples If so the area between the minimum and maximum value is filled with a semi transparent trace color Log Mag Envelope The Log Mag Envelope
31. h the spectrum analyzer samples the signal Valid ranges must be looked up in the instrument manual and they depend on the instrument its options and the settings Samples Time The capturing process can be configured to either record a fixed number of samples or to record for a fixed period of time RBW Sets the resolution bandwidth for the capturing process Valid ranges must be looked up in the instrument manual They depend on the instrument and its options Trigger Source The default trigger source is immediate which starts the capturing without waiting for a trigger event Alternatively the IF Power and External trigger modes are available if the instrument supports this setting Trigger Slope This setting defines whether the trigger occurs at the rising or falling signal slope It is valid for the External and IF Power trigger modes IF Power This setting defines the trigger threshold in dBm when the trigger source is set to IF Power Pretrigger Samples The number of pretrigger samples defines the sample count that is captured before the trigger event occurs Manual 65 The second page of the capturing module controls the capturing process itself Text messages inform the user about the current capturing state Capturing IQ Trace from Analyzer Opening instrument TCPIP FSQ26 200837 INSTR Configuring instrument Center Frequency 1 0 GHz Resolution Bandwidth 10 0 MHz 10 0 MHz 5000000 35 dB 10 dB
32. he boundaries The modification controls define the modification type and the affected marker traces The Apply button performs the change immediately The marker change is executed immediately and without confirmation No undo functionality is provided because this requires the buffering of an extremely large amount of data Instead all changes are applied to temporary waveform data The final waveform is built from this data when the Run button is pressed If unwanted marker changes have been made it is sufficient to close the panel and restart Run The Run button builds a new waveform from the data and the modified marker data Close The button closes the dialog If changes have been made the user is queried if the modified data should be saved prior to closing the dialog Once the panel is closed all marker changes are lost R amp S ARB Toolbox PLUS 11 The Level Scaling Module Start the level scaling module via the context menu for a waveform file entry in the local file system browser It reads the entire waveform data and provides a view of the data versus time Additional controls in the lower section of the panel define the signal portion that is used for calculating the RMS signal level 0 00 dB 10 29 dB 0 00 dB 12 24 dB Navigation controls zooming view mode timeline play Please see the Waveform Viewer section in this manual Cursors The viewport provides three cursors The prima
33. inimum and maximum permissible ARB clock rates Peak Vector The indicator field is read only It shows the peak magnitude of the samples that are evaluated in the preview window To avoid signal clipping the number must not exceed 1 0 If auto scaling has been selected the application will first create the signal and then scale it to a peak vector of exactly 1 0 Peak RMS The indicator field is read only It shows the relation between the peak power and the RMS power of the evaluated waveform section The ratio is expressed in dB If the preview shows satisfactory results use the Next gt gt button to advance the signal creation wizard to the waveform file settings page This page sets the output file name provides optional comment information and builds the output file Manual 27 R amp S ARB Toolbox PLUS 8 1 Waveform Types 8 1 1 Function The function setting creates sine square triangular or sawtooth signals These signals are equally build for and Q but the amplitude and level offset can be set independently Additionally the Q signal may be phase shifted to the signal Function Settings Signal Frequency Amplitude 2nd Frequency Duration Custom TUA Oversampling 100 Phase Shift Setting a second frequency creates a frequency sweep The result is a waveform that starts with the signal frequency and ends with the second frequency The duration defines the amount of time in which
34. is asked if the folder and all its entries should be removed 18 R amp S ARB Toolbox PLUS u File Create Signal Starts the signal creation module This module allows generation of many analog modulated waveforms such as AM FM PM Pulse Multi Carrier and Noise A separate section in this manual describes this module in greater detail Import Import From Analyzer Starts the import module for the spectrum analyzer data This module connects to a spectrum analyzer captures data and saves this data as a waveform file in the current folder A separate section in this manual describes this module in greater detail Edit Composer This action starts the waveform composer module This module is used to combine multiple waveforms to form a single new waveform A separate section in this manual describes this module in greater detail Edit Convert Files This menu item starts the waveform conversion This module converts waveforms in the WinIQSIM format to waveforms in the WinIQSIM2 format The conversion also changes the waveform licensing to the current K options 7 1 2 File Options Analyze Waveform Info This menu item is only available when a waveform file wv is selected The waveform information module evaluates information from the waveform file such as the clock rate number of samples crest factor playtime and comm
35. mode displays the logarithmic signal amplitude on a 100 dB scale The lower section contains the four digital marker traces M1 to M4 When one Screen point represents multiple signal samples the area between the minimum and maximum value is filled with a semi transparent trace color Log Mag Average In contrast to the Log Mag Envelope mode the area between the minimum and maximum value is not filled in this mode Instead the average value is displayed when multiple samples are represented by one screen point Lin Mag Average The Lin Mag Average mode is similar to the Log Mag Average mode but it uses a linear scale between zero and one 33 R amp S ARB Toolbox PLUS SSS SS url Spectrum The spectrum panel shows the FFT of the signal portion that is visible in the viewport The FFT scale has a range of 150 dB and it is sufficient to cover the 16 bit resolution provided by the vector signal generator s internal ARB 96 dB The frequency scale ranges from 1 2 to 1 2 of the waveform sample rate 30 0 MHz 30 0 MHz The FFT algorithm processes the waveform data in sections of 512 points Each section is multiplied with a raised cosine window Adjacent sections overlap each other by half the section length After all FFT windows are calculated the average of all results is created and displayed Care must be taken when short signal portions are to be evaluated In this case the windowing function weights the beginni
36. n be entered numerically in the output waveform dialog that is described later in this manual An alternative method is to set the end point to the current cursor position This can be done by invoking the context menu in the track editor and selecting Set End to Cursor 14 2 Zooming and Navigation The track editor provides a primary cursor line that serves as the center point for all zoom operations Placing the cursor line and turning the mouse s scroll button forward zooms in at the current cursor position Turning the scroll button backward zooms out Zooming is also possible using the three navigation control buttons The lens and buttons zoom in and out at the cursor position The lens symbol with the bracket sets the view area to fit the entire waveform composition The two arrow buttons position the view to the beginning or end of the entire waveform composition Manual 51 R amp S ARB Toolbox PLUS 14 3 14 3 1 14 3 2 14 3 3 Manual Adding and Removing Segments Adding or removing content is the track editor s main task The waveform composer provides two operations for adding content and two operations for removing content All operations on waveform segments are non destructive and saved in a database Therefore each step can be undone using the Undo button Cursor Control Generally all edit operations are related to the current cursor position Inserting and overwriting content starts exactl
37. ng and end of the waveform less than the center portion Waterfall 30 0 MHz 30 0 MHz The waterfall panel shows the spectrum of a signal portion as a function of time Each line in the waterfall diagram represents one FFT with 512 points The waterfall diagram uses a color scale to represent a dynamic range of 150 dB Manual 34 R amp S ARB Toolbox PLUS constellation plot The constellation plot operates in two different modes depending on the number of samples visible in the viewport When the number of samples is relatively low the panel shows the samples as dots pee The display covers the range between 1 0 and 1 0 for and Q The outer circle marks the vector length of 1 0 Samples located outside of this circle are subject to clipping when the waveform is played back in the ARB The inner circle marks the vector length 1 sqrt 2 Samples located on this circle generate an output power of 3 dB below the maximum If a large number of samples are to be evaluated the display mode changes from a single sample display to a density plot display In this operating mode the display is divided into a grid of 50 by 50 points and the number of samples that fall within each point is counted Finally the sample counts are translated to Play stop The play button starts the graphical waveform playback In this mode the waveform section is shifted in time by one half of a display section every 100 ms I
38. ns Supported Operating Systems ARB Toolbox PLUS is available for the following operating systems gt Windows XP Windows VISTA and Windows 7 as a 32 bit application gt Linux gt Mac OS X Snow Leopard or later Supported Instruments The following instruments are fully supported for use with ARB Toolbox PLUS gt R amp S9SMW200A R amp S9SGT100A gt R amp S AFQ100A R amp S AFQ100B gt R amp S9SMBV100A gt R amp S9 SMU200A R amp S9SMJ100A R amp S9SMATE200A The following file formats from Rohde amp Schwarz equipment is supported gt R amp SOIQR wvh and file format gt R amp S9PR100 file format gt R amp S file format gt R amp S iq tar file format Additionally the spectrum analyzer import module supports the data imports from the most recent Rohde amp Schwarz spectrum analyzers 2 4 Installation Procedure on Windows ARB Toolbox PLUS is installed by executing the self extracting installer software The installer will guide you through the entire installation process J R amp S ARB Toolbox Plus Setup Welcome to the R amp S ARB Toolbox Plus Setup Wizard The Setup Wizard allows you to change the way R amp S ARB Toolbox Plus features are installed on your computer or to remove it from your computer Click Next to continue or Cancel to exit the Setup Wizard amp SCHWARZ During the installation process the system verifies the presence of the VISA runtime
39. ock rate may differ from the output waveform s clock rate In this case resampling is required and the segment is marked with an R symbol gt Start Sample This is the start sample of the segment in the output waveform The start sample is related to the output waveform s clock rate gt Start Time This is the start time of the segment in the output waveform The third row contains icons that indicate certain segment states The following icons are used gt R Resampling is required for the segment This indicates that the source clock rate differs from the output clock rate dF The segment is frequency shifted dF The segment is frequency shifted Additionally the limit set for automatic adjustment of the frequency shift cannot be met dL The segment is attenuated 14 1 2 Offline Files Each segment references a waveform file containing the and marker data that is added to the output waveform during the building process The waveform file is specified using a path relative to the composer settings file If the waveform file becomes unavailable the corresponding segment is highlighted in a different color Waveform scenarios that contain unavailable segments cannot be built 0 0 s 2 0 ms 4 0 ms 6 0 ms 8 0 ms 10 0 Manual 47 14 1 3 Wrapped Around Segments The beginning and end points of the target waveform are marked by thin lines The beginning
40. ontains the absolute path but saves a path relative to the composer settings file It is therefore possible to put the settings file together with the waveform files into one folder structure and then copy everything to a different location 14 4 1 Attenuation Settings Static The attenuation reduces the signal level of the segment in the output waveform A positive value of 6 dB for example reduces the RF signal level by 6 dB and the baseband level to 50 96 0 0 5 500 0 us 1 0 ms 1 5 ms 2 0 ms 2 5 ms 3 0 ms Expression Instead of a static level offset a mathematical expression may be used to define the attenuation as a function of time Reference The reference for leveling a segment can be either the RMS signal level or the peak signal level In general modulated telecommunication signals are leveled using the RMS value whereas pulsed signals often use the peak value R amp S ARB Toolbox PLUS 14 4 2 Frequency Settings Static Offset The frequency offset shifts the signal in frequency You can add the same waveform at the same position to multiple tracks and then apply individual frequency offsets The result is a multicarrier scenario shift and signal bandwidth A minimum target clock rate of twice the signal bandwidth o It must be ensured that the target clock rate is large enough for the desired frequency plus the frequency offset should be used Allow Deviation The frequency offset entered by the
41. ontent As a result it leaves the tracks synchronized 52 R amp S ARB Toolbox PLUS eT 14 3 4 Extract Removes the selected segments from all marked tracks and closes the gap for the removed segments by shifting all content following the cursor line The segments that will be removed are determined by the track selectors diamonds and the cursor position Please note that the extract operation shifts track content individually depending on the size of the removed segments Consequently the timing relationship of the tracks may become unsynchronized after an extract operation 14 3 5 Lift Lifts the selected segments from all marked tracks and does not close the gap left by the removed segments The segments being removed are determined by the track selectors diamonds and the cursor position The lift operation does not shift content Therefore it leaves the tracks synchronized Manual 53 14 4 Segment Settings Double clicking a segment in the track editor opens the Segment Settings dialog This dialog contains all parameters that affect the current segment and its position in the output waveform Each segment uses its own individual data set All changes are added to a database and they can be undone using the Undo button in the track editor Segment Settings Track 2 38 mne o egocosw me Source File This is the name of the waveform file associated with the segment The file name also c
42. rackets Run The Run button builds a new waveform with the modified Peak and Peak RMS levels Close This button closes the dialog Manual 39 R amp S ARB Toolbox PLUS Manual Start the wrap around analysis module via the context menu for a waveform file entry in the local file system browser It reads the head and tail section of the waveform and displays these sections side by side Wrap around conditions occur if the end of the waveform does not match the beginning and the waveform is played continuously In this case a broad spectrum is created when the wrap around occurs This module allows the user to smooth the head and tail section For this purpose a cutoff frequency and a correction range in samples can be provided The smoothing algorithm creates a filtered waveform for the given sample range Head and Tail Sample The head and tail sample position mark the beginning and the end of the waveform The waveform can be truncated by changing these numbers Show Data The FFT window either displays the spectrum of the original uncorrected or the filtered corrected signal 40 Cutoff Frequency Sets the cutoff frequency of the low pass filter used for the transition region The fading between the original and the filtered waveform is implemented by using a raised cosine window Correction Range This setting defines the number of samples that are affected by the smoothing operation The fading between
43. rted for the very first time the workspace is divided into a left and a right file browser that shows content from the local file system The workspace area at the bottom of the panel displays program messages warnings and errors These messages are for informational purposes only File Analyze Import Edit Instrument Program Help Browsers Tasks Local v Q Local D E Date Modified i i Date Modified b amp osc 31 07 2015 12 32 31 07 2015 12 32 b DATA D 31 07 2015 12 32 310720151232 Data Volume 2 31 03 2015 13 23 Data Volume 31 03 2015 13 23 SATURN 24 07 2013 10 05 D SATURN 24 07 2013 10 05 CCase M 31 07 2015 07 15 D CCase M 31 07 2015 07 15 b SATURN SECTION 20 07 2015 09 22 SATURN SECTION 20 07 2015 09 22 b SATURN USER 0 11 06 2015 16 05 b SATURN USER 0 11 06 2015 16 05 3 SATURN USER P 07 07 2015 07 26 G SATURN USER P 07 07 2015 07 26 SATURN GROUP S 22 10 2014 12 39 SATURN GROUP 5 22 10 2014 12 39 G SATURN SECTION U 03 07 2015 07 45 b SATURN SECTION U 03 07 2015 07 45 b SYSVOL X 28 01 2015 22 38 b SYSVOL X 28 01 2015 22 38 b CCase 31 07 2015 07 15 CCase Y 31 07 2015 07 15 12 35 Local host name is MU720118 12 35 Loading program settings 12 35 Opening VISA device TCPIP rssmw200a101963 INSTR 6
44. rts data streams that have been captured by the R amp S9PR100 and saved on its memory card Import WAV This menu item is only available for files that have the wav ending It starts the WAV file conversion module which converts data that has been saved by the R amp S EM100 Control software Import This menu item is only available for files that have the wvh ending It starts the R amp SSIQR conversion module The matching wvd file is expected at the same location as the file Edit Resample This menu item starts the resampling module and is only available if a waveform wv file is selected This module is used to resample a signal to a given clock rate or sample count The resampling sequence contains the following steps gt Read waveform data from file gt Resample to target clock rate or sample count gt Rescale to the same peak power value Write new waveform file to disk Manual 20 R amp S ARB Toolbox PLUS The resampling algorithm uses a lowpass filter with a cutoff frequency of 0 45 times the sample rate Edit Filter This menu item starts the filter module and is only available when a waveform file wv is selected This module provides a configurable lowpass filter that can be used for limiting the signal bandwidth The filter sequence contains the following steps gt Read waveform data from file gt Filter waveform data gt Rescale to the same peak power
45. ry cursor is indicated by a single line It marks the center point for all zoom operations The other two cursors are indicated by brackets They define the beginning and end point for the RMS level evaluation period The Set buttons set the brackets to the current cursor position Manual 38 R amp S ARB Toolbox PLUS I 9r Numeric bracket controls Both brackets can also be set numerically by using the controls below the cursor navigation buttons Peak and Peak RMS display This section shows the Peak and Peak RMS values based on different sources Tag This information is based on a tag stored in the waveform file When this information is present the signal generator will use it for leveling If the tag is missing the signal generator evaluates the file content and levels automatically Entire Data This information is calculated from all samples after the file has been read in For most waveform files these values are equal to the ones contained in the level tag Target levels These controls contain the Peak and Peak RMS levels as they will be written to the final waveform file Both values are initialized with the values determined when the waveform was initially read in The Update button recalculates the Peak RMS level according to the section defined by the two b
46. s Contrast The contrast control changes the contrast setting for the entire application Increasing the contrast reduces the brightness of background colors and increases the brightness of foreground colors Changing the contrast does not affect any of the user s color definitions Color tiles The small colored tiles represent the color of the individual elements One of these tiles can be selected for editing using the HSV color controls HSV color control The application uses the HSV color model for defining the application colors This color model uses hue saturation and value instead of red green and blue components Hue represents the angle on the color wheel between 0 and 360 This value is meaningless for non chromatic colors e g gray The saturation is set in the range between 0 and 255 it defines how strong the color is Grayish colors have very low saturation whereas strong colors use high saturation values The value defines the lightness this parameter is also set between 0 and 255 The brighter the color is the higher the value Manual 16 R amp S ARB Toolbox PLUS 7 Using the Browsers Both browsers can be operated in either the local file system mode or the remote file System mode The operating mode is set using the control at the top of each browser It always shows the Local entry as well as all available instruments a v i Size Date Modified amp O
47. s indicated by a small arrow at the beginning or at the end of the segment The arrow also symbolizes the direction of the level change Time The period of time used for the level change between zero and full level Leaving the time at zero disables fading Shape The shape defines the profile that is used for changing the amplitude between zero and the full level ANTI m ii p he olan TT R amp S ARB Toolbox PLUS 14 5 Target Waveform Settings The target waveform settings specify all parameters related to the waveform that is generated by the composer engine Besides the target file the length and clock rate of the waveform can be specified e Target Waveform Settings fea Target C _D 00_testfiles composer test2 compositing E Create Multi Segment Wv Longest Track Wins Longest Segment Wins Length User Defined Samples Time 72 544 ms Highest of All Segments Clock User Defined SOMHz lt Accept 36 Close Target File The target file contains the absolute path and the file name of the output file The path is internally saved relative to the composer settings file This makes it possible to copy the settings file together with all waveform files to a different location When this dialog is invoked the original absolute path gets restored Create Multi Segment Wv The composer can create a multi segment wa
48. se mathematical expression to generate various waveforms ARB toolbox allows to control the signal amplitude and frequency by two independent equations If the signal amplitude remains constant the value 1 needs to be added in the expression field Linear frequency sweep from 100 kHz to 100 kHz AM 100 200e3 Freq dy T 3 Non linear chirp AM 0 5 100 Freq 1 2 t _T 0 5 20e3 14 2 t _T sqrt 1 001 1 42 t T 2 Pulse with exponential rising and falling edge AM t T 2 1l exp 20 t T exp 20 t T 2 T Phase 0 Manual 30 Gaussian pulse AM exp 0 5 t _T 2 _T 8 2 Phase 0 R amp S ARB Toolbox PLUS 9 The Waveform Viewer Start the waveform viewer module via the context menu for a waveform file entry in the local file system browser The viewer reads the entire waveform data and provides three display sections on one single panel The time domain view the spectrum and the constellation Navigation controls The number of signal samples that are displayed in the viewport can be set between 50 and 100 000 In most cases the viewport window is used to display only a section of the entire waveform The navigation controls on the left side above the viewport window step forward or backward to the beginning or end of the waveform Timeline The timeline is located above the viewport window It provides multiple functions The len
49. the original and the filtered waveform is implemented by using a raised cosine window R amp S ARB Toolbox PLUS 13 The Clipping Module Start the clipping module via the context menu for a waveform file entry in the local file system browser It reads the entire waveform and displays the CCDF as well as the spectrum of the signal before and after a clipping operation The clipping settings are divided into three major sections These sections are gt Pre filter clipping gt Low pass filter gt Target clipping The target clipping value sets the peak to average PAR ratio of the final waveform The slider below the PAR setting controls the smoothing factor of the clipping operation Hard clipping means that all samples that exceed the maximum amplitude are clipped to this maximum amplitude Soft clipping uses a weighting function Rapp model to create output samples from input samples The pre filter clipping and the low pass filter can be enabled as an option The combination of these settings allow to generate waveforms that exhibit a good compromise of error vector magnitude EVM and adjacent channel power ACP in telecommunication standards Manual 42 R amp S ARB Toolbox PLUS Manual Settings Example gt 3 GPP FDD waveform Rel 9 FWD link R amp S WinlIQSIM2 default gt Target PAR should be 8 2 dB gt Software settings Enable filter and pre filter dipping Filter Target waveform dippin
50. to Scaling mode scales the waveform so that it perfectly fits the 16 bit dynamic range of the instrument s ARB No clipping is performed when auto scaling is selected 26 R amp S ARB Toolbox PLUS Force Zero Peak RMS ARB Toolbox PLUS calculates the peak power and RMS power for the entire waveform and saves this information as part of the waveform file The generator uses these values to ensure correct leveling and to inform the user about over range conditions The Peak RMS ratio defines the difference between the power level that is set by the user and the peak power generated by the instrument For example if the Peak RMS ratio is 10 dB and the user sets an average power level of 15 dBm signal peaks of 25 dBm will occur For most signals it is a good idea for the user to control the waveform s RMS power For some signals such as pulses the RMS signal level is of little interest In this case the user controls the top pulse power and forces the Peak RMS value to be zero Samples The indicator field is read only It displays the number of samples that the final waveform contains An exclamation mark warns the user if the sample count falls below 512 samples In this case the waveform length might violate the minimum required ARB file size Clock Rate The indicator field is read only It shows the final waveform s clock rate The clock rate is selected by the application and it fits into the range that is established by the m
51. tting the End 51 14 2 ZOOMING and 51 14 3 Adding and Removing Segments eese eene nnn 52 1431 Cursor Control eee ec te eee 52 14 3 2 es ee ae eet 52 1433 ODE 52 14 3 4 Extract E 53 ILC MEE C E 53 14 4 Segment 5 54 14 4 1 Attenuation Settings enne tnnt inneren nennt nas 55 14 4 2 Frequency 56 1443 E 58 14 4 4 Position In Output incer 58 14 4 5 Flags ede tiv edv e cod ede itn eee edes 59 14 4 6 Fade In and 60 14 5 Target Waveform Settings 61 14 6 Building the Target 63 15 Capturing with the Spectrum Analyzer 64 Manual 4 2015 Rohde amp Schwarz GmbH 8 Co KG 81671 Munich Germany Printed in Germany Subject to change Data without tolerance limits is not binding R amp S is a registered trademark of Rohde amp Schwarz GmbH amp Co KG Trade names are trademarks of th
52. ulti process The build process can be started at any time and repeated multiple times Existing target waveforms are replaced by newer ones 63 15 Capturing with the Spectrum Analyzer The spectrum analyzer capturing module records data using a spectrum analyzer and saves this data as a waveform file The module can be invoked via the context menu for a folder entry in one of the local file system browsers Before using the module you must configure the spectrum analyzer for use with ARB Toolbox PLUS This is done the Instrument Configuration panel Menu Instrument Configure The spectrum analyzer is added in the same way as the signal generators are added VISA resource TCPIP FSQ26 200837 INSTR Firmware 4 65 User data D Once a spectrum analyzer is added to the instrument list it can be selected as a capturing source in the capturing module Please see the instruments operating manual for valid settings The first page of the capturing module provides all of the settings that define the capturing process These settings are described below R amp S ARB Toolbox PLUS Input The default signal input is the RF port Alternatively the analog or digital inputs can be selected Depending on the spectrum analyzer these options may not be available and an error is generated during the capturing process Sample Rate The sample rate sets the rate at whic
53. veform file instead of a regular waveform if only one single track is used Multi segment waveform files contain individual waveform segments that can be selected for single or repeated playback A detailed description on multi segment waveforms can be found in the instruments user manual Manual 61 R amp S ARB Toolbox PLUS I 9r Length The length of the target waveform can be determined automatically or set by the user All waveform data beyond the end of the waveform gets truncated or is wrapped around to the beginning Longest Track Wins The length of the longest track determines the overall waveform length This is the default setting and it is useful in most applications The length is updated with each editing operation Longest Segment Wins The longest segment in any of the tracks defines the overall waveform length This setting may be useful when multiple segments are added at the same point in time The length is updated with each editing operation User Defined In this mode the length is fixed and set in samples or time The length does not change with editing operations Clock The target clock rate can be determined automatically or set to a fixed value Automatic mode is the default setting here This mode selects the highest of all segment clock rates
54. y at the cursor position The sample counting is zero based and starts at index 0 for the first sample Pressing the Control key along with the left mouse button snaps the cursor line to the closest segment border of all marked tracks At the beginning of the composition the cursor snaps to sample zero At the border between two adjacent segments the cursor snaps to the first sample of the second segment At the end of the composition the cursor snaps to the sample following the last segment Only marked tracks are affected by edit operations Therefore the track selection indicators the little diamonds on the left side must be set before adding or removing content Insert Inserts the selected waveform at the cursor position in all marked tracks The insert operation shifts all content following the insert position by exactly the space that the inserted signal requires When the insert mark is placed within a segment the segment is split and the remaining part is shifted beyond the newly inserted segment Please note that the insert operation shifts track content by the size of the newly inserted segment The timing relationship of the tracks may therefore become unsynchronized Overwrite Overwrites the track content of all marked tracks with the selected waveform Entirely overwritten segments are removed from the scenario Tracks that get partially overwritten are automatically truncated The overwrite operation does not shift c
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