R&S WinIQSIM2 Software Manual - Rohde & Schwarz

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R&S ® WinIQSIM2 Graphical User Interface Baseband Block ● By "Cut Off Frequency Shift" = 0, the -3 dB point is at the frequency determined by the half of the selected "Sample Rate". User filter The user filter file must have extention *.vaf and can be created with the R&S filter wizard. The filter wizard (filtwiz) is a tool from Rohde & Schwarz designed for creating filter files that can be imported on a R&S WinIQSIM2. Its main purpose is the conversion of userdefined finite impulse response (FIR) filters into the filter format (*.vaf). Beyond this filtwiz provides designs for standard filters, e.g. Root Raised Cosine, Gaussian. The program was developed on a 32-bit Microsoft Windows platform under MATLAB. For more information, refer to the description "Introduction to "filtwiz" Filter Editor" on the Rohde&Schwarz Internet page. 5.10.2.4 Conflicting Settings - Custom Digital Mod Having selected a modulation procedure, not every combination is possible when selecting the settings for the modulation parameters "Symbol Rate" and "Coding". These restrictions inevitably give rise to conflicting settings if a parameter is changed and leads to a prohibited combination. A conflicting setting is indicated by a message on the Info line in the display. The R&S WinIQSIM2 displays the setting entered by the user, but the modulation signal actually generated does not correspond to this display. A conflict of settings can be triggered if the user changes a parameter inappropriately. The message disappears as soon as a conflict-free setting is entered. 5.10.2.5 Custom Digital Mod User Interface The menu for setting digital modulation can be opened either in the "Baseband" block or in the menu tree under "Baseband". The "Custom Digital Modulation" menu enables direct selection of the data source, standard, symbol rate, coding, modulation type and filter. All other settings are entered in submenus which are called via "More" buttons. The upper part of the menu is used for powering up digital modulation as well as for calling the default settings and user-defined standards. The "Generate Waveform File" opens the submenu for storing the current signal in a waveform file. Software Manual 1008.0858.42 ─ 10 62
R&S ® WinIQSIM2 Graphical User Interface Baseband Block The data source is selected and set in the "Data Source" section. The "List Management" button opens a submenu for calling the data editor and the file manager. The middle part of the menu is used for selecting the standard, the symbol rate and the coding. The modulation type is set in the "Modulation" section. The "More" button opens a submenu that displays the mapping for the selected modulation. The filter is set in the "Filter" section. The "More" button opens a submenu where the filter characteristic of the selected filter is displayed. The buttons in the lower part of the menu open submenus for power ramping and for configuring markers. In each case the current setting is displayed next to the button. Software Manual 1008.0858.42 ─ 10 63
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R&S WinIQSIM2 Software Manual - Rohde & Schwarz

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