R&S®SMW-K551 Slow IQ
Contents
1. The latest versions are available for download from the Rohde amp Schwarz website at http www rohde schwarz com appnotes Conventions Used in the Documentation Typographical Conventions The following text markers are used throughout this documentation Convention Description Graphical user interface ele All names of graphical user interface elements on the screen such as ments dialog boxes menus options buttons and softkeys are enclosed by quotation marks KEYS Key names are written in capital letters File names commands File names commands coding samples and screen output are distin program code guished by their font 1 3 2 1 3 3 Conventions Used in the Documentation Convention Description Input Input to be entered by the user is displayed in italics Links Links that you can click are displayed in blue font References References to other parts of the documentation are enclosed by quota tion marks Conventions for Procedure Descriptions When describing how to operate the instrument several alternative methods may be available to perform the same task In this case the procedure using the touchscreen is described Any elements that can be activated by touching can also be clicked using an additionally connected mouse The alternative procedure using the keys on the instrument or the on screen keyboard is only described if it deviates from the standard op2. signal oss ERAN igital Data a ese iene DUT format E gt R amp S EX lQ BOX 2 e o O norio IS IA lt Digital 1 Q signal LAN D a Request __ Stream sor gt Digital Data DUT format DIG IQ IN OUT Fig 5 1 Simplified test setup for 2x8 MIMO tests with slow IQ signals Clock the clock signal of the DUT must be provided to both R amp S EX IQ Box 2 Configure the R amp S SMW to generate the required signal For example an LTE signal in a 1x2x8 MIMO configuration and enable Signal Outputs gt Digital Only Multiplexed 3 If Fading simulation is required a select Fading gt General gt Virtual RF 2 14 GHz b select Fading gt Standard gt LTE MIMO gt ETU 70Hz Medium c select Fading gt State gt On O gt OOO Standard ETU 70Hz Medium Configuration StandardFine Delay Fading Clockrate mome gt Signal Dedicated To Baseband Output 7 Vuai 2 140 000 000 00 cre Ignore RF Changes lt 5 0 On Frequency Hopping Mode on pa 4 Configure the DUT if required and sets its clock rate 5 Configure the digital interface module R amp S EX IQ Box as described in To config ure the R amp S EX IQ Box on page 25 The generated signal is processed in a way that each of the four multiplexed stream will have a sampling rate of 250 KHz 6 Remote Control Commands SCONfiguration OUTPut MODE lt Mode gt Defines w
3. Caa Breakout Board es DUT format Fig 3 4 Simplified test setup for MIMO tests with external reference signal not all required connections are shown Example How to find out the max ClockRatepgs ex 10 80x for that an additional ref erence frequency is not required The clock rate of the R amp S EX IQ Box is calculated by the formula ClockRateggs ex 10 80x lt SamplingRatestream MuxStreams e Assume that the R amp S SMW generates one digital stream with Samplin gRatestream 100 MHz If the DUT requires a signal with Clock Rate lt 100 MHz no additional reference frequency is required e If the R amp S SMW generates two streams with SamplingRategteam 100 MHz each an additional reference frequency is required for Clock Rate 200 MHz 4 Slow IQ Related Settings Generation of slow IQ signals is a feature that requires the additional option R amp S SMW K551 To access the System Configuration settings 1 Inthe task bar R amp S SMW select the System Configuration gt System Configura tion The Fading Baseband Configuration settings are displayed 2 Select Signal Outputs gt Digital Only Multiplexed 3 Configure for example an 1x2x8 MIMO scenario a Select Mode gt Advanced b Select Entities 1 Basebands 2 and Streams 8 c Select BB Source Config gt Coupled Sources 4 Select Apply With the selected configuration the instrument generates digital signals only the analog outpu
4. dig ital 1 Q interfaces e In Digital Only Multiplexed mode the multiplexed streams are mapped to the digital I Q interfaces BBMM 1 2 the mapping is fixed See user manual R amp S SMW K551 Generation of Digital Slow IQ Signals Remote command SCONfiguration OUTPut MODE on page 29 l Q Digital Outputs Available are the standard settings and the following parameters dedicated to the slow IQ signal generation Slow IQ State I Q Digital Outputs If Digital Only or Digital Only Multiplexed signals are generated this parameter shows whether a Sample Clock Request is enabled in the connected R amp S EX IQ Box All digital outputs must work in tha same mode i e with Slow IQ On or Slow IQ Off A warning symbol indicates a violation of this rule Level Channel Stream I Q Digital Outputs Displays the resulting signal level of each multiplexed stream 5 How To Generate Signals with Reduced speed for FPGA Tests The following is a list of some important settings Not all required settings are consid ered For detailed information on the required steps refer to the documents listed in chap ter 7 Further Information on page 30 How To Generate a 1x2x4 MIMO Digital Signal for FPGA Tests with Slow IQ Sig nals The test setup and the configuration required to generate signals with reduced speed undergoes a group of main steps The explanation of the configuration principle is based on one particu
5. discussed in this manual are the same as in the base unit and are described in the R amp S SMW user manual The latest version is available for download at the product homepage Installation You can find detailed installation instructions in the delivery of the option or in the R amp S SMW Service Manual 2 1 Accessing the Slow IQ Settings To open the dialog with the required settings 1 In the task bar R amp S SMW select the System Configuration gt System Configura tion A dialog box opens that displays the Fading Baseband Configuration settings 2 Select Signal Outputs gt Digital Only Digital Only Multiplexed 3 Select Ok The signal generation is not started immediately To start signal generation with the default settings select State gt On Scope 2 2 Scope Tasks in manual or remote operation that are also performed in the base unit in the same way are not described here In particular this includes e Managing settings and data lists i e storing and loading settings creating and accessing data lists accessing files in a particular directory etc e Information on regular trigger marker and clock signals as well as filter settings if appropriate e General instrument configuration such as checking the system configuration con figuring networks and remote operation e Using the common status registers For a description of such tasks see the R amp S SMW user manual Required Options
6. usually a R amp S EX IQ Box The analog RF and l Q outputs are disabled Depending on the further processing device the R amp S SMW may use a reduced data rate See also chapter 3 3 Transmission Modes on page 13 User Manual 1176 9564 02 02 12 Transmission Modes Simplified test setup for testing slow IQ signals The figure 3 1 shows an example of a simple test setup for SISO tests i Request Ej Stream A p gt a lt enn gt Data I A e SOs EN Ey gt lt a oe Q O am else fem Digital Data LAN USB DUT format Fig 3 1 Simplified test setup for SISO tests with slow IQ signals IN OUT Pe go n a es O x IG DUT device under test e g a FPGA based hardware emulator The R amp S SMW in this setup generates a real time signal according to one of the digital standards e g an EUTRA LTE The digital signal is routed to and output at the digital interface BBMM 1 OUT The R amp S EX IQ Box serves as a digital baseband interface between a device under test DUT and the R amp S SMW The R amp S EX IQ Box works as transmitter it receives the digital I Q signal from the R amp S SMW but also the clock signal of the connected device under test DUT The R amp S EX IQ Box processes the digital signal and outputs it at the user interface UI module with the required clock rate Because this clock rate is lower than the sample rate of the received data the R amp S EX IQ Box buff
7. List OF Command Sisi a 31 o A P PP eee eee aos cee entemne 32 About this Manual 1 Preface 1 1 About this Manual This User Manual provides all the information specific to the options R amp S SMW K551 All general instrument functions and settings common to all applications and operating modes are described in the main R amp S SMW user manual The main focus in this manual is on the provided settings and the tasks required to generate a signal The following topics are included e Welcome to the Slow IQ option R amp S SMW K551 Introduction to and getting familiar with the option e About the Slow IQ Signal Generation Background information on basic terms and principles in the context of the signal generation e Configuration and Settings A concise description of all functions and settings available to configure signal gen eration with their corresponding remote control command e How To Generate Signals with Reduced Speed for FPGA Tests The basic procedure to perform signal generation tasks and step by step instruc tions for more complex tasks or alternative methods As well as detailed examples to guide you through typical signal generation sce narios and allow you to try out the application immediately e Remote Control Commands Remote commands required to configure and perform signal generation in a remote environment sorted by tasks Commands required to set up the instrument or to perform common tasks on the instrument are provi
8. R amp S SMW K551 Generation of Digital Slow IQ Signals User Manual LL 1176 9564 02 02 E T ab 5 pd is n 2 5 o wn Dd E This document describes the following software options e R amp S SMW K551 1413 9724 xx This manual describes firmware version FW 3 20 324 xx and later of the R amp S SMW200A 2015 Rohde amp Schwarz GmbH amp Co KG Muhldorfstr 15 81671 Munchen Germany Phone 49 89 41 29 0 Fax 49 89 41 29 12 164 Email info rohde schwarz com Internet www rohde schwarz com 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 the owners The following abbreviations are used throughout this manual R amp S SMW200A is abbreviated as R amp S SMW R amp S EX IQ BOX is abbreviated as R amp S EX IQ BOX R amp S DigIConf is abbreviated as R amp S DiglConf the license types 02 03 07 11 13 16 12 are abbre viated as xx Me Prendas 5 1 1 About this Manali ciciciccccccctssccccevecctsteecsiccscecevesccevesvvetneneectid iennecaversstdenessiecteseeteeveeset 5 1 2 Documentation OvervieW lt occii ccccciecccsceccedsccceceeeccneseevsctsaanestedsceeesncessssecanasedeceeseeeeevensttsai 5 1 3 Conventions Used in the Documentation cccccceeeeeeeeeseeeeeeeeeeeeeeeeeeeeeeeseeeeenees 7 1 3 1 Typographical Conventos cion ia 7 1 3 2 Conventions f
9. R amp S SMW product page at http www rohde schwarz com product SMW200A html gt Downloads gt Manuals User Manual User manuals are provided for the base unit and each additional software option The User Manual for the base unit is a supplement to the Getting Started manual and provides basic information on operating the R amp S SMW in general In this manual all instrument functions are described in detail Furthermore it provides a complete description of the remote control commands with programming examples An introduc tion to remote control is provided as well as information on maintenance instrument interfaces and troubleshooting In the user manuals for the individual software options the specific instrument func tions of this option are described in detail For additional information on default settings and parameters refer to the data sheets Basic information on operating the R amp S SMW is not included in these user manuals The user manuals are available in PDF format in printable form on the Documenta tion CD ROM delivered with the instrument All user manuals are also available for download from the Rohde amp Schwarz website on the R amp S SMW product page at http www rohde schwarz com product SMW200A html gt Downloads gt Manuals Service Manual The service manual is available in PDF format on the CD delivered with the instrument It describes how to check compliance with rated specifications in
10. The selected transmission mode and system configuration determine the stream map ping of the digital signals to the output digital I Q interfaces If multiplexed signals are used this mapping is fixed see chapter 3 4 Default Stream Mapping on page 16 Single stream transmission The generated digital streams are output at the digital I Q interface transmitted to the R amp S EX IQ Box and output at its user interface with the required clock rate Multiplexed stream transmission If multiplexing is used the R amp S SMW outputs up to four multiplexed streams at one digital 1 Q interface BBMM 1 2 OUT see figure 3 2 The multiplexing follows the rules e streams are numbered as stream 0 to stream 3 per digital I Q output interface i e stream A at the BBMM 1 OUT and stream B at the BBMM 2 OUT are both indica ted as stream 0 e samples belonging to a stream are indicated by a combination of two marker sig nals Ul_GP_0O and Ul_GP 4 on figure 3 2 data samples are indicated as DsteameSample e samples order may vary see the third sample on figure 3 2 e signal valid Ul_VALID indicates valid samples see figure 3 3 e clock signal D_ CLK_UIN is required as a reference for PLL e digital l Q data is output as and Q signals Ul_I 0 UI_I_17 and UI_Q O UI_Q_17 e multiplexed samples have to be evaluated one by one see also figure 3 3 Transmission Modes Example Signal at the user interface of the R amp S EX IQ Box four
11. a 7 S Semice MANU Al viviana tati 6 Signal outputs Fading and baseband configuration ee 22 Slow IQ BA A eileen 9 See reduced Speed s sinrninesdiariia ninii 9 Slow IQ signals SENGS ereire ir eea teesi aiai 22 T TUNAS ante iE Ei 7 U User manuals ossis naa ai 6 WwW WED HID miosina araisa 7
12. ameters describing the digital output signal i e peak level and level values 2 To configure the level settings of the output streams select Signal Output 1 0 Digital Outputs A eae State Off On Power On State 1 Q Out Off Set Level Via Level Channel O Stream A Level Channel 1 Stream C Level Channel 2 Stream E Level Channel 3 Stream G For step by step description on how to use the provided settings refer to chapter 5 How To Generate Signals with Reduced Speed for FPGA Tests on page 24 System Configuration gt Fading Baseband Configuration Available are the standard settings and the following parameter dedicated to the slow IQ signal generation Signal Outputs System Configuration gt Fading Baseband Configuration Defines whether an analog and digital or digital only signal is generated Analog amp Digital In this default mode the instrument generates signals with high data rate Generated streams can be mapped to the analog connectors RF I Q OUT and to the digital 1 Q interfaces BBMM FAD Digital Only Digital Only Multiplexed requires option R amp S SMW K551 R amp S SMW can generate digital signals with reduced speed depend ing on the device connected to the digital 1 Q interfaces The supported configuration and mapping of the generated streams to the digital 1 Q interfaces depends on the selected mode e In Digital Only mode up to 4 streams can be mapped to the
13. and Additional Equipment 3 About the Slow IQ Signal Generation Testing of systems that do not support real time signals requires signals with an artifi cially reduced speed or the so called slow I Q signals An example of this kind of sys tem are the FPGA based hardware emulators A typical signal generator generates test signals in real time and with sample rate that is several times grater than the sample rate such system can handle Hence you have to adjust several signal settings that are often distributed into different dialog boxes e g to change the sampling rate of the baseband signal to enable down sampling of the output signal to calculate and configure fading delay and Doppler shifts etc In R amp S SMW equipped with option R amp S SMW K551 the generation of the slow IQ signals is a straightforward solution This section describes how to use the dedicated functions to generate and output slow IQ digital signals with a sampling rate as required by the device under test DUT and upon a request form a connected R amp S EX IQ BOX 3 1 Required Options and Additional Equipment In the following we assume that the R amp S EX IQ Box device interface module is con nected to the R amp S SMW The inter operation with other devices is not described The requirement and the limitations listed in Limitations and Interdependencies with Other Parameters apply to any connected further processing device that supports the slow I Q
14. ategx i Box Clockpyr E g if the DUT requires a 1 MHz clock signal ClockRategy i935 1 MHz R amp S SMW K551 How To Generate Signals with Reduced Speed for FPGA Tests 6 Select EX IQ Box User Defined gt State gt On lt R amp S DiglConf SESE ees File Tools Debug Help a E SCPI su info 7 Inthe R amp S DiglConf select the smart graphic TR1 to enlarge it The Transient Recorder dialog opens and confirms the expected LTE spectrum EX 1Q BOX 100024 Transient Recorder 1 feos i Graphics State of O On Power Spectrum FFT points 2048 AVG 0 Data Source DIG IQ IN 1 Display Settings Display Type Power Spectrum Sf Acquisition Settings Aquisition Length 2048 x Decimation Factor 1 Trigger Settings Trigger Mode Continuous a Trigger Source Software E o Trigger Position OSamples o 3 Status Recording 2 0 5 0 4 0 3 0 2 0 1 0 1 0 2 0 3 0 4 0 5 0 f fc MHz How To Generate a 1x2x8 MIMO Digital Signal for FPGA Tests with Slow IQ Sig nals Follow the main steps described in How To Generate a 1x2x4 MIMO Digital Signal for FPGA Tests with Slow IQ Signals on page 24 1 Connecting the instruments as shown on figure 5 1 User Manual 1176 9564 02 02 27 Request ia Stream gt R amp S EX IQ BOX 1 3 A C E G S 4 Seen Dit 10 y O k Femme OOO
15. ded in the main R amp S SMW user manual Programming examples demonstrate the use of many commands and can usually be executed directly for test purposes e List of remote commands Alphabetical list of all remote commands described in the manual e Index 1 2 Documentation Overview The user documentation for the R amp S SMW consists of the following parts e Getting Started printed manual e Online Help system on the instrument incl Tutorials e Documentation CD ROM with Getting Started Online help system Web Help and chm as a standalone help Documentation Overview User Manuals for base unit and options Service manual Data sheet and product brochure Links to useful sites on the Rohde amp Schwarz internet Online Help The Online Help is embedded in the software It offers quick context sensitive access to the complete information needed for operation and programming The online help contains help on operating the R amp S SMW and all available options Getting Started The Getting Started is delivered with the instrument in printed form and in PDF format on the documentation CD It provides the information needed to set up and start work ing with the instrument Basic operations and typical signal generation examples are described Safety information is also included This manual is available in several languages You can download these documents from the Rohde amp Schwarz website on the
16. erating procedures The term select may refer to any of the described methods i e using a finger on the touchscreen a mouse pointer in the display or a key on the instrument or on a key board Notes on Screenshots When describing the functions of the product we use sample screenshots These screenshots are meant to illustrate as much as possible of the provided functions and possible interdependencies between parameters The shown values may not represent realistic test situations The screenshots usually show a fully equipped product that is with all options instal led Thus some functions shown in the screenshots may not be available in your par ticular product configuration Accessing the Slow IQ Settings 2 Welcome to the R amp S SMW K551 Option The R amp S SMW K551 is a software option that allows you to generate digital signals with reduced speed These kind of signals are commonly known as Slow IQ signals R amp S SMW K551 key features e Generation of single stream or multiplexed digital signals with potentially reduced speed a k a Slow IQ e Generation of digital signals with data rate as required by the DUT and as reques ted by the processing instrument e g R amp S EX IQ Box e Simultaneous output of up to eight digital streams on two digital interfaces This user manual contains a description of the functionality that the application pro vides including remote control operation All functions not
17. ers data samples and monitors its buffer level At a predefined buffer level the R amp S EX 1Q Box requests new signal sam ples form the R amp S SMW Upon this request the instrument generates the exact amount of samples and with the sample rate of the current digital signal The digital signal at the user interface of the R amp S EX 1Q Box carries information in form of data words where a data word consists of up to 18 data bits DO D17 Both the parallel and serial data formats are supported The digital data is transmitted with a clock rate as received from the DUT Refer to the R amp S EX IQ Box Operating Manual for detailed information as well as for a description of the pin assignment on the user interface Ul 3 3 Transmission Modes The R amp S SMW can output the generated digital I Q signals in two transmission modes as single steam or as multiplexed signals see table 3 1 Table 3 1 Overview of the main differences between the transmission modes Transmission Modes Transmission GUI Setting Number of Suitable for See also mode digital streams Single stream Signal Outputs gt Digital lt 4 Only generating signals with max available bandwidth Single stream transmission on page 14 Multiplexed signals Signal Outputs gt Digital 2 Only Mux with 2xR amp S EX 1Q Box simul taneous testing of up to 8 Multiplexed stream transmis sion on page 14 streams
18. hether an analog and digital or digital only digital multiplexed signal is gener ated Parameters lt Mode gt Example Options Manual operation DIGMux DIGital ALL ALL The generated signal is output at the analog and the digital inter faces DIGital DIGMux The generated signal is output as single stream or multiplexed digital signal at the digital interfaces RST ALL SCONfiguration OUTPut MODE DIGMux DIGMux DIGital require option R amp S SMW K551 See Signal Outputs on page 22 7 Further Information For a comprehensive description of the R amp S SMW R amp S EX IQ Box and R amp S DiglConf software refer to e the R amp S SMW user manual e the R amp S EX IQ Box Digital Interface Module amp DiglConf Configuration Software Operating Manual e the EUTRA LTE Digital Standard for R amp S SMW user manual The latest versions are available for download at the product homepage e http www rohde schwarz com product SMW200A html e http www rohde schwarz com product EX IQ Box html List of Commands SCONfiguration QUTPUEMODE cota A enantio a asda adie 29 Index D Digital only signals SMN iia 22 Documentation Overview saco rines 5 G Getting started circo risas 6 l Installation tard 9 M Multiplexed digital streams SONO attractions 22 O Online TS o esene EEEE 6 Output signal Digital ony sadense EEEE 22 R Reduced speed signal aka SIOWAG surta aa 9 Release MOLES aninion dida i
19. lar use case 1 Connecting the instruments See To connect the instruments for slow IQ tests on page 24 2 Configuring the R amp S SMW to generate the required signal See To configure the R amp S SMW on page 24 3 Configuring the DUT if required and determining its clock rate 4 Configuring the digital interface module R amp S EX IQ Box See To configure the R amp S EX IQ Box on page 25 To connect the instruments for slow IQ tests Use the example test setup on figure 3 1 but use four R amp S EX IQ Box instead The test setup assumes a ClockRateras Ex ig Box lt SamplingRatestream 1 Connect the four interface modules R amp S EX IQ Box to the R amp S SMW Connect the DUT to the four interface modules R amp S EX IQ Box 2 Provide all four interface modules R amp S EX IQ Box with the clock signal of the DUT to ensure a synchronous signal generation To configure the R amp S SMW 1 Select System Configuration and a enable a 1x2x4 MIMO scenario b enable BB Sources gt Coupled c select Signal Outputs gt Digital Only 2 Enable the generation of a baseband signal e g a select Baseband gt EUTRA LTE and enable a signal with Channel Bandwidth 20 MHz e g select General gt Test Models gt E TM1_1__ 20MHz b Select EUTRA LTE gt General gt Filter Clipping gt Filter The parameter Sample Rate Variation 30 72 MHz indicates the user sample rate c Select EUTRA LTE gt State gt O
20. ltiplexed Possible scenarios and default stream mapping System Configuration BBMM 1 OUT BBMM 2 OUT 1xMx2 na na 1xMx3 Stream A C Stream B Default Stream Mapping System Configuration BBMM 1 OUT BBMM 2 OUT 1xMx4 2xMx2 Stream A C Stream B D 1xMx8 3xMx2 4xMx2 5x1x1 Stream A C E G Stream B D F H 3 4 1 Limitations and Interdependencies with Other Parameters When you generate digital signals I Q streams as slow IQ signals consider that the following applies e the R amp S SMW synchronizes the generated baseband to its internal clock signal external clock signals are not supported e the clock rate required by the R amp S EX IQ Box should not exceed the sampling rate of the generated digital signal ClockRate rgs ex 10 B0x SamplingRate stream MuxStreams see also example How to find out the max ClockRatergs ex 1a gox for that an addi tional reference frequency is not required on page 18 Oo if multiplexed streams are used the generated baseband signals have limited max imum baseband bandwidths BWeaseband max Which also influence the baseband bandwidth related parameters like for example the maximum frequency offset ARB sample rate AWGN etc See table 3 4 Note The maximum stream bandwidth must not exceed the provided maximum baseband bandwidth BWstream BWpaseband_max Table 3 4 Multiplexed streams Signal Outputs gt Digital Onl
21. mode Required options The equipment layout for output of digital I Q signal includes e option Baseband Generator R amp S SMW B10 per signal path and option Baseband main module with two I Q paths R amp S SMW B13T e two options Digital Baseband Output R amp S SMW K18 e four options Fading simulator R amp S SMW B 14 incl one digital interface FADER 3 4 1 2 per installed option See also chapter 3 3 Transmission Modes on page 13 e option MIMO Fading R amp S SMW K74 e option Slow IQ R amp S SMW K551 e optional option Multiple Entitities R amp S SMW K76 e further options may be required For more information refer to the instrument specification data sheet R amp S SMW K551 About the Slow IQ Signal Generation Required additional equipment One digital interface module R amp S EX IQ Box per digital I Q interface each fulfilling the following requirements e must have serial number grater than 102000 to support a 200 MHz digital input sig nal e should be controlled by the R amp S DiglConf software Digital Interface Configuration for the R amp S EX IQ Box to be installed on an external PC e should be equipped with a single ended or a differential Breakout Board For more information see the R amp S EX IQ Box Operating Manual Required cables e Per digital interface module R amp S EX IQ Box one R amp S SMU Z6 cable for connecting Rohde amp Schwarz digital baseband interfaces i e to connec
22. mp S EX IQ Box Default Stream Mapping Clock DKON L LI L L LI LI L LU Signal valid UL VALID Marker 1 UI_GP_0 y Marker 2 UI_GP_4 E E E y Stream 0111013101210 Data word Do0 X Do1 X Do2 X Do3 X Dstream Sample I y x d a i i Stream 0 Do0 Do1 Do2 Do3 Fig 3 3 Example Signal at the user interface of the R amp S EX IQ Box one multiplexed stream X unused samples to be discarded Stream 0 Stream B 3 4 Default Stream Mapping The table 3 2 and table 3 3 provide information on the default stream mapping to the digital interfaces default interface direction and possible configurations depending on the selected system configuration and the transmission mode single or multiplexed streams See chapter 3 1 Required Options and Additional Equipment on page 11 for an overview of the required options for each transmission type The following abbreviations are used e depicts two or more multiplexed streams e M depicts the number of generated basebands value range 1 8 Table 3 2 Single stream Signal Outputs gt Digital Only Possible scenarios and default stream mapping System Configuration BBMM 1 OUT BBMM 2 OUT FAD 3 OUT FAD 4 OUT 1xMx2 Stream A Stream B 1xMx3 Stream A Stream B Stream C 1xMx4 Stream A Stream B Stream C Stream D 2xMx2 Table 3 3 Multiplexed streams Signal Outputs gt Digital Only Mu
23. multiplexed streams In the following we assume e an 1xMx8 system configuration where the four streams B D F and H are multi plexed for the BBMM 2 OUT digital interface e a 16 bit data word and a parallel data format The figure 3 2 shows the multiplexed signal at the user interface of the R amp S EX IQ Box Clock D_CLK_UIN Signal valid i UI_VALID J Marker1 wor Ltt Li i Livi t J LI Marker 2 i UI_GP_4 Stream 0 1 2 i 3 0 1 2 i 3 i 0 2 1 3 i l Data word x D 01D 01D201D30 Do1 1 D111 D211D31 X 1 X 1 X1 X Do2 D22 D 2 D2 DstreamySample I I 1 1 1 1 I i Sample 0 1 2 Stream 0 Do0 Do1 Do2 Stream 1 D 0 D 1 sample not valid D42 Stream 2 D20 D21 D22 Stream 3 D30 D31 D32 Fig 3 2 Example Signal at the user interface of the R amp S EX IQ Box four multiplexed streams Stream 0 Stream B Stream 1 Stream D Stream 2 Stream F Stream 3 Stream H Example Signal at the user interface of the R amp S EX IQ Box one multiplexed stream In the following we assume e an 1xMx3 system configuration where the stream B is multiplexed for the BBMM 2 OUT digital interface e there is no second stream multiplexed on this digital interface e the samples of stream B are indicated as Stream 0 all other samples are unused and should be discarded The figure 3 3 shows the multiplexed signal at the user interface of the R a
24. n 3 Select I Q Digital Outputs gt General and for each of the streams configure a Source gt User Defined b Value 30 72 MHz Each generated stream will be generate with this sample rate 4 Select l Q Digital Outputs gt State gt On 1 Q Digital Outputs State Off On Power On State Q Out Off x User Defined Y 30 720 000 000 Me 7 To configure the R amp S EX IQ Box We assume that an external PC is connected to the R amp S EX IQ Box the R amp S Digl Conf software is running on this external PC and the R amp S EX IQ Box is controlled form the software Several settings of the R amp S EX IQ Box have to be configured are required by the con nected DUT 1 Start the R amp S DiglConf software 2 Select DIG IQ IN gt SMW gt Hardware Info gt Slow I Q Sample Clock Request gt On Instrument Type Serial Number In the R amp S SMW the parameter I Q Digital Outputs gt General gt Slow IQ gt State gt On confirms that the R amp S EX IQ Box requests the sample clock automatically 3 Select EX lQ Box User Defined gt Direction gt Transmitter 4 Select EX IQ Box User Defined gt Protocol and EX IQ Box User Defined gt Data and change the default settings if required 5 Select EX IQ Box User Defined gt Clock and configure e Clock Source gt User Interface eset the value of the parameter Clock Rate to the clock required by the DUT i e ClockR
25. or Procedure DeSCriptions 0 cccccecceeeeeeeeecceeceeeeeeeeeeeseeeeceacaeeeeeeeeereess 8 1 3 3 Notes On Screenshots scott 8 2 Welcome to the R amp S SMW K551 Opti0N oooccccccccconcncnnnncnnncnononononon 9 2 1 Accessing the Slow IQ Settings cccscccsseeeeeeeceeeseeeeeeeeeeeseeeeeeeeeessaeeeeeeeeessensseseeeeeeas 9 22 SCOPE ricci ono o cvesceddeceustanaunewoed cecesduceeessscneseceteerere 10 3 About the Slow IQ Signal Generati0N ccommnnnnccccnnnnnonacancncncnnnnannnns 11 3 1 Required Options and Additional Equipment cccccceeeeeeeeeeeeseeeneeeeeeeeeeeeeees 11 3 2 The Principle of Generation of Signals with Reduced Speed cccccsseeeeseseeenees 12 3 3 Transmission MOGCS kasi cissnssaostenacencessandansnsnsntnasnanaaneinnaendxadanonnananneesscnahsannanasndinnnnaantcats 13 3 4 Default Stream Mapping 2 ccccccceceeceeeeeeeeeneeeeeeeeeeeeeseeseeaseaeeeeeeseeeeseeseseeeeseeneeeees 16 3 4 1 Limitations and Interdependencies with Other Parameters ccccccccceessseesseesseees 17 3 5 Synchronization ISSUCS cccceeeeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeseaeseseeeesesesesseeeseseesesssaeeesenees 18 4 Slow IQ Related SettinQS ooococcccnnnnccoconoccncnccnncccnnnnnnnnnnnnannnananannnnnnnnnns 19 5 How To Generate Signals with Reduced Speed for FPGA Tests 24 6 Remote Control COMMANGG ceeeeeeeeeeeeeeeeeeeeeeeeeeeeneeeeeeeeneees 29 7 IFURNEeRINTO NAO i ae ii iii 30
26. strument function repair troubleshooting and fault elimination It contains all information required for repairing the R amp S SMW by replacing modules 1 3 1 3 1 Conventions Used in the Documentation Release Notes The release notes describe the installation of the firmware new and modified func tions eliminated problems and last minute changes to the documentation The corre sponding firmware version is indicated on the title page of the release notes The latest versions are available for download from the R amp S SMW product page at http www rohde schwarz com product SMW200A html gt Downloads gt Firmware Web Help The web help provides online access to the complete information on operating the R amp S SMW and all available options without downloading The content of the Web Help corresponds to the user manuals for the latest product version The web help is available from the R amp S SMW product page at http www rohde schwarz com product SMW200A html gt Downloads gt Web Help Tutorials A set of tutorials is embedded in the software The tutorials offer guided examples and demonstrations on operating the R amp S SMW Application Notes Application notes application cards white papers and educational notes are further publications that provide more comprehensive descriptions and background informa tion A subset of application notes is provided on the documentation CD ROM delivered with the instrument
27. t the R amp S EX IQ Box to the DIG IQ interfaces of the R amp S SMW USB cable for connecting the external PC to the R amp S EX IQ Box suitable cable for connecting the breakout board of the R amp S EX IQ Box to the DUT e LAN cable for connecting the external PC and the R amp S SMW to the LAN e optional BNC cable if a trigger signal is required e if the test setup requires an external reference frequency is required additional BNC cables whereas one of them shorter than 1m and one T adapter see chapter 3 5 Synchronization Issues on page 18 3 2 The Principle of Generation of Signals with Reduced Speed In the general case R amp S SMW generates the digital streams according to the selected System Configuration and maps them to the available analog RF and l Q outputs and to the digital 1 Q interfaces The generated signal may use the maximum supported data rate see data sheet When you connect a further processing instrument to the digital interfaces of the R amp S SMW you define the sample rate of the generated signal Dedicated modes for the generation of digital signals R amp S SMW equipped with the option Slow IQ R amp S SMW K551 provides two additional signal outputs modes the Digital Only Digital Only Multiplexed modes dedicated for the generation of digital signals In these modes the R amp S SMW does not output the digital signals continuously but upon a request from a connected further processing device
28. ts are disabled and the External RF and IQ tab is not displayed System Configuration Set to Default s Basebands Mode Advanced ignal Outputs Digital Only Multiplexed ba Basebands Streams Tx Antennas Rx Antennas 24x 87 BB Source Config Coupled Sources Common Applications Slow IQ Apply OK 5 Select I Q Stream Mapper to observe the mapping of the generated streams to the digital I Q interfaces The generated digital streams are mapped to the digital interfaces as described in Default Stream Mapping if multiplexed streams are used the mapping is fixed The block diagram confirms the generation of digital only signals too 1 status indication confirming the generation of digital signals all other indication on task bar are dis abled 2 disabled analog RF and 1 Q outputs 3 indication of multiplexed streams e g streams A C G E are routed to the BBMM 1 connector see table 3 3 To access the I Q Digital settings In the block diagram select I Q Digital 1 Q Digital Outputs State Off On Power On State 1 Q Out Off i Sample Rate Per Stream User Defined Connected Device Note Multiplexed digital streams that are routed to the same digital output interface BBMM 1 or BBMM 2 have the same signal parameters e sampling rate i e the available bandwidth is distributed evenly e impairments e par
29. y Multiplexed Maximum baseband bandwidth depending on the number of multiplexed streams MuxStreams Baseband bandwidth related BWeaseband_max parameters e g frequency off set 1 2 200 MHz 80 MHz 3 4 100 MHz 80 MHz gt 4 50 MHz 40 MHz sion O To utilize the full available stream bandwidth BWstream use the single stream transmis Consider that one R amp S EX IQ Box per streams is required Synchronization Issues 3 5 Synchronization Issues In test setups with more than one instruments it is essential that all instruments use the same reference clock While testing DUTs with slow IQ signals the clock signal is usually provided by the DUT Even in a test setup with more than one R amp S EX IQ Box you only have to dis tribute the clock signal of the DUT to the R amp S EX IQ Box and to set the clock rate to the required value Additional reference frequency is not required See also figure 5 1 If you however generate signals with clock rate that is equal to the sampling rate of the digital standard you have to provide all instruments with the same reference fre quency see figure 3 4 Referecne Frequency R amp S EX lQ BOX 1 e mu Ol ital 1 Q 3 Al Signal gt e Digital Data Breakout Board DUT format REF IN __ Referecne D Frequency U REF IN R amp S EX IQ BOX 2 T Digital 1 Q gt signal rones alle Digital Data
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