1GP103 - Rohde & Schwarz
Contents
1. Overview RF out Please see also the SGT data sheet product brochure and or user manual for complete and detailed information on the instrument 3 1 4 The SGMA GUI The SGMA GUI is the user interface for the instruments SGS SGU and SGT e J SGMA GUI File Setup Help aoa Info m SGS 101705 Freal 1 950 000 000 000 cnz fer On moa Bn PEP 74 74 dBm Level 96 20 s8m ner EM 5 sGT 101650 gt Freq 90 000 000 000 fmz fr m moa on PEP 21 90 dBm Levet 21 90 a8m rer m ARB Narluser DC wv Baseband AWGN Impairments Q Mod a RF _conti llapersj n contin S contig m conna S cono ft f On On On On iv ARB AWGN IMP BB Input User 1 Trigger User 2 Next Trig The PC software can control multiple instruments at once and provides full instrument control e g including firmware update Please see also the SGMA GUI user manual for complete and detailed information on the software Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 6 1GP103_1E Overview 3 2 The SMW The SMW is a high end RF and microwave vector signal generator designed for the most demanding applications It is ideal for generating complex digitally modulated signals of high quality required for the development of new wideband communications systems the verification of 3G and 4G base stations or in the aerospace and defense sector Its frequency rang2. 1GP103_1E Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 13 1GP103_1E The SMW with External RF Outputs 1 Q OUT 1 External Instrument Configuration Symbolic Name Hardware Channel Name IP Address RF Path Press the Apply and Connect button Back in the System Configuration menu the connected instrument is displayed and the connection state is indicated System Configuration Disconnect All Remote Auto Connect Tei 1 000 000 000 00 30 00 To connect further instruments repeat the steps described above for different output connectors Auto Connect Feature only for SGT The Auto Connect feature simplifies the process of connecting a SGT If the Auto Connect check box is active the SMW will automatically detect a SGT at its digital output and establish the connection via the USB LAN control line The user does not need to perform the manual steps described above Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 14 The SMW with External RF Outputs 5 3 Remote Control Remote control is supported for the following configurations v SGT connected to digital output of SMW v SGS connected to analog output of SMW If an external instrument is connected the SMW automatically sets the following parameters and triggers the following actions over the control line Preset RF frequency RF level Crest factor of I Q signal External 10
3. tab if the RF output of the external instrument is turned on RF State parameter Solution 2 Check on the SMW I Q Stream Mapper tab if there is a stream routed to the wanted output Check if the baseband generator associated with this stream is turned on and in running state issue 3 The REF EXT LED on the front panel of the connected instrument is off although the instrument is connected and an external reference signal is fed to the instrument Solution 1 Configure the instrument to use the external reference signal Send the following SCPI commands via the Remote Control tab LOSCillator SOURce INT ROSCillator OUTPut FREQuency 10MHz ROSCillator EXTernal FREQuency 1OMHz ROSCillator SOURce EXT Check if the REF EXT LED on the front panel of the instrument is green Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 18 1GP103_1E The SGT SGS Stand Alone with SGMA GUI 6 The SGT SGS Stand Alone with SGMA GUI The SGMA GUI is the user interface for the instruments SGT and SGS The PC software can control multiple instruments at once and provides full instrument control The user can use the software for manual control of the instruments and for monitoring the instrument status during remote control 6 1 Establish Remote Connection 6 1 1 Automatic Turn on the instrument and press the ID key on the front panel of the instrument The key will start
4. MHz reference oscillator RF output state on off I Q modulator state on Digital I Q input state on only on SGT Digital I Q input sample rate only on SGT Baseband clock sync mode Dig I Q In only on SGT the SGT gets the baseband clock and trigger from the SMW via the digital connection If an external instrument is connected the SMW automatically activates its own analog or digital output to ensure signal flow Specific settings can be made via the SMW GUI in three different ways 1 By using a user defined initialization sequence i e a set of SCPI commands The initialization sequence is automatically transmitted to the external instrument during the connection process 1 Q OUT 1 External Instrument Configuration Remote Config 2 During operation the user can control basic RF settings of the external instruments via the System Configuration menu External I Q Rem RF RF Frequency RF Level RF Instrument Conn Conn s Coup IHz dBm State Config aA SGS100A 101704 1 000 000 000 00 0 00 6n 4 J 1 1 A Dir 1 Q OUT 1 Out 3 During operation the user can send a remote SCPI command or a SCPI command sequence file to the external instrument 1GP103_1E Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 15 The SMW with External RF Outputs 1 Q OUT 1 External Instrument Configuration SOUR POWER LIMIT 20 Command OUTPUT AMODE FIXED OU
5. to blink in orange color Now start the SGMA GUI The order is important first press key then start SGMA GUI The instrument will automatically be added to the list of available instruments and set active amp SGMA GUI olal 2 SGT 101687 Freq 1 000 000 000 000 GHz an Scan New Delete Clear Edit Export Ao ee u os Scan LAN instruments with host name prefix Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 19 1GP103_1E The SGT SGS Stand Alone with SGMA GUI 6 1 2 Manual Turn on the instrument and start the SGMA GUI Click on the Instruments icon Press the Scan button The SGMA GUI will now scan for connected instruments on all supported interfaces USB LAN PCle The detected instrument will appear in the list of available instruments 2 A B s6T101687 SCT OF S SGMA GUI File Setup Help 2 s a ea 1 000 000 000 000fcnz BE Mos 1 000 000 000 000 cx BF Mog om j cen Check if the status indicator is green A green indicator confirms that the remote connection is established Status indicator Max RF frequency indicator Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 20 The SGT SGS Stand Alone with SGMA GUI 6 2 Troubleshooting Issue 1 The SGMA GUI main window is empty gt SGMA GUI o amp x Baa Solution 1 Establish a remote connection to an inst
6. 4 i Frame Start Marker oo O 250 ns 200 ns 150 ns 100 ns Sons The user has the possibility to cancel any small delay by applying an intended delay to the baseband signals using the SMW s digital impairments feature 1 Q Modulator A aoe 1 a VQ ModA Offset 0 00 Q Offset 0 00 Gain Imbalance 0 000 dB Quadrature Offset 0 00 deg Skew 0 ps IQ Delay 5 000 ns FADER S O D The I Q Delay parameter delays the baseband signal with picosecond resolution By adjusting this parameter the RF output signals can be perfectly aligned in time if required for the application Note On the SMW the I Q Delay parameter for the digital I Q outputs can only be set if a SGT is connected Otherwise this parameter is greyed out Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 17 1GP103_1E The SMW with External RF Outputs 5 6 Troubleshooting issue 1 The RF outputs are delayed relative to each other Solution 1 Make sure that the basebands of the SMW are all synchronized Check the trigger settings Issue a trigger event Solution 2 Compensate small delays using the I Q Delay parameter see section 5 5 Note Large delays microsecond range are due to some failure Check baseband synchronization in this case solution 1 Issue 2 There is no RF signal output from the external RF instrument Solution 1 Check on the SMW External RF and Q
7. Connecting and Interfacing with SGMA Instruments Application Note Products R amp S SMW200A R amp S SGS100A R amp S SGU100A R amp S SGT100A The SGMA products from Rohde amp Schwarz are optimized for use in production and automated applications Their key characteristics are high speed and a compact design The instruments are also an ideal enhancement for the R amp S SMW200A in MIMO applications They can interface to the high end vector signal generator and serve as additional RF outputs This application note explains how to connect and interface with the SGMA instruments and gives some recommendations and hints about their use It helps the user to get started and to understand how the instruments interact a ow a 2 2 S S SO rat O S oe 2 lt O ON Table of Contents Table of Contents 1 IFITEOGUCLONY NOTE consira E EE aa 3 2 NUR OGUCHION secs seeces tenes noes nese iga EErEE 3 3 OV STOW A AE EE A EEE densi A O neces dane denestenesenes 4 3 1 The SGMA POU C I S oveisescccen cee vecenecuseenenes n ea E E 4 3 1 1 TESO creceee ex canis testy oes sane tease ae cece ae Sasa eee nee caente ae canweateean acest caneeniacuewenees 4 3 1 2 TE SG eae e E E E 5 3 1 3 Te SGT e nee enc se etees secs aatiestenew seuae es newaeeuece sunset autor voetba 5 3 1 4 TRE SOMA GUL oiei a a E s 6 3 2 ENG SNE ea E E E 7 4 The SGS SGU Combination cccssccenseeesesescenseeee
8. MA Instruments 3 Overview 3 Overview This section gives a brief overview of the individual instruments covered by this application note and their key characteristics 3 1 The SGMA Products 3 1 1 The SGS The SGS is an RF source designed to meet the requirements of automated test systems It is available as a CW source or as a vector signal generator with an integrated I Q modulator Its frequency range is up to 12 75 GHz The SGS can be controlled via e the SGMA GUI PC software via USB LAN or PCle e the SMW via USB or LAN e or remotely using SCPI commands via USB LAN or PCle Please note that the SGS has no integrated baseband generator It requires external I Q signals when operated as a vector signal generator The following simplified block diagram illustrates the functional principle of the SGS Analoga COS i iy IQ Modulator O OO L _ A 80 MHZ 12 75 GHz Step Attenuator CE a Option m ooN a ee 7 Se ee ar RF out OCXO REF LO out Option Frequency REFLOM SGS100A Please see also the SGS data sheet product brochure and or user manual for complete and detailed information on the instrument Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 4 1GP103_1E Overview 3 1 2 The SGU The SGU is an upconverter extending the frequency range of the SGS up to 40 GHz When connected properly e g via the PCle interface the SGS recognizes the SGU
9. Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 22 About Rohde amp Schwarz Rohde amp Schwarz is an independent group of companies specializing in electronics It is a leading supplier of solutions in the fields of test and measurement broadcasting radiomonitoring and radiolocation as well as secure communications Established more than 75 years ago Rohde amp Schwarz has a global presence and a dedicated service network in over 70 countries Company headquarters are in Munich Germany Environmental commitment e Energy efficient products e Continuous improvement in environmental sustainability e ISO 14001 certified environmental management system Regional contact Europe Africa Middle East 49 89 4129 12345 customersupport rohde schwarz com North America 1 888 TEST RSA 1 888 837 8772 customer support rsa rohde schwarz com Latin America 1 410 910 7988 customersupport la rohde schwarz com Asia Pacific 65 65 13 04 88 customersupport asia rohde schwarz com China 86 800 810 8228 86 400 650 5896 customersupport china rohde schwarz com This application note and the supplied programs may only be used subject to the conditions of use set forth in the download area of the Rohde amp Schwarz website R amp S is a registered trademark of Rohde amp Schwarz GmbH amp Co KG Trade names are trademarks of the owners
10. S to SGU Semi rigid cable RF out LO in I Q cables in gt out and Q in gt Q out Trigger cable TRIG in out TRIG in out PCle cable PCle PCle te mee gt ia DA C iy ps i pi L i m M mi 7 i LAN n A r g oy VL G 4 y d TRIG imme OUT amy SL co Ki g 4 AIN NAI 2 coe 4p Bd 4 By win 4 p f i J L Nw gt Atle AT eel pa a The following simplified block diagram illustrates the functional principle of the SGS SGU combination 1GP103_1E Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 8 1GP103_1E The SGS SGU Combination l IQ Modulator FSP 12 GHz 20 40 GHz I Q in gt gt Option 1 Q out LO out Frequency Multiplier 10 MHz 20 40 GHz LO in SGU100A 10 MHz 12 GHz a Q Modulator ee _ _ 80 MHz 12 75 GHz Step Attenuator a Option Option m PeO es Sy eam ie eM EE RF out OCXO REF LO out Option Frequency ro SGS100A The I Q signals from an external ARB generator are fed into the SGU For frequencies below 12 GHz the 1 Q signal is routed to the SGS The RF output signal is taken from the SGU The RF output covers the full frequency range from 10 MHz up to 40 GHz If desired an external reference frequency signal or LO signal for synthesizer coupling is fed into the SGS 4 2 Remote Control R
11. TPUT AMODE FIXED Command History 1 SOUR POWER LIMIT 20 OUTPUT AMODE FIXED Send Command Clear History Clear Trace 5 4 Get an Overview The external instruments are shown in the overview diagram The graphical elements of the diagram are hotkeys and lead to the corresponding configuration menus System Configuration External RF and I Q No device connected Oy No device connected 0 Diagram Legend gt nactive Ref Frequency The diagram shows the input and output connectors of the SMW For each output connecior it shows e which I Q stream is output e g stream A if the output is active or inactive a solid line indicates an active output if an external instrument is connected and which one blue color means the RF output of the external instrument is active the connection state is indicated separately 1GP103_1E Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 16 1GP103_1E The SMW with External RF Outputs 5 5 Delays between RF Outputs There is only a very small delay of a few nanoseconds between the internal RF outputs of the SMW and the external RF outputs from the SGT or SGS The following example shows three RF signals from the SMW SGS and SGT on an oscilloscope The horizontal resolution is 50 ns div Horizonte 4 aa l KALASI Diagram1 Ch1 Ch2 Ch3 Ch4 1E Res S00 fs 2 TSas Ri 1 MS L 30h jec So 22112 1
12. W to the external instrument e g an SGS in one of the following ways e USB SMW sas e LAN Direct connection SMW sas Use Auto DHCP mode The SMW selects automatically an IP address The SGS selects automatically an IP address too Both addresses are compatible To connect more external instruments use a LAN switch All instruments select automatically compatible IP addresses Remote Channel Settings FA Visa Resource GPIB Instrument Active QR Strings Address Emulations Connections Code Network Status Connected Hostname rssmw200a1 00952 Workgroup INSTRUMENT IP Address 169 254 1 20 e LAN Network 2 No crossover LAN cable is needed 1GP103_1E Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 12 The SMW with External RF Outputs Use Auto DHCP mode All IP addresses are automatically assigned by the network DHCP Remote Channel Settings x Network Status Connected IP Address 10414 1252 5 2 Establish Remote Connection In the System Configuration menu select the External RF and Q tab System Configuration Touch Config for the output connector you want to use Press the Scan button to scan the LAN and the USB interfaces for connected instruments The found instruments are listed under the External Instrument parameter Select the target instrument from the drop down list
13. automatically as an extension such the combined instruments act as a single unit In this configuration the SGU is controlled via the SGS Please note that the SGU always requires an external synthesizer the SGS is recommended It cannot work stand alone The following simplified block diagram illustrates the functional principle of the SGU ns l IQ Modulator natog gt I 12 GHz 20 40 GHz N ral wooo RF out Q in gt Option Step Attenuator l EEY T N Option Qout s O ET LO out LO in Frequency gt 10 MHz 12 GHz SGU 00 Please see also the SGU data sheet product brochure and or user manual for complete and detailed information on the instrument 3 1 3 The SGT The SGT is an RF vector signal generator with an integrated baseband generator It has been optimized for use in production and automated applications Its frequency range is up to 6 GHz The SGT can be controlled via e the SGMA GUI PC software via USB LAN or PCle e the SMW via USB or LAN e or remotely using SCPI commands via USB LAN or PCle The following simplified block diagram illustrates the functional principle of the SGT Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 5 1GP103_1E ARB Generator Option Lo Digital Qin Baseband section 1 Q Modulator 80 MHz 3 6 GHz Step Attenuator Analog 1 Q in REFILO out Option Frequency REFILO in SGT100A
14. cies up to 6 GHz The SMW offers up to two analog Q outputs and up to six digital I Q outputs The external instruments can be connected via USB or LAN The user can control them directly via the SMW touchscreen Basic settings such as RF parameters are automatically transferred to the connected instrument via the USB LAN control line As a result the whole setup acts like one unit 5 1 Physical Connections An example setup with two external RF outputs looks as follows RF outputs C D j TARR Fan j REF IN I Q signal 10 MHz reference frequency Control USB LAN REF OUT RF outputs A B Per external instrument there are three connections needed e 1l Q signal e 10 MHz reference frequency for frequency synchronization of the synthesizers e Control line either via USB or LAN 1GP103_1E Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 11 The SMW with External RF Outputs I Q connection e Analog I Q connection Use cables of the same type exactly equal in length This is important since otherwise a delay between the and the Q signal is introduced which can degrade signal quality significantly Also use high quality adapters and do not accumulate adapters e Digital 1 Q connection Use the cable R amp S SMU Z6 LVDS cable 10 MHz reference connection lt is mandatory to share the 10 MHz reference signal between the instruments Use daisy chaining USB LAN connection Connect the SM
15. e is up to 40 GHz amp ROHDE amp SCHWARZ SMW200A VECTOR SIGNAL GENERATOR The SMW has a modular scalable architecture offering multiple baseband sources and up to two internal RF outputs If more RF outputs are needed the SMW can connect to the SGS or SGT and use them as external RF outputs A single SMW can generate up to eight baseband signals to optimally address application such as multi standard radio interference testing LTE carrier aggregation and phase coherent beamforming In addition the SMW supports realtime fading for SISO and MIMO The SMW can connect up to six SGTs via digital I Q or two SGSs SGUs via analog Q The SMW offers a user interface for control of the connected instruments Please see also the SMW data sheet product brochure and or user manual for complete and detailed information on the instrument 1 The SMW can be equipped with a maximum of two hardware baseband generators but these can provide multiple logical baseband sources Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 7 The SGS SGU Combination 4 The SGS SGU Combination The combination of SGS and SGU can generate vector modulated signals up to 40 GHz To physically connect the instruments the option SGU Z4 connection kit is recommended 4 1 The SGU Z4 Connection Kit The SGU Z4 connection kit is a set of cables and mounting parts for connecting the SGS and the SGU It includes the following cables from SG
16. emote control of the combined instruments is possible via the SGS The connection between the SGS and the SGU is established automatically via the PCle interface When connected the SGS recognizes the SGU as an extension such that the combined instruments act as a single unit This means that only the SGS needs to be connected e g via LAN or USB to the SGMA GUI or the SMW 4 3 Recommendations Hints Firmware version Use the same firmware version for the SGS and the SGU Use the same version also for the SGMA GUI software Firmware update Currently the SGU firmware update is only possible by directly interfacing the SGU Disconnect the PCle cable when performing a firmware update of the SGU to not affect the SGS Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 9 1GP103_1E The SGS SGU Combination Putting the combined instruments into operation for the first time Run the internal adjustments on the SGU after having connected a SGU to a SGS for the first time To do this make the following steps on the SGS Setup Internal Adjustments Adjust only extension Adjust All Adjust only extension W On Repeat this adjustment whenever you re connected a SGU physically to a SGS Power cycling To switch off the combined instruments it is sufficient to switch off just the SGS The SGU is automatically switched off by the SGS Both instruments are on standby In the same way to switch on the combined in
17. enerator is referred to as SMW The R amp S SGT100A SGMA vector RF source is referred to as SGT The R amp S SGS100A SGMA RF source is referred to as SGS The R amp S SGU100A SGMA upconverter is referred to as SGU The R amp S SGMA GUI PC software is referred to as SGMA GUI The R amp S SGU Z4 connection kit R amp S SGU100A to R amp S SGS100A is referred to as SGU Z4 Introduction The SGMA products comprising the SGS SGU and SGT are optimized for use in production and automated applications Their key characteristics are high speed and a compact design Though compact in size the instruments have excellent RF characteristics e g signal quality and level accuracy and cover a wide frequency range up to microwave frequencies The space saving SGMA instruments are also an ideal enhancement for the SMW in MIMO applications with more than two RF test signals They can interface to the SMW and serve as additional RF outputs In this application the instruments are used to exploit the full capacity of the SMW s powerful digital baseband section This application note explains how to connect and interface with the SGMA instruments and gives some recommendations and hints about their use This document is intended to help the user get started and understand how the instruments interact For complete description and instructions please see the user manuals of the instruments Rohde amp Schwarz Connecting and Interfacing with SG
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19. rument Follow the instructions given in section 6 1 2 Solution 2 In the list of available instruments set the instrument active issue 2 After pressing the Scan button the instrument does not appear in the list of available instruments Solution 1 Make sure that the instrument is connected to the PC running the SGMA GUI via one of the supported interfaces Check the interface network settings Solution 2 In LANs with a DHCP server press the LAN key at the front panel of the instrument for a few seconds to reset the instrument to DHCP mode default Any static IP address will be erased Issue 3 There is no block diagram visible Solution 1 The SGS has no block diagram All settings are done via the Instrument Config button g6 400005 The SGT has a block diagram Use the Diagram button to show or hide tt SGT 101650 gt old GUI design new GUI design The new GUI design is available from software version 3 20 xxx onwards 1GP103_1E Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 21 Ordering Information Ordering Information Please visit the Rohde amp Schwarz product websites at www rohde schwarz com for comprehensive ordering information on the following Rohde amp Schwarz instruments R amp S SMW200A vector signal generator R amp S SGT100A SGMA vector RF source R amp S SGS100A SGMA RF source R amp S SGU100A SGMA upconverter 1GP103_1E
20. struments it is sufficient to switch on just the SGS The SGU is automatically switched on by the SGS 4 4 Troubleshooting issue 1 The SGS does not recognize the connected SGU Solution 1 Power on the instruments direct after each other starting with the SGS This way the PCle connection will be established properly Solution 2 Check in the Extension menu of the SGS if the SGU is set to ON Perform a scan if the SGU is not shown in the list GS 101704 Extension ol el sx Connected Available Instruments Solution 3 only if all other solutions fail In the Maintenance menu of the SGS set the PCle interface mode to Root Complex gt GS 101704 Maintenance co E mE Operation Pcie Interface Mode ad Issue 2 The SGS does not accept frequency settings higher than 12 5 GHz Reason The SGU has not been detected See issue 1 Rohde amp Schwarz Connecting and Interfacing with SGMA Instruments 10 The SMW with External RF Outputs 5 The SMW with External RF Outputs The SMW offers up to two internal RF outputs If more RF outputs are needed external instruments such as the SGT or SGS can be connected to the SMW e The SGS connects to the analog 1 Q outputs of the SMW for frequencies up to 12 75 GHz e The SGS SGU combination connects to the analog I Q outputs of the SMW for frequencies up to 40 GHz e The SGT connects to the digital I Q outputs of the SMW for frequen
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