GPS and Assisted GPS Digital Standard for R&S®Signal Generators Operating Manual (;ÕÂ`<) Operating Manual Test & Measurement 1171.5248.
This document describes the following software options: ● R&S®AMU-K44/-K65 1402.6406.02, 1403.0101.02 ● R&S®SMATE-K44/-K65 1404.5407.02, 1415.1372.02 ● R&S®SMJ-K44 1404.1401.02 ● R&S®SMU-K44/-K65 1161.0566.02, 1415.0053.02 © 2012 Rohde & Schwarz GmbH & Co. KG Muehldorfstr. 15, 81671 Munich, Germany Phone: +49 89 41 29 - 0 Fax: +49 89 41 29 12 164 E-mail: info@rohde-schwarz.com Internet: http://www.rohde-schwarz.com Subject to change – Data without tolerance limits is not binding.
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Basic Safety Instructions Electrical safety If the information on electrical safety is not observed either at all to the extent necessary, electric shock, fire and/or serious personal injury or death may occur. 1. Prior to switching on the product, always ensure that the nominal voltage setting on the product matches the nominal voltage of the AC supply network. If a different voltage is to be set, the power fuse of the product may have to be changed accordingly. 2.
Basic Safety Instructions 14. Use suitable overvoltage protection to ensure that no overvoltage (such as that caused by a bolt of lightning) can reach the product. Otherwise, the person operating the product will be exposed to the danger of an electric shock. 15. Any object that is not designed to be placed in the openings of the housing must not be used for this purpose. Doing so can cause short circuits inside the product and/or electric shocks, fire or injuries. 16.
Basic Safety Instructions Repair and service 1. The product may be opened only by authorized, specially trained personnel. Before any work is performed on the product or before the product is opened, it must be disconnected from the AC supply network. Otherwise, personnel will be exposed to the risk of an electric shock. 2. Adjustments, replacement of parts, maintenance and repair may be performed only by electrical experts authorized by Rohde & Schwarz.
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Informaciones elementales de seguridad 12. Si un producto se instala en un lugar fijo, se deberá primero conectar el conductor de protección fijo con el conductor de protección del producto antes de hacer cualquier otra conexión. La instalación y la conexión deberán ser efectuadas por un electricista especializado. 13.
Informaciones elementales de seguridad 5. Ciertos productos, como p. ej. las instalaciones de radiocomunicación RF, pueden a causa de su función natural, emitir una radiación electromagnética aumentada. Deben tomarse todas las medidas necesarias para la protección de las mujeres embarazadas. También las personas con marcapasos pueden correr peligro a causa de la radiación electromagnética.
Informaciones elementales de seguridad 6. En caso de falta de estanqueidad de una celda, el líquido vertido no debe entrar en contacto con la piel ni los ojos. Si se produce contacto, lavar con agua abundante la zona afectada y avisar a un médico. 7. En caso de cambio o recarga inadecuados, las celdas o baterías que contienen electrolitos alcalinos (p. ej. las celdas de litio) pueden explotar.
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GPS and Assisted GPS Contents Contents 1 Preface....................................................................................................7 1.1 Documentation Overview.............................................................................................7 1.2 Typographical Conventions.........................................................................................8 2 Introduction............................................................................................9 2.
GPS and Assisted GPS Contents 2.8.4 Generating GPS Signal with Satellite Handover (Localization Mode Auto SV Selection and Update)..................................................................................................................21 2.8.5 Generating A-GPS Custom Build Scenarios (Localization Mode Full Configuration) ......................................................................................................................................22 2.8.6 Generating A-GPS Test Signal..
GPS and Assisted GPS Contents 4.8 Clock Settings...........................................................................................................142 4.9 Filter Settings............................................................................................................144 List of Commands..............................................................................145 Index....................................................................................................
GPS and Assisted GPS Preface Documentation Overview 1 Preface 1.1 Documentation Overview The user documentation for the R&S Signal Generator consists of the following parts: ● Online Help system on the instrument, ● "Quick Start Guide" printed manual, ● Documentation CD-ROM with: – Online help system (*.chm) as a standalone help, – Operating Manuals for base unit and options, – Service Manual, – Data sheet and specifications, – Links to useful sites on the R&S internet.
GPS and Assisted GPS Preface Typographical Conventions Service Manual The Service Manual is available in PDF format - in printable form - on the Documentation CD-ROM delivered with the instrument. It describes how to check compliance with rated specifications, on instrument function, repair, troubleshooting and fault elimination. It contains all information required for repairing the instrument by the replacement of modules.
GPS and Assisted GPS Introduction GPS system parameters 2 Introduction The R&S Signal Generator provides you with the ability to generate signals of up to four Global Positioning System (GPS) satellites per baseband path. An instrument equipped with two-path is able to generate the GPS signal of eight satellites. Signal generation is done in real-time and thus it is not limited to a certain time period.
GPS and Assisted GPS Introduction Assisted GPS (A-GPS) C/A codes 1 to 37 selectable, 1023 chips per C/A code Modulation BPSK (C/A code, P-code) QPSK (C/A code and P-code) Information data rate (navigation message) 50 Hz Frame structure of navigation data 25 frames consisting of 5 subframes where 1 subframe consists of 10 words, 1 word consists of 30 data bits, 1 data bit consists of 20460 C/A code chips. 2.
GPS and Assisted GPS Introduction Use of navigation data 2.3 Use of navigation data The C/A code used is fundamental to the simulation of GPS signals. The C/A code specifies the satellites to be simulated. Real navigation data (the almanac) contains the information about the currently valid space vechicle IDs. When using real navigation data, only valid SV IDs can be selected in the operating menu. When using arbitrary data, the complete range of IDs, 1 to 37, is available.
GPS and Assisted GPS Introduction Functional Overview Option GPS (R&S-K44) 2.4.1 Real-time generation With the option GPS (R&S SMx/AMU-K44), up to four satellites per baseband can be simulated in real-time. In case of a two-path instrument equipped with two options GPS (R&S-K44), up to 8 real satellites can be simulated and controlled within one dialog. 2.4.
GPS and Assisted GPS Introduction Functional Overview Option GPS (R&S-K44) uploaded almanac. The user only needs to specify time and location; all other configurations are done automatically by the R&S Signal Generator. This assures the calculation of a realistic scenario with an optimal 4-satellite constellation i.e. minimum Position Dilution of Precision (PDOP). The generic workflow is described in chapter 2.8.
GPS and Assisted GPS Introduction Enhancements of Option Assisted GPS (R&S-K65) 2.4.6 Real-Time S.P.O.T. display The real-word situation of disappearance and re-appearance of satellites, as well as the dynamic display of several parameters like HDOP, PDOP, receiver's location, elapsed time and the trajectory of a moving receiver can be observed in real-time in the special "Real-Time S.P.O.T." (Satellites and Position Online Tracker) display. The displayed values are updated every 5 seconds.
GPS and Assisted GPS Introduction Enhancements of Option Assisted GPS (R&S-K65) ● 3GPP FDD Performance Test Scenario#3 (3GPP 34.108 v.8.0.0, 3GPP 34.171 v. 7.0.1) ● 3GPP2 Static Test Scenario (3GPP2 C.S0036-0 V1.0) ● 3GPP2 Moving Test Scenario (3GPP2 C.S0036-0 V1.0) The generic workflow is described in chapter 2.8.6, "Generating A-GPS Test Signal", on page 23. 2.5.3 Custom build scenarios The option Assisted GPS (R&S-K65) is not limited to be used for A-GPS testing exclusively.
GPS and Assisted GPS Introduction Moving Scenarios 2.6 Moving Scenarios As it is part of the A-GPS test scenarios for 3GPP FDD and GSM (Performance Test Scenario#3), the option Assisted GPS (R&S-K65) enhances the option GPS (R&S-K44) by user-definable moving scenarios, which can also be used for testing stand-alone GPSreceivers. The user has the possibility to define a movement by means of a so-called "waypoint" file, which will lead to a "moving" of the connected GPS-receiver. 2.6.
GPS and Assisted GPS Introduction Moving Scenarios Command Description ARC: E, N, Angle Specifies a 2-Dimensional ARC (East, North) with the first two arguments representing the center of the ARC (m) in the Cartesian basis. The last argument specifies the angle in degrees (°) of the Arc Starting the "current location". Angle sign is significant since it indicates positive direction (against clock movement) or negative direction (same as clock movement).
GPS and Assisted GPS Introduction Moving Scenarios Fig. 2-1: Moving Scenario Movement Description ****************************** MOVEMENT FILE ****************************** %%!! All empty lines or statements starting with %% will be ignored %%This file format is used to load a continuous movement File into the SMU %% Enter the WGS-84 Reference Point's Coordinates S REFERENCE: 144.96667027777777777777777777777777,-7.
GPS and Assisted GPS Introduction Test Setups LINE: 0, -250, 1.44675925925925925926 LINE: 0, -400, 0 LINE: 0, -250, -1.44675925925925925926 ARC: 1400, 20, -90 LINE: -250, 0, 1.44675925925925925926 LINE: -900, 0, 0 LINE: -250, 0, -1.44675925925925925926 %%End of Trajectory description 2.7 Test Setups 2.7.1 Example of A-GPS Test Setup 2.
GPS and Assisted GPS Introduction Typical Workflows 1. Execute "Set To Default" to adjust the instrument's settings to a standard set of operating conditions. 2. Select the required "RF Band". 3. Adjust the output frequency of the instrument to the frequency selected with the parameter "RF Band": a) for RF instruments, select "Set to Default RF and Level" or b) select the FREQ key to set the frequency in the header of the instrument. 4. Set the parameters "Simulation Mode" to "Generic Mode". 5.
GPS and Assisted GPS Introduction Typical Workflows Enable this mode, if a simulation of realistic GPS scenario of up to 4 configurable GPS satellites per baseband and flexible simulation time is required. The signal will be calculated for the selected fixed or moving location. Simulation of moving receiver requires option Assisted GPS R&S SMx/AMU-K65. 1. Execute "Set To Default" to adjust the instrument's settings to a standard set of operating conditions. 2. Select the required "RF Band". 3.
GPS and Assisted GPS Introduction Typical Workflows Enable this mode, if a simulation of realistic GPS scenario of up to 4 configurable GPS satellites per baseband with satellite handover is required. The signal will be calculated for the selected fixed or moving location. Simulation of moving receiver requires option Assisted GPS R&S-K65. 1. Execute "Set To Default" to adjust the instrument's settings to a standard set of operating conditions. 2. Select the required "RF Band". 3.
GPS and Assisted GPS Introduction Typical Workflows 2. Enable the instrument to work in "Localization Mode Auto SV Selection". Note: Do not use the "Auto SV Selection and Update" mode for the generation of AGPS test signals. 3. Select "Full Configuration" mode. 4. Select the "Satellite Configuration" and reconfigure the satellites' parameters as required. 5. Configure the "Navigation Message" and for instance adjust the ionospheric model per satellite. 6.
GPS and Assisted GPS Introduction Typical Workflows 5. "Synchronize" the Assistance Data (Satellite Configurations and Reference Location Configuration) with the settings that have been already made. 6. Select the "Number of Satellites" and the Satellites IDs ("SV ID") for which assistance data is to be generated. 7. Reconfigure the reference location (i.e. BS location instead of receiver location). 8. Enter the "Time", "Duration" and "Resolution of Assistance Data". 9.
GPS and Assisted GPS Introduction Typical Workflows 2.8.9 Loading and Processing an GPS Waveform in the ARB of R&S Signal Generator The generic workflow for loading and processing of GPS waveform is as follow: 1. Enable the R&S WinIQSIM2 to generate a one-satellite static generic GPS signal with constant Doppler shift and generate a waveform file. 2. Connect the R&S WinIQSIM2 to the R&S Signal Generator. 3. Transfer the waveform file. For detailed description, refer to the WinIQSIM2 Software Manual. 4.
GPS and Assisted GPS User Interface 3 User Interface To access the dialog for setting the GPS digital standard, select "Baseband block > Satellite Navigation > GPS" or use the MENU key under "Baseband". The dialog is split into several sections for configuring the standard. The choice of simulation mode determines which displays and parameters are made available in the lower section.
GPS and Assisted GPS User Interface GPS Main Dialog The button in the lower section leads to the submenu for configuring the satellite signals. Additional buttons lead to dialogs for generating the assistance data and displaying the "Real-Time S.P.O.T.". 3.1 GPS Main Dialog 3.1.1 General Settings for GPS Simulation The upper section of the menu is where the GPS digital standard is enabled, the default settings are called. Buttons lead to the submenus for loading and saving the GPS configuration.
GPS and Assisted GPS User Interface GPS Main Dialog Note: For instruments with RF Output, the RF and level are preset with button "Set to default RF and Level".
GPS and Assisted GPS User Interface GPS Main Dialog "File Manager" Calls the "File Manager". The "File Manager" is used to copy, delete and rename files and to create new directories. SCPI command: [:SOURce]:BB:GPS:SETTing:CATalog on page 82 [:SOURce]:BB:GPS:SETTing:LOAD on page 82 [:SOURce]:BB:GPS:SETTing:STORe on page 83 [:SOURce]:BB:GPS:SETTing:DELete on page 82 Data List Management Calls the "Data List Management" menu.
GPS and Assisted GPS User Interface GPS Main Dialog The file name is entered in the submenu. The file is stored with the predefined file extension *.wv. The file name and the directory it is stored in are user-definable. See also section chapter 2.8.8, "Generating an one-satellite static generic GPS signal with R&S WinIQSIM2", on page 24, and chapter 2.8.9, "Loading and Processing an GPS Waveform in the ARB of R&S Signal Generator", on page 25.
GPS and Assisted GPS User Interface GPS Main Dialog "GSM" One of the following predefined A-GPS GSM test scenarios can be selected: ● GSM Signalling Scenario (3GPP TS 51.010-1 v.7.7.0) ● GSM Performance Test Scenario 1 (3GPP TS 51.010-1 v.7.7.0) ● GSM Performance Test Scenario 2 (3GPP TS 51.010-1 v.7.7.0) ● GSM Performance Test Scenario 3 (3GPP TS 51.010-1 v.7.7.0) All parameters (simulated position, satellite configuration, Almanac, navigation data, etc.
GPS and Assisted GPS User Interface GPS Main Dialog "ON" The signal of baseband B is routed to baseband A. A total number of eight satellites can be configured simultaneously. Both basebands are automatically set to trigger mode "Armed Retrigger" and a trigger event has to be performed to start the signal generation. Changing of any parameter restarts the signal generation in both paths. "OFF" Corresponds to normal operation, i.e. independent configuration of both paths.
GPS and Assisted GPS User Interface GPS Main Dialog Sets the localization mode. "Auto SV Selection" Four satellites per baseband will be selected depending on the selected almanac. For instruments equipped with two-paths, a total number of eight satellites will be selected. The ephemerides are read out of the almanac and displayed in the Navigation Message Configuration dialog. See also chapter 2.8.
GPS and Assisted GPS User Interface GPS Main Dialog Clock Calls the menu for selecting the clock source and for setting a delay (see chapter 3.6.4, "Clock Settings", on page 70). SCPI command: n.a. 3.1.2 Localization Data (R&S SMx/AMU instruments only) The "Localization Mode" menu section is where the satellites signal are configured corresponding to a 'real' location which can be selected by the user. Geographic Location Selects the geographic location of the GPS receiver.
GPS and Assisted GPS User Interface GPS Main Dialog The receiver trajectory can be observed in the "Map View" on the Real-Time S.P.O.T. display. "Cyclic" The waypoint file is read out cyclic. Using this read out mode is only recommended for waypoint files that describe a circle moving scenario or moving scenario in which the start and the end point are close to each other. "One Way" The file is read out only once.
GPS and Assisted GPS User Interface GPS Main Dialog Longitude Sets the longitude of the user defined geographic location. This field is only configurable for user defined geographic locations. If a value other than "User Defined" is selected in the "Geographic Location" field, the "Longitude" field is read only.
GPS and Assisted GPS User Interface GPS Main Dialog "PRBSxx/Data List/Pattern" Arbitrary data can be used for basic tests on the GPS signals. Arbitrary data are supported only in "Generic" mode. Data sources "PN9", "PN11", "PN15", "PN16", "PN20", "PN21", "PN23", "ALL0", "ALL1", and "Pattern" are all available. If the "Pattern" data type is used, the bit pattern is defined in the "Pattern" input box. The length is limited to 64 bits.
GPS and Assisted GPS User Interface GPS Main Dialog In "Full Configuration" mode, however, the simulation time is not limited to the almanac week. The indication is only available if data source "Real Navigation Data" is selected.
GPS and Assisted GPS User Interface Satellite Configuration (enabled for "Localization" mode) Sets the satellite's elevation, i.e. determines the minimum angular distance of a satellite above the horizon. When the elevation decreases below the selected elevation mask, the GPS satellite is considered as invisible and hence the GPS receiver can not use this satellite for determining its position. The GPS receiver has to search for another satellite with better visibility. This process is called handover.
GPS and Assisted GPS User Interface Satellite Configuration Configuration of eight satellites is only possible for two path instruments and enabled by parameter "Use Baseband A+B". Adjust Total Power to 0dB (R&S SMx/AMU instruments only) Sets the power level of each satellite so that the sum of all levels results in 0 dB relative to the global level setting of the instrument. The power ratio among the individual satellites is maintained.
GPS and Assisted GPS User Interface Satellite Configuration Activates/deactivates spreading. When spreading is deactivated the pure navigation data is modulated onto the RF carrier. SCPI command: [:SOURce]:BB:GPS:SPReading[:STATe] on page 98 Initial HDOP (R&S SMx/AMU instruments only) Displays the HDOP (Horizontal Dilution of Precision) of the selected satellite constellation at the beginning of the simulation. The displayed HDOP value is not updated.
GPS and Assisted GPS User Interface Satellite Configuration The C/A code (f_ca = 1.023 MHz) is provided for civilian purposes. The P-code (f_p = 10.23 MHz) is provided for military purposes. They are used as spreading codes for the navigation data which is transmitted at a rate of 50 baud. Note: For satellite 2, 3, and 4, the only available Ranging Code is C/A and cannot be changed. "C/A" Carrier L1 (f_L1= 1.57542 GHz) respectivelly carrier L2 (f_L2 = 1.2276 GHz) is modulated by C/A-code (BPSK).
GPS and Assisted GPS User Interface Satellite Configuration Time Shift ms (R&S SMx/AMU instruments only) Indicates the time shift of the code sequence in milliseconds. SCPI command: [:SOURce]:BB:GPS:SVID:TSSeconds on page 100 Power (R&S SMx/AMU instruments only) Sets the power offset of the satellite in dB. The offset determines the power ratio of the activated satellites.
GPS and Assisted GPS User Interface Satellite Configuration The displayed value is not updated but the elevation of each satellite is constantly monitored. Decreasing the satellite's elevation below the selected elevation mask value is one of the reasons for satellite handover. Thus, a change of the satellite constellation can occur before the initially calculated time elapses. The expected time of each upcoming handover is displayed in the "Real-Time S.P.O.T.
GPS and Assisted GPS User Interface Satellite Configuration Initial Carrier Phase /rad (R&S SMx/AMU instruments only) Sets the initial carrier phase. Additionally, the parameter is used in case of multipath simulation. SCPI command: [:SOURce]:BB:GPS:SATellite:ICPHase on page 96 Resulting Frequency Indicates the currently valid values for Doppler-shifted carrier frequency.
GPS and Assisted GPS User Interface Navigation Message Configuration where fL1=1,575420GHz and fL2=1,2276MHz as set with parameter RF Band and fP is fixed to 10.230 MHz. SCPI command: [:SOURce]:BB:GPS:SATellite:PCRate on page 96 3.3 Navigation Message Configuration The "Navigation Message Configuration" dialog is enabled only for "Localization" mode set to "Full Configuration".
GPS and Assisted GPS User Interface Navigation Message Configuration Operating Manual 1171.5248.
GPS and Assisted GPS User Interface Navigation Message Configuration Set To Almanac This button is only enabled for Localization mode "Full Configuration". The navigation message's parameters will be calculated according to the selected almanac. Using this option as basis for further reconfigurations is recommended.
GPS and Assisted GPS User Interface Navigation Message Configuration Table 3-1: Ephemeris Parameters Parameter Descritpion SCPI command Code on L2 Type of code for L2; This value does not have [:SOURce]:BB:GPS:SVID: any impact on the actual used ranging code of NMESsage:CLTMode on page 105 the generated satellite. The used "Ranging Code" is set in the "Satellite Configuration" menu. "Reserved" ● Reserved for future use. "P Code ON" ● Carrier L2 (f_L2= 1.
GPS and Assisted GPS User Interface Navigation Message Configuration Parameter Descritpion SCPI command i_0 Inclination Angle at Reference Time (1) [:SOURce]:BB:GPS:SVID: NMESsage:IZERo on page 109 Omega Argument of Perigee (1) [:SOURce]:BB:GPS:SVID: NMESsage:OMEGa on page 111 OMEGA_DOT Rate of Right Ascension (1) [:SOURce]:BB:GPS:SVID: NMESsage:ODOT on page 111 IDOT Rate of Inclination Angle (1) [:SOURce]:BB:GPS:SVID: NMESsage:I
GPS and Assisted GPS User Interface Navigation Message Configuration Table 3-2: Clock Correction Parameters Parameter Description SCPI command T_GD L1-L2 Correction Term (1) [:SOURce]:BB:GPS:SVID: NMESsage:TGD on page 113 t_OC Clock Correction Parameter (1) [:SOURce]:BB:GPS:SVID: NMESsage:TOC on page 114 a_f2 [:SOURce]:BB:GPS:SVID: NMESsage:AFTWo on page 102 a_f1 a_f0 [:SOURce]:BB:GPS:SVID: NMESsage:AFONe on page 101 [:SOURce
GPS and Assisted GPS User Interface Assistance Data Generation Changing the ionospheric model has an impact on the satellite's parameters "Time Shift", "Doppler Shift" and "Duration (Elevation>2.5/5/7.5/10°)". Parameter Description SCPI Command "alpha_0 .. alpha_3" Displays the parameter alpha_0 .. alpha_3 of [ :SOURce]:BB:GPS: the satellite's navigation message. SVID:NMESsage: ALPHa on page 102 "beta_0 .. beta_3" Displays the parameter beta_0 ..
GPS and Assisted GPS User Interface Assistance Data Generation The lower part of the menu offers assistance in the generation of the "Almanac", "Ionospheric", "Navigation", "UTC" and "Acquisition" files. Synchronize Synchronizes the parameters of the satellites configuration and of the reference location configuration blocks as well as the parameter "Time of Assistance Data" with the settings made in the "Satellite Configuration" dialog and in the Main Dialog.
GPS and Assisted GPS User Interface Assistance Data Generation Altitude (Assistance Data Generation) Sets the geographic altitude of the reference location in meters above sea level. SCPI command: [:SOURce]:BB:GPS:ADGeneration:LOCation:ALTitude on page 120 Latitude (Assistance Data Generation) Sets the latitude of the reference location.
GPS and Assisted GPS User Interface Assistance Data Generation Duration of Assistance Data Sets the duration (in seconds) of the GPS Assistance Data. SCPI command: [:SOURce]:BB:GPS:ADGeneration:DURation on page 119 Resolution of Assistance Data Sets the resolution (in seconds) of the GPS Assistance Data. SCPI command: [:SOURce]:BB:GPS:ADGeneration:RESolution on page 124 Generate Almanac File … Opens the "Generate Almanac File" window for saving the generated Almanac File.
GPS and Assisted GPS User Interface Assistance Data Generation Opens the "Select Ionospheric File" window for saving the generated ionospheric model. The name of the file is specified in the "File name" entry field. To save the file, press the "Save" button. The generated ionospheric file is file with extension .rs_ion. The parameters listed in this file (see table below) are according to the parameters used for describing the near satellite ionospheric model "Klobuchar".
GPS and Assisted GPS User Interface Assistance Data Generation Parameter Unit SV Health boolean IODC - L2 P Data Flag boolean SF 1 Reserved - TGD sec toc sec af2 sec/sec2 af1 sec/sec af0 sec Crs meters delta_n semi-circles/sec M0 semi-circles CUC radians e - CUS radians (A)1/2 meters1/2 Toe sec Fit Interval Flag boolean AODO sec CIs radians I0 semi-circles Crc meters omega semi-circles OMEGAdot semi-circles/sec Idot semi-circles/sec The generated navigat
GPS and Assisted GPS User Interface Assistance Data Generation Generate UTC File … (enabled with option Assisted GPS (R&S-K65) only) Opens the "Select UTC" File window for saving the generated UTC file. The name of the file is specified in the "File name" entry field. To save the file, press the "Save" button. The generated UTC file is a file with extension .rs_utc.
GPS and Assisted GPS User Interface Real-Time S.P.O.T. Parameter Unit Code Phase Search Window chips Azimuth deg Elevation deg See chapter 2.8.7, "Generating Assistance Data", on page 23 for description of the workflow for generation of assistance data. SCPI command: [:SOURce]:BB:GPS:ADGeneration:ACQuisition:CREate on page 118 3.5 Real-Time S.P.O.T. The "Real-Time S.P.O.T." display is available for R&S SMx/AMU instrument only. The "Real-Time S.P.O.T.
GPS and Assisted GPS User Interface Real-Time S.P.O.T. The "Sky View" section displays the current position and state (active or inactive) of the satellites. When "Auto SV Selection and Update" mode is selected, the real-word situation of disappearance and re-appearance of satellites can be observed. The "Real-Time S.P.O.T." display is updated every 5 second and a special dynamic time tuning algorithm is used to optimize the presentation of the "Map View" display.
GPS and Assisted GPS User Interface Real-Time S.P.O.T. 3.5.1 Real-Time Information The "Real-Time Information" section provides dynamic real-time information about several parameters like "HDOP", "PDOP", "Receiver Location", "Elapsed Time" and "Time of Simulation". Elapsed Time Displays the time elapsed form the beginning of the simulation. The value is displayed in second and is updated every 5 sec. SCPI command: n.a. Time Of Simulation Displays the current time of the simulation.
GPS and Assisted GPS User Interface Real-Time S.P.O.T.
GPS and Assisted GPS User Interface Trigger/Marker/Clock Settings The Position Format selected heir changes the format theReceiver Location is displayed. "DEG:MIN:SE C" The display format is Degree:Minute:Second and Direction, i.e. XX°XX'XX.XX" Direction, where Direction can be North/South and East/West. "Decimal Degree" The display format is decimal degree, i.e. +/-XX.XXXXX°, where "+" indicates North and East and "-" indicates South and West. SCPI command: n.a. Latitude (S.P.O.T.
GPS and Assisted GPS User Interface Trigger/Marker/Clock Settings The "Trigger In" section is where the trigger for the signal is set. Various parameters will be provided for the settings, depending on which trigger source - internal or external - is selected. The current status of signal generation ("Running" or "Stopped") is indicated for all trigger modes. The "Marker Mode" section is where the marker signals at the MARKER output connectors are configured.
GPS and Assisted GPS User Interface Trigger/Marker/Clock Settings 3.6.1 Trigger In The trigger functions are available for R&S SMx and R&S AMU instruments only. The "Trigger In" section is where the trigger for the signal is set. Various parameters will be provided for the settings, depending on which trigger source - internal or external - is selected. The current status of signal generation ("Running" or "Stopped") is indicated for all trigger modes. Trigger Mode Selects trigger mode.
GPS and Assisted GPS User Interface Trigger/Marker/Clock Settings Signal Duration Defines the length of the signal sequence to be output in the "Single" trigger mode. It is possible to output deliberately just part of the signal, an exact sequence of the signal, or a defined number of repetitions of the signal. SCPI command: [:SOURce]:BB:GPS:TRIGger:SLENgth on page 135 Running/Stopped Displays the status of signal generation for all trigger modes.
GPS and Assisted GPS User Interface Trigger/Marker/Clock Settings "External (TRIGGER 1 / 2)" The trigger event is executed with the aid of the active edge of an external trigger signal. The trigger signal is supplied via the TRIGGER connector. The polarity, the trigger threshold and the input impedance of the TRIGGER input can be set in the "Global Trigger/Clock Settings" dialog. SCPI command: [:SOURce]:BB:GPS:TRIGger:SOURce on page 135 Sync.
GPS and Assisted GPS User Interface Trigger/Marker/Clock Settings Trigger Delay Sets the trigger signal delay in samples on external triggering or on internal triggering via the second path. Sets the trigger signal delay in samples on external triggering. This enables the R&S Signal Generator to be synchronized with the device under test or other external devices. For two-path instruments, the delay can be set separately for each of the two paths.
GPS and Assisted GPS User Interface Trigger/Marker/Clock Settings "1PP2S" A marker signal is generated for every second start of second (GPS time). The "Pulse Width" is set in the corresponding field. The input is expressed as a number of chips. While generating an offline GPS signal with R&S WinIQSIM2, this marker signal is only enabled, if the "Doppler Shift" is set to 0.
GPS and Assisted GPS User Interface Trigger/Marker/Clock Settings Marker x Delay Enters the delay between the marker signal at the marker outputs and the start of the frame or slot. The input is expressed as a number of symbols/samples. If the setting "Fix marker delay to dynamic range" is enabled, the setting range is restricted to the dynamic range. In this range the delay of the marker signals can be set without restarting the marker and signal.
GPS and Assisted GPS User Interface Trigger/Marker/Clock Settings "Chip" A chip clock is supplied via the CLOCK connector. "Multiple" A multiple of the chip clock is supplied via the CLOCK connector; the chip clock is derived internally from this. The "Multiplier" window provided allows the multiplication factor to be entered. SCPI command: [:SOURce]:BB:GPS:CLOCk:MODE on page 142 Clock Multiplier Enters the multiplication factor for clock type "Multiple".
GPS and Assisted GPS Remote-Control Commands Primary Settings 4 Remote-Control Commands The SOURce:BB:GPS subsystem contains commands for the primary and general settings of the GPS standard. These settings concern activation and deactivation of the standard, setting the filter, clock, trigger and clipping settings and the sequence length, as well as the preset setting.
GPS and Assisted GPS Remote-Control Commands Primary Settings [:SOURce]:BB:GPS:RFBand.....................................................................................81 [:SOURce]:BB:GPS:SEMask.....................................................................................81 [:SOURce]:BB:GPS:SETTing:CATalog.......................................................................82 [:SOURce]:BB:GPS:SETTing:DELete...................................................
GPS and Assisted GPS Remote-Control Commands Primary Settings Parameters: USER | GSMSIG | GSMPER1 | GSMPER2 | GSMPER3 | W3GSIG | W3GPER1 | W3GPER2 | W3GPER3 | W3G2S | W3G2M User No predefined test scenario is selected. GSMSIG Predefined A-GPS GSM Signalling Scenario (3GPP TS 51.010-1 v.7.7.0) GSMPER1 Predefined A-GPS GSM Performance Test Scenario 1 (3GPP TS 51.010-1 v.7.7.0) GSMPER2 Predefined A-GPS GSM Performance Test Scenario 2 (3GPP TS 51.010-1 v.7.7.
GPS and Assisted GPS Remote-Control Commands Primary Settings Determines the duration of the satellite simulation. The resulting duration of the simulation is calculated as follow: Duration of Simulation = [Duration of Satellite Simulation /(1±Doppler Shift/FL1orL2) where FL1 or L2 is the frequency selected with the command BB:GPS:RFB. The maximum duration depends on the Oversampling factor (BB:GPS:FILT:OSAM) and the ARB memory size of the connected instrument.
GPS and Assisted GPS Remote-Control Commands Primary Settings Parameters: AUTO | AUPDate | FULL AUTO Eight satellites will be selected depending on the selected almanac. The ephemerides are read out of the almanac and displayed in the Navigation Message Configuration menu. Note: The ephemerides are not automatically updated. There should be less than two hours between the simulation and the TOA (Time of Almanac).
GPS and Assisted GPS Remote-Control Commands Primary Settings This parameter is configurable only for user defined geographic locations. If a value other than "User Defined" is set for the "Geographic Location", the parameter "Altitude" is read only. Parameters: float Range: -10000.0 to 10000.0 Increment: 0.1m *RST: 0.0 Example: BB:GPS:LOC ALT 500 sets the geographic altitude to 500 m.
GPS and Assisted GPS Remote-Control Commands Primary Settings Example: BB:GPS:LOC:LAT:DIR NORT sets the direction of the geographic location to NORTh. [:SOURce]:BB:GPS:LOCation:LATitude:MINutes (R&S SMx/AMU instruments only) Sets the latitude of the geographic location in ’ (minutes). Parameters: float Range: *RST: Example: 0.0 to 59.0 0.0 BB:GPS:LOC:LAT:MIN 9 sets the latitude of the geographic location to 9’.
GPS and Assisted GPS Remote-Control Commands Primary Settings Parameters: float Range: *RST: Example: 0.0 to 180.0 0.0 BB:GPS:LOC:LONG:DEGR 11 sets the longitude of the geographic location to 11° (degrees). [:SOURce]:BB:GPS:LOCation:LONGitude:DIRection (R&S SMx/AMU instruments only) Sets the direction of the geographic location related to the longitude.
GPS and Assisted GPS Remote-Control Commands Primary Settings Sets the format in which the Latitude and Longitude are displayed. According to this parameter, the position can be specified in "DEG:MIN:SEC" or in "Decimal Degree" format. Parameters: DMS | DECimal DMS The position is specified in DEG:MIN:SEC. DECimal The position is specified in decimal degree, i.e. +/-XX.XXXXX°, where "+" indicates North and East and "-" indicates South and West.
GPS and Assisted GPS Remote-Control Commands Primary Settings Example: BB:GPS:LOC:WAYP "D:\waypoints.txt" selects the waypoint file [:SOURce]:BB:GPS:PRESet Produces a standardized default for all GPS settings. The settings correspond to the *RST values specified for the commands. Example: BB:GPS:PRES resets all the GPS settings to default values. Usage: Event [:SOURce]:BB:GPS:PRFLevel (R&S SMx instruments only) Sets the RF to GPS standard L1 (1.575420 GHz) and the power level to -115.
GPS and Assisted GPS Remote-Control Commands Primary Settings Parameters: 2.5 | 5 | 7.5 | 10 (only for instruments working in a coupling mode) *RST: Example: 7.5 BB:GPS:BAB:STAT ON enables control of both paths via the GPS menu of path A. 8 Satellites can be configured. BB:GPS:SEM 10 sets the satellite eleation mask. [:SOURce]:BB:GPS:SETTing:CATalog? Reads out the files with GPS settings in the default directory. The default directory is set using command MMEM:CDIRectory.
GPS and Assisted GPS Remote-Control Commands Primary Settings Setting parameters: string Example: BB:GPS:SETT:LOAD 'gps' loads file gps. Usage: Setting only [:SOURce]:BB:GPS:SETTing:STORe Stores the current GPS settings into the selected file. The directory is set using command MMEM:CDIRectory. A path can also be specified, in which case the files in the specified directory are read. Only the file name has to be entered.
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings Activating this standard deactivates all the other digital standards and digital modulation modes in the same path. Note: For two path instruments and enabled parameter "Use of Baseband A+B", enabling the GPS signal simulation will disable all other digital standards and digital modulation modes even in the path B.
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings [:SOURce]:BB:GPS:NAVigation:SIMulation[:BEGin]:DATE...........................................90 [:SOURce]:BB:GPS:NAVigation:SIMulation[:BEGin]:DAY.............................................90 [:SOURce]:BB:GPS:NAVigation:SIMulation[:BEGin]:HOUR..........................................91 [:SOURce]:BB:GPS:NAVigation:SIMulation[:BEGin]:MINute.................
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings [:SOURce]:BB:GPS:NAVigation:ALManac Selects the almanac providing the navigation information. Current almanac data can be downloaded via the Internet. The files are provided as text files (*.txt) or YUMA files. The almanac files provided with this option are saved in the default directory of the instrument (C:\Program Files\Rohde&Schwarz\SMUFirmware\Lists\Gps\Alma nac).
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings Example: BB:GPS:NAV:ALM:BEG:MONT? queries the start month of the GPS week. Response: 4 the week starts in April. Usage: Query only [:SOURce]:BB:GPS:NAVigation:ALManac:BEGin:WNUMber? Queries the GPS week number of the almanac. The command is only available if data source Real Navigation Data is selected (SOURce:BB:GPS:NAVigation:DATA RND).
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings Example: BB:GPS:NAV:ALM:END:DAY? queries the final day of the GPS week. Response: 19 the GPS week ends on the 19th of the month. Usage: Query only [:SOURce]:BB:GPS:NAVigation:ALManac:END:MONTh? Queries the final month of the week in which the almanac was published. The command is only available if data source Real Navigation Data is selected (SOURce:BB:GPS:NAVigation:DATA RND).
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings Example: BB:GPS:NAV:ALM:TOEP? queries the time of almanac. Response: 589824 the value is returned in seconds. Counting starts at 0.00 a.m. on Sunday of the GPS week. Usage: Query only [:SOURce]:BB:GPS:NAVigation:DATA Determines the data source for the navigation information. Note:Arbitrary data are supported only in "Generic" mode.
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings Parameters: Example: string BB:GPS:NAV:DATA DLIS selects the Data Lists data source. MMEM:CDIR 'D:\Lists' selects the directory for the data lists. BB:GPS:NAV:DATA:DLIS 'GPS_list1' selects file 'GPS_list1' as the data source. This file must be in the directory D:\Lists and have the file extension *.dm_iqd.
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings [:SOURce]:BB:GPS:NAVigation:SIMulation[:BEGin]:HOUR Sets the hour of the simulation start. The command is only available if data source Real Navigation Data is selected (SOURce:BB:GPS:NAV:DATA RND). Parameters: float Range: *RST: Example: 0 to 23 - BB:GPS:NAV:SIM:HOUR 10 sets the simulation start hour.
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings [:SOURce]:BB:GPS:NAVigation:SIMulation[:BEGin]:TIME
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings Example: BB:GPS:SMOD LOC satellite signals are generated corresponding to a 'real' location. BB:GPS:PDOP? queries the PDOP of the selected satellite constellation. Response: '2.80' Usage: Query only [:SOURce]:BB:GPS:POWer:ADJust (R&S SMx/AMU instruments only) Calculates the power level of each satellite so that the sum of all levels results in 0 dB.
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings Parameters: float Range: -100.0kHz to 100.0kHz Increment: 0.1Hz *RST: 0.0Hz Example: BB:GPS:SAT1:VID 4 sets space vehicle 4 for the first satellite. BB:GPS:SAT2:VID 4 sets space vehicle 4 for the second satellite. BB:GPS:SAT1:ADSH 10.5kHz sets the additional Doppler shift of satellite 1 to 10.
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings To simulate multipath, assign the same space vehicle (SV ID) to more than one simulated satellites and set different "Additional Time Shift". Suffix: . 1 .. 37 Parameters: float Range: 0 to 10.0e6 Increment: 0.001 *RST: 0.0 Example: BB:GPS:SAT1:VID 4 sets space vehicle 4 for the first satellite. BB:GPS:SAT2:VID 4 sets space vehicle 4 for the second satellite.
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings Usage: Query only [:SOURce]:BB:GPS:SATellite:ICPHase (R&S SMx/AMU instruments only) Sets the initial carrier phase in radians. Additionally, the parameter can be used to simulate multipath conditions. Suffix: . 1 .. 4 Parameters: float Range: 6.28 to 6.28 Increment: 0.01 radians Example: BB:GPS:SAT4:ICPH 3.14 sets the initial carrier phase of satellite 4.
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings Parameters: CACode | CAPCode | PCODe CACode Carrier L1 (f_L1= 1.57542 GHz) is modulated by C/A-code (BPSK). CAPCode (only available for Satellite 1) Carrier L1 (f_L1= 1.57542 GHz) is modulated by C/A code and Pcode (QPSK). PCODe (only available for Satellite 1) Carrier L1 (f_L1= 1.57542 GHz) is modulated by P-code (BPSK).
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings Example: BB:GPS:SAT1:VID 4 sets id 4 for the first satellite. [:SOURce]:BB:GPS:SPReading[:STATe] The command activates/deactivates spreading. When spreading is deactivated the pure navigation data is modulated onto the RF carrier. Note:This parameter is enabled only for "Generic" mode.
GPS and Assisted GPS Remote-Control Commands Satellites Configuration and Satellites Signal Settings Note: This parameter is enabled only for "Localization" Mode. Suffix: . 1 .. 8 Return values: float Example: BB:GPS:SMOD LOC satellite signals are generated corresponding to a 'real' location. BB:GPS:SVID2:DUR? queries the time the satellite's elevation will be higher then 2.5/5/7.5/10°.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration Parameters: float Range: 0 to 10 000 000 Increment: 0.0001 *RST: 0 Example: BB:GPS:SAT4:TSCH 100232 sets a time shift of 100232 oversampled CA chips. [:SOURce]:BB:GPS:SVID:TSSeconds? (R&S SMx/AMU instruments only) Queries the time shift of the code sequence in seconds. Suffix: . 1 .. 8 Return values: float Example: BB:GPS:SAT4:TSS? queries the time shift in seconds. Response: 0.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration [:SOURce]:BB:GPS:SVID:NMESsage:CRC........................................................105 [:SOURce]:BB:GPS:SVID:NMESsage:CRS........................................................106 [:SOURce]:BB:GPS:SVID:NMESsage:CUC........................................................106 [:SOURce]:BB:GPS:SVID:NMESsage:CUS........................................................
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration [:SOURce]:BB:GPS:SVID:NMESsage:AFTWo Sets the clock correction parameter a_f2 of the satellite's navigation message. As this parameter affects the satellite's clock correction, the value selected here also has an impact on the satellite's parameters "Time Shift", "Doppler Shift" and "Duration (Elevation>10°)". The value of these parameters will be updated automatically.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration Parameters: float Range: *RST: -128 to 127 0 Example: BB:GPS:LMOD FULL sets the "Localization" mode to "Full Configuration" BB:GPS:SVID5:NMES:ALPH0 100 sets the value of the ionospheric parameter alpha_0 Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:SVID:NMESsage:AODO Sets the parameter Age of Data Offset of the satellite's navigation message.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration Example: BB:GPS:LMOD FULL sets the Localization mode to Full Configuration BB:GPS:SVID5:NMES:AZER 10000 sets the value of the UTC parameter A0 Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:SVID:NMESsage:BETA Sets the parameter beta_0, beta_1, beta_2 and beta_3 of the satellite's navigation message.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration [:SOURce]:BB:GPS:SVID:NMESsage:CIS Sets the parameter Amplitude of the Sine Harmonic Correction Term to the Angle of Inclination of the satellite's navigation message. As this parameter affects the satellite's orbit, the value selected here also has an impact on the satellite's parameters "Time Shift", "Doppler Shift" and "Duration (Elevation>10°)". The value of these parameters will be updated automatically.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration As this parameter affects the satellite's orbit, the value selected here also has an impact on the satellite's parameters "Time Shift", "Doppler Shift" and "Duration (Elevation>10°)". The value of these parameters will be updated automatically.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration Example: BB:GPS:LMOD FULL sets the Localization mode to Full Configuration BB:GPS:SVID5:NMES:CUC 100 sets the value of the parameter C_uc Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:SVID:NMESsage:CUS Sets the parameter Amplitude of the Sine Harmonic Correction Term to the Argument of Latitude of the satellite's navigation message.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration Parameters: float Range: 0 to 4294967295 Example: BB:GPS:LMOD FULL sets the "Localization" mode to "Full Configuration" BB:GPS:SVID5:NMES:ECC 1000000 sets the value of the parameter e (Eccentricity) Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:SVID:NMESsage:FIFLag Sets the parameter curve-fit interval flag of the satellite's navigation message.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration Parameters: float Range: -8192 to 8191 Example: BB:GPS:LMOD FULL sets the "Localization" mode to "Full Configuration" BB:GPS:SVID5:NMES:IDOT 1000 sets the parameter IDOT Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:SVID:NMESsage:IODC Sets the parameter Issue of Data, Clock of the satellite's navigation message.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration Parameters: float Range: -2147483648 to 2147483647 Example: BB:GPS:LMOD FULL sets the Localization mode to Full Configuration BB:GPS:SVID5:NMES:IZER 100000 sets the parameter i_0 Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:SVID:NMESsage:LTPData Sets the parameter use of carrier L2 P data flag of the satellite's navigation message.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration As this parameter affects the satellite's orbit, the value selected here also has an impact on the satellite's parameters "Time Shift", "Doppler Shift" and "Duration (Elevation>10°)". The value of this parameters will be updated automatically.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration Example: BB:GPS:LMOD FULL sets the "Localization" mode to "Full Configuration" BB:GPS:SVID5:NMES:OMEG 100000 sets the parameter omega Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:SVID:NMESsage:OZERo Sets the parameter Longitude of Ascending Node of Orbit Plane at Weekly Epoch of the satellite's navigation message.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration Example: BB:GPS:LMOD FULL sets the "Localization" mode to "Full Configuration" BB:GPS:SVID5:NMES:RES3 100000 sets parameter SF1 Reserved 3 to 1000000 Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:SVID:NMESsage:SQRA Sets the parameter Square Root of the Semi-Major Axis of the satellite's navigation message.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration The value of this parameters will be updated automatically. Parameters: float Range: -128 to 127 Example: BB:GPS:LMOD FULL sets the Localization mode to Full Configuration BB:GPS:SVID5:NMES:TGD 100 sets parameter T_GD Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:SVID:NMESsage:TLS Sets the UTC parameter Δt_LS of the satellite's navigation message.
GPS and Assisted GPS Remote-Control Commands Navigation Message Configuration Parameters: float Range: 0 to 65535 Example: BB:GPS:LMOD FULL sets the "Localization" mode to "Full Configuration" BB:GPS:SVID5:NMES:TOC 100 sets parameter t_OC Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:SVID:NMESsage:TOE Sets the parameter Time of Ephemeris of the satellite's navigation message.
GPS and Assisted GPS Remote-Control Commands Assistance Data Settings Parameters: float Range: *RST: 0 to 15 0 Example: BB:GPS:LMOD FULL sets the Localization mode to Full Configuration BB:GPS:SVID5:NMES:URA 10 sets parameter SV accuracy/ URA index Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:SVID:NMESsage:WLSF Sets the UTC parameter WNLSF of the satellite's navigation message.
GPS and Assisted GPS Remote-Control Commands Assistance Data Settings The Assistance Data Settings are only configurable for instrument equipped with option Assisted GPS (R&S SMx/AMU-K65) and in "Full Configuration" localization mode. [:SOURce]:BB:GPS:ADGeneration:ACQuisition:BLOCk.............................................117 [:SOURce]:BB:GPS:ADGeneration:ACQuisition:CREate............................................118 [:SOURce]:BB:GPS:ADGeneration:ALManac:CREate......
GPS and Assisted GPS Remote-Control Commands Assistance Data Settings Return values: ,,,<1st order Doppler Term>,,,,,
GPS and Assisted GPS Remote-Control Commands Assistance Data Settings [:SOURce]:BB:GPS:ADGeneration:ALManac:CREate Stores the current assistance data settings into the selected almanac file. The directory is set using command MMEM:CDIRectory. A path can also be specified, in which case the files in the specified directory are read. Only the file name has to be entered. Assistance data settings are stored as almanac file with the specific file extensions *.rs_al or *.rs_yuma.
GPS and Assisted GPS Remote-Control Commands Assistance Data Settings Example: MMEM:CDIR 'D:\ionospheric_files' sets the default directory to D:\ionospheric_files BB:GPS:ADG:ALM:CRE 'ionospheric' stores the current settings into file ionospheric Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:ADGeneration:LOCation:ALTitude Sets the geographic altitude of the reference location in meters above sea level. Parameters: float Range: *RST: -10000.0 to 10000.
GPS and Assisted GPS Remote-Control Commands Assistance Data Settings [:SOURce]:BB:GPS:ADGeneration:LOCation:LATitude:DIRection Sets the direction of the geographic location related to the latitude.
GPS and Assisted GPS Remote-Control Commands Assistance Data Settings Example: BB:GPS:ADG:LOC:LONG 25.123456 sets the longitude to 25.123456 Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:ADGeneration:LOCation:LONGitude:DEGRees Sets the longitude (expressed as decimal degree) of the reference location. The decimal value is automatically converted into DEG:MIN:SEC format.
GPS and Assisted GPS Remote-Control Commands Assistance Data Settings Parameters: float Range: 0.0 to 59.999 Example: BB:GPS:ADG:LOC:LONG:SEC 15.123 sets the longitude of the geographic location to 30.123" Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:ADGeneration:LOCation:PFORmat Sets the format in which the Latitude and Longitude are displayed. According to this parameter, the position can be specified in "DEG:MIN:SEC" or in "Decimal Degree" format.
GPS and Assisted GPS Remote-Control Commands Assistance Data Settings Example: MMEM:CDIR 'D:\navigation_files' sets the default directory to D:\navigation_files BB:GPS:ADG:ALM:CRE 'navigation' stores the current settings into file navigation Usage: Setting only Options: R&S SMx/AMU-K65 [:SOURce]:BB:GPS:ADGeneration:RESolution Sets the resolution (in seconds) of the GPS Assistance Data. Parameters: float Range: *RST: 1.0e-3 to 5.
GPS and Assisted GPS Remote-Control Commands Assistance Data Settings Sets the week of the generated sensitivity assistance data. Range: Return values: 0 to 1023 string The R&S Signal Generator generates a sensitivity assistance message as a binary stream. The returned value of this query for a healthy satellite is a sequence of integer values. The first integer is the size of the message in bits to be returned.
GPS and Assisted GPS Remote-Control Commands Assistance Data Settings [:SOURce]:BB:GPS:ADGeneration:SCOunt Sets the Number of satellites for which the assistance data will be generate. Note: Configuration of eight satellites is only possible for two path instruments.
GPS and Assisted GPS Remote-Control Commands Real-Time S.P.O.T. Parameters: string Example: MMEM:CDIR 'D:\utc_files' sets the default directory to D:\utc_files BB:GPS:ADG:ALM:CRE 'utc' stores the current settings into file 'utc' Options: R&S SMx/AMU-K65 4.5 Real-Time S.P.O.T. [:SOURce]:BB:GPS:SPOT:NHOTime.......................................................................127 [:SOURce]:BB:GPS:RLOCation:ALTitude...........................................................
GPS and Assisted GPS Remote-Control Commands Real-Time S.P.O.T. Query parameters: Return values: Mandatory argument. Elapsed Time is the offset of time (in seconds) to the beginning of the simulation set with the command SOUR:BB:GPS:NAV:SIM:BEG:TIME. float Increment: 0.1 m Example: BB:GPS:RLOC:ALT? 1.2 queries the geographic altitude of a receiver with time offset of 1.2 sec.
GPS and Assisted GPS Remote-Control Commands Real-Time S.P.O.T. Example: BB:GPS:RLOC:LAT:DEGR? 1375 queries the receiver's latitude. Response: 7 Usage: Query only [:SOURce]:BB:GPS:RLOCation:LATitude:DIRection? Queries the current direction of the receiver's geographic location related to the latitude. Query parameters: Return values: Mandatory argument.
GPS and Assisted GPS Remote-Control Commands Real-Time S.P.O.T. Return values: float Example: BB:GPS:RLOC:LAT:SEC? 1275 queries the receiver's latitude. Response: 54.842 Usage: Query only [:SOURce]:BB:GPS:RLOCation:LONGitude? Queries the current longitude of the receiver's geographic location expressed as decimal degree. Query parameters: Return values: Mandatory argument.
GPS and Assisted GPS Remote-Control Commands Real-Time S.P.O.T. Query parameters: Return values: Mandatory argument. Elapsed Time is the offset of time (in seconds) to the beginning of the simulation set with the command [:SOURce]:BB:GPS:NAVigation:SIMulation[: BEGin]:TIME. EAST | WEST Example: BB:GPS:RLOC:LONG:DIR? 1375 queries the receiver's direction.
GPS and Assisted GPS Remote-Control Commands Trigger Settings 4.6 Trigger Settings The trigger settings are available for R&S SMx and R&S AMU instruments only. EXTernal The numeric suffix to EXTernal distinguishes between the external trigger via the TRIGGER 1 (suffix 1) and TRIGGER 2 (suffix 2) connector. [:SOURce]:BB:GPS:TRIGger:ARM:EXECute............................................................132 [:SOURce]:BB:GPS:TRIGger:EXECute........................................
GPS and Assisted GPS Remote-Control Commands Trigger Settings Example: BB:GPS:TRIG:SOUR INT sets internal triggering. BB:GPS:TRIG:SEQ ARET sets "Armed_Retrigger" mode, i.e. every trigger event causes signal generation to restart. BB:GPS:TRIG:EXEC executes a trigger, signal generation is started. BB:GPS:TRIG:ARM:EXEC signal generation is stopped. BB:GPS:TRIG:EXEC executes a trigger, signal generation is started again.
GPS and Assisted GPS Remote-Control Commands Trigger Settings Example: BB:GPS:TRIG:SOUR OBAS sets for path A the internal trigger executed by the trigger signal from the second path (path B). BB:GPS:TRIG:OBAS:DEL 50 sets a delay of 50 chips for the trigger. [:SOURce]:BB:GPS:TRIGger:OBASeband:INHibit Specifies the number of chips by which a restart is to be inhibited following a trigger event. Applies only for triggering by the second path (two-path instruments only).
GPS and Assisted GPS Remote-Control Commands Trigger Settings [:SOURce]:BB:GPS:TRIGger:SLENgth Defines the length of the signal sequence to be output in the "Single" trigger mode (SOUR:BB:GPS:SEQ SING). The unit of the entry is defined under "Signal Duration Unit". The maximum value for the sequence length depends on the selected unit. It is possible to output deliberately just part of the signal, an exact sequence of the signal, or a defined number of repetitions of the signal.
GPS and Assisted GPS Remote-Control Commands Trigger Settings Parameters: INTernal | EXTernal | BEXTernal | OBASeband INTernal Triggering is executed by means of the Trigger command SOURce:BB:GPS:TRIGger:EXECute or *TRG in the case of remote control and by means of Execute Trigger in the case of manual operation. EXTernal Triggering is executed by means of the signal on the TRIGGER 1 connector. BEXTernal Triggering is executed by means of the signal on the TRIGGER 2 connector.
GPS and Assisted GPS Remote-Control Commands Marker Settings Example: BB:GPS:TRIG:SOUR EXT selects an external trigger via the TRIGGER 1 connector. BB:GPS:TRIG:INH 200 sets a restart inhibit for 200 chips following a trigger event. [:SOURce]:BB:GPS[:TRIGger]:SEQuence Selects the trigger mode. Parameters: AUTO | RETRigger | AAUTo | ARETrigger | SINGle AUTO The modulation signal is generated continuously. RETRigger The modulation signal is generated continuously.
GPS and Assisted GPS Remote-Control Commands Marker Settings The marker delay settings are available for R&S SMx and R&S AMU instruments only. OUTPut The numeric suffix to OUTPut distinguishes between the available markers. [:SOURce]:BB:GPS:TRIGger:OUTPut:DELay:FIXed..................................................138 [:SOURce]:BB:GPS:TRIGger:OUTPut:DELay....................................................138 [:SOURce]:BB:GPS:TRIGger:OUTPut:DELay:MAXimum...
GPS and Assisted GPS Remote-Control Commands Marker Settings [:SOURce]:BB:GPS:TRIGger:OUTPut:DELay:MAXimum? Queries the maximum marker delay for setting :BB:GPS:TRIG:OUTP:DEL:FIX ON. Return values: float Example: BB:GPS:TRIG:OUTP:DEL:FIX ON restricts the marker signal delay setting range to the dynamic range. BB:GPS:TRIG:OUTP:DEL:MAX? queries the maximum of the dynamic range. Response: 2000 the maximum for the marker delay setting is 2000 chips.
GPS and Assisted GPS Remote-Control Commands Marker Settings Parameters: NBIT | WORD | SFRame | PULSe | PATTern | RATio | PPS | PP2S | TRIGger | DISabled NBIT A marker signal is generated for every navigation data bit (20460 C/A chips). WORD A marker signal is generated for every navigation data word (30 navigation bits). SFRame A marker signal is generated for every navigation subframe (corresponds to 10 words). PPS A marker signal is generated for every start of second (GPS time).
GPS and Assisted GPS Remote-Control Commands Marker Settings Parameters: float Range: 1 to 2^24 - 1 chips Increment: 1 chip *RST: 1 chip Example: BB:GPS:TRIG:OUTP2:OFFT 200 sets an OFF time of 200 chips for marker signal 2. [:SOURce]:BB:GPS:TRIGger:OUTPut:PATTern Defines the bit pattern used to generate the marker signal in the setting SOURce:BB:GPS:TRIGger:OUTPut:MODE PATTern. 0 is marker off, 1 is marker on.
GPS and Assisted GPS Remote-Control Commands Clock Settings Return values: float Example: BB:GPS:TRIG:OUTP2:PULS:DIV 2 sets the divider for the marker signal on output MARKER 2 to the value 2. BB:GPS:TRIG:OUTP2:MODE PULS enables the pulsed marker signal. BB:GPS:TRIG:OUTP2:PULS:FREQ? queries the pulse frequency of the marker signal. Response: 511511.038 the resulting pulse frequency is 511.511 kHz.
GPS and Assisted GPS Remote-Control Commands Clock Settings When MCHip is used, a multiple of the chip clock is supplied via the CLOCK connector and the chip clock is derived internally from this. The multiplier is entered with the command BB:GPS:CLOCk:MULTiplier. For two-path instruments, the only numerical suffix allowed for SOURce is 1, since the external clock source is permanently allocated to path A.
GPS and Assisted GPS Remote-Control Commands Filter Settings Parameters: INTernal | EXTernal | AINTernal INTernal The internal clock reference is used to generate the chip clock (1.023 MHz). EXTernal The external clock reference is supplied to the CLOCK connector. *RST: Example: INTernal BB:GPS:CLOC:SOUR EXT selects an external clock reference. The clock is supplied via the CLOCK connector. BB:GPS:CLOC:MODE CHIP specifies that a chip clock is supplied via the CLOCK connector. 4.
GPS and Assisted GPS List of Commands List of Commands [:SOURce]:BB:GPS:ADGeneration:ACQuisition:BLOCk......................................................................117 [:SOURce]:BB:GPS:ADGeneration:ACQuisition:CREate.....................................................................118 [:SOURce]:BB:GPS:ADGeneration:ALManac:CREate.........................................................................119 [:SOURce]:BB:GPS:ADGeneration:DURation...........
GPS and Assisted GPS List of Commands [:SOURce]:BB:GPS:LOCation:LONGitude:DIRection.............................................................................79 [:SOURce]:BB:GPS:LOCation:LONGitude:MINutes...............................................................................79 [:SOURce]:BB:GPS:LOCation:LONGitude:SEConds.............................................................................79 [:SOURce]:BB:GPS:LOCation:PFORmat.......................
GPS and Assisted GPS List of Commands [:SOURce]:BB:GPS:SATellite:ICPHase...........................................................................................96 [:SOURce]:BB:GPS:SATellite:PCRate.............................................................................................96 [:SOURce]:BB:GPS:SATellite:RCODe.............................................................................................
GPS and Assisted GPS List of Commands [:SOURce]:BB:GPS:SVID:NMESsage:SQRA................................................................................113 [:SOURce]:BB:GPS:SVID:NMESsage:SVConfig...........................................................................113 [:SOURce]:BB:GPS:SVID:NMESsage:TGD..................................................................................113 [:SOURce]:BB:GPS:SVID:NMESsage:TLS.....................
GPS and Assisted GPS Index Index Symbols (A-S) Flags and SV Config ............................................ 113 A A_0 .......................................................................... 51, 103 A_1 .......................................................................... 51, 103 a_f0 .......................................................................... 50, 102 a_f1 .......................................................................... 50, 101 a_f2 ....................................
GPS and Assisted GPS Get Next Handover Time ........................................ 62, 127 Global Trigger/Clock Settings .......................................... 71 GPS RF Default settings ............................................ 29, 81 Greenwich Mean Time .............................................. 38, 92 H Index Multipath signal generation .............................................. 14 Multiplier ........................................................................
GPS and Assisted GPS Signal Duration ................................................................ 66 Signal Duration - Trigger ................................................ 135 Signal Duration Unit ........................................................ 65 Signal Duration Unit - Trigger ........................................ 135 Signal generation without time limitation .......................... 13 Simulation Date ................................................................
