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R&S QAR Series User Manual

R&S QAR Series User Manual

Quality automotive radome tester
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R&S
QAR
Quality Automotive Radome Tester
User Manual
(;ÜÖ02)
1178720002

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Summary of Contents for R&S QAR Series

  • Page 1 ® R&S Quality Automotive Radome Tester User Manual (;ÜÖ02) 1178720002...
  • Page 2 ® This document describes the following R&S QAR models and options: ● ® R&S QAR QAR Panel for reflectivity measurements (1336.6008.02) ● ® R&S QAR-Z10 Transmitter Module (1336.5401.02) ● ® R&S QAR-Z20 Platform (1336.5418.02) ● ® R&S QAR-Z21 Platform for radar positioning measurements (1336.5524.02) ●...

  • Page 3: Table Of Contents

    ® Contents R&S Contents 1 Safety Instructions.................7 2 Documentation Overview..............9 3 R&S QAR Tour..................10 Main Power Supply..................... 11 Power Button.......................12 Transmitter Module Control..................13 Monitor Connectors....................14 LAN Interface.......................14 USB Ports........................15 4 Preparing for Use................. 16 Unpacking the R&S QAR....................16 Installing the R&S QAR....................
  • Page 4 ® Contents R&S Bumper Measurements....................44 5.2.1 Test Setup........................45 5.2.2 Graphical User Interface....................45 5.2.3 Measurements......................48 5.2.4 Configuration.........................49 5.2.5 Verification........................51 Radar Positioning Measurements................53 5.3.1 Test Setup........................53 5.3.2 Graphical User Interface....................55 5.3.3 Measurement........................ 57 5.3.4 Configuration.........................59 5.3.5 Verification........................63 6 Remote Control - SCPI.................66...
  • Page 5 ® Contents R&S Software Update......................92 Glossary....................93 Index......................95 User Manual 1178.7200.02 ─ 04...
  • Page 6 ® Contents R&S User Manual 1178.7200.02 ─ 04...

  • Page 7: Safety Instructions

    ® Safety Instructions R&S 1 Safety Instructions The R&S QAR Quality Automotive Radome Tester is manufactured according to the highest technical standards. To use the scanner safely, follow the instructions provided here and throughout the product documentation. Keep the documentation nearby and offer it to other users.
  • Page 8 ® Safety Instructions R&S Installing cables A R&S QAR installation consisting of the R&S QAR, monitor and transmitter module requires cable connections (power cables, LAN cables etc.). Make sure to secure all cables on the floor and cover them up. Loose cables are a tripping hazard.

  • Page 9: Documentation Overview

    ® Documentation Overview R&S 2 Documentation Overview This section provides an overview of the R&S QAR user documentation. User manual Contains a description of the R&S QAR system, including the features available in the R&S QAR software. The printed user manual is part of the delivery. Service manual Contains information about checking the rated specifications, module replacement and repair, software update and troubleshooting.

  • Page 10: S Qar Tour

    ® R&S QAR Tour R&S 3 R&S QAR Tour The R&S QAR is a millimeter wave imaging system operating in the frequency band of automotive radar sensors. With its support of spatially resolved reflection and transmis- sion loss measurements, the R&S QAR provides an intuitive and powerful way to eval- uate how radomes and bumpers influence the radar performance.

  • Page 11: Main Power Supply

    ® R&S QAR Tour R&S Main Power Supply ● USB Mouse Connectors The R&S QAR has several connectors on its back side. Figure 3-1: Connectors 1 = AC inlet and main power switch 2 = Ground terminal 3 = Transmitter module control 4 = Power supply for a monitor (including 2 fuses) 5 = LAN interface 6 = Display connector (DVI)

  • Page 12: Power Button

    ® R&S QAR Tour R&S Power Button For more information about supplying the panel with power, see Chapter 4.4, "Switch- ing the R&S QAR On and Off", on page 27. Circuit breaker The main power switch contains an RCD (residual-current device) that protects the internal power circuit of the R&S QAR.

  • Page 13: Transmitter Module Control

    ® R&S QAR Tour R&S Transmitter Module Control Figure 3-3: Power button For more information about switching the R&S QAR on and off, see Chapter 4.4, "Switching the R&S QAR On and Off", on page 27. 3.3 Transmitter Module Control The connectors for the optional transmitter module for transmission loss measure- ments are located on the back of the R&S QAR.

  • Page 14: Monitor Connectors

    ® R&S QAR Tour R&S LAN Interface 3.4 Monitor Connectors A DVI interface and power supply (AC outlet) for a monitor are located on the back side of the R&S QAR. Use them to connect an external monitor to operate the R&S QAR.

  • Page 15: Usb Ports

    ® R&S QAR Tour R&S USB Ports 3.6 USB Ports The R&S QAR provides 4 USB ports on the back side. The two top ports are USB 3.0 type A. The two bottom ports are USB 2.0 type A. They offer multiple uses: ●...

  • Page 16: Preparing For Use

    ® Preparing for Use R&S Installing the R&S QAR 4 Preparing for Use Before you can use the R&S QAR, install it and connect the devices as described in the next subchapters. ● Unpacking the R&S QAR..................16 ● Installing the R&S QAR...................16 ●...

  • Page 17: Installing The R&S Qar On The Floor

    ® Preparing for Use R&S Installing the R&S QAR ● Anchor bolts size 12 mm, for example a Fischer FAZ II 12 (for floor installation only) ● Installing the R&S QAR on the Floor...............17 ● Installing the R&S QAR on the Platform (R&S QAR-Z20)........
  • Page 18 ® Preparing for Use R&S Installing the R&S QAR A = Drill hole location for R&S QAR B = Drill hole location for DUT mounting table Whenever you lift, move or carry the R&S QAR, use the handles on its back side. 2.

  • Page 19: Installing The R&S Qar On The Platform (R&S Qar-Z20)

    ® Preparing for Use R&S Installing the R&S QAR Figure 4-3: Support installation (top view) 4. Lift the R&S QAR into a stable position and in a right angle to the floor. 5. Secure the R&S QAR by screwing the two supports to the floor. The drill holes in the floor define the position of the supports.
  • Page 20 ® Preparing for Use R&S Installing the R&S QAR ● A counterclockwise movement raises the corresponding platform area. 4. Tighten the feet with the check nuts using the open-end wrench. Figure 4-4: Platform alignment Mounting the R&S QAR When the platform is in place, you can mount the R&S QAR on the platform. Whenever you lift, move or carry the R&S QAR, use the handles on its back side.

  • Page 21: Installing The Radome Measurement Elements

    ® Preparing for Use R&S Installing the R&S QAR 2. Lift the R&S QAR onto the platform into a stable position and in a right angle to the floor. 3. Secure the R&S QAR by screwing the two supports to the platform. The mounting holes in the platform define the position of the supports.
  • Page 22 ® Preparing for Use R&S Installing the R&S QAR Note: Insert a washer between screw and mounting table as shown in Figure 4-7. Figure 4-7: DUT mounting table and transmitter module installation Installing the DUT mounting table on the floor Altenatively, you can install the DUT mounting table directly on the floor.

  • Page 23: Installing The Bumper Measurement Elements

    ® Preparing for Use R&S Installing the R&S QAR Figure 4-8: DUT mounting table from above For more information about cable connections, see Chapter 3.3, "Transmitter Mod- Control", on page 13. 4.2.4 Installing the Bumper Measurement Elements The basic setup for bumper measurements consists of the R&S QAR and a reference reflector.

  • Page 24: Installing The R&S Qar On The Platform (R&S Qar-Z21)

    ® Preparing for Use R&S Installing the R&S QAR Figure 4-9: Lateral view - height and frontal distance Figure 4-10: Top view - lateral distance Installing the reference reflector 1. Hold the reference reflector to the stand. Verify that the top of the reflector pins are parallel to the R&S QAR front by using, for example, a spirit level.
  • Page 25 ® Preparing for Use R&S Installing the R&S QAR Installing the platform 1. Place the platform on a stable and horizontal surface that can support the weight of the R&S QAR. 2. Check with a spirit level if the platform itself is level. 3.

  • Page 26: Connecting The R&S Qar

    ® Preparing for Use R&S Connecting the R&S QAR Figure 4-12: R&S QAR installation, including support mounting 3. Secure the R&S QAR by screwing the two supports to the platform. Two socket head screws with a size 10 secure each support. The mounting holes in the platform define the position of the supports.

  • Page 27: Switching The R&S Qar On And Off

    ® Preparing for Use R&S Switching the R&S QAR On and Off Monitor (DVI + power) Keyboard (USB) Mouse (USB) R&S QAR Transmitter module (Radome measurements) AC Power Figure 4-13: Connection overview in a system with optional transmitter module 1. Connect a monitor to the DVI port on the R&S QAR. As a power source, you can use a household AC outlet or the integrated power supply to supply the monitor with power (for monitors with a light-current extension cable).

  • Page 28: Operating System

    ® Preparing for Use R&S Operating System Refer to the datasheet for power rating and electrical safety compliance. 1. Make sure that the protective ground connection is established. For more information, see "Protective ground connection" on page 12. 2. Connect the power cable to the AC inlet. 3.

  • Page 29: Virus Protection

    ® Preparing for Use R&S Operating System Risk of altering the R&S QAR configuration The drivers and software installed are adapted for using the R&S QAR. Only install software updates released by Rohde & Schwarz. 4.5.1 Virus Protection Take appropriate steps to protect your instruments from infection. Use strong firewall settings and scan any removable storage device used with a Rohde &...

  • Page 30: Operating The R&S Qar

    ® Operating the R&S QAR R&S Radome Measurements 5 Operating the R&S QAR The application to operate the R&S QAR is installed on a PC that is integrated into the R&S QAR. It starts automatically when you turn on the R&S QAR. You can access the application by connecting a monitor, a keyboard and a mouse to the R&S QAR.

  • Page 31: Test Setup

    ® Operating the R&S QAR R&S Radome Measurements 5.1.1 Test Setup Basic test setup The basic test setup for radome measurements consists of the R&S QAR and a DUT that is placed at a certain distance from the R&S QAR. Figure 5-1: Basic test setup (distances in mm) Figure 5-1, the red box indicates the area in which the R&S QAR takes the image of...

  • Page 32: Graphical User Interface

    ® Operating the R&S QAR R&S Radome Measurements Figure 5-2: R&S QAR test setup with platform, mounting table and transmitter module Numbers without brackets = dimensions in mm Numbers in brackets = dimensions in inch 5.1.2 Graphical User Interface The graphical user interface (GUI) contains several elements. Figure 5-3: Software graphical user interface 1 = Menu bar 2 = Measurement description...
  • Page 33 ® Operating the R&S QAR R&S Radome Measurements 4 = Numeric results (reflection) 5 = Reflection mask editor 6 = Normalize reflection measurement 7 = Operating temperature 8 = System messages (incl. remaining warm-up time) 9 = Optional - Numeric results (transmission) 10 = Optional: Result display (transmission loss) 11 = Optional: Normalize transmission button 12 = Measure button...

  • Page 34: Measurements

    ® Operating the R&S QAR R&S Radome Measurements Menu bar The menu bar contains various settings. ● "File" Contains functionality to import and export measurement results, and functionality to close the software. ● "Options" Contains functionality to configure the measurement and result displays. ●...
  • Page 35 ® Operating the R&S QAR R&S Radome Measurements The measurement itself lasts less than a second. The results are displayed after a few seconds. For details on how to run the measurement, see Chapter 5.1.3.2, "Reflection Mea- surement", on page 36 and Chapter 5.1.3.3, "Transmission Measurement", on page 37.
  • Page 36 ® Operating the R&S QAR R&S Radome Measurements Normalizing the transmission measurement Normalizing the transmission measurement is done by a free-space measurement and requires no additional devices. However, make sure that the line of sight between R&S QAR and transmitter module is free of obstacles. 1.

  • Page 37: Configuration

    ® Operating the R&S QAR R&S Radome Measurements areas in more detail. For more information about working with the mask, see "Working with evaluation masks" on page 38. The mean reflection indicates the radar transparency of the DUT. The lower the mean reflection, the better the radar transparency of the DUT.
  • Page 38 ® Operating the R&S QAR R&S Radome Measurements Working with evaluation masks The evaluation mask available for the reflection measurement defines the area that is evaluated for the mean reflection and the standard deviation of the reflection measure- ment. 1. Select "Edit Mask". In editing mode, you can change the shape and location of the evaluation mask.
  • Page 39 ® Operating the R&S QAR R&S Radome Measurements 3. Select "Import Coordinates" to import the shape and location of the mask from coordinates in a .json file. Selecting the image color scheme The R&S QAR provides several color schemes for the image of the reflection measure- ment.

  • Page 40: Verification

    ® Operating the R&S QAR R&S Radome Measurements Contains the raw 3D imaging data. Only if you have selected the data package "Statistics + Pictures + Data + Vol- ume". This data package requires approx. 500 MB of disk space for each image. It also takes a long time to save this data package, approx.
  • Page 41 ® Operating the R&S QAR R&S Radome Measurements Warm-up time Let the R&S QAR warm up for at least 90 minutes before using it. Figure 5-4: Test setup for verification with objects Required equipment All required equipment is included in the delivery of the R&S QAR-Z40. ●...
  • Page 42 ® Operating the R&S QAR R&S Radome Measurements Mounting the frame for the verification objects The verification objects come with a frame that holds the objects. Screw the frame to the DUT mounting table. Figure 5-5: Installation of the verification object frame 1.
  • Page 43 ® Operating the R&S QAR R&S Radome Measurements The limits for the normalization of the reflection measurement are universal, not device-specific. 3. Verify the reflection measurement. a) Put the metal plate with cut-outs labeled D into the frame. b) Initiate a measurement. c) Remove the metal plate from the frame.

  • Page 44: Bumper Measurements

    ® Operating the R&S QAR R&S Bumper Measurements The first value "a " is the one-way mean attenuation in the frequency range from 76 GHz to 77 GHz. The second value "a " is the one-way mean attenuation in the frequency range from 76 GHz to 81 GHz.

  • Page 45: Test Setup

    ® Operating the R&S QAR R&S Bumper Measurements The typical procedure when measuring the transmission loss (attenuation) caused by a bumper is as follows: 1. Start the R&S QAR. The software starts automatically. For more information, see Chapter 5.2.2, "Graphical User Interface", on page 45.
  • Page 46 ® Operating the R&S QAR R&S Bumper Measurements Figure 5-7: Software user interface 1 = Menu bar 2 = Bumper type drop-down list and scanned barcode 3 = System messages 4 = Normalize button 5 = Numeric results (mean attenuation) 6 = Results indicator 7 = Measure button 8 = Operating temperature...
  • Page 47 ® Operating the R&S QAR R&S Bumper Measurements Bumper type selection Selects the configuration for the measurement (type of bumper you are measuring). The configuration determines which pins of the reference reflector to use for the mea- surement. The "default" configuration uses all pins. Settings and control buttons Several settings and buttons allow you to control the measurement.

  • Page 48: Measurements

    ® Operating the R&S QAR R&S Bumper Measurements Ctrl-Q Closes the software. Initiates a measurement. 5.2.3 Measurements For bumper measurements, the R&S QAR provides a reflection measurement. Bumper measurements require the optional reference reflector. The measurement usually con- sist of two steps, normalization and the actual measurement. Measuring a DUT 1.

  • Page 49: Configuration

    ® Operating the R&S QAR R&S Bumper Measurements The expected result is an attenuation around 0 dB. For a range of acceptable results, see the datasheet. If the results do not meet the expectations, repeat the normalization. If the second normalization still yields unexpected results, perform the verification, as described in Chapter 5.2.5, "Verification",...
  • Page 50 ® Operating the R&S QAR R&S Bumper Measurements Contains information about the configuration of the R&S QAR during the mea- surement. ● <yyyymmdd-hhmmss>_check_results.json Contains information about options. ● <yyyymmdd-hhmmss>_image.png Image of the measurement. ● <yyyymmdd-hhmmss>_result_QARQT.mat Contains the raw 2D imaging data. Only if you have selected the data package "Statistics + Pictures + Data".

  • Page 51: Verification

    ® Operating the R&S QAR R&S Bumper Measurements 3. Select the (serial) port the barcode scanner is connected to from the dropdown menu. 5.2.5 Verification The R&S QAR provides a verification procedure to validate the quality of the measure- ments. The verification consists of a series of measurements with standardized plates placed at a fix distance from the R&S QAR.
  • Page 52 ® Operating the R&S QAR R&S Bumper Measurements Figure 5-8: Placing the frame 2. Attach the verification plate to the frame. An arrow on the sticker indicates the cor- rect orientation. Figure 5-9: Placing the verification plate Performing verification The verification process consists of three consecutive measurements using the verifi- cation plates.

  • Page 53: Radar Positioning Measurements

    ® Operating the R&S QAR R&S Radar Positioning Measurements 7. Repeat the steps for the plates labeled "B" and "C". If the verification fails, calibrate the R&S QAR, as described in the service manual, or call your local R&S representative. If after calibration the verification fails again, check the hardware for defects.
  • Page 54 ® Operating the R&S QAR R&S Radar Positioning Measurements Figure 5-10: Test setup for radar positioning measurements (side view) The optimal distance to the front of the car depends on the location of the radar mod- ule relative to the radome's location on the car. ●...

  • Page 55: Graphical User Interface

    ® Operating the R&S QAR R&S Radar Positioning Measurements Figure 5-11: Test setup for radar positioning measurements (view from above) 5.3.2 Graphical User Interface The graphical user interface (GUI) contains several elements. User Manual 1178.7200.02 ─ 04...
  • Page 56 ® Operating the R&S QAR R&S Radar Positioning Measurements Figure 5-12: Software graphical user interface 1 = Menu bar 2 = Car type 3 = Description 4 = Numeric positioning results 5 = Numeric detection results 6 = Overall result 7 = Status bar 8 = Operational mode 9 = Result display...

  • Page 57: Measurement

    ® Operating the R&S QAR R&S Radar Positioning Measurements Initiates a measurement. For more information, see Chapter 5.1.3.2, "Reflection Measurement", on page 36 Chapter 5.1.3.3, "Transmission Measurement", on page 37. ● System messages Shows various status messages of the system like a missing normalization or the remaining warm-up time.
  • Page 58 ® Operating the R&S QAR R&S Radar Positioning Measurements After the position and orientations of both radar and sensor and have been found in the image, the R&S QAR uses the CAD model of the radar sensors emission cone to cal- culate the intersection area of the emission cone and the radome.

  • Page 59: Configuration

    ® Operating the R&S QAR R&S Radar Positioning Measurements The upper part of the table of the numeric result summary shows the deviation between specified distances and measured distances for all eight measurement points. By default, the results are shown in ascending order, from smallest to largest distance. You can also define a different order based on the index number of the measurement point.
  • Page 60 ® Operating the R&S QAR R&S Radar Positioning Measurements Selecting the working mode The system mode selects the radar positioning measurement test setup you are using. You can either integrate the R&S QAR in a custom automated system ("Inline" mode) or use it in a stand-alone setup.
  • Page 61 ® Operating the R&S QAR R&S Radar Positioning Measurements Figure 5-13: Set alarm limits dialog box 2. Define the limits as necessary. ● Angle limits Maximal difference between theoretical and measured rotation angles. If the measured difference is higher than the maximum limit, it means that the radar is too turned around an axis and you get a "Not OK"...
  • Page 62 ® Operating the R&S QAR R&S Radar Positioning Measurements Managing measurement results You can export the measurement data, for example to store it on an external memory device or copy it to a different computer for further analysis with different software. You can also restore data that you have taken at some point and review it in the applica- tion.

  • Page 63: Verification

    ® Operating the R&S QAR R&S Radar Positioning Measurements 3. Select "Connect" to connect with the remote computer. Using a barcode scanner You can connect a barcode scanner to the R&S QAR to scan the barcode of a DUT and use this as a reference that the DUT with a certain barcode has passed or failed the test.
  • Page 64 ® Operating the R&S QAR R&S Radar Positioning Measurements Installing the mounting frame for the verification objects The verification set includes a mounting frame that holds the verifications objects. For verification, you have to place the mounting frame in front of the R&S QAR at a defined location.
  • Page 65 ® Operating the R&S QAR R&S Radar Positioning Measurements 3. Start a measurement ("Measure"). 4. Repeat the procedure for all three verification objects. Verification passes if the measurement results for all three objects are within the limits (measurement result is "OK"). 5.

  • Page 66: Remote Control - Scpi

    ® Remote Control - SCPI R&S Remote Control Interface and Protocol 6 Remote Control - SCPI ● Remote Control Interface and Protocol..............66 ● Remote Commands....................67 6.1 Remote Control Interface and Protocol For the R&S QAR, the remote control interface is the LAN interface. The LAN interface consists of a connector, a network interface card and protocols.

  • Page 67: Remote Commands

    ® Remote Control - SCPI R&S Remote Commands VISA library A VISA installation is a prerequisite for remote control using the LAN interface. VISA is a standardized software interface library providing input and output functions to communicate with instruments. High level programming platforms use VISA as an intermediate abstraction layer.
  • Page 68 ® Remote Control - SCPI R&S Remote Commands Setting parameters: <Directory> String that contains the location of the results. The location is always a complete directory, because measure- ment results are made up out of several files. Example: //Restore measurement results MEAS:LOAD 'c:\qar\results\measurement' Usage: Setting only...
  • Page 69 ® Remote Control - SCPI R&S Remote Commands Prerequisites for this command ● Turn on barcode scanner (MEASurement:RESult:BCS:USE). Parameters: <Port> String that contains the (serial) port the barcode scanner uses. Example: //Select barcode scanner port MEAS:RES:BCS:USE ON MEAS:RES:BCS:PORT 'COM1' MEASurement:RESult:BCS:USE <State> This command turns the usage of a barcode scanner on and off.
  • Page 70 ® Remote Control - SCPI R&S Remote Commands MEASurement:RESult:SAVE:WBC <State> This command turns the webcam on and off. Parameters: <State> ON | 1 Webcam takes a picture of the DUT during the measurement. OFF | 0 Turns off the webcam. *RST: Example: //Turn off webcam...
  • Page 71 ® Remote Control - SCPI R&S Remote Commands Code Message Description No configuration found for operation Reinstall software mode '<opmode>' Error occurred during initialization Contact service QAR hardware not initialized Contact service Invalid measurement type '<type>' Correct measurement type Invalid configuration '<config>' Correct measurement configuration Results are invalid Dismiss measurement results and repeat the...

  • Page 72: Radome Measurements

    ® Remote Control - SCPI R&S Remote Commands Usage: Event SYSTem:STATus:CODE? This command queries the system status. Return values: <StatusCode> Example: //Query system status SYST:STAT:CODE? Usage: Query only Code Message Description Ready for measurement Device initializing Wait until hardware initialization is done.
  • Page 73 ® Remote Control - SCPI R&S Remote Commands Measurement is normalized. Measurement is not normalized. In that case, you should nor- malize the measurement before starting it. Example: //Query normalization state MEAS:REFL:NORM:REQ? Usage: Query only MEASurement:REFLection:NORMalization:STARt This command initiates the normalization of a reflection measurement. We recommend to define a timeout of at least 10 seconds to allow for the measure- ment to finish.
  • Page 74 ® Remote Control - SCPI R&S Remote Commands Suffix: <n> 1: Result in dB 2: Result in % 3: Linear result You can query the unit of a result with MEASurement: REFLection:STATistics<n>:UNIT?. Return values: <Deviation> The unit is either dB or PCT. Example: //Query standard deviation of the reflection measurement MEAS:STAR...
  • Page 75 ® Remote Control - SCPI R&S Remote Commands MEASurement:TRANsmission:BAND<n>:STATistics<m>:MEAN? This command queries the one-way mean attenuation of the transmission measure- ment. Suffix: <n> 1: First evaluated frequency band. 2: Second evaluated frequency band. <m> 1: Logarithmic result. 2: Linear result. You can query the unit of a result with MEASurement: TRANsmission:BAND<n>:STATistics<m>:UNIT?.
  • Page 76 ® Remote Control - SCPI R&S Remote Commands MEASurement:TRANsmission:NORMalization:REQuired? This command queries the normalization state of the transmission measurement. Return values: <State> Measurement is normalized. Measurement is not normalized. In that case, you should nor- malize the measurement before starting it. Example: //Query normalization state MEAS:TRAN:NORM:REQ?
  • Page 77 ® Remote Control - SCPI R&S Remote Commands MEASurement:REFLection:MASK:EXPort <FileName> This command exports the coordinates of an evaluation mask and stores them in the .json file format. Setting parameters: <FileName> String that contains the file name and its location. Note that the file name must have the .json file extension.

  • Page 78: Bumper Measurements

    ® Remote Control - SCPI R&S Remote Commands 6.2.3 Bumper Measurements 6.2.3.1 Measurements Remote commands described elsewhere: ● on page 67 MEASurement:LOAD ● on page 68 MEASurement:SAVE ● on page 68 MEASurement:STARt MEASurement:ATTenuation:MEAN? This command queries the mean attenuation. Prerequisites for this command: ●...
  • Page 79 ® Remote Control - SCPI R&S Remote Commands Example: //Query unit of the attenuation measurement MEAS:STAR MEAS:ATT:UNIT? Usage: Query only MEASurement:BTYPe <BumperType> This command sets the bumper type. Parameters: <BumperType> String containing the bumper type name Example: //Set the bumper type. MEAS:BTYP 'RR_L' MEASurement:NORMalize:REQuired? This command queries the normalization state of the attenuation measurement.
  • Page 80 ® Remote Control - SCPI R&S Remote Commands Prerequisites for this command: ● Attenuation measurement results must be available. Return values: <State> Measured attenuation is below threshold. Measured attenuation is above threshold. Example: //Query if attenuation is below threshold MEAS:STAR MEAS:OK? Usage: Query only...

  • Page 81: Remote Control - Opc

    ® Remote Control - OPC R&S OPC Variables 7 Remote Control - OPC OLE for process control (OPC) is an interface that enables you to communicate with the R&S QAR through a Programmable logic controller (PLC). Rohde & Schwarz provides a client application, R&S QAROPCClient, that connects to an OPC server that hosts the variables used for communication with the PLC.

  • Page 82: From Plc Communication

    ® Remote Control - OPC R&S OPC Variables Figure 7-3: Radome measurements variables Figure 7-4: Bumper measurements variables 7.1.1 From PLC Communication The following table displays all variables written by the PLC and read by the R&S QAR. All variable names have the prefix: CompactLogix.Compact Logix_PLC.Global.QAR.FromPLC User Manual 1178.7200.02 ─...

  • Page 83: To Plc Communication

    ® Remote Control - OPC R&S OPC Variables Table 7-1: OPC variables read by R&S QAR Variable name Type Description Configuration String Measurement configuration (i.e. "G05-Base") Type_Measurement String Measurement type. Can be “standard” or “reflec- tion_normalization” or, for radome measurements, “transmission_normalization”.
  • Page 84 ® Remote Control - OPC R&S OPC Variables Variable name Type Description RadomeMeasurement.Reflec- Bool True if reflection normalization is required. tion.Normalize_Required RadomeMeasurement.Transmis- Bool True if transmission normalization is required. sion.Normalize_Required Process_Time_Sec Float Elapsed time in seconds for analyzing the current mea- surement.

  • Page 85: Variables Data Types

    ® Remote Control - OPC R&S OPC Variables Table 7-4: To PLC - Bumper measurements variables Variable name Type Description Error_Code Integer Error code. Normalize_Required Bool True if normalization is required. Process_Time_Sec Float Elapsed time in seconds for analyzing the current mea- surement.

  • Page 86: Device States

    ® Remote Control - OPC R&S Device States Table 7-6: String variables length Variable name Maximum string length Configuration_x.Configuration_<dd> Error_Msg Path_Results Path_Diagnostics Timestamp *.Unit 7.2 Device States While operating, the R&S QAR gets different states as shown in Figure 7-5. 1.

  • Page 87: Timing Diagram

    ® Remote Control - OPC R&S Timing Diagram Initializing Ready_ToMeasure If initialization fails Malfunction Processing If diagnostic fails Results_Ready Results_Received=true Figure 7-5: R&S QAR states 7.3 Timing Diagram The timing of communication for measurements and diagnostics between the PLC and the R&S QAR is identical.

  • Page 88: Error Handling

    ® Remote Control - OPC R&S Error Handling Type_Measurement Configuration Trigger.MeasureRadome Trigger.Diagnostics Results_Received R&S QAR State.Initializing State.Ready_ToMeasure State.Processing State.Results_Ready Figure 7-6: Timing diagram for measurements and diagnostics 7.4 Error Handling Errors can occur during R&S QAR initialization or while performing measurements. They are listed in the next subchapters.

  • Page 89: Measurement Errors

    ® Remote Control - OPC R&S Error Handling Table 7-7: Initialization errors Error code Error message Description Solution Could not load Application cannot Restore directory config in R&S QAR configu- load the configu- C:\Program Files (x86)\ ration. ration Rohde-Schwarz\QAROPCClientRadome C:\Program Files (x86)\ Rohde-Schwarz\QAROPCClientBumper Invalid operation Application config-...
  • Page 90 ® Remote Control - OPC R&S Error Handling Table 7-8: Measurement Errors Error code Error message Description Solution Invalid measure- Invalid type of Set correct measurement type. ment type ‘<meas- measurement Type>’ given. Invalid configuration Invalid measure- Set correct measurement configuration. ‘<config>’...

  • Page 91: Maintenance

    ® Maintenance R&S Cleaning Information 8 Maintenance Daily maintenance or inspection is not required for the R&S QAR. We recommend to do a verification at least every six months. ● Cleaning Information....................91 ● Software Update..................... 92 8.1 Cleaning Information The R&S QAR and its accessories are sensitive devices.
  • Page 92 ® Maintenance R&S Software Update Cleaning the transmitter module (R&S QAR-Z10) 1. Clean the horn antenna, cables and cable connectors carefully with a dry and soft, lint-free dust cloth. Other cleaning materials can leave residue on the rubber coat- ing of the absorber. If there are bigger dirt particles in the inside of the horn antenna, pick them out carefully with tweezers.
  • Page 93 ® Glossary R&S Glossary Calibration: Determines reproducible system characteristics and reduces the corre- sponding measurement deviations, thus increasing measurement accuracy signifi- cantly. The calibration set is available as accessory (R&S QAR-Z30). DUT: Device under test. For the R&S QAR, the DUT is usually a radome or a bumper. Mean reflection: Mean value of the reflection measured in the analyzed area of the DUT.
  • Page 94 ® Glossary R&S Reflection: The part of the signal that is reflected by the DUT. Result display: Diagram that shows the measurement results. Standard deviation: Result that indicates the dispersion of the measured reflection values. The standard deviation indicates the homogeneity of the DUT. Transmission loss: Measure of attenuation of the DUT over a certain frequency range.
  • Page 95 ® Index R&S Index Operating system .............. 28 service packs .............. 29 Barcode scanner ........... 40, 50, 63 Operation ................30 Bumper measurements ............. 44 Bumper measurements ..........44 Attenuation measurement ........... 49 Radar positioning measurement ......... 53 Normalization .............. 48 Radome measurements ........
  • Page 96 ® Index R&S User interface language ............ 61 User interface mode ............59 Verification .................63 Bumper measurements ..........51 Radome measurements ..........40 Verification results ............. 64 Virus protection ..............29 Webcam ..............40, 50 Windows 7 Embedded ............28 Working mode ..............

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