R&S DST200 User Manual
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R&S DST200 User Manual

R&S DST200 User Manual

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R&S
DST200
RF Diagnostic Chamber
User Manual
(??>E2)
1515.1421.02 ─ 05

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  • Page 1 ® R&S DST200 RF Diagnostic Chamber User Manual (??>E2) 1515.1421.02 ─ 05...
  • Page 2 Bluetooth SIG, Inc. and any use of such marks by Rohde & Schwarz is under license. Trade names are trademarks of the owners. The following abbreviations are used throughout this manual: R&S ® DST200 is abbreviated as R&S DST200, options R&S ® DST-Bxxx as R&S DST-Bxxx and options R&S ®...

  • Page 3: Table Of Contents

    Accessing the Upper Compartment................11 3.1.5 Accessing the Lower Compartment................12 3.1.6 Installing the EUT and Connecting the Test Equipment..........14 Interfaces and Filter Panels for the R&S DST200............ 15 3.2.1 LP&FO Filter Panel (R&S DST-B101)................16 3.2.2 RF Interface Panel (R&S DST-B102)................16 3.2.3...
  • Page 4 ® Contents R&S DST200 Desense and Self-Interference Tests................ 47 Path Loss Measurement.....................48 5.2.1 Input Path Loss......................50 5.2.2 Output Path Loss......................50 5.2.3 Determining Path Loss Values: R&S CMW..............51 5.2.4 Determining Path Loss Values: R&S CMU200............. 56 6 Maintenance..................61 Spare Parts........................

  • Page 5: Documentation Overview

    The User Manual contains a comprehensive description of the functionality of the RF Diagnostic Chamber and all its hardware options. It is delivered as a printed document with the R&S DST200 and also available on the internet as a pdf document. For the latest version of the User Manual, visit the product homepage.

  • Page 6: Safety Instructions

    R&S DST200 2 Safety Instructions This R&S DST200 RF Diagnostic Chamber has been designed and tested in accord- ance with the EC Certificate of Conformity and has left the manufacturer’s plant in a condition fully complying with safety standards. General safety instructions To maintain this condition and to ensure safe operation, you must observe all instruc- tions and warnings given in this manual.

  • Page 7: Rf Diagnostic Chamber Features

    R&S CMW family or a Universal Radio Communication Tester R&S CMU200. You can equip the R&S DST200 with one or more antennas of various types. The antennas are available as hardware options.

  • Page 8: Rf Diagnostic Chamber

    ® RF Diagnostic Chamber Features R&S DST200 RF Diagnostic Chamber The present manual describes the positioning and use of the chamber, the installation of hardware options, and the functional check. The technical specifications of the RF Diagnostic Chamber are listed in the data sheet PD 5214.3600.22.

  • Page 9: Positioning The Rf Diagnostic Chamber

    Diagnostic Chamber using the four handles on both side walls. If you wish to remove the balancing weight for easier transport, open the two screws on either side and remove it from the slot. Never use the locking handle to carry the R&S DST200 RF Diagnostic Chamber. User Manual 1515.1421.02 ─ 05...

  • Page 10: Opening And Closing The Front Door

    RF Diagnostic Chamber Protecting R&S DST200 during transportation For best protection against damage of R&S DST200 during transportation a shipping container (accessory R&S DST-Z5, stock number 1518.9530.02) can be ordered from Rohde & Schwarz. The multiple-use container provides a solid shell to encapsulate the whole R&S DST200.

  • Page 11: Replacing The Shielding Gaskets

    ® RF Diagnostic Chamber Features R&S DST200 RF Diagnostic Chamber 3.1.3 Replacing the Shielding Gaskets The EMI/EMC shielding gaskets in the U-shaped joint around the front side of the chamber and the contact strips of the connector units and antenna are expendable parts which must be replaced if they are visibly corroded or damaged.

  • Page 12: Accessing The Lower Compartment

    It also has a grip hole in the front for easy removal. Figure 3-3: Floor panel of the R&S DST200 1 = Floor panel 2 = Grip hole...
  • Page 13 ® RF Diagnostic Chamber Features R&S DST200 RF Diagnostic Chamber 6 = Screw to fixate the centerpiece 7 = Holes for mounting the positioning equipment 8 = Screw to fixate floor panel Basically, it is sufficient to remove the centerpiece of the floor panel to access the lower compartment.

  • Page 14: Installing The Eut And Connecting The Test Equipment

    In this case the test antenna is located in the reactive near-field region of the EUT enabling RF detection of its EMI sources. For examples of the electric field strength radiated by the test antenna within the chamber refer to the R&S DST200 product brochure, no. PD 5214.3600.12.

  • Page 15: Interfaces And Filter Panels For The R&S Dst200

    Its distance from the test antenna is approximately 50 mm. Radiated connection to the test equipment The outer antenna connectors on the right wall of the R&S DST200 RF Diagnostic Chamber can be connected to the RF connectors of the test equipment (e.g. R&S CMW500, RF1 COM connector).

  • Page 16: Lp&Fo Filter Panel (R&S Dst-B101)

    ● Chapter 3.2.4, "Power Interface Panel (R&S DST-B104)", on page 18 ● R&S DST200-Z18: The "RF Cable 18 GHz, 1.5 m" is an RF cable with a high shielding effectiveness. For more information see "RF connection" on page 15. 3.2.1 LP&FO Filter Panel (R&S DST-B101) The LP &...

  • Page 17: Usb Filter Panel (R&S Dst-B103)

    RF Diagnostic Chamber Features R&S DST200 Interfaces and Filter Panels for the R&S DST200 Together with antenna connectors, the RF interface panel allows you to supply the EUT with up to four independent RF signals. An additional RF feed through is also suited for connecting a reference antenna.

  • Page 18: Power Interface Panel (R&S Dst-B104)

    USB cable that is equip- ped with EMI ferrite attenuators. 3.2.4 Power Interface Panel (R&S DST-B104) The Power interface panel supplies the R&S DST200 with filtered AC power. Make sure not to violate the current limitations. For more information refer to the data sheet.

  • Page 19: Positioners For The R&S Dst200

    12. 3.3 3D Positioners for the R&S DST200 The 3D Positioners for the R&S DST200 holds the EUT at a specific angular orienta- tion. Measurements at well-defined orientations are often required in the product design process. CTIA - The Wireless Association specifies appropriate spherical coor- dinates for the EUT orientation;...

  • Page 20: Manual 3D Positioner (R&S Dst-B150)

    The 3D positioners are designed to position the EUT below the test antennas installed at the top of the R&S DST200 RF diagnostic chamber. The EUT itself is held by a rub- ber band to the EUT holder that is delivered with the 3D positioners.

  • Page 21: Automated 3D Positioners (R&S Dst-B160 / -B165)

    3D Positioners for the R&S DST200 ● the face of the EUT points to the rear side of the R&S DST200 RF Diagnostic Chamber in case of the manual 3D positioner in 'Y' orientation In case of the manual 3D positioner the elevation rotator can be placed either in 'X' or 'Y' orientation.
  • Page 22 ● the EUT is in a vertical position ● the face of the EUT points to the front side of the R&S DST200 RF Diagnostic Chamber in case of the automated 3D positioner Risk of damaging the automated 3D positioner Do not turn the elevation and azimuth rotators of the automated 3D positioner man- ually.
  • Page 23 ® RF Diagnostic Chamber Features R&S DST200 3D Positioners for the R&S DST200 Table 3-2: EUT holder on an automated 3D positioner Automated 3D positioner with EUT at the home Mounting of EUT holder on automated 3D posi- position (theta = phi = 0) tioner Note that the pictures show the R&S DST-B165 as an example.
  • Page 24 The cover is compatible to the other positioning devices. Thus, if you remove the automated 3D positioner from the motor unit, you can use it for the other devices as well. For instructions on how to install the centerpiece of the R&S DST200 floor panel Chapter 3.1.5, "Accessing the Lower Compartment", on page 12.
  • Page 25 R&S DST200. Figure 3-8: D-Sub port on the back of the motor unit For more information on how access the lower compartment of the R&S DST200 Chapter 3.1.5, "Accessing the Lower Compartment",...

  • Page 26: Antennas For The R&S Dst200

    3.4 Antennas for the R&S DST200 3.4.1 Test Antennas You can equip the R&S DST200 with various test antennas that are available as hard- ware options. ● Cross-polarized test antenna (R&S DST-B215) ●...
  • Page 27 Pol. LR The antenna connectors for both polarizations are available at the interface panel mounted at the right side of the R&S DST200 RF Diagnostic Chamber. The N female connectors are labeled "Pol. FB" and "Pol. LR". Antenna polarization in the R&S AMS32 software "Hardware Configuration"...
  • Page 28 R&S DST200. 3. Screw the antenna to the ceiling of the chamber. Note that you have to open the upper compartment of the R&S DST200 to be able to screw the antenna on from outside the chamber.

  • Page 29: Communication Antennas

    5. Screw the interface panel to the right wall of the chamber. 6. Connect the antenna output to the RF output of the R&S DST200 with one (circu- lar-polarized) or two (cross-polarized) semi-rigid cables. Circular-polarized antennas have one output.
  • Page 30 Antenna to provide additional radiation directions for MIMO measurements. Very low thickness of the antenna allows easy installation at the edge of the cubical test space inside the R&S DST200. A traveling wave structure of the antenna provides ultra wideband frequency operation.

  • Page 31: Functional Check

    The technical data of the RF Diagnostic Chamber and the antennas are listed in the R&S DST200 data sheet, see PD 5214.3600.22. To check compliance with the rated VSWR specifications of the antenna, you can use one of the following measurement devices: ●...

  • Page 32: Configuring A Test Pc

    11. 3.5 Configuring a Test PC You can control the automated 3D positioner available for the R&S DST200 RF Diag- nostic Chamber (R&S DST-B16x) with an external control computer that is equipped with the R&S AMS32 or R&S EMC32 system software. Both system software should be in version 9.00 or higher.
  • Page 33 In the "Properties" tab, select "Standard Turntable" as the device type. Set the "Tolerance" to 1 and "Acceleration" to 4. d) In the "Device List", register a second "DST200 Positioner" device from the device class "TurnTables" and rename it to "DST200 Elevation Positioner".
  • Page 34 In the "General" tab, set the "State" for both positioners to "Physical". h) Finally registration and configuration of both positioners is completed. Figure 3-13: Registered drivers for R&S DST200 elevation and azimuth positioners in R&S AMS32 3. Configure OTA options a) Open the "OTA Options"...
  • Page 35 EUT holder. To perform auto calibration: 1. Open the "Device List" in the "Extras" menu. 2. Open the dialog box to define the characteristics for the "DST200 Elevation Posi- tioner" device by double-clicking on it. 3. In the "Homing" tab, press the "Auto Calibration" button to determine correction factors automatically.
  • Page 36 In the "Test" tab, set appropriate values for the "New Position" for both rotators to achieve azimuth = elevation = 0° on the angle lables. b) In the "Homing" tab of the "DST200 Elevation Positioner" device, enter the off- set values you have found in the "Offset Elevation" and "Offset Azimuth" fields.

  • Page 37: Reference Path Loss Measurement

    ® Reference Path Loss Measurement R&S DST200 Background 4 Reference Path Loss Measurement Over-the-air (OTA) measurements attempt to determine the performance of radio transmitters and receivers in a test environment which closely simulates the conditions in which the devices will be used. OTA tests for mobile phones have been promoted ®...

  • Page 38: Measurement

    In addition, do not move the antenna to another position after you have calibrated the test setup or else calibration becomes invalid. 4.2 Measurement The principle of the following measurement procedure is valid for all R&S DST200 antennas when a calibration plane is selected at the appropriate antenna connector. For more information see Chapter 3.4, "Antennas for the R&S...
  • Page 39 ® Reference Path Loss Measurement R&S DST200 Measurement 2. Measure the connected RF Diagnostic Chamber in transmission. Cable calibration The suggested test setup uses port 1 of the VNA as a source port, port 2 as a receive port. Calibration is performed with all cables connected to both analyzer ports. For best accuracy, use high-quality RF cables and perform a full two-port calibration.

  • Page 40: R&S Dst-B120 Positioner For Calibration Antennas

    The R&S DST-B120 positioner (order number 1516.8659.02) can be used to support height and orientation adjustment during path loss calibration of the R&S DST200. The calibration antenna that is used for this procedure is positioned in the chamber as the reference antenna (which replaces the EUT).

  • Page 41: Installation Procedure

    Reference Path Loss Measurement R&S DST200 R&S DST-B120 Positioner for Calibration Antennas Note that a VNA is required for the path loss calibration of the R&S DST200 with the R&S DST-B120. Figure 4-4: R&S DST-B120 positioner kit for calibration antennas Left...
  • Page 42 Right = Once the adapters stick out through the absorber panel, remove adapter A 13. Put the front absorber panel back to its place inside the R&S DST200 chamber. Note: This completes the mechanical preparation in the lower part of the chamber.
  • Page 43 2. This cable must be long enough to reach the N connectors "Pol. FB" and "Pol. LR" for test antenna feed at the top of the R&S DST200. Do not connect this cable to any of those test antenna feed connectors.
  • Page 44 23. Connect the RF cable that comes out of adapter B (with or without SMA-N adapter) to the selected reference antenna. 24. Inside the R&S DST200, mount the reference antenna at a height that is equivalent with the center of the selected positioner. Depending on the selected reference...

  • Page 45: Generic Rf Parameters: R&S Dst-B220

    Generic RF Parameters: R&S DST-B220 4.4 Generic RF Parameters: R&S DST-B220 You can download a set of measured antenna factors (AF), reference path loss values (PL) and transducer factors (TRD) from the R&S DST200 homepage (http:// www.rohde-schwarz.com/product/DST200.html). The measured values are valid for any linear-polarized electrical field in the horizontal plane (E = 0) incident on the test antenna (AF, PL) or the EUT (TRD, PL).
  • Page 46 A comprehensive set of RF parameters is available for download from the product homepage (http://www.rohde-schwarz.com/product/DST200.html) of the R&S DST200. These values are generic values collected in a specific R&S DST200 sample measure- ment. To obtain the values specific for your RF Diagnostic Chamber, use a calibrated reference antenna and perform the reference path loss measurement as described in Chapter 4.2,...

  • Page 47: Test Scenarios

    ® Test Scenarios R&S DST200 Desense and Self-Interference Tests 5 Test Scenarios 5.1 Desense and Self-Interference Tests The basic test setup for receiver and transmitter tests in an interference-free and reflection-free environment is shown below. The equipment under test (typically, a mobile station, but also any other device with a radio interface) is placed on the EUT table inside the RF Diagnostic Chamber.

  • Page 48: Path Loss Measurement

    ® Test Scenarios R&S DST200 Path Loss Measurement Figure 5-2: GSM desense test Coexistence tests The following figure shows a test setup for a Bluetooth® / GSM coexistence test with the RF Diagnostic Chamber and two radio communication testers. The R&S CBT Blue- ®...
  • Page 49 EUT, in ᅟ= <Generator level of tester>/dBm – <Received signal level at the EUT>/dBm Each R&S DST200 antenna model (R&S DST-B215, R&S DST-B220, R&S DST-B231 and R&S DST-B270) provides different path loss. If you use a cross-polarized antenna (R&S DST-B215), you should measure the path loss for each electric field polarization separately.

  • Page 50: Input Path Loss

    Path Loss Measurement Path loss, R&S DST200 antenna model and EUT type The path loss values depend on the R&S DST200 antenna model (R&S DST-B215, R&S DST-B220, R&S DST-B231 and R&S DST-B270) and the EUT type. If a cross- polarized antenna (R&S DST-B215) is used, the path loss for each field polarization should be measured separately.

  • Page 51: Determining Path Loss Values: R&S Cmw

    The procedure for other bandwidths is similar, however, some more R&S CMW set- tings may have to be adjusted. 1. Connect the N connector of your RF Diagnostic Chamber R&S DST200 to the bidirectional RF connector RF 1 COM of the R&S CMW, preferably using the high- quality RF cable supplied with the RF Diagnostic Chamber.
  • Page 52 ® Test Scenarios R&S DST200 Path Loss Measurement When the R&S CMW shows the connection status "Network Entry Completed", press the "MS Channel Report" softkey. 2. Open the "Results > MS Channel Report" section in the measurement dialog and read the "UL TX Power (Data Carrier Power)" result.
  • Page 53 ® Test Scenarios R&S DST200 Path Loss Measurement 5.2.3.3 Output Path Loss Determining the output path loss requires the "WiMAX Signaling" firmware application only. 1. Access the "WiMAX Signaling" firmware application and establish a connection between the R&S CMW and the MS, using default settings.

  • Page 54: Accuracy Considerations

    ® Test Scenarios R&S DST200 Path Loss Measurement As a general rule, the R&S CMW must be equipped with a signaling application (option R&S CMW-KSxxx) plus a measurement application (option R&S CMW-KMxxx) for every measured network standard. Input path loss After the R&S CMW has established a connection with the EUT, the reported EUT out-...
  • Page 55 ® Test Scenarios R&S DST200 Path Loss Measurement User Manual 1515.1421.02 ─ 05...

  • Page 56: Determining Path Loss Values: R&S Cmu200

    5.2.4.1 Preparatives (GSM or WCDMA) 1. Connect the N connector of your RF Diagnostic Chamber R&S DST200 to the bidirectional RF connector RF 2 of the R&S CMU200, preferably using the high- quality RF cable supplied with the RF Diagnostic Chamber.
  • Page 57 ® Test Scenarios R&S DST200 Path Loss Measurement Figure 5-12: GSM900 Signaling: Overview dialog 3. To determine the output path loss of your mobile phone, subtract the reported "RX Level" at the MS from the output level of the R&S CMU ("BS Signal – TCH Level –...
  • Page 58 ® Test Scenarios R&S DST200 Path Loss Measurement Figure 5-13: GSM900 Signaling: RF IN/OUT tab 5.2.4.3 WCDMA Path Loss 1. For a WCDMA UE, access the "WCDMA UE" function group, "Signaling" test mode, to establish a call between the R&S CMU200 and the UE. Note the power class (1 to 4) of your UE, which is displayed in the "Connection"...
  • Page 59 ® Test Scenarios R&S DST200 Path Loss Measurement Figure 5-14: WCDMA Signaling: UE Report dialog 3. To determine the output path loss of your mobile phone, subtract the reported "CPICH RSCP" of the current cell from the P-CPICH output level of the R&S CMU ("BS Signal Lvl.
  • Page 60 ® Test Scenarios R&S DST200 Path Loss Measurement Figure 5-15: WCDMA Signaling: Maximum Power dialog 5. To determine the input path loss of your UE, subtract the measured "UE Power (RMS)" (preferably, the "Average" value) from the nominal maximum UE transmit- ter output power.

  • Page 61: Maintenance

    R&S AMS32 software package. The user should verify if azimuth and elevation rotator stay at the position 0 deg within the specification limits defined by the data sheet of the R&S DST200, see PD 5214.3600.22. If the position values exceed the limits the user shall contact the local R&S service engineer.”...
  • Page 62 Spare Parts Part designation Order number Remarks VELCRO FASTENER SET To mount ABSORBER WALL at the door and ABSORBER TOP at 1514.5823.00 the top panel of the R&S DST200 ABSORBER TOP 1519.0059.00 ABSORBER WALL 1519.0071.00 ABSORBER BOTTOM A 1519.0088.00 Figure 3-4 ABSORBER BOTTOM B 1519.0036.00...

  • Page 63: Glossary: Frequently Used Terms And Abbreviations

    ® Glossary: Frequently Used Terms and Abbreviations R&S DST200 Glossary: Frequently Used Terms and Abbreviations AF: Audio frequency or antenna factor CTIA: Cellular Telephone Industries Association CWG: Converged Wireless Group DC: Direct current DL: Downlink EMI: Electromagnetic Interference EMS: Electromagnetic Susceptibility...
  • Page 64 ® Glossary: Frequently Used Terms and Abbreviations R&S DST200 TRD: Transducer factor UL: Uplink VNA: Vector network analyzer VSWR: Voltage standing wave ratio User Manual 1515.1421.02 ─ 05...

  • Page 65: Index

    Cross-Polarized Test Antenna ........27 RF ................15 DST200 Filter Panel, LP&FO ........16 tester (RF) ..............15 DST200 Interface Panel, AC Filter ......18 USB ................17 DST200 Interface Panel, RF ........16 Cross-polarized test antenna ..........27 DST200 Interface Panel, USB ........17 CTIA certification ...............
  • Page 66 ® Index R&S DST200 Test scenarios ..............47 Transmission coefficient ............ 39 Upper compartment ............11 Vector network analyzer (VNA) ......... 38 Velcro fastener hook adhesive .......... 61 Velcro fastener loop adhesive ........... 61 VNA (vector network analyzer) ......... 38 WCDMA tests ..............

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