Seibersdorf Laboratories RefRad X Manual
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Seibersdorf Laboratories RefRad X Manual

Reference radiator. field sourceand comb generator.
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RefRad X - Field Source
and Comb Generator
FibreLink X
LISN Coupler
MANUAL
RefRad X - Reference Radiator Model X

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Summary of Contents for Seibersdorf Laboratories RefRad X

  • Page 1 RefRad X - Field Source and Comb Generator FibreLink X LISN Coupler MANUAL RefRad X - Reference Radiator Model X...
  • Page 3 MANUAL RefRad X RefRad X – Field Source and Comb Generator FibreLink X LISN Coupler 17.07.2012 Version 2.2...
  • Page 4 Seibersdorf Labor GmbH EMC & Optics – RF-Engineering T +43(0) 50550-2882 | F +43(0) 50550-2881 rf@seibersdorf-laboratories.at www.seibersdorf-laboratories.at/rf VAT no.: ATU64767504, Company no. 319187v, DVR no. 4000728 Bank account: Erste Bank, sort code 20111, account no. 291-140-380-00 | REFRAD X MANUAL SEIBERSDORF LABORATORIES...

  • Page 5: Table Of Contents

    3.3. Field Source Set (RR 5) ........................11 3.4. Field Source Set, Sync Mode (RR 6) ....................12 DESCRIPTION OF THE REFRAD X SYSTEM COMPONENTS AND ACCESSORIES ....13 4.1. RefRad X Comb Generator ......................15 4.2. Conical Antenna Element ......................... 17 4.3.
  • Page 6 | REFRAD X MANUAL SEIBERSDORF LABORATORIES...

  • Page 7: Introduction

    This manual describes in detail the application of the RefRad X and its accessories for system check, site validation and shielding measurements. Technical specifications of the system and radiation patterns are presented.

  • Page 8: Applications

    2. APPLICATIONS Seibersdorf Laboratories offer three measurement sets containing the RefRad X and components tailored for different applications (see Chapter 3):  RefRad X Set  Field Source Set  Field Source Set, Sync Mode Application Description System Check Procedure: the well-defined field generated by the RefRad X...
  • Page 9 Application Description Coaxial System Check Procedure: check of coaxial section of conducted or radiated emission test setup using the RefRad X Comb Generator and the protective attenuator. Same procedure as System Check with Radiated Field. Advantages:  reliable identification of the fault source ...
  • Page 10 30 dB Considerations:  overload of receiver possible when no attenuator is used Shielding Attenuation Procedure: the RefRad X Field Source, Sync Mode is used as Measurement signal generator and transmit antenna to investigate the shielding attenuation of enclosures. Advantages: ...

  • Page 11: Content Of Sets

    FibreLink X Optical Fibre  Cable and Connector Table 1: Contents of different RefRad X sets Set RR 4 in price list Set RR 5 in price list Set RR 6 in price list SEIBERSDORF LABORATORIES REFRAD X MANUAL |...

  • Page 12: Accessories

    3.1. Accessories Table 2 shows the accessories available for the RefRad X and their suitability for the different sets offered. Field Source Set, RefRad X Set Field Source Set Sync Mode    LISN Coupler    Antenna Coupler Optical Fibre Cable ...

  • Page 13: Refrad X Set (Ro 10)

    3.2. RefRad X Set (RO 10) Charger RefRad X 20 dB Attenuator Figure 1: Contents of the RefRad X Set 3.3. Field Source Set (RR 5) Conical Antenna Element Transport Case RefRad X 20 dB Attenuator H-Holder and Screw Charger...

  • Page 14: Field Source Set, Sync Mode (Rr 6)

    3.4. Field Source Set, Sync Mode (RR 6) FibreLink X Transport Case H-Holder and Screw 20 dB Attenuator RefRad X, Field Source Optical Fibre Cables Fibre Connector Charger Figure 3: Contents of the Field Source Set, Sync Mode | REFRAD X MANUAL...

  • Page 15: Description Of The Refrad X System Components And Accessories

    The modular concept, the selectable line spacing and the ultra-wide frequency range make the RefRad X to a one box solution for much more flexibility in EMC and EMF testing.
  • Page 16 Receive antenna RF-cable 10 MHz receiver reference frequency Receiver Optical fibre FibreLink X Figure 5: Schematic of the RefRad X operated in field source mode with FibreLink X for Sync Mode measurements | REFRAD X MANUAL SEIBERSDORF LABORATORIES...

  • Page 17: Refrad X Comb Generator

    4.1.1. Description The comb generator RefRad X (see Figure 6) produces pulses with a repetition rate of 100 µs, 1 µs or 200 ns in time domain. These pulses represent a comb spectrum with a line spacing of 10 kHz, 1 MHz or 5 MHz in frequency domain.
  • Page 18 A resistive 50 Ω matching network is provided between the pulse generator and the output for matching purposes. The RefRad X comb generator is not designed to be operated using the battery charger as a power source. 4.1.2. Technical Specifications Technical Specifications 10 kHz –...

  • Page 19: Conical Antenna Element

    RefRad X, coaxial output 10 kHz 1 MHz 5 MHz 0.01 1000 10000 Frequenz [MHz] Figure 8: Typical coaxial output for all three line spacings 4.2. Conical Antenna Element Figure 9: Conical Antenna Element SEIBERSDORF LABORATORIES REFRAD X MANUAL |...
  • Page 20 4.2.1. Description To operate the RefRad X in field source mode, the conical antenna element (Figure 9) must be connected to the coaxial RF-output of the comb generator (see Figure 10). Figure 10: RefRad X in field source mode, mounted on the H-Holder in horizontal polarisation 4.2.2.
  • Page 21 1 MHz Spectrum 1000 10000 Frequency [MHz] Figure 11: Typical field strength measured in free space 1 and 5 MHz line spacing in 3 m distance RefRad X, 5MHz, OATS, d=10m, h=1m Horizontal Vertical CISPR 22 B 1000 Frequency [MHz]...
  • Page 22 1000 MHz -105 H-Plane Pattern, 30 - 1000 MHz -180 -165 -150 30 MHz 80 MHz -135 200 MHz 500 MHz -120 1000 MHz -105 Figure 13: Typical radiation pattern in E- and H- plane | REFRAD X MANUAL SEIBERSDORF LABORATORIES...

  • Page 23: Fibrelink X

    The 10 MHz reference frequency signal of the test receiver (or spectrum analyzer) is connected via coaxial cable (BNC connector) to the FibreLink X. With the optical fibre the reference signal is sent to the RefRad X. The green “Sync.-LED” indicates the proper synchronisation. The delivered connector allows the coupling of two cables through the filter panels.

  • Page 24: Optic Fibres And Connector

    Low battery warning Red LED - recharge Dimensions 120 x 40 x 25 mm Weight 0.15 kg Table 5: Technical specifications of the FibreLink X 4.4. Optic Fibres and Connector Figure 15: Optic Fibre and Connector | REFRAD X MANUAL SEIBERSDORF LABORATORIES...

  • Page 25: H-Holder

    Table 6: Technical specifications of the optical fibre 4.5. H-Holder Figure 16: H-Holder 4.5.1. Description The H-Holder (see Figure 16) is used for mounting the RefRad X in horizontal orientation onto a tripod or stand. Figure 17 shows the proper mounting. SEIBERSDORF LABORATORIES REFRAD X MANUAL |...
  • Page 26 RefRad X). RefRad X Field Source Screw H-Holder Stand with ¼“ worm Figure 17: Mounting the RefRad X in horizontal polarization (left) and vertical polarization (right) 4.5.2. Technical Specifications Technical Specifications ® Material Plexiglass Dimensions 144.5 x 144.5 x 36 mm...

  • Page 27: Charger

    Figure 18: Charger 4.6.1. Description The built-in batteries of the RefRad X and the FibreLink X are charged with the enclosed Ansmann ACS 110 Traveller charger. Due to the switch mode power supply and an exchangeable primary plug set, worldwide use is possible.

  • Page 28: Protective Attenuator

    An attenuator is delivered together with the RefRad X for conducted measurements to protect the measurement instruments (receiver or spectrum analyzer) from overload and damage. The attenuator has to be connected between the output of the RefRad X and the input of the measurement instrument. 4.7.2. Technical Specifications...

  • Page 29: Transport Case

    4.8. Transport Case Figure 20: Transport Case 4.8.1. Description A transport case is available for safe storage and transportation of the RefRad X and all its available accessories. 4.8.2. Technical Specifications Technical Specifications Dimensions of transport case 65 x 47 x 22 cm Weight of empty case 4.805 kg...

  • Page 30: Lisn Coupler

    4.9.1. Description The LISN coupler is used for a check of conducted emission test setup using the RefRad X comb generator (10 kHz spectrum). The LISN coupler feeds the RF-signal from the RefRad X into the LISN in a well-defined way (see Figure 22).
  • Page 31 For your personal protection you have to check the electrical safety in regular intervals in accordance with relevant applicable regulations. You Coupler is supplied with power from the LISN, which is used on a residual-current circuit- breaker free electrical circuit, so check protective earth before mains connection. SEIBERSDORF LABORATORIES REFRAD X MANUAL |...

  • Page 32: Antenna Coupler

    Balanced Dipole Connection cable 1.5 m coaxial cable with N-Type male connector CU 8250 Type Suitable for PCD 8250, PCD 3100 from Seibersdorf Laboratories 30 MHz – 3 GHz Frequency range CU 6112 Type Suitable for BiLog CBL 6112A from Schaffner Chase 30 MHz –...

  • Page 33: Software Calstan 10.0

    1500 MHz CPU 256 MB RAM 50 MB HDD Additional hardware National Instruments GPIB card Installed software .NET framework version 3.5 (or higher) National Instruments Runtime Table 13: Technical specifications of the software CalStan10.0 SEIBERSDORF LABORATORIES REFRAD X MANUAL |...

  • Page 34: Operation And Application

    5. OPERATION AND APPLICATION A properly charged RefRad X comb generator is required for all measurements. The colour of the operation LED is green when the battery voltage is OK and red when the voltage is low. Do not use the comb generator when the operation LED is red.
  • Page 35 The FibreLink X is for synchronisation of the RefRad X with an external 10 MHz reference frequency signal via optical fibre. Due to the external synchronisation a much smaller resolution bandwidth can be adjusted and therefore a much higher dynamic range is achievable. A better performance for measuring signals near the noise level is the outcome.

  • Page 36: System Check With Radiated Field

    It is apparent that the received signal is different (sometimes lower, sometimes higher) than the reference signal. Therefore detection of a failure can be difficult if a limited frequency range is only investigated (e.g. GSM 900). | REFRAD X MANUAL SEIBERSDORF LABORATORIES...
  • Page 37 Monopole Defective(150) 1000 10000 Frequency [MHz] Figure 25: Functional check with the field source positioned 150 mm in front of the PCD 8250 antenna, showing (a) a well working and (b) a defective system SEIBERSDORF LABORATORIES REFRAD X MANUAL |...

  • Page 38: System Check With Antenna Coupler

    EUT present in 1 m distance from the antenna. In the lower graph the result of a system check with several typical antenna problems is shown. It is apparent that the received signal has changed by more than 3 dB because of the problems. | REFRAD X MANUAL SEIBERSDORF LABORATORIES...
  • Page 39 RefRad 3000 with CU8250 and PCD 8250 CU8250 Reference CU8250 Defective 1000 10000 Frequency [MHz] Figure 26: System check using the CU8250 antenna coupler on the PCD 8250 antenna showing (a) a well working and (b) a defective system SEIBERSDORF LABORATORIES REFRAD X MANUAL |...
  • Page 40 Frequency [MHz] Figure 27: Results of a system check (difference between reference and check measurement) using the CU6112 antenna coupler on the bilog antenna CBL6112A, showing (a) a well working and (b) a defective system | REFRAD X MANUAL SEIBERSDORF LABORATORIES...

  • Page 41: Coaxial System Check

    The coaxial system check is used to distinguish the source of error. To perform this check a prior reference measurement is required. This should be done by connecting the RefRad X comb generator via the protective attenuator to the receive cable.

  • Page 42: Additional Equipment

    Signal Generator 10 MHz ref. OUT 10 MHz ref. IN FibreLink X FibreSync X Optical fibre Figure 30: Schematic of the FibreLink X and FibreSync X connected to a test receiver and a signal generator. | REFRAD X MANUAL SEIBERSDORF LABORATORIES...
  • Page 43 5 hours Yellow LED - recharge recommended Low battery warning Red LED - recharge Synchronisation Green LED Dimensions 120 x 40 x 25 mm Weight 0.15 kg Table 14: Technical specifications of the FibreSync X SEIBERSDORF LABORATORIES REFRAD X MANUAL |...
  • Page 44 | REFRAD X MANUAL SEIBERSDORF LABORATORIES...

  • Page 45: Literature And Information

    Techniques”, 7-th International Symposium on Electromagnetic Compatibility and Electromagnetic Ecology, June 26-29, Saint-Petersburg Alexander Kriz, Wolfgang Müllner: „Validierung von EMV Emissionsmessplätzen im Frequenzbereich 1 GHz bis 18 GHz nach dem Site VSWR Verfahren“, e&i, ÖVE Verbandszeitschrift, Heft 1-2.2006 SEIBERSDORF LABORATORIES REFRAD X MANUAL |...

  • Page 46: Figures

    Figure 9: Conical Antenna Element ......................17 Figure 10: RefRad X in field source mode, mounted on the H-Holder in horizontal polarisation ....18 Figure 11: Typical field strength measured in free space ................19 Figure 12: Typical field strength measured above groundplane ..............19 Figure 13: Typical radiation pattern in E- and H- plane ................

  • Page 47: Tables

    Contents of different RefRad X sets ....................9 Table 2: Accessories for RefRad X sets ...................... 10 Table 3: Technical specifications of RefRad X Comb Generator ..............16 Table 4: Technical specifications of the conical antenna element .............. 18 Table 5: Technical specifications of the FibreLink X ...................
  • Page 48 | REFRAD X MANUAL SEIBERSDORF LABORATORIES...

  • Page 49: Annex I. Warranty

    Seibersdorf Labor GmbH, hereinafter referred to as the Seller, warrants that standard Seibersdorf Laboratories products are free from defect in materials and workmanship for a period of two (2) years from the date of shipment. Standard Seibersdorf Laboratories products include the following:  Antennas  Cables ...
  • Page 50 | REFRAD X MANUAL SEIBERSDORF LABORATORIES...
  • Page 52 CONTACT Seibersdorf Labor GmbH RF Engineering 2444 Seibersdorf, Austria www.seibersdorf-laboratories.at/rf Fax: +43 (0) 50550 - 2881...

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