News from Rohde & Schwarz

Magazine for test & measurement and radio communication

News from Rohde & Schwarz Issue 1997/III - 155

• Support in installation and maintenance of DECT networks: DECT Signalling Test Unit PTW15

  DECT Signalling Test Unit PTW15 provides all test functions required for the installation and maintenance of DECT WLL networks and DECT PABX systems at an unrivalled price. Compact design, front-panel keypad and optional built-in battery modules make this unit suitable for use in the laboratory as well as for mobile applications.
  Support in installation and maintenance of DECT networks: DECT Signalling Test Unit PTW15
  
  

• Multiband and multimode testers for mobile-radio telephones: Digital Radiocommunication Testers CMD65 and CMD80

  Future multimode mobile phones as well as service centers’ and manufacturers’ demands for cost-effective testing of mobile phones to different network standards call for radio testers supporting several standards all in one unit. Rohde & Schwarz is ready with the solution: Digital Radiocommunication Tester CMD65 measures GSM, PCN, PCS as well as DECT mobile phones, and Digital Radiocommunication Tester CMD80 supports CDMA in several frequency bands as well as analog AMPS.
  Multiband and multimode testers for mobile-radio telephones: Digital Radiocommunication Testers CMD65 and CMD80
  
  

• Fading simulator and signal generator in one unit: Signal Generator SMIQ + SMIQ-B14

  Signal transmission between a transmitter and a receiver, in particular a mobile receiver, is strongly affected by the characteristics of the radio channel. So test signals reflecting the real conditions of mobile-radio reception are used in the development and type approval of receivers. Fading simulators are employed for such tasks. Up to now three instruments were required to generate real-life test signals: signal generator, local oscillator and fading simulator. But when Signal Generator SMIQ and its fading-simulator option are used, the required test signals can be produced in a single unit.
  Fading simulator and signal generator in one unit: Signal Generator SMIQ + SMIQ-B14
  
  

• Digital audio broadcasting – all from a single source: DAB components

  Since 1992 Rohde & Schwarz has taken part in the EUREKA 147 project for the development, testing and specification of digital audio broadcasting. The company is also a member of several working groups of the German DAB platform. These activities laid the foundations for the development of DAB products at Rohde & Schwarz – and today the company is the only supplier worldwide able to offer all essential system components from a single source.
  Digital audio broadcasting – all from a single source: DAB components
  
  

• New dimensions in Morse decoding: Morse Radio Decoder GM094

  Morse Radio Decoder GM094 serves for automatic detection of Morse messages under the particular conditions of shortwave propagation and manual keying. It relieves personnel from tedious routine tasks. Its particular advantages are that it can work around the clock without fatigue and that it runs a classification procedure distinguishing Morse from other signals.
  New dimensions in Morse decoding: Morse Radio Decoder GM094
  
  

• Single-station location with HF direction finders of DDF01x family:

  Digital Scanning Direction Finders DDF0xS and Digital Monitoring Direction Finders DDF0xM [1] can make use of the special characteristics of shortwave propagation to locate emitters in a particularly effective way with a single station (FIG 1). The algorithms required for bearing determination by the Watson-Watt or correlative interferometer method are standard in these direction finders.
  Single-station location with HF direction finders of DDF01x family:
  
  

• International ALE (automatic link establishment) standard for HF Transceiver XK2000:

  Because of the dynamic propagation conditions in the shortwave range, setting up a reliable link for this type of communication is anything but a simple task, which in the past could only be performed successfully and within relatively short time by experienced operators. Today this job has been taken over and perfected by automatic-link-establishment techniques.
  International ALE (automatic link establishment) standard for HF Transceiver XK2000:
  
  

• Analysis of compressed MPEG2 data stream for digital TV:

  Even if TV signals are digitized, compressed according to MPEG2 specifications and transmitted in line with DVB specifications, they are not free of errors and therefore need to be measured in any case. Rohde & Schwarz is worldwide the sole company to supply a complete range of measuring instruments meeting MPEG2 and DVB standards.
  Analysis of compressed MPEG2 data stream for digital TV:
  
  

• DAB monitoring:

  The world’s largest digital audio broadcasting (DAB) pilot project has been on the air in Bavaria since the autumn of 1995, providing the whole region with a wide selection of stereophonic sound programs in CD quality [1]. Rohde & Schwarz is the principal DAB equipment supplier, from modulation feed to power transmitters including associated antennas [2].
  DAB monitoring:
  
  

• ESMC-RAMON: entry into computer-aided radiomonitoring

  The ESMC-RAMON program package offers an attractively priced entry into computer-aided radiomonitoring. The universal operating software is a new option for Compact Receiver ESMC [1; 2]. Derived from Radiomonitoring System RAMON® [3; 4], it combines the two names to ESMC-RAMON thus indicating its origin. This program package is the solution for newcomers to computer-aided radiomonitoring. Its graphics interface and the standardized Windows operating concept make the user feel familiar right from the startup of the program. The scope of functions is reduced to the essential, operation is simple and the benefits of ESMC-RAMON will show after a very short period of use.
  ESMC-RAMON: entry into computer-aided radiomonitoring
  
  

• Digital modulation and mobile radio (VI):

  3.2.3 Bandwidth reduction by baseband filtering
  Digital modulation and mobile radio (VI):
  
  

• Digital Radiocommunication Test Set CRTC02 growing with GSM standard:

  The high innovation rate on the mobileradio market with new products appearing year after year forces manufacturers to make considerable efforts in development. The GSM standard is in a state of flux, with new functions and improvements continually being added. The resulting necessary modifications in the complex mobile-phone software may lead to unexpected delays in type approval if a manufacturer fails to test his mobiles to sufficient depth.
  Digital Radiocommunication Test Set CRTC02 growing with GSM standard:
  
  

• DVB-T, the new terrestrial TV standard:

  In February 1997 the voting procedure for the new terrestrial European Telecommunications Standard ETS 300 744 (in short DVB-T) ended with a unanimous vote. Thus, within about two years, a basis has been created for the terrestrial television of the future. This new standard will be applied in Europe first, and is expected to be taken up in other parts of the world too.
  DVB-T, the new terrestrial TV standard:
  
  

• New measurement functions in Digital Radio Tester CTS55:

  Digital Radio Tester CTS55 is a compact unit for testing GSM, DCS1800 and PCS1900 mobile phones in qualified service [1]. Rohde & Schwarz has now enhanced measurement and control functions, making this successful tester suitable for new fields of applications.
  New measurement functions in Digital Radio Tester CTS55:
  
  

• T&M technology from Rohde & Schwarz for EMC mobile of TÜV Rheinland Japan:

  TÜV Rheinland (Technical Inspectorate Rhineland) is based in Germany and has more than 50 overseas offices in over 30 countries. It is a private organization with international activities that can look back on 125 years of experience in the field of testing and certifying technical installations and products. The organization also acts as an advisor to government and industry on technology and safety matters. Of all the German safety standards authorities, TÜV Rheinland is one of the largest and internationally most widely known. The spectrum of items tested and inspected by TÜV Rheinland is striking: everything from an electric hair drier to a power station, from a toy train to a chemical plant.
  T&M technology from Rohde & Schwarz for EMC mobile of TÜV Rheinland Japan:
  
  

• Telescopic masts with universal control unit: New from Cologne

  For many years Rohde & Schwarz Cologne has been fitting out vehicles for radiated emission testing, fieldstrength or coverage measurements, and not only with the required instrumentation but also with telescopic masts for the antenna systems. The Cologne plant has now developed Rotor Control Unit HSRG (FIG) for telescopic masts. HSRG features high reliability, simple manual operation via the front-panel keypad as well as effective remote control via an RS-232-C interface. Of course it can be adapted to different types of rotors.
  Telescopic masts with universal control unit: New from Cologne
  
  

• Fast S-parameter measurements on four-port devices:

  A two-port device can be connected to test ports 1 and 2 of Vector Network Analyzer ZVR for measurement of its S-parameters. If the device has more than two ports however (eg an antenna diplexer with three ports or directional coupler with four ports), it is necessary to change the cabling by hand to be able to measure all the scattering parameters. With the 3-Port Adapter and new 4-Port Adapters available as accessories (ZVR-B8 and -B14) this time-consuming procedure can be avoided. Switchover between the different ports is then made with the aid of fast electronic switches.
  Fast S-parameter measurements on four-port devices:
  
  

• Fast and secure data transmission on shortwave: result of intensive research

  The sophistication of Rohde & Schwarz’s ALIS processor for automatic link setup and shortwave-link adaptability is the result of technical advances and continuous experimentation and trials [1]. By variation of the system parameters frame length, redundancy, type of modulation and frequency, the HF transceivers of the XK2000 family (FIG 1)[2] show high capability in adapting to time-variant channel quality and can achieve data rates up to 3.6 kbit/ using Modem GM2100 (max. 5.4 kbit/ and the RSX.25 protocol.
  Fast and secure data transmission on shortwave: result of intensive research
  
  

ROHDE & SCHWARZ GmbH & Co. KG

Muehldorfstrasse 15, 81671 Munich, Germany
Phone: +49 89 41 29 - 0
Fax: +49 89 41 29 12 164
e-Mail: CustomerSupport@rohde-schwarz.com
Internet: http://www.rohde-schwarz.com/

• Issue 1997/II - 154
• Issue 1997/I - 153
• Issue 1996/IV - 152
• Issue 1996/III - 151

radiocommunications - test and measurement - broadcasting - it security

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