News from Rohde & Schwarz

Magazine for test & measurement and radio communication

News from Rohde & Schwarz Issue 1998/I - 157

• Terrestrial digital video broadcasting – TV for the discerning: Solid-State DVB-T Transmitters NV500

  Just in time for introduction of the terrestrial digital TV standard DVB-T, Rohde & Schwarz comes up with the NV500 transmitter family. These solid-state transmitters operate in band IV/V and, thanks to modular design, transmitters with DVB output power of 250 W through 4 kW can be implemented in various standby configurations.
  Terrestrial digital video broadcasting – TV for the discerning: Solid-State DVB-T Transmitters NV500
  
  

• Power calibration up to 18 GHz: Calibration Kit NRVC

  With the introduction of ISO9000 standard specifications and the growing number of related accreditations, manufacturers of measuring equipment are required to cope with an increasing volume of calibration. On-site calibration by the manufacturer or the user is often the fastest and most cost-effective solution, especially when using Calibration Kit NRVC from Rohde & Schwarz.
  Power calibration up to 18 GHz: Calibration Kit NRVC
  
  

• The wild card in shortwave communication: Remote Control Processor GP2000

  Remote Control Processor GP2000 is the latest member in the XK2000 family of shortwave transceivers. This is a highly versatile unit for use in complex split-site applications, as a favourably priced upgrade of the HF850 transceiver family, as well as for adaptation of transceivers, transmitters and receivers of another make to the Rohde & Schwarz XK2000 standard.
  The wild card in shortwave communication: Remote Control Processor GP2000
  
  

• Help is just a call away – anytime, anywhere: Emergency Call Radio System ECRS

  More and more road traffic unfortunately means more accidents. Accidents of every kind, whether during work or leisure time, cause injuries and losses to the economy. And increases in crime are also posing a considerable threat to people, property and capital. As a consequence, immediate help in emergency situations is a must. Rohde & Schwarz Emergency Call Radio System ECRS, based on trunked radio technology, greatly improves the effectiveness and life-saving deployment of relief and rescue organizations.
  Help is just a call away – anytime, anywhere: Emergency Call Radio System ECRS
  
  

• The big little helper for CATV measurements: Spectrum Analyzer U3641N

  Spectrum Analyzer U3641N with CATV program card is the ideal tool for mobile RF measurements on CATV systems. It performs per software specific measurements to international TV standards at a keystroke. For viewing the TV picture it is equipped with a demodulator for PAL, NTSC and SECAM. U3641N is a product from the Japanese manufacturer Advantest, whose electronic and optoelectronic equipment is marketed by Rohde & Schwarz as part of a strategic alliance.
  The big little helper for CATV measurements: Spectrum Analyzer U3641N
  
  

• TDMA signals at the push of a button: Signal Generator SMIQ + Options SMIQB10/B11/B14

  Highly complex test signals and high operating convenience are both expected of a signal generator in mobile radio measurements. A few pushes of a button and SMIQ will generate test signals for all major TDMA mobile networks. It simulates uplink and downlink signals for NADC, PDC, PHS and GSM standards.
  TDMA signals at the push of a button: Signal Generator SMIQ + Options SMIQB10/B11/B14
  
  

• Measuring EMC on mobile phones:

  With increasing demand for digital telecommunications, especially in the private sector, EMC requirements placed on terminal equipment (mobile phones and base stations) are gaining more and more importance. Rohde & Schwarz offers test systems for measuring the electromagnetic compatibility of mobile radio equipment of this type in line with most of the current European standards (GSM, DCS, DECT, NMP).
  Measuring EMC on mobile phones:
  
  

• DVB: coverage measurements, program monitoring and production testing

  Introduction of digital TV to various DVB standards (satellite, cable and terrestrial transmission [1]) is fast gaining ground. DVB broadcasts have already commenced in many countries all over the world.
  DVB: coverage measurements, program monitoring and production testing
  
  

• Measuring and monitoring DVB systems:

  The output of an MPEG2 multiplexer (when measuring a transmission link) or of an MPEG2 generator produces video, audio and other data in the form of TS (transport stream) packets with a defined data rate [1]. In the German cable network for instance, this is 38.1528 Mbit/s for 8 MHz channel bandwidth and 64QAM (quadrature amplitude modulation).
  Measuring and monitoring DVB systems:
  
  

• Signal Generator SMP: automatic user correction of RF level with Power Meter NRVS or NRVD

  More and more satisfied customers are becoming familiar with the name SMP, which stands for microwave generators with excellent signal characteristics in the frequency range 10 MHz to 40 GHz [1; 2]. In the SMP signal generator family, Rohde & Schwarz has proven once more its ability to offer outstanding technical features ...
  Signal Generator SMP: automatic user correction of RF level with Power Meter NRVS or NRVD
  
  

• Measuring bit error rate of transmitter ICs with EMI Test Receiver ESMI:

  A major quality criterion in data transmission with state-of-the-art communications equipment is low bit error rate (BER). When the whole communications system – consisting essentially of data source, possibly a coder, modulator plus transmitter output stage, receiver with demodulator (and decoder) as well as data regeneration and evaluation facilities – is examined with a view to BER, attention normally focuses on the demodulator. Nevertheless, manufacturers of digital transmission equipment must also be able to characterize their products by specifying the achievable BER.
  Measuring bit error rate of transmitter ICs with EMI Test Receiver ESMI:
  
  

• Type approval of GSM900/GSM1800 multiband mobiles using System Simulator TS8915:

  Digital mobile radio networks to the European GSM standard have been divided to date into two worlds: those operating in the GSM900 frequency band (eg D1 and D2 in Germany) and networks using the GSM1800 band (eg EPlus in Germany). GSM900 offers 124 carrier frequencies in the 900 MHz band, GSM1800 up to 374 carrier frequencies in the 1800 MHz band. The standard also allows GSM900 to be extended by the E-GSM band (extended GSM), ie by another 50 channels. Although signalling in the two bands has been fully compatible as of phase 2, it is not possible for a GSM900 mobile to access the GSM1800 network because of the different frequency bands. So the GSM subscriber has had to opt for one of the two bands when purchasing his single-band mobile, which was then able to roam only in GSM900 or GSM1800.
  Type approval of GSM900/GSM1800 multiband mobiles using System Simulator TS8915:
  
  

• Application Firmware FSE-K10/K11 simplifies measuring RF parameters of GSM transmitters:

  Output signals of mobile-radio transmitters – base stations and mobile phones alike – must fulfill stringent demands in terms of modulation quality and spectral purity to ensure optimum link quality and maximum coverage, and to avoid interference with other network subscribers. The required performance has to be verified in complex and time-consuming tests defined in specifications of the various network standards.
  Application Firmware FSE-K10/K11 simplifies measuring RF parameters of GSM transmitters:
  
  

• Correct usage of quantities, units and equations (I):

  100 years ago the first German law on electrical units of measure came into force (FIG 1). This anniversary is a good opportunity of pointing out the importance of uniform scientific notation – more important than ever nowadays in the international arena. This refresher topic is limited to electrical quantities and units; a detailed description covering all areas of physics is given in [1].
  Correct usage of quantities, units and equations (I):
  
  

• New measurement functions for Radiocommunication Tester CMD55:

  Digital Radiocommunication Tester CMD55 for testing GSM mobile phones in production and high-level service environments [1] now features new measurement functions that provide additional applications and improved performance.
  New measurement functions for Radiocommunication Tester CMD55:
  
  

• Antenna calibration site of BAPT in Itzehoe:

  The German Post and Telecommunications Office (BAPT) in Mainz is a government authority responsible for, among other things, radiomonitoring and radio interference suppression. The Radio Monitoring and Inspection Service (PMD) with 53 branch offices all over Germany is equipped with state-of-the-art test and measurement equipment. Maintenance, repair and calibration of this T&M equipment are mainly carried out in BAPT workshops and calibration centers. Regular calibration ensures high precision of results including the required traceability to recognized methods and standards.
  Antenna calibration site of BAPT in Itzehoe:
  
  

• Mobile DF system for Danish Army:

  In 1993 the Danish Army drew up a concept for a new version of its mobile DAISY system (Danish Automated Intercept and Direction Finding System). The new concept was based on high operational requirements, eg 100% mobile, manual and automatic direction finding in the frequency range 0.3 to 1300 MHz (control from a mission center), search mode with optional suppression of selected frequencies and operation at both spot frequencies and through frequency bands, demodulation of AM, FM, SSB and CW signals, high bearing accuracy (maximum error after calibration 2° RMS), access by up to three operators and protection against overvoltage (lightning). And naturally user-friendliness was also a must.
  Mobile DF system for Danish Army:
  
  

• Measuring image rejection of single-sideband mixers:

  SSB mixers are used whenever the wanted signal occupies only one of the RF sidebands in frequencyconversion applications and interfering signals in the other band are to be suppressed. A mixer of this kind can be implemented by connecting a band filter ahead of the RF port of a conventional double-sideband mixer or by combining the two IF ports of an I/Q mixer via a 90° hybrid.
  Measuring image rejection of single-sideband mixers:
  
  

• Five years of Rohde & Schwarz subsidiary FTK:

  FTK Funktechnik Köpenick was founded in September 1992 as a wholly owned subsidiary of Rohde & Schwarz. FTK develops, produces and markets VHF FM transmitter systems and amplifiers worldwide for research and technical applications. It is located in the Berlin district of Köpenick, the largest and, thanks to its extensive woodlands and lakes, one of the most scenic parts of Berlin. FTK succeeded the former Funkwerk Köpenick, founded in 1949, which developed and produced a wide range of radio equipment, in particular large long-, medium- and shortwave transmitters as well as VHF sound transmitters and TV transmitter systems.
  Five years of Rohde & Schwarz subsidiary FTK:
  
  

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/IV - 156
• Issue 1997/III - 155
• 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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