News from Rohde & Schwarz
Magazine for test & measurement and radio communication
News from Rohde & Schwarz Issue 2001/III - 172
BluetoothTM qualification in development and quality assurance: RF Test System TS8960
An essential precondition for the success of Bluetooth* technology is the interoperability and undisturbed function of different products. To ensure this, the Special Interest Group (SIG) has defined a qualification program that has to be passed by every product to be marketed under the Bluetooth label. The Test System TS8960 has been designed for RF measurements in line with the
Bluetooth qualification program and for in-depth measurements in development and quality assurance.
BluetoothTM qualification in development and quality assurance: RF Test System TS8960
Trunked radio technology for Europe ’s most advanced combat training center: TETRA Trunked Radio System ACCESSNET ®-T
The "Letzlinger Heide" training area of the German Armed Forces is the most advanced combat training center in Europe. Up to 2500 soldiers can practise with their vehicles within an area of approx. 500 sq km. Their combat activities are recorded and monitored fully electronically under realtime conditions.
Trunked radio technology for Europe ’s most advanced combat training center: TETRA Trunked Radio System ACCESSNET ®-T
Standard-conforming BluetoothTM tests with Signal Generator SMIQ: Application Software SMIQ-K5
The Bluetooth Test Specification [1] stipulates defined procedures for tests on Bluetooth transmitter and receiver modules. To test such modules in line with the specification, standard-conforming data packets are needed. With the PC-based Application Software SMIQ-K5 and the Vector Signal Generator SMIQ, it is now easy to generate the most common data packets for receiver measurements.
Standard-conforming BluetoothTM tests with Signal Generator SMIQ: Application Software SMIQ-K5
Multislot measurements on HSCSD and GP S mobile phones: Universal Radio Communication Tester CMU200
There is an increasing trend in mobile radio towards fast data transmission. Mobile Internet access, in
particular, opens up new applications for network operators. Here, too, the CMU200 offers full test functionality for HSCSD and GPRS mobiles in development and production.
Multislot measurements on HSCSD and GP S mobile phones: Universal Radio Communication Tester CMU200
Audio measurements on mobile phones: Universal Radio Communication Tester CMU200
Audio measurements on mobile phones are highly important because voice transmission quality is a
significant factor in the users’ satisfaction with the day-to-day use of their mobiles. Moreover, an increasing number of mobile phones are fitted with additional audio components such as FM stereo radios, MP3 players or voice recorders. Using the CMU-B41 audio option, the Universal Radio Communication Tester CMU200 performs virtually all audio measurements on mobile phones quickly and precisely.
Audio measurements on mobile phones: Universal Radio Communication Tester CMU200
FSP goes outback - tough test in Australia: Spectrum Analyzer FSP
The global positioning system (GPS) provides precise navigation data and time information throughout the world. Unfortunately, however, the system is susceptible to electro-magnetic interference. In large-scale trials recently carried out in the Australian outback, members of the US and
Australian armed forces examined ways of locating sources of such interference in order to take counter-measures.
FSP goes outback - tough test in Australia: Spectrum Analyzer FSP
Ideal calibration source for weather radar receivers: Microwave Signal Generator SMR
Calibrated weather radar equipment is indispensable for precisely determining the precipitation probability, as well as the density of rain, snow or fog. The calibration method necessary for these applications requires a signal generator with a highly accurate output level. Thanks to its care-fully
thought-out design with firmware supported level correction, the Microwave Signal Generator SMR
(FIG 1) is the ideal signal source for this task.
Ideal calibration source for weather radar receivers: Microwave Signal Generator SMR
Allrounder with excellent vector modulator: Vector Signal Generator SMV03
With the addition of the SMV 03 (FIG 1), which comprises a vector modulator with analog I/Q inputs
for the frequency range from 9 kHz to 3.3 GHz, Rohde & Schwarz has extended its range of successful economy Signal Generators SML [1]. The RF modulation bandwidth of 100 MHz makes the new generator the ideal choice for all applications involving high data rates.
Allrounder with excellent vector modulator: Vector Signal Generator SMV03
Comprehensive EMI and EMS measurements at a keystroke: EMC Measurement Software EMC32
The EMC Measurement Software EMC32 combines electromagnetic interference (EMI) and electromagnetic susceptibility (EMS) measurements under an intuitive user interface, and is provided with an open interface for further processing and archiving of the measurement results.
Comprehensive EMI and EMS measurements at a keystroke: EMC Measurement Software EMC32
Five specialists in production: test signals for all digital standards: TV Test Transmitter SFL
In broadband communication networks and in satellite and terrestrial transmission, the changeover
from analog to digital TV transmission is well under way. Receivers and set-top boxes for digital reception are being produced in large quantities for the consumer market. The TV Test Transmitter Family SFL has been developed by Rohde & Schwarz to test these receivers. The SFL test transmitters offer all the features required of modern test transmitters in produc-tion: wide frequency range, comprehensive modulation modes, high reliability - and all this at an attractive price.
Five specialists in production: test signals for all digital standards: TV Test Transmitter SFL
Digital multistandard platform for the analysis of QAM-modulated signals: TV Test Receiver EFA
When it comes to selecting TV programs, digital cable TV provides many consumers with an alternative to the digital terrestrial TV networks and the established DVB-S standard. Digital cable technology allows a return channel to be used within the same physical layer (coaxial cable),
enabling consumers to send back information to the cable headend (e. g. for Internet access, video on demand, etc). The barrier between data communication equipment and TV networks is now smaller than ever before. As a result, there is an increasing demand for measuring instruments capable of
performing a wide variety of measurements in a very short time. The new Test Receivers EFA are fully fit to perform these measurements.
Digital multistandard platform for the analysis of QAM-modulated signals: TV Test Receiver EFA
Always "on air" through automatic switchover: (n+1) standby configuration of TV transmitters
Network operators require their programs to be almost 100% available "on air2. This applies to public broadcasting companies, which have to fulfill public functions, and to commercial service and program providers with their own networks, who are liable to considerable penalties or loss of earnings from advertisements if their programs are not constantly available. Reliability is a particularly critical point in digital TV where several programs are transmitted by a single transmitter station. This high level of program availability is ensured by the modern, favourably priced (n+1) standby transmitters from Rohde & Schwarz.
Always "on air" through automatic switchover: (n+1) standby configuration of TV transmitters
Digital TV standard ATSC for Transmitter Family Nx700x: Exciter SV700
With the market launch of the TV Transmitter Family Nx700x [1, 2], a new exciter has been introduced which is capable of handling the European DVB-T standard for terrestrial broadcasting of digital programs in addition to analog TV standards. The range of transmission methods supported by this exciter has now been completed by an encoder for the digital terrestrial ATSC standard
currently used in the United States and parts of Asia, which will replace the analog NTSC standard in the medium term.
Digital TV standard ATSC for Transmitter Family Nx700x: Exciter SV700
Increasing DAB availability, decreasing downtime cost: DAB Redundancy Concept DM001-R
If a multiplexer in a DAB transmitter network fails, this may have fatal consequences. Depending on the network’s architecture, a multiplexer failure may cause a local, regional, or even countrywide loss of programs. The DAB Multiplexer DM001 from Rohde & Schwarz (FIG 1) is the central element in a DAB transmitter chain. High availability of the multiplexer is vital for reliable operation. The use of the service transport interface (STI) in the new DM001/ STI and a redundancy concept offer network operators many advantages.
Increasing DAB availability, decreasing downtime cost: DAB Redundancy Concept DM001-R
Measurements on MPEG2 and DVB-T signals (4): Continued from No. 170
Part 3 of this refresher topic dealt with masks for out-of-band components and the measurement of the shoulder distance. In this contribution, the emphasis is on the determination of the crest factor and power measurements on medium-power DVB-T transmitters.
Measurements on MPEG2 and DVB-T signals (4): Continued from No. 170
Secure communication - protected against data thieves: Crypto Mobile Phone TopSec GSM
Flexibility and mobility are key factors to success; up-to-the minute information and quick decisions have become more important in industry and politics than ever before. Mobile phones are often used to pass on information quickly. Users become more and more aware of the fact that enormous secu-rity
problems may arise. The usual means of communication - telephone, mobile phone, fax, mail - are the
main sources that attract data thieves. Damage caused by industrial espionage in Germany is estimated to run into at least 20 billion marks every year.
Secure communication - protected against data thieves: Crypto Mobile Phone TopSec GSM
CCDF determination - a comparison of two measurement methods: Test Tip
Measurement of the CCDF (complementary cumulative distribution function) is often used for evaluating nonlinearities of amplifiers or transmitter output stages, for instance (see also refresher topic on page 44). This measurement indicates how often the observed signal reaches or exceeds
a specific level. From a physical point of view, the CCDF measurement is the integral of the distribution function versus the level (integration of the observed level to infinity). Comparison of measured values and theoretical reference values (which can be determined for OFDM or mQAM/ VSB) quickly yields information on the nonlinear response of all types of active elements. However, the great advantage of the CCDF measurement is that the useful signal itself is analyzed; as a result, it is not necessary to
transmit complex test sequences. This test tip compares two different measurement methods.
CCDF determination - a comparison of two measurement methods: Test Tip
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