News from Rohde & Schwarz
Magazine for test & measurement and radio communication
News from Rohde & Schwarz Issue 2000/III - 168
GSM Interference Analyzer ROGER (TS9958): Full-coverage, mobile and automatic measurement of GSM interference
When you compare the load carried by the channels of today’s GSM networks with road traffic, GSM is constantly on the brink of the rush hour. New transmission methods such as GPRS and EDGE will soon have completed the pilot phase all over the world and fill remaining channel resources with packet data. Then, at the latest, high network quality will be a decisive factor in order to be competitive, and this means no or only insignificant interference. Plus, the higher the channel load, the less effective is frequency hopping, which is today successfully used against interference.
GSM Interference Analyzer ROGER (TS9958): Full-coverage, mobile and automatic measurement of GSM interference
Test cells for investigating emission and susceptibility: Attractively priced alternatives to the anechoic chamber
Measurements to verify the compliance of electronic equipment with regulations regarding emission of and susceptibility to interference either necessitate a laboratory of your own or you have to call on the services of an external provider. Both can be very expensive, especially for small and medium-sized companies that have to carry out such measurements quite often. The alternative is a compact system enabling precompliance measurements and preparation for final acceptance in your own development lab. Rohde & Schwarz offers several test cells covering the frequency range 150 kHz to 40 GHz that can also be equipped in part with climatic chambers.
Test cells for investigating emission and susceptibility: Attractively priced alternatives to the anechoic chamber
Universal Radio Communication Tester CMU200: Successful mobile-radio tester now with US TDMA and AMPS standards
Universal Radio Communication Tester CMU200 is proving itself as a tester for all GSM versions in many mobile-phone production lines all over the world. Now it comes with two extra functions for non-GSM networks - the US TDMA (IS-136) and AMPS standards. Unlike the situation in Europe, there are three competing digital mobile-radio networks in the United States: GSM, CDMA (IS-95) and TDMA (IS-136). Outside the USA, TDMA is becoming increasingly important in South America, which means a significant enlargement of its market. And there is a fourth system, analog AMPS, which serves as the second mode in CDMA and TDMA mobiles, so that a radio tester for their production and service must be able to handle the standard of the first-generation network too.
Universal Radio Communication Tester CMU200: Successful mobile-radio tester now with US TDMA and AMPS standards
Universal Radio Communication Tester CMU200: Speeded-up test of GSM mobiles without signalling
Searching for ways to improve throughput in the production of mobile phones seems to be heading for complete avoidance of signalling in the production test. In pursuit of this trend, Universal Radio Communication Tester CMU200 provides comprehensive options in two operating modes for GSM measurements without signalling: unsynchronized measurement in the functional group "GSM non-signalling" and synchronized measurement with disabled signalling in the functional group "GSM signalling".
Universal Radio Communication Tester CMU200: Speeded-up test of GSM mobiles without signalling
Digital Video Quality Analyzer DVQ: DVQ remotely controlled:central monitoring of digital picture quality
The Quality ExplorerTMoption (DVQ-B1) further enhances the excellent realtime analysis capability of DVQ, adding the ease of operation and flexibility of a WindowsTM PC. It allows easy configuration of the analyzer via the Ethernet or RS-232-C interface. The Quality ExplorerTM - package includes a programming interface for custom Windows applications as well as Elementary Stream AnalyzerTM - software and Quality Monitor software. With these two programs, each commercial PC, in conjunction with one or more DVQs, becomes a compact, easy-to-operate monitoring center for digital picture quality.
Digital Video Quality Analyzer DVQ: DVQ remotely controlled:central monitoring of digital picture quality
Digital Video Quality Analyzer DVQ: The key to high picture quality
Since its introduction about two years ago, Digital Video Quality Analyzer DVQ has ranked as a pioneer in objective picture quality analysis. The new conditional-access options for pay TV, the SNMP remote interface and the extra reference measurement function make DVQ an ideal, future-proof platform for ensuring quality of service in many areas of digital TV.
Digital Video Quality Analyzer DVQ: The key to high picture quality
Refresher topic: Measurements on MPEG2 and DVB-T signals (1)
With the expansion of multi-frequency networks (MFNs) and single-frequency networks (SFNs) for DVB-T*, there is a growing demand for measuring instruments and techniques for this modern transmission method. The instruments used for analog TV are not suitable for DVB apart from a few exceptions like spectrum analyzers and thermal power meters.
Refresher topic: Measurements on MPEG2 and DVB-T signals (1)
I/Q Simulation Software WinIQSIMTM: CDMA2000 test signals in unrivalled variety
I/Q Simulation Software WinIQSIMTM generates test signals not only for ready established WCDMA (3GPP-FDD), IS-95 und multicarrier systems but now also for the forward link and reverse link of CDMA2000 - and in unmatched variety.
I/Q Simulation Software WinIQSIMTM: CDMA2000 test signals in unrivalled variety
Test Hints: Microwave Signal Generator SMR as tracking generator for EMI Test Receiver ESI
The four models of the SMR family of signal sources cover the frequency range up to 20 GHz (SMR20), 27 GHz (SMR27), 30 GHz (SMR30) and 40 GHz (SMR40). Their primary advantages are compact dimensions in conjunction with very high performance and an extremely attractive price. The EMI test receivers of the ESI family combine the flexibility and speed of spectrum analyzers with the large dynamic range required for standard-compliant EMI mea surements. Software FreRes from Rohde & Schwarz ideally couples these two instruments for elaborate RF mea surements on active and passive microwave components up to 40 GHz.
Test Hints: Microwave Signal Generator SMR as tracking generator for EMI Test Receiver ESI
Spectrum Analyzers R3267 and R3273 from Advantest: Versatile complete solution for testing WCDMA/3GPP systems
In various European countries UMTS licenses are being auctioned off or awarded, accompanied by slogans like "mobile into the Internet, surf with your mobile, WCDMA, 3GPP", etc. What it is all about is the next, the third generation of mobile radio. The Japanese corporate group NTT led the way, being worldwide the first to put into operation a WCDMA network in line with the NTT DoCoMo standard. Advantest offers a measurement solution for the WCDMA standard which will in future also be effective in Europe.
Spectrum Analyzers R3267 and R3273 from Advantest: Versatile complete solution for testing WCDMA/3GPP systems
Application Notes: MIP monitoring in single-frequency networks
Following its successful implementation in satellite and cable systems, digital transmission of TV signals is now also making its entry into terrestrial networks. Besides efficient data compression and flexible multiplexing in line with MPEG2 standards, single-frequency networks (SFNs) allow the best possible utilization of scarce terrestrial frequencies. Such networks are controlled by MIPs (megaframe initialization packets). Prerequisites for the working of an SFN are correct MIP generation and transmission plus continuous monitoring to avoid malfunctions or network failures.
Application Notes: MIP monitoring in single-frequency networks
Application Notes: Remote monitoring via Ethernet
In production testing, central monitoring of the measuring instruments for remote maintenance and diagnostics is frequently required. With the optional LAN interface (FSP-B16) the new FSP Spectrum Analyzer Family is ideal for use in production environments. The interface allows access to all common Ethernet systems with transmission speeds of 10 Mbit/s (10Base-T) and 100 Mbit/s (100Base-T), thus opening up a variety of new applications.
Application Notes: Remote monitoring via Ethernet
Panorama: Spectrum monitoring and management system for Sri Lanka Electromagnetic waves do not stop at frontiers
It is always interesting to watch TV or listen to radio programs from across the border. If a transmitter in a neighbouring country broadcasts at the same frequency as one in your country however, the pleasure may be short-lived, since reception will be disturbed by interference. So it is indispensable to coordinate allocation of transmitter frequencies - a job for national regulatory authorities. In Sri Lanka,
for instance, Rohde & Schwarz has installed a nationwide Spectrum Monitoring and Management System ARGUS-IT that is described here. This system is suitable for the mission of regulatory authorities.
Panorama: Spectrum monitoring and management system for Sri Lanka Electromagnetic waves do not stop at frontiers
HF Receiver EM010: Digital VXI-based HF receiver with broadband IF output
For a number of years Rohde & Schwarz has been producing digital receivers for search and monitoring applications. HF Receiver EM010 is the first receiver based on the VXI standard for use as a plug-in in medium-sized to large radio reconnaissance systems with multiple receiving channels.
HF Receiver EM010: Digital VXI-based HF receiver with broadband IF output
Test hints: Fast and precise measurement of low RF levels
Some mea surements require very low and highly accurate RF levels (typically -100 dBm to -110 dBm), eg for the BER (bit error rate) of digital communication receivers. This test hint summarizes how to calibrate extremely precisely the levels of signal generators and communication testers used for BER measurements.
Test hints: Fast and precise measurement of low RF levels
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/
radiocommunications -
test and measurement -
broadcasting -
it security
sitemap