Rohde & Schwarz CMD55 Communications Test Set
The Digital Radiocommunication Testers CMD have evolved from GSM900 mobile station testers to a fully equipped test and measurement solution for mobiles and handhelds for all GSM-based systems as well as DECT.
CMD is the industry standard in mobile radio testing and defines the levels that others are judged by. With extremely high market acceptance worldwide, the family will stay in the lead thanks to constant innovation, a well-chosen modularity through different models and optional extension.
CMD addresses all aspects of test and measurement applications from production and service to development and quality assurance.
Features
CMD55
GSM900, GSM1800 and GSM1900
Testing of handover from GSM 900 and back
Other features as CMD52
Meeting the Challenges of Modern Communications
Go/nogo tests and comprehensive testing of mobiles
Powerful signalling capabilities
Short measurement time ensuring high throughput
High measurement accuracy
Simple interactive operation
No specialized GSM knowledge required
Service mode for exact fault location
Autotest - complete mobile testing at a keystroke
Very fast remote control operation
Compact and lightweight
Excellent price/performance ratio
Manual Operation Philosophy
Research and development engineers have found the CMD's large clear LC display and user interface with logically structured menus unsurpassed when measuring RF parameters. This is true both in the manual test mode and in the flexible module test with system-specific signal generator and burst analyzer. During call setup the network and system-specific signaling parameters allow the R&D engineers to control the influence of signaling parameters on the mobil's behaviour in the network.
The mobile communications market is growing beyond anybody's imagination and the need for testing has therefore become equally demanding.
As the leading manufacturer of type-approval test systems for several world-wide digital wireless standards, Rohde&Schwarz has succeeded in combining these standards in one family of instruments, aimed at users in production, service and development.
This data sheet covers the testers for GSM mobiles as well as for DECT fixed and portable parts (FP and PP). (For GSM base station testers see data sheet PD 757.1231).
CMD65 - our top model of mobile testers - combines a number of well-known key features of the CMD family. The four most common digital systems in one instrument, ready at a keystroke, provide the user with ultimate flexibility.
User-definable Autotest
The user-friendly display and operation of the CMD is a main requirement when testing manually, but for automated testing, the engineer wants a quick and easy way to a ready-made autotest or he has to create his own test script for the specific task to be performed. The CMD family of testers offers different ways of creating such autotests and test scripts, depending on the CMD model and the test requirements.
From the main menu, the CMD65 offers very easy access for up to four digital networks and their configuration menus, measurements and tests as well as autotest function.
CMD53 and CMD55 offer full GSM functionality including the handover between GSM bands.
To start out with a single standard, Testers CMD50, CMD52 (GSM900) and CMD60 for DECT applications are the right choice.
Adding another standard later - no problem, as the clearly laid-out up-grade path depicted on the back cover fold-out will demonstrate.
Fast IEEE-bus
In a production line there are two main factors that contribute to high throughput and product quality: IEC/IEEE-bus speed and measurement repeatability.
The CMD offers the fastest IEEE-bus operation available. With combined measurements and measurements like RF peak power which takes only milliseconds, time-consuming power level adjustments where multiple measurements are required are completed in seconds. The level of measurement repeatability offered ensures the highest possible quality of the end product leaving the factory.
Covering Any Need for Test Modes
Service and repair of digital mobiles and cordless phones call for a variety of tests, ranging from simple go/nogo tests to complete factory-like production tests and calibration of the phone. The CMD range offers cost-effective solutions for manual testing, stand-alone autotest, as well as remote RS232 operation solutions covering any need for testing. Every CMD comes, of course, with the same large display and user interface for manual test of phones and/or modules and RS232 interface for remote operation.
Base Station Survey Measurements
These are often done on real base stations or by using analog signal generators with power amplifiers. The CMD is able to simulate any GSM base station BCCH, including parameters like MCC, MNC, NCC, BA list, DTX and DRX information. These and the "cell barred" feature enable close-to-life conditions without having to use a real BTS.
GSM900, GSM1800 & GSM1900
Testing of handover
Frequency setting time: 3ms
Harmonic: -30 dBc
Peak Power Meter
GSM-spec Voltage & Cur meas
Hi-lvl RF Output/sens RF input
Hi-speed processor inc 8MB RAM
Modification for fast BER
Special Converter