Rohde & Schwarz CMD57 Communications Test Sets
Features
Complete Range of Transmitter and Receiver Measurements
Large Illuminated LCD Display for Fast Reading of Parameters and Measured Values
Menu-guided User Interface for Quick Tests as Well as for In-depth Analysis
Softkey Control with Display of All the Important Parameters Enabling Operator to Work Error-free
Extremely Short Setting and Measuring for Both Manual and Remote Control via IEEE Bus
Abis Control Options Available
In-service Testing Option
Applications
GSM 900, DCS 1800, and PCS 1900 Base Station Measurements
Manufacturing, Installation, and Maintenance
CMD 57 Digital Radiocommunication Tester
The CMD 57 Digital Radiocommunication Tester is a compact unit for testing GSM, DCS 1800 and PCS 1900 base stations (BTS) and BTS modules. It allows measurements on base station transmitters and receivers without affecting calls in progress. With the in-service test option, measurements can be made without taking a cell site out of service.
Detailed Knowledge Not Required
The CMD 57 is easy to use and is equally at home in production, installation and service environments. Ease of use goes beyond the front panel. All parameters can be individually modified in the configuration menu to allow easy adaptation to stringent user-specific tolerances. Any parameters that have modified with respect to the default standard specifications are clearly shown on the display.
Additional attenuators, cables, and amplifiers are often required for connecting to the BTS. The effect of these additions are taken into account by the CMD 57 when calculating the measurement results.
Test Your Transmitter
The following GSM/DCS/PCS specific measurements are available for transmitter testing:
Mean RF carrier power
Power ramping
Phase/frequency error
Spectrum due to modulation
Spectrum due to switching
Measurements results on the transmitter's traffic channel (TCH) are obtained by simply switching to the corresponding menu. The results are graphically displayed along with applicable statistical functions.
... and Receivers Too
You can also make the required tests on receivers.
Bit error rate (BER)
Adjacent time slot rejection
Plus Many Other Measurements
You can also make may other base station measurements with the CMD 57 including:
Echo test
Module tests without signaling or time synchronization
Alignment using built-in multifunction RF generator
AF measurements with optional frequency counter