The Rohde & Schwarz CMU300 is a universal radio communication tester for mobile phones and wireless devices across multiple network generations. Its modular architecture scales to diverse testing needs, combining an RF generator, RF analyzer, spectrum analyzer, and optional signaling capabilities in a single platform. The instrument delivers measurement speeds up to 10 times faster than previous generations while maintaining high accuracy and repeatability across GSM, GPRS, EDGE/EGPRS, and 3GPP FDD (WCDMA) standards.
Technical Specifications
• Frequency Range: 100 kHz to 2.7 GHz
• RF Generator Output Level: −130 dBm to +13 dBm
• RF Analyzer Input Level: −80 dBm to +47 dBm
• VSWR: Better than 1:1.2
• Timebase (TCXO): Frequency drift ±1 × 10⁻⁶ (5°C to 45°C); aging ±1 × 10⁻⁶/year
• Timebase (OCXO Option CMU-B11): Specified aging per option documentation
• Power Consumption: Typically below 200 W
– Key Features
• RF Switching Matrix: Four flexible N connectors; RF1/RF2 configured as duplex interfaces supporting base stations up to +47 dBm and micro base stations up to +33 dBm
• RF Outputs/Inputs: RF3 OUT (up to +13 dBm); RF4 IN (−80 dBm to 0 dBm)
• Spectrum Analyzer: Selectable resolution bandwidths, zero span mode, advanced triggering and synchronization
• Signal Generation: GSM/EDGE-specific midamble and modulation capabilities
• BER Testing: Supports BER, residual BER (RBER), and frame erasure rate (FER) for circuit-switched traffic; RF and Abis loop modes (with Option CMU-B71)
• Signaling Unit (Option CMU-B21): Mobile simulation for MOC, MTC, and location update procedures; manual IMEI/IMSI entry
• Reference Frequency I/O: Standard rear-panel input
– Supported Standards
GSM transmitter/receiver (GMSK), GPRS with all channel coders, EDGE/EGPRS (software option), 3GPP FDD (WCDMA with hardware/software options for FDD transmitter testing and signaling)
