The Rohde & Schwarz SM300 is a 3 GHz signal generator delivering analog and vector modulation capabilities for RF testing across laboratory, service, and production environments. It generates AM, FM, phase-modulated, and digitally modulated signals with I/Q vector modulation support up to 40 MHz bandwidth. The instrument combines precise frequency control, low phase noise, and configurable output levels from -127 dBm to +13 dBm, making it suitable for wireless standards validation, EMC compliance testing, and baseband signal integration.
Technical Specifications
Frequency Performance
• RF range: 9 kHz to 3 GHz
• LF range: 20 Hz to 80 kHz
• Frequency resolution: 0.1 Hz
• Frequency setting time: <10 ms
• Phase noise (SSB): <-95 dBc (1 Hz) at 1 GHz, 20 kHz offset
Output Characteristics
• Power range: -127 dBm to +13 dBm
• Level resolution: 0.1 dB
• Level uncertainty: -120 dBm)
• Level setting time: <200 ms
Modulation & Signal Generation
• Analog modes: AM, FM, phase modulation
• Pulse modulation: supported
• Vector (I/Q) modulation: DC to 40 MHz bandwidth
• Internal modulation generator: 20 Hz to 80 kHz
• WCDMA test signals: ACLR (54–55 dB), EVM (3.3% typical)
• GSM signals: phase error 1.2° rms typical
• WLAN: IEEE 802.11b/g capable
• Frequency and level sweep with selectable steps
– Key Features
• High-contrast TFT display: 320 × 240 pixels
• Compact form factor for desktop, portable, or 19-inch rack deployment
• USB host interface for PC connectivity and peripherals
– Typical Applications
• WCDMA, GSM, and WLAN signal generation for wireless device validation
• EMC/RFI testing per EN 61000-4-3/6, MIL-STD-461E, ISO 11451/11452 (automotive, military, avionics)
– Compatibility & Integration
Works with Rohde & Schwarz baseband sources (AM300, AMIQ) for complex modulation generation.
