The Rohde & Schwarz SMIQ03B is a vector signal generator engineered for precision generation of complex modulated signals across 300 kHz to 3.3 GHz. Built on digital signal processor (DSP) technology, it delivers high-fidelity analog and digital modulation with exceptional spectral purity and phase noise performance. The instrument addresses research, development, production, and type-approval testing with versatile signal generation and deterministic modulation control.
Technical Specifications
Frequency Performance
• Frequency range: 300 kHz to 3.3 GHz
• Frequency resolution: 0.1 Hz
• Frequency setting time: <3 ms (without mechanical attenuator switching)
• Fast restore mode (≤3.3 GHz): <500 µs
Output Level
• Output range: −140 dBm to +13 dBm (±16 dBm with option)
• Output resolution: 0.1 dB
• Level setting time: 5 MHz offset): −136 dBc to −138 dBc typical across operating band
• Broadband noise (vector modulation): −136 dBc to −140 dBc typical
• Harmonics: −30 dBc; Non-harmonics: −60 dBc
• Spurious components: <−74 dBc
Modulation Capabilities
• Analog modulation: AM, FM, Pulse, Phase
• Digital modulation: Multiple radio protocols via DSP technology
• Simultaneous analog/digital modulation supported
• Broadband I/Q modulator standard
Internal Modulation
• AF generator: 0.1 Hz to 1 MHz
• Phase offset: 0.1° increments
• Sweep functions: RF, AF, and level sweep (user-programmable); step sweep for frequency, power, and list modes
Stability
• Time base aging: 1×10⁻⁶/year (post 30-day operation); <1×10⁻⁹/day
• Temperature stability (0°C to 50°C): 2×10⁻⁶
– Key Features
• List mode trigger capability with <800 µs response (f ≤ 3.3 GHz)
• IEEE-488 (GPIB) and RS-232 interfaces for remote control and external modulation data
• Benchtop form factor
• Maximum DC voltage rating: 35 V
– Typical Applications
Radio protocol validation and simulation; development of DECT, GSM EDGE, PDC, PHS, NADC, and TETRA systems; laboratory characterization of receiver performance; manufacturing test of RF modules and subsystems.
– Compatibility & Integration
Digital modulation options support DECT, GSM EDGE, PDC, PHS, NADC, and TETRA standards. GPIB/RS-232 connectivity enables integration into automated test environments.
