Rohde & Schwarz SMIQ03B 300KHz to 3.3GHz Vector Signal Generator

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 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.