Rohde & Schwarz SMIQ03A 300MHz to 3.3GHz Vector Signal Generator

The Rohde & Schwarz SMIQ03A is a vector signal generator delivering complex modulated signals across 300 MHz to 3.3 GHz. Built on advanced digital signal processing technology, it generates high-precision digitally modulated signals at rates up to 7 Msymbol/s without restriction on modulation modes or standards. The instrument combines a broadband I/Q modulator with outstanding vector accuracy, low error vector magnitude, and strong intermodulation suppression.

Output reaches +13 dBm to +16 dBm with power level control from −140 dBm to +13 dBm and setting times under 2.5 ms. Frequency switching occurs within 15 ms; frequency hopping capability extends to 500 µs. Spectral purity reaches −130 dBc/Hz at 20 kHz carrier offset and −136 dBc broadband noise in vector modulation mode.

The generator supports analog and digital modulation simultaneously, enabling TDMA and CDMA signal generation across major mobile radio standards including GSM, WCDMA 3GPP, IS-95 CDMA, and CDMA 2000 when equipped with optional modules.

Technical Specifications

• Frequency Range: 300 MHz to 3.3 GHz


• Output Power: Up to +13 dBm standard; up to +16 dBm available


• Power Level Range: −140 dBm to +13 dBm


• Output Level Accuracy: ±0.5 dB precision; static error vector magnitude <0.4 dB


• Frequency Setting Time: <3 ms (without mechanical attenuator switching)


• Frequency Switching Time: 15 ms


• Output Level Setting Time: <2.5 ms


• Frequency Hopping: 500 µs capability


• Spectral Purity (CW): −130 dBc/Hz at 1 Hz bandwidth, 20 kHz carrier offset


• Broadband Noise (Vector Modulation): −136 dBc to 3.3 GHz (−140 dBc typical)


• Digital Modulation Rate: Up to 7 Msymbol/s

Key Features

• Broadband I/Q modulator with outstanding vector accuracy and intermodulation suppression


• Simultaneous analog and digital modulation capability


• High-precision digital modulation without mode or standard restrictions


• Generation of TDMA and CDMA signals to major mobile radio standards


• Optional modules support GFSK, GMSK, π/4 DQPSK, and additional digital modes


• Internal data generator with 4 Mbit memory (optional SMIQB11)


• Memory extension capability for data generator applications (optional SMIQB12)

Typical Applications

• Mobile radio standards testing: GSM, WCDMA 3GPP, IS-95 CDMA, CDMA 2000, PHS, NADC, PDC


• Complex modulation signal development and validation


• TDMA and CDMA system characterization


• RF receiver and transceiver testing


• Fading simulation (with optional modules)

Compatibility & Integration Optional modules SMIQB10, SMIQB11, SMIQB12, SMIQB42, and SMIQB45 extend modulation capabilities and support implementation of specific mobile radio standards.