Rohde & Schwarz AMIQ I/Q Modulation Generator

The Rohde & Schwarz AMIQ is a dual-channel I/Q modulation generator that produces complex, digitally modulated signals with precision control over baseband and IF parameters. It generates baseband I/Q signals or intermediate frequency signals up to 25 MHz, and integrates with vector signal generators like the SMV03 for RF upconversion. The instrument delivers sample rates to 100 MSample/s per channel with 14-bit analog amplitude resolution (16-bit optional via digital output), making it ideal for development and validation of modern communication systems employing wideband digital modulation techniques including WCDMA, HIPERLAN2, and IEEE 802.11a.

Its architecture supports direct characterization of I/Q modulators and demodulators at baseband, eliminating the need for RF conversion in early-stage testing.

Technical Specifications

• Dual-channel I/Q modulation generator


• Output: Baseband I/Q or IF signals up to 25 MHz


• Sample rate: Up to 100 MSample/s per channel


• Memory depth: 4,000,000 samples (AMIQ 03) or 16,000,000 samples (AMIQ 04) per channel


• Amplitude resolution: 14 bits (analog); 16 bits with R&S®AMIQ-B3 digital output option


• Clock frequency precision: 10⁻⁷ (external clock)


• Digital output word length: 8–16 bits selectable via 68-pin SCSI connector (Option R&S®AMIQ-B3)


• Antialiasing filter options: None, 25 MHz, 2.5 MHz, or external loopback


• Baseband ACP dynamic range: -78 dBc typ.


• WCDMA 3GPP FDD ACP: -78 dBc typ. (64 channels)

Key Features

• Automatic amplitude and offset alignment for channel symmetry


• I/Q skew adjustment capability


• Wide dynamic range for multicarrier signal generation


• Waveform storage on built-in hard disk with floppy drive loading


• Multi-segment waveform sequencing: up to 30 sequences for fast ATE switchover


• Programmable signal impairments and interfering signals (with R&S®WinIQSIM™)

Typical Applications

• Baseband characterization of I/Q modulators and demodulators


• Development and validation of WCDMA, HIPERLAN2, and IEEE 802.11a systems


• Wideband digital modulation testing


• Signal impairment analysis and simulation

Compatibility & Integration

• Remote control via GPIB/IEEE and RS-232-C


• 10 MHz reference input/output


• Sample clock input, trigger input


• Four user-programmable marker outputs


• External filter loopback I/O


• RF upconversion via integration with R&S® SMV03 or equivalent vector signal generator