Rohde and Schwarz FSIQ40 Signal Analyzer, 40 GHz

The Rohde & Schwarz FSIQ40 is a signal analyzer that delivers comprehensive measurement capabilities across frequency, time, and modulation domains from 20 Hz to 40 GHz. Built for high-speed operation in demanding development and production environments, it combines integrated measurement functions with vector signal analysis to streamline complex test routines.

Technical Specifications

• Frequency range: 20 Hz to 40 GHz


• Displayed Average Noise Level (DANL): -158 dBm (1 Hz BW) at 1 GHz; -155 dBm at 7 GHz; -151 dBm at 26 GHz; -147 dBm at 40 GHz


• Third-Order Intercept (TOI): +25 dBm typical


• 1 dB Compression Point: +13 dBm typical


• Phase Noise: -160 dBc (1 Hz) at 10 MHz offset, 640 MHz carrier frequency; -123 dBc/Hz @ 10 kHz offset, 640 MHz carrier frequency


• Level Uncertainty: 0.3 dB total up to 3.6 GHz; <0.1 dB linearity error down to -70 dB Signal Analysis


• Demodulation Bandwidth: 28 MHz standard; optional up to 120 MHz


• I/Q Memory: 16 Msample


• Resolution Bandwidth (RBW): 1 Hz to 50 MHz


• Digital Filters: 10 Hz to 100 kHz; Fast FFT Filters: 1 Hz to 30 kHz; Channel Filters: 100 Hz to 5 MHz


• Adjacent Channel Leakage Ratio (ACLR): 84 dB (3GPP with noise correction); 77 dB (3GPP multicarrier, 4 adjacent carriers); 75 dB (WCDMA 4.096 MHz bandwidth) Measurement Speed


• Frequency domain sweep time: 2.5 ms


• Time domain sweep time: 1 µs


• Measurements per second: Up to 70 (GPIB); Up to 80 (manual/screen update)

Key Features

• I/Q data extraction for MCPA adjustment and custom applications


• Digital demodulation measurement firmware support


• RRC and EMI bandwidth filters (200 Hz, 9 kHz, 120 kHz)


• GPIB (IEEE 488.2), RS-232-C, VGA, and 100BaseT LAN interfaces


• Dimensions: 435 mm × 236 mm × 460 mm; 24 kg

Typical Applications

• Mobile radio development and production testing


• Bluetooth, GSM/EDGE, WCDMA, HSDPA, TD-SCDMA, CDMA2000, 1xEV-DV, 1xEV-DO, and WLAN 802.11a/b/g/j signal demodulation and analysis

Compatibility & Integration IEEE 488.2 GPIB, RS-232-C serial, standard VGA output, and 100BaseT Ethernet enable integration into automated test systems and remote operation.