The Rohde & Schwarz FSQ3 is a high-performance signal and spectrum analyzer engineered for development, production, and service environments across wireless communication standards. It combines wideband spectrum analysis with flexible demodulation bandwidth—28 MHz standard, expandable to 120 MHz—and delivers measurement speeds up to 70 remote measurements per second via GPIB. The instrument features exceptional noise floor performance, selectable resolution bandwidths from 1 Hz to 50 MHz, and I/Q memory up to 16 Msample (expandable to 705 Msample). Its RMS detector provides 100 dB dynamic range with level uncertainty of 0.3 dB across the full frequency range.
Technical Specifications
• Frequency Range: 20 Hz to 3.6 GHz
• Demodulation Bandwidth: 28 MHz standard; optional up to 120 MHz
• Resolution Bandwidth: 1 Hz to 50 MHz; digital filters 10 Hz to 100 kHz; FFT filters 1 Hz to 30 kHz; channel filters 100 Hz to 5 MHz
• Amplitude Range: DANL to +30 dBm
• DANL: −158 dBm (1 Hz bandwidth); −173 dBm with noise correction and R&S®FSU-B24 preamplifier
• Third-Order Intercept Point: +25 dBm (typical)
• 1 dB Compression Point: +13 dBm (typical)
• ACPR/3GPP: 84 dB with noise correction
• Level Uncertainty: 0.3 dB total to 3.6 GHz; <0.1 dB linearity error down to −70 dB
• Phase Noise: −123 dBc/Hz @ 10 kHz offset, −160 dBc/Hz @ 10 MHz offset (640 MHz carrier, typical)
• Sweep Time: 2.5 ms (frequency domain); 1 µs (time domain)
• I/Q Memory: 16 Msample, expandable to 705 Msample
• Measurement Points: 155 to 30,001 selectable
• Detector: RMS with 100 dB dynamic range
• Spurious Measurements: Up to 100,001 points across 20 segments
• Calibration Interval: Two years (reference frequency excepted)
• External Reference: 1 MHz to 20 MHz in 1 Hz steps
– Key Features
• Harmonic distortion measurement capability
• Transducer factor correction for antenna and cable frequency response
• Optional firmware enables vector signal analysis and demodulation measurements
– Typical Applications
Bluetooth, GSM/EDGE, 3GPP WCDMA/HSDPA/TD-SCDMA, CDMA2000, LTE, 802.11a/b/g/j, IEEE 802.16 WiMAX standards.
– Compatibility & Integration
Supports GPIB remote control and manual operation modes. Measurement speed reaches 70 remote or 80 manual measurements per second.
