Advantest R3271A 100Hz to 26.5GHz Spectrum Analyzer

The Advantest R3271A is a spectrum analyzer spanning 100 Hz to 26.5 GHz, engineered for precision signal analysis in telecommunications, aerospace, and R&D environments. It delivers 1 Hz frequency resolution, amplitude measurement from -150 dBm to +30 dBm with 0.01 dB resolution, and displayed average noise level of -145 dBm typical. The instrument provides flexible resolution bandwidth from 1 Hz to 10 MHz, sweep times from 1 ms to 100 s, and phase noise performance of -90 dBc/Hz at 10 kHz offset.

With frequency response flatness as tight as ±1.0 dB in mid-band and calibrator accuracy of -10 dBm ±0.3 dB, the R3271A supports component testing, EMC measurements, and signal integrity assessments across demanding frequency ranges.

Technical Specifications

• Frequency Range: 100 Hz to 26.5 GHz


• Frequency Resolution: 1 Hz


• Frequency Reference Oscillator Stability: 2 × 10⁻⁸ (standard) or 5 × 10⁻⁹/day (optional)


• Amplitude Measurement Range: -150 dBm to +30 dBm


• Amplitude Resolution: 0.01 dB


• Displayed Average Noise Level (DANL): -145 dBm typical (10 Hz RBW, 0 dB input attenuation, 20 times averaged)


• Phase Noise: -90 dBc/Hz at 10 kHz offset; -110 dBc/Hz in bands below 2.5 GHz and above 23 GHz


• Residual FM: <2 Hz peak-to-peak at 10 MHz carrier, 20 kHz offset


• Resolution Bandwidth: 1 Hz to 10 MHz (1-3-10 sequence); 100 Hz to 3 MHz ±0.3 dB flatness; 10 Hz digital IF mode ≤±1.5 dB


• Video Bandwidth: 1 Hz to 10 MHz (1-3-10 sequence)


• Sweep Time: 1 ms to 100 s (auto/manual); 50 µs to 1000 s for zero span


• Reference Level Range: -80 dBm to +30 dBm


• Frequency Response (in-band flatness, 10 dB input attenuation): ±1.0 dB to ±4.0 dB depending on band


• Calibrator Accuracy: -10 dBm ±0.3 dB


• IF Gain Uncertainty: ±0.5 dB (0 dBm to -50 dBm), ±0.7 dB (0 dBm to -80 dBm)

Key Features

• 1 Hz frequency resolution across full 26.5 GHz span


• Low DANL supports weak signal detection and noise floor analysis


• Digital IF filtering enables sharp RBW settings down to 1 Hz


• Automatic calibration with traceable reference


• Band-switched design with ±0.5 dB additional uncertainty


• Flexible sweep modes from milliseconds to 1000 seconds

Typical Applications

• RF component and subsystem characterization


• Electromagnetic compatibility testing


• Signal integrity and spectral purity measurements


• Multiband signal analysis in complex RF environments