The Agilent/Keysight 8561E is a portable RF spectrum analyzer delivering signal analysis from 30 Hz to 6.5 GHz with external mixer capability extending to 325 GHz. Built to MIL-T-28800 ruggedness standards, this 20 kg instrument combines field-portable design with laboratory-grade performance for telecommunications, aerospace, and research environments.
Technical Specifications
Frequency Coverage
• Internal mixer: 30 Hz to 6.5 GHz
• External mixer support: Up to 325 GHz
• Frequency reference accuracy: ±0.1 ppm typical
• Frequency counter resolution: 1 Hz
Resolution Bandwidth
• Digital RBW: 1 Hz, 3 Hz, 10 Hz, 30 Hz, 100 Hz
• Configurable range: 1 Hz to 1 MHz
• Shape factor: 5:1 (narrow)
Amplitude Performance
• Dynamic range: -145 dBm/Hz to +30 dBm
• Maximum RF input level (≥10 dB attenuation): +30 dBm (1 W)
• Peak pulse power (≤10 µs, ≥30 dB attenuation, <1% duty cycle): +50 dBm (100 W)
• Third-order intercept: Up to +15 dBm
• On-screen calibrated display: 100 dB
• AC-coupled maximum DC input: ±50 Vdc
• DC-coupled maximum DC input: ±0.2 Vdc
Sweep Specifications
• Zero-span sweep time: 50 µs to 6000 s
• Narrow-span sweep time: 50 ms to 100 ks
• Timing accuracy at zero span: ±1% (≥30 ms sweep), ±0.1% (<30 ms)
Phase Noise & Stability
• Noise sidebands: Typically <-115 dBc/Hz at 10 kHz offset from 1 GHz
• Residual FM: -80 dBc/Hz
• Frequency aging: ±1 × 10⁻⁷ per year
– Key Features
• Time-gated signal analysis for pulsed RF, TDMA, burst-modulated signals
• Adjacent channel power (ACP) and occupied bandwidth measurements
• AM-FM demodulation capability
• Digital radio and phase noise measurement personalities
• GPIB interface for ATE integration
– Environmental
• Operating temperature: -10 °C to +55 °C
• Weight: Approximately 20 kg
• Dimensions: 163 mm (H) × 325 mm (W) × 427 mm (D)
• AC input: 90–140 V, 115 VAC nominal
– Typical Applications
Telecommunications signal characterization, aerospace EMC testing, pulsed signal measurement, phase noise analysis, and multicarrier power assessment.
