The Agilent/Keysight 8561B is a portable RF spectrum analyzer built for signal monitoring, component testing, and EMI diagnostics across a broad frequency range. Operating from 30 Hz to 6.5 GHz with a synthesized local oscillator, it delivers the sensitivity and dynamic range required for demanding RF measurements in field and laboratory environments.
Technical Specifications
Frequency Performance
• Frequency range: 30 Hz to 6.5 GHz
• Frequency resolution: 1 Hz minimum
• Frequency span: 10 Hz to 6.5 GHz, continuously variable
• Frequency accuracy: ±(Frequency Span × %Span/100 + RBW × %RBW/100 + 2% of center frequency + 1 Hz)
Amplitude Characteristics
• Amplitude range: −135 dBm to +30 dBm typical
• Displayed average noise level (DANL): −147 dBm typical at 1 GHz, 10 Hz RBW
• Amplitude accuracy: ±1.0 dB typical (20 MHz to 6.5 GHz, 0 dB attenuation, +10 dBm reference)
• Reference level: −70 dBm to +30 dBm
• Display scaling: 0.01 dB to 10 dB/div logarithmic; 1 µV to 5 V/div linear
Resolution and Bandwidth
• Resolution bandwidth (RBW): 10 Hz to 5 MHz in 1-3-10 sequence
• RBW accuracy: ±5%
• Video bandwidth (VBW): 0.1 Hz to 5 MHz in 1-3-10 sequence
• Selectivity: Typically 6 dB bandwidth to 1.5 times indicated RBW
Sweep and Trigger
• Sweep time: 20 ms to 100 s (auto or manual)
• Sweep triggers: Free run, single, line, video, external
– Key Features
• AM and FM demodulation capability for signal analysis
• 1 Hz frequency resolution for precise center frequency measurement
• Multiple amplitude units: dBm, dBmV, dBuV, V, W, dBW
• External trigger and reference inputs for system integration
• Dual AC power inputs: 100–120 V or 200–240 V at 50/60 Hz
– Typical Applications
• Signal monitoring and characterization
• Component and subsystem RF testing
• EMI/RFI diagnostics and compliance measurement
• General-purpose spectrum analysis in laboratory and field settings
– Compatibility & Integration
• RF input: Type N female, 50 Ω
• External trigger and reference inputs: BNC connectors
• RS-232 interface for remote control and data transfer
• Optional tracking generator, EMI measurement options, and probe power available
• Operating temperature: 0°C to 50°C
