Agilent / Keysight 85660B RF SECTION

The Agilent/Keysight 85660B RF Section is a modular RF front-end component that pairs with the 85662A IF-Display Section to form the 8566B Spectrum Analyzer system. It delivers wideband RF signal analysis from 100 Hz to 22 GHz, with extension to 75 GHz or 325 GHz using external mixers. The unit supports signal purity, noise figure, and harmonic distortion analysis across a 90 dB calibrated amplitude range.

– Technical Specifications

Frequency & Signal Handling
• Frequency range: 100 Hz to 22 GHz (75 GHz with preselected external mixers; 325 GHz with external mixers)
• Amplitude measurement range: +30 dBm to -135 dBm
• Maximum continuous RF power: +30 dBm (1 W) with input attenuation >10 dB
• Peak pulse power: +50 dBm (100 W) with input attenuation ≥30 dB, pulse width <10 µs, duty cycle <1%
• DC input tolerance: 0 V without attenuation; ±7 V DC maximum with 10 dB or greater input attenuation
• Gain compression: <1.0 dB with input <-5 dBm at mixer

Resolution & Sensitivity
• Resolution bandwidth: 10 Hz to 3 MHz (1, 3, 10 sequence), manually selectable or auto-coupled to span
• RBW accuracy: ±20% (3 MHz; 10 Hz–1 kHz), ±10% (3 kHz–1 MHz), ±20% (30 kHz and 100 kHz with ≤90% RH, 40 °C)
• Displayed average noise level: -135 dBm (0 dB input attenuation, 10 Hz RBW)

Frequency Reference
• Aging: <1 × 10⁻⁹/day; <2.5 × 10⁻⁷/year
• Temperature stability: <7 × 10⁻⁹ across 0–55 °C
• Warm-up stabilization: Within 1 × 10⁻⁸ of final frequency within 30 minutes from cold start at 25 °C

– Key Features

• 16 Kbytes user RAM for trace data, instrument states, and downloadable programs
• HP-IB interface with full command set (SH1, AH1, T6, TEO, L4, LEO, SRI, RL1, PPI, PCI, DT1, C1, C28)
• Designed for modular integration with compatible display units

– Typical Applications

• Communications signal analysis
• Defense and military RF testing
• Harmonic and intermodulation distortion measurement
• Noise figure characterization

– Compatibility & Integration

Works exclusively with the Agilent/Keysight 85662A IF-Display Section to form the complete 8566B Spectrum Analyzer system. Control via HP-IB interface.