The Agilent/Keysight 8654A is a compact RF signal generator delivering stable, accurate signals from 10 Hz to 520 MHz. Engineered for receiver testing, system calibration, and general-purpose signal generation, it combines broad frequency coverage with excellent output control and signal purity in a single instrument.
Technical Specifications
Frequency Range: 10 Hz to 520 MHz across six contiguous bands: 10–18.6 MHz, 18.6–35 MHz, 35–66 MHz, 66–130 MHz, 130–250 MHz, and 250–520 MHz.
Output Level: +10 dBm to −130 dBm into 50 Ω load. Option 003 reduces maximum output to +8 dBm. Output resolution is 0.1 dB, with absolute accuracy of ±1 dB above −127 dBm and typically ±3 dB below that threshold.
Output Impedance: 50 Ω, AC coupled.
Signal Purity: Harmonic distortion below +3 dBm is <−20 dBc (or <−15 dBc with Option 003). Subharmonic and non-harmonic spurious signals measure <−100 dBc. Residual AM averages <−55 dBc in a 50 Hz to 15 kHz post-detection bandwidth. Residual FM on CW is <0.3 ppm (0.3–3 kHz bandwidth) or <0.5 ppm (50 Hz–15 kHz bandwidth).
SWR: <1.7:1 below −2 dBm output; <1.3 on 0.1 V range or lower (0.1% deviation
• 8654B variant provides calibrated, metered FM across four deviation ranges: 0–3 kHz, 0–10 kHz, 0–30 kHz, and 0–100 kHz
• External modulation bandwidth >25 kHz when driven from 600 Ω or lower impedance source
– Typical Applications
• Receiver sensitivity and linearity measurements
• RF and intermediate-frequency system calibration
• General laboratory signal generation
• Modulation index testing and AM/FM performance validation
– Compatibility & Integration
Standard 50 Ω output connector. AC-coupled design. Accepts both internal and external modulation signals via dedicated 600 Ω input.
