The Agilent/Keysight 8643A is a high-performance signal generator delivering precise RF signal generation from 252 kHz to 1030 MHz (2060 MHz with Option 002). Built for R&D, manufacturing, and service environments, it combines exceptional spectral purity with frequency stability through an oven-controlled timebase and electronic attenuator using solid-state PIN diodes.
Technical Specifications
Frequency Range
• Standard: 252 kHz to 1030 MHz
• Option 002 (Doubled Output): 252 kHz to 2060 MHz
• Resolution: 0.01 Hz
Output Level
• Range: +13 dBm to −137 dBm
• Overrange: Up to +15 dBm (increased harmonic distortion)
• Accuracy: ±1.0 dB down to −127 dBm
Spectral Performance
• SSB Phase Noise @ 1 GHz: −130 dBc/Hz
• Nonharmonic Spurious: −100 dBc up to 1 GHz
Modulation
• Standard: Amplitude Modulation (AM), Frequency Modulation (FM), Pulse Modulation
• Internal Synthesizer: 0.1 Hz to 400 kHz (sine and white Gaussian noise); 0.1 Hz to 50 kHz (triangle, sawtooth, square)
• Waveforms: Sine, square, triangle, sawtooth, white Gaussian noise, two-tone capability
• Pulse Modulation (Option 008): Rise/fall times 80 dB on/off ratio, variable delay and width 50 ns to 999 ms
• VOR/ILS Simulation (Option 009): Avionics testing capability
Sweep Capabilities
• Digital stepped sweep across entire frequency range
• Linear/logarithmic selection
• Sweep times: 0.5 to 1000 sec
• Phase-continuous sweep: 40 MHz span available at maximum carrier frequency
– Key Features
• Electronic attenuator with PIN diode solid-state components for reliability and precision level setting
• High-stability oven-controlled timebase (standard configuration)
• 0.01 Hz frequency resolution for exacting calibration and measurement applications
• Two independent modulation sources available simultaneously
• Internal frequency counter (Option 011): 20 Hz to 2 GHz range
– Typical Applications
• Component characterization and manufacturing test
• Receiver and transceiver development
• Avionics system simulation and validation
• Filter and amplifier evaluation
• Phase noise and spectral purity analysis
– Compatibility & Integration
• GPIB (IEEE 488.2-1987) remote control interface
• Member of Agilent/Keysight signal generator family
• Available options: High Stability Timebase (001), Doubled Output (002), Rear Panel Connections (003), Low Noise (004), and others
