The Agilent/Keysight 8673C is a synthesized signal generator delivering precise, leveled output across 50 MHz to 18.6 GHz. Built for demanding RF/microwave test applications in communications and electronic warfare, it combines fast frequency switching with low phase noise and flexible modulation capabilities.
Technical Specifications
Frequency Performance
• Operating range: 50 MHz to 18.6 GHz
• Overrange capability: 0.01 GHz to 18.6 GHz
• Frequency resolution: 1 kHz minimum
• Frequency switching time: 50 ms
• Time base stability: 5 × 10⁻⁹ per day
• External reference: 10 MHz
Output Characteristics
• Output level: +11 dBm to −100 dBm (50 MHz to 2.0 GHz); +5 dBm to −100 dBm (2 to 16 GHz); +2 dBm to −100 dBm (16 to 18.6 GHz)
• Level resolution: 0.1 dB
• Level accuracy: 2.7 dB
• Level switching time: 25 ms
• Output impedance: 50 Ohms
Spectral Purity
• Single-sideband phase noise: −110 dBc/Hz at 100 kHz offset (2 to 6.2 GHz)
• Harmonics: −60 dBc
• Non-harmonic noise: −60 dBc
Modulation
• AM: Internally leveled; calibrated depth to 75% at rates up to 10 kHz; external control via 1 V peak input
• FM: Six deviation ranges to 10 MHz peak; rates down to 50 Hz
• Pulse: 2 to 18 GHz; ON/OFF ratio >70 dB; rise/fall times <50 ns; PRF 50 Hz to 1 MHz; minimum duty cycle <0.0001
• Simultaneous AM, FM, and pulse modulation supported
Sweep Functions
• Modes: Auto, Manual, Single
• Type: Start/stop or span sweep
• Up to 9999 frequency points per sweep
• Dwell time: 1 to 255 (settable)
– Key Features
• Frequency resolution down to 1 kHz enables fine-grain signal tuning
• Leveled output maintains amplitude stability across frequency transitions
• Multiple modulation types support complex signal simulation and testing
• Wide dynamic range (−100 to +11 dBm) accommodates varied load conditions
• Fast switching times minimize test cycle duration
– Typical Applications
• Communication system characterization and validation
• Electronic warfare signal simulation
• Component and subsystem RF testing
• Transceiver performance evaluation
– Compatibility & Integration
The 50-ohm output impedance ensures direct interfacing with standard RF test equipment. External 10 MHz frequency reference input enables phase coherence with system clocks. Modulation inputs accept standard −1 V to +1 V control signals.
