HP / Agilent 83751B High Power Synthesized Sweeper, 2 – 20 GHz

The HP/Agilent 83751B is a high-power synthesized sweeper delivering precise signal generation across 2 GHz to 20 GHz. Built for RF and microwave component testing, it combines synthesized accuracy with high-speed swept performance in a benchtop instrument. The 83751B supports continuous analog and digital stepped sweeps, multiple modulation modes, and flexible output configurations, making it suitable for R&D and production test environments requiring repeatable, phase-coherent measurements.

Technical Specifications

• Frequency range: 2 GHz to 20 GHz


• Output impedance: 50 ohms


• Output connector: APC-3.5mm male (standard); Type-N optional (Option 1ED); rear panel output available (Option 1E4) Output Power


• Maximum leveled power: +16 dBm (below 2 GHz), +17 dBm (2 GHz and above)


• Harmonics: −20 dBc


• With Option 1E1 step attenuator: Maximum leveled power reduced by 1 dB


• Power sweep range: 25 dB Modulation


• Pulse: 60 dB on/off ratio; 15 ns rise/fall (0.5–2 GHz), 100 ns rise/50 ns fall (2–20 GHz); internal generator 1–65 µs width and period; 2 µs minimum leveled width


• AM: 1 dB/V sensitivity, >100 kHz bandwidth (3 dB), 22 dB depth, 3.5 kohms input impedance


• FM: DC to 10 MHz rates; ±75 MHz deviation (DC–100 Hz), ±7 MHz (100 Hz–1 MHz), ±5 MHz (1–2 MHz), ±1 MHz (2–10 MHz); −6 or −20 MHz/V sensitivity; 1 kohm input impedance Sweep Modes


• Continuous wave, stepped, ramp, power, marker, and alternate sweep


• Broadband and narrowband operation Reference


• 10 MHz reference output: 0 dBm nominal, 50 ohms (BNC female, rear panel)

Key Features

• Synthesized frequency generation for superior stability and accuracy


• Internal pulse generator with 1 µs resolution


• AM depth of 22 dB; FM deviation up to ±75 MHz at low modulation rates


• Flexible sweep architecture with marker and alternate modes


• Optional step attenuator and alternative connectors

Typical Applications

• Component characterization and scalar network analysis


• Swept frequency testing of RF filters, amplifiers, and antennas


• Modulation performance validation


• Benchtop R&D and manufacturing test

Compatibility & Integration Standard 50 ohm interface; 10 MHz reference clock synchronization available via rear panel. Step attenuator option and connector variants support diverse test configurations.