HP / Agilent 83731A

Synthesized Signal Generator · 8–20 GHz · Opts 1E1 / 1E2 / 1E5 / 237

Calibrated February 5, 2026 · Certificate Included

Calibration

This unit was calibrated on February 5, 2026 and ships with its calibration certificate, issued by Bionetics (PME cert, TPG). Bionetics is an established metrology and calibration provider serving commercial and government customers, operating fixed calibration laboratories and interfacing with NIST on the maintenance of primary standards.

Buyers should review the certificate and confirm that its scope, traceability, and calibration interval meet the requirements of their own quality program.

Condition

Used. The exterior shows light scuffing consistent with normal bench and rack use — nothing major, no dents, cracks, or impact damage. See photos, which show the actual unit being sold.

Overview

The HP 83731A is a microwave synthesized signal generator known for excellent spectral purity and high output power — typically greater than +14 dBm — with spectral purity maintained even at high power levels. It is widely used for microwave receiver testing, local oscillator substitution, and component characterization. It is the recommended local oscillator for the HP 8970B noise figure meter, where its low broadband noise reduces error when measuring low-gain devices, and it can drive 83550-series millimeter wave modules to generate signals up to 110 GHz.

Specifications

Manufacturer	Hewlett Packard / Agilent / Keysight
Model	83731A
Series	HP 83700 series synthesized signal generators
Frequency range	8 GHz to 20 GHz (as configured with Option 237)
Output power	Typically greater than +14 dBm
Installed options	1E1 (step attenuator), 1E2, 1E5, 237
Serial number	3339A00110
Interface	GPIB (HP-IB)
Form factor	Benchtop, rack mountable
Cosmetic condition	Light scuffing, no major wear or damage
Calibration	Bionetics PME certificate, February 5, 2026 — included

Testing Performed

Powered on, passes self-test. Everything appears to be in perfect order, i have no cables to test everything./

What's Included

HP 83731A synthesized signal generator
Bionetics calibration certificate dated February 5, 2026
No original box, manuals, cables, or accessories — unit and certificate only
Everything pictured is included; nothing pictured is excluded

Please Note

This unit is configured with Option 237 and covers 8 to 20 GHz. Standard 83731A units without this option cover 1 to 20 GHz. Please confirm the 8 GHz low-end limit suits your application before purchasing.

This model is obsolete and no longer sold or supported by Keysight. Support, parts, and future calibration availability should be confirmed independently.

Shipping & Returns

Ships promptly. The original packaging is not available, so the instrument is double-boxed with heavy foam padding on all sides and shipped insured to protect it in transit.

Returns are not accepted. Please review the photos and description carefully, and ask any questions before purchasing.

Brand	HP
Signal Generator Type	Pulse Generator
Country of Origin	United States

HP / Agilent 83731A Synthesized Signal Generator

Shipping

Specifications

Returns Accepted