The Keysight M9384B VXG and M9383B VXG-m are microwave signal generators covering 1 MHz to 44 GHz. The two share the VXG signal-generation architecture but differ in physical form: the M9384B VXG is a self-contained instrument with an integrated display and front-panel controls, while the M9383B VXG-m is a modular PXIe implementation built from a set of plug-in modules. The VXG is described as a 44 GHz signal generator with 2 GHz RF bandwidth.

A signal generator produces precise, controllable RF and microwave signals used to stimulate a device under test so its response can be measured. For the VXG and VXG-m, performance is characterized for 5G NR signal creation across both FR1 and FR2 bands as well as LTE, with error vector magnitude (EVM) and adjacent channel power ratio (ACPR) specified at representative carrier frequencies and modulation formats such as 256QAM with 120 kHz and 60 kHz subcarrier spacing.

ValueTronics stocks and holds its own inventory in a 20,000 square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every pre-owned unit is inspected and functionally verified in-house before it ships, while new units are supplied factory-sealed exactly as received. This lets engineers source the right configuration with confidence in both availability and condition.

Brand Heritage

Keysight Technologies traces its test-and-measurement heritage to Hewlett-Packard. HP's measurement business was spun off as Agilent Technologies in 1999, and Agilent's electronic measurement division became Keysight Technologies in 2014.

Compare Other Models in This Series

The VXG family pairs two implementations of the same microwave signal-generation engine. The M9384B VXG is a standalone instrument, while the M9383B VXG-m is a modular PXIe version assembled from plug-in modules. Both cover 1 MHz to 44 GHz and share the frequency, power, modulation, and spectral-purity characteristics defined for the VXG architecture.

Frequency coverage within the family is set by range options — F14, F20, F32, and F44 — establishing maximum frequencies of 14, 20, 31.8, and 44 GHz respectively. Additional capability such as vector modulation (option Dxx), pulse modulation (option PMR/PME), and channel count is selected through the same option-based configuration.

Each model below is its own dedicated product page with condition-matched pricing. Review the comparison table to choose the form factor and option configuration that fits your application, then select the pre-owned unit that matches your requirement.

The M9384B VXG is the self-contained form factor in this family. It integrates a 10.6-inch 1280 × 768 display, front-panel connectors, a removable 240 GB solid-state drive, and USB 3.0/2.0 host ports in a single benchtop enclosure measuring approximately 578 × 445 × 190 mm.

The primary difference within the family is physical architecture rather than core RF performance. The M9384B VXG is an integrated benchtop instrument, whereas the M9383B VXG-m is composed of PXIe modules — including the M9312B, M9314B, M9323A, M9343A, and M9347A — sized for slot-based system integration.

Beyond form factor, configurations differ by the selected frequency range option, single- versus dual-channel build, and the modulation and pulse options installed. The comparison table that follows summarizes these per-configuration differences.

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

Product Core & Specifications

Important: Maximum reverse power: ½ Watt, 0 VDC (nominal).

Important: The M9384B VXG requires a 19.2 GHz CW frequency reference at its 19.2 GHz In port for instrument operation; this port is cabled from the factory to the 19.2 GHz Out 1 port. If an alternate 19.2 GHz In is provided, the 19.2 GHz Out 1 port should be terminated with a 50 Ω load.

Important: The M9384B requires an external 100 MHz reference clock at EXT CLK IN for instrument operation (+10 dBm nominal, 50 Ω, damage level +20 dBm).

Important: GPIB cabling requires accessory Y1260A (use accessory Y1260A for GPIB cabling); it is not part of the standard instrument.

Important: Specifications apply over a 20 °C to 30 °C temperature range (unless otherwise stated) and after a 45-minute warm-up period, for an instrument stored a minimum of 2 hours within the 0 to 40 °C operating temperature range.

Important: A one-year calibration cycle is recommended.

Important: Aging rate is not verified by Keysight N7800A TME Calibration and Adjustment Software; daily aging rate may be verified as a supplementary chargeable service on request.

About this Pre-Owned unit

This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects.

• Warranty included
• Functional verification included
• Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data.
• Note that unnecessary accessories may not be included (contact Test Architect to confirm).

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.