The Keysight Infiniium 90000 Q-Series is a family of real-time oscilloscopes built by applying Keysight's microwave expertise to real-time oscilloscope design. With real-time bandwidths reaching 63 GHz, the Q-Series is described as the world's fastest real-time oscilloscope, letting engineers see their fastest signals as they really are at the extremes of electrical and optical measurements.

An oscilloscope captures voltage waveforms over time so an engineer can see a signal's amplitude, timing, and shape. The Q-Series is aimed at the fastest of these signals: its four channels at 33 GHz make it suited to 28 and 32 Gbit/s SERDES designs, and the series is used for work on technologies such as PCI Express, DisplayPort, Thunderbolt, and high-speed memory. In combination with the N4391A optical modulation analyzer it serves as a turn-key solution for advanced research on 100-G, 400-G, and terabit transmission.

ValueTronics supports the Q-Series from our own 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois, where we stock and hold our own inventory. Every pre-owned unit is inspected and functionally verified in-house before it ships, while new units ship factory-sealed exactly as received from the manufacturer.

Brand Heritage

This oscilloscope family is made by Keysight Technologies. Keysight traces its roots to Hewlett-Packard, whose test and measurement business was spun out as Agilent Technologies in 1999 and then established as Keysight Technologies in 2014.

Compare Other Models in This Series

The Infiniium 90000 Q-Series spans real-time bandwidths from 20 GHz to 63 GHz, with each model offering four channels. Across the series the scopes share the same core architecture: the industry's lowest noise floor, full PrecisionProbe compatibility, 2 Gpts maximum memory depth, and the same 15.4-inch touch-screen Infiniium interface.

Each bandwidth is available in two configurations, a DSA (digital signal analyzer) version and a DSO (digital signal oscilloscope) version. The DSA models come standard with 50 Mpts memory and the EZJIT, EZJIT Plus, EZJIT Complete, and serial data analysis software, while the DSO models provide the same hardware platform with that analysis software available separately.

Each model linked below is its own dedicated product page with condition-matched pricing for the pre-owned unit. Choose the bandwidth tier and the DSA or DSO variant that fits your application to view that pre-owned configuration and its current price.

The primary difference across the family is analog bandwidth: 20 GHz (92004Q), 25 GHz (92504Q), 33 GHz (93304Q), 50 GHz (95004Q), and 63 GHz (96204Q). Two-channel sample rate is 160 GSa/s on the 50 and 63 GHz models and 80 GSa/s on the 20, 25, and 33 GHz models, while all five models provide 80 GSa/s across four channels. Rise time also tracks bandwidth, from 22.0 ps (10–90%) on the 20 GHz model down to 7.0 ps on the 63 GHz model.

All models are bandwidth-upgradable, with paths that extend up to 63 GHz, and memory is expandable from the 20 Mpts standard up to 2 Gpts per channel. Note that segmented memory is not supported on the 50 and 63 GHz models. The comparison table that follows lays out the bandwidth, sample rate, memory, and rise-time figures for each model side by side.

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

Accessories Supplied

• Front cover
• Power cord
• Keyboard
• Mouse
• Stylus
• 3.5 mm male-to-male calibration cable (54916-61626)
• 3.5 mm male to 2.4 mm male calibration cable (54932-61630)
• ESD strap
• (5) coax adapters (5061-5311)
• Removable SSD hard drive

Product Core & Specifications

Important: Maximum input voltage: ±5 V for steady state and transient measurements.

Important: Segmented memory is currently not supported on the 50 GHz and 63 GHz models of the 90000 Q-Series.

Important: Well regulated power is required for 100 to 120 VAC operation.

Important: DSA models come standard with 50 Mpts memory, EZJIT, EZJIT Plus, EZJIT Complete and serial data analysis software.

Important: Specifications denoted as warranted are valid after a 30-minute warm up period and within ± 5 °C from the annual calibration temperature; all other specifications are typical.

Important: InfiniiMax III probe heads are recommended for the InfiniiMax III N2800A/01A/02A/03A probe amplifiers.

Recommended pairing: match the oscilloscope with the InfiniiMax III probe amplifiers (N2800A, N2801A, N2802A, N2803A; 16 to 30 GHz) for the highest-bandwidth, lowest-loading probing.

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 with every pre-owned unit.
• 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.