The Agilent N5225A is a 50 GHz PNA microwave network analyzer, part of the N5224A/N5225A PNA family covering 10 MHz to 43.5 GHz and 10 MHz to 50 GHz respectively. The instrument is offered in 2-port and 4-port configurations across multiple option levels: base models (Option 200 / 400), front-panel-jumper and R1 receiver-switch versions (Option 201 / 401), extended-power-range versions with source and receiver attenuators (Option 217 / 417), and full-featured versions adding internal bias-tees (Option 219 / 419). All variants share the same source, receiver, and IF architecture and the same 2.4 mm test port connector type.

The PNA is used for vector S-parameter characterization of RF and microwave components and networks. The datasheet documents performance for full 2-port calibrated measurements using either the 85056A mechanical calibration kit or the N4693A 2-port electronic calibration module, with corrected directivity, source match, load match, reflection tracking, and transmission tracking specified across the full frequency range. The receiver architecture includes selectable normal and narrowband IF paths, IF gating for pulsed-RF point-in-pulse and pulse-profile measurements, and an external IF input that allows remote mixers to bypass the internal first converters.

ValueTronics International has supplied PNA-family network analyzers from our 20,000 sq ft secure warehouse at 1675 Cambridge Drive, Elgin, Illinois since 1992. Every PNA we list is inventoried in our facility, photographed by our technicians, and performance-verified against the manufacturer's published specifications before shipment — not described from a vendor sheet or drop-shipped from a third party. That distinction matters on a $40,000-class instrument where condition documentation and connector integrity directly affect calibration validity.

Brand Heritage

The PNA network analyzer line originated within Hewlett-Packard's test and measurement division, which was spun off as Agilent Technologies in 1999. In 2014, Agilent's electronic measurement business was split off again as Keysight Technologies, which now manufactures and supports current-generation PNA instruments. N5224A and N5225A units bearing Agilent branding are functionally the same product family as their Keysight-branded successors and continue to receive calibration and service support through the Keysight network.

Compare Other Models in This Series

The N5224A and N5225A are two members of the PNA microwave network analyzer family, sharing identical source, receiver, and IF architecture and differing primarily in their upper frequency limit: 43.5 GHz for the N5224A and 50 GHz for the N5225A. Both models are offered as 2-port (Option 200-series) and 4-port (Option 400-series) variants, and within each port count the option levels add front-panel receiver-access jumpers and an R1 receiver switch, then source/receiver step attenuators for extended power range, and finally internal bias-tees at the top of the option ladder.

Within either chassis, the option-level choice is the more consequential decision than the frequency choice for many applications. The base model (Option 200 / 400) provides the standard test set without front-panel access loops, while Option 201 / 401 adds the jumpers and R1 switch that allow direct receiver access and reference-channel re-routing for mixer measurements and external-test-set integration. Option 217 / 417 adds source and receiver attenuators that extend the usable input and source power range — important when characterizing high-gain amplifiers or working at low signal levels. Option 219 / 419 adds internal bias-tees on each test port, rated ±200 mA / ±40 VDC, eliminating external bias networks during active-device characterization.

Each pre-owned N5224A / N5225A configuration listed below is its own product page with its own condition documentation, accessory list, and pricing. The model and option string determine measurement capability; the page you are on reflects what is physically in inventory for that exact configuration.

The N5225A extends the PNA's frequency coverage to 50 GHz, picking up the 43.5–47 GHz and 47–50 GHz bands that the N5224A cannot reach. Above 43.5 GHz, the source maximum leveled power rolls off — the datasheet specifies +6 dBm from 43.5–47 GHz and –2 dBm from 47–50 GHz on the base models — and dynamic range narrows accordingly, but the receiver noise floor remains within a few dB of the lower-frequency values.

The frequency-limit difference between the N5224A (43.5 GHz) and N5225A (50 GHz) drives the choice between the two models. Below 43.5 GHz, the two are specified identically across directivity, source/load match, tracking, dynamic range, noise floor, and source power — so the decision rests on whether the application needs coverage into V-band's lower edge. Within each chassis, the option-level ladder (00/01/17/19 or 00/01/17/19 at 4-port) adds capability in fixed increments documented in the corrected and uncorrected performance tables.

The comparison table that follows lists each available configuration with its key headline specifications. Use the published frequency range, port count, and option-level feature additions (jumpers, attenuators, bias-tees) to identify the configuration that matches the measurement requirement, then confirm the per-option dynamic range and source power figures against the application.

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

Product Core & Specifications

About this used unit

• 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).

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.