# Keysight N5225B 900 Hz to 50 GHz 2-Port and 4-Port PNA Network Analyzer (Pre-Owned) # Keysight N5225B 900 Hz to 50 GHz 2-Port and 4-Port PNA Network Analyzer (Pre-Owned) ## Key Features At A Glance - 2-port and 4-port S-parameter network analysis with 2.4 mm (male), 50-ohm test ports - Standard coverage from 10 MHz to 43.5 GHz (N5224B) or 50 GHz (N5225B); optional LFE extends to 900 Hz - GPIB (IEEE-488), Gigabit LAN, and USB interfaces standard for ATE integration and remote control - 31 cm (12.1 in) color active-matrix LCD at 1280 x 800 resolution - 1 Hz frequency resolution with ±0.7 ppm frequency accuracy - Optional source/receiver attenuators (extended power range) and internal bias-tees - Optional phase noise measurement application for absolute and residual phase/AM noise The Keysight N5224B and N5225B are PNA-series microwave network analyzers built around synthesizer revision 7 and offered in both 2-port and 4-port configurations. The N5224B covers 10 MHz to 43.5 GHz and the N5225B covers 10 MHz to 50 GHz, with optional Low-Frequency Extension hardware lowering the start frequency to 900 Hz. Both instruments characterize the magnitude and phase of a device's transmission and reflection responses (S-parameters) across these ranges. A vector network analyzer stimulates a device under test with a swept signal and measures how that device transmits and reflects energy, resolving both magnitude and phase at every frequency point. Beyond standard S-parameter sweeps, these analyzers support group-delay measurements, point-in-pulse and pulse-profile measurements through the rear-panel pulse I/O, and measurements on frequency-converting devices using external and remote mixers via the external test set driver and external IF inputs. With the optional phase noise measurement application, the instruments perform absolute phase noise and AM noise measurements along with single-channel and two-channel residual noise measurements. 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 instrument is backed by our team of test-and-measurement specialists; each used 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 Keysight Technologies traces its test-and-measurement heritage to Hewlett-Packard, whose instrument business was spun off as Agilent Technologies in 1999 and then established as Keysight Technologies in 2014. Products carrying the Keysight name continue that measurement lineage. ## Compare Other Models in This Series The N522xB PNA series places the N5224B and N5225B on a common platform that differs primarily in top frequency: the N5224B reaches 43.5 GHz and the N5225B reaches 50 GHz, both starting at 10 MHz, or at 900 Hz with the Low-Frequency Extension option. Each model is offered in 2-port and 4-port test-set configurations. Within each model, options scale capability from a base test set through added front-panel jumpers and an R1 receiver switch, source and receiver attenuators for extended power range, and internal bias-tees. Low-Frequency Extension variants add the hardware needed for measurements below 10 MHz. Each pre-owned model and configuration below is its own dedicated product page with condition-matched pricing. Choose the variant whose frequency range, port count, and option set match your application; the comparison table that follows summarizes how the models differ. The principal difference across the family is the upper frequency limit: the N5224B is specified to 43.5 GHz and the N5225B to 50 GHz. Both share the same 10 MHz standard low end, the same optional 900 Hz Low-Frequency Extension, and the same 2-port and 4-port architectures, so the comparison table focuses on frequency coverage alongside the option-driven differences. Option suffixes determine installed hardware rather than the core frequency range. The 2-port options (200, 201, 217, 219) and 4-port options (400, 401, 417, 419) add front-panel jumpers, an R1 receiver switch, extended-power-range attenuators, and bias-tees in increasing combinations, while the LFE options (205, 220, 405, 420) add low-frequency extension hardware. Refer to the comparison table for the per-model and per-option breakdown. Model Frequency Range Frequency Range (LFE) Test Port Connector **N5225B** 10 MHz to 50 GHz 900 Hz to 50 GHz 2.4 mm (male), 50 ohm N5224B 10 MHz to 43.5 GHz 900 Hz to 43.5 GHz 2.4 mm (male), 50 ohm Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - Bottom feet - Handles - Front and rear panel hardware ## Product Core & Specifications Specification Value Frequency Information (Table 23) N5225B Frequency Range 10 MHz to 50 GHz N5225B Frequency Range (LFE Options) 900 Hz to 50 GHz (typical 500 Hz to 900 Hz) Frequency Resolution 1 Hz Frequency Accuracy ±0.7 ppm Initial Frequency Accuracy ±0.2 ppm (typical ±0.1 ppm) System Dynamic Range at Test Port (dB), Options 200 or 400 - Specification 10 MHz to 50 MHz Ports 1,3: 87; Ports 2,4: 85 50 MHz to 100 MHz Ports 1,3: 103; Ports 2,4: 101 100 MHz to 250 MHz Ports 1,3: 110; Ports 2,4: 110 250 MHz to 500 MHz Ports 1,3: 119; Ports 2,4: 119 500 MHz to 1 GHz Ports 1,3: 127; Ports 2,4: 128 1 GHz to 2 GHz Ports 1,3: 133; Ports 2,4: 134 2 GHz to 3.2 GHz Ports 1,3: 131; Ports 2,4: 132 3.2 GHz to 10 GHz Ports 1,3: 135; Ports 2,4: 132 10 GHz to 13.5 GHz Ports 1,3: 130; Ports 2,4: 130 13.5 GHz to 16 GHz Ports 1,3: 130; Ports 2,4: 130 16 GHz to 20 GHz Ports 1,3: 130; Ports 2,4: 130 20 GHz to 24 GHz Ports 1,3: 132; Ports 2,4: 132 24 GHz to 26.5 GHz Ports 1,3: 132; Ports 2,4: 131 26.5 GHz to 30 GHz Ports 1,3: 127; Ports 2,4: 127 30 GHz to 32 GHz Ports 1,3: 128; Ports 2,4: 128 32 GHz to 35 GHz Ports 1,3: 128; Ports 2,4: 128 35 GHz to 40 GHz Ports 1,3: 123; Ports 2,4: 124 40 GHz to 43.5 GHz Ports 1,3: 123; Ports 2,4: 124 43.5 GHz to 47 GHz Ports 1,3: 123; Ports 2,4: 124 47 GHz to 50 GHz Ports 1,3: 114; Ports 2,4: 116 Maximum Leveled Power (dBm), All Ports, Option 200/400 - Specification (Table 24) 10 MHz to 50 MHz 12 50 MHz to 16 GHz 13 16 GHz to 26.5 GHz 13 26.5 GHz to 30 GHz 13 30 GHz to 32 GHz 13 32 GHz to 35 GHz 13 35 GHz to 43.5 GHz 10 43.5 GHz to 47 GHz 6 47 GHz to 50 GHz \-2 Noise Floor (dBm) @ 10 Hz IFBW, All Options, N5225B (Table 50) 10 MHz to 50 MHz Spec -70; Typical -75 50 MHz to 100 MHz Spec -85; Typical -91 100 MHz to 250 MHz Spec -95; Typical -100 250 MHz to 500 MHz Spec -102; Typical -107 500 MHz to 1 GHz Spec -106; Typical -112 1 GHz to 10 GHz Spec -114; Typical -118 10 GHz to 26.5 GHz Spec -114; Typical -120 26.5 GHz to 35 GHz Spec -110; Typical -116 35 GHz to 40 GHz Spec -108; Typical -116 40 GHz to 43.5 GHz Spec -108; Typical -114 43.5 GHz to 50 GHz Spec -109; Typical -116 Power (Tables 39, 40) Power Resolution 0.01 dB Maximum Settable Power 30 dBm (typical) Minimum Settable Power, Option 200, 201, 205, 400, 401, 405 \-30 dBm (typical) Minimum Settable Power, Option 217, 219, 220, 417, 419, 420 \-90 dBm (typical) Nominal Power (Preset), Option 200, 201, 205, 400, 401, 405 \-5 dBm Nominal Power (Preset), Option 217, 219, 220, 417, 419, 420 \-15 dBm 2nd and 3rd Harmonics at Max Specified Power (dBc), All Options - Typical (Table 41) 10 MHz to 50 MHz 2nd: -15; 3rd: -15 50 MHz to 2 GHz 2nd: -21; 3rd: -15 2 GHz to 13.5 GHz 2nd: -18; 3rd: -19 13.5 GHz to 16.7 GHz 2nd: -60; 3rd: -65 16.7 GHz to 25 GHz 2nd: -60; 3rd: -- Phase Noise (dBc/Hz), All Options, with UNY, Port 1, 3 - Typical (Tables 44, 46) CW 1 GHz \-112 (100 Hz), -132 (1 kHz), -137 (10 kHz), -143 (100 kHz), -145 (1 MHz), -144 (10 MHz) CW 5 GHz \-103 (100 Hz), -123 (1 kHz), -132 (10 kHz), -135 (100 kHz), -147 (1 MHz), -150 (10 MHz) CW 10 GHz \-96 (100 Hz), -116 (1 kHz), -126 (10 kHz), -130 (100 kHz), -142 (1 MHz), -146 (10 MHz) CW 20 GHz \-91 (100 Hz), -111 (1 kHz), -118 (10 kHz), -123 (100 kHz), -135 (1 MHz), -139 (10 MHz) CW 26.5 GHz \-87 (100 Hz), -106 (1 kHz), -115 (10 kHz), -121 (100 kHz), -131 (1 MHz), -135 (10 MHz) CW 43.5 GHz (SPD) \-82 (100 Hz), -106 (1 kHz), -113 (10 kHz), -117 (100 kHz), -129 (1 MHz), -135 (10 MHz) CW 50 GHz (SPD) \-81 (100 Hz), -101 (1 kHz), -109 (10 kHz), -116 (100 kHz), -127 (1 MHz), -132 (10 MHz) Damage Input Level, All Ports (Table 64) Option 200, 201, 219, 400, 401, 419 27 dBm, 40 V Option 217, 417 27 dBm, 7 V All LFE Options 20 dBm, 50 V General Information (Tables 75, 76) System IF Bandwidth Range 1 Hz to 15 MHz, nominal Maximum Number of Points 100003 > **Important:** Damage input level (RF, DC): 27 dBm / 40 V for Options 200, 201, 219, 400, 401, 419; 27 dBm / 7 V for Options 217, 417; and 20 dBm / 50 V for all LFE options. > **Important:** All specifications and characteristics apply over a 25 °C ±5 °C range (unless otherwise stated) and 90 minutes after the instrument has been turned on. > **Important:** Effective dynamic range must take measurement uncertainties and interfering signals into account. The extended dynamic range set-up should only be used when the receiver input will never exceed its maximum receiver input; the extended range is only available in one-path transmission measurements and may typically be degraded at particular frequencies below 500 MHz due to spurious receiver residuals. > **Important:** Corrected system performance specifications apply with the 85133F flexible test port cable set and a full 2-port calibration (environmental temperature 23 °C ±3 °C, with < 1 °C deviation from calibration temperature). A compatible calibration kit and test port cable set are required and are referenced separately in this document. > Recommended pairing: specified corrected performance is achieved with a full 2-port calibration using Keysight 85056A or 85056D mechanical cal kits, or the N4693A/N4693D electronic calibration modules. ## 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.** ## Details - **Price:** 0.0 USD - **Vendor:** Keysight - **Type:** Net Ana - **Tags:** product_manual_group_3 ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 0.00 USD | In stock | ## Images - Keysight N5225B 900 Hz to 50 GHz 2-Port and 4-Port PNA Network Analyzer (Pre-Owned) --- > Source: [ValueTronics](https://valuetronics.com/products/n5225b-keysight-network-analyzer-used) > Updated: 2026-06-20