The Keysight E5061B is an ENA-series vector network analyzer that characterizes the magnitude and phase of the reflection and transmission (S-parameter) response of components and networks. It spans 100 kHz to 1.5 GHz or 3 GHz in its RF network analyzer configurations, and from 5 Hz up to 500 MHz, 1.5 GHz, or 3 GHz in its LF-RF configurations, addressing both low-frequency and RF measurement needs in a single bench instrument.

As a vector network analyzer, the E5061B measures S-parameters and converts them into related quantities including reflection and transmission impedance, reflection and transmission admittance, and 1/S. Beyond standard S-parameter work, the LF-RF configurations add gain-phase measurement, and option-based capabilities extend the instrument to impedance measurement and equivalent-circuit analysis (Option 005), wireless power transfer circuit evaluation with 2D/3D simulation (Option 006), and fault location with time-domain transformation (Option 010).

ValueTronics stocks and holds its own inventory in a 20,000-square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Because instruments are held on our own shelves, we can confirm condition and configuration before an order goes out the door.

Brand Heritage

Keysight Technologies traces its test-and-measurement heritage to Hewlett-Packard, whose instrument business was spun off as Agilent Technologies in 1999. Agilent's electronic measurement division was then established as Keysight Technologies in 2014, the brand under which this analyzer is produced today.

Compare Other Models in This Series

The E5061B ENA vector network analyzer is offered in a range of test-set configurations that share a common platform but differ in frequency coverage, system impedance, and measurement capability. The RF network analyzer options provide 50 Ω or 75 Ω system impedance with coverage to 1.5 GHz or 3 GHz, available as transmission/reflection or S-parameter test sets.

A separate group of LF-RF options (3L3, 3L4, and 3L5) extends measurement coverage down to 5 Hz and adds a built-in DC bias source and gain-phase measurement, reaching 500 MHz, 1.5 GHz, or 3 GHz at the upper end depending on the option chosen.

Each new model linked below is its own dedicated product page with condition-matched pricing. Select the configuration whose frequency range, system impedance, and measurement set matches your application, and review its individual page for the specifications and pricing that apply to that new unit.

The clearest differences across the family are frequency coverage and system impedance — the 1.5 GHz versus 3 GHz tiers, 50 Ω versus 75 Ω system impedance, and the LF-RF options that begin at 5 Hz. Measurement capability also varies by configuration: transmission/reflection test sets (Options 115, 135, 117, 137) measure S11, S21, and absolute power, while S-parameter test sets (Options 215, 235, 237) add S12 and S22.

The LF-RF options (3L3, 3L4, 3L5) provide the full S-parameter set along with T/R, T, R, and absolute measurements, plus the DC bias source and gain-phase ports. See the comparison table for the per-option frequency ranges, system impedance, test-set type, and measurement parameters.

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 test port input level: +10 dBm.

Important: Line power requires a third-wire ground.

Important: The GPIB interface is optional. To include this interface, order E5061B-721.

Important: Option 005 (Impedance Measurement Analysis) can be installed with Option 3L3/3L4/3L5 only.

Important: Option 006 (Wireless Power Transfer Analysis) can be installed with Option 215/235/3L5 only.

Important: Degradation of some product specifications can occur in the presence of ambient power frequency magnetic fields of 30 A/m or greater; the product self-recovers when removed or shielded from the field. It is recommended to keep clearance between the cooling fans (left side) and magnetically sensitive devices.

Recommended pairing: the corrected-performance specifications are referenced to Keysight Type-N calibration kits — the 85032F (50 Ω) or 85036B (75 Ω) — or the 85092C ECal module.

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.