The Agilent ESA-E Series comprises five swept spectrum analyzers — the E4401B, E4402B, E4404B, E4405B, and E4407B — sharing a common platform and differing principally in their upper frequency limit. Internal mixing covers 9 kHz at the low end and extends to 1.5 GHz, 3.0 GHz, 6.7 GHz, 13.2 GHz, and 26.5 GHz respectively across the family, with the E4407B reaching 325 GHz when configured for external mixing.

A spectrum analyzer displays signal amplitude as a function of frequency, letting an engineer see the spectral content of a signal — carriers, harmonics, sidebands, and noise. Within the ESA-E platform, the specifications support W-CDMA adjacent channel power ratio measurements, EMI measurements using the 9 kHz and 120 kHz (-6 dB) EMI bandwidths, FM demodulation (Option BAA), and TV trigger with picture-on-screen for NTSC, PAL, and SECAM standards (Option B7B).

ValueTronics stocks its instruments directly from a 20,000 sq ft 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 ship factory-sealed exactly as received from the manufacturer. That combination of real inventory and hands-on verification is what separates a specialist source from a listing aggregator.

Brand Heritage

The test and measurement business that issued this product line was spun off from Hewlett-Packard as Agilent Technologies in 1999. Agilent's electronic measurement division was later established as Keysight Technologies in 2014. Datasheets and branding from this era therefore carry the Agilent name.

Compare Other Models in This Series

The ESA-E Series is presented as a single family of five spectrum analyzers built on a common platform, sharing resolution bandwidth ranges, trace detectors, display architecture, and option set. The models are distinguished primarily by their upper frequency limit, which steps from 1.5 GHz on the E4401B through 3.0 GHz, 6.7 GHz, and 13.2 GHz to 26.5 GHz on the E4407B.

Because the platform is shared, an instrument selected from anywhere in the family carries the same measurement workflow, the same RBW and VBW structure, and the same optional capabilities such as the tracking generator, internal preamplifier, narrow-RBW option, and time-gated analysis. The choice between models is therefore largely a question of how much frequency coverage the application requires.

Each model below links to its own dedicated product page with condition-matched pricing. Whether you select a pre-owned unit of a given model, the page you reach reflects the specific model and condition you are evaluating, so the specifications and price shown apply to that exact configuration.

The defining difference across the family is internal frequency coverage: 9 kHz to 1.5 GHz (E4401B), to 3.0 GHz (E4402B), to 6.7 GHz (E4404B), to 13.2 GHz (E4405B), and to 26.5 GHz (E4407B), with the E4407B extending to 325 GHz via external mixing (Option AYZ). Input attenuator range is 0 to 60 dB in 5 dB steps on the E4401B and 0 to 65 dB on the others. See the comparison table for the per-model values.

Secondary differences track the frequency tiers. The optional Option 1DS preamplifier covers 100 kHz to 1.5 GHz with a 4 dB noise figure on the E4401B and 1 MHz to 3 GHz with a 5 dB noise figure on the remaining models, and weight rises from 13.2 kg on the E4401B to 15.5 kg on the E4402B and 17.1 kg on the E4404B/05B/07B. Local measurement rates and DANL figures also vary by model as shown in the comparison table.

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 safe input level: +30 dBm average continuous power (input attenuator >=15 dB on the E4401B, >=5 dB on the E4402B/04B/05B/07B).

Important: Published specifications apply over 0 °C to +55 °C unless otherwise noted, and only when the analyzer is within its one-year calibration cycle, with AUTO ALIGN [ALL] selected, after a minimum 2-hour soak within the operating temperature range, at least 5 minutes of warm-up, and with Align Now RF run once every 24-hour period. Characteristics describe useful performance that is not covered by the product warranty.

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.