4391A RF Power Analyst

Peak & CW Power Meter for Modulated RF

The Bird 4391A RF Power Analyst supports PEP and pulsed power measurements for systems like DME, ATC, telemetry, and radar—when operating within supported pulse widths, repetition rates, and with the appropriate plug-in element. Built to handle modulated environments that require precision and repeatability, without external couplers or conversion charts.

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Why Choose the 4391A?

True PEP & Pulse Power

Measure peak, CW, and pulsed RF signals—no external couplers, no conversions, no guesswork.

Built for Modulated RF

Used in applications like DME, radar, and telemetry to measure PEP and pulse power.

Forward & Reflected, Instantly

Dual-element design shows match/mismatch in real time—no swapping.

Why RF Professionals Still Trust the 4391A

Field-proven and dependable, the Bird 4391A delivers accurate, repeatable power measurements—without the need for external couplers or manual conversions.

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Trusted Accuracy for Modulated & Pulsed RF

It reliably handles DME, ATC, telemetry, and radar signal types with onboard processing.

Simplified Testing, Field-Proven Results

Handles CW, PEP, and pulsed signals with internal processing—no need for external accessories.

Drop-in compatibility

Works with existing Bird elements, connectors, and setups.

4391A Specification

Model Number

4391A button_text

450 kHz to 1.2 GHz

100 mW to 10 kW

Power Readings: ± 5% of full scale, CW, ± 8% PEP

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Need Calibration?

Bird Calibration Services

Keeping equipment calibrated is the number one way to ensure performance and longevity. A Bird Calibration means we fully test your equipment and adjust it as needed to ensure it’s meeting specs.

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A Legacy of Trust. A Future of Simplicity.

For decades, Bird’s element-based wattmeters have set the standard for accuracy, durability, and technician-trusted performance. That legacy continues—but so does the evolution.

Whether you prefer the familiar reliability of plug-in elements or you're exploring the ease of new generation RF power measurement, Bird is here to support your journey.

Our expanding lineup of RF power measurement tools offers options for every workflow—rooted in accuracy, built for what’s next.

Because in RF, confidence doesn’t come from guessing. It comes from Bird.

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