How to Perform RF Amplifier Gain Testing

Get Quote
Signal Generator
+ Signal Generator
Signal Generator
+ Signal Generator

Accelerating Amplifier Testing with a High-power, Fast Signal Generator

Accurately characterizing amplifier gain in RF and microwave devices requires a precise, repeatable measurement method. A signal generator provides a known input power level (Pin) to the amplifier under test, while a power sensor or signal analyzer measures the resulting output power (Pout). The gain, expressed in decibels as 10 × log₁₀(Pout / Pin), quantifies the amplifier’s ability to boost signal strength. During design, engineers monitor this relationship to optimize linearity and output efficiency, while accurate measurements rely on careful power calibration and quick, stable source control.

When testing gain compression, where output power saturates and gain drops by 1 dB (the P1dB point), high-power signal sources are crucial to drive amplifiers into compression without distortion. With sufficient output drive and low distortion, these sources offer the dynamic range and speed needed for efficient, high-volume amplifier testing. In manufacturing, technicians ensure production quality by verifying gain consistency across frequency ranges and power levels, which makes fast frequency and amplitude switching essential for maximizing throughput.

RF Amplifier Gain Testing Solution

Testing amplifier gain in RF and microwave devices requires accurate signal generation over a range of frequencies, plus high output power to test gain compression. The Keysight compact, cost-effective analog signal generator offers fast frequency switching times down to 200 microseconds, optimizing throughput in manufacturing tests.

Plus, the compact analog signal generator delivers up to +23 dBm output power, enabling precise characterization of high-power amplifiers while compensating for system losses. It also delivers exceptional signal purity with low phase noise of -130 dBc/Hz at 1 GHz (20 kHz offset), minimal spurious signals, and harmonics as low as -40 dBc at 1 GHz. The test instrument is available in a 3U form factor with a front-panel interface (pictured) or in a headless 1U form factor.

 

Get Quote

Explore Products in Our RF Amplifier Gain Testing Solution

Related Use Cases

How to Characterize 802.11ad Devices

Characterizing 802.11ad devices requires the generation and analysis of waveforms at baseband, IF, RF, and mmWave frequencies. Learn how to characterize wireless gigabit devices with three essential elements — waveform generation, frequency conversion, signal, modulation, and spectrum analysis.

Learn More

How to Generate an RF Carrier Signal

Generating an RF carrier signal requires an RF signal generator that provides frequency stability and low phase noise and is free of other spurious noises. Learn how to set up an RF signal generator for a carrier signal and optimize the noise settings.

Learn More

How to De-embed Fixtures and Correct Mismatch Errors

Minimizing the uncertainty in your measurement setup requires delivering predictable and repeatable signals to your device under test (DUT). Learn how to easily de-embed and match correct test fixtures with a signal generator and an embedded reflectometer.

Learn More

contact us logo

Get In Touch with One of Our Experts

Need help finding the right solution for you?

Contact Us