HP 8654A is a high-quality signal generator designed for use in various applications. It offers a wide frequency range of 10 to 520 MHz, making it suitable for testing and troubleshooting electronic devices and systems in the RF spectrum. The 8654A provides accurate and stable frequency generation with a stability of <40 ppm/5 minutes and an accuracy of +2% after 1-hour warmup.

The HP 8654A features precise output level control, with a range of +10 dBm to -130 dBm in 10 dB steps and a 13 dB vernier, allowing for precise signal level adjustment. It has excellent spectral purity, with harmonic distortion >20 dB below the carrier and subharmonics and non-harmonic spurious signals being non-measurable. The residual FM is <0.5 ppm in a 0.33 kHz post-detection noise bandwidth.