What is NOT a recommended action to improve spectral trace quality?

To improve spectral trace quality, it is essential to focus on the settings that enhance the clarity and accuracy of the Doppler signal being assessed. Increasing the machine volume is not an action that directly influences spectral trace quality; rather, it merely amplifies the sound level, which can lead to potential noise interference without improving the actual signal clarity.

Improving spectral trace quality typically involves adjustments such as decreasing gain to reduce the noise level, using a different wall plug to address power issues, or adjusting the wall filter to eliminate low-frequency noise artifacts. These parameters work to refine the settings that optimize the signal captured from the vessel, ensuring that the Doppler readings accurately reflect hemodynamic conditions. Thus, the action of increasing machine volume does not contribute to enhancing the quality of the spectral trace in a meaningful way.