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FFT Spectrum Analyzer Menu The RTA menu allows you to monitor the same sources as those mentioned in the Oscilloscope menu section. The Delay control works the same here as it does previous and subsequent display sections. The Resolution control selects the number of frequency bands into which the audio is divided. 1x resolution gives you a refresh rate of approximately 48 frames per second and a frequency resolution sufficient for viewing the entire audio spectrum. 8x resolutions gives you a refresh rate of approximately 6 frames per second, but a much finer frequency resolution. The Decay Rate control adjusts how quickly the display will fall after a peak is displayed. Lower settings are the slowest, while the highest setting is instantaneous. The Peak Hold control enables or disables the ability to indicate and hold the highest peak achieved. Peak Hold is displayed in the dark green background layer. The X-­‐Center control centers the display at the selected frequency. The X-­‐Width control sets the displayed frequency range in kHz. The Y-­‐Center control centers the display vertically around the selected level in dB. The Y-­‐Range control sets the displayed level range in dB. The dB Scale Position control allows you to move the dB scale horizontally to a different place in the display. Advancing the control completely to the right places it in front of the graph at all times. 58