FTA-310 OperATing MAnuAl24Pitch ControlThe FTA-310 includes a feature that lets you choosefour special receiver audio responses to allow the mostcomfortable and/or effective reception in noisy envi-ronments. The effect is similar to that provided by an“Equalizer” in a stereo. Press the [F] key mo-mentarily, then pressthe [5 (PITCH)] key.This instantly recallsMenu Item 31 “P I T ”which selects the re-ceiver audio responses. Rotate the DIAL selectorknob to select desired receiv-er audio response. Availableselections are:oFF: The received audio signal does not passthrough the equalizer circuit.MD1: The received audio is passed without roll-offon the high or low ends.MD2: The received audio is enhanced in the low-and mid-range frequencies.MD3: The received audio is enhanced in the mid-and high-range frequencies.advanced operatIonUSR: The received audio is shaped per a user-configured audio response programmed viaMenu Items 26 “UP_L,” 27 “UP_M,” and 28“UP_H.” The default setting enhances theaudio in the lower frequency range, and re-duces the level of the higher-frequency com-ponents. When you have made your selection, press down-ward on the VOLUME knob to save the new set-ting, and then press the PTT key exit to normaloperation.selectIonoFFMD1MD2MD3USERlow- range0++–+mId- range0+++0HIgH- range0+–+–responseNormalFull BoostLow BoostHigh BoostDefault