描述：The left and right audio outputs are available at RCA jacks CN104 and CN105 respectively. The outputs are taken from the low-pass filter, which has a gain of 2. The low-pass filter may be configured for one of two cutoff frequencies: 54kHz or 108kHz. Typically, the 54kHz cutoff frequency is used for all measurements. For f-3dB = 54kHz, jumpers JP101 through JP106 must all be installed. For f-3dB = 108kHz, jumpers JP101 through JP106 must all be removed.