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Page three menu
PRE: The switch of the preamplifier. When the
preamplifier is turned on, the small white point
before the PRE in the upper left corner of the
screen will be displayed, indicating that the
preamplifier is turned on; when the preamplifier is
turned off, the white point becomes hollow.
ATT: Switch of the pre-fader.
SPL: Inter-frequency transceiver.