d. VOICE RECEPTION
Tune receiver-transmitter (or telephone isolation amplifier) to the
correct frequency, and fine tune as necessary for correct operation.
Set METER FUNCTION at RCV LEVEL.
A signal must be received at receiver-transmitter or
telephone isolation amplifier in order to properly
adjust AUDIO GAIN controls.
Adjust AUDIO GAIN at receiver-transmitter (or telephone isolation
amplifier) until modem METE R registers within the boxed area