60 MDS™ Master Station MDS 05-6399A01, Rev. F
Audio
Audio settings are only available for configuration when the radio is configured to
operate in x710 compatibility mode.
• Audio Enabled – If enabled, the radio’s transmit functionality will switch to analog
whenever PTT is asserted.
• Rx Level – Receive audio output level to modem (dBm). Received signal at the peak
deviation will be scaled to the specified value. Valid range is (-20 0).
• Tx Level Auto – Automatically adjust transmit audio input level from Modem.
• Tx Level – Transmit audio input level from modem (dBm). A transmit input signal of the
specified value will translate into the specified peak deviation for transmit. Valid range is
(-20 0).
• Emphasis – When enabled, pre-emphasis is applied on the transmitter and de-emphasis is
applied on the receiver. This setting is typically used in operation with voice radios.
• Squelch – When set to auto, the transceiver will use its internal squelch to enable
transmission of audio signals. When set to bypassed, the transceiver will transmit all audio
signals regardless of level.
• Vox Enabled – Enables or disables the integrated VOX threshold circuit.
• Vox Threshold – The audio interface on the Master Station incorporates an integrated
VOX circuit to sample the voltage produced by a connected audio device. When the
voltage exceeds a user-defined threshold, Push to Talk (PTT) is activated, resulting in the
transmitter being enabled. The VOX circuit detects a voltage in the range of 0-2 Volts. A
single number in the range of 0-15 is used to describe the desired threshold level. For
example a value of 7 is approximately 1 volt.
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