User's Manual
MDS 05-6399A01, Rev. D MDS Master Station 53
5.6.5.1.3 AudioSettings
NOTE: 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 – 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).
Tx Level Auto – Automatically adjust transmit audio input level from Modem.
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.
Vox Enabled – Enables or disables the integrated VOX threshold.
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.