Soft Clipper
– the soft clipper can add fullness and warmth to the sound
without adding harsh distortion. When the soft clipper is in use it will be
normal for the MPX Process control to be operated somewhat below 0dB
due to the soft clipper’s gentle transfer function.
Hard Clipper
– AirAura’s hard clipper can be driven quite hard without
generating the usual artifacts associated with other composite clippers
when operated above threshold.
Pilot Injection
The pilot injection control adjusts the 19kHz stereo pilot amplitude and is
adjustable from 0 (Off, to make the station transmit in Mono) to 20% of the main
composite signal amplitude in 0.1% steps.
SCA-1 and SCA-2 Inputs
Inputs such as SCA or RDS are applied to the SCA connectors and then digitized
at 192kHz. Prior to being digitized the signals are high pass filtered at 1kHz to
reduce hum and then brick wall low-pass filtered at 94kHz. This control can be
set to OFF or to levels from -79.95dB to +10.0dB in 0.05dB steps.
TX-1 and TX-2 Outputs
These controls adjust the output amplitude of the signals appearing at the rear
panel BNC
and
XLR connectors when the Output Mode is MPX. These controls
can be set to OFF or to levels from -79.95dB to +6.00dB in 0.05dB steps.
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