Mpx - DEVA Broadcast DB9009-RX Maintenance And Operation Instruction Manual

MPX

MPX Source – Set the preferred MPX Source.
Stereo & RDS Gen
Calibration Tone 400Hz
connected to the MPX output.
General
– The settings of the Stereo Generator are applied through this section.
Stereo Mode – Switch between Stereo and Mono Mode for MPX signal. Note that Mono Mode
disables the 38 kHz sub-carrier.
Emphasis – The pre-emphasis operation consists of amplifying the high audio frequency levels
as compared to the low audio frequencies. The purpose of this is to reduce the signal/noise ratio
in a proportion of 10 to 15dB by performing the inverse operation at the receiving level. There is
50µS for Europe and 75µS for USA options available.
Injection Levels
Multiplex Signal.
Audio Gain – Allows audio gain at the input of the Stereo coder to be selected. By default, the
Audio Gain is set to 0 dB.
Pilot
– Adjusts the modulation level of the pilot tone as a component of the MPX signal.
RDS – Adjusts the modulation level of the RDS subcarrier as a component of the MPXsignal
Phase Adjustment
carrier (57 kHz) are factory adjusted. Additional adjustments can be made by the user providing
more flexibility in DB9009-RX settings.
– MPX generated from the built-in Stereo and RDS Generator.
- single tone of 400Hz, used for calibrating of the inputs of the devices
– Set the levels of the components included in the obtained final Stereo
– The phase of the Pilot Tone, L-R sub-carrier (38 kHz) and RDS sub-
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