User manual

MPX BOARD CONNECTIONS (FM VERSION ONLY) ENG
Page 21
15 MPX BOARD CONNECTIONS (FM VERSION ONLY)
Available as an option on the FM version, the MPX board supports many configurations and operation modes.
15.1 DEFAULT MPX BOARD CONFIGURATION (FM-MPX VERSION ONLY)
When not otherwise specified, the MPX board comes with J2, J4 and J5 jumpers closed and with OUT-2 output
disabled
.
The AUX 2 input (BNC connector, 10 kOhm impedance) allows an external signal
(tipically RDS) from an external encoder to be injected on the MPX output of the
processor.
The level of the injected RDS signal may be adjusted by means of the trimmer next
to the corresponding BNC connector. This trimmer is factor preset for a gain of 0 dB.
The setting range is between -
∞ and +12 dB.
The AUX-1 input (BNC connector, 10 kOhm impedance) allows you to inject an external signal (tipically SCA) from an
external device on the MPX processor output.
The level of the injected SCA signal may be adjusted by means of the trimmer next to the corresponding BNC connector.
This trimmer is factor preset for a gain of 0 dB. The setting range is between -inf and +12 dB.
The processor can mix SCA signals of any frequency with its own MPX signal, as long as the former
are compatible with the composite stereo signal and RDS signal spectra. The RDS encoder inside
the processor must be disabled before using an external RDS encoder.