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FM VERSION DESCRIPTION ENG
Page 20
11.6 AUXILIARY INPUTS
The Aux inputs allow the Mpx, SCA, RDS injection from external coders. The resultant
signal (f.i. external RDS+ self-generated MPX) is available on the Output connector.
Remarks:
When using an external RDS encoder, the internal RDS one must be disabled.
The level of the injected signal may be adjusted by means of the trimmer next to the
corresponding BNC connector (no software control is provided
for this purpose). This
trimmer is factory preset for a gain of 0 dB.
Suggested RDS injection level is -31.5 dBm (≈ 60mVpp / 2.0 kHz deviation) in relation to
an MPX output of 0 dBm (2.2 Vpp, 0.776 Vrms).
AUX Input impedance is 10 KOhm.
11.7 ANALOG AUDIO INPUT (Female XLR)
Balanced XLR-type connectors are used for input analog audio.
The stereo analog inputs are designed for standard 0 dBu balanced signals. Input level
setting (Sensibility) is done using the software parameter settings (see par. 12.1).
XLR pinout:
Pin 1 Gnd
Pin 2 Signal
Pin 3 Return
In case of unbalanced connections, please connect the cold pole (Pin 3) to the ground (Pin
1).
Factory preset input impedance is 10 kOhm. This impedance may also be set to 600Ohm
by moving the two internal jumpers on the INPUT board (see Chapter 19 - hardware
settings).