7
RS-232
OUTPUT
INPUT
GPIO
12V DC
LOOP
USB
PORT 1
PORT 2
Stereo encoder
FM Transmitter
RDS Encoder
MPX input
MPX output
Both stereo encoder and FM transmitter with only one MPX connector provided - loopthrough mode.
Use this mode only if no of the previous connections is possible.
RS- 232
OUTPUT
INPUT
GPIO
12V DC
SIDE
USB
PORT 1
PORT 2
FM Transmitter with
integrated stereo encoder
RDS Encoder
Pilot/MPX output
RDS/SCA/MPX input
FM transmitter with integrated stereo encoder.
In case of
mono
transmission (no stereo encoder used) the RDS encoder input may be left unconnected (since there is no need of external
synchronization) or it may be used for the audio signal injection in the case that the FM transmitter has only one input connector.
3.2
Hardware Settings
3.2.1
On-board adjustable elements
Due to completely DSP-based solution there’s no adjustable element on the board affecting the RDS or MPX signal.
3.2.2
Loop/Side switch
Select the LOOP position only if it’s necessary to pass the input signal to the output of the RDS encoder (loopthrough mode).
In all other cases the switch must be fixed in the SIDE position!
Always make sure that the switch is securely fixed in the position desired and eliminate possibility of unwanted change of its state!
3.3
Power Supply
The RDS encoder can be supplied from any power supply, which delivers a stabilized DC 12 V voltage and a current of at least 300 mA.
Commonly available switching wall adapters are usually suitable for that purpose. The RDS encoder includes polarity and short-circuit
protection. The central conductor of the power supply connector is positive (+).
Note: After first power-up, there is no need to configure anything to turn on the RDS subcarrier. The RDS encoder will immediately start to
generate the RDS signal with factory default values (PS: * RDS *, PI: FFFF, RDS level: set to 2 V p-p).