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SDC100
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User Manual
Rev. 3.0 - 09/10/01
8.4
Power Supply Card
The switching power supply drives the main card and panel card. This power
supply operates automatically the exchange between mai power supply and
external power supply at 24Vdc.
8.5
Panel Card
This card is fixed on the front panel. The panel card allows to display the Left/
Right and SCA/MPX signals level trough a level meter on a scale from -48 dB to
+6 dB for the Left/Right/SCA signals and a scale from -48 dBm to +6 dBm for MPX
signal.
The standard adjusting level for the Left and Right channels is 0 dB (yellow LED
ON).
8.6
Stereo Coder Card
The stereo coder card is fixed on the main card and is subdivived in two sections:
filtering and coding.
This card, that is the most important card of the SDC100, provides to elaborate
the signals coming from the main card and to transform then in stereo signal.
8.7
R.D.S. Card (optional)
The R.D.S. card allows to transmit, with the radio signal (mono or stereo), a data
channel as specified in the paper "Specification of the radio data system (RDS)",
which is issued by the European Committee for Electrotechnical Standardization
(CENELEC) Ref. N° EN 50067.
The pourpose of this card is to manage some of the principal services defined by
the standard CENELEC EN 50067 as: TP, TA.
As follows, we’ll mention a short description about the function of each of these
services.
TP - TRAFFIC PROGRAM IDENTIFICATION: this service indicates with a signal
on the receiver display that the program we’re receiving includes traffic news.
TA - TRAFFIC-ANNOUNCEMENT IDENTIFICATION: it’ used to indicate to the
car-driver that the traffic news are on air. The receiver could use the signal in one
of the following modes:
a)
To switch automatically from the Tape (or from the Compact Disk) to the
radio;
b)
To automatically switch on the radio when the traffic news begin;
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