RDS P232U, Быстрое руководство по установке, Страница: 5 / 15

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2.1.2 LED indicators
Two LED diodes are used to indicate operating status of the RDS encoder:
Pilot LED Operation LED Status
Start-up
on off Initialization
off on Firmware update in progress
Operation
· · · · · Normal operation
- - - - -
An error occurred (encoder’s hw failure)
on Receiving data on some port
on External pilot synchronization is active
off Internal clock source is selected
- - - - -
Stereo encoder error - pilot tone present but does not meet
the specification required.
Solution: Switch the RDS encoder to internal clock source.
2.2 Rear Panel
RS-232 OUTPUT INPUT GPIO 12V DC
LOOP SIDE
USB
PORT 1 PORT 2
Connector or element Description
12V DC Power Supply Power supply connector. See section 3.3 for details.
USB USB standard B type connector. This port is referenced as “ Port 2 ”.
Use the USB for initial setup of the encoder or for its local control.
The encoder operates also with no cable connected.
RS-232 RS-232 standard male type connector. This port is referenced as “ Port 1 ”.
For wiring, see the section 3.4.
The port is internally optically isolated from the rest of the encoder’s circuitry to prevent ground
loops and to keep high ESD immunity and EMC.
The encoder operates also with no cable connected.
Output BNC RDS signal output, modulated at 57 kHz subcarrier.
If the Loop/Side switch is set to the LOOP position, the Output is a sum of the RDS signal and the signal fed
to the Input BNC connector.
Input BNC Optional input for synchronization to the pilot tone or for mixing the RDS signal with existing modulation
signal.
Loop/Side switch Allows the input signal to be added to the output signal. See sections 3.1 and 3.2 for details.
GPIO Optional logical inputs for direct control of some RDS services (TA, PROGRAM).
See the Technical manual for details. The connector is a standard 6-pin PS/2 type.