RDS1 RDS Encoder
Technical manual
No part of this manual may be re-produced in any form without prior written permission from BW Broadcast.
The information and specifications contained in this document is subject to change at any time without notice.
Copyright 2009 BW Broadcast
www.bwbroadcast.com
RDS1 – Stand-Alone RDS Encoder
Unit Summary
The BW Broadcast RDS1 provides a low cost alternative to encoders costing up to 10
times more. With a liquid crystal display and simple 4-button operation, setup is child's
play. No computers are needed and the unit will provide all that is needed for a basic
radio data system setup.
FEATURES
• LCD Driven. (No computer needed)
• Memory Backup
(EEPROM Storage)
RDS SPECIFICATIONS
RDS Frequency 57 kHz +/- 4Hz
RDS Level 0-1V Peak-to-Peak (adjustable)
RDS Groups 0B (CENELEC STANDARD)
RDS FACILITIES
PS: Program service name. The eight characters you see on the tuner with the
stations name or callsign.
PI: Program Identification. Four character hexadecimal code that identifies the
station. This code is usually allocated to you by your local radio authority.
PTY: Program type. Identifies the station format or style. One of 32 Fixed
formats are allowed. Examples are Sport, Pop M and News.
.
M/S. Music/Speech. Indicates if station is primarily music or speech based.
• Crystal Controlle d Mic roprocessor
• Audio Mix Facility.
OTHER
Power Requirements 100-240V AC 50-60Hz
Connectors MPX Input (BNC), RDS/MPX Output (BNC).
RDS1 – User Manual Page 1 of 3
SYSTEM SETUP
The RDS coder is very simple to setup and maybe connected to your broadcast
transmitter in one of two ways:
1. RDS-Out to SCA-In
If your transmitter has a dedicated RDS/SCA input then setup is as simple as
connecting the output from the RDS1 encoder (RDS/MPX Out) to the RDS/SCA
input of your transmitter.
2. MPX In to RDS/MPX-Out
If you do not have a dedicated RDS/SCA input on your transmitter then we
recommend you use the virtual earth mixing facility on the RDS coder to combine
your audio or multiplex signal with the RDS sub-carrier. Connect your audio
input to the MPX input port. Th is will be combined with the RDS signal in the
RDS1 and the resulting MPX/RDS signal will be present at the MPX/RDS output
port.
Once you have connected your RDS, without any audio signal, use a small
screwdriver to adjust the RDS1 level control on the front of the RDS coder to
achieve 2.6 kHz deviation on the FM transmitter. ( CCW will increase the signal
level ). This will set your RDS signal at the correct level.
Stereo Encoder
RDS1 -Encoder
Stereo Encoder
MPX/Audio
RDS1 -Encoder
MPX
MPX/RDS
Transmitter
MPX
RDS
Transmitter
INPUT
RDS1 – User Manual Page 2 of 3
PROGRAMMING THE RDS1
After powering up the RDS1 you will see on the LCD screen all of the information
currently programmed in the unit: PS, Speech/Music, PI, PTY.
By pressing the Left or Right arrow buttons you will place the RDS1 into ‘Edit’ mode.
While in ‘Edit’ mode there will be no RDS output and a flashing cursor will be seen on
the LCD display. Use the Left and Right arrow buttons to select the character or setting
that needs to be changed. When the selected character or setting is highlighted by the
flashing cursor, use the Up and Down arrow buttons to scroll through available options.
When the correct character or setting has been selected, use the Left and Right arrow
buttons to move to the next character or setting. If no more changes need to be made
don’t touch any buttons for 20 seconds. If no buttons are pressed for 20 seconds the
‘Edit’ mode will timeout, settings will be saved and the RDS1 will continue to transmit
an RDS signal. When the RDS1 has exited ‘Edit’ mode, the flashing cursor will
disappear.
RDS1 – User Manual Page 3 of 3
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