RDS2 reception A modified existing tuner platform Hendrik van der Ploeg – Catena November 3 rd 2015
RDS2 reception A modified existing tuner platform
Hendrik van der Ploeg – Catena November 3rd 2015
Content
• Introduction/Goal • RDS2 demo at RDS Forum 2015 • Current RDS solution • Adaptations for single tuner RDS2 Demo • Demo PCB • Additional changes for tuner products with full RDS2
support • Conclusions
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Introduction/Goal
• Demo platform to show the advantages of the increase in data-rate of RDS2
• Demo platform enables measurements on RDS2 • Demo platform enables field-tests with RDS2 • Demo platform to show feasibility of products with RDS2
functionality
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First RDS2 Demo shown at RDS-Forum June 2015
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Tuner 0 TEF6688 RDS stream 0
Tuner 1 TEF6688 RDS stream 1
Tuner 2 TEF6688 RDS stream 2
Tuner 3 TEF6688 RDS stream 3
Baseband signal
0 2 4 6 8
x 104
-140
-120
-100
-80
-60
-40
-20
0
Frequency [kHz]Le
vel [
dB]
57.0KHz
66.5KHz
71.25KHz
76.0KHz
RDS2 Demo PCB with 4 tuners shown at RDS-Forum June 2015
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Antenna input
Audio output
Tuner 0 (TEF6688)
Tuner 1 (TEF6688) Tuner 2
(TEF6688) Tuner 3 (TEF6688)
USB connector
Host micro
Current RDS product implementation
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MPX
BW= 2.5kHz Decoded Groups
RDS DEMOD
RDS SYNC
BLOCK REG
RDS SOFTDEC
57kHz
• RDS implementation is partly done in Firmware
Single tuner RDS2 demo
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66.5kHz
MPX
BW= 12kHz
RDS DEMOD
9.5kHz
CLK
RDS demodulated stream 0 (normal RDS, 57kHz)
RDS DEMOD
4.75kHz
RDS DEMOD
0kHz
RDS DEMOD
-9.5kHz
RDS demodulated stream 1 (66.5KHz)
RDS demodulated stream 2 (71.25kHz)
RDS demodulated stream 3 (76kHz)
Based on TEF6688 product Only adaptations needed in Firmware
Host Micro for RDS decoding
RDS2 Demo Receiver
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RDS2 TEF6688 RDS demodulated stream 0
I2C RDS demodulated stream 1
RDS demodulated stream 2
RDS demodulated stream 3
• 4 times RDS demodulator implemented in firmware on a single tuner • Decoding not (yet) done on the tuner, currently done on Host Micro
RDS Decoder
RDS Decoder
RDS Decoder
RDS Decoder
Single tuner RDS2 Demo PCB
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Antenna input
Audio output Tuner (TEF6688)
USB connector
Host micro
Demo host-firmware and PC-software by MacBe
Full-feature single tuner RDS2
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66.5kHz
MPX
BW= 12kHz
RDS DEMOD
9.5kHz
CLK
Decoded Groups
RDS DEMOD
4.75kHz
RDS DEMOD
0kHz
RDS DEMOD
-9.5kHz
RDS SYNC
RDS SOFTDEC
MUX DE-MUX
Decoded Groups
Decoded Groups
Decoded Groups
BLOCK REG
BLOCK REG
BLOCK REG
BLOCK REG
Based on TEF6688 product Only adaptations needed in Firmware
Conclusions
• A commercial tuner with adapted firmware is shown to demonstrate RDS2 reception on a single tuner device
• The demonstrator will be used for further evaluations on the RDS2 system
• Fully integrated RDS2 decoding can be created with recent released tuner platforms by firmware updates without hardware redesign
• RDS2 tuners may be introduced shortly after market shows interest for RDS2 and services become available
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