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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