Please - it's ALL Simon, really. He is the guilty
party in this endeavor. I'm just an over educated gadfly on the
sidelines. And, indeed, SDRC is so fantastic it's hard to believe
looking at it from a "first licensed in 1959" vantage point.
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On 20220206 01:50:00, h. garcia wrote:
Hey Simon, JDow -- very good morning to you and everyone in the
I've been reading the exchanges in this thread and I found it
fascinating! Thank you so much!
To be honest, I've haven't checked if we have more recent topics
on the WFM MPX demodulador and the RDS modem.
Anyways, just wanted to share how impressed I'm with the RDS
decoder available in small radios like Sangean DT-800 or XHData
D-808 leveraged by Skyworks (former SiLabs) ICs Si47xx.
Like you described before, if one checks the MPX spectrum, very
often the RDS carrier is obliterated by the audio peaks. BER
indicator (RDS Spy shows it) improves a lot during soft music ou
Nevertheless, the Si47xx seems to cope way better these scenarios.
I've got a station where the DT-800 shows the station name in no
more than 10-15s. Over the PC, sometimes it takes 2 min to show
I've been checking the Si47xx documentation and they includes some
very clever DSP techniques to condition the RF signal and MPX
output. For instance, the IC is aware of selective fading and
tries to handle that.
Unsure how this helps the group, hi! Just wanted to share Si47xx
seems a really nice piece of FM and RDS and its documentation,
despite not revealing how it's done, shows all real life
constraints the IC designers had to overcome.