Yup, I earned every one of these gray hairs the hard
way - by living long enough. (And by doing the opposite of what
politicians told me to do? I met Willy Ley. I met a Gulag
survivor. I had a professor with a number tatoo on the wrist. It's
amazing what living long enough gives one in terms of raw
experience. Um, I also met a man my mother dated well before I was
born - the original radio Lone Ranger. Don't sell old folks
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On 20220206 10:26:15, Siegfried
... hmmm thats a long time ago... you must be an old lady :-)
Am 06.02.2022 um 19:23 schrieb jdow:
(And for the record, I did hear Sputnik
on the school's radio club radio.)
On 20220206 10:19:42, jdow wrote:
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.
On 20220206 01:50:00, h. garcia
Hey Simon, JDow -- very good morning to you and everyone in
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
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 pauses/silences.
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 up.
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.