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From: Lee K. Gleason on 27 Jun 2010 18:35
I'm assembling an RDS decoder, using a TDA7330B chip. Circuit I'm using is
right out of the data sheet. Today I powered it up with no input signal. I
expected to see a low on the QUAL pin, and a low on the RDCL and RDDATA
lines. Instead I saw a clock signal on RDCL, and what looks like random data
on the scope on RDDATA and QUAL.

Anyone with any experience with this chip? Are those signals typical for
no input signal?
--
Lee K. Gleason N5ZMR
Control-G Consultants
lee.gleason(a)comcast.net


From: seb on 28 Jun 2010 07:01
Il 28/06/2010 0.35, Lee K. Gleason ha scritto:
> I'm assembling an RDS decoder, using a TDA7330B chip. Circuit I'm using is
> right out of the data sheet. Today I powered it up with no input signal. I
> expected to see a low on the QUAL pin, and a low on the RDCL and RDDATA
> lines. Instead I saw a clock signal on RDCL, and what looks like random data
> on the scope on RDDATA and QUAL.
>
> Anyone with any experience with this chip? Are those signals typical for
> no input signal?

I have found some issues with this chip, I changed with TDA7333.

Bye

--
Seb
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