Hi Dale:
Is it as simple as changing the clock to operate at 60 kHz?
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
Dale J. Robertson wrote:
While looking for other stuff I came across the data sheet for the NXP Semi
SAA6579.
The chip is a purpose built demodulator for RDS (which utilises a 57 KHz ABPSK subcarrier on FM broadcast that is)
used for traffic, song info etc. This chip has an anti-aliasing front end low pass filter and an 8th order bandpass
filter followed by a costas loop and provides a phase synchronous regenerated carrier. What's interesting is that the
switched cap bandpass filter and the synchronous detector are both driven by clocks derived from a local crystal
oscillator which is spec'd at 4.332 or 8.664 MHz (76 or 152 X carrier chosen by a mode select pin) I'm thinking it
should be possible to use a 4.56 or 9.12 MHz crystal or external clock to use this chip as-is on 60 KHz.
Have a look at the data sheet and tell me why I'm full of it.
Jameco is closing out these chips in DIP-16 at a nickel apiece, $3.00/hundred.
Dale NV8U
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
