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ba1404 clock signal

G

gula

Jan 1, 1970
0
Hi guys.
I build a FM transmitter based on the ba1404 chip.
The problem arises because this chip need a 38Khz crystal for produce
a subcarrier signal for the stereo transmition, but that crystal is
hard to find. To solve it i programed a PIC16f84 to generate the 38
Khz signal and, depending of what crystal use for the PIC, i could
reproduce the 38Khz fecuency more or less exactly. (For example wuth a
PIC runing on a 4MHZ crystal a can generate a 38,4 Khz signal).
What accurate such signal have to do?

Thanks, and scuse my english.
Cheers.

Gula
 
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