Posted on September 27, 2005 at 13:20Hi everybody,
I'm working with ST7538. I'm transmit between neutral fase and ground line to avoid problem in trifase system with 132,5 Khz frequency and 2400 baud. In some site I have problem of noise and the CD/PD line toggle. This problem occure some hours a day. By your esperience should I change some parameters as frequency or baud rate to improve the comunication ?
I'm use a preamble byte every transmission to syncronize the comunication but during noise doesn't work correct.
1) Have you suggest me a way to avoid noise by software ?
2) What is the best configuration of register to avoid noise and have best performance ?
another problem I have is a noise on clock CLR/T. In some device it's a stable but in other the clock swing. The hardware and components are the same. If I disconnect the transformer from line the clock became stable.
3) Have you suggest something ?
I have best performance with transformer 2:1.
Thanks to everybody help me....
