Hi there,
I am using an RS485 interface over a 15 metre screened twisted pair cable.
I'm looking for a data rate of up to 10 Mbps. So far, so good: RS485 is specified at 10 Mbps
But I'm intending to send a clock alongside the data which will need to run at 10 MHz.
My reckoning is that a10 MHz clock has transitions every 50 ns, but 10 Mbps data has transitions every 100 ns.
So a 10 MHz clock "looks like" 20 Mbps data, and is outside the nominal operation window of RS485.
Can you please confirm (or deny) my reasoning: if I'm right I will have to design an alternative clocking (or data) scheme.
Many thanks,
Michael
