RS 232 Isolation from Scanner to Computer

[radiowaves]

Wondering if anyone uses some type of isolation from their scanner to their computer for the RS232 link? For like static, ect... I know they recommend it on the audio side to the computer, so as not to zap your sound card.

Is it needed?

Thanks,
Chad
N0YK

 

[rdale]

Not needed in either case.

 

[radiowaves]

Why is it not needed on the audio side? Most sound cards have some type of protection?