[Gb-ccb] forwarded message from Martin Shepherd

[John Ford]

Martin Shepherd writes:
 > 
 > 
 > On Wed, 20 Aug 2003, John Ford wrote:
 > > Martin, don't forget about the RFI filters that will be in the line.
 > > they will change your numbers somewhat.
 > 
 > Oh. I was assuming that the use of opto-isolators would make RFI
 > filters unnecessary?

No, they are still necessary to filter the lines out of the box.
*every* line in and out of the box must be filtered.

John

 > 
 > Martin