Re: [Emc-users] Allowable length of db25 interconnect cabling --> ribbon cable

2016-12-25 Thread Chris Albertson
Comments re. below 1) "Everyone" already puts grounds between every signal in ribbon cable. All the limits you read are already assuming you have done that. So still about 30 inches max. >> Differential signal is the best but I do not how big difference will be >> against >> ground in one of

Re: [Emc-users] Allowable length of db25 interconnect cabling --> ribbon cable

2016-12-25 Thread Gene Heskett
On Sunday 25 December 2016 06:04:51 Nicklas Karlsson wrote: > > > ... > > > > You are right, ribbon cables are not very good at carrying signals > > over long cables. They will pick up too much noise if not shielded > > and suffer often from significant cross-talk if too long. > > A trick is to pu

Re: [Emc-users] Allowable length of db25 interconnect cabling --> ribbon cable

2016-12-25 Thread Nicklas Karlsson
> > ... > > You are right, ribbon cables are not very good at carrying signals over > long cables. They will pick up too much noise if not shielded and suffer > often from significant cross-talk if too long. A trick is to put ground in half of them, either odd or even. Then of course they get tw