Was the solution something as simple as using 5 wires rather than a 5 core cable? Anand ----- Original Message ----- From: "Brent Brown" To: Sent: Monday, February 09, 2004 11:41 AM Subject: Re: [PIC]: PIC programmer puzzle > > > 4) Signal line ringing issues due to improper line termination? > > > Perhaps 270 ohm series resistors instead of 2000 ohm resistors? > > > > I don't want to go much below 2Kohm for other reasons, but you're > > getting close. > > Wild guess(s). You shifted the 2k series resistors to the other end of the > cable and it started working? That way you get full drive to overcome cable > capacitance but retain the current limit ability you desire. > > Or maybe a 1k at each end of the cable. Same reason as above. > > But from what you have said about observed signal shape on the scope I > doubt I'm on the right track. > > Brent. > > > > -- > Brent Brown, Electronic Design Solutions > 16 English Street, Hamilton, New Zealand > Ph/fax: +64 7 849 0069 > Mobile/txt: 025 334 069 > eMail: brent.brown@clear.net.nz > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body