On Wed, Jun 18, 2008 at 8:44 PM, Sean Breheny wrote: > Hi all, > > I'm working on a DDS (Direct Digital Synthesizer) and although it > works great, I'm having trouble keeping leakage from the several > digital clocks in the circuit from getting into the output. I've done > some tests which seem to indicate that even a 1cm piece of wire inside > the (shielded) container will pick up enough leakage to be a problem > (this is going to be the LO for a receiver). In other words, the > problem doesn't seem to be conducted leakage through the circuit but > rather simple coupling to the tiny bit of wire at the end of the > shielded output cable as it connects to the PCB). So, can anyone tell > me what the usual practice is when you have a shielded can with > several RF signals present inside and you want to get *one* of them > out without the others leaking in? > > Thanks, > > Sean What frequency? Can you use controlled-impedance connectors and cabling? Like those edge-mount SMA jacks. Regards, Mark markrages@gmail -- Mark Rages, Engineer Midwest Telecine LLC markrages@midwesttelecine.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist