Cross-talk square-wave?

[Al Kossow]

On 3/29/17 2:14 PM, David Bridgham via cctalk wrote:
> And I think this picture is the smoking gun.
> 
> http://pdp10.froghouse.org/qsic/pic_24_2.gif
> 
> Again, the bottom trace is the CS signal in question and the upper trace
> is now one of the QBUS DAL lines (after the bus transceiver and level
> converter) that's running across the ribbon cable near the CS signal. 
> It does appear that induction can make a fairly clean square wave.
> 
> 

simple thing to try is split the ribbon cable between the two signals