Brand new decoders, purchased in UK and carried home to Michigan.  Installed in two new loco's this week, on new track.  Both run, but stop at random points on the layout, and sit with no control for 90seconds (always this period) then set off again at the same speed.  Lights are still on during this period, so still powered up.  I have two of them, different loco's displaying the same problem.  Not returnable as the store is 3000miles away...  Can you help?

My first foray into DCC, and it's not going well.  Hoping and praying somebody can help.

I've got a new Bachmann EZ Command, running a new DZ125 on a Graham Farish (the UK Bachmann) Diesel loco.  I've connected it all up, assigned to address 1 and it works, but the speed steps are terrible.  Smooth while in a certain speed step, but big jumps in between.

Digitrax and Bachmann both advertise that the devices are good for 128, but my feeling is that it's 28 at best.  How do I get smooth acceleration from this set up?