FAQ:What older NCE decoders are not fully DCC compliant?
DCCWiki, a community DCC encyclopedia.
| See more FAQs | |
|---|---|
| General information | |
| DCC Categories | Decoder |
| Related Articles: | |
| Manufacturers | |
With an update to the NMRA DCC Specifications, older NCE decoders which were compliant are no longer. The issue arises when RailCom is active on the Command Station.
When RailCom is enabled, older NCE decoders may operate erratically or with unexpected results. Disable RailCom to prevent these issues should they arise.
The NCE Power Pro system generates 12 bits for the preamble, not the minimum 14 required by the DCC standard. Early multifunction decoders made by NCE expected 12 preamble bits.
- Command stations made with RailCom on board cause the issue. Not all manufacturers1 support RailCom. Most older systems lack RailCom capability. See your manuals to learn if your system has RailCom, and how to disable it.
(1) RailCom is often found on European DCC brands, such as Lenz and ESU.