Originally Posted by Dan Pierce
Some CV's are a standard via the NMRA. However, most are not and cv 50 is used differently in many engines.
I repeat change CV 50 to 2 to turn off MFX as the decoder looks for MFX first, DCC second and DC third. Also some pulsed power units make the decoder think it is DCC but the decoder gets 'lost' when it can not sync with digital pulses hence no analog can be found.
Also make sure your system and the decoder are set to the same speed steps.
Dan - These are very helpful points about Marklin's mfx technology. I have two engines, their LGB RhB 50th Anniversary and the LGB Heidi Steamer, that I've used on my DCC layouts, and I've not tried using them in Analog/DC power. But to play it safe, I'm going to use CV50 to turn off the mfx.
Some of these Marklin/LGB locos with mfx, also are shipped by the factory with the Analog sound turned off. After turning off the mfx features on the decoder, what CV setting does someone use to then activate the Analog sound? Some hobbyists have had problems activating the Analog sound and have been told you can only do it using a Marklin CS3?