Resistor tip on "DCC Onboard" decoders works..what does this cv mean?

[Anonymous]

Thanks to you both.

What a process! Imagine needing that calculation and the maker not putting any reference on their manual about how to go about it.

That link to Tony's trains is really helpful.

[CSX Robert]

... I've never used such an old decoder that doesn't program up to 4 digit addresses automatically...

None of the decoders program a 4 digit address automatically, that is done by the command station; however, since these decoders are giving you trouble programming anyway, it is possible that when your Zephyr tries to program the three values(CV17, CV18 and CV29) to set the 4 digit address, not all of the values are getting programmed. I would first try programming the 4 digit address 2 or 3 times in a row to see if it takes, and if not then use then calculator that David linked to to caculate CV 17 and CV 18 and program them manually.

[Anonymous]

Thanks to jxtrxx...yes the 1000 Ohm resistor did the trick immediately on programming those cheapo Bachmann DCC Onboard decoders....just as you said..it may take a few attempts before the values "stick".

Yes, to tstage....they are made by Lenz 

But I made a separate post here to ask this quesiton.  I've never used such an old decoder that doesn't program up to 4 digit addresses automatically.  What does this mean?

Is it that for CV 17 I enter the first 3 digits of the 4 digit address, and for CV 18 the last of the 4?

I have already set CV 29 bits so that CV 17 and 18 are functioning.