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Start voltage, mid-point voltage and maximum voltage can be used to quickly
and effectively set your locomotive’s throttle response curve to simulate the
prototype.
j) Loadable Speed table: CV67-CV94
In order to use the speed table, you need to change the setting of CV29, to add 16
to the value of CV29 to enable the speed table function.
If you wish to be more precise in setting your throttle response curve, loadable
speed tables let you define each individual speed step for a locomotive. Once you
have defined the speed curve you like, you can use the forward and reverse
multiplier to move the curve up or down in speed.
Setting up a loadable speed table involves setting many CV’s since you will set a
value for each of 28 speed steps. Many DCC users find that using a computer based
programmer makes this process much easier. When you use a computer, you can
even save the speed tables you like and load them into other decoders quickly and
easily via the computer.
There are a lot of topic about it and a lot of fans share their settings via website, you
can search it via google to discuss with them.
You can learn more about it at the following link:
http://tonystrains.com/dccprimer-intro-faq-how-can-i-customize-each-locos-
performance/
http://dcc-mueller.de/decoder/speedt_e.htm
https://www.youtube.com/watch?v=ZSy22RR66oY
k) CV3，CV4 Acceleration & Deceleration Rates
Acceleration is the rate at which the decoder increases speed from one speed step
to the next in response to a new increase speed command. The acceleration rate
(CV3) can be set to simulate train weight. Deceleration is the rate at which the
decoder decreases speed from one speed step to the next in response to a new
decrease speed command. The deceleration rate (CV4) can be used to simulate
inertia. Just like the prototype, you can set your locomotives to get off to a slow start
because of a heavy load and to take a long time to come to a stop because of the
inertia of the train once it is moving.
l) BEMF
Back-EMF is self-adjusting and can be either on or off. Set CV61 to 1 (default) for
on, 0 for off.
If you want Back-EMF to turn off after the locomotive is underway (for example, if
consisted locos fight each other, this will make consisting smoother) set CV10 to the
speed step at which you want it to turn off.