There are two parameters
that control the operation of Dither in TCS Decoders.
Program the frequency of the additional pulse by putting a
value in CV56. A value of 1 will give the highest frequency
of additional pulses per second. We
recommend starting with a value of 3 in CV56 which is
the factory default. Values of 1 thru 255 are valid.
Most locomotives will work best with a value of 3 in CV56.
Typical values are between 1 and 10.
CV57 controls the amplitude
of Dither pulses. We recommend starting with a value of
25 in CV57. Then adjust CV57 up or down 5 at a time and test
operation until you you find the value that works best for
your loco. Valid values are from 1 to 255. (1 being the
lowest amplitude pulse and 255 being the highest.)
Most locomotives being manufactured today will work very
nicely with a value between 15 and 35 in CV57.
There are some older locomotive models that could benefit from
a higher value of Dither amplitude in CV57. For some
older locomotives that are particularly sticky a value of 75
to 90 might be necessary to help smooth the slow speed
response.
When CV57
has a value of
0, Dither is disabled.
When CV57 has a
value greater then zero it is active. It is active
through the whole speed range and in all speed step
modes (14,28,128). It is active with user loadable speed
table, Vstart, Vmid, Vhigh.
Try experimenting with Dither to achieve better
low-speed operation. The effect will narrow the window
between what point the locomotive starts to move and at what
point it will stay running.
