SoundTraxx Tsunami Steam Technical Reference - Manual (Page 53)

Tsunami Technical Reference Page 51
CV 66
Forward Trim
Description
Contains a value, n, between 0 and 255 that specifies a scaling factor
interpreted as n/128 by which the forward drive voltage is multiplied.
D0-D7: Forward Trim Scalar
The forward trim scalar allows the decoder’s overall throttle response in the
forward direction to be adjusted up or down for the purpose of matching one
locomotive’s speed curve to another. See graph below.
A trim value of 128 (0x80) yields a scaling factor of 1.0 which will have no net
effect on the speed response.
Trim values between 129 and 255 (0x81-0xFF) have the effect of increasing
the motor voltage by a factor ranging between 1.01 to 1.99.
Trim values between 1 and 127 (0x01-0x7F) will decrease the motor voltage
by a factor between 0.008 and 0.99.
A trim value of 0 disables the trim scalar computation.
This CV is used only when speed tables are enabled (CV 29, Bit 4 = 1).
Otherwise, this CV will have no effect.
Default Value: 128
Related CVs: See also Reverse Trim CV 95, CV 29, CV 25.
Bit 7 Bit 0
D7 D6 D5 D4 D3 D2 D1 D0
Speed Table CVs