SoundTraxx DSD-150/DSX Technical Reference - Manual (Page 46)

Address Mode Direct Mode
Register Mode Ops Mode Short Form
Paged Mode Ops Mode Long Form
46 Digital Sound Decoder Technical Reference
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CV 95
REVERSE TRIM
Description
Contains a value, n, between 0 and 255 that specifies a scaling factor interpreted as
N/128 by which the reverse drive voltage is multiplied.
bit 7 bit 0
D7 D6 D5 D4 D3 D2 D1 D0
D0-D7: Reverse Trim Scalar
The reverse trim scalar allows the decoder’s overall throttle response in the reverse direction to
be adjusted up or down for the purpose of matching one locomotive’s speed curve to another.
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 (0x80)
Related CVs: See also Forward Trim, CV 29.