SoundTraxx DSD-150/DSX Technical Reference - Manual (Page 40)

Address Mode Direct Mode
Register Mode Ops Mode Short Form
Paged Mode Ops Mode Long Form
40 Digital Sound Decoder Technical Reference
CV 54
AUTO EXHAUST
SYNC RATE
Description
This CV contains a value n between 0 and 255 that specifies the chuff synchronization rate as a
proportion of the throttle for Auto-Exhaust operation.
bit 7 bit 0
CAM AE6 AE5 AE4 AE3 AE2 AE1 AE0
Bits 0-7: AE7:AE0, Auto Exhaust/Cutoff Control Rate
For Auto-Exhaust synchronization, the chuff rate will be generated in proportion the throttle set-
ting. To select Auto-Exhaust mode, the CV is loaded with any value between 0 and 255 (0xFF).
Higher values will yield higher chuff rates for a given throttle setting. A value of 0 will disable the
exhaust sound.
The correct synchronization rate may be computed as:
CV Value = 115.9 X ———
Where SPD is the locomotive’s speed in scale miles-per-hour at maximum throttle and DIA is the
locomotive’s driver wheel diameter in scale inches. For geared engines, the CV value should also
be multiplied by the locomotive's gear ratio.
When using cam synchronization, this CV will control the exhaust cutoff rate. To get optimal
performance over the entire throttle range, the CV value should be calculated using the formula
above.
Default Value: 94 (0x5E)
Related CVs: See also Foreground Sound Configuration.
❐ ■
❐ ❐
■ ■
SPD
DIA