Digitrax SoundFX SDH187MT Manual - Página 5

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Sound Control Functions: The following table shows how each de-

coder function controls sounds for the factory sound project.

Function#

Function Controls

Lights

Bell

Horn/Whistle

Coupler crash

Air feature disable

Diesel = Dynamic brake

Fans Steam = Water

Pump turbine

Diesel = Notch Up

Steam = Blow-down

Crossing Gate Air horn or;

Diesel = Notch DOWN

Steam = Wheel slip

Mute Control

Brake squeal

Crossing Gate

F10

Air horn Sequence

F11

Steam = Greaser

F12

Steam = Safety Blow-off

Configuration CV setup: The following tables show the CVs used in

this decoder sound project and how it is set up at the factory to operate

various sounds using your throttle. SFXv3 CV assignments are generally

consistent with earlier Digitrax decoders.

Motor Drive Frequency: CV9:

KHz, range 4 to 50KHz for CV values 01-50. 00 sets a supersonic 16KHz

default.

Motor Back EMF (BEMF) Trim: CV10: Value 64 and up to 127

slows down step1 BEMF motor speed. 00 default also sets this to 64.

Motor Control: CV55/CV56/CV57:

CV56 controls dynamic gain, CV57 sets BEMF Intensity. This is same as

prior Digitrax decoders.

Master Volume: CV58:

volume, and CV140 to CV145 trim volumes for specific sound types. If

you download a new .wav sound file for any of the sounds in the schemes,

be careful to set a volume level that does not overdrive the speakers,

which may cause distortion or damage.

Notes

F0 controls directional white/yellow wires

CV146 controls rate, CV157 selects bell type

CV150 selects horn choices

Auto coupler/brake set by CV151 max speed

F4 OFF enables pop-off,

drier and starts compressor/air pump

Notch UP if CV155=01 or

Notch DOWN, if CV155 = 01 or 02

(Crossing Gate active if in Diesel mode and

CV155=0)

F8 ON is mute

CV9 value sets motor frequency in

CV55 sets BEMF static gain,

The value in CV58 sets the master sound

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