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*Note- The Bell [F1] Dynamic Brake [F6] and 

Rail-Wheel Clack [F10] can not be played 

simultaneously-the Bell sound will interrupt the 

other two sounds.
*Note- Because this locomotive has a dual 

function sound decoder on-board, it does not 

support CV read back features.

This decoder supports all program methods 

including: register mode, paged mode, CV pro-

gramming mode, direct mode, and program-

ming on the mainv [OPS mode programming]. 

Program the locomotive the same way you 

would program any other NMRA compatible 

decoder with your DCC system.

Out Of The Box DCC Running

The first time you run your new SD45-2 loco-

motive there are a few steps you should take 

to make sure the locomotive operates properly:

Test the locomotive in it’s analog mode 

[D.C.] if possible. If it runs properly [lights, 

sound, forward and reverse] on D.C., it will 

run trouble free on DCC.

The locomotive comes with a factory de-

fault DCC address of #3. Before program-

ming a new address into the locomotive, 

test run it on your DCC system on address 

#3. This will also insure there are no prob-

lems with the locomotive.

Test all functions [lights and sound] on 

default address of #3. Use the supplied 

Function Chart.

To avoid a current overload on your DCC 

system when starting it up with a lot of sound 

equipped locomotives on your layout, your new 

Athearn Genesis SD45-2 locomotive does not 

automatically start up in the DCC mode. To 

start the locomotive, in Run Mode, enter the 

address you have assigned for the locomotive, 

then press any function button [F1-F9] two 

times (do not press F0 2 times or you will shut 

off the sound). You will then hear the locomotive 

go through it’s start up procedure [there will be 

no movement or operating functions for a few 

seconds until the locomotive’s idle steadies 

out]. Once your locomotive finishes it’s start up, 

it is ready to go to work on your layout.

When you are finished running your locomotive, 

pressing function button 8 [F8] four times will 

shut your locomotive down. When the locomo-

tive is shut down this way, it will not automati-

cally start up next time you need it. You will 

have to press any function button 2 times to 

re-start it.
Once these steps have been completed, fol-

low the included CV chart to program any new 

programming features you want into the loco-

motive. When you initially program your new 

SD45-2 locomotive, this step should be done 

on a program track for best results. You must 

know how to properly use your DCC systems 

programming mode to program any decoder. If 

you are unsure of programming a decoder with 

your system, please consult your DCC systems 

instruction book regarding programming or 

contact the manufacturer of your DCC system 

for proper guidance.

1.

2.

3.

FACTORY

VALUE

RANGE

CV

REGISTER

Short address

R1

1-127

3

CV1

Start voltage

R2

0-32

0

CV2

Acceleration

R3

0-32

0

CV3

Deceleration

R4

0-32

0

CV4

Top voltage

-

0-32

32

CV5

Speed curve select (0=linear, 1=slow

increase at slow speed, 2=fast increase

at slow speed)

CV6

Basic configuration

R5

R6

-

-

-

Page number

-

-

-

2

CV29

Manufacturer Version #

R7

-

32

CV7

Manufacturer I.D.

R8

-

143

CV8

Long address upper byte

-

192-231

192

CV17

Long address lower byte

-

0-255

3

CV18

Advance consist address

-

-

-
-
-

0-127

-

0

CV19

When CV-21=0, all accessory functions will follow

its own address. When CV-21=1, all functions

will follow the consist address

0

CV21

Horn type

0-14

4

CV50

Sound on/off (0=off)

0-1

1

CV49

Horn volume

0-3

3

CV51

Bell type

-
-
-

0-6

3

CV52

Bell volume

0-7

3

CV53

Bell ring rate

0-50

3

CV54

Diesel rumble volume

-

0-3

3

CV55

Brake squeal volume

-
-
-
-
-
-
-
-
-

0-3

3

CV56

Dynamic brake volume

0-3

3

CV57

Air release volume

0-3

3

CV58

Air pump volume

0-3

3

CV59

Safety pop valve volume

0-3

3

CV60

Engine cooling fan volume

0-3

3

CV61

Coupling volume

0-3

3

CV62

Random noise volume

0-3

3

CV63

Rail wheel clack

0-3

3

CV64

User identification number

-

0-255

0

CV105

User identification number

-
-
-
-
-
-
-

0-255

0

CV106

Light effects

see chart

0

CV112

Coupling fire volume

0-3

3

CV113

Brake release volume

see chart

0

CV114

Auto brake squeal enable/disable

0-1

1 (enable)

CV115

Coupling sound type

0-2 (0 is off)

1

CV116

Random sound enable

0-1

1 (enable)

CV118

-

Ditch light flash rate

0-10

3

CV120

Diesel sound type (0=off, 1=rpm & notch synchro

to speed, 2=linear rpm synchro to speed, 3=notch

up/down) ( F8=notch down, F9=notch up)

-

0-3

1

CV122

Factory default setting: Programming to 1 will

restore all CV’s to default setting

-

-

0

CV125

DESCRIPTION

Programming for DCC Operation – Digital Mode

This decoder supports all program methods including register mode, paged mode, CV programming, direct mode 

and programming on the main (OPS mode programming). Program the locomotive the same way you would pro-

gram any other NMRA compatible decoder with your DCC system. 

Note:  Due to the nature of dual function decoders, it does not support the CV read back feature. 

The Dual-Function decoder is manufactured by Model Rectifier Corporation for Athearn Trains.

  

1550 Glenn Curtiss Street

Carson, CA 90746

www.athearn.com

©2006 Horizon Hobby, Inc., Champaign, IL.

G101   04/14/06

GENESIS SD45-2

 WITH DC/DCC

SOUND SYSTEM

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