Digitrax SoundFX SFX0416 User manual

SFX0416
SoundFXTM Decoder
Preloaded with selectable
Steam and Diesel Sound
Schemes
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Fe ea at tu ur re es s: :
nDigitrax SoundFXTM Sound System-Your locomotives will sound like the
real thing with SoundFX
Customizable 8 Bit Sound
3 simultaneous voices
Downloadable Sound with Digitrax PR2 and SoundLoader software
16 Megabit Sound Memory
Playable F2/Whistle option with DT400 Throttle
1 Watt Sound Output
Cam input-synchronized steam-chuff option for steam locos
nSmart Power Management-no more booster or programmer shutdowns! No
extra equipment needed to program or run
nDigitrax FX3Functions-Control lights and functions
nProgram using any Digitrax Compatible Control system without having
to buy any extra equipment
nDirect mode programming
nOperations Mode Programming
nDCC Compatible
©2007 Digitrax, Inc www.digitrax.com 1
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HO and N Scale
SFX0416: Wired Function Decoder
with SoundFXTM
4 Function FX3200ma outputs
Includes 28mm 8 Ohm Speaker &
330uF Capacitor

©2007 Digitrax, Inc www.digitrax.com 2
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Pa ar rt ts sL Li is st t
1 SFX0416 Function Decoder with Sound FXTM 1 Instruction sheet
1 Wireset with 28mm 8 Ohm speaker and 330 uF capacitor/clip
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For additional resources see Digitrax Decoder Manuals for test procedures,
installation instructions, programming and other technical information. Digitrax
manuals and instructions are updated periodically. Please visit
www.digitrax.com for the latest versions, technical updates and additional loco-
motive-specific installation instructions.
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1) Connect the Red and Black track wires from the 7 connector Track and
Function leads to the locomotive track power connections.
2) Connect the function leads that are to be used from the 7 conductor Track
and Function wire set. Note that to be able to readback Sound FX CV’s a
combination of function lead loads of at least 60mA at 12volts should be
connected to these function leads. Insulate the unused function leads so
they cannot short to the locomotive frame or track power
3) Mount the 28mm speaker attached to the 5 conductor sound feature wire set
in an appropriate sound enclosure. Be sure to inspect the speaker diaphram
for magnetic debris or damage, which will affect sound quality. Other
speakers may be subsitituted in combinations as long as the total impedance
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SFX0416: 7 lead Track and
Function connections
SFX0416 with Speaker and 330uF Capacitor
For most reliable operation
Digitrax recommends soldering
the SFX0416 connections
Figure 1: SFX0416 Decoder
5 lead Speaker/capaci-
tor connectors plus
cam input

©2007 Digitrax, Inc www.digitrax.com 3
on the Orange/Gray wires of the 5 conductor sound wire set is 8 ohms or
greater.
4) Mount the 330uF/25V electrolytic energy storage capacitor from the 5 con-
ductor sound wire set. Be sure not to short the capacitor case or leads to the
track leads or locomotive frame or damage to the decoder may result.
5) For Steam units with a synchronization cam capability, connect the White
CAM lead of the 5 conductor sound wire set to the cam output connection.
6) Inspect the installation before testing the sounds and replacing the shell.
7) Connect DCC track power from a compatible DCC system and select the
factory default address 03 to enable sounds for testing
8) Be sure F8 is OFF, and then press F1(bell) or F2 (whistle/horn) ON to hear
these associated sounds.
9) Customize sounds by programming Sound CV’s to adjust the desired con-
figurations, as shown in the following tables of Sound FX CVs. Sound
schemes other than the default Steam (CV60=0) or Diesel (CV60=1)
schemes may be loaded by using a Digitrax PR2 Sound FX Programmer.
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The sound project loaded into this decoder may be operated independently of
any other DCC motor or function decoder. If another non-Sound FX com-
patible DCC decoder is connected to the track leads then CV readback of
SFX0416 Sound CV’s and PR2 SoundTest modes may not be possible.
Note that it is always possible to Write CV values using Operations mode or
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SFX0416 installation in
Athearn F7 Diesel with pre-
existing DH163 Decoder
Speaker Installed Inside
Loco shell with (prefered
method) or without baffle.
Figure 2: SFX0416 Placement
Capacitor can be
installed anywhere
space permits.

©2007 Digitrax, Inc www.digitrax.com 4
a Service Mode programming track, even if CV Read is inoperative.
If the connected function loads are insufficient for CV readback with a PR2 or
an incompatible DCC decoder is also connected, it is still possible to down-
load a complete sound project by using the large green “program project”
icon. in the SoundLoader program.
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The sound performance of any attached speaker(s) is greatly affected by the
mounting system and required baffle or rear enclosure.
The baffle is used to isolate to speaker diaphragm front sound waves from the
out of phase rear sound waves. This minimises sound cancellation, particularly
at lower frequencies. For most efficient sound generation, the volume of the
baffle should be as large as practically possible, and the baffle walls should be
acoustically rigid so not to allow acoustic interference.
Practical baffle materials are plastic, cardboard and even sheetmetal. Common
items such as cardboard tubes or 35mm film canisters may be modified and
trimmed to create reasonable baffles. Commercial baffles are also available in
many sizes to match many types of speakers, such as a “TDS Enclosure 1.10”
diameter” from Tony’s Train Exchange [1-800-978-3472] unit that will match
the 28mm factory speaker of the SFX0416
Most HO or O scale or similar locomotives have limited internal volume within
the shell, so the choice of speaker mounting requires some ingenuity for good
sound performance and volume. An example of a commercial molded baffle in
a ready-to-run locomotive is the Kato HO F40-PH, where the 28mm speaker
clips into an enclosure at the upper rear of the locomotive shell.
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©2007 Digitrax, Inc www.digitrax.com 5
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Your Digitrax SFX0416 Sound FX decoder is ready to run and will operate and
generate sound using address 03 with no additional programming. On your
Digitrax system, simply select the locomotive’s address and the sound will
start. On some DCC systems, it is necessary to select the locomotive address
AND send a command to start the sounds.
When used in conjunction with a separate DCC motor decoder in a single loco-
motive it is most practical to program both decoders to the same address and
operating modes.
For a more prototypical railroading experience, your decoder can be cus-
tomized for your specific locomotive by programming some of the
Configuration Variables, or CVs, available. Digitrax Sound decoders can be
programmed using either the direct method on a programming track or with the
operations mode using the main line. See the Digitrax Decoder Manual or the
Digitrax web site for more information.
Intial Test and Programming: This decoder is preprogrammed and tested
with a Steam locomotive sound scheme, and is ready to operate on factory
default address 03. Before customizing the decoder it is useful to run it on
the factory default address 03 to check the installation. The following sec-
tions show how to change the locomotive address and customize the
decoder
For more information on decoder installation and programming techniques and
examples visit the www.digitrax.com
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Ch ha an ng gi in ng gt th he eD De ec co od de er rA Ad dd dr re es ss s
The first CV most people change is the decoders address. This lets you inde-
pendently control each loco with its own unique address. Digitrax decoders are
shipped with CV01 (AD2), the two digit address, set to 03. Following is a brief
description of how to change the decoder address with a Digitrax DT series
throttle. See your Starter Set Manual for complete programming instructions.
1. Place the loco on the programming track or on the main line.
2. Enter the programming mode using your DCC system/throttle. On DT400
press PROG until you see “Pd” if using a programming track or “Po” if
using the main line.
3. Use your throttle to choose the address you want to set up for the decoder.
On the DT400 use the left knob to dial AD2 for two digit programming, use
the right knob to dial up the address, click the right knob to change to AD4
for programming 4 digit addresses.
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