MTHTrains HO SD70AH Diesel Engine Quick start guide

M.T.H. HO SD70ACe
Diesel Engine
Congratulations! You've just purchased
the most feature-rich and technically
advanced HO diesel locomotive ever
produced! This highly detailed model
includes a broader range of features than
you’ll find on any other HO scale diesel,
including smooth performance from a
three-scale-mile-per-hour crawl to full
throttle; “cruise control” for steady
speeds regardless of curves, switches and
grades; built-in decoders for DCC and the
M.T.H. Digital Command System (DCS);
and a full range of prototypical sounds.
If you’re looking for motive power that’s
accurately detailed, smooth running,
and a great deal of fun to operate,
it doesn’t get any better than this.
Operates on 18” radius curves with Code
70, Code 83 or Code 100 rails.
PLEASE READ THE MANUAL
BEFORE USE AND SAVE
WWW.MTHHOTRAINS.COM
(PS3)
Engineer’s Guide
PFA
Passenger/Freight
Announcements

This product may be protected by one or more of the following patents:
6,019,289; 6,280,278; 6,281,606; 6,291,263; 6,457,681; 6,491,263; 6,604,641;
6,619,594; 6,624,537; 6,655,640.
©2019, M.T.H. Electric Trains®, Columbia, MD 21046
CAUTION: ELECTRICALLY OPERATED PRODUCT:
Recommended for Ages 14 and up. Not recommended for children under 14
years of age without adult supervision. As with all electric products, precautions
should be observed during handling and use to prevent electric shock.
WARNING: When using electrical products, basic safety precautions should be
observed, including the following:
● Read this manual thoroughly before using this device.
● M.T.H. recommends that all users and persons supervising use examine the
hobby transformer and other electronic equipment periodically for conditions that
may result in the risk of fire, electric shock, or injury to persons, such as damage to
the primary cord, plug blades, housing, output jacks or other parts. In the event
such conditions exist, the train set should not be used until properly repaired.
● Do not operate your layout unattended. Obstructed accessories or stalled trains
may overheat, resulting in damage to your layout.
● This train set is intended for indoor use. Do not use if water is present. Serious
injury or fatality may result.
● Do not operate the hobby transformer with damaged cord, plug, switches,
buttons or case.
TABLE OF CONTENTS
QUICK START GUIDE .......................................................3
UNPACKING YOUR ENGINE ...........................................4
Removing and Unwrapping Your Engine .....................4
What Else is in the Box? ...............................................4
PRODUCT OVERVIEW......................................................5
Getting to Know Your Engine .......................................5
ENGINE DIAGRAM............................................................7
SET-UP .................................................................................8
Snow Plow Installation..................................................8
Lubrication ....................................................................8
MODES OF OPERATION ...................................................9
FEATURES AND OPERATION ........................................10
Analog DC (standard DC power pack) .......................10
DCS Digital Command System...................................12
DCC DIGITAL COMMAND CONTROL .........................14
F-Function Table ........................................................19
Factory Reset 55-55-55 ...............................................22
Advanced DCC Operation ..........................................24
Configuration Variables...............................................24
Advanced Consisting...................................................29
Programming Track.....................................................33
SPECIFICATIONS .............................................................34
CARE AND MAINTENANCE ..........................................35
Troubleshooting Guide................................................35
HOW TO ORDER PARTS .................................................40
REPACKAGING YOUR ENGINE ....................................40
SERVICE & WARRANTY INFORMATION ...................41
Rev: _HO SD70ACe PS3 7/2/19

QUICK START GUIDE
Of course, you should read your manual over before running
your engine. But if you just can’t wait, choose which control
method that you use from the list below. Follow the steps
outlined in your section, run your engine and enjoy! Now,
after a few minutes, shut down the engine and read through
your engineer’s guide.
I USE A REGULAR DC SUPPLY
Step 1: Unpack your Engine (refer to unpacking instructions)
Step 2: Set the engine on the track
Step 3: Apply 6-8VDC voltage until she starts up and then
increase to pull out
I'M A DCC OPERATOR
Step 1: Unpack your Engine (refer to unpacking instructions)
Step 2: Set the engine on the track
Step 3: Power up your DCC system
Step 4: Select engine address 3 and press “F3” to start her up
Step 5: Turn the throttle and head on down the pike
I RUN DCS
Step 1: Unpack your Engine (refer to unpacking instructions)
Step 2: Set the engine on the track
Step 3: Power up your DCS system
Step 4: Add the engine to your system and start her up
Step 5: Turn the throttle and move out
CAUTION: M.T.H. HO engines DO NOT OPERATE ON AC
VOLTAGE. Applying AC power to your locomotive could
cause permanent damage and will void your warranty.
Please note, when making setting changes in DCS or DCC,
such as address, please wait a minimum of 5 seconds after
removing power to insure the settings are stored in the engines
memory. Reapplying power in less than 5 seconds may result
in losing the setting changes.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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UNPACKING YOUR ENGINE
Removing and Unwrapping Your Engine
Slide the plastic packaging sleeve off of the container.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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What Else is in the Box?
The following items are packed with your engine.
Engineer’s Guide
Snow Plow
Carefully remove blister (clamshell) on a soft surface.
By nature, models with high levels of detail have some
small fragile parts.
Carefully remove any foam packing pieces that may be
surrounding the model.
Gently place the model on its side and remove the 2 screws
that attach it to the packing base.
Screws

PRODUCT OVERVIEW
Getting to Know Your M.T.H. HO Locomotive
Key Features
Your new HO Diesel Engine is equipped with the exclusive
M.T.H. Proto-Sound® 3.0 digital sound and control system.
In plain English, this means your locomotive contains state-of-
the-art electronics providing realistic digital sounds, precisely
controlled speed in increments of 1 scale mile per hour,
and much more.
Compatibility
The Proto-Sound 3.0 system is universally compatible with
track power and/or signal combinations including analog DC
(regular DC power pack), DCC (NMRA Digital Command
Control), or DCS (MTH Digital Command System). Simply
set your Engine on the rails, apply any one of these
power/signal sources, and move out! The Proto-Sound 3.0
system automatically senses the track environment and adapts
accordingly. No hidden jumpers, switches, magic wands, or
programming required! A vast array of realistic operation is
automatic when the Engine is run on analog DC. You can
expand access to features in a DCC environment. Experience
the most your new locomotive has to offer in the simple to use
yet powerful world of DCS. To be clear, DCS is NOT a
proprietary version of DCC, as some other manufacturers
offer. DCS is a comprehensive layout control system
designed with one primary goal: make model trains do
amazingly realistic things using a simple and intuitive
controller. We put the complexity on the inside, and the
fun in your hands!
Digital Sound
Your Proto-Sound 3.0 (PS3) equipped engine contains over
100 individual recordings. These recordings are played back
dynamically at appropriate times to create a symphony of
realism for your ears. Hear the diesel roar automatically
intensify or lighten when speeding up or slowing down, listen
to the sounds of brakes squeaking and squealing as you come
to a stop, or enjoy the random conversations of railmen
working as your model sits at idle. It's all there and it's
incredible.
Your HO diesel includes built-in realistic horn sound effects,
including forward (two blasts) and reverse (three blasts)
signaling and crossing signal sounds, all available with one-
touch control from a DCS controller or through any DCC
controller capable of accessing up to F28.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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Digital Control
In standard analog DC mode, your model still operates under
digital control. The PS 3 advance speed control system
converts track voltage into digital speed commands. Your
model will run smoothly and consistently at any speed
regardless of load, hills, or curves. If you are a DCC user,
you'll quickly learn to appreciate the precision of our speed
control and linear speed curve. DCS users will enjoy the added
benefits of controlling speeds in increments of 1 scale mile per
hour displayed on DCS controllers or easily changing
acceleration and deceleration rates independently without any
discussion of bits or bytes. To be clear, DCS is NOT DCC.
Lights
As you read on, you’ll notice there are no instructions for
replacing light bulbs in your diesel. That's because there
aren’t any. We use specially designed and controlled LEDs to
create realistic lighting effects that occur automatically. Again,
NO PROGRAMMING! Just come to a stop and watch as the
headlight dims automatically in accordance with rule 17. Of
course, as you pull away, the headlight returns to it’s fully
bright, yet warm, glow.
More…
In analog DC operation, just flip the track polarity or direction
switch at any speed and watch your Engine gradually come to
stop, turn on the appropriate directional lighting, and smoothly
accelerate back up to speed. No other HO locomotive has
features like these. There are so many more things to learn and
enjoy about M.T.H. HO Engines, we could write a book. But,
that's no fun. So, if you haven't already done so, flip to the
Quick Start Guide and let's run your new engine!
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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ENGINE DIAGRAM
Locomotive
Control Hatch
Controls
Volume Pot
To remove the Control Hatch,
gently pull it outward and lift it off
from the side.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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GPS Receiver
Metal See-Through
Fan Vents
Detailed Horn
Detachable
Snow Plow
Crew Figures
Die-Cast Air Tanks
and Fuel Tank Safety Tread
on End Steps
All Wheels
Powered

Lubrication
Using light machine or household oil, apply a very small
amount to all axles points as shown.
Your gearbox is properly greased at the factory and probably
never needs service, however, if you run excessive hours
pulling heavy loads, it's a good idea to remove the gearbox
cover and re-grease using M.T.H. gear grease or equivalent.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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Mounting
Holes
Slide the Snow Plow Up Through
The Air Hoses And Press
The Tabs Into The Holes
Completed Snow Plow Installation
Lubricate Axles (L)Lubricate Axles (L)
SET-UP
Installing the Snow Plow

MODES OF OPERATION
There are 3 modes of operation with different levels of
features accessible in each. We refer to them as Analog DC,
DCS and DCC. Here’s a brief explanation of each mode.
Analog DC
This is when there is nothing connected to the rails except a
conventional DC power pack. These power packs generally
have at least one variable output controlled by a throttle of
some sort and a means of reversing DC polarity on the track to
change the direction of your engine.
DCS or Digital Control System
While the acronyms are close, this is about where the
similarities between DCS and DCC end. Yes, they are both
digital control systems, however, M.T.H. DCS is NOT DCC.
There are several proprietary versions of DCC on the market,
but this is NOT one of them. M.T.H.’s DCS system is proven
technology in the O and One gauge markets and now, we’ve
brought its power and simplicity it to you.
First, the power signal in DCS is NOT the command signal.
Next, DCS employs a fully functional bi-directional
communication scheme opening a vast range of advanced
features and yet, is so simple and intuitive, you can enjoy
them. No programming tracks, bits and bytes, or conversion of
binary to hexadecimal numbers! To add an engine in DCS, just
press “ADD ENGINE.” After that, If you want to start your
engine, just press “START UP” or, to turn the sound on or off,
just press “SOUND.” No combinations of letters or numbers
to remember. We think you’re really going to like this!
Please note, when making setting changes in DCS or DCC,
such as address, please wait a minimum of 5 Seconds after
removing power to ensure the settings are stored in the
engines memory. Reapplying power in less than 5 seconds
may result in losing the setting changes.
DCC or Digital Command Control
DCC is a popular digital command control scheme wherein
the track power is also a digital control signal. That is, using a
DCC controller, you can communicate with multiple engines
and have them all moving at different speeds or moving in
opposite directions on the same track at the same time. The
power/command signal remains constant and engines are
“commanded” to perform as desired. M.T.H. is new to DCC
but we recognize it’s importance to many HO operators. So,
we loaded our engine with more DCC features easily
accessible to the operator than any HO engine ever built
previously. You DCC guys are in for a real treat!
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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FEATURES AND OPERATION
Now, for the fun stuff! Your new M.T.H. HO Diesel Engine
has more features and operating capabilities than any HO
engine ever built by any manufacturer. We're going to walk
you through everything she does in general, but you'll
probably find a few we forgot to mention on your own.
Analog DC
Not much explanation is required here, and that's exactly why
you run your trains this way! Here's the good news, even if
you like to keep it simple, your MTH HO engine is packed
with cool sounds, lights, and operating features, that you're
going to love.
Running the Engine
Set the engine on the rails, and apply DC power. Refer to the
Set-Up section of this guide for instructions on how to
lubricate the chassis.
As you increase power, at about 6 volts, the lights and sounds
will come on. Keep going on up to about 8 and she'll move
out! About 16 volts DC is adequate for prototypical speeds
however, your engine can handle up to 24 volts DC if you feel
the need for speed!
Changing Direction
If you flip the direction (polarity) switch on your power pack
while the engine is moving, it will gradually slow to a stop,
and slowly accelerate back up to speed in the opposite
direction. This is an exclusive feature of MTH engines that
we're sure you'll enjoy. You can also change direction the old
fashioned way by reducing throttle until the engine stops, flip
the direction switch, and then increase throttle again. Either
way is OK, we just thought a graceful transition from any
speed would be cool.
If you switch track polarity too slowly, the engine may stop
abruptly and not move in the reverse direction. This is normal.
There is a feature we call “anti-jack rabbit” that prevents the
engine from taking off at high speeds when high voltage is
applied to the track instantly. Some direction switches have a
“dead” spot where the power is completely off during polarity
changes. This can invoke the anti-jack rabbit feature. The
solution is to flip the direction switch more quickly or disable
the feature in DCC. Don't worry you won't hurt the engine.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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Speed Control
Your engine is equipped with speed control. This feature is
always active, even in analog DC mode. Basically, your
engine constantly measures track voltage and converts this to a
digital speed command. You should notice the speed remains
constant up and down grades, around curves, and with varying
loads. This is no accident. You've got the most precise speed
control system available today.
Sounds
In this mode, sounds are pretty much automatic. If you’re
moving, you’ll hear diesel sounds.
When your sitting at idle, there may be some maintenance
done. You could hear someone calling for help on the radio.
Don’t worry, all of this and more is just a normal part of
everyday operations.
When you’re moving at a pretty good clip and you reduce the
throttle quickly, you may hear the brakes squeak and squeal as
the engineer applies them. Of course, they’ll stop when the
engine does.
If things get too noisy, just locate the sound volume pot
underneath the engine, adjust the volume from maximum
down to off, whatever suits you. Turn it counterclockwise to
reduce the volume or clockwise to increase it.
Lighting
Now, this is an illuminating section (we couldn’t resist). Your
model is equipped with a headlight, number board lights and
marker lights.
The first thing to know about the lighting is there aren’t any
bulbs. It’s all LEDs, so you should never have to replace them.
As with sounds, in analog DC mode, lighting operation is fully
automatic. They’re always on and behave appropriately.
The headlight functions under rule 17 and dims when stopped
for a time or while backing up. Of course, just as you begin to
move forward, it goes bright to show the way.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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DCS Digital Command System
As you may have gathered by now, DCS is an M.T.H.
exclusive Digital Command System that provides easy access
to dozens and dozens of features in our models. We developed
DCS to provide a powerful and advanced model train control
system that was simple and enjoyable to use. We've
accomplished that goal. DCS further expands the features
available far beyond that of DCC. After all, in DCC, we only
had a limited number of “F” commands to fill.
As with DCC, we'll leave the detailed “how-to” system
explanations to the DCS system manuals. What you should
know are all the cool features your engine has built-in, waiting
for you to experience.
Running the Engine
Once the DCS system is connected to your track and powered
up by a DC Power Supply (even though DCS can be
controlled by AC and DC power supplies, your M.T.H. HO
locomotive will ONLY run on DC power), you simply place
your engine on the rails, press “ADD ENG” and the system
will scan the track and automatically upload your engine into
the controller. At this point, you can press “START UP”, roll
the throttle and pull out! That's it!
Speed Control
DCS engines are controlled in scale miles per hour (smph) and
increments of one. So, that means if you dial up 10, your
engine will smoothly accelerate to 10 smph. There is no need
to select a speed step setting, there's only one precise linear
control at scale speeds. See, powerful yet simple.
Sounds
Independent Volume Settings
Using DCS, you independently adjust the bell, horn, engine,
and accent sounds volume. This is like a mixer so you can set
up the engine to fit your specific tastes and sense of realism.
They all move relatively up or down with the master volume
settings.
Doppler Loop
You can either press the Doppler button on the remote to
activate what we refer to as “one-shot” Doppler, or, using
DCS, you can program a Doppler loop that will peak at the
same point on your layout, over and over.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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Custom Sounds
You can fire any of 10 individual sound bites pre-loaded into
your engine. These are typically, diesel idling sounds. Each
one at the press of a single button. You can also make voice or
other audio recordings and play them back on command with
ease.
Proto-Dispatch
Press the “MIC” (microphone) button on your DCS remote
and speak. Your voice will be digitized and played out of the
model in real-time. Talk about station announcements!
Proto-Cast
Another MTH exclusive, you can connect any audio source
with a line output to the DCS TIU and send music, train
sounds, or anything you like down the rails to be played
through the engine as it moves along the track. Your holidays
may never be the same!
Lighting
As with everything in DCS, this becomes a little more than
obvious. Pressing the “HEADLIGHT” button turns off the
directional headlight and reverse light (if equipped).
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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DCC - Digital Command Control
DCC is a popular digital command scheme wherein the track
power is also a digital control signal. That is, using a DCC
controller, you can communicate with multiple engines and
have all of them moving at different speeds and in varying
directions on the same track at the same time. The
power/command signal remains constant and engines are
commanded to perform as desired. Your MTH PS3.0-equipped
engine has the ability to decode and respond to these DCC
commands. This allows you to operate your MTH
PS3—equipped engines together with engines from other
manufacturers using DCC decoders. They all can be controlled
by DCC systems from various manufacturers. The best part
about your MTH PS3.0-equipped engine is that the decoder is
built right in. No need to remove the hood and install speakers
or boards. It's all done for you at the factory. Each PS3.0-
equipped engine has a full complement of lights, sounds, and
smoke (if equipped). Just set the model on the rails, apply
DCC power and hit F3 on your DCC handheld controller and
you're off and running.
Basic DCC Operation
Your MTH PS3.0-equipped engine takes full advantage of
DCC's capabilities. Below are the basic commands you'll want
to know to get started running quickly. Please refer to the
Advanced DCC Operation section of the manual if you want
to dig into the full capability of DCC.
Each engine type may have a slightly different F Function list.
This depends upon whether it's steam, diesel, or electric and
whether it has smoke or not. Please refer to the table of
Default CV Values for your particular engine's F Functions.
A note about enabling/disabling F Functions in DCC -
Depending upon the DCC system you have you may need to
toggle a particular F Function on then off to actually get it to
enable. Some DCC systems do this for you automatically and
others allow you to set particular F Function buttons to either
be set for momentary or toggle. Please refer to your DCC
control station manufacturer's manual for more information on
how they handle F Function buttons.
Your MTH PS3.0-equipped engine's default short address is 3.
So all you have to do is power up your DCC system and call
up Locomotive 3 to begin.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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Start-Up/Shut-Down
F3 – Start-Up/Shut-Down
Pressing this twice (toggle on then off) will start up your
engine. When you apply DCC power your MTH PS3.0-
equipped engine will remain dark and quiet. Since you likely
don't want to run the engine this way, simply press F3 twice to
start your engine. The lights, sound and smoke (if equipped)
will come on. NOTE: You are actually able to move the
engine in DCC without starting it up. Just increasing the
throttle will cause the engine to move. In order for F3 to
function correctly the engine must NOT be moving
To shut your engine down, press the F3 button twice. This will
play the shut down sounds and then turn the lights and smoke
and sounds off. As long as there is DCC power still on the
track the engine can be started up again by pressing the F3
button twice.
Bell/Whistle (Horn)
F1 – Bell
To activate the Bell press F1. To deactivate it, hit F1 again
F2 – Whistle (Horn)
To activate the Whistle/Horn, press F2. To shut it off either let
off the F2 button or press and release it
PFA
F4 – PFA
PFA in MTH lingo stands for Passenger/Freight
Announcements. Your engine is pre-programmed for the
appropriate type of sounds based upon the type of service the
real-life engine used in daily operation. There are five sound
sequences or segments in the PFA feature. Each segment is
advanced by you, the operator. You hit the F4 button twice on
the DCC controller to let the engine know you want it to
advance (this toggles the PFA function on then off to clear the
remote for the next sequence). In most PFA sequences there is
a minimum wait time of about 20-30 seconds before it will
advance. So, here is how a typical PFA sequence operates:
1. Press the F4 button twice (toggle F4 on then off) to start the
PFA sequence on the engine. You'll hear “Now arriving…” for
passenger sound sets and cab chatter for freight sound sets.
The bell will then begin ringing.
2. Slowly reduce the throttle until the train stops at the desired
location and speed reaches zero. Press the F4 button twice
(toggle F4 on then off) again and the bell will stop ringing.
You will hear the engine sounds switch from the cab to the
station or yard with all the ambient sounds you'd hear in the
real thing.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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3. Press the F4 button twice (toggle F4 on then off) again to
advance the sequence. You'll hear “Now boarding…” for
passenger sound sets and freight yard sounds for freight sound
sets.
4. Press the F4 button twice (toggle F4 on then off) again to
advance the sequence. You'll hear “Now departing…” for
passenger sound sets and more freight yard sounds for freight
sound sets.
5. Press the F4 button twice (toggle F4 on then off) the last
time to advance the sequence. You'll hear “All aboard…” for
passenger sound sets and more freight yard sounds for freight
sound sets. The engine sounds will switch over to the cab
again. When the bell begins to ring, advance the throttle to
move the engine out of the station or yard. The bell will shut
off automatically.
Lights
F5 – Lights
This toggles all your lights (except the headlight) on and off
Master Volume
F6 – Master Volume
There are 10 volume levels. Pressing F6 twice (toggling on
then off) raises the Master Volume one level. The Master
th
Volume loops. That is, if you go past the 10 level it will loop
st
back around to the 1 or lowest volume level.
Forward/Reverse Signal
Just like a real engine, you can announce the direction of
travel using your DCC handheld and F9 and F10.
F9 – Forward Signal
Pressing F9 twice (toggling on then off) will sound the
Forward Signal. This is two whistle/horn blasts
F10 – Reverse Signal
Pressing F10 twice (toggling on then off) will sound the
Reverse Signal. This is three whistle/horn blasts
Crossing Signal
Again, just like a real engine, you can trigger the Crossing
Signal on your engine.
This is two long, one short, one long whistle/horn blast.
F11 – Crossing Signal
Pressing F11 twice (toggling on then off) will sound your
Crossing Signal.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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Engine Sounds
F25 – Engine Sounds
You can turn the Engine Sounds On/Off by pressing the F25
button. Pressing it once (enabling F25) will cause the Engine
Sounds to shut off. The Whistle/Horn and Bell sounds will still
be active, however. To turn the engine sounds back on press
the F25 button again (disable F25).
Additional F Functions
Idle Sequence – F13, F14, F15 and F16
Pressing F13, F14, F15 or F16 twice (toggling on then off)
will trigger an Idle Sequence if the engine is not moving.
These vary from engine to engine and may include things like
checking the coal load, checking the water level, using the
Alemite grease gun on the drivers, etc. When triggered, these
will run through a sequence that varies in duration.
Note: The engine must be sitting still in order to trigger these.
F17 – Extended Start-Up
If your engine is shut down or you've just applied DCC power
pressing F17 twice (toggling it on then off) will start the
Extended Start-Up sounds. This is very similar to F3 except
you will hear the crew talking back and forth about getting the
engine ready to run.
F18 – Extended Shut-Down
If your engine is already up and running you can play the
Extended Shut Down sounds by pressing F18 twice (toggling
on then off). The Extended Shut Down is very similar to F3 in
that the engine will ultimately shut down but in the case of
Extended Shut Down you will hear the crew talking back and
forth about how the engine ran, time schedules, etc.
F19 – Rev Up
This will force the engine to Rev Up. Press the F19 button
twice (toggling on then off) to Rev Up one notch. There are
eight rev levels in a Diesel/Electric.
F20 – Rev Down
This will force the engine to Rev Down. Press the F20 button
twice (toggling on then off) to Rev Down one notch. There are
eight rev levels in a Diesel/Electric.
For example, if you set the rev level on a Diesel to notch 6 and
start increasing the speed of the engine it will stay at that rev
level until the engine's speed calls for a higher rev level. Once
the engine has gone past that rev level, notch 6 in this
example, the engine will then rev down normally, all the way
to idle, as you decrease the speed.
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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F21 – One Shot Doppler
You can set your MTH PS3.0-equipped engine to simulate the
actual Doppler Effect sound a real engine makes as it passes
you. To do this, press the F21 button once (enable F21) and
then listen as the engine makes that pitch shift that mimics the
Doppler Effect perfectly. Press the F21 button again (disable
F21) to shut off the Doppler Effect. With a little practice in
timing and speed you can make this happen right in front of
you.
F22 – Coupler Slack
When an engine hooks up and pulls a train it has to take up the
coupler slack. You can play this sound by pressing F22 twice
(toggling on then off). This feature works two ways – While
the engine is sitting still, press F22 twice to enable it. Then,
when you move the engine, it will play the Coupler Slack
sound. The second way is to simply force the sound while the
engine is moving. To do this, simply press F22 twice (toggling
it on then off). The sound will play.
F23 – Coupler Close
To play the Coupler Close sound press the F23 button twice
(toggling it on then off). You can play this sound as you're
coupling cars together to add realism.
F24 – Single Horn Blast
To play a Single Horn Blast press the F24 button twice
(toggling in on then off). This plays a single, short horn blast.
F26 – Brake Sounds
Pressing the F26 button (enable F26) will disable the Brake
Sounds for your engine. The Brake Sounds occur when you
reduce the speed of your engine rapidly. To enable the Brake
Sounds press the F26 button (disable F26). Brake Sounds are
On by default.
F27 – Cab Chatter
Cab Chatter occurs when the engine is sitting at idle. There are
various times when the crew will talk to each other when the
engine is sitting at idle. Pressing the F27 button (enable F27)
will disable the Cab Chatter. Pressing the F27 button again
(disable F27) will enable Cab Chatter. Cab Chatter is On by
default.
F28 – Feature Reset
This resets features to default.
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FUNCTION CHART
F Key Description
F0 Head/Tail light
F1 Bell
F2 Horn
F3 Start-Up/Shut Down
F4 PFA
F5 Lights (except head/tail)
F6 Master Volume
F7 Front Coupler
F8 Rear Coupler
F9 Forward Signal
F10 Reverse Signal
F11 Grade Crossing
F12 Clickety Clack (On/Off)
F13 Idle Sequence 4
F14 Idle Sequence 3
F15 Idle Sequence 2
F16 Idle Sequence 1
F17 Extended Start-Up
F18 Extended Shut-Down
F19 Rev Up
F20 Rev Down
F21 One Shot Doppler
F22 Coupler Slack
F23 Coupler Close
F24 Single Horn Blast
F25 Engine Sounds
F26 Brake Sounds (On/Off)
F27 Cab Chatter (On/Off)
F28 Feature Reset
M.T.H. HO SD70ACe Diesel Engine w/Proto-Sound 3.0
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CV29
CV29 is the basic decoder setup CV that is used by all DCC
decoder manufactures. So, if you are familiar with CV29 from
other manufacturer's decoders MTH's is no different. The most
important part of CV29 is the ability to switch between long
and short addressing. By default, CV29 on your MTH PS3.0-
equipped engine is set to 2.
Long and Short Addressing
Like most DCC Decoders, your MTH PS3.0-equipped engine
can be programmed with both Long and Short Address. Short
addresses are those from 1-127 and Long addresses are those
from 128-9999. You can program the engine address either
with Programming on the Main (PoM) or using a
Programming Track. Since it's easiest, in most cases, to PoM
the instructions will show you how to do it this way.
By default, your MTH PS3.0-equipped engine comes
programmed with both a long and short DCC address. The
default Short address is always 3. The default Long address
will be 3333.
To change your engine’s Short Address using PoM:
1. Call up the engine's current address on your DCC handheld
2. Enter Programming on the Main on your DCC handheld
3. Enter the new address you want – Remember you can only
use address 1-127 for Short Addressing
4. Once you hit Enter the engine will give you a two
whistle/horn blast response
5. Call up the engine on its new address and away you go.
Alternatively, depending upon the type of DCC system you
have, you can enter PoM and then write the new address in the
Address Menu. This only works for short addressing. For
example, on an MRC Prodigy Advance2 system, you would:
1. Call up the engine’s current address on your DCC handheld
2. Hit the PROG button twice to enter PoM mode
3. Hit Enter twice so the LCD displays “Adr”
4. Type in the new Short Address (1-127) that you want and
hit Enter
5. The engine will give you a two whistle/horn blast response
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