Digitrax UT6 Series User manual

Digitrax, Inc.
2443 Transmitter Road
Panama City, Florida USA 32404
Support: helpdesk.digitrax.com
www.digitrax.com
Digitrax Manuals & Instructions are updated periodically.
Please visit www.digitrax.com for the latest version of all
manuals & for available firmware updates.
Digitrax UT6 Family Manual
Includes:
UT6, UT6D and UT6DE
C
T
C
omplete
rain
ontrol

© 2020 Digitrax, Inc. www.digitrax.com
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1.0 Introduction .....................................................................................3
2.0 Quick Start Guide .........................................................................5
2.1 UT6 LCD screen ............................................................................6
2.1.1 Home Operations Screen .........................................................6
2.1.2 Screen IDLE Power saver ..........................................................7
3.0 Operating on batteries without LocoNet cable ................8
3.1 Recharging a Digitrax BP600MH Battery pack .....................8
3.2 Powering a UT6 OFF.....................................................................8
4.0 How to select Locomotives and run trains.......................9
4.1 How to select a Locomotive address ....................................9
4.2 Selecting an Analog or non-decoder locomotive ............ 10
4.3 Additional address menus ..................................................... 10
4.3.1 Select a prior address using RECALL soft key................... 10
4.4 Releasing an address from a throttle .................................. 10
4.5 How to Dispatch Locomotives ...............................................11
4.6 How to Steal Locomotives, forcing selection ..................11
4.7 Status Edit: changing speed step settings ......................12
4.8 Multiple Unit [MU] or Consist operations .........................12
4.9 Adding a Locomotive to an MU .........................................13
4.10 Removing a Locomotive from an MU ................................ 14
4.11 MU of mismatched locomotives ......................................14
4.12 Controlling functions on MU’ed locomotives ................14
5.0 Locomotive Functions............................................................. 15
5.1 Controlling Functions F0-F9 .............................................15
5.1.1 Function 0 (F0) Headlights Forward and Reverse ...............15
5.1.2 Functions 1,3, 4, 5, 6, 7, 8 & 9 ............................................... 15
5.1.3 Function 2 (F2) Momentary Operation ................................. 16
5.2 Functions 10 through 19 ....................................................16
5.2.1 Quick access to Functions 10 through 19........................... 16
5.3 Functions 20 to 28..................................................................... 16
5.4 Troubleshooting Function Operation................................16
6.0 Switch/Turnout control mode ..........................................16
7.0 Expanded Menu Features ...................................................... 17
7.1 Utility tasks for setup: ........................................................17
7.1.1 Fast clock editor..................................................................... 17
7.1.2 UT6 Options Editor................................................................. 18
7.1.3 Duplex RF Scan (UT6D) ......................................................... 18
7.1.4 Duplex settings Editor .................................................................19
8.0 Emergency Stop......................................................................... 19
9.0 FCC/Regulatory Information................................................. 20
10.0 Warranty and Repair Information..................................... 21

© 2020 Digitrax, Inc. www.digitrax.com
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1.0 Introduction
Congratulations on your purchase of a Digitrax UT6 family of throttles. The
UT6 is a LocoNet throttle with Digitrax IR untethered capability and the UT6D
version has the same capabilities, with the addition of Digitrax Duplex teth-
erless operation. Both Duplex and IR operations work with existing Digitrax
compatible command stations, layouts and UR92, UR90 devices.
There are other international versions of the Duplex throttle and this manual
covers the complete family, since operations are consistent and similar. The
model ID is shown on the LCD screen at power on
To simplify operation the UT6 employs a color graphic LCD screen and a vari-
ety of cascading menus, up to five context-related soft keys and a built in con-
text-related help system that prompts available actions, or information on the
side-scrolling HELP line.
This context HELP system prompting, coupled with a color LCD screen makes
the UT6 very easy to use and a powerful layout control throttle. You will not
need to refer to a manual very often!
The UT6 throttle firmware can be downloaded and updated in the field using a
PC running the free DigiIPL app and connected to a compatible Digitrax USB
device. The UT6 functions and screens may change with updates from the
Digitrax Web site, so be sure to check the UT6 product pages to get the latest
information and .dmf download files.
The design of the Digitrax Complete Train Control®system lets you operate
your layout the way you choose. With LocoNet®you simply connect system
components to build the layout control system that you’ve always wanted!
The Digitrax system reduces and simplifies layout wiring.
There are many dierent combinations of Digitrax components that can be used
to set up a layout control system that is right for you. You can combine Digitrax
products with compatible decoders, boosters and computer software made by
other companies that build compatible equipment.
Your success with & enjoyment of our products are very important to us. After
all, this is a hobby and it is FUN!!! Please read this manual carefully before
using your product. There is additional information on this product and its oper-
ation at the www.digitrax.com. web site. We have included lots of hints and
operating ideas based on our experience. If you have questions not covered by
this manual please contact your dealer or visit our web site at www.digitrax.
com. The Digitrax on-line Tech Support Depot is always open, and support sta
is ready to help on our Help Desk at: helpdesk.digitrax.com.

© 2020 Digitrax, Inc. www.digitrax.com
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Power/
Back Key
Function/
shift key
Loco Key Menu Key
0-9
Numeric
Keys
Exit/Stop
Key
Switch
Key
Color LCD
screen
Throttle knob
Forward/Brake/
Reverse switch
Figure 1: UT6 family-controls and LCD screen view
Heartbeat
LED
0002
F
sp
50
Fn0+0 12 3 4 5 6 7 8 9
DigiT30 12 Trk
Press loco key then number
IR sensor
WARNING: Do not press
the black IR sensor cap!
Force applied to this will
void your warranty!

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2.0 Quick Start Guide
This Quick Start Guide will have you running a train with your UT6 in about a
minute! You will begin this process with an existing Digitrax command station
connected to a layout or a test track.
Make sure that you take any analog (address 0000/non-decoder) locomotives
o the track before you begin. Refer to Figure 1 for the UT6 throttle layout.
Figure 2 shows an example of the color LCD and the typical HOME screen
information display.
1. Power up your Digitrax Command Station as normal.
2 Plug the UT6 throttle into a LocoNet RJ12 type jack on your Digitrax
Command Station or layout using the LocoNet cable provided with the UT6.
3. The UT6 will beep and ash-up a start screen that includes the text
“Welcome to UT6” and other information, and then log-on to LocoNet, then
revert to a normal HOME screen. The STATUS BAR will show the text “LN”
to indicate connection via a LocoNet cable, and green “Trk” letters if the track
power is ON. The UT6 does not need batteries when plugged into LocoNet
4. Press the; loco key, then the key and then the key again.
5. The throttle display will now show address 0000 in big numbers mid-screen,
and a green arrow symbol showing direction, and a current speed indication
above this. The scrolling HELP prompt line at the bottom of the display pro-
vides useful operating hints and information in context as you use the UT6, or
if you get confused as to control actions possible.
6. Press the power key, and above key will show Trk_ON and Trk_OFF
above the key indicating the soft key action that will happen when you press
that key down. Press and check the track status led on the command station
is lit, indicating the track is now powered ON.
7. Twist the throttle knob right or left, and the speed % indication above
the direction arrow will change, and the track status led should change color
slightly. Flip the direction change switch to reverse the direction of the Analog
locomotive selected as address 0000. The direction icon in the LCD shows the
current system direction, and if this does not match the toggle switch, simply
swap the toggle switch to correct this.
8. With these simple steps you have made your rst locomotive address selec-
tion with your UT6 family throttle. Place an analog loco on the tracks to now
operate it on address 0000.
ENJOY running your trains!
Put a locomotive on the tracks that has a known decoder address, simply restart
at step 4 above, and enter the known decoder address numbers to operate that
locomotive. Note that the soft key meanings will change as the screens and

© 2020 Digitrax, Inc. www.digitrax.com
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contexts change, and the current key control is indicated by the adjacent screen
text.
The following sections provide additional information beyond the built in
scrolling HELP prompts. Check the Digitrax Web site for the latest UT6 infor-
mation. The UT6 software can be updated in the eld and so the operating
screens may change slightly over time.
The UT6 has a single throttle to provide a compact and basic function hand
held controller. To create a throttle that allows operation of keys and controls
single-handedly, a smaller LCD display was required. In most operations users
quickly nd they infrequently need to refer to the LCD screen. For conve-
nience the displayed locomotive address uses taller digits than e.g. the DT602.
2.1 UT6 LCD screen
The UT6 Display is a 1.5 inch color LCD screen. The screen provides a variety
of information and input prompts to assist in running locomotives and system
setup. This section outlines the Home Operations Screen, other menu displays
will be covered in following sections.
NOTE: The display is best viewed from directly above, viewing the screen at
some angles may distort the perceived screen colors and actions.
2.1.1 Home Operations Screen
Figure 2 shows the primary or HOME operations screen for the UT6. This is
the screen you will see most often when operating trains. The Home Operations
Screen and it’s items are shown below. This example is shown with a locomo-
tive selected. If you ever get lost you can always quick press the key to
return to this Home screen. A long press will begin emergency stop.
Figure 2: UT6 Home screen layout
0002
F
sp
50
Fn0+0 12 3 4 5 6 7 8 9
DigiT30 12 Trk
Press loco key then number
5. Upper soft key line
3. Function Info Bar
1. Loco Info Area:
Loco number, speed,
direction
6. Scrolling Help text
4. Lower Soft Key line
2. Status Bar

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1. The Loco Info Area is where the current locomotive information for the
throttle knob is shown. At left is a direction arrow icon with the current
direction indication. Showing forward as “F” inside an arrow, or reverse,
shown with an “R” inside the arrow. If a locomotive address is currently
selected this arrow icon will be green. If no loco is selected the icon will
be gray. The currently active address is shown in the large numbers in the
center. If a loco is selected the numbers will be solid black, if no loco is
selected the numbers will be gray. The LCD will show additional informa-
tion during locomotive selection, see section 4.0 for more information on
selecting locomotives.
2. The Status Bar is active for Home screen and will show the status of your
throttle. There are multiple indicators that appear in the Status Bar. An
“Ln” indicator shows when LocoNet is connected OK. The “Trk” indicator
is green when system track power is turned on. In IR or Duplex mode
connection information is shown if the throttle is unplugged and the IR or
Duplex modes are enabled with LocoNet support found. The battery sym-
bol shows approximate battery power when the throttle is unplugged
3. The Function Info Bar is where the state of a group of ten functions are
displayed. Active/ON function numbers are blue and inactive/OFF func-
tions are grayed out. For more info on controlling and managing functions
see section 5.0.
4. The Lower soft key line shows alternate available numeric soft key
actions when not in home screen state
5. The Upper soft key line shows alternate available numeric soft key
actions when not in home screen state
6. Scrolling Help text line. Shows status and prompts user actions.
2.1.2 Screen IDLE Power saver
To save power and be ecologically responsive, the UT6 will enter a dark dis-
play screen-IDLE after a user congurable no-activity timeout When in a
power saving IDLE mode the heartbeat LED will ash green about every 3
seconds. To exit IDLE mode press the or key to restore the color LCD
home display. A short press of the key is a consistent way to return to the
HOME screen from any menu. Note: holding the the key for more than
about 1 second will perform Emergency Stop. See section 8.0.

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3.0 Operating on batteries without LocoNet cable
All UT6 models can operate unplugged in IR tetherless mode if they detect
Digitrax Infra-Red (IR) capability when rst plugged into a working LocoNet.
The UT6D can additionally operate in wireless Digitrax Duplex mode if this
mode is enabled and it detects UR92/93 Duplex capability when rst plugged
into LocoNet, or joins by a Duplex RF Scan. See section 7.1.3.
To operate a tetherless mode you will need to install three AA size 1.5V batter-
ies in correct orientation in the rear battery compartment. After disconnecting a
battery powered UT6 from LocoNet, the throttle will enter the tetherless mode
both the UT6 and the LocoNet system are congured for.
The UT6D (Duplex) version can perform most of its tethered or plugged-in
functions while it is untethered,. After initial plug-in to congure Duplex capa-
bility it will automatically reconnect to the LocoNet system when disconnected
or powered up again untethered.
Duplex mode active will show the Digitrax NetName in the STATUS bar left-
side in black text, along with the signal strength bars, Channel number and
Battery level. If a Duplex message fails to get through the white LED will
ash, and if layout Duplex support fails the NetName will change to red text.
3.1 Recharging a Digitrax BP600MH Battery pack
1. Remove the 3 AA batteries from the UT6 rear compartment and plug the
3 pin plug from an optional BP600MH battery pack into the matching
socket. The yellow lead will be closest to the UT6 bottom edge. Form
the wires to the compartment lower area so they do not get crimped at the
case edge and then replace the compartment lid with the battery and wires
secure inside.
2. Plug in an external 10V to 18V DC supply (100mA minimum) with a 2mm
center-positive plug into the charging socket at UT6 bottom edge.
3. Press the key until you get the “Charg” text above the key, then
press the key. to start charging
4. The UT6 will enter charge mode and typically automatically stop after
about 14 hours. When in charging screen-IDLE mode the heartbeat LED
will ash red about every 3 seconds. Charge time depends on the battery
history, like; residual charge, temperature and tolerances etc.
3.2 Powering a UT6 OFF
To power OFF a UT6 that is untethered before the normal inactivity power
OFF timeout, press the key and then the key to power OFF completely.
In this state the UT6 will draw no battery power, and can be re-powered by
simply pressing the key again. The UT6 will not power down when on an
active LocoNet or plugged into DC power for charging.

© 2020 Digitrax, Inc. www.digitrax.com
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4.0 How to select Locomotives and run trains
Each decoder receives a unique address. To select a decoder equipped locomo-
tive and run it on your throttle, you must know it’s address. Digitrax decoders
are set up at the factory with the “default” address “03”. This means that when
you take a Digitrax decoder out of the package and install it in your loco, you
can select address “03” on your throttle and usually run the decoder.
4.1 How to select a Locomotive address
1. In order to select a locomotive you need to know it’s address and place it
on powered layout track..
2. Press the key once to enter loco selection mode, the large numbers in
the Loco Info Area will begin to blink alternating black and gray. .
3. Enter the address number of the locomo-
tive you want to select. The text above the
address number will provide you addition-
al information about the loco address num-
ber you are selecting. If it says “free” the
locomotive is available for selection. If
it says “busy” the locomotive is in-use on
another throttle, to select it you must com-
plete the Steal process. See section 4.6.
The second set of numbers, usually “128”
species the number of speed steps asso-
ciated with the address by the command
station. See Status Editing, Section 4.7 for more details.
4. If there is “cn”, “mid’, or “top” the locomotive is part of an MU/consist,
see section 4.8 regarding consisting.
5. Once you have entered the address, press the key again. The entered
address number will go steady black and you will have control of the loco-
motive. Make sure that Track Power is turned on and the decoder inside
the locomotive has good pickup connections. The Track Status Indicator
should be lit.
6. Turn the Throttle Knob to now run your Locomotive. Change direction
with the direction toggle switch.
0002
F
sp
50
0 1 2 3 4 5 6 7 8 9
Menu key for choices
:Adr-free, 128

© 2020 Digitrax, Inc. www.digitrax.com
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4.2 Selecting an Analog or non-decoder locomotive
A locomotive without a DCC decoder is called an Analog locomotive and is
run on address 0000. While an analog locomotive, with no decoder, is sitting
still on your digital layout, you will hear a “singing” sound. Once the analog
locomotive is moving, this sound will change and be less noticeable. To avoid
heat build up in your locos without decoders, Digitrax recommends that analog
locos NOT be left sitting on DCC powered track for long periods of time when
they are not running.
4.3 Additional address menus
In address selection mode, press the menu
key to bring up 5 new numeric soft keys and
associated additional address menu tasks as
shown. The display you see may be slightly
dierent from that shown to the right, depend-
ing on exactly the history of address selections
for your system.
4.3.1 Select a prior address using
RECALL soft key
In loco selection mode with the menu key
pressed, the key is now a soft key showing
address “Recall” choice. Press this key to
bring up the non-volatile list of the last 6
unique addresses used on this UT6
When in Recall Session Loco List screen,
pressing a 0-5 numeric key with the address to
the right will enter that number as the selection
address For example if you press the 5 key
for the recall screen shown to the right, then the address 1000 will be entered
as the recall selection address. The selection screen will go back with this num-
ber and then pressing will complete the selection of address 1000.
4.4 Releasing an address from a throttle
When you are nished running a locomotive address, it is best practice to
release it from your throttle, so that it is available for other throttles to select
and run.
1. Use the Throttle Knob to make the locomotive’s speed zero (this option-
al step is strongly recommended as the loco will continue to move after
released if speed is not zero).
2. Press the key to go into locomotive select mode.
0- 0002
1- 0775
2- 0003
3- 0000
Press List# to recall
4- 4425
5- 1000
0002
F
sp
50
Fn0+0 12 3 4 5 6 7 8 9
:Adr-free,128
Menu key for choices
Mu+
St EditRecall
Mu- Dispch

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3. The address will begin to blink in the display. Press the key, this will
release the address from both the UT6 and the locomotive stack in the sys-
tem. The display on your UT6 will show the previously selected address
grayed out.
4. If you press the key again, the UT6 will begin ashing the address you
just released. You can re-select that address if still free by pressing the
key again, or you can enter a new address number to select.
4.5 How to Dispatch Locomotives
Dispatching is a special feature incorporated in the LocoNet system to meet
the needs of operators that wish to enforce a strict discipline in how operators
gain access to locomotives during an operating session. Dispatching also lets
you run consists with basic throttles that can’t set up their own consists and run
four digit addresses on basic throttles that only have two digit capability. It lets
you have newcomers run trains on the layout without giving them access to the
entire operation.
When you dispatch a locomotive address or consist to your LocoNet system,
you make it available to be acquired by another throttle. Only one address at a
time can be marked as a dispatched address in the system.
To dispatch a locomotive address using the UT6
1. Press the key to enter address selection, enter the address you want to
dispatch.
2. Press the key now marked “Dispch” to dispatch the entered Loco
Address.
The dispatched address can be a single locomotive address, either two digit or
four digit, or a consist/MU TOP. The TOP locomotive in a consist or MU can
be dispatched to transfer control of the entire consist to another throttle.
4.6 How to Steal Locomotives, forcing selection
If you try to select a loco address that is already selected on another throttle the
UT6 will display “adr-busy” in red above the address in the Loco Info area of
the display when the address is entered.
This is a safety interlock to prevent operators from taking control of locos that
are already selected on other throttles. Occasionally it is necessary to override
this interlock to gain control of a loco that is “lost” for whatever reason. This
override is called “stealing a locomotive”. When stealing with the UT6 it is
then possible to have an address selected on more than one throttle on your
system.
To steal an address with the UT6:
1. Press to enter selection mode.
2. Enter the address of the loco you want to steal and press again.

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3. A scrolling message will appear in the Scrolling Help Text Area reading
`”Press YES to steal Loco, No to exit” and the lower soft keys will change
to “YES” and “NO” choices.
4. To steal the loco address press key marked “YES”, to cancel the selec-
tion press key marked “NO”.
4.7 Status Edit: changing speed step settings
To Change the Speed Step Settings for a Decoder:
1. Select the loco address you want to
status edit.
2. Press once to enter loco selection
mode, the large numbers in the Loco
Info Area will begin to blink black and
gray.
3. Press the menu key. This will bring
up the 5 additional loco selection tasks.
4. Press the key to enter Status edit
mode. The lines will start with the num-
ber key that will select the step mode on the right side of the line.
5. Press the number on the keypad to select the corresponding speed step
setting. The menu will exit and you will see the corresponding speed selec-
tion in the Additional Loco Selection Info area.
6. Once the speed step setting you want to use is in the display, press the
key to complete the selection and speed step setting change. Once this
change is made, the Digitrax command station will send DCC commands
to the edited decoder in the speed step setting you entered.
4.8 Multiple Unit [MU] or Consist operations
It is not uncommon to see two, three or even four diesel locos pulling in consist
at the front of a train. Sometimes, there is a locomotive added in the middle of
the train or at the end of the train to give “helper service” to the head end loco-
motives. This is called Multiple Unit Operation or MU operation. With DCC,
each locomotive is separately controlled. But in the case of MUing we would
like to have more than one locomotive address controlled by a single throttle to
simplify MU operation.
Your UT6 uses universal consisting to make MU operations simple and easy
to do. This is the most exible and realistic method of MUing available. You
can add any locomotive to your MU, no matter what kind of DCC decoder
is in your loco. You can even add an analog loco to your MU.
You can add a locomotive to an MU in either orientation and in any physical
location in the train. When you send commands to the MU you use the address
1- 28: 28step
2- reserved 1
3- reserved 2
4- 128: 128step
Status Edit loco mode
5- 28A: 28step/CV19
6- reserved 5
Status Edit Loco:
8-128A:128step/CV19

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of the TOP locomotive to control the entire MU and the command station
handles the rest of the commands to the other locomotives in the MU. As the
address you will use to control the consist is not necessarily the address of the
lead or head end loco, we use the term “TOP” for this special address. The
TOP address can also be the train number.
You will not be able change the speed or direction of any individual loco that
is added to an MU, however you can control individual locomotive functions.
Locomotive speed and direction for all locos in the MU are controlled by the
TOP address
4.9 Adding a Locomotive to an MU
To MU two locomotive addresses together with the UT6:
1. Choose two locos you want to MU together. Place them on the track.
Make sure that both locos that will be part of the MU will run in the same
physical direction. Select and run the rst loco to determine which way itis
headed. Then select the other loco and run it in the same physical direc-
tion. They are now ready to consist.
2. Select the address you want to use to control the MU. This will be the
TOP address. To do this, press enter the address numbers & press
again.
3. Press again to re-enter loco selection mode, and the large TOP address
numbers in the Loco Info Area will begin to blink black and gray.
4. Press the key to bring up the 5 additional loco selection tasks The
numeric keys will now show soft keys; Recall, Status Edit, MU+, MU- and
Dispch choices.
5. Press key labeled “MU+”: This will enter MU add mode. The display
will now show the TOP address above the blinking loco address number. It
will say “Consist To:” and then your chosen TOP loco’s address to conrm
the address that the new loco will consisted to.
6. Use the Keypad to enter the locomotive address you wish to add to the
consist.
7. Press the Function/shift key to make the consist addition of the newly
selected address.
8. You may enter a new address and press the again to add another loco to
the TOP locomotive consist, or press the key to exit back to the origi-
nal TOP locomotive on the throttle.
If your MU could not be set up, the UT6 will display and informational mes-
sage in the Scrolling Help Text line.
This happens when you try to link to an address that is already part of an MU
or link an address that is under the control of another throttle. For example if

© 2020 Digitrax, Inc. www.digitrax.com
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you MUed address 14 to the TOP loco 23 and then tried to MU another address
to 14 you would get this error. If you wanted to add another loco to the MU
with 23 as the TOP address, the right way to do it is to add that loco to 23, not
to another address in the MU.
4.10 Removing a Locomotive from an MU
To remove a locomotive address from an MU:
1. Select the locomotive address you want to remove from a consist. To do
this, press and enter the address numbers. The large address numbers
in the Loco Info Area will begin to blink black and gray, and the consist
ag “cn” should show in the Loco Info area indicating this address is in a
consist.
Press the key to bring up the 5 additional loco selection tasks The
numeric keys will now show soft keys; Recall, Status Edit, MU+, MU- and
Dispch choices. MU- choice will only show if the address is consisted.
2. Press the key labeled “MU-”: This removes the ashing address from
the consist. The UT6 will exit MU mode and the removed locomotive will
now be selected on the throttle.
4.11 MU of mismatched locomotives
If all the locomotives in the MU have performance characteristics that are
closely matched, you can run all the MU’ed locomotives in e.g. 128 step mode.
If the units are completely mismatched (for example, if you are running two
dierent brands of locos with noticeably dierent characteristics), then we
recommend speed matching the locos by programming the decoder with either
Simple 3 step or Advanced 28 step loadable speed tables (See the Decoder
Manual on the Digitrax web site for more information on these features of
DCC decoders).
4.12 Controlling functions on MU’ed locomotives
Even though an individual locomotive is added to an MU so you can’t control
its individual speed and direction, you can still control its function outputs
independently as follows:
1. Select the loco that is part of an MU which you wish to independently con-
trol functions. To do this, press enter the address numbers & press
again to complete selection of the consisted loco.
2. Now use the numeric keypad to control the consisted loco’s functions like
you would any other loco. The changes will take eect immediately if the
locomotives are moving, otherwise changes will take eect when you rese-
lect the TOP address on the throttle.
3. When you are nished turning functions on or o for the consisted loco,
simply select the TOP address and resume running the MU.

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4. Remember, you will not be able change the speed or direction of any indi-
vidual loco that is part of an MU. Locomotive speed and direction for all
locos in the MU are controlled ONLY by the TOP address loco.
5.0 Locomotive Functions
Most DCC decoders have function outputs that you can use to control lamps,
LEDs, sound, smoke generators and other on/o devices installed in your loco-
motives. Most locomotives made today come with a head light and sometimes
with a rear light, too. With DCC, these are controlled by the decoder’s function
outputs. You can also install additional DCC controlled lighting such as cab
lights, Mars lights, ditch lights, rotating beacons and others on your locos. The
addition of these functions can add to the fun and realism of your locomo-
tives. You must have the functions installed and connected to the appropriate
decoder function leads in order to use the following keys.
5.1 Controlling Functions F0-F9
By default, in Home Screen mode the keypad numbers operate functions on
and o.
To operate functions F0-F9 on your locomotive:
Select the loco you want to control. Press the key until you see “Fn0+”
at the left of the Function line. This group means numeric 0-9 keys now
control functions 0 to 9.
Use the UT6’s numeric key pad to turn the same number 0-9 functions on
and o. For example, to turn the head light or F0 on, press the key.
Press the key again to turn it o. The corresponding function number 0
will go blue for ON and gray for OFF in the Function Info Bar in the dis-
play.
5.1.1 Function 0 (F0) Headlights Forward and Reverse
Press the key to toggle F0 between on and o. Each time the key is
pressed while in function mode, Function 0, also called F0 will change from o
to on or vice-versa. On locos with reversing head lamps and back up lamps, the
head lamp or back up lamp in your loco will come on depending on the direc-
tion of travel of the loco. Function 0 is most often used to turn on/o the head
light/back up light but can be set up for other functions as well (See your
Decoder Manual for more information).
5.1.2 Functions 1,3, 4, 5, 6, 7, 8 & 9
Press the number key on the numeric keypad that corresponds with the function
number you want turn on/o. The function will toggle between on and o each
time you press the number key.

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5.1.3 Function 2 (F2) Momentary Operation
Press the 2key on the numeric keypad. The 2key operates Function 2 and
is the preferred function for whistle or horn operation. This key is set up as a
“non-latching key” so that if a horn or whistle sound is installed in the loco, it
will sound for as long as the key is held down. This lets you vary the length of
time that the horn or whistle blows, just like the prototype.
5.2 Functions 10 through 19
1. Press the key until you see “Fn10+”at the left of the Function line.
2. This group sets 0-9 keys to control functions 10 to 19..
5.2.1 Quick access to Functions 10 through 19
1. Press and hold the key until you see “Fn10+”at the left of the Function
line. This forces group 10-19 override, whatever the last group was, to
give fast access to functions 10-19.
2. While holding the key down the 0-9 keys will now control functions 10
to 19
3. Release the key to revert to the prior group of functions.
5.3 Functions 20 to 28
1. Press the key until you see “Fn20+”at the left of the Function line.
2. This group sets 0-8 keys to control functions 20 to 28. There is no F29
DCC function.
5.4 Troubleshooting Function Operation
If the function you want to operate does not respond, check the following:
1. Is Track Status/Power on? If not press the Power/Back Key to turn it on.
2. Did you select the correct loco? If not, select it now.
3. Is the function you want to use installed in the loco? If not, you may need
to install it. Most new locos have a head lamp/backup lamp installed, but
some do not have any additional lights or sounds installed.
4. Change the position of the Direction Control switch and see if the lamp
comes on in the other direction. If the normal direction of travel feature in
the decoder loco is set for the opposite of what you were expecting, you
will see the head lamp operating in what you expected to be the reverse
direction and vice versa for the back up lamp. See your Decoder Manual
for information about how to change the Normal Direction of Travel
(NDOT).
6.0 Switch/Turnout control mode
Switch Mode is most commonly used for sending commands to accessory
decoders to control layout turnouts, and also for changing Option Switches
(OpSw) on some other LocoNet devices. Switch commands may also be used
for controlling Digitrax compatible signal units. This section assumes that you
have already installed and programmed turnouts and turnout decoders on your
layout.

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To change the position of a turnout:
1. Press the or switch key.
2. The last switch address you selected will be displayed in the top area of
the display. If switch number e.g. 0033 was the last you used and was
thrown, the display will show “Switch:0033=Throw”.
3. Use the numeric keypad to enter the turnout address for the turnout or
switch you want to change.
4. Press Function/shift to toggle between “Thrown” action, and “Close”,
to change the turnout or switch accessory decoder position.
5. When you have nished your switch operations, press to return HOME
to normal operation mode.
NOTE: The “Close” or “Throw” shown in the display may or may not
match the physical position of the turnout selected.
NOTE: When you are in switch control mode, the throttle knob and the
locomotive direction switch will continue to drive the loco address running
on the throttle, but the numeric keys are used for switch address selection
and not function control.
7.0 Expanded Menu Features
To reduce display clutter the UT6 places expanded menu choices in a menu
system accessed by the or MENU key. Pressing the key from the
HOME screen will bring up the MAIN Menu screen with numeric key selec-
tion choices shown, such as; Utility Tasks, etc.
7.1 Utility tasks for setup:
To enter the Utility Menu, from the home screen press the key. Main Menu
A will display giving you a list of menu options. Select 3- Utility Tasks by
pressing the key on the keypad. This will enter the Utility Menu
7.1.1 Fast clock editor
In the Utility Task menu screen press the key to enter the fast clock edit
screen. The prompt line describes the key inputs.
1. The speed knob changes the time hours or minutes. Press down the throttle
knob to swap knob from minutes to hour edit.
2. Use the key to swap to from Alarm setup mode.
3. The numeric keys set the fast clock rate, up to a maximum of x20. Rate of
00 stops the fast clock.
4. When the values are what you want, press the key to update the fast
clock settings back to the system.
5. Press key to exit fast clock editing

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7.1.2 UT6 Options Editor
In the Utility Task menu screen press the key
to enter the throttle Options Editor screen. This
is where you can personalize many settings for
this UT6.
1. In Options Editor the knob scrolls through
the available option line ID numbers and
the key changes the current setting. The
“UP/DOWN” soft keys will also change
the ID number of the option.
2. When you have the desired throttle options setup press the key to save
the settings and exit. These settings will be remembered even after the
throttle is powered o.
3. Line ID# 40 is the return to Factory Default setting choices, which are ne
for most users.
The available Option ID’s are described by the LCD text, and more details are
on the Digitrax web site.
The LCD normal brightness level is set by Option ID15 “Max LCD brite
level”and will begin to dim to level ID16 “Min LCD brite level” after ID18
“LCD Brite hold delay “. For ID18=0 the LCD is always ON, with no power
saving.
ID19 “LCD pwr save delay“ sets the time at the lower ID16 level before the
display turns OFF for maximum power save and battery life. Higher numbers
increase LCD brightness and delays.
Option ID8 “Enc=> LCD wake” and ID9 “FnKey=>LCD wake” allow you
customize which input actions will restore LCD display, whilst these actions
still control your locomotives with the LCD is dark.
Option ID22 “Basic Mode” set ON disables switch control, and the ability to
change track power for this UT6.
7.1.3 Duplex RF Scan (UT6D)
While NOT plugged into LocoNet with Duplex mode enabled, in the
Utility Task screen press the key to enter the Duplex Scan screen.
1. Press the key to scan All Duplex channels (each channel takes about 1
sec to scan),
2. Press the key to scan just the Current duplex channel,
3. The Duplex networks seen will display, with highest ten showing: Bars of
signal strength, channel number, and Net name. A following letter K indi-
cates you will need the 4 digit key to join that network,
4. Use the encoder knob to highlight the line with wanted network name,
5. Press the “Join Net numeric soft key to Join the selected network.
1 Ballistic Enc :on
2 Key klik :on
3 Duplex allow :on
4 IR allow :off
Knob to underline opt
5 Fast Clock :off
ID Name State
Up Down Chng

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6. Use the number keys to enter the KEY code, if required
This allows a UT6 to join a Duplex network without plugging in.
7.1.4 Duplex settings Editor
If a UT6 is plugged into LocoNet, in the Utility Task menu screen press the
key. All UT6 throttles will show the Duplex Edit screen, allowing Duplex set-
ting modication.
1. Follow the prompt scroll to select and modify the Duplex settings wanted
by using the knob and knob press down.
2. When complete press the key to write the new settings to the LocoNet
system.
3. A Key value 0000 turns OFF the joining pass-key# requirement.
8.0 Emergency Stop
To stop everything on a powered layout immediately:
Press the key then the key to turn OFF track power to the whole layout.
This option will stop everything on the layout, without knowing what locomo-
tive is on which throttle, or the need to actively control the speed of any loco-
motive.
Do not turn Track Power o during a short circuit. Clear the short rst.
To Emergency Stop the active knob controlling a locomotive: Press and
hold down the key for about one second and the speed will go to zero and
the throttle will beep. Release the key.
Having Trouble Stopping? If the deceleration CV value you set for a partic-
ular loco is very large, this can make it look like the loco is not stopping on
command because the deceleration CV value is causing the loco to take a long
time to come to a stop. Emergency stop commands force an immediate stop
with no deceleration delays.

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9.0 FCC/Regulatory Information
FCC: UT6D/DE contain FCC Module ID: LV3RF28
Declaration of Conformity: “This device complies with part 15 of the FCC
Rules. Operation is subject to the following two conditions: (1) This device
may not cause harmful interference, and (2) this device must accept any inter-
ference received, including interference that may cause undesired operation.”
“This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instruc-
tions, may cause harmful interference to radio communications. Howev¬er,
there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television recep-
tion, which can be determined by turning the equipment o and on, the user is
encouraged to try to correct the interference by one of the following measures:
Reorient or relocate the receiving antenna. Increase the separation between
the equipment and receiver. Connect the equipment into an outlet on a circuit
dierent from that to which the receiver is connected. Consult the dealer or an
experienced radio/TV technician for help.”
OEM RF28 Manufacturer/Responsible Party: Digitrax Inc., 2443 transmitter
Rd, Panama City, FL 32404, USA. [phone]. Model: RF28
“Changes or modications not expressly approved by Digitrax Inc., the party
responsible for original RF28 Certication compliance under 47 CFR15.212,
could void the user’s authority to operate the equipment”
Canada ISED RSS: Contains Canadian ID module: IC:3015A-RF28
This device complies with Industry Canada’s licence-exempt RSS’s. Operation
is subject to the following two conditions: (1) This device may not cause inter-
ference; and (2) This device must accept any interference, including interfer-
ence that may cause undesired operation of the device.”
“Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux
appareils radio exempts de licence. L’exploitation est autorisée aux deux con-
ditions suivantes : 1) l’appareil ne doit pas produire de brouillage; 2) l’appareil
doit accepter tout brouillage radioélectrique subi, même si le brouillage est sus-
ceptible d’en compromettre le fonctionnement.”
RF28 RF Exposure Guidance: “In order to comply with FCC / ISED RF
Exposure requirements, this device must be installed to provide at least 20 mm
separation from the human body at all times.” “An de se conformer aux exi-
gences d’exposition RF FCC / ISED, cet appareil doit être installé pour fournir