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Atlas User Manual: Diesels with QSI Sound 28/52 13 January 2015
Decoders (Quantum, Quantum Titan, or
Quantum Titan with ET)
Note : If the DCC system speed control is set to any speed step except 0, Air Brakes are not enabled; instead the F7
key will now manually activate Squealing Brake/Flange sounds but will not affect the locomotive’s deceleration.
4.1.12 Mute (F8 Key)
The Quantum System allows you to reduce the System Volume to a lower programmable Mute Volume level or
increase it back to its original setting using the F8 function key. The default Mute Volume is 0 (no sound during Mute ).
This capability is useful when you need to reduce the sound to engage in a conversation or to answer the phone. If
you have many trains operating at once, you can reduce the volume on all those that are running in the background of
the layout and increase the volume of the closest locomotive. The
Mute feature changes the sound gradually over a
second or two, which allows the sound to increase or decrease realistically as the locomotive approaches or recedes
from the observer.
Press the
F8 key in Neutral, Forward , or Reverse to gradually decrease or increase the locomotive’s volume.
Note : The Mute st ate is not maintained if power is turned off and back on; the locomotive will return to full volume
setting.
Note : Mute Volume can be set in CV51.1. (See Section 4.2.8.)
4.1.13 Heavy Load (single-press F9 key in Forward or Reverse)
If Heavy Load is applied while the train is moving; it maintains the train at a steady speed while allowing you to have
control over the sound effects of a working locomotive. Under Heavy Load , changing the throttle will have little effect
on the locomotive’s speed. Instead, you can use the throttle to control your locomotive’s Notch and Laboring Sound-
of-Power sound effects. When you approach a grade under Heavy Load , increase the throttle and hear the locomotive
rev up to a higher Notch and work hard with heavy laboring sounds. When the locomotive goes down a grade, reduce
the throttle to diminish the locomotive’s
Notch and Laboring sounds. You can control how hard the locomotive works
by changing how much the throttle is increased or decreased from its initial position (where Heavy Load was turned
on).
To turn Heavy Load on and off:
•
Press F9 and hear one short Hoot when Heavy Load is turned on
•
Press F9 again and hear two short Hoots when Heavy Load is turned off
.
Note : You can apply Heavy Load as soon as you start moving or wait until you are up to speed.
Note : Return the throttle to its initial setting (where Heavy Load was turned On) to avoid acceleration or deceleration
when Heavy Load is turned Off.
Note : Heavy Load can only be turned on or off in Forward or Reverse . If turned on, it will remain on in Neutral. If you
want it off when you start out from Neutra l, turn Heavy Load Off immediately after the DCC system speed control is
first turned up.
Note : Heavy Load is automatically turned off when track power is turned off.
Note : Heavy Load represents a train that would take over ten minutes to accelerate to full speed or to bring to a
complete stop. It is independent of any inertia (or momentum) values set in CV3, CV4, CV23, or CV24.
Note : Under RTC and Heavy Load , grades, voltage changes, tight curves, or other real loading effects will have little
effect on the speed of the train. By contrast, under STC and Heavy Load , grades, loading, etc. will affect the train
speed as it moves around the layout.
Note: Applying Air Brakes ( F7 + throttle at speed step 0) will slow the locomotive, but it will take a much longer time to
stop.
4.1.14 Three Stages of Diesel Locomotive Shut Down: (1) Disconnect, (2) Standby, (3) Total
Shut Down (double-press F9 Key in Neutral )
Locomotive Shut Down has three distinct stages that you can control. Each stage is entered by double-pressing the
F9 key
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when the locomotive is in Neutral or in one of the Shut Down states.
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Double-pressing ensures that Shut Down stages are not entered or exited accidentally. Double-pressing is defined as two F9
commands sent within two seconds. Note that the F9 key may sometimes have to be pressed three times, due to the command
station and locomotive having different initial states for F9 .