Page 10
Sound-of-Power™
Your diesel locomotive will produce labored diesel motor sounds under acceleration and lighter
diesel motor sounds under deceleration but only if CV 3, or CV 23 and CV 4
,
or CV 24 are set to
non-zero positive values. The level of labored sounds is proportional to the values for these four
CVs, and how much the throttle is increased or decreased.
Diesel Motor
RPM: Quantum
has all eight diesel motor throttle
"notches"
found on prototype
locomotives.
As
you
increase
the throttle, you will hear the RPMs increase for every increase in
ten speed steps (at
128
speed step setting).
Idle
is considered Notch 1 and occurs for speed step
0. Notch 2 ranges from
1
to 10, Notch 3 from
11
to 20, Notch 4 from 21 to 30, etc. If your
controller has an option
to
increment or decrement your throttle set setting by
ten
speed steps, it is
very easy and predictable
to
set your notch value.
Horn and Bell Buttons (F2, F1)
Some
DCC
controllers have separate horn and bell buttons along with Function Keys assigned to
Horn and Bell operation.
The horn
is usually assigned to
F2
.
The F2 key behaves differently than
using the horn button.
•
Pressing the
F2
key and releasing it will cause the horn
to
come on and stay on, until
you press
F2
again
25
.
•
Pressing
the horn button will blow the horn only as long as you are holding it down.
Pressing
the F1 key and releasing it will cause the bell to come on and stay on, until you press F1
again.
There is
no difference in operation between the bell button and its corresponding Function
Key.
Doppler Operation (F6)
With DCC
,
you
can trigger the Doppler effect by quickly interrupting the horn signal in the same
way it is described under
Analog
control.
Or
you can use the Function Key dedicated to the
Doppler effect.
•
Start the horn and/or bell by pressing and releasing their function keys
26
.
•
Press
F6 to hear the Doppler shift. A few seconds after
the horn
button is turned
off
with
the F2 key the
engine
sounds return to normal
27
.
Squealing Brake and Flange Sounds (F7)
•
Quantum provides automatic brake squeal as an engine slows to a stop.
The
operator
can also control squealing sounds for continuous and variable brake sounds
for
protracted stops or to simulate the sounds of squealing wheel flanges on curved track
.
•
Squealing Brakes come on automatically when the speed is reduced from high-speed
travel (over 40 smph) to less than 20 smph.
•
Pressing
the
F7 key when the engine is moving at any speed will manually activate
Squealing
Brake
sounds
,
and repeated pressings while the Squealing Brake sounds
are occurring will continue the sounds
uninterrupted
.
Note:
If you slow the engine too quickly, the brake sounds will terminate abruptly when the
locomotive
stops and enters neutral.
Note:
If you
lower your
throttle
to
speed step 0 on a moving locomotive,
the F7
key will apply
Air
Brakes as long as the
locomotive
continues moving.
See
next section.
Air Brakes (F7)
If you have
selected any
non-zero
deceleration
inertia
or momentum value in CV 4 and/or CV
24,
the F7
key
can be used to apply brakes to stop the engine more quickly
than it would
normally
stop from
the
inertia settings
2
8
.
To
use
Air
Brakes:
•
Turn the throttle down to speed step 0 on a moving engine; this enables the F7 key to
act as a brake
.
•
Press the
F7
key
.
Hear
a
brief brake squeal sound and air being released from the
brake
lines
continually.
The
longer the air is released the greater the braking action.
•
Press the F7 key again to stop the air release. The train will continue to slow at the
last
braking
value.
•
If you
want
to
apply more braking, press
the
F7
key
again
to
release more air.
When
you
reach
the
desired amount of braking, press
F7
again
to
stop the air
release.
Note:
If you
continue
to
release air (for over 24 seconds total), all the pressure will be
released
and
brakes are on full;
you
will hear no
further
air
release
sounds
.
•
Turn up the
throttle
to any
value
above Oto release the brakes; this returns the engine's
deceleration
to
a
value
determined by
the
sum of CV 4 and CV
24.
•
If the
engine is in Neutral when the F7 key
is
pressed, a long air
release
sound
simulates setting
the brakes.
However,
no braking effect is
acti
v
ated
2
9
.
If the
throttle
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
engine's
deceleration
.
25
Since
the
prototype
horn uses
compressed
air,
you
may hear
the
air
pump sounds
tum
onafter
the
horn
is
operated.
26
If
you donottum
on
either horn
or
bell
,
the doppler
shift
will
still
occur
but
will
be
less dramatic.
"
Ifthebell was
on, it
will
shut off
prior
to
sounds
returning
to
normal.
28
C4andC24
determine the
deceleration
rate.
Applying
the
brakes
increases
the deceleration rate temporarily
.
"
If
thebrakes
are
set in neutral,
turning
up
the
throttle
automatically
releases the
brakes.
