SoundTraxx LC Series Owners Manual - Manual (Page 27)

LC SERIES DIGITAL SOUND DECODER OWNER’S MANUAL
Practical Examples:
Headlight and Firebox Flicker
Consider a small steam engine that does not have a backup light, In such a case, the DSD-LC’s
extra backup light output can be used to control some other light such as a cab light, number
boards or firebox light.
To set the backup light as a firebox effect, we refer to Table F and program CV 50 to 13. At this
point the flicker effect is on only when F0 function is on AND the locomotive is reversed, so we
use function mapping to activate the effect in the forward direction by setting CV 34 to 3. Now the
headlight and firebox lights will both be turned on by the F0 key but the headlight will only work
when the engine is moving forward while the firebox light glows in both directions.
Headlight and Mars Light
Early diesel engines like the EMD F-9 had seldom use for a backup light. This is another case
where the DSD-LC’s extra backup light output can be used to control some other lighting effect.
To set the backup light as a Mars Light we refer to Table F and program CV 50 to 2. As before,
the effect is on only when F0 function is on AND the locomotive is reversed, so we use function
mapping to activate the effect in the forward direction by setting CV 33 to 3. Now the headlight
and Mars light will both be turned on by the F0 key but only work when the engine is moving
forward.
Flashing Ditch Lights
This time we will use the headlight and backup light outputs to create a pair of Type I ditch lights
that alternately flash when the horn is sounded. When the horn is off, the lights will change to a
steady ‘on’ state.
Using Table F, the headlight is set to a Type I ditch light, Phase A with Crossing Logic On by set-
ting CV 49 to 41. To get the lights to flash back and forth, the backup light is set to a Type I ditch
light, Phase B with Crossing Logic On by setting CV 50 to 57. Remap both lights to F0(fwd) by
setting CV 33 to 3 and CV 34 to 0. Finally, set the flash rate to 7 and the hold time to 4 seconds
by setting CV 59 = 7+ (4 X 16) = 71.
Step 7: Configuring the Sound Effects
Bell Settings
The DSD-LC provides two CVs for setting the bell sound effect:
CV 114, Bell Ring Rate
CV 114 controls how fast the bell will ring. There are 16 settings, with 0 being the fastest ring
rate and 15 being the slowest rate.
CV 121, Bell Volume
CV 121 can be set to any value between 0 and 255, with the minimum volume being 0 (sound is
off) and the maximum is 255. The default is 128 or 50% volume.
Whistle/Airhorn Settings
The DSD-LC provides two CVs for setting the
whistle or air horn sound effect:
CV 115, Whistle/Airhorn Selection
CV 115 selects a Light, Medium or
Heavy whistle (steam) or a single
chime, three chime or five chime
airhorn (diesels). (See Table G.)
Light/Single Chime
Medium/3-Chime
Heavy/5-Chime
Whistle/Horn CV Value
0
1
2
Table G.
CV 115, Whistle/Airhorn Selection
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