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MTH 392E Operating Manual
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ENHANCED NEUTRAL STEAM SOUNDS
The enhanced Neutral Sounds can be automatically heard whenever the engine is in neutral.
The sounds, which include Steam Pop-Off, Steam Blow-Down, and Steam Injector sounds
occur every 2 to 30 seconds. Each of the three sequences will play at random intervals to
eliminate repetitive and boring sequences. While the sounds are selected to play randomly by
the microprocessor, there is no guarantee that you wont hear the same message repeated twice
or more times.
SQUEAKING BRAKE SOUNDS
ProtoSound® equipped engines feature the ability to play the sound of squeaking brakes
whenever your engine slows in speed or enters a sharp curve. There are two settings for
activating the squeaking brake sounds. The default setting allows the brake sounds to play
while the engine is in forward or reverse and the transformer throttle is lowered from a high
setting to a low setting (14 volts to 8 volts or less). The second setting requires that a bell
button be used to arm the brake feature and is explained in more detail in the Activating
Freight Yard Sounds section found later in this manual. The sound itself is a stored record on
the ProtoSounds® software chip and will always play the same brake sound for the same three
second length each time the voltage is
reduced from high to low. Some
practice may be required to
synchronize the playing of the brake
sounds with the movement of the
engine. It is not uncommon for the
engine to stop before the brake sound is
completed. Operators will find that by
coordinating the movement of the
throttle setting from 8 volts to off will allow the engine to maintain its movement while the
brake sounds play.
Note: The brake sounds will not be heard if the transformer throttle is not
set above 14 volts and/or not reduced below 8 volts.
Squeeek
Throttle Down From
High Voltage To Low
Listen For The
Squeaking Brake Sounds
