operation and a long-life cycle. Use only loudspeakers with at least 1 Watt capacity. The basic rule says: the
play back quality of a loudspeaker grows with the capacity.
4.5.RPM control, control in- and outputs
The synchronization of the sound with the rotation of the wheels can be achieved with a pulse generator or by
speed steps. CV195 defines the method used. Setting CV195 to “0“ defines the speed steps to be the
controlling parameter for the sound.
A pulse generator contains multipolar magnets. Regularly the magnet rings have 4 north poles and 4 south
poles. CV195 defines how many poles need to be recognized for one cycle of the sound (e.g. steam chuff)
Steam locomotives:
0 = Control by speed steps
1 = one chuff per pole
2 = one chuff per two poles
4 = one chuff per four poles
Diesel locomotives and Electric locomotives:
0 = Control by speed steps
1 = Control by pulse generator (wheel sensor)
CV196 and CV198 apply for steam locomotives only. CV196 sets the duration of the steam chuff, range 0 to 32.
This relates to a time frame between 32 msec to 1.28 sec. CV198 defines the pause time between steam chuffs
(in relation to the duration of the chuffs).
In addition track magnets may trigger sounds. The sound assignment is set in CVs 190 and 191.
4.5.1. Triggering whistle and bell by reed contacts
Track magnets may be utilized to trigger sounds (max. two). Two reed contacts must be connected to GND and
potential-free to the respective input terminals of the eMOTION XLS sound decoder. The CVs 190 and 191
define the sounds to be triggered by the reed contacts. A very special function is the sound triggering
depending on the driving direction. This is set in CV149 by activating Bit 4.
4.5.2. Trigger output for the pulsed smoke generator
The F3 output may be set to operate as a trigger output for the pulsed smoke generator in case a real pulse
generator is not available. For this purpose CV114 must be set to „30“. Connect the wire described in the
smoke generator manual to F3. The pulsed smoke generator will then operate synchronized to the chuffs
produced by the XLS.
5.Explanation of basic CV settings
5.1.Locomotive address
As mentioned in “ A brief introduction into digital control” above, each locomotive operated by the NMRA/DCC
standard needs a digital address to receive its specific command.
•
The NMRA standard provides two kinds of addresses:
- Low (short) addresses (1…127)
- High (long) addresses (128…10239)
•
The address must be stored in the decoder to enable the decoder to recognize the commands that are meant
for it.
eMOTION XLS Sound Decoder 18