Page 52 Non-Sound Decoder MX618 - MX638 and Sound Decoder MX640 - MX659
CV
Denomination
Range
De-
fault
Description
#339
Key for raising diesel
sound step
0 - 28
0
Function key that raises the diesel sound to the minimum
speed defined with CV #340.
See below if more keys for further speed raises are required.
#340
Diesel sound step
and possibly more
keys.
0 - 10
0
The minimum diesel step the sound is to be raised to with the
function key defined with CV #339.
This CV can be extended (to include more function keys (in
succession) by applying the formula:
Minimum speed step + (16 * (Number of keys -1))
5.8 Random and Switch Input sounds
CV
Denomination
Range
Default
Description
#315
Random generator
Z1
Minimum interval
0 - 255
=
0 - 255 sec
1
The random generator generates internal pulses in irregu-
lar intervals that are used to playback a sound file assigned
to the random generator. CV #315 defines the shortest
possible interval between two consecutive pulses.
Sound samples are assigned to the random generator Z1
with the help of the CV #300 = 101 procedure, see above!
By default, the compressor is assigned to Z1.
Special note to random generator Z1:
The random generator Z1 is optimized for the compressor
(which should be played back shortly after the train has
stopped); therefore the default assignment should be re-
tained or at the most be used for a different compressor.
CV #315 also determines the proper time the compressor
is started after coming to a stop!
#316
Random generator
Z1
Maximum interval
0 - 255
=
0 - 255 sec
60
CV #316 defines the maximum time interval between two
consecutive pulses of the random generator Z1 (that is
most often the start of the compressor after coming to a
stop); the actually occurring pulses between the values in
CV #315 and #316 are equally distributed.
#317
Random generator
Z1
Playback length
0 - 255
=
0 - 255 sec
5
The sound sample assigned to the random generator Z1
(most often the compressor) is played back for the
timespan defined in CV #317.
= 0: Sample plays once (in the defined duration)
#318
#319
#320
As above but for
sound generator Z2
0 - 255
0 - 255
0 - 255
20
80
5
By default, Z2 is assigned for coal shoveling at stand-still.
#321
#322
#323
As above but for
sound generator Z3
0 - 255
0 - 255
0 - 255
30
90
3
By default, Z3 is assigned for the injector at stand-still.
#324
As above but for
0 - 255
As delivered, this random generator is not assigned to any
#325
#326
sound generator Z4
0 - 255
0 - 255
sound.
#327
#328
#329
As above but for
sound generator Z5
0 - 255
0 - 255
0 - 255
As delivered, this random generator is not assigned to any
sound.
#330
#331
#332
As above but for
sound generator Z6
0 - 255
0 - 255
0 - 255
As delivered, this random generator is not assigned to any
sound.
#333
#334
#335
As above but for
sound generator Z7
0 - 255
0 - 255
0 - 255
As delivered, this random generator is not assigned to any
sound.
#336
#337
#338
As above but for
sound generator Z8
0 - 255
0 - 255
0 - 255
As delivered, this random generator is not assigned to any
sound.
#341
Switch input 1
Playback duration
0 - 255
=
0 - 255 sec
0
The sound sample allocated to switch input 1 is played
back for the duration defined with this CV.
= 0: Play back once (duration as recorded)
#342
Switch input 2
Playback duration
0 - 255
=
0 - 255 sec
0
The sound sample allocated to switch input 2 is played
back for the duration defined with this CV.
= 0: Play back once (duration as recorded)
#343
Switch input 3
(if not used for the
cam sensor)
Playback time
0 - 255
=
0 - 255 sec
0
The sound sample allocated to switch input 3 is played
back for the duration defined with this CV.
= 0: Play back once (duration as recorded)
6
Installation and Wiring
General information:
There has to be enough
free space inside the vehicle
so that the decoder can be mounted without
exerting mechanical stress. Pay particular attention that no pressure is applied to the decoder when
the loco housing is being reinstalled
and the wires can’t get caught by movable parts.
All direct connections that are present in the original wiring configuration between the power pick-ups
(wheels and wipers) and the motor
must be isolated;
otherwise the motor end stage may get dam-
aged at power-up.
The same goes for the
headlights and other additional accessories,
which must be completely iso-
lated.
Do noise suppression components on a locomotive motor have
a negative effect on motor regulation?
Yes, sometimes . . .