Multi-Protocol Operation
Analog Operation
This decoder can also be operated on analog layouts or
areas of track that are analog. The decoder recognizes
alternating current or direct current voltage (AC/DC) and
automatically adapts to the analog track voltage. All func-
tions that were set under mfx or DCC for analog operation
are active (see Digital Operation).
Digital Operation
The mSD3 sound decoders are multi-protocol decoders.
These decoders can be used under the following digital
protocols: mfx, DCC, fx (MM).
The digital protocol with the most possibilities is the highest
order digital protocol. The sequence of digital protocols in
descending order is:
Priority 1: mfx
Priority 2: DCC
Priority 3: fx (MM)
Note: Digital protocols can in uence each other. For trouble-
free operation, we recommend deactivating those digital
protocols not needed by using CV 50. Deactivate unneeded
digital protocols at this CV if your controller supports this
function.
If two or more digital protocols are recognized in the track,
the decoder automatically takes on the highest order digital
protocol, example: mfx/DCC; the decoder takes on the mfx
digital protocol (see previous table).
Note: Please note that not all functions are possible in all
digital protocols. Several settings for functions, which are
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supposed to be active in analog operation, can be done
under mfx and DCC.
Braking / Signal Stopping Block fx (MM), mfx, DCC
The braking module essentially applies DC voltage to the
track. If the decoder recognizes a DC voltage of this kind in
the track, it brakes with the delay that has been set. If the
decoder recognizes a digital protocol again, it accelerates
at the speed that has been set.
If automatic recognition in braking areas is to be used, we
recommend shutting the DC operation off (see CV descrip-
tion). In DCC operation setting the value in CV 27 to 16 or 32
(see CV table).
Automatic Calibration for All Protocols
• The type of motor must be selected (see CV 52) before
calibration.
• Automatic calibration of a locomotive must be done on a
suitable oval of track without obstacles (signals, grades,
etc.). We recommend an oval of track with curves larger
than 430 mm / 17" in radius. The locomotive is acceler-
ated to the maximum speed and can therefore derail on
smaller radius curves. Go into the locomotive con gura-
tion on the Central Station-> CV-> Info for automatic cali-
bration of the locomotive. In the eld Firmware Version,
overwrite the rst digit with 77. In the MM/DCC protocols,
overwrite the value shown in CV7 in the con guration
mode with the value 77 and store it in the locomotive.
Enter a speed with the speed control knob. Now the lo-
comotive starts slowly, accelerates to the fastest speed,
and then stops after a short while. After that, the locomo-
tive tries several times to start up. If the locomotive nally