Digitrax SDN144K1E Руководство пользователя - Страница 4
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trolytic energy storage capacitor will not fit inside the frame and shell. For
other locomotives it may be possible to create space to accept this capacitor.
Solder the capacitor terminals to the marked pads in Figure 4. Be sure that
the capacitor case and leads do not short to the frame or damage to the
decoder may result. A smaller capacitor with at least 16V rating for 12V N-
scale track voltages may be used, if desired.
6. Inspect the installation before testing the sounds and replacing the shell. In
particular Ensure motor clips make proper contact with the motor tabs
and do not short to the frames.
7. Connect to active DCC track power from a compatible DCC system and
select the factory default address 03 to enable sounds for testing
8. Be sure F8 (mute) is OFF to allow sound output, and then press F1(bell) or
F2 (whistle/horn) ON to hear these associated sounds.
9. Customize sounds by programming Sound CV's to adjust the desired con-
figurations, as shown in the following tables of Sound FX CVs. CV60=0
sound scheme is an SD40-2 and CV60=1 is an GE-Evo. Other locomotives
may be downloaded from the Digitrax web site and conveniently pro-
grammed using a PR3 programmer. This "K1" form-factor PCB may be
used in a number of other N scale locomotives by applying a little modeling
ingenuity.
Speaker Mounting and baffle or enclosures.
The sound performance of any attached speaker(s) is greatly affected by the
mounting system and required baffle or rear enclosure space. Depending on
the locomotive model and construction and speaker chosen it may be necessary
to modify the frame or parts of the internal shell to make room for one or more
speakers and enclosure.
For the Kato N scale SD40-2 installation shown here the whole body acts as a
sound baffle. Obviously the space inside this N-scale locomotive is limited
since the frame is configured for maximum weight and pulling effort, and the
installation shown here is just one variation of the possible locations for a
speaker.
The baffle is used to isolate the speaker diaphragm front sound waves from the
"out of phase" rear sound waves. This minimizes sound cancellation, particu-
larly at lower frequencies. For most efficient sound generation, the cubic space
of the baffle should be as large as practically possible, and the baffle walls
should be acoustically rigid so not to allow acoustic interference. be sure that
there is a tight seal from the speaker sides to the wall of the baffle. In this
example the speaker should fit snugly in the mount hole. Of course, you can
substitute an alternate after-market speaker of the maximum size for the loco-
motive you have. For example, you can wire in the SDN144K1E in a modern
HO-scale locomotive with a high-efficiency can style motor as long as the stall
current is less than 1 amp at the track voltage in use. In this case it is possible
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