Basics of Programming
motor shaft when a read or write command is given.
If your DSD is otherwise working properly (i.e., responds properly on the mainline to speed and direction commands) but your command station is having troubles reading CV data from the DSD, it may be due to incompatibilities between the electrical requirements of the DSD (which are different from conventional decoders due to the added audio circuitry) and the electrical characteristics of your programming track. In such an event, we suggest you simply go ahead and program the data into the CVs anyway. Usually the DSD will accept the data and function properly when placed back on the main track.
Another option is to use a Programming Track Booster, such as SoundTraxx PTB-100 (P.N. 829002). The PTB-100 amplifies the programming track signals to levels that work best with Tsunami. It is easy to install (see below) and inexpensive. An advantage to using the PTB-100 is that it also provides short circuit detection and some helpful diagnostics. It works well with all other SoundTraxx decoders, too.
COMMAND STATION POWER SUPPLY
BLACK BLACK ORANGE ORANGE YELLOW YELLOW
Power In Power In
Programming Track Output Programming Track Output
To Programming Track
Figure 1 - General Wiring Diagram for the SoundTraxx PTB-100
Finally, if you continue to experience difficulties, try a different programming mode. If your system supports it, the best way to program the CVs is Operations Mode, as it allows you to immediately see or hear the results of your changes. It is important, however, to realize that not all programming modes will program all CVs. Additionally, the specific programming mode you use will depend upon the type of DCC system you are using. Some of the newer DCC systems can automatically select the proper programming mode so all you need to do is specify the CV number and its new value. On the other hand, some systems support only a few of the programming modes and may restrict which CVs you can program. If in doubt, refer to your DCC system’s manual or contact the manufacturer to determine which methods they support.
Tsunami Steam Sound User’s Guide