SoundTraxx Tsunami Steam Technical Reference - Manual (Page 11)

Tsunami Technical Reference Page 9
CV 12
Power Source Conversion
Description
Defines the type of power source the decoder should switch to whenever a
DCC signal is not present and the APS bit of CV 29 (bit 2) is set.
D0-D7: Alternate Power Source
0 = No Alternate Power Source Available
1 = Analog Power Supply
Default value: 1
Primary CVs
Bit 7 Bit 0
D7 D6 D5 D4 D3 D2 D1 D0