To set the SB5 to booster only mode:
1.Move the small switch on the bottom of the SB5 toward the rear of the box.
2. Connect a PowerCab or ProCab directly to the front of the SB5.
3. Press <PROG/ESC> followed by <5> to see the SET CMD STATION prompt on the LCD of the cab
4. Press <ENTER> repeatedly until you see “ENABLE BOOSTER”
*** note, if you are missing this part of the menu in your SB5, contact NCE for the latest firmware version 1.65B free of charge.
5. Press <1> to enable booster only mode
The status LED on the SB5 should start flashing rapidly indicating that there is no DCC signal present and the SB5 is now in Booster mode. The “Control Bus” jack on the front of the SB5 becomes a DCC signal input rather than a DCC signal output. Connect your DCC signal here. To return the SB5 to normal command station mode, just reverse the above process. (switch toward front of box, disable booster mode in SET CMD STATION).