![background image](http://html1.mh-extra.com/html/phoenix/bigsound-pb17/bigsound-pb17_handbook_1551288012.webp)
Start Voltage Adjustment
If you ordered a sound system to match your locomotive you can usually
skip this step.
The Starting Voltage is the voltage at which the train begins to move and the
sound changes from idle to running. In trigger mode there are some sounds that
play based upon the starting voltage, even though voltage does not determine
speed. To adjust the starting voltage you will need to enter configuration mode.
1. Make sure sound system is off.
2. Connect together terminals P4:1 and P4:3 (yellow and black
wires). This can be easily done by inserting a 2.5mm MONO plug
(“shorting plug”) into the access jack.
3. Make sure that the options you wish are also selected (see chart on
page 9, refer to previous Option Selection Examples if necessary).
4. Apply power to terminals 1 & 2. The board will make sound at a
preset low volume.
5. Now you are in configuration mode for Starting Voltage.
6. At this point, the volume switch will adjust the starting voltage.
For each second you hold the switch, the starting voltage will adjust 1
volt in the direction you are holding it. Volume Up increases the start
voltage while volume down decreases.
7. Test your locomotive with the new settings before shutting it
down. You will be in configuration mode and be able to adjust the
starting voltage until the system is shut down.
8. When you are satisfied with the settings let the system run for at
least 20 seconds before powering down. The system will not save the
changes until they have been stable for 20 seconds.
9. If you set the Starting Voltage too near zero, the system will never
idle and will not shut down until the battery is depleted. If the system is
not shutting off, nudge the volume switch in the raise position to
increase the setting from zero. If the battery is removed or drained
while in the never shut down condition, it is very difficult to recover
without the computer interface.
10. When you power your system back up, your starting voltage
should be adjusted to your setting of choice and the volume switch will
be back in normal mode and control your sound volume.
Rate Adjustment
The Rate is the relationship between voltage and train speed. To adjust the
Rate follow the above EXCEPT remove the shorting plug after power up. The
volume switch now adjusts the Rate, allowing you to match the operating
characteristics of the engine.
January 2018
- 12 -
Summary of Contents for BigSound PB17
Page 19: ...Basic DC January 2018 19 3 6V Battery Track Bell Trigger Speed Trigger Whistle Trigger ...
Page 20: ...Basic DCC January 2018 20 Track Speed Trigger ...
Page 21: ...CVP Airwire 900 G3 January 2018 21 Speed Trigger Main Battery M ...
Page 24: ...G Scale Graphics RailBoss 4 January 2018 24 Main Battery Bell Horn Whistle Speed Trigger ...