SoundTraxx Union Pacific Gas-Turbine Electric - Manual (Page 7)

Tsunami User’s Guide for the Union Pacific Turbine Page 4
Limiting feature (Bit 4, CV 116), the speed of the motor in the model will be
limited until the turbine has completed its startup sequence. Additionally, the
turbine cannot be turned off until the motor drops below the speed limiting
step.
Mode 4 - Semi Auto-notching Mode with Speed Limiter
This mode works like Mode 2 except that when F9 hasn’t been selected to
turn the turbine on, the decoder will only run as fast as the speed step value
assigned to it through CV 199.
CV 116 can be set between 1 and 15 to enable Automatic Engine Notching
Mode. Bit 4 in CV 116 must also be turned on.
CV 199 sets the maximum motor speed step while the interlock bit is set
(Bit 4, CV 116). The default value is 7 which equates to the being limited to
speed step 7 until the turbine is turned on. You can set a value from 0 to 127.
CV 200 Turbine Timeout enables the semi-automatic mode. If Bit 0 is set to
0, then the prime mover sound can be turned on using Function 9 and turned
off using Function 10, but all RPM notching is automatic according your
selection in CV 116.
For example, setting CV 116 to 21, CV 199 to a value of 10, and CV 200 to
a value of 0, you will be able to hear the diesel notch up and run the model
up to speed step 10. You’ll be able to turn the turbine on manually using F9,
and each time the throttle is increasesd by 5 speed steps, the turbine RPMs
will increase.
Mode 5 - Manual Notching with Speed Limiter
This mode works like Mode 3 but uses the interlock bit in 116 and CV 199
like Mode 4. As with Mode 4, the increase in speed will take place once the
Turbine is in its RPM notch mode after start up.
CVs Unique to the Union Pacific Turbine
The following CVs serve different purposes than the regular diesel Tsunami
or are unique to this decoder.
CV 112 Sound Configuration
CV 112 enables the Air Compressor and Fan as in most other diesel Tsunami
models. The Alternate Prime Mover selection bit allows you to choose to
have the diesel engine remain on when the turbine is on or to have the diesel
shut down during turbine operation, allowing you to represent all versions of
Gas-Turbine Electric locomotives found on the Union Pacific. This decoder
includes the added sound effect of the engine ‘backfire’. For those who either
saw these beasts in their heyday or have seen videos of past operations,
these backfires were spectacular, though relatively uncommon. It is an
impressive effect, however, and no Turbine would be complete without it!
Use the following table to determine your setting for CV 112 with the backfire
effect turned OFF. To have the backfire sound effect come on the first time
Operation