Difference between revisions of "CV 138"

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Revision as of 21:47, 16 July 2021

CV 138
Throttle Mode Selection
Range of Values0-2
Accepted Values0-2
Default Value1 (Varies)

NMRA CV 138 - Throttle Mode Selection

There are 3 different throttle modes in the WOWSound decoder to choose from, TCS offers Traditional Throttle Mode (slot car mode), Prototype Mode, and Manual Notching. Each mode offers different levels of control and prototype authenticity. The WOWDiesel decoder defaults to Prototype Throttle mode which gives the most prototypical performance by taking advantage of TCS's revolutionary Proto-Notch™ technology.

The easy way to select a throttle mode is to use menu 4.1 of Audio Assist™.
Additionally this CV can be manually programmed by entering the value of the desired throttle mode into CV147

Throttle Mode Value
Traditional Throttle mode 0
Prototype Throttle Mode 1
Manual Notching Mode 2

Traditional Throttle Mode

Traditional throttle mode is how sound decoders of the past would "traditionally" operate, where the chuff intensity was one constant volume, or the prime mover notch is related directly to the speed. E.G. every (n) speed steps (of 128 speed steps) is a different notch, so the faster you go the higher the notch you will be in.

See the video below for a demonstration of Traditional Throttle Mode:

Configuration Options

Traditional throttle mode can be selected though and can be selected using Audio_Assist® menu 4.1. Both WOWSteam and WOWDiesel support Traditional Throttle Mode.

(WOWDiesel ONLY): The speed setpoints that the prime mover changes notches are controlled by CV165 through CV172 - where CV165 controls when the locomotive goes into Notch 1 and CV172 controls what speed step the locomotive goes into Notch 8.

(WOWSteam ONLY): To adjust the volume of the Chuff while in Traditional Throttle Mode, you need to change the volume level for the sound type "Chuff." This can be done easily through Audio Assist®. Note that making this change to the Chuff volume type will affect the maximum volume that the Chuff can reach when in Prototype Throttle Mode.

Other Traditional Throttle Mode Features

When you select Traditional Throttle Mode, the momentum values are set to the "Switching Momentum" values stored in the decoder as part of the Momentum Modes feature. The Switching Momentum values are typically low momentum values which disregard realism in favor of a "snappy" and "slot-car-like" operating experience which closely ties the speed of the locomotive to the speed on your handheld throttle. While it is still possible to slow down your locomotive using the Train Brake, it is not a requirement with Traditional Throttle Mode. That said, you can use the Momentum Modes feature to switch back to Mainline Momentum in case you only want to have the notching or chuff intensity be constant but the momentum be realistic.

Prototype Mode

Auto Notching

Manual Notching

Manual Notching