SoundTraxx Tsunami Steam Users Guide - Manual (Page 21)

Tsunami Steam Sound User’s Guide Page 18
larger values for these CVs; we therefore suggest setting CV 3 and CV 4 to a
minimum value of 16 or higher.
If you are using 14 or 28 Speed Step modes, setting CV 3 and CV 4 to any
value greater than 0 will also improve the Tsunami’s throttle response. While
it is accelerating or braking, Tsunami interpolates between speed steps so
in effect, your locomotive will respond as if it were being controlled with 128
speed steps. No more sudden lurching from one speed step to another!
Select the Speed Table
Tsunami provides 14 preset and one loadable speed table that can be used
for several purposes:
1. Matching the Auto Exhaust chuffing rate to locomotive speed.
2. Speed matching one locomotive to another.
3. Changing the feel of the throttle. For example, you could configure
a switching locomotive so there are more speed steps available at
lower speeds for switching and fewer steps at high speeds where the
locomotive is seldom operated.
4. Compensating for an improperly designed driveline so the locomotive will
operate within its prototypical speed range.
Preset Speed Tables
CV 25, Speed Table Select, is used to select which speed curve will be used
by the DSD. CV 25 may be programmed with any value between 2 and 15 to
select one of the preset speed curves shown in Table B, below.
Basic Programming
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CV 25 Speed Curve Type
Straight LIne
Logarithmic Curve 1
Logarithmic Curve 2
Logarithmic Curve 3
Logarithmic Curve 4
Logarithmic Curve 5
Logarithmic Curve 6
Logarithmic Curve 7
Exponential Curve 1
Exponential Curve 2
Exponential Curve 3
Exponential Curve 4
Exponential Curve 5
Exponential Curve 6
User Loadable Speed Table
Table B. Speed Table Selection
100%
75%
50%
25%
0%
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
LOG
7
LOG
5
LOG
6
LOG
3
LOG
2
LOG
1
LOG
4
LINEAR
EXP
1
EXP
2
EXP
3
EXP
4
EXP
5
EXP
6
Speed Step
Motor Speed