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Decoder for Atlas N Scale H15/16-44 Locomotives 12
Atlas Model Railroad Co., Inc.
CV Description Range Default
Value
**
57
Bit 3
Not used 0
Bit 4 0 = No effect
1 = Rear headlight functions as Gyro light
0,1 0
(16)
Bit 5 0 = No effect
1 = Rear headlight functions as Mars light
0,1 0
(32)
Bit 6 0 = No effect
1 = Rear headlight functions as single pulse
Strobe light
0,1 0
(64)
Bit 7 0 = No effect
1 = Rear headlight functions as double pulse
Strobe light
0,1 0
(128)
Notes for CV57:
Bits 4 to 7 of CV57 are effective if and only if CV51.0=1.
Dimming is inactive if any of bits 4 to 7 are set to “1.”
If more than one of Bits 4 to 7 of CV57 is set to “1,” only the highest
numbered of these bits is effective.
58
Dimming for Output B (rear headlight)
The value in CV58 is used to dim the rear headlight.
Using the value “0” for this CV results in a completely
dark rear headlight, when it is dimmed.
Using the value “255” keeps the rear headlight at its
maximum possible brightness, even when dimmed.
67
to
94
Speed Step Values for Customized Speed Curve
These CVs are used to specify the speed step
values for a customized speed curve. The factory-
default values for these CVs are specified in Table 2
in the section Creating a Customized Speed Curve.
0-255
Factory
Default
Speed
Step
Values
128 Decoder Software Version – read only
1
* The notation CVx.y = z means that bit y of CVx has the value ”z”. For
example, CV29.2 = 0 means that bit 2 of CV29 has the value ”0.”
** In the Default Value field, the numbers shown in parenthesis () are the
decimal values that must be written into a CV for the specified bit of that
CV to have the binary value “1”.