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There is a bug in the single A/B trigger mode in some camera revisions (see Ap-
pendix B, A/B Trigger Bug). In this case when the encoder position moves back
and forth by a small amount, the EncoderCounter is incremented and the decre-
ment is sometimes omitted, leading to a wrong EncoderPosition indication in
the camera. Therefore the single A/B trigger mode should not be used in the
affected versions. To have the same behaviour as the single trigger mode, but
without the bug, use the double A/B mode and double the value of ABTriggerDi-
vider.
)
B
0
G r a y C o u n t e r
0
E n c o d e r C o u n t e r
T r i g g e r F w d
T r i g g e r B k w d
T r i g g e r F w d B k w d
Figure 5.21: Single A/B Mode
)
B
G r a y C o u n t e r
0
E n c o d e r C o u n t e r
0
T r i g g e r F w d
T r i g g e r B k w d
T r i g g e r B k w d
Figure 5.22: Double A/B Mode
)
B
0
G r a y C o u n t e r
0
E n c o d e r C o u n t e r
T r i g g e r F w d
T r i g g e r B k w d
T r i g g e r F w d B k w d
Figure 5.23: Quad A/B Mode
.
5.2 Trigger and Strobe
1
2
3
0
1
2
1
2
1
2
3
0
1
2
1
2
3
1
2
3
0
1
2
1
2
3
4
5
6
3
2
1
0
3
1
0
3
2
1
0
3
4
3
2
3
2
1
0
3
7
6
5
4
3
2
1
2
3
0
2
1
2
3
0
1
2
2
1
2
3
0
2
1
2
3
4
1
1
1
3
1
5
61
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