Dalsa Pantera TF 11M4, User Manual

Page: 27 / 68

Pantera TF 11M and 6M User’s Manual Preliminary 27
DALSA 03-32-10096-03
Mode 4: Smart EXSYNC, External Frame Rate and
Exposure Time
In this mode, the external trigger rate sets both the frame rate and the exposure time. The
rising pulse of the external trigger marks the beginning of the exposure time. Readout
begins on the falling edge of EXSYNC. A charge dump occurs at the beginning of the
exposure time, clearing any accumulated charge gathered up to this point. An external
shutter or strobe should be used to remove light during readout
Figure 14: Mode 4 Timing
Exposure Time
EXSYNC
CD
CD
=Charge
Dump (~100µs)
Waiting
No Light
Triggers ignored
during readout
Frame Period
Mode 6: External Frame Rate and Internal Exposure
Time
In Mode 6, EXSYNC sets the frame rate but the exposure time is set internally using the
software command,
set
(described on page 28). The exposure time begins with a charge
dump that clears all charge accumulated until this point. To prevent image smearing, you
should use an external shutter or strobe to prevent light exposure during the readout
period.
Figure 15: Mode 6 Timing
Readout
Exposure Time
(set internally)
EXSYNC
CD
CD
=Charge
Dump
(~100µs)
Waiting No Light
Triggers
ignored
Frame Period
during readout