CHEETAH Hardware User’s Manual
Imperx, Inc.
Rev. 6.2
6421 Congress Ave.
7/7/2015
Boca Raton, FL 33487
+1 (561) 989-0006
34 of 152
2.1.2
Dual Video: Frame A / Frame B Switching Options
The cameras provides several options for switching between Frame A and Frame B
(Dual Video).
Manual
Automatic
Triggered
Manual switching
uses the computer software to switch between Frame A and
Frame B.
Automatic switching
: The camera outputs a user defined number of frame As
(‘M’ frame As) followed by a user defined number of Frame Bs (‘N’ Frame Bs)
with this sequence repeated continuously. For example, the camera can be
programmed to output one Frame B for every sixty (60) Frame A’s. The camera
can be programmed to provide up to two hundred fifty-six (256) Frame “A’s”
followed by two hundred fifty-six (256) Frame “B’s”. The camera continues to
output ‘M’ Frame As followed by ‘N’ Frame Bs continuously.
Triggered Switching
: There are two dual video triggered modes: Dual Video
and Dual Video Triggered.
Frame A / Frame B:
With trigger enabled and in Frame A or Frame B
mode, the camera captures one frame of the selected Frame A or Frame
B and outputs it on each trigger.
Dual Video
: With the trigger enabled and Dual Video selected, the
camera waits for trigger. On receipt of trigger, the camera outputs a user
selected number (‘M’) Frame As followed by a user selected number
(‘N’) Frame Bs then waits for trigger.
Dual Video Triggered
: With trigger enabled and Dual Video Triggered
mode selected, the camera outputs Frame As continuously until a trigger
is received. Upon receipt of trigger, the camera outputs a user defined
number (‘N’) of Frame Bs then returns to outputting Frame As awaiting
the next trigger pulse. Valid Trigger sources as described in the Section
2.6: External Trigger.
2.2 GLOBAL VS ROLLING SHUTTER
The camera supports both rolling and global shutter operational modes. In global shutter
operational mode, all lines (and all pixels) within the imaging array are reset at the same
time and then exposed. Readout follows exposure and lines are readout of the array