CM-140 GE / -RA/-UV / CB-140GE/-RA
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9. Functions and Operations
9.1. Basic functions
The CM-140GE/CM-140GE-RA, CB-140GE/CB-140GE-RA and CM-140GE-UV cameras are
progressive scan cameras with 10 or 8-bit video output in Gigabit Ethernet. An analog iris
video signal (DIP switch select) can be used for controlling auto-iris lenses. The camera has
1/2, ¼, 1/8, or 2/3 partial scanning for faster frame rates. Vertical binning is also
available.
The camera can operate in continuous mode as well as in 5 triggered modes:
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Edge Pre-Select (EPS)
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Pulse Width Control (PWC)
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Reset continuous (RCT)
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Sequential trigger (EPS)
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Delayed readout (EPS and PWC)
Depending on the timing of the trigger input in relationship to FVAL (camera internal Frame
Valid clock), the start of exposure can be immediate (no-delay, LVAL asynchronous) or
delayed until next LVAL (LVAL synchronous).
In the following section these functions are described in detail.
9.2. Electronic shutter
In the GenICam SFNC interface, the electronic shutter is set by Exposure time
(microseconds). The traditional JAI method for shutter setting can also be used including
JAI Shutter Mode, JAI Preset Shutter, JAI Exposure Time Raw and JAI Exposure Time (us).
If setting is done using the SFNC method, these settings are automatically reflected in the
traditional JAI settings area.
Preset shutter
10 preset shutter steps are available: OFF (1/31); 1/60, 1/100; 1/250; 1/500; 1/1,000; 1/2,000;
1/4,000; 1/8,000; 1/10,000 sec.
Note: CM-140GE-UV: OFF (1/16); 1/30, 1/60, 1/100; 1/250; 1/500; 1/1,000; 1/2,000; 1/4,000;
1/10,000 sec.
Programmable shutter
It is possible to set the shutter speed in the range of 2L to 1052L by 1L unit, in case of Full Frame
operation. When 1052L is set, it is the equivalent of “OFF (1/31)“ or 32.17ms.
Minimum Shutter Time 2L
Maximum Shutter Time
Normal
30.584µs(1L) * 2 = 61.168µs
30.5844µs * 1052L≈ 1 Frame (32.174 ms)
V Binning
38.83µs * 2L = 77.66µs
38.83µs * 527L ≈ 20.46ms
