GO-5000M-USB / GO-5000C-USB
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8.2. Exposure settings
This section describes how to set the exposure settings.
8.2.1 Exposure Mode
The exposure mode can be selected from the following three methods.
Table -15 Exposure mode
Exposure Mode setting
Exposure operation
OFF
No exposure control (free-running operation)
Timed
Exposure operates at the value set in Exposure Time. Setting value is usec unit.
・
If Trigger Mode setting is OFF, the camera is in free-running operation.
・
If Trigger Mode setting is ON, the exposure operation depends on the setting of
Trigger Option.
Trigger Width
The exposure is controlled by the pulse width of the external trigger.
・
Trigger Mode is forced to ON.
For trigger operation, Exposure Mode must be set to something other than OFF and Trigger Mode of
Frame Start must be ON.
If Exposure Mode is set at Timed, the exposure operation can be selected as follows by setting
Trigger Option
Table – 16 Trigger option
Trigger Option setting
Exposure operation
OFF
Timed (EPS) mode
RCT
RCT mode, Refer to Chapter 8.7 for the details
The effect of the combination of Exposure Mode, Trigger Option and Trigger Mode is as follows.
Table – 17 The combination of Exposure Mode, Trigger Option and Trigger Mode
Exposure Mode
Trigger Option
Trigger Mode
(Frame Start)
Operation
OFF
N/A
N/A
Free-running operation
Exposure control by Exposure Time
is not possible
Timed
OFF
OFF
Free-running operation
Exposure control by Exposure Time
is not possible
ON
Timed (EPS) Operation
Exposure can be controlled by
Exposure Time
RCT
ON
RCT Operation
Exposure can be controlled by
Exposure Time
Trigger Width
N/A
ON
Exposure is controlled by the pulse
width of the external trigger
8.2.2 Exposure Time
This command is effective only when Exposure Mode is set to Timed. It is for setting exposure time.
The setting step for exposure time is 1
μ
sec per step.
Minimum:
10
μsec
Maximum:
8 seconds (Note – noise may make image unusable after 1 second)
