Dalsa Piranha HS 4x-02K30, User Manual

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22 Piranha HS 4x User’s Manual
03-32-10040-03 PRELIMINARY DALSA Corp.
Setting Line Rate and Exposure Time
The camera’s line rate (synchronization) is generated internally through the software
command
ssf
when operating in mode 7, or set externally when operating in mode 3. To
select how you want the camera’s line rate to be generated:
1. You must first set the camera mode using the
sem
command. Refer to section 3.7.1
Setting the Exposure Mode for details.
2. Next, if using mode 7, use the command
ssf
to set the line rate. Refer to section 3.7.2
Setting Line Rate for details.
3.7.1 Setting the Exposure Mode
Set Exposure Mode Command
To set the exposure mode, use the command:
Syntax:
sem i
Syntax Elements:
i
Exposure mode to use. Factory setting is 7.
Notes:
•
Refer to Table 6 for a quick list of available modes or to the
following sections for a more detailed explanation.
•
To obtain the current value of the exposure mode, use the
command
gcp .
Related Commands:
ssf
Example:
sem 3
Exposure Modes in Detail
Mode 3: External Trigger with Maximum Exposure
Line rate is set by the period of the external trigger pulses. EXSYNC pulses faster than the
read out time are ignored. The falling edge of EXSYNC marks the beginning of the
exposure for the next line.
Example 1: Mode 3 Timing
Exposure Time
Exposure Time
Line Period
Line Period
EXSYNC
Ignored
EXSYNC Ignored
EXSYNC
Readout
Readout