Piranha HN RoHS User Manual
03-032-20135-00
Teledyne DALSA
28
Exposure Mode and Line/Frame Rate
How to Set Exposure Mode and Line/Frame Rate
You have a choice of operating the camera in one of two exposure modes. Depending on your mode of
operation, the camera’s line/frame rate (synchronization) can be generated internally through the
software command
ssf
or set externally with an EXSYNC signal (CC1). When operating in TDI Mode, it
is important that the line rate used matches the web speed. Failure to match the web speed will result in
smearing.
To select how you want the camera’s line/frame rate to be generated:
1. You must first set the camera’s exposure mode using the
sem
command.
2. Next, if using mode 7, use the command
ssf
to set the line/frame rate.
Setting the Exposure Mode
Purpose:
Sets the camera’s exposure mode allowing you to control your sync and line/frame rate
generation.
Syntax:
sem m
Syntax Elements:
m
Exposure mode to use. Factory setting is
7
.
Notes:
•
To obtain the current value of the exposure mode, use the command
gcp
or
get
sem
.
•
When setting the camera to external signal modes, EXSYNC must be supplied.
•
Refer to
Setting Frame Rate
for more information on how to operate your camera in
TDI or Area Mode.
•
Exposure Modes are saved separately for TDI Mode and Area Mode. Refer to
Saving and Restoring Settings
for more information on how to save camera settings.
Related Commands:
ssf
Example:
sem 3
Table 7: Piranha HN Exposure Modes
Programmable Frame Rate Programmable Exposure Time
Mode SYNC
Description
3
External
No
No
Maximum exposure time with no charge reset.
7
Internal
Yes
No
Internal sync, maximum exposure time with no charge reset.
