Teledyne Princeton Instruments PI-MAX 3, System Manual

Page: 88 / 250

88 PI-MAX
®
3 System Manual Issue 2
• Image Shift {Shifting Under Mask}
This level is at a logic high while the image is being shifted under the mask.
• Logic 1 {Always High}
The level at the connector is high.
• Read Out {Reading Out}
It is at a logic high when CCD is being read; otherwise low.
• Shutter {Shutter Open}
This level is at a logic high when the photocathode is gated on (signal is
accumulating on the CCD) and can be used to drive an external
electro-mechanical shutter. Contact the factory for more information.
• Wait for Trigger {Waiting For Trigger}
This level is at a logic high when the camera is ready to acquire and is waiting
for an external trigger (through the EXT SYNC connector) before exposing the
CCD. The level goes low when a trigger is detected: exposure begins. The Wait
for Trigger (WFT) signal goes high immediately after readout or after preopen (if
it is active). If continuous cleans is enabled, the camera will check for a trigger at
the EXT SYNC connector before entering a continuous clean cycle. If none has
occurred, a cleaning cycle is initiated and completed. Before the next cycle
begins, the EXT SYNC connector is checked again, and exposure will start if a
trigger has occurred.
When the Invert LOGIC {Invert Output Signal} check box is checked, the output is at a
logic low when the action is occurring.