Page 29
New iStar ICCD
Figure 5: Rear & side views showing connectors interface
The user can synchronize the readout of the New iStar camera to external events / equipment by means of the SMA
receptacles. The functions of each are detailed below:
•
Ext Trig (External Trigger)
: TTL compatible input which is used to initiate data acquisition by the camera
•
Digital Delay Generator Outputs A, B & C:
Programmable 5V CMOS level outputs used to synchronize
external events / equipment with operation of the New iStar
•
Fire:
5V CMOS level reference signal relating to the CCD exposure time. This output remains high during the
charge / signal accumulation period, i.e. the time during which charge from the image area is not being read-out
•
Arm:
5V CMOS level reference signal to indicate when system is ready to accept external triggers. Signal goes
high when system is ready to accept external triggers after a readout sequence has finished, and goes low
when the exposure is finished
•
Direct Gate:
TTL compatible input used to directly gate the photocathode of the image intensifier tube, i.e.
switch it On and Off. The photocathode is On when the input is high. User should provide (electrical) pulse
width and appropriate gate pulse delay
•
Gate Monitor:
Enables user to monitor the accurate, actual On and Off switching of the photocathode
2.9 - CoNNeCtoRs
External
trigger
Output A, B, C
Direct gate
Arm monitor
Gate monitor
Water
connection
Power
connector
USB 2.0 (optional
lockable interface)
i
2
c
Earthing stud
On/Off switch
Introduction to the New iStar
