Teledyne Princeton Instruments PI-MTE, System Manual

Page: 57 / 118

Chapter 5 Operation 57
Once you have entered the acquisition parameters, wait for temperature lock to occur
and then wait 30 minutes for the camera temperature to completely stabilize. Then try
taking a few dark charge readings.
NOTES:
1. Do not be concerned about either the DC level of this
background or its shape unless it is very high, i.e., >400
counts. What you see is not noise. It is a fully
subtractable readout pattern. Each CCD has its own
dark charge pattern, unique to that particular device.
Every device has been thoroughly tested to ensure its
compliance with Teledyne Princeton Instruments'
demanding specifications.
2. Do not adjust the offset values to zero or some
low-level data will be missed.
CAUTION!
!
If you observe a sudden change in the baseline signal, TURN
OFF THE SYSTEM IMMEDIATELY and contact the factory
Customer Support Department. Refer to
Contact
Information on page 116 for complete contact information.