Perform the following steps to set up your spectroscopy system:
1.
Insert the Model 9660 Digital Signal processor into a Model 2100 or
equivalent NIM Bin.
2.
Connect the intended Detector/Preamp to the 9660. Preamp power is
provided by means of a 9-pin Amphenol connector located on the rear panel
of the Model 9660. Connect the Preamp Output signal to the 9660 INPUT
BNC. If the detector preamp is a reset type, connect the Inhibit Output signal
to the Inhibit Input on the rear of the 9660.
Note
Multiple ground connections to the detector preamp (preamp power, signal
BNC cable, HV power supply cable, etc.) can setup ground loops which may
be sensitive to EMI noise pickup. These effects can cause resolution degrada-
tion, excessive dead time and erratic count rate (ICR) measurement.
If you experience any of these problems, make sure the preamp cables are
tightly bundled together and routed away from EMI noise sources such as mo-
tors, AC switching equipment, computers, monitors, etc.
If necessary, use the optional LB1500 Loop Buster provided with the 9660 in
series with the preamp signal cable. The LB1500 Loop Buster reduces the sen-
User’s Manual - ICN 9231014G
35
Spectroscopy System Setup
Figure 19 Typical Gamma Spectroscopy System
