15. Identify the equipment such as detector, electronics modules and NIM bin.
Note down detector type, size, operating voltage and its polarity.
Read the manuals of NIM modules particularly input requirements and output specifications and its principle of operations.
Connect the circuit diagram as shown in Figure.
Apply high voltage to the preamplifier.
Connect the amplifier out put to an oscilloscope.
Ensure that the detector power supply has the same polarity as the detector voltage polarity, otherwise change the polarity on the power supply.
Switch on the detector power supply and apply the detector voltage.
Watch amplifier signal on the oscilloscope. You may not see the signal on the oscilloscope.
Now place a gamma ray source near the detector. You will see the amplifier unipolar or bipolar pulse accordingly selected by you.

16. Differential Spectrum Measurement
Integral Spectrum Measurement

17. Differential and Integral Pulse Height Spectroscopy:
Det.
Preamp
Amplifier
Lin. Gate &Stretcher
MCA
Power
Supply
SCA
Counter