preamp matching misadjustment, which exhibit a much longer time constant
and have a larger performance impact.
At high count rates, P/Z matching misadjustment will affect spectral peak shape and
resolution.
User’s Manual - ICN 9231014G
43
Detector Matching
Figure 21 Correct Pole/Zero Compensation
Scope:
Vertical: 50 mV/div
Horizontal: 10
µ
s/div
Source:
60
Co
1.33 MeV peak at 6 V amplitude
Count rate: 2kcps
Shaping: 5.6
µ
s rise time
0.8
µ
s flat top
Figure 22 Undercompensated Pole/Zero
Scope:
Vertical: 50 mV/div
Horizontal: 10
µ
s/div
Source:
60
Co
1.33 MeV peak at 6 V amplitude
Count rate: 2kcps
Shaping: 5.6
µ
s rise time
0.8
µ
s flat top
