Manual Controls
COARSE GAIN - Eight-position rotary switch selects gain factors of x5, x10, x20,
x50, x100, x200, x500, x1000.
FINE GAIN - Ten-turn locking dial precision potentiometer selects variable gain fac
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tor of x0.5 to x1.5; resettability = 0.03%.
SFG (Super Fine Gain) - Multi-turn screwdriver potentiometer adjusts fine gain with a
resolution of better than 0.0063%.
P/Z (Pole/Zero) - Multi-turn screwdriver adjustable pole/zero matching potentiometer
optimizes amplifier baseline recovery and overload performance for the preamplifiers
fall time constant and the amplifiers chosen shaping time; range: 40 µs to ∞.
SHAPING MODE (2016A) - Six-position rotary switch provides 0.125, 0.25, 0.5, 1, 2,
and 3 µs shaping time constant.
SHAPING MODE (2016B) - Six-position rotary switch provides 0.25, 0.5, 1, 2, 4, and
6 µs shaping time constant.
ICR THRESH - Multi-turn screwdriver potentiometer adjusts PUR threshold to opti-
mize pile-up selection; active in manual PUR threshold mode.
Computer Controls
SCA Window centroid and width; PUR enable/disable; TCA enable/disable and polar
-
ity; PUR threshold auto/manual.
Performance
GAIN RANGE - Continuously variable from x2.5 to x1500.
TEMPERATURE STABILITY - AMP OUT Gain: 0.005%/°C, dc level: 7.5 V/°C.
INTEGRAL NONLINEARITY - 0.04% over total output range for 2 µs shaping.
OVERLOAD RECOVERY - AMP OUT output recovers to within 2% of full scale
output from x1000 overload in 2.5 non-overloaded pulse widths at full gain, at any
shaping time constant, and with P/Z properly set.
34
Specifications
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