Ametek ORTEC 480, Operating And Service Manual

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2
2. SPECIFICATIONS
2.1. PERFORMANCE
Temperature Stability 0.01%/
E
C, 0 to 50
E
C.
Line Voltage Stability 0.005% per 10% change in
line voltage.
Ripple and Noise 0.003% of pulse amplitude.
Nonlinearity ±0.25% of full scale.
Rise Time Exponential waveform, <10 nsec (10 to
90%).
Fall Time Exponential decay with 200- or 400- ì sec
time constant (depending on whether or not the
direct output is terminated).
2.2. CONTROLS
Cal 22-turn potentiometer on front panel, covers
>2:1 amplitude span for normalization of Pulse
Height control to read directly in equivalent energy.
Pulse Height Front panel potentiometer, controls
output pulse height from zero volts to the maximum
determined by the Attenuator switches, the CaI
control setting, and the termination load.
Attenuator Front panel switches, provide step
attenuation over 1000:1 range with 1% resistors (X2,
X5, X10, X10).
Off/On Front panel slide switch, allows internal
relay to be driven from the ac line.
Neg/Pos Front panel slide switch, determines
polarity of the output signal.
2.3. OUTPUTS
Atten Front panel BNC connector provides positive
or negative dc-coupled output with an impedance of
100
Ù .
Direct Front panel BNC connector provides positive
or negative dc-coupled. 0- to 10-V pulse into a high
impedance and 0- to 5-V max pulse into 100
Ù . This
is equivalent to a range of 0- to 220-MeV energy
referred to a silicon detector, when used with
associated charge terminator.
Accessories Included One 100 Ù volt age
terminator and one charge terminator.
2.4. ELECTRICAL AND MECHANICAL
Power Required
+24 V 60 mA; +12 V, 0 mA;
-24 V 60 mA; -12 V, 0 mA.
115 V ac, 8 mA (used only to drive relay).
Weight (Shipping) 4.1 lb (1.86 kg).
Weight (Net) 2.1. lb (0.95 kg).
Dimensions NIM-standard single-width module
(1.25 by 8.714 in.) Per TID-20893 (Rev.).
3. INSTALLATION
3.1. GENERAL
The 480 contains no internal power supply but is
used in c onjunction with an ORTEC 4001/4002
Series Bin and Power Supply, which is intended for
rack mounting. Therefore if vacuum tube equipment
is operated in the same rack with the 480, there
mus t be sufficient cooling air circulating to prevent
any localized heating of the 480 and the associated
Bin and Power Supply. The t emperature of
equipment mounted in racks can easily exceed
120
E
F (50
E
C) unless precautions are taken. The
480 should not be s ubjected to temperatures in
excess of 120
E
F.
3.2. CONNECTION TO POWER