9302

ORTEC
®
9302
Amplifier Discriminator
• Fast amplifier and discriminator
for photon, electron, or ion
counting applications
• 100-MHz counting rate capability
• Includes rate monitor facility
The ORTEC Model 9302 is a fast
Amplifier and Discriminator in a singlewide NIM-standard module designed for
use with photomultiplier or electron
multiplier tubes in photon, ion, or electron
counting applications. Features of the
Model 9302 include a wideband, highgain amplifier and an integral
discriminator capable of counting rates
up to 100 MHz.
Specifications
Incorporated into the module is a rate
monitor system. This facility can be used
to perform external switching when the
pulse counting rate is modulated. At
counting rates equal to or above those
selected by the monitor rate
discriminator, a voltage of >+2 will be
present at the signal monitor connector.
At counting rates below the rate selected,
0 V will be present at the connector. The
threshold value is selected by the frontpanel switch.
NONLINEARITY ≤±1%.
The amplifier section of the Model 9302
is ac-coupled with input and output
impedances of 50 Ω. The amplifier has a
rise time of typically 3 ns at a gain setting
of 200 and <2 ns when the gain is set at
20.
The discriminator section of the Model
9302 is a leading-edge discriminator
whose level can be adjusted through a
range from 50 mV to 1 V.
PERFORMANCE
Amplifier
RISE TIME Typically 3.0 ns.
NOISE ≤10 µV for maximum gain setting.
OUTPUT VOLTAGE RANGE 0 to –500 mV, on
a 50-Ω load.
GAIN X20 or X200, noninverting.
TEMPERATURE INSTABILITY
Gain <±0.1%/°C.
DC Level <±50 µV/°C, referred to input.
Discriminator
THRESHOLD RANGE 50 mV to 1 V.
PULSE PAIR RESOLUTION <10 ns; typically
9 ns.
WALK ≤2.0 ns from X2 to X20 threshold.
CONTROLS
GAIN 2-position slide switch on front panel for
selecting amplifier gain of 20 or 200.
DISC LEVEL Front-panel potentiometer for
selecting discriminator level, ranging from
50 mV to 1 V.
MONITOR RATE DISC Front-panel rotary
switch for selecting pulse-rate discriminator
threshold with settings of 1 kHz, 10 kHz,
100 kHz, and 1 MHz.
INPUT
AMPLIFIER IN Rear-panel BNC connector
accepts negative input signals; protected to
±100 V at 10% duty factor; Zin = 50 Ω.
OUTPUTS
AMP OUT Rear-panel BNC connector
provides linear analog output; Zo = 50 Ω.
DISC OUT Two independent rear-panel BNC
connectors provide negative current pulse of
16 mA into 50 Ω; width ≤5 ns; rise time 1.5 ns.
Typical 100-MHz Counting System.
9302
Amplifier Discriminator
SIGNAL MONITOR Rear-panel BNC
connector provides 0 ±0.2 V when
discriminator count rate is below threshold and
≥+2 V when it is above threshold.
PREAMP POWER Amphenol 17-10090 rearpanel connector provides necessary power for
9301 Fast Preamplifier.
ELECTRICAL AND MECHANICAL
POWER REQUIRED +12 V, 140 mA; –12 V,
205 mA; +24 V, 85 mA; –24 V, 90 mA.
WEIGHT
Net 0.9 kg (2.0 lb).
Shipping 2.25 kg (5.0 lb).
DIMENSIONS NIM-standard single-width
module 3.43 X 22.13 cm (1.35 X 8.714 in.) per
DOE/ER-0457T.
Ordering Information
To order, specify:
Model
Description
9302
Amplifier Discriminator
Specifications subject to change
092407
ORTEC
®
www.ortec-online.com
Tel. (865) 482-4411 • Fax (865) 483-0396 • [email protected]
801 South Illinois Ave., Oak Ridge, TN 37831-0895 U.S.A.
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