Model DB-2 | NIM Random Pulse Generator
The Model DB-2 is a pulse generator which accurately simulates the random and pile-up characteristics of pulses from a radiation detector. It provides pulses which are mono-energetic over a broad range of average count rates. Under high count rate conditions, the pulses will pile up as shown in the diagram below. This characteristics is useful in determining pile-up or count-rate effects and in measuring the resolution of high count rate spectroscopy systems. Besides random pulse, the Model DB-2 also provides mono energetic repetitive pulses. In this mode, the DB-2 is an excellent general purpose pulser. When the EXT REF input is used with an external ramp, the DB-2 provides sliding pulses to quickly check system or component linearity.
Overview
Features
- Random Tail pulses for MCA, PHA Pile-up and Dead-time Testing
- Continuously Adjustable Rates from 10 Hz to 1 MHz
Specifications
Rep Rate (Count Rate)
10 Hz to 1 MHz [ Continuously Adjustable]
Mode
Random or Repetitive
Random Distribution
Poisson for intervals greater than 1.4 µs
Pulse Shape
Tail Pulse
Rise Time of Outputs (10-90%)
0.1-20 µs ( 8 steps )
Decay Time Constant (100-37%)
5-1000 µs ( 8 steps )
Rise and Decay time independent of each other for Decay Time/ Rise Time > 10.
Pulse Amplitude (STEP) Characterization
Amplitude Shift with Count Rate: < 0.05% from 10 Hz to 100 kHz
Jitter (resolution): 0.01% RMS
Temperature Coefficient: 0.02%/˚C
Frequency Jitter (Repetitive Mode)
< 0.1%
External Trigger Input
Requires 1 V Positive Pulse
1 kΩ input impedance
Trigger Output
3 V 100 ns Pulse Width
20 ns rise time
50 Ω Output impedance
Output Amplitude Ranges
Repetitive: 0 to 10 V
Random: 0 to 1 V
Adjustable by 10-turn Potentiometer from zero to maximum.
Normalize
40% to 100% of Amplitude via 10-Turn Potentiometer
Pulse Output Polarity
Positive or Negative
Attenuation
4 Step Attenuators [x2, x5, x10, and x10] combination to make maximum of x1000
External Reference Input
0 to 10 VDC; 10kΩ Input impedance
Power Requirements
Dimension
Double-width NIM module; 2.70″ wide by 8.70″ high in accordance with TID-20893 (Rev. 3)
Weight
3.5 lbs. net; 7 lbs. shipping
Shipping Dimensions
18x12x9″
Shipping Weight
10 lbs
Technical Resources
Downloadable Resources
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