• Model BH-1

The Model BH-1 is a tail pulse generator which simulates the broad range of pulses encountered in the nuclear field. Typical applications of the Model BH-1 include: determining the proper timing of linear gates and coincidence units , linearity measurements of amplifiers, threshold setting of discriminators and single channel analyzers, and measuring resolution flow noise amplifiers.



  • Repetition rate 10 Hz - 1 MHz
  • Delay adjustable from -50 ns to 10 ms
  • Rise time 20 ns - 50 µs
  • Fall time 50 ns - 1000 /°s
  • Integral linearity of amplitude ±0.1%
  • Output amplitude: to 9.99 volts from 50 ohms
  • Amplitude jitter: less than 0.002% rms



Frequency 10 Hz to 1 MHz, continuously adjustable.
External Trigger Requires 1 volt, positive pulse.
Single Cycle One pulse occurs each time the push button is pressed.
Single/Double Pulse This toggle provides for a pulse pair whose separation is varied by the delay controls.

Minimum separation is 50 ns.

Rise Time of Output (10-90%) 20 ns to 50 us (in 11 steps), exponential shape and independent of decay time.
Decay Time Constant of Output(100-37%) 50 ns to 1000 us (in 11 steps), exponential shape and independent of risetime for decay/rise time >10.
Trigger Out Positive 3 volt pulse, 10 ns rise time, 0.2 us witdh, 50 ohms output impedance.
Delay -50 ns advance to 10 ms delay (between Trigger Out and leading edge of output pulse).
Output Amplitude Zero to 9.99 volts maximum. Adjustable by ten-turn potentiometer.
Attenuator X10 and X100 providing up to 1000: 1.
Integral Linearity of Output ±0.1%.
Duty Factor Effect Amplitude shift less than 0.1% below 30% duty factor. Duty factor in percent for tail pulses is defined as: (8 decay time constants/pulse spacing) X100.
Output Polarity Positive or negative.
Output Impedance 50 ohms.
External Reference Input ±15 volts max.
Jitter of Frequency and Delay Less than 0.1%.
Temperature Coefficient of Output Less than 0.03%/°C.
Amplitude Jitter (Resolution) Less than 0.01% peak, 0.002% rms of pulse amplitude.
Power Required +24 V at 50 mA, -24 V at 50 mA, +12 V at 175 mA, -12 V at 80 mA.
Mechanical Dimensions Double-witdh AEC module, 2.70 inches wide by 8.70 inches high. Conformsto AEC Report TID-20893 (Rev. 2).
Weight 3.5 lbs. net, shipping 7 Ibs.


PDF icon bh-1_datasheet.pdf3.09 MB
Product support: 

Download and access all GUIs, Firmware, Drivers and other supporting material.

Price information

Price lists are available to our registered users. To view pricing for this and other products, please log in or create a free account.