A Four Channel 250 MHz Visual Counter

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Description

A visual counter rated at 250 mhz. with a pulse-pair resolution of 2.6 nanoseconds for nuclear instrument module (NIM) signals has been designed. Pulse widths for NIM signals must be equal to or greater than 2 ns. The counter has a separate input for transistor-transistor logic (TTL) signals and for this logic level it operates at rates equal to or less than 190 mhz. TTL pulses must be greater than 4 ns. The design was implemented on a printed circuit card. Four of these cards were packaged into a single unit resulting in a four channel device that can be ... continued below

Physical Description

8 p.

Creation Information

Flores, I.; Blando, P.; Crawford, H.; Engelage, J.; Greiner, L.; Ko, S. et al. April 1, 1992.

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Description

A visual counter rated at 250 mhz. with a pulse-pair resolution of 2.6 nanoseconds for nuclear instrument module (NIM) signals has been designed. Pulse widths for NIM signals must be equal to or greater than 2 ns. The counter has a separate input for transistor-transistor logic (TTL) signals and for this logic level it operates at rates equal to or less than 190 mhz. TTL pulses must be greater than 4 ns. The design was implemented on a printed circuit card. Four of these cards were packaged into a single unit resulting in a four channel device that can be mounted into a 19 inch rack. Seven units were built; they are presently used in the experimental area and in the Main Control Room of the Bevalac. The counter accepts well defined NIM or TTL signals internally terminated with 50 ohms. All the controls and the signal input connectors are located on the front panel. An Overflow output, Gate, and Reset inputs are located on the back panel. The counters have 8 Light Emitting Diode digit displays which are 20.3 mm high with a viewing distance rating of 10 meters. Light filters are used for the LED displays greatly enhancing their visibility.

Physical Description

8 p.

Notes

OSTI; NTIS; GPO Dep.

Source

  • Other Information: PBD: Apr 1992

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  • Other: DE92016920
  • Report No.: LBL-PUB--3097
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/10159460 | External Link
  • Office of Scientific & Technical Information Report Number: 10159460
  • Archival Resource Key: ark:/67531/metadc1390193

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • April 1, 1992

Added to The UNT Digital Library

  • Nov. 28, 2018, 2:33 p.m.

Description Last Updated

  • Dec. 5, 2018, 5:01 p.m.

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Flores, I.; Blando, P.; Crawford, H.; Engelage, J.; Greiner, L.; Ko, S. et al. A Four Channel 250 MHz Visual Counter, report, April 1, 1992; California. (https://digital.library.unt.edu/ark:/67531/metadc1390193/: accessed April 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.