Difference between revisions of "User Manual - NIM Gate and Delay Generator"
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A typical G&D generator similar to the one used for the laboratory exercise is displayed to the right.<br> | A typical G&D generator similar to the one used for the laboratory exercise is displayed to the right.<br> | ||
− | ==== Instructions for use as gating | + | ==== Instructions for use as gating signal<br> ==== |
In order to use the G&D generator as a gate device for linear pulses from a SA, proceed as follows:<br> | In order to use the G&D generator as a gate device for linear pulses from a SA, proceed as follows:<br> | ||
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− | [[Image:Lab4gatedelaysko.PNG|center]]In the above figure, the pink signal is the output pulse from the G&D generator, and the yellow signal is the linear pulse from the Spectroscopy amplifier. If the logical G&D generator pulse is to be used as a gate, the linear pulse from the SA would need to be delayed so the logical pulse can encompass the linear pulse.<br> | + | [[Image:Lab4gatedelaysko.PNG|center]] |
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+ | In the above figure, the pink signal is the final, adjusted output pulse from the G&D generator, and the yellow signal is the linear pulse from the Spectroscopy amplifier. If the logical G&D generator pulse is to be used as a gate, the linear pulse from the SA would need to be delayed so the logical pulse can encompass the linear pulse.<br> | ||
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[[Category:User_manual]] [[Category:Nuclear_Instrument_Modules_(NIM)]] | [[Category:User_manual]] [[Category:Nuclear_Instrument_Modules_(NIM)]] |
Latest revision as of 09:31, 22 November 2010
This manual was written as part of a student lab exercise in the KJM-FYS 5920 course at the University of Oslo in the autumn 2010.
Quick links: KJM-FYS 5920 Lab Exercise 4 | KJM-FYS 5920 Course
Main author (student): Alexander
Co-author (student):
Lab supervisor: Hilde-Therese Nyhus (PhD-student)
Responsible teacher: Prof. Jon Petter Omtvedt
User Manual for NIM Gate and Delay Generator
The Gate and Delay Generator is a device that generates variable logic pulses when incoming pulses triggers it. The output pulses can in turn be used as, for example, a gate for linear pulses from a spectroscopy amplifier (SA) entering an ADC/MCA.
A typical G&D generator similar to the one used for the laboratory exercise is displayed to the right.
Instructions for use as gating signal
In order to use the G&D generator as a gate device for linear pulses from a SA, proceed as follows:
- Connect the output from a single channel analyser to the input on the Gate and Delay (G&D) generator.
- View the output pulses from the spectroscopy amplifier (SA) and the G&D generator on a suitable oscilloscope.
- Using the dial for delay on the G&D generator, adjust the logical output pulse so that the duration is equal to (or just a bit larger than) the positive component of the SA pulse.
- Using the dial (or front-panel screwdriver control) for amplitude on the G&D generator, make the logical pulse larger in amplitude than the SA pulse.
- Connect the output port on the G&D generator to the ADC Gate port on the MCA.
In the above figure, the pink signal is the final, adjusted output pulse from the G&D generator, and the yellow signal is the linear pulse from the Spectroscopy amplifier. If the logical G&D generator pulse is to be used as a gate, the linear pulse from the SA would need to be delayed so the logical pulse can encompass the linear pulse.