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==Internals== | ==Internals== | ||
The S-4 sampling gate is based upon a traveling wave trapped-charge transmission line in which the sampling window is set by the propagation time of a pulse edge through a thick-film transmission line. This technique requires only a sharp pulse edge rather than a precise pulse width, which is harder to generate. | The S-4 sampling gate is based upon a traveling wave trapped-charge transmission line | ||
in which the sampling window is set by the propagation time of a pulse edge through a thick-film transmission line. | |||
This technique requires only a sharp pulse edge rather than a precise pulse width, which is harder to generate. | |||
The sampling diodes are housed in a special coaxial connector that provides a high bandwidth signal path. | The sampling diodes are housed in a special coaxial connector that provides a high bandwidth signal path. | ||
To disassemble the sampler hybrid, first remove it from the sampler board as per the manual. | To disassemble the sampler hybrid, first remove it from the sampler board as per the manual. | ||
connector using a 7/32" wrench and remove the 20 dB attenuator with small | Remove the input connector using a 7/32" wrench and remove the 20 dB attenuator with small pliers. | ||
to the housing using roll pins that can be pressed out with a 0.030" pin punch. | The ceramic board is held to the housing using roll pins that can be pressed out with a 0.030" pin punch. | ||
each about 0.75mm square. | The hybrid has six diodes, each about 0.75mm square. | ||
are wire-bonded (twice) over a gap to the next step in the strobe line. | The cathodes are glued to the gold substrate with conductive epoxy and the anodes | ||
diode may fit across the gap but cleanly removing a failed diode without damaging the substrate would be | are wire-bonded (twice) over a gap to the next step in the strobe line. | ||
quite difficult. | It appears that a standard beam-lead diode may fit across the gap | ||
but cleanly removing a failed diode without damaging the substrate would be quite difficult. | |||
==Links== | ==Links== |