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11401: Difference between revisions
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The 11401 uses the [[156-2622-00]] [[SDI]] controller IC (U330). | The 11401 uses the [[156-2622-00]] [[SDI]] controller IC (U330). | ||
== Vertical Signal Path == | |||
Each of the three plug-in bays in the 11401 has a dedicated sampler. | |||
The sampling clock is common to the three samplers. | |||
The sampling pulse is generated by an ECL 2-input OR gate being fed SAMPLE_CLOCK and delay_5ns(invert(SAMPLE_CLOCK)). | |||
This produces 5ns pulses with rise time around 1 ns. | |||
The 5ns pulses are fed to a discrete NPN differential pair operating in a clipping current-switch mode, | |||
resulting in faster edges. | |||
The output of the differential pair drive a strobe generator IC, U1040, which is an M453 die, | |||
packaged as part number [[155-0320-00]] or 155-0320-01, depending on the mainframe's serial number. | |||
U1040 has three sampling strobe outputs, which are fed to the sampling gates. | |||
==Specifications== | ==Specifications== | ||