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11A32: Difference between revisions
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==Internals== | ==Internals== | ||
===Analog=== | ===Analog=== | ||
Each input channel has a separate attenuator module containing passive 1 megohm attenuators, an AC coupling capacitor, a switch selecting the calibrator or signal input, and an [[M474]] buffer amplifier. The calibrator signal turned off inside the plugin when not in use. | Each input channel has a separate attenuator module containing passive 1 megohm attenuators, an AC coupling capacitor, a switch selecting the calibrator or signal input, and an [[M474]] buffer amplifier. The calibrator signal is turned off inside the plugin when not in use. | ||
The attenuator module output feeds the + input of the [[M377]] amplifier IC through a (blue) 50 ohm transmission line, one per input channel. The cable lengths set a standard delay per plugin. | The attenuator module output feeds the + input of the [[M377]] amplifier IC through a (blue) 50 ohm transmission line, one per input channel. The cable lengths set a standard delay per plugin. | ||
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Each of the two channels has its own AUX output on dedicated pins of the plug-in interface connector: | Each of the two channels has its own AUX output on dedicated pins of the plug-in interface connector: | ||
{| class="wikitable" style="margin:auto" | |||
|- | |||
! signal name !! positive pin number !! negative pin number | |||
|- | |||
| AUX 1 || B38 || B37 | |||
|- | |||
| AUX 2 || A36 || A35 | |||
|- | |||
|} | |||
See also the block diagram below. | See also the block diagram below. | ||