Theory of Operation 5
Keysight 34970A/34972A Service Guide 159
Bank1 latch, U102, and Bank2 latch, U103, control the relays. The bank drivers are
divided into six groups of set and reset drivers. Each set and reset driver controls
one relay. The column drivers operate as a pair. There are six column drivers each
controlling a relay. The relays are arranged into two independent banks:
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