Theory of Operation 5
Keysight 34970A/34972A Service Guide 157
The row latch, U102, and column latch U103, control the relays. The row drivers
are divided into four groups of set and reset drivers. Each group of row drivers
controls eight relays. The column drivers operate as a pair. There are eight column
drivers each controlling four relays. The relays are arranged in 4 rows by 8
columns.
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