5 Theory of Operation
160 Keysight 34970A/34972A Service Guide
34908A
Components in this discussion are located on the A1 circuit assembly
(34908-66501).
The control circuitry has three grouping of latches, relay drivers and relays. The 40
voltage and resistance measurement channels are, for control purposes, arranged
into 8 rows by 10 columns. Tree switching controls bank selection and
connections to the analog bus.
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