Keysight Technologies 34972A - 34905 A;34906 A

5 Theory of Operation
158 Keysight 34970A/34972A Service Guide
34905A/34906A
Components in this discussion are located on the A1 circuit assembly
(34905-66501 or 34906-66501).
The control circuitry has of two grouping of buffers, relay drivers and relays, one
for each multiplexer bank.