40-Channel Single-Ended Multiplexer Module for 34970A/34972A The Agilent (now Keysight) 34908A 40-Channel Single-Ended Multiplexer Module can be used for 34970A/34972A data acquisition/switch units and the greatest density in common-low applications, such as battery test, component characterization, and benchtop testing. Each module switches 40 one-wire inputs. All two-wire internal measurements except current are supported. The module low connection is isolated from earth and can float up to 300 V. Single-ended module Number of channels: 40 Scanning: 60 channels/s Built-in thermocouple reference junction Single-wire switching for common-low applications