The model 4161A is a dual channel, analog to digital converter ADC) module which will measure one to two analog voltages, display the result on a digital panel meter, and allow it to be read by an external computer connected to the module's RS232 or GPIB interface.
The module has two signal input channels, A and B, each with a full-scale sensitivity of ±10 V DC. On receipt of a trigger command at the appropriate channel the input voltage is digitized to a 5 mV resolution. A computer coupled to the module can determine the value of the input voltage by sending a simple ASCII command. The 3% digit panel meter on the 4161 A can be switched to monitor either of the signal channels.