What are the voltage requirements of the single-ended channels in the EDR4?
The EDR4 does not have a fixed gain such as the EDR3. The EDR3 is limited to 500 millivolts as the full-scale range of an external transducer. The EDR4, however, can measure up to 1500 mv from the external transducer. With adjustable gain, your full-scale range is adjustable from approximately 50 millivolts to 1500 millivolts. The practical bottom-end (full-scale ranges less than 100 millivolts) is very dependent on the transducer characteristics and the electronics of your particular recorder.
