Logic In LEDs

Provides information about the DR4 Logic Inputs. The numbers at the top of the front panel correspond to the DR4 Logic In ports on the back of the DR4. For example, the LED for number 1 provides information about the Logic In port 1.

Under each Logic In port number is an LED for the state of the Logic In. When the Logic In signal is at logic high (> +2 Volts) the LED is off and when the signal is at logic low (< 0.9 Volts), the LED is on.