Ship Radar Endorsement: Element 8

1. A With A and B high, Q1 is saturated and Q2 is off.
2. B With either A or B low, Q1 is saturated and Q2 is off.
3. C With A and B low, Q2 is on and Q4 is off.
4. D With either A or B low, Q1 is off and Q2 is on.

Tip: press A-D to answer