ANSWERS TO QUESTIONS Q1. THROUGH Q12.

A1. An impedance-matched device capable of absorbing all of a transmitters power.
A2. It demodulates ssb, cw, and fsk signals.
A3. 300 kilohertz to 3 megahertz.
A4. Troposphere.
A5. Up to 600 4-kilohertz channels.
A6. Up to 800 kilometers (500 statute miles).
A7. Speed.
A8. Links 4A, 11, and 14.
A9. They must be lightweight, compact, and self-contained.
A10. At or near visible light.
A11. Cw or pulsed.
A12. It absorbs it.