9-18B2 A
 Which of the following conditions indicate the proper operation of a 250 Watt MF/HF transmitter in the F1B FEC mode?
A. The RF power meter indicates constant output at a level between 225 watts and 250 watts during transmission.
B. The RF power meter indicates power output only when characters are typed on the NBDP keyboard.
C. The RF "S" meter indicates a signal level between 225 watts and 250 watts during NBDP reception.  
D. The RF power meter indicates an output that fluctuates between 0 and 250 watts during transmission.
