Communications ch.5 pending

Question 1

how do you place a priority call to a selected cabin station?

Answer 1

pushing the CAB transmitter select switch twice within one second
places a priority call to a selected cabin station.

Question 2

Is it possible for one clearance to contain both a radio frequency and a transponder code?

Answer 2

Yes:
VHF frequencies appear when VHF
page 1 is displayed,
HF frequencies appear when the HF page 1 is displayed and
transponder codes appear when the transponder page is displayed on the TCP.

Question 3

what indicates a failure of the HF system to tune?

Answer 3

A tone lasting longer than 7 seconds.

Question 4

While tuning an HF frequency a “tuning” tone will always be heard?

Answer 4

Not always.
Stored frequencies (in memory for the last 100 tuned frequencies) may tune quickly and a tone may not be noticeable.

Question 5

can both HF radios transmit simultaneously?

Answer 5

No.
When either HF radio is transmitting, the antenna is disconnected from the other HF radio, and it cannot be used to transmit or receive.

However, both HF radios can receive simultaneously if neither is being used for transmitting.