Communications Flashcards
Communications Which VHF(s) can be used for both voice and data ?
VHF Center VHF Right (But only one can operate in the data mode at a time)
Communications Can both HF radios transmit simultaneously ?
NO, only one at a time. (but they can receive simultaneously)
Communications Can both HF radios receive simultaneously ?
YES. (But they can’t transmit simultaneously)
Communications Can the HF radios be used in case of smoke detection in the aft cargo compartment ?
NO, if smoke is detected in the aft cargo compartment, power is removed from HF radios.
Communications HF tuning : what indicates a failure to tune the antenna ?
A tone lasting longer than 7 seconds.
Communications Can HF datalink transmissions be used on the ground ?
NO, they are inhibited.
Communications Which panel is primarily used to control the VHF, HF and SATCOM systems ?
The TCP (Tuning and Control panel)
Communications What do dashes indicate on a VHS line on the TCP ?
The VHF is inoperative.
Communications Can a CVR test fail if the crew is speaking during the test ?
YES
Communications Which radios does SELCAL monitor ?
All 3 VHFs and the 2 HFs
Communications What does the color cyan (blue) indicate on the communications menu on the MFD ?
The menu item is inhibited.
Communications How can a text entry field be reset to its default value ?
By transferring a blank scratchpad to the entry field.
Communications Which ACP(s) can be used for a SATCOM/Cabin Conf call ?
Only the Center one. (Limitations)
Communications Is there a Stuck Mic protection in flight ?
YES If a VHF or HF radio transmits for more than 30 seconds, the EICAS advisory message RADIO TRANSMIT CAPT, F/O, or OBS is displayed. The message is removed when the transmission stops.
Communications Is there a Stuck Mic protection on the ground ?
YES Any VHF radio transmission longer than approximately 35 seconds is automatically disabled. Several seconds before disablement, an intermittent tone can be heard through the audio system for that radio. That radio is re-enabled when its microphone switch is released.
Communications What happens when a VHF radio is tuned to 121,5 ?
All flight crew automatically monitor that radio.
How many Transmitter selector switches on the Audio Control Panel (ACP) can be selected at any one time?
Normally one, but CAB and SAT may be selected at the same time for cabin to SATCOM conferencing
If a transmitter button is selected, is it necessary to select the associated receiver button/volume control in order to hear the audio?
No, it’s automatic, even though the light is out! (Volume must be turned up).
How are the flight crew alerted to an incoming VHF/HF SELCAL on the ACP?
The appropriate CALL light will illuminate.
On which systems does the V.B.R switch have any effect?
VOR, ADF, ILS or DME (audio filter).
What action can be taken if either the Captain or the F/O’s ACP fails?
Select the observer’s Audio selector to CAPT or F/O as appropriate.
What methods are available to key a selected transmitter?
Pushing the desired ACP transmitter select switch and using MIC position of •control wheel • audio control panel microphone/interphone switch • glareshield MIC switch • hand microphone push-to-talk switch.
If a TCP ‘OFF’ light is illuminated, can that unit tune any of the radios?
No. (The OFF button must be selected ON first).
State the required steps to transmit/receive on VHF R from a TCP and ACP, and at the same time monitor audio signals from VHF C.
TCP • Ensure the TCP OFF light is out. • Press the VHF mode select key. • Line select VHF R to make it the active radio. • Type the desired frequency into the scratchpad. Then either: - • Select the frequency into the standby line, then press XFR to make it active, or, • Select the frequency straight into the active line. ACP • Push the VHF R transmitter select switch, and adjust the volume. • Push the VHF C receiver volume control, and adjust the volume.
How many VHF frequencies can be stored by the TCP?
A total of 24 frequencies may be stored on 3 STORED VHF pages.
a. If 121.5 MHz is tuned on VHF L from the Capt’s TCP, what happens at the FO’s and observer’s ACP? b. What happens if 121.5 MHz is tuned from the FO’s TCP on VHF R?
a. The receiver lights on both ACPs illuminate and they would be able to monitor that radio. b. The same. When a VHF radio is tuned to frequency 121.5, all flight crew automatically monitor the radio; the receiver lights on all audio control panels illuminate.
a. Which of the VHF radios can be configured for DATA or VOICE communications? b. How many VHF radios can be used in DATA mode at any time?
a. VHF C or VHF R can be figured for data or voice. b. Only one VHF radio can operate in the data mode at a time.
How many HF frequencies can be stored by the TCP?
Managing HF frequencies on the TCP is identical to VHF mode operation. Up to three pages of stored HF frequencies (24 total) can be stored in the TCP.
In the event that any mic-PTT switch is keyed for more than 30 seconds, what EICAS advisory message is displayed?
EICAS alert RADIO TRANSMIT CAPT, F/O or OBS is displayed; message removed when transmission stops.
What does the TCP SATCOM control page allow crews to do?
• To initiate, answer and terminate calls • Monitor call status • Access lower- level pages.
a. How are the flight crew alerted to an incoming SATCOM call? b. How are calls terminated from the flight deck?
a. SELCAL chime and illumination of a CALL light on the ACP. b. Selecting END CALL on the TCP control page.
