COMM/NAV

Question 1

Is the Intercommunication Set (ICS) digital or analog? What does it provide?

Answer 1

The Intercommunication Set (ICS) is a digitally operated set that provides interphone, voice, and data communications.

Question 2

Which communication antenna is combined with the transponder?

Answer 2

RT COM3

Question 3

What is the purpose of the COM 3 Antenna Logic Unit?

Answer 3

Antenna Logic UnitThe antenna logic unit (Figure 2, Sheet 9, Detail R) receives tuning data from the R/T and translates the data to the appropriate drive signals to tune the antenna via parallel lines at the output connector. The unit receives electrical power of 28 vdc from the NO. 2 DC PRI BUS.

Question 4

List the troubleshooting procedures for the avionics relay panel?

Answer 4

WP2025 Table 1

Question 5

On the ICS box, what does the ICU status light indicate?

Answer 5

Link between ICS panel and ICU is broken

Question 6

The AN/ARC-231 radio set is capable of operating from what MHz band?

Answer 6

30 megahertz (MHz) to 512MHz

Question 7

What are the six basic operating modes of the AN-ARC 231(v)for communications?

Answer 7

· LOS

· Maritime

· HQ

· SINCGARS

· SATCOM

· DAMA

Question 8

What are the characteristics of the ARC 231(v) keep alive battery (KAB)?

Answer 8

Provides voltage to the R/T during prolonged periods of power outage to retain data stored in the R/T volatile memory. In addition, the KAB is charged from the aircraft 28 VDC bus through an internal battery charger circuit. A fully charged KAB will enable cryptographic data storage for up to seven days.

Question 9

The No. 1 VHF/FM Radio Set (No. 1 VHF/FM Radio Set) provides what?

Answer 9

Two-way FM voice and data communications on any one of 2,320 channels in the frequency range of 30.00 to 87.975 MHz in units of 25 kilohertz (kHz).

Question 10

Under what conditions is the use of The emergency control panel (ECP) necessary ?

Answer 10

During emergency conditions when the regular FMS controls and displays may be unavailable or unreliable.

Question 11

Where is the local access panel located and what does it provide?

Answer 11

It is located on the lower center console left side, and provides for inputting data into the avionics sets from a fill device via the LOAD RCPT fill port connector.

Question 12

Where is the avionics relay panel located and what does it contain?

Answer 12

It is located on the underside of the nose compartment shelf, contains relays and diodes that provide signal routing and isolation for various avionics sets.

Question 13

What components interface with the Avionics Relay Panel?

Answer 13

· Electronic Standby Instrument Set (ESIS)

· RADALT Set

· Stormscope Set

· Air Data Computer (ADC) Set

· FMS

· F/MDS

· Ethernet Switching Hubs

· IDM

· Data Transfer Set

· Digital Automatic Flight Control Units

· No. 1 VHF/FM Radio Set and No. 2 VHF/FM Radio Set

· UHF/AM Radio Set and VHF/AM Radio Set

· HF Radio Set

· ICS

· Transponder Set

· AVCS.

Question 14

Are there any specific functional checks associated with the Avionics Relay Panel?

Answer 14

No

Question 15

What is the function of the RADALT ?

Answer 15

The RADALT provides instantaneous indication of actual terrain clearance height. It measures and displays altitude above ground level to the pilot and copilot.

Question 16

What components interface with the RADALT set?

Answer 16

· Mission System Control Panel

· Copilot Auxiliary Circuit Breaker Panel

· Avionics Relay Panel

Question 17

What BIT checks are associated with the Radar Altimeter?

Answer 17

None

Question 18

What provides the primary interface between the ICS control panels and the FMS?

Answer 18

ICU

Question 19

The ________ receives marker beacon signals and provides visual and aural information to the pilots.

Answer 19

AN/ARN-147(V)

Question 20

What AN/ARN-149 ADF mode provides only audio output?

Answer 20

Antenna (ANT) Mode