Unit 3. Air Traffic Control Systems

Question 1

412. Basic components

1. Identify the two major assemblies of the ETVS.

Answer 1

(1) Communications console.

(2) Central equipment.

Question 2

2. Where is the maintenance position located?

Answer 2

At the central equipment racks.

Question 3

3. How do the capabilities of the maintenance position differ from the operator positions?

Answer 3

There is no difference in capabilities.

Question 4

413. Key system features

1. What ETVS component is the primary operator-control mechanism?

Answer 4

The TED.

Question 5

2. How is position-to-frequency programming accomplished?

Answer 5

Via the SCT.

Question 6

3. What ETVS component displays system faults?

Answer 6

The SCT.

Question 7

4. What type of link does the radio subsystem use to pass card status and switchover control between redundant radio processor cards?

Answer 7

RS–232 link.

Question 8

5. List the components that make up the telephone subsystem in the ETVS.

Answer 8

(1) Telephone card cages.
(2) Interface cards.
(3) Ring generator.
(4) Phone conferencer pairs.
(5) TMU/CMU.

Question 9

414. Block diagram theory of operation

1. What is the purpose of the central equipment processor cards?

Answer 9

To provide central equipment interface for radio, operator, and telephone voice.

Question 10

2. What is the purpose of the DA and IA controls?

Answer 10

To establish telephone communications.

Question 11

3. How does an operator initiate communications for a radio channel?

Answer 11

Via a key-press on the TED.

Question 12

4. In what form does microphone audio travel to the central equipment rack during transmit?

Answer 12

In digital form.

Question 13

5. State the function of the CCS.

Answer 13

To designate operator position functions and system configuration.

Question 14

415. Fundamentals

1. How is DRU record and playback controlled?

Answer 14

With the computer workstation.

Question 15

2. State the purpose of the NiceLog Software Suite.

Answer 15

To manipulate various features within the DVRS.

Question 16

3. In the event of a power failure, how long will the UPS power the DVRS?

Answer 16

Five minutes.

Question 17

416. Capabilities/limitations and theory of operation

1. What is the recording capacity of each DAT in the DVRS?

Answer 17

500 channel hours.

Question 18

2. What is used to provide accurate time stamp of recordings?

Answer 18

A GPS receiver.

Question 19

3. Which CCA in the DRU digitizes the audio?

Answer 19

The ADIF.

Question 20

4. When is information on the hard disk deleted?

Answer 20

When the software determines that particular audio is the oldest audio on the hard disk and the hard disk is full.