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ACOM/IFT CAT 1 > PAAS > Flashcards

PAAS Flashcards

1
Q

What does PAAS stand for?

A

Phased Array Antenna System

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2
Q

What is the function of PAAS?

A

to serve as the primary uplink from the ground station to the aircraft in a receive-only system; provides access to NIPRNET, SIPRNET, & DMS for transfer of e-mail and data files

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3
Q

What does DMS stand for?

A

Defense Messaging System

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4
Q

Where is the Phased Array Antenna (PAA) located?

A

top of aircraft, STA 1100

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5
Q

What are the power requirements for the Phased Array Antenna (PAA)?

A

Passive

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6
Q

What is the function of the Phased Array Antenna (PAA)?

A

to receive circular and linear polarized signals; to monitor internal overtemperature conditions and signal the PAA Power Supply to remove power when such a condition exists

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7
Q

Where is the Linear Polarization Converter (LPC) located?

A

overhead rack, STA 1075

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8
Q

What are the power requirements for the Linear Polarization Converter (LPC)?

A

> > > «<

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9
Q

What is the function of the Linear Polarization Converter (LPC)?

A

to convert linear polarization input signals to vertical or horizontal polarization signals

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10
Q

If the LPC receives a circular polarized signal from the PAA, it _____.

A

passes this signal through to the Low Noise Block (LNB)

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11
Q

If the LPC receives a linear polarized signal from the PAA, it _____.

A

performs addition or subtraction to the signal before sending it to the Low Noise Block (LNB)

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12
Q

Where is the Low Noise Block (LNB) located?

A

overhead rack, STA 1075

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13
Q

What are the power requirements for the Low Noise Block (LNB)?

A

> > > «<

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14
Q

What is the function of the Low Noise Block (LNB)?

A

to receive RF input from the LPC and convert Ku-band satellite frequencies, both lower and upper, to L-band frequencies, which are suitable for the Data Receiver

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15
Q

Over what frequency range does the lower Ku-band operate?

A

11.7 - 12.3 GHz

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16
Q

Over what frequency range does the upper Ku-band operate?

A

12.2 - 12.7 GHz

17
Q

Over what frequency range does the L-band operate?

A

950 - 1,500 MHz

18
Q

Where is the PAA Power Supply located?

A

overhead rack, STA 1075

19
Q

What are the power requirements of the PAA Power Supply?

A

> > > «<

20
Q

What is the function of the PAA Power Supply?

A

to convert 115 VAC 400 Hz power to DC power for the antenna, LPC, SPAC, & LNB; to monitor output power and indicate any fault status to the SPAC

21
Q

What power does the PAA Power Supply output to each component?

A

6 VDC +/- 5 VDC to the antenna;

19.5 VDC to the LPC, SPAC, & LNB

22
Q

Where is the System Phased Array Controller (SPAC) located?

A

overhead rack, STA 1075

23
Q

What are the power requirements for the System Phased Array Controller (SPAC)?

A

19.5 VDC from the PAA Power Supply

24
Q

What is the function of the System Phased Array Controller (SPAC)?

A

provide phasing and steering controls to PAA and control signals to PAA components; interface with Data Receiver and IRUs; control antenna element pointing; control LPC selection of circular vs linear polarization combining

25
Q

Where is the RF Switch located?

A

overhead rack, STA 1075

26
Q

What are the power requirements for the RF Switch?

A

> > > «<

27
Q

What is the function of the RF Switch?

A

receive 2 input signals from SPAC; output 1 RF to Data Receiver

28
Q

Where is the PAA/LAN Power Control Panel located?

A

P20 Bay 2

29
Q

What are the power requirements for the PAA/LAN Power Control Panel?

A

28 VDC from PAA/LAN PWR c/b on P20 28 VDC DISTR 1B

30
Q

What is the function of the PAA/LAN Power Control Panel?

A

to control power to the PAAS, CML, & 60 Hz Converter

31
Q

Where is the Data Receiver located?

A

PAA overhead rack, STA 1075

32
Q

What are the power requirements for the Data Receiver?

A

> > > «<

33
Q

What is the function of the Data Receiver?

A

receive an L-band RF signal, decode it, & send it to CML control router

34
Q

The Data Receiver can handle signals up to _____.

A

38.4 Kbps of data, video, or audio

35
Q

Data Receiver signals both audio and video use _____.

A

MPEG-2 compression

ACOM/IFT CAT 1 (27 decks)

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