PAAS Flashcards
(35 cards)
What does PAAS stand for?
Phased Array Antenna System
What is the function of PAAS?
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
What does DMS stand for?
Defense Messaging System
Where is the Phased Array Antenna (PAA) located?
top of aircraft, STA 1100
What are the power requirements for the Phased Array Antenna (PAA)?
Passive
What is the function of the Phased Array Antenna (PAA)?
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
Where is the Linear Polarization Converter (LPC) located?
overhead rack, STA 1075
What are the power requirements for the Linear Polarization Converter (LPC)?
> > > «<
What is the function of the Linear Polarization Converter (LPC)?
to convert linear polarization input signals to vertical or horizontal polarization signals
If the LPC receives a circular polarized signal from the PAA, it _____.
passes this signal through to the Low Noise Block (LNB)
If the LPC receives a linear polarized signal from the PAA, it _____.
performs addition or subtraction to the signal before sending it to the Low Noise Block (LNB)
Where is the Low Noise Block (LNB) located?
overhead rack, STA 1075
What are the power requirements for the Low Noise Block (LNB)?
> > > «<
What is the function of the Low Noise Block (LNB)?
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
Over what frequency range does the lower Ku-band operate?
11.7 - 12.3 GHz
Over what frequency range does the upper Ku-band operate?
12.2 - 12.7 GHz
Over what frequency range does the L-band operate?
950 - 1,500 MHz
Where is the PAA Power Supply located?
overhead rack, STA 1075
What are the power requirements of the PAA Power Supply?
> > > «<
What is the function of the PAA Power Supply?
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
What power does the PAA Power Supply output to each component?
6 VDC +/- 5 VDC to the antenna;
19.5 VDC to the LPC, SPAC, & LNB
Where is the System Phased Array Controller (SPAC) located?
overhead rack, STA 1075
What are the power requirements for the System Phased Array Controller (SPAC)?
19.5 VDC from the PAA Power Supply
What is the function of the System Phased Array Controller (SPAC)?
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
