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NATOPS > C3I (UHF3) > Flashcards

C3I (UHF3) Flashcards

0
Q

ODS port 5

A

Sends Matt and mini dama tuning commands to the antenna combiner

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1
Q

ODS port 1

A
  • Interfaces with DCMS and CARP
  • Allows online control if the mini dama
  • routes status reports between ODS, MATT, and antenna combiner
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2
Q

ODS PORT 9

A

Used for MATT download and TDIMF format MATT TRACKS.

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3
Q

Function of the SATCOM preamp/diplexers

A

XMIT: receives MINI DAMA signal from RF antenna switch and sends it to antenna.

RCV: receives incoming signal from antenna, amplifies it and send is to the antenna combiner.

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4
Q

Is the RF antenna switch used for SATCOM transmission or reception?

A

Transmission

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5
Q

The antenna combiner contains how many channels?

A

4 channels

A, B, C, D

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6
Q

Which antenna combiner channel is for MINI DAMA?

A

Channel A

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7
Q

Function of the antenna combiner.

A

RCV: simultaneously receives from all four antennas, combines the signal to create 5db SnR and determines best antenna for transmission
XMIT: routes antenna selection and transmission to RF antenna switch

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8
Q

Which card in the antenna combiner determines the best antenna by sampling reception signals or by receiving operator entered antenna selection commands from the ODS.

A

Digital Signal Processor

DSP

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9
Q

When the antenna combiner BIT is initiated the BIT indicator light does what?

A

Illuminates steady for 10 seconds then flashes for 10 seconds.

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10
Q

Antenna combiner “OP INIT” pushbutton.

A

When depressed initializes combiner for normal operations.

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11
Q

The antenna combiner thermal fault indicator illuminates yellow when…

A

Combiner power supply overheat condition occurs.

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12
Q

If the thermal override switch on the antenna combiner is not actuated within _______ of an overheat condition, the power supply with shut down.

A

60 seconds

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13
Q

What is a visual indication of a completed BIT of the antenna combiner?

A

The active antenna lights will cycle.

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14
Q

The antenna combiner switch on the TACCO power control panel applies/removes power to what?

A

Antenna combiner

Preamp/diplexers

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15
Q

Regarding the MINI DAMA this card allows for the encryption and decryption of TDMA/DAMA Orderwires.

A

KGV-11 TRANSEC card

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16
Q

The PA overtemp indicator on the MINI DAMA power amplifier is…

A

Not used

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17
Q

Function of the MINI DAMA Power Amplifier.

A

Amplifies transmission signals developed by the Modem R/T.

Output is 100 watts or 20dB

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18
Q

System Critical message

A

Indicates equipment failure.

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19
Q

How many systems critical messages can be stored at one time?

A

Eight

20
Q

Mode critical message.

A

Normally indicates equipment configuration change.

21
Q

What is the uplink frequency range?

A

292 - 318 MHz

22
Q

What is the downlink frequency range?

A

243 - 270 MHz

23
Q

What is TDMA

A

Time Division Multiple Access

-Method of multiplexing data streams to allow multiple users access to the same satellite channel.

24
Q

What is DAMA?

A

Demand Assigned Multiple Access

  • Uses TDMA to have multiple users on one channel
  • Allows users to give the channel during periods of inactivity
  • Authorized users are allowed satellite access on demand
25
Q

At what temperature will the “HIGH TEMP” indicator on the MATT illuminate?

A

160*F

26
Q

What is the difference between the MATT blocks?

A

The cryptographic cards used to decrypt incoming broadcasts.

27
Q

What is the required SNR for reliable imagery transmission?

A

52 dB

28
Q

What is the required SNR for reliable voice transmission?

A

47 dB

29
Q

What does OASIS stand for?

A

Over the horizon Airborne Sensor Information System

30
Q

Where is the UHF-3 cone of silence?

A

Extends 30 degrees on either side of the aircraft nose.

31
Q

Caution associated with the antenna combiner

A

The thermal override switch should only be used in emergencies, continued use in overtemp condition will damage to the unit.

32
Q

What two signals does MATT receive from the antenna combiner?

A

Channel B, and C/D summed

33
Q

How long does a BIT halt the signal processing inside the ate combiner?

A

15 seconds

34
Q

How long does initialization halt signal processing in the antenna combiner?

A

1 minute

35
Q

General description of the Mini-DAMA system.

A
  • SATCOM system that supports exchange of secure battle group coordination data, imagery, and voice.
  • Works on TDMA or non-TDMA
  • 25k and 5k
36
Q

How many I/O ports does the Mini-DAMA MODEM have? What are they used for?

A

-8 ports
-4 I/O ports are accessible
-Three are configured:
Port 1. KG-84A #1(imagery)
Port 2. UHF-3 ANDVT(voice)
Port 3. KG-84A #2(OTCIXS)

37
Q

Function of the KGV-11 TSEC

A

Encryption and decryption of TDMA order wires.

38
Q

What is the difference between 5k and 25k?

A
  • Both capable of transmitting data and voice

- 25k has more time slots, bandwidth, and user capability

39
Q

MATT block 1 uses what type of cards for data decryption?

A

IBS-S: KGV-25

IBS-I: KGV-26

40
Q

MATT block 2 uses what type of cards for data decryption?

A

IBS-S: KGV-113

IBS-I: KGV-26

41
Q

MATT block 3 uses what type of cards for data decryption?

A

IBS-S: KGV-113

IBS-I: KGV-26A

42
Q

How long does it take to download MATT software from the TDP?

A

10-15 minutes

43
Q

If the TDP is not installed or the and/or the ethernet lines are terminated and not jumped what systems will be lost?

A

No online control of AIMS or ALR-95

44
Q

Do both drives have to be loaded to operate the TDP?

A

No, the ODS will work without the IP drive.

45
Q

GFCP

A

Performs interface between the DCMS, MATT, CARP, AND ODS.

46
Q

CARP

A

Receives ISAR track data and GPS time and ownership updates.

47
Q

What happens when the OP INIT push button on the combiner is pressed?

A

Initializes the combiner for normal operations

  • internal calibration is done to compensate for various paths in side the combiner and stores results in the non volatile memory.
  • status message is sent to the TDP.

NATOPS (30 decks)

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