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Advancment IT1 > EHF & WGS Guide > Flashcards

EHF & WGS Guide Flashcards

1
Q

Nomenclature of EHF terminal?

A

USC-38(v)2

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2
Q

List 7 things required to bring up EHF?

A 
Timing
Crypto
Navigation
Ephemeris Data
Adaptation Data
Dry Air
Chilled Water
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3
Q

What should the status of the HPA display when in IDLE?

A

From HPA Dummy Load menas no TX.

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4
Q

What are the black keys and their classification?

A

Unclass; TAC-1, Cover, and Downlink.

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5
Q

What is TAC-1 used for?

A

Allows access to satellite beams.

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6
Q

What is cover used for?

A

Privilege level used to control satellite and communication functions.

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7
Q

What is downlink used for?

A

Common to all satellite beams.

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8
Q

What are the red operation keys?

A

EHF SKL KEYS

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9
Q

Describe the differences between loading black keys and red operational keys?

A

Red operational keys are already encrypted, black keys need the RED UNIQUE to encrypt them.

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10
Q

What navigational inputs are required?

A

Lat/Long: Manually entered
Heading: SINS(WSN-7)
Speed: Manually entered
Pitch/Roll: SINS(WSN-7)

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11
Q

What is A-data?

A

Adaptation data

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12
Q

What is System-data?

A

Defines which satellites are out there and which ones you can join.

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13
Q

What is Terminal-data?

A

Gives ships specific Terminal ID (BHR is 2489) and defines block zones for the ship.

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14
Q

What is E-data?

A

Satellite position and velocity, Good for 42 days on MIL*, will update on its own if the satellite is acquired, may still acquire if stale but may take longer.

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15
Q

How do you format A-data and E-data?

A

Delete all misc. letters until it looks like EHF Handbook.

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16
Q

What type of cooling is used for EHF?

A

Chilled water

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17
Q

List EHF antenna and locations.

A

Two AS-4249; on top PRIFLY, on SPN-35 platform.

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18
Q

How many gyros per antenna?

A

2

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19
Q

How many LDR ports are there? MDR?

A

There are 12 ports for LDR. 4 Prim. W/max 2400bps, 4 sec. W/max 300bps, 4 RCV ports W/max 2400bps. There are 16 ports for MDR.

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20
Q

What beam is used for LDR?

A

Uses Earth Coverage beam W/a 17.5(degrees) wide beam which covers 4000 NM; which provides network and PTP W/data and voice.

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21
Q

What is required before you can acquire MDR?

A

LDR

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22
Q

What type of MDR beam would we use?

A

Uses Nuller Spot Beam and Distributed User Coverage Antenna. NSB is 1(degree) wide (400 NM), and DUCA is 1(degree) wide (400 NM). Services provided are; Dual simplex for IP services, voice nets or PTP calls at 2400bps, TIP (TMDA interface processor) for IP services

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23
Q

What does XMT/RCV; XMT/RCV mean?

A

We are up on LDR/MDR.

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24
Q

List CCI for EHF.

A

KYV-5, KIV-7M, KGV-11

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25
Q

What does the KYV-5 limit the data rate to?

A

2400

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26
Q

What are MDR ports 15 and 16 used for?

A

15 = DSVT, 16 = T1…These are both not used by us.

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27
Q

What does DUCA stand for? NSB?

A

Distributed user coverage antenna and nueller spot beam.

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28
Q

Where can you find a list of all Terminal ID’s?

A

EHF Handbook

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29
Q

What type of multiplexing does EHF use?

A

Time division multiple access

30
Q

How many LDR timeslots are there?

A
  1. MDR? 237
31
Q

For an LDR voice net, what do you need to know about timeslots for all users on the net to communicate?

A

Can’t let it auto select if ARG wants to communicate, if you use timeslot 7, you will be allocating all the data to one circuit.

32
Q

What is an ESP and what information is on it?

A

EHF service plan

33
Q

What is ATIP?

A

Advanced TDMA interface process.

34
Q

What is special about the data rate for CT TIP?

A

When more than one person is on the net, the bandwidth is allocated equally.

35
Q

What is Subnet A and B for CT TIP?

A

Subnet A is shore side always RCV only. Subnet B is our station so we set it to TX/RCV.

36
Q

What is SOL?

A

Sequential order list.

37
Q

Who establishes for SOL for a net?

A

The 1st terminal to come up on the net is established by default.

38
Q

What is predicted SNR vs. measured SNR?

A

Predicted is based on terminal type and antenna type. Measured is the current situation.

39
Q

Describe what your QUAL will be based on?

A

Your DNLK.

40
Q

What does forced mean in regards to timeslots?

A

Assigned

41
Q

Why are LDR timeslots not assigned on the ESP?

A

Minimal amount and lead of ARG or SG assigns it typically.

42
Q

What is crosslinking?

A

Expand range by going STATION-SAT-SAT-STATION

43
Q

What is initial binding?

A

Binding of 2 terminals to INT OTAR…Breaking the chain? After 6 Mo. The chain needs to broke to continue good service. 01JAN and 01JUL.

44
Q

WGS

A

Wideband Global System

45
Q

What is a SAR? SAA?

A

Satellite access request

Satellite access authorization

46
Q

What is GAR? GAA?

A

GBS access request

GBS access authorization

47
Q

How many days prior does a SAR need to be submitted?

A

45 days prior to underway

48
Q

What information can be found on an SAA?

A

Mission number, operation bands, EBEM settings, gateway settings, satellite data base number

49
Q

What does EBEM stand for?

A

Enhanced bandwidth efficient modem

50
Q

List EBEM settings.

A 
Sub mode
Data range
Mode
IF offset/IF carrier frequency
Serial rate
Inner code/Inner code rate
Timing source
Buffer size(iridium crystal timing)
Reference SAA
51
Q

What does ESEM stand for and what does it do?

A

Enhanced service efficient modem

Provides own encryption

52
Q

What is the nomenclature for the WGS terminal?

A

WSC-6(v)5A

53
Q

List antenna for WGS.

A

USC-69=CBSP
OE-581=GBS
AS-4514=DSCS

54
Q

How do you acquire the satellite?

A

Take SAA fill in information on mod, demod, up-convertor, and down-convertor, select satellite in accordance with SAA, Enter SMAT and ring seed in ESEM.

55
Q

How do you input the frequency on the terminal?

A

Set up up-convertor and down-convertor/mod. and demod.

56
Q

What is an up-convertor and a down-convertor?

A

Up-convertor is symbolic to modular. Down-convertor is symbolic to demodulator

57
Q

Why can we have two WGS missions?

A

We have two EBEMS.

58
Q

How do you check if the terminal is using the HPA or MPA?

A

Operational commands and then setup AMP.

59
Q

How do you take the terminal out of dummy load for the HPA or MPA?

A

Ensure the beam state is on the change the Comm. Mode

60
Q

How do you conduct a power balance?

A

Call the gateway.

61
Q

List reasons to conduct power balance.

A

Low Eb/High Eb
No eb
Balance Resources

62
Q

What is the FIREBRED?

A

Communication analyzer, in house Q.A. checks.

63
Q

Setting for FIREBRED?

A

Data, Gen clock, timing, set up interface.

64
Q

What does BERT stand for?

A

Bit error rate test

65
Q

What is a bi-directional loop?

A

Sends data to self and to station.

66
Q

What are you checking for in ADNS when any loop test is being conducted?

A

Lineup protocol down loop

67
Q

When circuit path is setup using a KIV-7M, what should you check for when any loop test is being conducted?

A

TR

68
Q

How do you setup an external loop on the KIV-7M and what should you check for in ADNS?

A

Go to ext loop

69
Q

What does FOM stand for and what is it used for?

A

Fiber Optic Media convertor

Converts fiber to copper or serial

70
Q

What bands does WGS use and what are their ranges?

A

KA=26.5-40.0
X=8.2-12.4
C=5.85-8.20 Ghz

71
Q

Who do we send the C4I report to and at what times?

A

To the gateway at 0400Z, 1200Z, 2000Z

72
Q

What is an AAR and how many days do you have to submit?

A

After action report

72 hours

Advancment IT1 (8 decks)

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