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Flashcards in EHF Deck (34)
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1

• Nomenclature of EHF terminal?

USC-38(v)2

2

• List 7 things required to bring up EHF?

Timing, Crypto, Navigation, Ephemeris Data, Adaptation Data, Dry Air, Chilled Water

3

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

From HPA Dummy Load means no TX.

4

• What are the black keys and their classification?

Unclas ; TAC-1, Cover, & Downlink.

5

• What is TAC 1 used for?

Allows access to satellite beams. Cover? Privilege level used to control satellite and communication functions . Downlink? Common to all satellite beams

6

• What is the red unique key used for?

Encrypts the black keys

7

• What are the red operational keys?

EHF SKL KEYS

8

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

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

9

• What navigational inputs are required?

Lat/Long: Manually entered, Heading: SINS(Shipboard Internal Navigation System)(WSN-7),Speed: Manually entered ,Pitch/Roll: SINS (WSN-7)

10

• What is A-data?

Adaptation Data

11

 What is System-data?

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

12

 What is Terminal-data?

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

13

• What is E-data?

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.

14

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

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

15

• What type of cooling is used for EHF?

Chilled Water

16

• List EHF antenna and locations?

Two AS-4294; On top PRIFLY, On SPN-35 platform.

17

• How many gyros per antenna?

2

18

• How many LDR ports are there? MDR?

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.

19

• What beam is used for LDR?

Uses Earth Coverage beam W/ a 17.5˚ wide beam which covers 4000 NM; Which provides Network & PTP W/ Data and Voice.

20

• What is required before you can acquire MDR?

LDR

21

• What type of MDR beam would we use?

Uses Nuller Spot Beam & Distributed User Coverage Antenna. NSB is 1˚ wide (400 NM), and DUCA is 1˚ wide (400 NM). Services Provided are; Dual Simplex for IP services, Voice Nets or PTP calls at 2400 bps, TIP (TMDA Interface Processor) for IP services.

22

• What does XMT/RCV; XMT/RCV mean?

We are up on LDR/MDR.

23

• List CCI for EHF?

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

24

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

2400.

25

• What are MDR ports 15 and 16 used for?

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

26

• What does DUCA stand for? NSB?

Distributed User Coverage Antenna & Nueller Spot Beam

27

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

EHF Handbook

28

• What type of multiplexing does EHF use?

Time Division Multiple Access

29

• How many LDR timeslots are there?

7

30

MDR?

237