EHF & WGS Guide

Question 1

Nomenclature of EHF terminal?

Answer 1

USC-38(v)2

Question 2

List 7 things required to bring up EHF?

Answer 2

Timing
Crypto
Navigation
Ephemeris Data
Adaptation Data
Dry Air
Chilled Water

Question 3

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

Answer 3

From HPA Dummy Load menas no TX.

Question 4

What are the black keys and their classification?

Answer 4

Unclass; TAC-1, Cover, and Downlink.

Question 5

What is TAC-1 used for?

Answer 5

Allows access to satellite beams.

Question 6

What is cover used for?

Answer 6

Privilege level used to control satellite and communication functions.

Question 7

What is downlink used for?

Answer 7

Common to all satellite beams.

Question 8

What are the red operation keys?

Answer 8

EHF SKL KEYS

Question 9

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

Answer 9

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

Question 10

What navigational inputs are required?

Answer 10

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

Question 11

What is A-data?

Answer 11

Adaptation data

Question 12

What is System-data?

Answer 12

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

Question 13

What is Terminal-data?

Answer 13

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

Question 14

What is E-data?

Answer 14

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.

Question 15

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

Answer 15

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

Question 16

What type of cooling is used for EHF?

Answer 16

Chilled water

Question 17

List EHF antenna and locations.

Answer 17

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

Question 18

How many gyros per antenna?

Answer 18

2

Question 19

How many LDR ports are there? MDR?

Answer 19

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.

Question 20

What beam is used for LDR?

Answer 20

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

Question 21

What is required before you can acquire MDR?

Answer 21

LDR

Question 22

What type of MDR beam would we use?

Answer 22

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

Question 23

What does XMT/RCV; XMT/RCV mean?

Answer 23

We are up on LDR/MDR.

Question 24

List CCI for EHF.

Answer 24

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

Question 25

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

Answer 25

2400

Question 26

What are MDR ports 15 and 16 used for?

Answer 26

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

Question 27

What does DUCA stand for? NSB?

Answer 27

Distributed user coverage antenna and nueller spot beam.

Question 28

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

Answer 28

EHF Handbook

Question 29

What type of multiplexing does EHF use?

Answer 29

Time division multiple access

Question 30

How many LDR timeslots are there?

Answer 30

7. MDR? 237

Question 31

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

Answer 31

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.

Question 32

What is an ESP and what information is on it?

Answer 32

EHF service plan

Question 33

What is ATIP?

Answer 33

Advanced TDMA interface process.

Question 34

What is special about the data rate for CT TIP?

Answer 34

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

Question 35

What is Subnet A and B for CT TIP?

Answer 35

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

Question 36

What is SOL?

Answer 36

Sequential order list.

Question 37

Who establishes for SOL for a net?

Answer 37

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

Question 38

What is predicted SNR vs. measured SNR?

Answer 38

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

Question 39

Describe what your QUAL will be based on?

Answer 39

Your DNLK.

Question 40

What does forced mean in regards to timeslots?

Answer 40

Assigned

Question 41

Why are LDR timeslots not assigned on the ESP?

Answer 41

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

Question 42

What is crosslinking?

Answer 42

Expand range by going STATION-SAT-SAT-STATION

Question 43

What is initial binding?

Answer 43

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.

Question 44

WGS

Answer 44

Wideband Global System

Question 45

What is a SAR? SAA?

Answer 45

Satellite access request | Satellite access authorization

Question 46

What is GAR? GAA?

Answer 46

GBS access request | GBS access authorization

Question 47

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

Answer 47

45 days prior to underway

Question 48

What information can be found on an SAA?

Answer 48

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

Question 49

What does EBEM stand for?

Answer 49

Enhanced bandwidth efficient modem

Question 50

List EBEM settings.

Answer 50

``` 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 ```

Question 51

What does ESEM stand for and what does it do?

Answer 51

Enhanced service efficient modem | Provides own encryption

Question 52

What is the nomenclature for the WGS terminal?

Answer 52

WSC-6(v)5A

Question 53

List antenna for WGS.

Answer 53

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

Question 54

How do you acquire the satellite?

Answer 54

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.

Question 55

How do you input the frequency on the terminal?

Answer 55

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

Question 56

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

Answer 56

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

Question 57

Why can we have two WGS missions?

Answer 57

We have two EBEMS.

Question 58

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

Answer 58

Operational commands and then setup AMP.

Question 59

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

Answer 59

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

Question 60

How do you conduct a power balance?

Answer 60

Call the gateway.

Question 61

List reasons to conduct power balance.

Answer 61

Low Eb/High Eb No eb Balance Resources

Question 62

What is the FIREBRED?

Answer 62

Communication analyzer, in house Q.A. checks.

Question 63

Setting for FIREBRED?

Answer 63

Data, Gen clock, timing, set up interface.

Question 64

What does BERT stand for?

Answer 64

Bit error rate test

Question 65

What is a bi-directional loop?

Answer 65

Sends data to self and to station.

Question 66

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

Answer 66

Lineup protocol down loop

Question 67

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

Answer 67

TR

Question 68

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

Answer 68

Go to ext loop

Question 69

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

Answer 69

Fiber Optic Media convertor | Converts fiber to copper or serial

Question 70

What bands does WGS use and what are their ranges?

Answer 70

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

Question 71

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

Answer 71

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

Question 72

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

Answer 72

After action report | 72 hours