Flashcards in EHF Deck (34)
• Nomenclature of EHF terminal?
• List 7 things required to bring up EHF?
Timing, Crypto, Navigation, Ephemeris Data, Adaptation Data, Dry Air, Chilled Water
• What should the status of the HPA display when in IDLE?
From HPA Dummy Load means no TX.
• What are the black keys and their classification?
Unclas ; TAC-1, Cover, & Downlink.
• 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
• What is the red unique key used for?
Encrypts the black keys
• What are the red operational keys?
EHF SKL KEYS
• 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.
• 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)
• What is A-data?
What is System-data?
Defines which satellites are out there and which ones you can join.
What is Terminal-data?
Gives ships specific Terminal ID (BHR is 2489) and defines block zones for the ship.
• 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.
• How do you format A-data and E-data?
Delete all Misc. letters until it looks like EHF Handbook.
• What type of cooling is used for EHF?
• List EHF antenna and locations?
Two AS-4294; On top PRIFLY, On SPN-35 platform.
• How many gyros per antenna?
• 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.
• 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.
• What is required before you can acquire MDR?
• 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.
• What does XMT/RCV; XMT/RCV mean?
We are up on LDR/MDR.
• List CCI for EHF?
KYV-5, KIV-7M, KGV-11.
• What does the KYV-5 limit the data rate to?
• What are MDR ports 15 and 16 used for?
15 = DSVT, 16 =T1…These are both not used by us.
• What does DUCA stand for? NSB?
Distributed User Coverage Antenna & Nueller Spot Beam
• Where can you find a list of all Terminal ID’s?
• What type of multiplexing does EHF use?
Time Division Multiple Access
• How many LDR timeslots are there?