IDW: SSES Flashcards
ELF
One-Way sub communications
3Hz to 30Hz
SLF?
Provide communication services for subs at a certain depth
30 Hz to 300 Hz
LF
8 channels of frequency-division multiplex traffic
30 KHz to 300 KHz
HF
Been around since WWI. AM radio & commercial distress.
3MHz to 30MHz
VHF
FM radio & aircraft communications
30 MHz to 300MHz
UHF LOS
Tactical voice
SHF
Radar and satellite comms
UHF SAT
Tactical voice and data
EHF
Satellite comms
Multiplexing
Multiple analog message signals or digital data streams are combined into one signal over a shared medium
Modulation/Demodulation
Putting information in/out of a waveform
Keying
Inserting noise or data onto a frequency (morse code)
Sampling
The higher the sampling rate the better the quality of the signal will be
Layers
The ionosphere(all radio waves are here) is composed of 4 layers: (lowest)D, E, F1 and F2(highest)
Radio Waves
Ground Waves and Sky Waves
Amplitude Modulation (AM)
Power of a wave to convey information
Frequency Modulation (FM)
Frequency of a wave to convey information
Half duplex
One way flow (HYDRA)
Full Duplex
Messages sent and received at the same time (cell phone)
Simplex
Communication in one direction (1MC)
Define Electronic Warfare
Protection of our use of the electromagnetic spectrum
Electronic Protect
Protecting our forces from adversary EW; EMCON
Electronic Attack
Redirecting enemy attacks; Jamming
Electronic Support
Gaining intel on foreign units; SSES
Ship Signal Exploitation Space
CTRs, CTMs and CTIs work center. Provide INDICATIONS and WARNING to the ship.
HF (antenna)
AS-142 nicknamed WHIP
V/UHF (antenna)
AS-4293A nickname Lampshade
HF DF and V/UHF DF (antennas)
Not on carriers; trick question
Decimal
10 base
Binary
Base of 2
Octal
Base of 8
Hexadecimal
Base of 16
Signals Analysis
Classifying whether it’s maritime or war
Cryptanalysis
Study of techniques to encrypt or circumvent the information
Traffic Analysis
Study of external variables of communications networks