COMMS SYSTEM OPERATIONS Flashcards
Line of sight limits the range of radiotelephone how many miles?
20 to 25 miles ( the range)
How many words/min can a radio teletypewriter transmit?
100
How do we transmit pictures or charts?
FAX (facsimile)
What is the freq range for EHF?
30GHZ-300GHZ
SHF freq range?
3GHZ-30GHZ
What order do the freq go in?
EVLHVUSE
300MHZ- 3GHZ freq name?
UHF
30MHZ0 300MHZ freq name?
VHF
What is the range for HF?
3MHZ-30MHZ
What is the range for MF? (med freq)
300KHZ- 3MHZ
30KHZ- 300KHZ freq range?
LF
What order do the HZ go in?
hz,khz, mhz, ghz HKMG
3KHZ- 30KHZ freq range?
VLF
What starts the freq range?
ELF, up 300HZ
What does not lose much of its signal 100s of feet below water?
ELF ( the elf likes to swim)
Broadcast one way transmission freq range?
VLF 3KHZ-30KHZ
Communicates over long distance, fixed trunks?
point to point
MESSAGE CIRCUIT between two points that are switching and message distro points?
trunk
Above 30MHZ what is decreased?
refraction and ground wave
Method of operation that communicates at the same time, in both directions on 2 freqs……
full duplex (fdx)
Daily capacity for AUTODIN system?
5 million