High Frequency
what is the frequency range of HF?
3-30 MHz
what is a signal transmitted from a satellite TO an earth terminal called?
Downlink
what is modulation?
Changing of from one state to another
"Mixing" signals to form a new output
converts an Intermediate Frequency up to a higher frequency
Block Up-converter
what height is a geosynchronous orbit about the equator?
23,000 miles
how is HF Beyond line of sight communications possible?
the signal bounces of the ionosphere to its destination
how many GPS satellites does precise timing require
4
a carrier wave (carrier spike) is
an unmodulated signal
increases the power of a received signal
Low noise amplifier
What beam type is used to cover the smallest geographical areas?
Spot Beam
what is the wavelength for 10 MHz
30 meters
what does IW stand for
integrated waveform
What is the formula to find the wavelength of a given frequency?
wavelength = velocity / frequency
wavelength = speed of light (c or 300,000 Kms) / frequency
performs the modulation and demodulation of a given signal
Modem
what frequency range does KU operate in?
12-18 GHz
What does ALE do?
automatically determines the best predetermined frequency to use
What does the signal to noise ratio measure
the amount of desired signal compared to the background noise
a resonant antenna is used for what?
1 specific frequency
in the TX path this component increases the power to allow the signal to reach the satellite
High Powered Amplifier (HPA) we use SSPA's
geostationary orbits are above which man made imaginary line
the equator