MISC From Class Review Flashcards
What is a Period of a sine wave?
The time of each cycle
What is the relationship between Period & Wavelength?
Direct Relationship
What is Scintillation? What characteristics of a sine wave does it affect and what frequencies are most affected?
Def- The effect of large particles on EMS
Affects amplitude, polarity, phase
Affects lower frequencies
What is Free Space Loss (FSL)?
Power loss as sine wave passes throug medium due to spreading
What 2 characteristics are affected by TTF?
Polarity
Frequency
What is RBW & VBW?
RBW: adjusting # of sampled being taken; X axis
VBW: adjusting sample of amplitude being seen; Y axis
What is Half Power Beam Width?
The angular separation between half-power points on radiation pattern
What is the relationship between Eb/No & BER?
Indirectly Proportional
What does EIRP stand for and what is it?
Effective Isotropc Radiated Power
- Total power of antenna compared to Isotropic radiator
What does AUPC stand for and describe it
Automatic Uplink Power Control
- Local modem adjusts power control depending on the measurement of Eb/No
What does ALC stand for and describe it
Automatic Leveling Control
- Power adjustment occurs on the satellite to meet the SNR threshold
What is CJSR?
The minimum requirement of JSR needed to effectively jam
What is Polarization?
The orientation of a wave E-field in reference to Earth’s surface
What is the purpose of RF - > IF?
IF standardizes equipment
What is a Channelizer?
The path management on a satellite
What is Modulation?
Changing carrier wave parameters to represent data
What 2 characteristics are being changed for QAMM?
Phase
Amplitude
What are the 2 types of interference? Describe them
Constructive: Two waves increasing the wave of a signal
Destructive : Two waves reducing the fidelity of a signal
