2 types of HF propagation - ✔✔✔Ground wave
Sky wave
3 components of HF ground wave signal - ✔✔✔Direct wave
Surface wave
Ground reflected wave
3 factors that influence LOS range - ✔✔✔Frequency of operation
Radio output power
Antenna height
4 factors that affect ground waves - ✔✔✔Electrical characteristics of the earth
Height of antenna
Power output and frequency of transmitter
Shape and conductivity of the earth
AN/PRC 150 HF power output - ✔✔✔20 watts
AN/PRC 150 LOS range - ✔✔✔7-10 km
AN/PRC 150 VHF power output - ✔✔✔10 watts
AN/PRC freq range - ✔✔✔1.6-60 MHz
, ASIP freq range - ✔✔✔30-87.975 MHz
ASIP power output - ✔✔✔4.0-4.4 watts
Common LOS radios - ✔✔✔ASIPS
MBITR
MBITR2
Harris AN/PRC 152
Does HF commo use satellites? - ✔✔✔No, it uses the earth's atmosphere
How can LOS be increased? - ✔✔✔Increase antenna and/or radio power
How can you estimate the FOT? - ✔✔✔85% of MUF
How fast do radio waves travel? - ✔✔✔Speed of light
How many channels are on the MBITR channel rotary knob? - ✔✔✔16
How many keys are required to be loaded for HPW operations and what are they? - ✔✔✔2 keys:
SATELLITE TSK
KG-84 TEK
How many layers are in the ionosphere during the day? - ✔✔✔4 (D, E, F¹, F²)