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RSLC Commo

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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 characteristi...

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  • February 2, 2024
  • 10
  • 2023/2024
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RSLC Commo
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)

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