1. High Frequency (HF) covers the frequency range of 300 - 300 KHz 300 KHz - 3 MHz 3 MHz - 30 MHz 30 MHz - 300 MHz
2. Very High Frequency (VHF) covers the frequency range of 300 - 300 KHz 3 MHz - 30 MHz 30 MHz - 300 MHz 300 MHz - 3 GHz
3. Ultra High Frequency (UHF) covers the frequency range of 3 MHz - 30 MHz 300 - 300 KHz 300 MHz - 3 GHz 30 MHz - 300 MHz
4. Medium Frequency (MF) covers the frequency range of 3 MHz - 30 MHz 300 KHz - 300 KHz 3 MHz - 30 MHz 300 MHz - 3 GHz
5. Class A amplifier is high fidelity high efficiency biased at cut-off none of the above 6. Class B amplifier is high efficiency biased at cut-off high fidelity none of the above
7. Class C amplifier is high efficiency high fidelity biased at cut-off none of the above
8. Final amplifier is in a stage in microwave transmitter where there is a klystron tube driver stage tuner stage automatic gain control stage
9. What would prevent thermal runaway of transistor amplifier, low current use control high temperature bias stabilization application forward biasing
10. What is used as a transmission channel between the antenna and the transmitter? coaxial cable optic fiber helical cable waveguide
11. Beyond the horizon propagation is also known as, ionospheric troposcatter high frequency medium frequency propagation
12. Standard Broadcast station (AM) uses this tupe of propagation for most its signals groundwave spacewave skywave troposcatter propagation
13. One of these is not a hertz type antenna yagi dipole whip AM broadcast tower antenna
14. The main LC oscillators are the Hartley and tuned sinusoidal colpitts crystal oscillators
15. The angle between the half-power radiation points of an antenna is, critical angle refraction angle elevation angle beamwidth
16. Antenna gains are measured with reference to angle of refraction elevation angle isotropic radiator reflector
17. The product of power fed to the antenna and its power gain is, peak to peak peak envelope average peak power effective radiated power
18. Field strength of radiated waves is expressed in, volts per meter watts per meter volts watts
19. Sun-spot cycle refers to the sun's temperature that varies and causing variations in the coupler. It occurs normally every, 10th year 11th year 12th year 13th year
20. What is the highest radio frequency that will be refracted back to earth called, optimal frequency maximum frequency traffic maximum usable frequency critical frequency 21. HF utilizes what type of propagation? ground wave sky wave space wave direct wave 22. Grounded antennas are known as, yagi dipole marconi hertz 23.Satellites that is placed at the equatorial orbit are, low orbit satellite random path satellite geostationary satellite earth orbit satellite 24. In AM, the ratio of the modulating voltage over the carrier voltage is known as, deviation constant deviation index modulation index modulation constant 25. A3 emission means that the carrier is, modulated by data amplitude modulated by voice frequency modulated by voice keyed
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