EST 38

How many degrees is the phase difference between the I and Q color signal carrier in colored TV sets?

• 180

• 270

• 90

• 45

What are the typical transmitter- receiver spacing for microwave relay?

• 10-20 miles

• 10-30 miles

• 5-50 miles

• 10-50 miles

Indicate which of the following statements about the advantages of the phase discriminator over the slope detector is false:

• Much easier alignment

• Better linearity

• Greater limiting

• Fewer tuned circuits

What limits the transmitter-receiver spacing for a microwave relay?

• gain of antenna

• curvature of the earth

• frequency assigned

• antenna sites

A GPS satellite has how many orbit period in hours?

• 24

• 12

• 18

• 36

An AM transmitter supplies a 10 kW of carrier power to a 50 ohm load. It operates at a carrier frequency of 1.2 MHz and is 85% modulated by a 3 MHz sine wave. Calculate the RMS voltage of the signal.

• 825 W

• 262.61 V

• 1166.7 V

• 825 V

The hue of the color sync burst phase

• red

• blue

• magenta

• yellow-green

It is known as the unit of pitch.

• sone

• phon

• mel

• dB

What is the typical value of vidicon dark current?

• 3 mA

• 0.2 μA

• 2 μA

• 0.5 μA

For a transmission line with incident voltage equal to 8 volts and reflected voltage equal to 1 volt, calculate the standing wave ratio.

• 0.36

• 1.115

• 1.29

• 1.544