1.

Show that a specification of 0 dBm 2 dBm is an impossible statement and write a correct statement for it.

2.

Solve for the total signal level through the receiver using milliwatts to obtain the answer, and then solve for the output in dBm for the above receiver. Compare your answers. Note: Try the dB method without using a calculator.

3.

An oscillator generates a center frequency of 1 GHz at 1 mW. The largest spurious response, or unwanted signal is at a power level of .01 mW. How would you specify the spurious response in dBc? What would the power be in milliwatts for a spur at ?40 dBc?

4.

A system has been operational for the past 3 years. A need arose to place a limiter in the path between the antenna and the LNA to avoid overload from a newly built high power transmitter. The limiter has 1.5 dB of loss. How will this affect the ability to receive low level signals. What could you do to overcome the loss?

5.

What is the diameter of a parabolic antenna operating at 5 GHz, at an efficiency of .5 and a gain of 10 dB?

6.

What is the freespace attenuation for the system in problem 5 with a range of 10 nautical miles?

7.

What is the noise level at the LNA given that the bandwidth is 10 MHz and the LNA noise figure is 3 dB with T _o =