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ASSIGNMENT 3
Textbook assignment: Chapter 3, “Quantitative Measurement,” pages 3-26 through 3-39. Chapter 4,
“Qualitative Measurements,” pages 4-1 through 4-14. Chapter 5, “Introduction to Waveform
Interpretation,” pages 5-1 through 5-35.
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3-1. The AN/URM-120 in-line wattmeter is
capable of measuring which of the
following values?
1. Rf levels up to 500 watts between 30
MHz and 1,000 MHz
2. Rf levels up to 1 kW between 2 MHz
and 30 MHz
3. Both 1 and 2 above
4. Af levels up to 500 watts between 1
kHz and 15 kHz
3-2. When rf power is applied to a bolometer,
the heat generated by the semiconductor
bead results in which of the following
characteristic changes?
1. A capacitive change
2. An inductive change
3. A resistive change
4. A frequency change
3-3. The Hewlett-Packard 431 C power meter
is capable of measuring power within
which of the following frequency ranges
in a coaxial system?
1. 1 MHz to 9 MHz
2. 10 MHz to 18 GHz
3. 41 GHz to 100 GHz
4. 101 GHz to 1,000 GHz
3-4. Calorimeters measure power by
converting the input electromagnetic
energy into which of the following
forms?
1. Heat
2. Dc power
3. Pulsed rf energy
4. Electrodynamic energy
3-5. Which of the following relationships
exist(s) between the temperature increase
of the calorimetric body of a static
calorimeter and the applied power?
1. The temperature increase is
proportional to the frequency of the
applied power
2. The temperature increase is inversely
proportional to the amount of applied
power
3. The temperature increase is directly
proportional to the time of the applied
power
4. Both 2 and 3 above
3-6. Which of the following statements
describe(s) the method of using a twin
calorimeter?
1. Rf power is applied to one
calorimetric body and the other body
acts as a temperature reference
2. The steady-state temperature
difference between the two
calorimetric bodies is used as a
measure of rf power
3. Both 1 and 2 above
4. Power is applied to both calorimetric
bodies through a directional coupler
3-7. Flow calorimeters are classified by the
type of measurement performed, the type
of heating used, and what other
characteristic?
1. Number of calorimetric bodies
2. Type of circulation method used
3. Type of rf loads that they employ
4. Number of calorimetric fluids used
