Figure 4-6.
Detector response curve.
12. Assume that an FM receiver operating in the 27.0- to 38.9-MHz band is not
tracking properly and must be aligned by connecting a signal generator to the grid
of the RF amplifier.
The frequency at which the receiver tuning control and the
signal generator should be set while adjusting the trimmer capacitors is
approximately
a. 4.3 MHz.
c.
32.9 MHz.
b. 27.0 MHz.
d.
38.5 MHz.
13. To illustrate the effect of using a low-resistance voltmeter in aligning a
receiver, assume that the voltmeter shown in figure 4-7 has a sensitivity of 20,000
ohms per volt and the indicator is deflected full scale to read 5 volts. If the
voltmeter is replaced by one having a sensitivity of 1,000 ohms per volt and a
full-scale deflection of 5 volts, the voltage drop across the meter will be
a. less than 1 volt.
b. between 1 and 3 volts.
c. between 3 and 5 volts.
d. greater than 5 volts.
50
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