In making the single-tone interference test, Wave Analyzer Model 302A
is selected as the test instrument. This test set is selected because
it has the capability to
furnish a random-noise signal as well as a test tone.
furnish any test tone within its tuning range when using the BFO.
select the interfering tone frequency on the line and measure its
Assume that you are making a test for maximum change in
frequency. You can tell that the audio frequency has changed by
listening first to one frequency, then the other.
comparing the two frequencies by means of an oscilloscope trace.
Assume that you are performing
circuit shown in figure 1-12.
Exercises 14 through 18 are based on this situation.