Oscillator Accuracy In the downconverter schematic shown in Figure 9-67, the labels on the oscillators include their individual frequency accuracies over temperature. The downconverter is tuned to the...

Oscillator Accuracy In the downconverter schematic shown in Figure 9-67, the labels on the oscillators include their individual frequency accuracies over temperature. The downconverter is tuned to the L1 frequency of the global positioning system (GPS), 1,575.42 MHz. The L1 signal contains a mix of navigational messages, coarse acquisition (C/A) codes, and encrypted precision P(Y) codes.

a. What are the minimum and maximum frequencies of the 2,025 MHz coarse-step oscillator? Answer in hertz.

b. What are the minimum and maximum frequencies (in Hz) of the 309.58 MHz fine-step oscillator will exhibit over frequency?

c. What is the maximum frequency range (in Hz) of the output signal (i.e., the signal at the nominal IF of 140 MHz)?

Figure 9-67

Don’t assume the two oscillators will drift in the same direction. For example, when the 2,025 MHz has drifted to +100 ppm, the 309.58 MHz oscillator may have drifted to −100 ppm.