9A47 B
 On Figure 9A-3, when measuring the frequencies, you find that the VCO is running at 34.5 MHz. f1 is at 34.4 MHz.
A. This is within system and measurement accuracies.
B. You need to look further to find the problem within the PLL.
C. Replace the Low pass filter.
D. Replace the gain block Av.
