AN5466

2.5.2.4 Monitoring JAPLL Phase Detector Output

The following figure shows the state machine which reads the JAPLL phase detector output.

Figure 2-13. JAPLL Phase Detector Output Read

For the JAPLL to be G.8262 compliant, the loop bandwidth has to be the minimum so that the averaging frequency can be within the Wander cut-off frequency limits, which is 1–10 Hz.

The sampling rate is set to 11.4 ms, and the total number of samples to 64, the averaging frequency is 1.36 Hz which falls in the range of 1–10 Hz.

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