I'm looking for info on behavior of a PLL (with VCXO) when the reference
comes and goes periodically. When the reference is gone, the PLL will
"flywheel" according to whatever the loop filter does. (we can turn off
the "input" to the filter, so we're not trying to track noise)..
What I'm particularly interested in is the behavior in the PLL when the
reference returns.
The overall situation is where we are trying to make a frequency/phase
measurement over 10-100 seconds, where the reference has a 50% duty
cycle, and is on for a second, off for a second.
I can fairly simply model this, or just try it, but I'm looking for some
references to an analytical approach.
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