A question to clarify the function of MUXOUT when set as Lock detect, during steady state operation.
Specifically, how does the Lock detect (MUXOUT) act if Ref Osc input is lost during steady state operation?
Meaning, after a successful cal and programming for frequency, what does MUXOUT (set as Lock detect) output if the Ref Osc input is lost? (meaning lost after cal)
Datasheet 7.3.6. sections imply LO Lock indicates successful cal and programming at time of initial programming, but does not accurately reflect, nor update, the LO Lock state during operation following a cal. (?)
Is this actually an operating LOCK detect? or... only indication of successful programming at time of Cal (i.e., at time of frequency set.)
Follow on: I presume the LMX2694 (or other integrated VCO synths) lose lock if the Ref OSCIN is lost? How is loss of lock indicated if the Lock detect is not updated?
Trying to clarify some datasheet confusion.
thank you for your help,