We have a couple of them at my work. 5 MHz in, 100 MHz out. The Kvartz HM75-01Hydrogene masers has a 100 MHz output but thatport is full of spurs, so we use Wenzel PLO's thatprovides a Clean 100 MHz signal from the 5 MHzoutput from the maser. Know then that the Wenzel PLO's are sensitive to the input Power levelof the external reference. The datasheet says one thingbut  the phase noise  of the locked output signal won't look very good at allif the Reference Power is approaching the maximum specified input level... Ulf Kylenfall - SM6GXV

On Mon, Nov 13, 2017 at 12:57 PM, Ulf Kylenfall via time-nuts < time-nuts@febo.com> wrote: > > Know then that the Wenzel PLO's are sensitive to the input Power levelof > the external reference. The datasheet says one thingbut the phase noise > of the locked output signal won't look very good at allif the Reference > Power is approaching the maximum specified input level... > Thanks for the info. I am driving it with 38.4 MHz from an 8642A signal generator, locked to it's 10 MHz OCXO, not perfect but it has aged pretty well and it is within 0.1 Hz of 10 MHz. The Wenzel datasheet says nothing about the phase noise when locked. I will adjust the input level to get the best phase noise. Can you tell me how far off 100 MHz it is when unlocked? I am trying to determine if mine is typical or partially broken. Thanks again, Mark W7MLG