I bought a GLOBO LSP04H from local market.
It has a 25 MHz XTAL with a 3566 PLL
I plan to use an external GPS lock from a NEO7 GPS.
Is it importand to this PLL chip which x-XTAL pin I will use for external clocking?
I have seen OZ2OE mods but in my case the XTAL traces are below the PCB and I am not sure which 3566 pin goes to each XTAL pin.
73 de George SV1BDS
If you look at the xtal terminals with an oscilloscope - before removing the xtal of course - it is easy to see which is input and output of the onchip oscillator. The terminal having lower amplitude and cleaner signal is the input. Where you can inject external LO.