The NEO-7M has a dual modulus divider to deal with the non-integer ratio of 48/10.
It sometimes divides by one number, sometimes divides by a value one less than that number.
This will almost certainly show up as phase noise on the Si4432 LO,
how bad depends on the LPF used in the Si4432 PLL.
Since it's designed for a 30mhz crystal oscillator, it probably wants a clean reference.
I do think having the NEO-7M divide 48mhz by 8 to get 6mhz out,
then multiplying by 5 should work, as per post #701.?
A?GPS disciplined Si5351 should also work.
The cheap 10 pin Si5351A wants a 25 or 27 mhz local oscillator,
I hear that driving it with a 12mhz reference sort of works but is noisy.
The Si5351C in the QFN20 is designed to take an external reference?
at anywhere between 10mhz and 100mhz.? So one could drive the Si5351C
reference with 12mhz directly from the NEO-7M, no need to discipline
the Si5351C using firmware.
Jerry, KE7ER?
?
