Greetings All: There is a very cheap source of very high stability reference available to everyone. It is the 1 PPS from almost any second hand OEM level GPS receiver. I have one here that cost $20
Greetings All: There is a very cheap source of very high stability reference available to everyone. It is the 1 PPS from almost any second hand OEM level GPS receiver. I have one here that cost $20 U