Description
This breakout board offers a simple convenient way of interfacing with the DB9 connector of the popular FE-5680A rubidium frequency standard!
It includes an on-board 5-volt regulator in order to properly power it without any fuss. This can be turned off by removing the red jumper if you would prefer to power it externally.
When the frequency standard doesn’t have a lock (normally during the warm-up period), an indication LED lights up.
The 10MHz signal is accessed through the SMA connector on the front that’s routed from pin-7.
Double check the version of your FE-5680A before ordering! Different versions have different pinouts. This is for the following pinout:
Pin 1: 12v-15v DC
Pin 2: Ground
Pin 3: High when no lock, low when locked
Pin 4: 5v DC (provided on the breakout board)
Pin 7: 10MHz signal out
This for the breakout board, and does not include the FE-5680a that is shown in the photos.
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