Some minor mods are required to the PulseGen card as a 50 Ohm driver These involves removal of the Oscillator R/C parts. If you order a PulseGen card from us on Tindie please let us know in the notes with your order and we will pre-build it with these mods.
Schematic Modifications
PCB Modifications
The PPS out of the GPS gets attached to the pad as shown below. I used Superglue to hold the wire to the pad.
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