ocxo current sense saturate
From Tom:
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eRTM has a 0.5 ohm shunt resistor, so for the "nominal" current, the output voltage of the diff amp is 150 mA * 0.5 ohm * 2 (diff gain) = 150 mV.
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WR2RF has a 0.05 ohm shunt, so the voltage at the output (expected) is 15 mV. This is way below the LTC1678's Volmin @ 15V Vdd/0V Vss (80 mV). So no chance it will work on the WR2RF without modifications to the board.