Used the test input of the WFS patch panel to check the 45MHz transfer functions of the JAC WFS. Measurement point was at the RF monitor output of the demodulator. The attached plots show:

1. JAC WFS A segment 1 (all segments very similar)
2. JAC WFS B segment 1 (all segments very similar)
3. ASC REFL_A segment 1 (for comparison)
4. ASC POP_X segment 1 (for comparison)

Observations:

• JAC WFS B has 10x the response of all the others. 
• JAC WFS A seems to be a 36/45MHz unit, whereas WFS B seems to be a 9/45MHz unit.
• Serial # of JAC WFS A: S1300512
• Serial # of JAC WFS B: S1300504

The data sheet confirms these observations including the test input transconductance beeing 10x higher for S1300512.