Schematics of the PreFRED-AUX board

1. sheet1.pdf : Top level diagram
2. sheet2.pdf : Rec&Con1
3. sheet3.pdf : Custom_P3
4. sheet4.pdf : Rec&Con2
5. sheet5.pdf : ECL
6. sheet6.pdf : VME_bus_P0
7. sheet7.pdf : NIM
8. sheet8.pdf : VME_bus_P2
9. sheet9.pdf : POWER

Obs. The following design changes were implemented:
-soldered 180 Ohm-0402 resistors between pins 2 & 3 of U10 and U11 on the component side(Sch. 5);
-pins 1 & 2 and 11 & 12 of U21 and U22 were lifted from the pads and crossed (Sch. 7);
-on each connector NIM0, NIM1, NIM2, NIM3 a 50 Ohm-0805 resistor was soldered between the hot pin and
GND(connector case) on the solder side (Sch. 7).