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Carrier Board External Interfaces
![](/download/attachments/219260002/HwInterface.png?version=1&modificationDate=1485282800000&api=v2)
+12VDC Power (Required)
- When the daugther board is plugged in, the total power draw is about 10W (+12VDC @ 0.8A)
- Carrier Board is ~5W
- Digital Daughter board is ~5W
- To prevent the boards from overheating, we require cool air to be blown from a fan
- Using a thermal electric cool on the ASIC would be an acceptable thermal management solution as well
PGP/ETH (Required)
- This SFP interface is the PGP or ETH (depending on which firmware is loaded)
- When ETH firmware is load:
ASIC (Required)
- This is the interface that the digital daughter board plugs into
-120V Bias (Optional)
- Single ended LEMO connector
- Drives the ASIC's high voltage bias
- Only required if you are doing laser testing or beam testing
SLAC EVR (Optional)
- Used for interfacing to the SLAC's linac timing system
- Used for external triggering
- +5V TTL logic levels
- BNC Connector
TTL Output (Optional)
- Currently usued in the firmware
- +5V TTL logic levels
- BNC Connector
External Differential 40 MHz Reference (Optional)
- Used for external 40 MHz timing reference
Differential LEMO