The TwinRX daughterboard is composed of two PCBs, the Intermediate Frequency (IF) board and the RF board. There are two functionally identical revisions of TwinRX at the moment. Please check the back of your TwinRX to see which you have. The schematics for TwinRX revision B should answer most possible questions. If you have any further questions please email support@ettus.com.

TwinRX Revision A  - (159685A-01)
 * IF Board Revision B - (158671B-01L)
 * RF Board Revision C - (156263C-01L)

TwinRX Revision B  - (159685B-01)
 * IF Board Revision C - (158671C-01L)
 * RF Board Revision D - (156263D-01L)