Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide 89
Self Test
Self Test Descriptions
1512 RT – BB FBI
This test checks the flexible bus interface (FBI) line for connectivity from the A2
Baseband Generator to the A7 Real Time Baseband Generator assembly. The
FBI line consists of a differential pair of signals. The FBI line originate from the
A2 Baseband Generator assembly ARB FPGA and goes to the A7 Real Time
Baseband Generator assembly FX FPGA. The ARB FPGA serially broadcasts
16-bit data across the FBI line.
The testing involves broadcasting the FBI line with different 16-bit patterns. A
register within the FX FPGA that contains the deserialized FBI signal is read
which should be the same pattern that was sent.
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