252 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide
Baseband Generators
A2 Vector BBG Assembly Troubleshooting
13.Again, the signal on the spectrum analyzer should now resemble that
shown in Figure 12-4 and the UNLEVEL indicator should be off.
Figure 12-4 I and Q Inputs Modulated
14.If either input does not appear to be working, verify that the cables
connecting the inputs to the A2 Vector BBG assembly are properly
connected and not damaged, as shown in Figure 12-5. (For option 1EM
see Figure 14-21).