Keysight Technologies N5173B EXG - Using BERT for N5172 B;82 B with Option UN7; Bit Error Rate Test; Clock Gate Function

402 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide
Assembly Replacement
B1 through B4 Fans
Figure 15-40 B1 thru B4 Fans (2 of 2)