Keysight Technologies E8257N Installation Note page 19

Connect W135 to W122 (For Instruments with Serial Prefixes >US4805/MY4805)
Refer to Figure 7 and Figure 8.
1. Position the signal generator with rear panel facing you.
2. Remove the zip tie from the 1 GHz out cable (W135) on the rear panel, refer to Figure 8.
3. Position the signal generator with the A31 Motherboard on top.
4. Remove the 50 Ohm terminator from W122.
5. Connect the W135 to W122.
Figure 8 W135
19