Agilent Technologies FieldFox MW N9913A, Service Manual, Page: 124 / 156

7-30 N9927-90003
Repair and Replacement Procedures FieldFox Analyzer
Removing and Replacing the Measurement Group Assemblies
Replacing the Type-N RF Connectors and RF Cables
1. Separate the front and rear cases. See “Separating the Front and Rear Cases” on page 7-10 .
2. Remove all measurement group assemblies as one unit. Refer to “Removing All Measurement
Group Assemblies as One Unit” on page 7-27 .
3. Remove the RF top assembly. Refer to “Replacing the RF Top Panel Assembly” on page 7-29 .
4. Refer to Figure 7-20 . Disconnect the cable connector nut on cable W1 or W2, depending on which
connector or cable is being replaced. Do not attempt to remove the cable, just release the connector
nut.
5. Remove the two screws (item 2) from the type-N RF connector to be replaced.
6. Lift the type-N RF connector upwards and out of the RF bottom shield.
7. The RF input cable can now be replaced by disconnecting the other end of the cable and removing it.
When installing the new cable, do not tighten either of the cable connector nuts until both of them
have been installed finger tight.
8. Remove the RFI O-ring.
9. Remove the old insulator and install a new one.
10. Position the new type-N RF connector in the RF bottom shield, making sure that it aligns with the
cable connector underneath. Loosely install the cable connector nut.
11. Install a new RFI O-ring over the new type-N RF connector in the position shown.
12. Loosely reinstall the two screws (item 2). Note the location for these two screws in the illustration.
To ensure proper alignment, install two additional screws, finger tight, in the two empty holes in the
type-N RF connector, then tighten the two screws that secure the connector. Remove the two
alignment screws.
13. Tighten the cable connector nut(s) on cable W1 or W2.
14. Perform the steps under “Post-replacement Procedure” on page 7-44 .
Figure 7-20 Replacing the Type-N RF Connectors and RF Cables