7-46 Service Guide E8364-90038
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the 30-dB Fixed Attenuators (E8362C only) E8362C, E8363C, E8364C
Removing and Replacing the 30-dB Fixed Attenuators (E8362C only)
Tools Required
• T-10 TORX driver (set to 9 in-lb)
• T-20 TORX driver (set to 21 in-lb)
• 1/4-inch open-end wrench
• 5/16-inch open-end torque wrench (set to 10 in-lb)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-20 for this procedure.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to “Removing the Covers” on page 7-6. Position the analyzer bottom side
up as shown. It may be convenient to raise the receiver deck to provide better access. If necessary, refer
to “Raising and Removing the Receiver Deck” on page 7-8.
3. Identify the fixed attenuator to be removed.
4. Disconnect the two semirigid cables (item
①) from the attenuator:
• Use a 1/4-inch open-end wrench, adjacent to the connector to be removed, to hold the attenuator in
a fixed position.
• Use a 5/16-inch torque wrench to loosen the cable connector.
• Repeat for the cable connector at the other end of the attenuator.
CAUTION Be careful not to damage the center pins of the semirigid cables. Some flexing of the cables
is necessary to remove the attenuator. Do not over-bend the semirigid cables.
5. Cut the cable tie (item
➁), used to secure the attenuator, and remove the attenuator from its holder.
Observe the
CAUTION above.
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal
procedure. Refer to Table 7-2 on page 7-82.
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