14
Installation Note E8362-90004
Step 7. Remove the Old Hardware and Cables
Remove the Old Cables
(Refer to
Figure 7
.)
1. Using a 5/16-inch wrench, remove the following cables in the order listed.
• W1 A12 source 20 to A22 switch splitter
• W3 A22 switch splitter to channel R1 fixed attenuator
• W4 A22 switch splitter to channel R2 fixed attenuator
• W7 Channel R1 fixed attenuator to A28 channel R1 mixer
• W8 Channel R2 fixed attenuator to A29 channel R2 mixer
Remove the Fixed Attenuators
(Refer to
Figure 7
.)
2. Cut the cable ties (item
①
).
3. Remove the attenuators (item
②
) from the analyzer.
4. Remove the adhesive clamps (item
③
) by sliding a thin, sharp blade under the clamp and
lifting. Scrape away any excess adhesive from the bracket.
Replace the A27 and A30 Mixers
(Refer to
Figure 7
and
Figure 8
.)
5. Disconnect all RF cables (item
④
) from the mixers.
6. Remove two RF cables (item
⑤
) from the analyzer and retain for reinstallation later.
7. Remove four screws (item
⑥
) from the mixer bracket. Retain the screws for reinstallation
later.
8. Remove the mixer bracket, with the mixers attached, from the analyzer. Observe the
CAUTION
below. Disconnect the ribbon cable to allow the mixer bracket to be removed.
CAUTION
Be careful not to damage the center pins of the semirigid cables. Some flexing of
the cables is necessary when removing the assemblies. Do not over-bend them.
9. Remove the old A27 and A30 mixers from the mixer bracket by removing three screws
from each, as shown in
Figure 8
. Retain the screws to install the new mixers.
10. Install the new A27 and A30 mixers using the screws removed from the old mixers. Be
sure to orient the mixers as shown in
Figure 8
.
11. Reconnect the ribbon cable and place the mixer bracket, with all four mixers attached,
into the analyzer. Observe the
CAUTION
above.
12. Reinstall the four screws (item
⑥
) to secure the bracket.
13. Reconnect all RF cables (item
⑤
) to the mixers.
