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Step 8. Install the 50 GHz Components
Refer to
Figure 12
for this procedure. New parts are listed in
Install the A18 MA 26.5
1. Loosely install three new screws (item
2. Place the MA 26.5 in position as shown aligning the screws in the three keyholes in the
test set deck side frame. Once properly aligned, tighten the screws.
3. Connect the new ribbon cable between the A18 MA 26.5 at A18J1 and the A16 test set
motherboard at A16J7 (MA 26).
Install the A19 MASS 50
1. Place the MASS 50 in position as shown.
2. Use the four screws (item
the A19 MASS 50. Leave these screw loose; they will be tightened later.
3. Connect the ribbon cable and the flexible coaxial cables (previously disconnected from the
A17 MASS 26.5) to the A19 MASS 50.
Install the A20 50 GHz Mixer Brick
1. Install the 4-dB pad on the LO input of the 50 GHz mixer brick as shown.
2. Place the 50 GHz mixer brick in position as shown.
3. Secure the mixer brick to the test set deck using the four screws (item
removed from the 20 GHz mixer brick.
4. Connect the ribbon cable and the four flexible coaxial cables (previously disconnected from
the 20 GHz mixer brick) to the 50 GHz mixer brick.
Install the A21 and A22 Test Port Couplers and the Front-Panel LED Board
1. Adhere a rubber bumper to each new 50 GHz coupler as shown below.
2. Install the LED board removed from the old test set deck front panel onto the new front
panel using the three screws (item
3. Install the 50 GHz couplers in the new test set deck front panel and secure them with the
flange nuts (item
4. Set the new test set deck front panel aside for installation later.
Installation Note N5230-90010
②
) that were removed from the A17 MASS 26.5 to loosely install
④
) removed from the old front panel.
⑤
) removed from the 20 GHz couplers.
Table 1 on page
①
) into the back of the MA 26.5.
7.
③
) that were
21
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