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Step 7. Install the 50 GHz Components
Refer to
Figure 10
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 as shown.
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 as shown.
Install the A25 and A26 50 GHz Step Attenuators
1. Remove the old 20 GHz attenuators from their mounting brackets, and use the screws to
mount the new 50 GHz step attenuators onto the new attenuator brackets. Make sure the
brackets and attenuators are oriented as shown.
2. Place the new step attenuators, with brackets attached, in position as shown.
3. Secure each attenuator bracket to the test set deck using three screws (item
removed from the 20 GHz brackets.
4. Connect the ribbon cable to each new step attenuator (previously disconnected from the
20 GHz attenuators) as shown.
16
x
) into the back of the MA 26.5.
y
) that were removed from the A17 MASS 26.5 to loosely install
Table 1 on page
4.
z
) that were
{
) that were
Installation Note N5230-90022
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