382 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide
Assembly Replacement
A7 Real Time BBG Assembly (N5172B and N5182B Option 660)
A7 Real Time BBG Assembly (N5172B and N5182B Option 660)
Tools Required
— T-10 driver
— 5/16” open-ended wrench
— needle-nose pliers
Removal Procedure
Refer to Figure 15-30 for this procedure.
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to “Outer Cover” on
page 336 and “Inner Top Cover” on page 338.
3. Place the signal generator flat with the A7 Real Time BBG assembly facing
up and the rear panel facing you.
4. Refer to Figure 15-30. Remove power cable W12 from the A7 Real Time
BBG assembly.
5. Remove power cable W10 from the A1 Power Supply.
6. Remove the four screws (2) attaching the A8 Real Time BBG Jumper
board. Unplug and remove the jumper board.
7. Refer to Figure 15-30. Using the T-10 driver, remove the eight screws (1)
attaching the A7 Real Time BBG assembly to the chassis deck.
8. Remove the A7 Real Time BBG assembly.
Replacement Procedure
1. Reverse the order of the removal procedure.
When plugging in the A8 Real Time Jumper Board into the A2 and A7 boards, it is
important to have all boards loose in order to ensure proper connector mating.
Follow these steps:
a. It will be necessary to loosen the five screws (2) and (3) (refer to
Figure 15-6, “A2 Vector BBG Assembly (Option 660),”) attaching the A2
Vector BBG assembly to the chassis before plugging in the A8 Real Time
Jumper Board.
b. After the A8 Jumper board is plugged into both the A2 and A7 boards,
tighten the four A8 board screws (2) first. Refer to Figure 15-30, “A7 Real
Time BBG Assembly (N5172B, N5182B Option 660),”.
c. Then you can tighten the eight screws for the A7 board and the five screws
for the A2 board.
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