Agilent Technologies 856290216 service manual A9 Input Attenuator

A9 Input Attenuator

Removal

1.Place the spectrum analyzer upside-down on the work bench.

2.Remove W41 and W43.

3.Disconnect W34 from A7 and move this cable out of the way.

4.Remove screw (1) securing the attenuator to the front frame center support. See Figure 4-14.

5.Remove screw (1) securing the A9 input attenuator to the right side frame. See Figure 4-15.

6.Remove the attenuator and disconnect the attenuator ribbon cable.

Replacement

1.Ensure that the bracket that secures the attenuator to the front frame center support is attached to the attenuator. The bracket should be on the same end as the ribbon cable connector.

2.Connect the attenuator-control ribbon cable to the A9 input attenuator.

3.Place the A9 input attenuator into the spectrum analyzer with the A9 mounting brackets resting against the front frame center support and the right side frame. Use caution to avoid damaging any cables.

4.Attach the attenuator to the center support with one panhead screw (1). See Figure 4-14.

5.Attach the attenuator to the right side frame with one flathead screw (1). See Figure 4-15.

6.Reconnect W34 to A7.

7.Connect semirigid cables W41 and W43 to A9, AlO, and the RF input connector. Torque all SMA connections to 113 Ncm (10 in-lb).

4-32 Assembly Replacement