Rf Assembly - Agilent Technologies 8590L Service Manual

Replacing Major Assemblies

RF Assembly

RF Assembly
This procedure applies to:
Use ESD precautions when performing this replacement procedure.
CAUTION
Removal
1. Remove the instrument cover assembly. Refer to the
2. Place the analyzer with the bottom side facing up.
3. Disconnect the W10 semi-rigid cable (2) from the INPUT connector.
4. If the instrument came equipped with a tracking generator,
5. On 8591E spectrum analyzers and 8591C cable TV analyzers,
6. Remove the four screws (3) securing the RF assembly to the chassis.
7. Place the analyzer with the top side facing up.
8. Clip the tie wraps (9) which secure W8 and W9 to the other cables.
9. Disconnect the W9 cable (4) from A9J4, the 321.4 MHz INPUT.
10.Disconnect the W8 cable (5) from A9J5, the 600 MHz OUT.
11.Remove the four screws (10) securing the A7 Analog board to the
12.Remove the A7 Analog Interface assembly. Refer to the
13.If the instrument came equipped with a tracking generator
14.Remove the bracket (11) which secures the RF assembly to the IF
To prevent cable damage, make sure that W10 and W31 are completely
CAUTION
disconnected before removing the RF assembly.
308
8590L and 8591E spectrum analyzers
8591C cable TV analyzers
Cover." removal procedure.
See Figure 7-5.
disconnect W31 (8) from the RF OUTPUT.
disconnect W20 (7) from counter lock assembly A25A1J1.
chassis. Note that one of these is a pozidrive screw which attaches to
the RF assembly.
Interface Assembly."
assembly, disconnect the SMA cables connected to the A7A1
Tracking Generator Control assembly.
section.
removal procedure.
"Instrument
"A7 Analog
Chapter 7